enclosure 2 mfn 08-827 nedc-33408p, supplement 1 non ...dryer design" implementation of a...
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ENCLOSURE 2
MFN 08-827
NEDC-33408P, Supplement 1
Non-Proprietary Version
IMPORTANT NOTICE
This is a non-proprietary version of Enclosure 1 MFN 08-827, which has the proprietaryinformation removed. Portions of the document that have been removed are indicated bywhite space inside open and closed bracket as shown here [[ I].
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SI-HITACHI GE Hitachi Nuclear Energy
NEDO-33408Supplement 1
Revision 0Class I
DRF 0000-0087-0242October 2008
Licensing Topical Report
ESBWR Steam Dryer -Plant Based Load Evaluation
Methodology
Supplement 1
Non-Proprietary Version
Copyright 2008 GE Hitachi Nuclear Energy
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NEDO-33408 Supplement 1Non-Proprietary Version
IMPORTANT NOTICE REGARDING THE
CONTENTS OF THIS REPORT
Please Read Carefully
INFORMATION NOTICE
This is a non-proprietary version of NEDC-33408P Supplement 1, which has the proprietary
information removed. Portions of the document that have been removed are indicated by an
open and closed bracket as shown here
Copyright GE Hitachi Nuclear Energy 2008
IMPORTANT NOTICE REGARDING THE CONTENTS OF THIS REPORT
LEGAL NOTICE
The information contained in this document is furnished as reference to the NRC Staff for the
purpose of obtaining NRC approval of the ESBWR Certification and implementation. The only
undertakings of GE Hitachi Nuclear Energy (GEH) with respect to information in this document
are contained in contracts between GEH and participating utilities, and nothing contained in this
document shall be construed as changing those contracts. The use of this information by anyone
other that for which it is intended is not authorized; and with respect to any unauthorized use,
GEH makes no representation or warranty, and assumes no liability as to the completeness,
accuracy, or usefulness of the information contained in this document.
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Table of Contents
1.0 IN TR O D U CTIO N ................................................................................................................ 2
2.0 M O DEL D ESCRIPTIO N .................................................................................................... 3
2.1 OVERVIEW ................................................................................................................... 32.2 D OM E A COU STIC M OD EL ........................................................................................ 62.3 PBLE FROM [[ . 11 ............................................................ 10
2.3.1 Equations ............................................................................................... 102.3.2 with RPV ................................................................ 132 .3 .3 ]] ........................................................... 162.3.4 Singularity Factor ............................................................................................................. 30
2.4 STEAM A COU STIC PROPERTIES ........................................................................... 332 .4 .1 ]] ........................................................ 342 .4 .2 ........................................................................................... 3 5
3.0 MODEL QUALIFICATION: BWR PLANT VALIDATION ....................................... 41
3.1 PRO CEDU RE FO R BEN CHM A RK S ......................................................................... 413.1.1 Instrumentation at QC2 and SSES .................................................................................... 413 .1.2 ff ]] ....................................................................... 4 83.1.3 Benchmark Presentation ................................................................................................... 59
3.2 Q C2 BEN CHM ARK S FROM [[ ]] ............................................ 633 .2 .1 A t E P U ............................................................................................................. 6 33 .2 .2 A t E P U ............................................................................................................. 6 43 .2 .3 A t E P U ............................................................................................................. 6 53 .2 .4 A t E P U ............................................................................................................. 6 6
3.3 SSES BENCHMARKS FROM [[ ]] .............................. 673 .3 .1 A t E P U ............................................................................................................. 6 73 .3 .2 A t E P U ............................................................................................................. 6 8
3.4 Benchm ark conclusions ................................................................................................ 69
4.0 APPLICA TIO N M ETH O D O LO G Y ....................................... I ........................................ 71
4.1 SCOPE OF APPLICATION AND LICENSING REQUIREMENTS ......................... 714.1.1 Scope of Application ......................................................................................................... 714.1.2 Specific Licensing Requirements ..................................................................................... 71
4.2 PROPO SED APPLICA TION M ETH ODOLOGY ...................................................... 714.2.1 Conformance with Regulatory Guide 1.20 Rev 3 ............................................................. 72
4.3 RAN GE OF A PPLICA TION ....................................................................................... 764.4 PLANT-SPECIFIC APPLICATION METHODOLOGY ........................................... 76
4.4.1 M odel Inputs ................................................................................................ 764.4.2 ]] M odel .......................................................................................... 774.4.3 Plant Input M easurements ................................................................................................. 774.4.4 Plant-Specific Load Definition ......................................................................................... 79
4.5 A PPLICATION UN CERTA INTIES AN D BIA SES ................................................... 814.5.1 Overall M ethodology ........................................................................................................ 814.5.2 Generic Sensitivity Assessment ........................................................................................ 864.5.3 Plant Specific Application M ethodology .......................................................................... 88
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5.0 C O N CLU SIO N S ................................................................................................................ 94
6.0 R EFEREN C E S ................................................................................................................... 95
APPENDIX A
APPENDIX B
APPENDIX C
APPENDIX D
APPENDIX E
APPENDIX F
APPENDIX G
APPENDIX H
APPENDIX I
APPENDIX J
QC2 BENCHMARK PSDS: [[ ]] EPU ........................................... 97
QC2 BENCHMARK PSDS: [[ ]] EPU ............................................. 106
QC2 BENCHMARK PSDS: [[ ]] EPU ............................................. 115
QC2 BENCHMARK PSDS: [[ ]] EPU ............................................. 124
SSES BENCHMARK PSDS [[ ]] EPU ............................................ 133
SSES BENCHMARK PSDS [[ ]] EPU ............................................ 138
QC2 SENSITIVITY ASSESSMENT ......................................................... 143
SSES SENSITIVITY ASSESSMENT ....................................................... 155
CORRELATION OF STRAIN GAGE DATA TO ACOUSTICPRESSURE EXPERIMENTAL TESTING ................................................ 160
ACOUSTIC FINITE ELEMENT PROGRAM REQUIREMENTSF O R P B L E .................................................................................................. 192
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Acronyms and Abbreviations
Acronym / Description
Abbreviation
ID One Dimensional
3D Three Dimensional
BWR Boiling Water Reactor
CAD Computer-Aided Design
CLTP Current Licensed Thermal Power
CFD Computational Fluid Dynamics
CFR Code of Federal Regulations
DAS Data Acquisition System
DOE Design Of Experiments
EPU Extended Power Uprate
ESBWR Economic Simplified Boiling Water Reactor
FE / FEM Finite Element / Finite Element Method / Finite Element Model
FRF Frequency Response Function
GDC General Design Criteria
GEH GE Hitachi Nuclear Energy
Hz Hertz
ID Inside Diameter
LTR Licensing Topical Report
MSIV Main Steam Isolation Valve
MSL Main Steam Line
OLTP Original Licensed Thermal Power
NRC Nuclear Regulatory Commission
PBLE Plant Based Load Evaluation
PSD Power Spectral Density
PT Pressure Transducer / Pressure Sensor
PWR Pressurized Water Reactor
QC2 Quad Cities Unit 2
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Acronym / DescriptionAbbreviation
RG Regulatory Guide
RMS Root Mean Squared
RPV Reactor Pressure Vessel
SG Strain Gage
SF Singularity Factor.
SRSS Square Root of the Sum of the Squares
SRV Safety / Relief Valve
SSES Susquehanna Steam Electric Station
StDev Standard Deviation
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NEDO-33408 Supplement 1Non-Proprietary Version
Abstract
NEDC-33408P, Licensing Topical Report- ESBWR Steam Dryer - Plant Based Load Evaluation
Methodology, provides a methodology termed Plant Based Load Evaluation (PBLE) for defining
the fluctuating pressure loads acting upon the Economic Simplified Boiling Water Reactor
(ESBWR) steam dryer. This supplement to NEDC-33408P provides additional benchmarking
results of the PBLE against data taken during startup testing of an instrumented replacement
steam dryer at the Susquehanna Steam Electric Station (SSES). The supplement also provides a
description of the additional modeling and methodology as well as the benchmarking results for
the PBLE when using [[ ]] instrumentation data as input.
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1.0 INTRODUCTION
As a result of steam dryer issues at operating Boiling Water Reactors (BWRs), the US Nuclear
Regulatory Commission (NRC) has issued revised guidance concerning the evaluation of steam
dryers [2]. As part of that guidance, the analysis must demonstrate that the dryer will maintain
its structural integrity without failing due to fatigue during normal plant operation when
subjected to the vibrations resulting from acoustic and hydrodynamic fluctuating pressure loads.
This demonstration of steam dryer structural integrity requires three steps:
* Prediction of the fluctuating pressure loads on the dryer,
* Application of the fluctuating pressure loads in a structural analysis to qualify the steam
dryer design
" Implementation of a startup, test program for confirming the steam dryer design as the
plant performs power ascension.
The Plant Based Load Evaluation (PBLE) is an analytical tool developed by GEH to perform the
prediction of fluctuating pressure loads on the steam dryer. NEDC 33408P [1] provides the
theoretical basis of the PBLE method that will be applied for determining the fluctuating loads
on the ESBWR steam dryer, describes the PBLE analytical model, describes the PBLE analytical
model, and provides benchmark and sensitivity results of the PBLE with [[ ]] pressure
data.
This report is a supplement to NEDC 33408P [1]. The initial report focused on a load solution
that uses [[
]] NEDC 33408P, Supplement 1 describes the load solution obtained from
[[ ]] In addition,this supplement provides the results of benchmarking and sensitivity studies of the PBLE against
measured [[ ]] pressure data taken during power ascension test of a replacement steam
dryer installed at the Susquehanna Steam Electric Station Unit 1 (SSES). Finally, this
supplement describes the application of the PBLE method to the evaluation of the ESBWR steam
dryer and describes the method to be used to assess bias plus uncertainty of the resulting loads
with [[ I].
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2.0 MODEL DESCRIPTION
Section 2.1 provides a brief overview of the PBLE model. Section 2.2 provides a summary of
the steam dome acoustic model presented in detail in the [[ ]] PBLE report [1]. The
steam dome acoustic model [[
]] Section 2.3 develops the methodology for the [[ ]] formulation for the PBLE.
2.1 OVERVIEW
The PBLE can be [[
]] This is the methodology to be used
in the ESBWR evaluation and is described in [1]. [[
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11
Figure 1 PBLE process flow
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As operating experience is gained with the ESBWR steam dryer and steam line configuration,
the [[ ]] PBLE will provide a less invasive means of monitoring the acoustic pressure
loads for follow-on plants. The [[ ]] system has an associated
high cost for design and installation since the [[]] The instrumentation used for
the [[ ]] has better long-term reliability than the [[]] The operating lifetime of [[
]] also provides a backup for the [[on-dryer instrumentation{3}]] for the
ESBWR lead plant applications in case there is an extended power ascension test period.
Therefore, an additional formulation of the PBLE methodology that uses [[]
measurements is provided in this licensing topical report supplement.
The lower chart in Figure 1 outlines the PBLE solution path when using [[
The PBLE from [[ ]] has two main components:
* An acoustic finite element model (3D) representing [[
]] as
described in [1]).
Referring to the lower chart in Figure 1, on the top left comer, [[
]] These [[
]] This is the
Er ]] component of the PBLE shown in Figure 1 and is described in further
detail in Section 2.3.1. The [[
]] This is the [[ ]] component of the PBLE shown in
Figure 1 and described in further detail in Section 2.2.
The [[
]] (Section 2.3.2).
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[[]] - see Section 2.3.3). Additional [[
(Section 2.3.3).
Both the PBLE from [[ ]] solution paths are
developed based on the commercial software packages MATLAB® [3] and SYSNOISE® [4].
MATLAB® is a software package designed for engineering computations and is used for
performing the [[ ]] in the PBLE. The general architecture of the PBLE
scripts makes use of the MATLAB® programming language and graphical interface. The [[]] is also implemented in MATLAB® (Section 2.3.1).
The vessel acoustic response is calculated with SYSNOISE®. SYSNOISE® is a program for
modeling acoustic wave behavior in fluids, using implementations of the finite element and
boundary element methods. In the PBLE application, SYSNOISE® is used to calculate the
sound wave propagation through an acoustic finite element model of the steam regions in the
reactor. This 3D acoustic model is described in detail in Section 2 of Reference 1.
2.2 DOME ACOUSTIC MODEL
The dome acoustic model is described in detail in the initial report [1]. This section summarizes
the key aspects of the dome model.
The dome FE mesh (Figure 3) comprises all RPV steam volumes [[
]] The SYSNOISE® [4] program was used to generate the models and
benchmarking provided here. Alternate FE programs as described in Appendix J can also be
used.
In all GEH BWRs, there are two basic steam zones with different steam qualities; upstream of
the dryer [[
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11Validation of the use of [[ ]] is performed through the
benchmarking process in Section 3.0 and confirms this assumption.
The PBLE is formulated under the [[
]] (Figure 2). [[
J] Validation of the [[
]] is performed through the benchmarking process in Section 3.0
and confirms this location.
E[
Figure 2 11 11
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11
Figure 3 Modeled Steam Region (left)
and Details of Typical Vessel Meshes (right)
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The [[
(Figure 4). The total vessel response can then [[
Figure 4 E[
1]
11
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2.3 PBLE FROM [[ 11
The PBLE model described in Reference I used [[
describes the PBLE modeling used to determine the [[
]]. This section
2.3.1 [[ 11 Equations
LI]] which was initially described
by Seybert and Ross [5] and Chung and Blaser [6]. The more recent [[
Jones and Stiede [7], Jones and Parrott [8] and Chu [9].
1] are
[I
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]] From the momentum equation given by Munjal
[10] in Section 1.4 (moving medium), [[
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]] by Morse and Ingard [12]: I[
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2.3.2 I[ II with RPV
The approach in the previous section describes [[
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]] which is the topic
of the next section (Section 2.3.3).
R
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1]
2.3.3 [[ 11
Fi
Figure 5 provides a depiction of the average [[
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Figure 5 [[
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2.3.3.1 General Formulation of Equations
[[
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2.3.3.2 Incorporating the 11
This section describes the [[
11
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2.3.3.3 II
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1]
2.3.4 Singularity Factor
The Singularity Factor (SF) is a tool to understand the mathematical limitations in the PBLE. It
is calculated as: [[
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as seen in Figure 6. A large [[
1]Figure 6 [1
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]] (Figure 7). Using [[
]] for the plant specific PBLE application is contained in
Section 4:4.3.1.
]]
Figure 7 [1
11
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11
Figure 8 [[
2.4 STEAM ACOUSTIC PROPERTIES
The steam and water characteristic properties used in PBLE models are: [[
1]
Properties for the vessel model are described in detail in the initial LTR [1]. [[
This section first addresses these L[
11
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112.4.1 [[
The variable nomenclature for this section is in Table 1.
Table 1 Variables in Eauations (38) throueh (41)
-1- i
+ F F
+ F
± F F
I- F
Ingard and Singhal [15] propose a model for [[
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The friction factor f also known as Darcy-Weisbach friction factor, is an empirical factor
tabulated in Moody's diagram [16]. For flow with Reynolds numbers Re > 4000, the friction
factor can also be determined by the Colebrook equation (which approximates Moody's
diagram), presented here in the explicit version of Haaland [26]:
(40) f+ 1.8log ( 3 .7 1 + 6.9
3.7 Re
From which unfolds: [[
2.4.2 II 11
The dryer is designed to remove large moisture droplets from the steam. [[
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are included in Table 2.
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Table 2 [1
The four resulting points are plotted in Figure 9 as asterisks. The relation [[
]] As shown in
Figure 9,
The red curve in Figure 9 is a
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Table 3 [[
+ + + + +
i 4 + + i
F 4 4 F +
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Figure 9 f[
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3.0 MODEL QUALIFICATION: BWR PLANT VALIDATION
Two GEH BWR units went through steam dryer replacement programs in the recent years:
" Quad Cities Unit 2 (QC2) in 2005;
* Susquehanna Unit 1 (SSES) in 2008.
The replacement dryers were instrumented with a significant number of on-dryer pressure
sensors. The units were also equipped with MSL instrumentation (strain gage bridges). Several
measurement campaigns provided MSL and RPV datasets, used here to benchmark the PBLE
predictions.
[[I
The QC2 benchmarks are PBLE predictions [[ ]] These QC2 Benchmark
results are presented in Section 3.2. The SSES benchmarks are PBLE predictions [[
]] and provide additional benchmarking of the PBLE method that
complements the previous QC2 benchmarks from [[ ]] in report NEDC
33408P [1]. These SSES benchmark results are presented in Section 3.3.
3.1 PROCEDURE FOR BENCHMARKS
3.1.1 Instrumentation at QC2 and SSES
The QC2 dryer instrumentation comprised 27 pressure sensors, labeled P:1 through P:27 (See
Figure 10). Pressure sensor P:26, which was installed on the stream dryer temporary
instrumentation mast, is not considered in this benchmark since the main interest is in pressure
on the dryer surface.
The SSES dryer instrumentation had [[
11
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ge
Figure 10 QC2 Replacement Dryer Instrumentation
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Figure 10 QC2 Replacement Dryer Instrumentation
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lI
Figure 11 SSES Replacement Dryer Instrumentation
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[1
Figure 11 SSES Replacement Dryer Instrumentation
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The QC2 MSLs were instrumented with strain gage assortments at three locations per line; only
the upper two (elevation 651-foot and elevation 621-foot) are used in the following benchmarks.
These two positions are upstream of all valves and included four circumferentially oriented
gages at each location. The lower locations had two strain gages at each location.
The MSL and RPV data used in QC2 benchmarks was acquired simultaneously [18]. The SSES
dataset comprises [[ ]] that was obtained during the March 2008 power
ascension testing [24]. Datasets are summarized in Table 4 below.
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Table 4 Datasets Used in QC2 and SSES Benchmarks
]]Data ]]Data
Power Instruments Date Power Instruments Date
Quad Cities Unit 2 Cases
2 3 locations per line27 pressure 20
2005 transmitters]], 4 strain gages
3 per location
4
'S,',Susquehanna.Unit I Cases .
E[ ]]Ipressures 2008
transmitters
2 on dryer
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For the SSES benchmarks from [[pressure sensors are used: [[
]] the following configuration of input
11
3.1.2 [1
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11
1]
Figure 12 [[ 11 Benchmark [I
11
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Figure 13
are shown in Figure 14, Figure 15 and Figure 16 for both
Figure 17 includes the benchmark PSD comparisons between predictions using these
Figure 18 depicts the benchmark predictions limiting the
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]] are described in Figure 19 and
Figure 20. As shown in Figure 19, the [[
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Figure 14 Comparison of [I
ll
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It
Figure 15 Plot of the [[ 11
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fir
Figure 16 [[ 11
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11l
Figure 17 1[
11
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Fi
Figure 18 [I
11
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[1
Figure 19 [I ll
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Figure 20 [[ 11
3.1.3 Benchmark Presentation
The results presented below for the [[ are all obtained using the
]] (Figure 19 and Figure
20). [[
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Error Calculation
are computed and displayed in
bar charts (Sections 3.2 and 3.3 for each benchmark):
are
calculated and displayed in bar charts (Sections 3.2 and 3.3 for each benchmark):
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The last segment PSDs at all sensors locations are plotted in Appendix A through Appendix D for
the QC2 cases. The last segment PSDs at all sensors locations are plotted in Appendix E and
Appendix F for the SSES cases. A comparison of the PSD plots from SSES and QC2 indicates
that there is [[
]] QC2 and SSES plants represent a good test case for the PBLE
benchmark because together they provide [[]]
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Table 5 Frequency Bands for Main Acoustic Peaks
QC2 SSES
ti ]] EPU ]]P~wr II ]] EPUPower EP] EPU Power Power
Begin End Begin End Begin EndFrequency Frequency Frequency Frequency Frequency Frequency
(Hz) (Hz) (Hz) (Hz) (Hz) (Hz)
8 10 8 10 5 10
13 16 13 16 11 20
22 26 22 26 21 28
29 31 28 34 29 39
32 35 38 46 40 50
44 48 48 58 51 62
49 60 61 69 63 69
61 69 70 76 70 75
70 76 77 82 76 89
77 82 82 88 90 99
82 88 89 95 100 109
89 95 96 102 110 122
96 102 103 110 123 131
103 110 111 116 132 149
130 136 117 128 150 168
137 142 129 146 169 181
147 149 147 153 182 194
150 153 154 158 195 205
154 158 159 168 206 225
150 158 146 158 226 250
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3.2 QC2 BENCHMARKS FROM [[ 11
3.2.1 At 1[ ]] EPU
Figure 21 QC2 [[ 11 EPU benchmark overview
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3.2.2 At 1[ 11 EPU
Figure 22 QC2 [I ]] EPU benchmark overview
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3.2.3 At [I ]1 EPU
Figure 23 QC2 [[ II EPU benchmark overview
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3.2.4 At [[ 11 EPU
1]
Figure 24 QC2 [I 1] EPU benchmark overview
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3.3 SSES BENCHMARKS FROM [[ II
3.3.1 At II 1] EPU
Figure 25 SSES [[ l1 EPU benchmark overview: [[1l
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3.3.2 At [[ 11 EPU
11
Figure 26 SSES [[
1111 EPU benchmark overview
11
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3.4 BENCHMARK CONCLUSIONS
As shown in Figure 27, the PBLE predictions from [[
]]
Overall the four QC2 benchmarks are well balanced and validate the [[
]] The PBLE from [[
emerges as a viable tool for developing dryer load definitions. The frequency content and the
spatial distribution are well matched, the amplitude predictions are generally conservative and
pressures away from the MSL nozzles are consistent with plant test data from other dryers.
As shown in Figure 28, the PBLE predictions from [[
1]]
The SSES benchmarks at two test conditions using the PBLE [[
demonstrate the good behavior of the acoustic dome model and source assumptions and
complement the results of the two QC2 cases depicted in Reference 1.
It should be noted that the [[
]] as can be observed
from the PSD comparisons included in Appendices E and F. [[1]
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11
Figure 27 Benchmark Summary - PBLE with [[ 11
1E
Figure 28 Benchmark Summary - PBLE with [[ II
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4.0 APPLICATION METHODOLOGY
4.1 SCOPE OF APPLICATION AND LICENSING REQUIREMENTS
4.1.1 Scope of Application
The purpose of the Plant Based Load Evaluation is to provide a methodology for using plant
measurements to determine the fluctuating pressure loads that the ESBWR steam dryer will
experience during normal operation. This fluctuating load definition can then be applied to a
finite element model of the ESBWR steam dryer in order to determine the structural qualification
of the dryer. This section describes the methodology that will be used in applying the PBLE to
develop the dryer load definition.
4.1.2 Specific Licensing Requirements
Plant components such as the steam dryer in a BWR nuclear power plant perform no safety
function but must retain their structural integrity to avoid the generation of loose parts that might
adversely impact the capability of other plant equipment to perform their safety function.
Potential adverse flow effects must be evaluated for the steam dryer to meet the requirements of
GDC 1 and 4 in Appendix A of 10 CFR Part 50.
Standard Review Plan [22], Section 3 requires that the dynamic responses of structural
components with the reactor vessel caused by steady state and operational flow transient
conditions should be analyzed for prototype (first of a design) reactors. Similarly, Standard
Review Plan [23], Appendix A requires rigorous assessments of the potential for adverse flow
effects for minor modifications to components susceptible to flow-excited acoustic and structural
resonances in non-prototype plants. The analytical assessment of the vibration behavior of the
steam dryer includes the definition of the input-forcing function including bias errors and
uncertainty. References 22 and 23 contain specific acceptance criteria related to formulating
forcing functions for vibration prediction. Reference 2 provides guidance on acceptable methods
for formulating the forcing functions for vibration prediction.
4.2 PROPOSED APPLICATION METHODOLOGY
The PBLE method for formulating the forcing function for vibration prediction for the ESBWR
steam dryer is in conformance with the guidance contained in Regulatory Guide 1.20 Revision 3
[2].
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4.2.1 Conformance with Regulatory Guide 1.20 Rev 3
The following table provides the conformance of the PBLE to the requirements contained in
Section 2.1 of Regulatory Guide 1.20 Revision 3 [2].
RG 1.20 Criteria PBLE Conformance
Section
2.1 .(1)(a) Determine the pressure fluctuations and vibration in Acceptable - The PBLE method isthe applicable plant systems under flow conditions applicable up to the full power level of
up to and including the full operating power level, the plant. Benchmarking results
Such pressure fluctuations and vibration can result contained in Section 3.0 of this reportfrom hydrodynamic effects and acoustic resonances show that the method is capable of
under the plant system fluid flow conditions, accurately determining pressure
fluctuations from both hydrodynamic
and acoustic resonance sources under
flow conditions up to the plant full
operating power level.
2.1.(1)(b) Justify the method for determining pressure The justification that the PBLE methodfluctuations, vibration, and resultant cyclic stress in is acceptable is based on theplant systems. Based on past experience, benchmarking shown in Section 3.0 of
computational fluid dynamics (CFD) analyses might this report. The stress analysis is outsidenot provide sufficient quantitative information the scope of this LTR. CFD modeling is
regarding high-frequency pressure loading without not applicable to the PBLE method.
supplemental analyses. Scale testing can be applied
for the high-frequency acoustic pressure loading and
for verifying the pressure loading results from CFD
analyses and the supplemental analyses, where the
bias error and random uncertainties are properly
addressed.
2.1.(1)(c) Address significant acoustic resonances that have the Acceptable - the PBLE is capable of
potential to damage plant piping and components determining acoustic resonances that
including steam dryers, and perform modifications may be detrimental to the steam dryer.
to reduce those acoustic resonances, as necessary, Modifications for reducing acoustic
based on the analysis. resonances are beyond the scope of this
LTR.
2.1.(1) Scale Model Testing Not applicable - Scale model testing is
not used in the PBLE for determination
of the steam dryer loads.
2.1.(1) Computational Fluid Dynamic (CFD) modeling Not applicable - CFD modeling is notused in the PBLE for determination of
the steam dryer loads.
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RG 1.20 Criteria PBLE Conformance
Section
2.1.(2) Describe the structural and hydraulic system natural Acceptable - The PBLE is capable of
frequencies and associated mode shapes that may be determining the acoustic mode shapes
excited during steady-state and anticipated transient within the reactor steam dome. It will
operation, for reactor internals that, based on past simulate the acoustic response of the
experience, are not adversely affected by the flow- steam dome from the significant
excited acoustic resonances and flow-induced excitation sources.
vibrations. Additional analyses should be performed
on those systems and components, such as steam
dryers and main steam system components in BWRs
and steam generator internals in PWRs, that may
potentially be adversely affected by the flow-excited
acoustic resonances and flow-induced vibrations.
These additional analyses are summarized below.
2.1.(2) Determine the damping of the excited mode shapes, Acceptable - FRFs are determined byand the frequency response functions (FRFs, i.e., the PBLE. Bias errors and uncertainties
vibration induced by unit loads or pressures, and have been addressed in Sections 3 and 4.
stresses induced by unit loads or pressures), Structural mode shapes and FRFs are
including all bias errors and uncertainties, outside the scope of this LTR.
2.1.(3) Describe the estimated random and deterministic Acceptable - the PBLE is capable of
forcing functions, including any very-low-frequency determining the forcing functions in the
components, for steady-state and anticipated frequency range important to BWR
transient operation for reactor internals that, based dryers.
on past experience, are not adversely affected by the
flow-excited acoustic resonances and flow-induced
vibrations. Additional analyses should be performed
on those systems and components, such as steam
dryers and main steam system components in BWRs
and steam generator internals in PWRs, that may
potentially be adversely affected by the flow-excited
acoustic resonances and flow-induced vibrations.
These additional analyses are summarized below.
2.1.(3) Evaluate any forcing functions that may be Lock in assessment is not required for
amplified by lock-in with an acoustic and/or PBLE loads developed using main steam
structural resonance (sometimes called self- line data. [excitation mechanisms). A lock-in of a forcing
function with a resonance strengthens the resonance
amplitude. The resulting amplitudes of the forcingfunction and resonance response can therefore be
significantly higher than the amplitudes associated
with non-lock-in conditions.
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RG 1.20 Criteria PBLE Conformance
Section
2.1.(3) The applicant/licensee should determine the design Acceptable - The PBLE uses in plant
load definition for all reactor internals, including the data, [[ ]], for
steam dryer in BWRs up to the full licensed power the determination of the steam dryer load
level, and should validate the method used to definition. Scale model date is not used
determine the load definitions based on scale model in the PBLE methodology. Steam dryer
or plant data. BWR applicants should include strain and acceleration measurements are
instrumentation on the steam dryer to measure outside the scope of this LTR.
pressure loading, strain, and acceleration to confirm
the scale model testing and analysis results. BWR
licensees should obtain plant data at current licensed
power conditions for use in confirming the results of
the scale model testing and analysis for the steam
dryer load definition prior to submitting a power
uprate request.
2.1.(3) In recent BWR EPU requests, some licensees have Acceptable -The PBLE methodology inemployed a model to compute fluctuating pressures this report demonstrates the
within the RPV and on BWR steam dryers that are methodology to determine bias errorsinferred from measurements of fluctuating pressures and uncertainties associated with the
within the MSLs connected to the RPV. Applicants PBLE methodology when [[should clearly define all uncertainties and bias errors
associated with the MSL pressure measurements and
modeling parameters. The bases for the uncertainties
and bias errors, such as any experimental evaluation
of modeling software, should be clearly presented.
There are many approaches for measuring MSL
pressures and computing fluctuating pressures
within the RPV and the MSLs. Although some
approaches reduce bias and uncertainty, they still
have a finite bias and uncertainty, which should be
reported. Based on historical experience, the
following guidance is offered regarding approaches
that minimize uncertainty and bias error:
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RG 1.20 Criteria PBLE Conformance
Section
2.1.(3)(a) At least two measurement locations should be Acceptable - The PBLE methodologyemployed on each MSL in a BWR. However, using described in this report requires the usethree measurement locations on each MSL improves of at least two measurement locations for
input data to the model, particularly if the locations each MSL. As discussed in this report,
are spaced logarithmically. This will reduce the the main steam line instrumentation
uncertainty in describing the waves coming out of sensors are placed such that no acoustic
and going into the RPV. Regardless of whether two sources exist between the measurement
or three measurement locations are used, no acoustic locations.
sources should exist between any of themeasurement locations, unless justified.
2.1.(3)( (b) Strain gages (at least four gages, circumferentially Acceptable - This report describes the
spaced and oriented) may be used to relate the hoop configuration of main steam line strain
strain in the MSL to the internal pressure. Strain gages used for MSL measurements.
gages should be calibrated according to the MSL Bias and uncertainty associated with the
dimensions (diameter, thickness, and static MSL measurement system is describedpressure). Alternatively, pressure measurements in this report.
made with transducers flush-mounted against the
MSL internal surface may be used. The effects of
flow turbulence on any direct pressure
measurements should be accounted for in a bias
error and uncertainty estimate.
2.1.(3)(c) The speed of sound used in any acoustic models Acceptable - The speed of sound in theshould not be changed from plant to plant, but rather PBLE is a function of the steam fluid
should be a function of temperature and steam conditions within the RPV and the
quality. MSLs.
2.1.(3)(d) Reflection coefficients at any boundary between Acceptable - the reflection coefficients
steam and water should be based on rigorous are based on the fluid conditions of the
modeling or direct measurement. The uncertainty of steam water interface. The associated
the reflection coefficients should be clearly defined, uncertainty is developed for the PBLE
Note that simply assuming 100-percent reflection method.
coefficient is not necessarily conservative.
2.1.(3)(e) Any sound attenuation coefficients should be a Acceptable - the PBLE formulation uses
function of steam quality (variable between the the steam quality in the reactor steam
steam dryer and reactor dome), rather than constant dome, within the steam dryer, and in the
throughout a steam volume (such as the volume MSLs to determine the sound attenuationwithin the RPV). coefficients in those regions.
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RG 1.20 Criteria PBLE Conformance
Section
2.1.(3)(f) Once validated, the same speed of sound, attenuation Acceptable - the formulations for thecoefficient, and reflection coefficient should be used speed of sound and damping used in thein other plants. However, different flow conditions PBLE are not changed between plant
(temperature, pressure, quality factor) may dictate applications. The plant-specific values
adjustments of these parameters. for these parameters are based on the
plant-specific thermodynamic properties
of steam in the RPV and the MSLs.
Other Model Benchmarking Acceptable - The PBLE is benchmarked
against previously instrumented dryer
data.
Other Determination of Biases and Uncertainty Acceptable - The biases and Uncertaintyhave been calculated for the PBLE.
Note that other sections of Reference 2 refer to structural analysis of the steam dryer or
preoperational/startup testing that is outside of the scope of this Licensing Topical Report.
4.3 RANGE OF APPLICATION
The PBLE method described in this report is capable of determining the vibratory forcing
function for the entire operating range of the ESBWR steam dryer.
4.4 PLANT-SPECIFIC APPLICATION METHODOLOGY
4.4.1 [[ ]] Model Inputs
The vessel [[
Further information on the vessel model is provided in Reference 1.
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4.4.2 [[ 11 Model
The [[ ]] model. Parameters for this model are listed
in Table 6. All the input parameters identified in Table 6 are specified in the PBLE script input
file. The PBLE scripts assemble the [[
4.4.3 Plant Input Measurements
4.4.3.1 Sensor Type and Location
MSL Instrumentation
For use with MSL instrumentation, the minimum PBLE configuration requires two sensor
locations per steam line. [[
11 If strain gauge bridges are used, the MSL
pressures are calculated from the pipe hoop stress measurements.
tE
1] Therefore, the sensors should be mounted
directly downstream of the vessel nozzle in a region where side branches, valves, and venturis
will not be located between the upper and lower sensor locations. These components may
impact the transmission of acoustic waves. [[
When strain gages are used, each location should be instrumented with a minimum of four strain
gages. The gages must be located away from [[
]] Further information on the conversion of strain to pressure and strain gage accuracy
is presented in Appendix I.
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The distance between [[
11
Dryer Instrumentation
[[
]] From benchmarks on the QC2 data, it was concluded that [[
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4.4.3.2 Plant Measurement Uncertainty
The PBLE uses in-plant measurements as input to the steam dryer pressure load predictions.
Uncertainties in these inputs will be propagated through the PBLE calculations, resulting in
uncertainties in the pressure load predictions.
Uncertainties in Measured Dryer Pressures
The measured dryer pressures have errors due to: [[
An example of these uncertainties is documented in Reference 21 for QC2. However the above
effects have a
Uncertainties in Measured MSL Pressures
In practice, input MSL pressures are measured with strain gage setups rather than pressure
sensors. The use of strain gauges to monitor MSL pressures introduces uncertainties in the
determination of the MSL pressures. On a given MSL, at least two measurement locations are
instrumented with a minimum of [[
]] when converting measured strain to pressure. This
error is evaluated in Appendix I.
4.4.4 Plant-Specific Load Definition
The following steps are involved in the calculation of dryer loads with the PBLE from MSL
measurements: [[
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]] the PBLEMATLAB® scripts are run and dryer loads are obtained.
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4.5 APPLICATION' UNCERTAINTIES AND BIASES
This section describes the process to calculate the uncertainty associated with the PBLE dryer
load definition for a plant-specific application.
The methodology presented here is based on two elements:
" The PBLE plant benchmark evaluations presented in Section 3.0 ([[ ]]) and
Reference 1 ([[ ]])
" A plant-specific sensitivity assessment for the PBLE input parameters.
The PBLE plant benchmark evaluations form the basis for the generic PBLE application bias and
uncertainty values. The plant-specific sensitivity assessment is performed to establish the
applicability of the generic PBLE application bias and uncertainty values to the plant under
consideration and, if necessary, determine the appropriate PBLE [[1]]
Section 4.5.1 describes the methodology used for performing the sensitivity assessment on the
PBLE inputs. Best estimate values of the input parameters are used to calculate a nominal case,
e.g., [[
]] The input parameters are then varied within a range that bounds the expected parameter
variation during operation or the parameter measurement uncertainty, as appropriate. The
perturbed results are then compared to the nominal case. This comparison demonstrates the
overall PBLE sensitivity to variations in the input parameters and identifies the contribution of
each input parameter to the overall uncertainty in the predicted dryer pressure loads.
Section 4.5.2 summarizes the generic sensitivity assessments performed for the QC2 [[
]] and for the SSES [[ ]] The details of these sensitivity
assessments are described in Appendices G and H, respectively.
Section 4.5.3 describes the plant-specific application methodology for evaluating the plant-
specific sensitivity assessment results relative to the generic results. The methodology also
describes the conditions under which [[
4.5.1 Overall Methodology
This section describes constituting elements of the sensitivity assessment: the specifications for
the nominal case, the input parameter variations for the sensitivity assessment, the Design of
Experiment (DOE) method employed, and the process for calculating the deviations from the
nominal case.
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Parameters in the Sensitivity Analysis
Table 6 Input parameters to the PBLE
1[
i i i
+ 4 i
4 4 i
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Analysis Technique: Design of Experiment (DOE)
A Design of Experiment (DOE) is a structured, organized method for determining the
relationship between parameters affecting a process and the output of that process. Changes are
made methodically to the input parameters and the impact on the results is assessed.
The variations in the PBLE results are assumed to be reasonably linear with respect to the
variations in the input parameters. In this case only the extreme values of parameters need to be
evaluated.
For each input parameter, a number of possible values are defined: in the present case, the
maximum value and the minimum value are considered. [[
Evaluating multiple sub-groups of parameters is a more conservative approach compared to a
single DOE that varies all the parameters at once. When all the parameters are evaluated
together, a significant response caused by one parameter may be canceled out by opposing
variations due to another parameter. The other advantage of multiple evaluations of smaller
sized DOEs is that the most sensitive parameters are highlighted.
Deviations from Nominal Case
The nominal case uses all input parameters at their nominal or best-estimate values for
parameters that are constant (e.g., MSL pipe diameter); the sensitivity range for these parameters
is usually governed by tolerances or measurement uncertainties. For parameters that may be
varying over the course of an operating cycle (e.g., moisture fraction upstream of the dryer), the
nominal value represents an average value over the cycle, with sensitivity range determined by
expected range of variation over the course of the cycle. The nominal PBLE calculations are
performed following the guidelines outlined in Section 4.4. [[
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'I4.5.1.1 Vessel/f
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]] prior to performing the plant-specific sensitivity evaluations.
4.5.1.2 ff 11 Sensitivity Evaluation
Once all the necessary [[ ]] have been pre-computed, the overall sensitivity in the
PBLE loads can be evaluated.
[[
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]] The experiments listed in Table7 were used to study the [[
Table 7 Experiments for.[
4.5.2 Generic Sensitivity Assessment
Generic bias and uncertainty values for the [[ are established by the PBLE
qualification benchmark comparisons in Section 3.2. Generic bias and uncertainty values for the
[[ ]] are established by the PBLE qualification benchmarks in Reference 1 and
Section 3.3 of this LTR supplement.
For plant-specific applications of the PBLE, the generic bias and uncertainties established by
these benchmarks can be applied to the load definition provided the [[
]] values presented in Tables 9a and 9b. This approach will assure that any
potential under prediction in the plant-specific load definition will be bounded by the generic
benchmark bias and uncertainty.
4.5.2.1 QC2 [[ 1] SensitivityAssessment
The following summarizes the results of the sensitivity assessment addressed in Appendix G and
recommendations for the application of the PBLE model for use at other BWRs:
ER
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The major causes of uncertainty in the PBLE loads are the [[
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4.5.2.2 SSES f[ 11 SensitivityAssessment
Appendix H documents the sensitivity assessment for SSES using [[
4.5.3 Plant Specific Application Methodology
The QC2 benchmark deviation from measured data (bias and uncertainty) is covered in the
benchmark section (Section 3.2.2). The bias (Equation (48)) indicates any [[
cr]]conditions are summarized asThe bias for the four QC2 benchmark [[
shown in Table 8a. [[
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Table 8a PBLE with [I II - Mean Bias and Uncertainty
[[I- I
I* I +
I* -I +
F I +
Table 8b summarizes statistical data for the two QC2 benchmarks using [[
1]presented in Section 3.3 of this report. [[
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Table 8b PBLE [I ]] - Mean Bias and Uncertainty
Using [[ ]], the maximum and minimum bias and
uncertainty results from Appendix G are summarized in Table 9a below. The values in Table 9a
show the results for the limiting frequency band (out of all the bands) for each parameter. Based
on these results, [[
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Table 9a PBLE with [[ 11 - Maximum and Minimum Bias and
Uncertainty
Using Er ] the maximum and minimum bias
and uncertainty results from Reference I and Appendix H are summarized in Table 9b below,
again showing the limiting frequency band for all frequency spans. Based on these results, [[
11Table 9b PBLE with [[ 11 - Maximum and Minimum Bias and
Uncertainty
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The sensitivity studies performed in Appendix G, Appendix H and Reference I were
]] The results for
the PBLE using are summarized in Tables 10a
and 10b. Tables lOa and 10b
Therefore, it is concluded that these
For plant-specific applications, the applicable range for each of these parameters will be
determined and a plant-specific sensitivity assessment will be performed.
This approach will ensure that the
plant-specific PBLE load definition predictions are sufficiently conservative.
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Table 10a PBLE [[ 1] - Bounding Sensitivity Assessment Results
Sensitivity Study Results using [[ Minimum Deviation
Er ______________________________________]]_
Table 10b PBLE 14 ]] - Bounding Sensitivity
Assessment Results
Sensitivity Study Results using [[
Minimum Deviation
lI ___________________________
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5.0 CONCLUSIONS
The Plant Based Load Evaluation methodology for plants with either [[]] is available to predict dryer pressure loads and their associated
bias and uncertainty.
The PBLE incorporates a [[
]1
The PBLE technique for determining dryer loading with [[
]] From comparison between measurements and projections, the PBLE predicts good
frequency content and spatial distribution. The SRV valve resonances are well captured.
The PBLE methodology presented in this report has two strengths:
* Accurate predictions of MSL phenomena occurring downstream of the MSL sensors:
valve whistling (SRV/branch line) and broadband excitations (venturi, MSIV turbulence);
* Modeling of vessel hydrodynamic phenomena through [[
]]
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6.0 REFERENCES
[1] NEDC 33408P, Revision 0, ESBWR Steam Dryer - Plant Based Load Evaluation
Methodology, GE Hitachi Nuclear Energy, February 2008
[2] U.S. Nuclear Regulatory Commission, Regulatory Guide 1.20 Revision 3, March
2007, "Comprehensive Vibration Assessment Program for Reactor Internals During
Preoperational and Initial Startup Testing. "
[3] MATLAB ®, Copyright 1984-2008, The MathWorks, Inc.
[4] SYSNOISE® Revision 5.6, LMS International, Users Manual Revision 1.0, March
2003.
[5] A.F. Seybert and D.F. Ross, Experimental Determination of Acoustic Properties
Using a Two-Microphone Random-Excitation Technique, J. Acous. Soc. Am., Vol 6 1,
No. 5, May 1977.
[6] J.Y. Chung and D.A. Blaser, Transfer Function Method of Measuring In-Duct
Acoustic Properties, I. Theory, J. Acous. Soc. Am., Vol. 68, No. 3, September 1980.
[7] M.G. Jones and P.E. Stiede, Comparison of Methods for Determining Specific
Acoustic Impedance, J. Acous. Soc. Am., Vol. 101, No. 5, May 1997.
[8] M.G. Jones and T.L. Parrott, Evaluation of a Multi-Point Method for Determining
Acoustic Impedance, Mech. Syst. Signal Proc. 3, 15-35, 1989.
[9] W.T. Chu, Impedance Tube Measurements - A, Comparative Study of Current
Practices, Noise Control Eng. J.37, 37-44, 1991.
[10] M.L. Munjal, Acoustics of Ducts And Mufflers with Application to Exhaust and
Ventilation System Design, John Wiley and Sons, 1945, 1987 Edition.
[11] S.H. Jang and J.G. Ih, On the Multiple Microphone MethodJbr Measuring In-Duct
Acoustic Properties in the Presence Of Mean Flow, J. Acous. Soc. Am., Vol. 103, No. 3,
March 1998.
[12] P.M. Morse and K.U. Ingard, Theoretical Acoustics, McGraw-Hill, New York,
1968, p.519.
[13] W. Wagner et al., The IAPWS Industrial Formulation 1997for the Thermodynamic
Properties of Water and Steam, ASME J. Eng. Gas Turbines and Power, 122, 150-182
(2000)
[14] V. Petr, Wave propagation in Wet Steam, Proc. Instn. Mech. Engrs Vol 218 Part C
2004, p 871-882.
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[15] U. Ingard and V.K. Singhal, Sound Attenuation in Turbulent Pipe Flow, J. Acous.
Soc. Am., Vol. 55, No. 3, March 1974
[ 16] American Society of Civil Engineers (ASCE), Nomenclature for Hydraulics, 1962,
or any fluid dynamics textbook.
[17] H. B. Karplus, Propagation of Pressure Waves in a Mixture of Water and Steam,
Armour Research Foundation of Illinois Institute of Technology, United States Atomic
Energy Commission contract No. AT (11-1) 528, ARF No. D132A13, 1961
[18] GE-NE-0000-0044-2240-01, "Quad Cities Unit 2 Replacement Steam Dryer,
Vibration Instrumentation Program, Plant Startup Test Report"
[19] Not Used
[20] L.E. Kinsler, A.R. Frey, A.B. Coppens, J.V. Sanders, Fundamentals of Acoustics,
Fourth Edition, John Wiley and Sons, 2000.
[21] E-NE-0000-0037-1951-01, Y. Dayal, Quad Cities Unit 2 Nuclear Power Plant,
Dryer Vibration Instrumentation Uncertainty, Revision 0, April 2005
[22] U.S. Nuclear Regulatory Commission, NUREG-0800, Revision 3, March 2007,
Section 3.9.2, "Dynamic Testing and Analysis of Systems, Structures and Components."
[23] U.S. Nuclear Regulatory Commission, NUREG-0800, Revision 3, March 2007,
Section 3.9.5, "Reactor Pressure Vessel Internals."
[24] GEH 26A7374, Rev. 1, April 2008, DRF 0000-0072-9808.
[25] Wylie, Streeter, and Suo, Fluid Transients in Systems, Prentice Hall, 1993.
[26] Haaland, SE (1983). "Simple and Explicit Formulas for the Friction Factor in
Turbulent Flow". Transactions ASVIE, Journal of Fluids Engineering 103: p 89-90.
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APPENDIX D QC2 BENCHMARK PSDS: [ fl EPU
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APPENDIX E SSES BENCHMARK PSDS [[ 11 EPU
(PBLE from []
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APPENDIX F SSES BENCHMARK PSDS [[ 11 EPU
(PBLE from [[ 11)[[E
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APPENDIX G QC2 SENSITIVITY ASSESSMENT
G.1. VARIATIONS IN PBLE INPUT PARAMETERS
Table 11 provides the [[parameters.
Table 11 [[
]] for all the input
11
1-
-I-
1-
[[I
1]
1-
[[
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G2 STEP 1 - PREPARATION OF FRF SETS
[[
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11 in View of Sensitivity AssessmentTable 12 [[
It
I t
4 t -~ ±
4 4 -4- ±
4 4
4 -4- -4
+ 4 + .4
+ 4 + .4
+ 4 + .4
4 4 + .4
4 4 + .4
4 4 -4- .4
1]1
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Figure 29 FEM mesh Upstream of the Dryer Showing the Regions
with 11 11
C.3. STEP 2 - SENSITIVITY IN PREDICTED DRYER PRESSURES
As described in Section 4.5.1.2, DOEs are run for all parameters in Table 11. For the sensitivity
due to uncertainty [[ ]], the four analysis cases of Section 4.5.1.2 are
considered. Deviations are calculated using the Equations (52) and (53) in Section 4.5. 1. The
results presented below in Table 13 are either detailed (all DOE combinations) or summarized
(maximum and minimum deviations), which is more appropriate e.g.
The most
significant deviations are highlighted in violet.
The impact of changes in
G4 RESULTS
11
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Table 14 provides a summary where the sensitivity assessment results for
The maximum absolute
positive (+) and negative (-) bias from the sensitivity results in Table 13 was used in this
summary. This summary demonstrates that with
The results in Table 13 show that
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The results in Table 13 also show that [[
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NEDO-33408 Supplement I
Non-Proprietary Version
Table 13 Sensitivity to Input Parameters of PBLE from [I
(Deviations are expressed in %)
11 - QC2 EPU Test Condition
N - N - * - N - N - N - N - S - S - I - N - N - S - S - N - N - N - N - N - N -
Frequency Band
(Hz) (->)
Input parameters
"C0 -
00 r~
'C
(N
'c
00
'IT
'C'CN
0I-
0000
C.,
0~00
'C7~
CD
00(N
N N
00 00 00
T - * - N - - N - N - I -
- - - { - N - N N N - - N - N -
-I-I- - I - * - ---- I - I - * - I - I - I -
i - i - i - i - i - - i - - i - I - I - I - I -
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requency Bn '0 d "I 0 00
Cl r~ '0 r- 00 00 0 l'
Frequency Band 00 00 0.7 l ~ '00 e l00 0 0 C Cl M~ '0 r 00 00
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NEDO-33408 Supplement 1
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O0 C, 00 kn or 00 D M 00 00 00- C r~ ~ W)r 00 00 O l' I
Frequency Band I I I I I00 I l 00 00 00 Cl4 Clý'C-~0C
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P Y ! ! P P q00
Frequency Band0
'C'CCl
ClCl
00C 4
'C
00
00
00
O C Cl 00 W) Cl4 2 Sr- 00 00 0N C
r-I I 0'C N 00 00 '
00n 00 00 00
In V% "
I II
I* I* t I* I* I
- k - h - h - I I - I - I - h - I - I - I - I - h - h - I - h h - h - h -
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NEDO-33408 Supplement I
Non-Proprietary Version
p - p - - - Y - P - P - Y - Y - ~ - P - P - P - ~ - ~ - S - S - S - S - S -Cl
Frequency Band00 rqC 00 00 00
-~ r Ottol
NO
NON
0N
Cl 0000
00 00
0
NO
0
0N
00 00
I I I I I I I I I I I I
II I
Note: Most significant deviations are highlighted with violet shading.
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NEDO-33408 Supplement 1
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Table 14 Sensitivity of PBLE for Variation in [[ 11 - QC2 EPU Test Condition
(Deviations are expressed in percent)
Frequency Band 0 I - I I I - ,c c0 - 00 -
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NEDO-33408 Supplement 1
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APPENDIX H SSES SENSITIVITY ASSESSMENT
This section presents a sensitivity assessment for [[ ]], using the PBLE [[
]] The related benchmark is presented in Section 3.3.1.
H.I. VARIATIONS IN PBLE INPUT PARAMETERS
Table 15 gives the [[
parameters.
]] the input
11Table 15 R[
EfI 4
I I- 4
I I- +
I I- +
The choice of input parameters is influenced by previous studies. [[
H.2. SENSITIVITY IN PBLE PREDICTED DRYER PRESSURES
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NEDO-33408 Supplement I
Non-Proprietary Version
Only the parameter or group of parameters under study is modified. Other parameters remain attheir
J[ ]] in Table 16 are
calculated, the are used.
The PBLE is run for in Table 16 and deviations from the nominal case are
reported in Table 17. The deviations are calculated as described in Section 4.5. 1.
Table 16 11 11 in View of Sensitivity Assessment
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NEDO-33408 Supplement 1
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Table 17 Sensitivity to Input Parameters of PBLE - [[
(Deviations are exoressed in %)
II Test Condition
- - - - - Y Y - Y - * I - I - Y - Y - Y - - I - I - - Y - F -
Frequency bands
IHzI (-f)
Input Parameters
(1)
0
0
0
C
00
C
0
C
0
.1. - - - I -
0~0~~
0
"0
kn z00 CN0
C
00
e'l
0, ~f)
C
0~~
C
00
C
0
10 0~
C
00
C,
eqi
r4C~
0,
Cl'-C
-4 -~-~-6 - I-i-i - - - I -
I- 1--1~ I-
4- + + ___ 4 + 4 4 4 4 + 4
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Frequency bands M[Hz00 r 4 e q en tn 0 et- 0 • .as 0. e- r4
Input Parameters "h - • • • • ' -N N \ -
Ct)
Note: Most significant deviations are highlighted with violet shading.
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Non-Proprietary VersionH.3. CONCLUSIONS
Based on this assessment
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NEDO-33408 Supplement 1
Non-Proprietary Version
APPENDIX I CORRELATION OF STRAIN GAGE DATA TOACOUSTIC PRESSURE EXPERIMENTAL TESTING
1.1. INTRODUCTION
This section summarizes the analysis of strain gage and pressure transducer data from the GEH
test performed in January 2008. The GEH test used high-pressure air to test the [[]] to
measure the acoustic pressure inside the pipe. Pressure from strain gages is used in the
benchmarking of the PBLE. This report compares the response of the gages and pressure
transmitters and presents an assessment of the bias and uncertainty associated with the use of
strain gages for measuring acoustic pressure inside a pipe.
1.2. EXPERIMENTAL SETUP
[[
1]Figure 30 Photograph of Test Section.
Er]] as seen in Figure 31, with the drawing dimensions presented in Figure 32.
Each station consists of 8 strain gages orientated in the hoop direction equally spaced
circumferentially around the pipe as shown in Figure 33. There was a corresponding pressure
transducer mounted [[
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A
photograph of the test section and the downstream piping system is presented in Figure 34, with
a schematic of the piping system is shown in Figure 35.
A
more technical explanation is included in Section 1.3.
11
Figure 31 Schematic of Experimental Setup for Strain Gage/Acoustic Pressure Test.
11
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11
Figure 32 Drawing Dimensions for Test Article.
1]Figure 33 Strain Gage Orientation and Numbering.
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Figure 34 Piping Layout and Supports.
[I
Figure 35 Schematic of Piping Layout and Supports.
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Non-Proprietary Version1.3. CONVERSION OF STRAIN GAGE DATA TO PRESSURE DATA
[[
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The modulus
of elasticity for the pipe as a function of temperature is presented in Table 19. The strain to
pressure conversions (Table 20) are performed with the
]] from each location.
Table 18 Pipe Thickness as a Function of Azimuth, for both Strain Gage Locations.
Table 19 Modulus of Elasticity of A106 GrB Pipe
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Table 20 Calculation of Pressure to Strain Ratio
1.4. DESCRIPTION OF TEST EQUIPMENT AND DATA SETS
The main focus of the testing was for evaluating
over the suite of test runs.
There were three data acquisition systems used, [[
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NEDO-33408 Supplement I
Non-Proprietary Version1.5. DESCRIPTION OF TEST DATA
Out of the [[ ]], there were three test cases that included temporal strain pressure
and accelerometer data necessary for assessing strain gage performance. The three test cases
were:
Table 21 Test Cases
SG Test Name Test Name
Case 1 t3lnt2sl
Case 2 t3 lr2t2s3
Case 3 t8bl 80trl
The following three figures depict the transient flow (Figure 36), pressure (Figure 37) and
temperature (Figure 38) data during these tests. Each test included a slow up and down ramp in
flow velocity. [[
An accumulator was used as the air source for the test.
The air was passed through a heat exchanger to provide temperature moderation. Due to the
large volume air used during the test there was still a decrease in temperature over the period of
each test. Flow control valves upstream and downstream of the test assemblies were adjusted to
maintain a system pressure of approximately 300 psia and to provide the desired flow ramps.
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[1
Figure 36 Flow as a Function of Time for the Three Tests.
11
Figure 37 Pressure as a Function of Time for the Three Tests.
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Figure 38 Temperature as a Function of Time for the Three Tests.
The air pressure and flow variations noted in Figure 36 and Figure 37 will have
The air temperature in the pipe dropped less than 40F during the tests. The room temperature
remained constant at approximately 70F.
11
1.6. ANALYSIS OF RESULTS
Figure 39 and Figure 40 depict the individual strain gage signals and the averaged signals at each
location. The strain has been converted to pressure using the conversion factors shown in Table
20. In these plots, strain gages on opposite sides of the pipe are plotted in the same color in
dashed and solid lines. [[
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Figure 39 SG1 Location, Individual Strain Gage Signals Case 1.
Figure 40 SG2 Location, Individual Strain Gage Signals Case 1.
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NEDO-33408 Supplement 1
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11
For Case 1, Figure 41 provides a power spectral density plot for PT1, PT2, and coherence
between PT1 and PT2. Figure 41 also provides the PSDs for SGI, SG2, and coherence between
SG1 and SG2 for the same time interval. [[
1]]
Figure 42 include PSD plots and coherence data for PTI, PT2, and PT3. This data indicates that
two of the three transmitters have good coherence at acoustic peaks.
Er
1]
Er
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Figure 41 PT and SG ([[ 1]) PSD and Coherence Data (Case 1).
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11
1]Figure 42 PT1, PT2, PT3 PSDs and Coherence Data (Case 1).
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Non-Proprietary Version
Figure 43 provides a comparison of the PSD data for the strain gage and adjacent pressure
transmitter. [[]] Therefore the maximum normalized value is 1. The coherence shown
is between the SG and adjacent PT.
In general there is good coherence between the SG and adjacent PT at acoustic peaks. [[
E]]
Figure 43 Comparison of PT and SG ([[ 11) PSD and Coherence Data.
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]] plot in Figure 45.
Figure 45 [[
11
Figure 46 represents a comparison of the [[
Figure 47 represents a comparison of the PT data compared with the [[
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LI
Figure 46 Pressure Based on |[
1]
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gr
Figure 47 Pressure Based on PT Sensor II
[[E
]].are identified in Figure 48.
[1
1]Figure 48 depicts the results for Case 1. This includes both the [[
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NEDO-33408 Supplement 1
Non-Proprietary Version
If all frequency bands are combined, the resulting error for all frequency and time intervals the
error results for are:
Summary of Error for all Frequency and Time Intervals
Test Case No. Mean Error STD Error
1 5% 38%
2 15% 35%
3 0% 33%
[[
1]Figure 48 Test Case 1: Error in Peak Pressure Response from SG Versus PT.
Figure 49 provides a plot of the error associated with the PT data. In this figure, the RMS value
for the PT1 and PT2 is compared with the RMS value based on the [[
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NEDO-33408 Supplement 1
Non-Proprietary Version[[I
Figure 49 Test Case 1: Error in RMS as a Function of Frequency Band Pressure Response[II]
Figure 50 and Figure 51 compare the RMS response of pressure from the [[
]] Figure 52 through Figure 55 provide these same plots for
test Cases 2 and 3. For all frequency intervals of Cases 1, 2, and 3 (Figure 50, Figure 52, and
Figure 54), the [[
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NEDO-33408 Supplement I
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Figure 50 Case 1: Error in RMS as a Function of Frequency Band Pressure Response fromII ]
1]
Figure 51 Test Case 1: Average RMS as a Function of Frequency Band Pressure Response
II ]]
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NEDO-33408 Supplement I
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Figure 52 Test Case 2: Error in RMS as a Function of Frequency Band Pressure ResponseII ]]
l[[
Figure 53 Test Case 2: Average RMS as a Function of Frequency Band Pressure Response
II 11
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F]Figure 54 Test Case 3: Error in RMS as a Function of Frequency Band Pressure Response
[[I
1]Figure 55 Test Case 3: Average RMS as a Function of Frequency Band Pressure Response
II 1]
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NEDO-33408 Supplement 1
Non-Proprietary Version1.7. PBLE DRYER LOADS BIAS USING SG SIGNALS FOR UNSTEADY MSL
PRESSURE
1.8. PREDICTED RESPONSE AS FUNCTION CIRCUMFERENTIAL SGS USED INAVERAGING
The error assessments done to this point have been performed using the [[from the 8 strain gages at location SG1 and SG2. [[
There were 19 combinations of [[
summarized in Table 22:
]]used in this investigation. These are
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Table 22 Strain Gages Combinations used in Strain Gage Combination Study
SGlcombl=[1 2 3 4 5 6 7 8]; SG2combl=[9 10 1.1 12 13 14 15 16];
SGlcomb2=[1 3 5 6 7 8]; SG2comb2=[9 11 13 14 15 16];
SGlcomb3=[1 3 5 7]; SG2comb3=[9 11 13 15];
SGlcomb4=[2 4 6 8]; SG2comb4=[10 12 14 16];
SGlcomb5=[1 3]; SG2comb5=[9 11];
SGlcomb6=[1 2 3 4 5 6 7]; SG2comb6=[9 10 11 12 13 14 15];
SGlcomb7=[1 2 3 4 5 6]; SG2comb7=[9 10 11 12 13 14];
SGlcomb8=[1 2 3 4 5]; SG2comb8=[9 10 11 12 13];
SGlcomb9=[1 2 3 4]; SG2comb9=[9 10 11 12];
SGlcomblO=[1 2 3]; SG2comblO=[9 10 11];
SGlcombll =[1 2]; SG2combl 1=[9 10];
SGlcombl2=[1]; SG2combl2=[9];
SGlcombl3=[2]; SG2combl3=[10];
SGlcombl4=[3]; SG2combl4=[ 11];
SGlcombl5=[4]; SG2combl5=[12];
SG1combl6=[5]; SG2combl6=[13];
SG 1 comb! 7=[6]; SG2combl 7=[14];
SG1combl8=[7]; SG2combl8=[15];
SGlcombl9=[8]; SG2comb19=[16];
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Figure 56 summarize the error in peak response in
11
Figure 56 Error in Peak Response as a Function of SG [I
Frequency and Time Intervals)
] ] (All
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Table 23 [[ II
Note: [[
Figure 57 through Figure 59 provide PSD comparisons of pressure calculated using [[
]] This is also reflected in Figure 60
through Figure 62 that provide the [[
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II
Figure 57 8, Strain Gage [[ 1]
lI
Figure 58 4 Strain Gage II
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Figure 59: 2 Strain Gage I[
1[
Figure 60: Frequency Band [[
ll
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II
Figure 61: Frequency Band [[11
[1
1]Figure 62: Frequency [I 1]
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1.9. STAIN GAGE ARRANGEMENT AND THE IMPACT TO PBLE LOADS
In calculating acoustic pressure [[
pressure predictions commensurate [[is a substantial increase in error [[
]] provides
]] There
1.10. REFERENCES
I-1) Advanced Strength and Applied Elasticity, by Ugural and Fenster, Elsevier, 1975
1-2) Theory and Design of Modem Pressure Vessels, Second Edition, by John F.
Harvey, Van Nostrand Reinhold, 1974
1-3) A. D. Pierce: Acoustics. An Introduction to Its Physical Principles and
Applications. Acoustic Society of America. 1994.
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APPENDIX J ACOUSTIC FINITE ELEMENT PROGRAMREQUIREMENTS FOR PBLE
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