meeting agenda and handouts regarding meeting concerning … · 2010. 9. 26. · a-l.e~cv-.[il...

NRC FORM 658 U.S. NUCLEAR REGULATORY COMMISSION (9-1999)

TRANSMITTAL OF MEETING HANDOUT MATERIALS FOR IMMEDIATE PLACEMENT IN THE PUBLIC DOMAIN

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DATE OF MEETING

The attached document(s), which was/were handed out in this meeting, is/are to be placed |I/2IQ1 C in the public domain as soon as possible. The minutes of the meeting will be issued in the

near future. Following are administrative details regarding this meeting:

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Plant/Facility Name W-/,

TAC Number(s) (if available) I_/ _

Reference Meeting Notice - 1 0 C C. Purpose of Meeting (copy from meeting notice)

Tco CAS cowJ-ZA-I ir 1-?AMC-TKhf'

NAME OF PERSON WHO ISSUED MEETING NOTICE TITLE

A-L.e~cv-.[IL OFFICE

DIVISION

BRANCH

Distribution of this form and attachments: Docket File/Central File PUBLIC

Q ~~67 JNRC FORM 658 (9-1999) This form was designed using InFormsPRINTED ON RECYCLED PAPER

AGENDA for 11/22/1999 Public Meeting Degradation and Failure Characteristics

of NPP Protective Coatings

USNRC Headquarters Rockville, Maryland Room T 10 - A1/F3

9:00 - 9:15

9:15 - 9:45

9:45 - 10:30

10:30 - 10:45

10:45 - 12:00

12:00 - 1:00

1:00- 2:15

2:15 - 3:30

3:30 - 4:30

Introduction and General Overview

Savannah River Technology Center (SRTC) Project Activities Overview

Mechanical and Physical Properties

Morning Break

Modeling Coating Degradation/Failure LOCA (DBA) Testing Results

Lunch Break

Inorganic Zinc (IOZ) Primer Insights

Industry Coatings PIRT Panel Findings

Serkiz

SRTC

SRTC

SRTC

SRTC

Cavallo

Concluding Discussions (e.g. question/answer)

Notes:

STRC's morning presentations will describe findings obtained for a Coatings System comprised of an epoxy-phenolic top coat applied over an epoxy phenolic primer applied over a steel substrate). This system is identified as a SRTC System 5 which corresponds to an industry PIRT designation as System D [4]. A coatings systems identification and cross referencing is provided in this handout.

Inorganic zinc primer insights (afternoon session) will be derived from examination and tests of SRTC System 6 and NPP coating samples received.

Contact: Aleck Serkiz, USNRC 301-415-6563 [email protected]

Introductory Remarks - SRTC Coatings Research

Research Purpose:

Investigate NPP containment coatings to determine coatings system failure mechanisms, estimated time to failure and coating debris characteristics (E.g. failed material composition, geometry, size and distribution)

The program was initiated in response to NRR User Need Letters dated 12/7/95 and 6/2/97. Failure and delamination of "qualified"

coatings under normal plant operating conditions and further concerns related to failure of coatings during the post-LOCA period were the principal reasons for initiating Class I protective coatings research at the Savannah River Technology Center (SRTC) in July 1998.

Approach:

SRTC's program is designed to provide insights into post-LOCA Class I coatings degradation or failure, mechanisms that could lead to failure and failed coating debris characteristics. The results will provide insights for coating debris characteristics for use in GSI-191, PWR Sump Clogging.

Purpose of Meeting:

This public meeting provides another opportunity to explain and to better understand SRTC's program activities, provide results obtained to-date, describe interaction with the industry coatings PIRT panel, describe PIRTs performed and obtain feedback for consideration to incorporate into future program activities.

Contact: Aleck Serkiz, USNRC 301-415-6563 [email protected] -2-

Introductory Remarks SRTC Coatings Research (continued)

Why Needed ?

1) Failed coatings represent undesirable debris source which could impact PWR sump or BWR ECCS stainer performance.

2) NRR 6/2/97 user need letter requested:

"'Debris generation testing of coatings that are likely to fail during an accident to determine the timing of the coating failure during an accident (e.g. minutes, hours, days) and the characteristics of the failed coating debris (e.g. chips, large strips, particulate)."

3) Clear evidence of failure of qualified coatings during

"design life" plant operating conditions ( see GL 98-04, "Potential for Degradation of the Emergency Core Cooling System and the Containment Spray System After a Loss-ofCoolant Accident Because of Construction and Protective Coating Deficiencies and Foreign Material in Containment,"

July 14, 1998 and enclosed photos of examples of "qualified" containment coating failure).

Contact: Aleck Serkiz, USNRC 301-415-6563 [email protected] -3-

Example of a "Qualified" Containment Coating Failure

(Phenoline over CZ-11 on Steel)

Example of a "Qualified" Containment Coating Failure (Phenoline over CZ-11 on Steel)

Coating Systems Identification & Cross Reference

Generic Description

Steel Epoxy-phenolic over inorganic zinc

Concrete Epoxy-phenolic over surfacer

Steel

Steel

Steel

Steel

Steel

Poly-modified epoxy over inorganic zinc

Poly-modified epoxy over epoxy-poymide

Epoxy-polymide over epoxy-polymide

Inorganic zinc

Epoxy-phenolic over epoxy-phenolic

Steel Epoxy over inorganic zinc

Concrete Epoxy over surfacer

Concrete Epoxy-phenolic over epoxy-phenolic

Concrete Epoxy over epoxy

Contact: Aleck Serkiz, USNRC 301-415-6563 [email protected]

Substrate SRTC System Identification

Coating Products

Phenoline over CZ-1 1

Phenoline over Surfacer

Amercote 90HS over Dimecote 9

Amercote 90HS over Amercote 370

Amercote 370 over Amercote 370

Dimecote 9

Industry PIRT Identification

A [1]

E [5]

1

2

3

4

5

6

B [2]

C [3]

F [6]

G [7]

H [8]

-6-

D [4]

SRTC NPP Protective Coatings Research Program Overview

Aleck Serkiz, USNRC 301-415-6563 [email protected] -7-

Contact:

Degradation and Failure Characteristics of NPP

Degradation and Failure Characteristics of NPP Containment Protective Coatings

Project Overview

Savannah River Technology Center

Presentation at NRC Public Meeting, NRC HQ November 22, 1999

3SRTC 11/22/99

Project Overview

9 Testing and Analysis Activities to: - Investigate Service Level I coating performance in non-aged

and aged conditions under temperature/steam conditions in containment during DBA

- Utilize experimental testing and analytical modeling approach to predict coating performance under postulated DBA conditions

- Identify failed coating characteristics (debris source term)

* Address Phenomena Important to Cause Coating Failure (Identified by Industry PIRT Panel)

aSRT¢ I 7P21".

Task Logic Diagram

1112Z,19

I I

Coating Properties

"* Initial Set of Mechanical / Physical Properties from Literature

"* Measure Mechanical Properties

, Tensile and Adhesion Energy Data at Temperature and Wetness Conditions

>, Unaged and Aged Conditions > Import Data into FE Model

"* Measure Physical Properties » Heat Capacity; Thermal

Conductivity; Density; and Thermal Expansion Coefficient

> Import Data into FE Model

L :SRTC 1112219

Test Specimens System 5 Example

"* 4"x6" Coated Specimens

"* Properly Applied and with Intentional Defects

* Intentional Defects: >> Initial Delamination

Under Coating (Type 1) >> Hole Through Coating

to Substrate (Type 2)

EISRTC 1112219

Type 1 Defect

Type 2 Defect

Material Property Definitions

* G (in-lb/inA2): Adhesion Energy for Delamination o G- Applied (calculated) )> G- Material (measured)

* Adhesion Strength (lb/inA2): Measure of Resistance of Coating System to be Pulled from Substrate. Combines Tensile and Adhesion Energy Behavior.

a a: Coefficient of Thermal Expansion * E: Elastic Modulus (Young's Modulus)

a a ultimate: Failure Stress e E max: Failure Strain

LSRTC 112Z/9

Measurement of Material G-Value

1ISRT¢

Analytical Models to Predict Failure

"* Develop Models for Predicting Coating Failures (i.e., blisters, cracks, chips)

>> Mode 1: Blistering, then Delamination, then Cracking

>> Mode 2: Cracking, then Delamination

"* Approach >> Input Material Properties and Environmental Conditions

»> Calculate Thermal-Induced, Pressure-Induced Loadings

» Calculate Stresses, Strains, and Applied G

>> Compare with DBA Test Results

EISRTC 11f221•9

I __1

Mode 1 Model (Blistering/Delamination/Cracking)

Model Failure Criteria:Gaterja -< Gapplied; and

-material failure - applied

111221.99

Mode 2 Model (Cracking/ Delamination)

Model Failure Criteria:Gmaterial _• Gapplied; and

Ematerial failure -- Capplied

13RT9

DBA Testing in Environmental Test Chamber DBATest-101W599

System 5 - Type 2 Defect Amercoat 370lAmercoat 370

"* D3911 Testing (PWR) '> Abbreviated Hold-Times

(- 3 hours)

> Full Run Time (- 5 days)

"* Plant-Specific Testing >> Calculated Pressure vs.

Time Profile

> Used to investigate effects of temperature/pressure pulse and reversal

Plant "Pulse" T/P Profile '_300 "100

'70. Fcdt T .. 70 20( 40°•

10

0 0 0 2 5 7 1020406080 SRT¢ Tln- (seq) S RTC

1112V99

Insights into Failed Coating Characteristics

"* Characterization Methods >> Optical and SEM Microscopy

>> EDS for Elemental Chemical Analysis

>> IFR for Compound Information

>> XRD for Compound Analysis

"* Apply to:

>> Laboratory Specimens

>> NPP Containment Specimens

>> Non-aged and Aged

>> Pre- and Post-DBA

Example of IOZ Characterization

I 2SRT1 11/'22/99

Presentations for Project Insights

* Vertical Slice of Integrated Project Activities to Evaluate Failure Potential of Coating System 5 (Industry PIRT "System d")

> System 5: Epoxy/Epoxy/Steel >> Material Property Testing Results > Modeling Results » DBA Testing Results

* Insights Concerning IOZ Coating Materials

1,SRT¢ 17122199


Evaluation of Coating System 5 Properties Modeling

DBA Testing



11/2ZI99

Task Logic Diagram

I

Insights from Coating Performance Predictive Modeling Model Verification "No Failure"

of Coating Performance Ruptured Blstering -Large Chips

- Fine Particulates

11122199

I

Properties

* Mechanical ) Adhesion (Pull) Test » Adhesion G-Value (Defect 1) » Tensile (Free Film) » Cohesion (Free Film Fracture)

* Physical » Free Films of Amercoat ® 370 > Coefficient of Thermal Expansion » Thermal Conductivity > Specific Heat > Density

SJRTC 11/2"m

Adhesion Test Method (Pull Test)

* Application to Adhesion Strength Measurement

* Based on ASTM Methods D 5179-98 "Measuring Adhesion of Organic Coatings to Plastic Substrates by Direct Tensile Testing" and D 4541-95 "Pull-Off Strength Using Portable Adhesion Testers"

"* Accurate Extension Measurement Required: Extensometer

"* Temperatures up to 300'F Dry and 200'F Wet, Derived from DBA Profile

" Araldite® 2014 (250'F) and Cotronics 4525 (500'F) Epoxy

Adhesives

E SRTC '1/2 R1 T9 C9

Controlled-Temperature InstronTM Testing Machine

Provides for Testing at Desired Temperatures (100-300'F)

OSRTC 11/2z/99

Necessary for Alignment of Plate in Lower Grip [ISRTC 11/22199

Magnetically-Attached, Single-Arm Extensometer in Contact with Top of Puller

Provides Accurate Load-Line Displacement for Adhesion Pull Test And for Adhesion G-Value Test OSRTC

11/22/99

Adhesion Strength Test of System 5

System 5 Adhesion Pull Tests U(.arf Strength

700 iOOP 2770 pi Unaged 200F 545 psi

600 100OF Dro 300OF 390 psi

Dry 500 4,Aged 10OF

~400 Dry 0

200 2=XY'2 F320sF Aged Aged Wet Strength 100/7

Dry 1 !__ 100°F 1620 psi

0 .........t

0.000 0.002 0.004 0.006 0.008 0.010

Exte2s0o0 (inches)

Aged=Irradiated to 109 Rad [•$RTC

11222F99

System 5 Examples of Puller Fracture Surfaces

Pulled with gray AralditeTM adhesive Tested at 100*F, dry, unaged black Cotronics adhesive

[:SRTC

Introduce Defect 1 for Measurement of G-Value

"* Defect Size: 3/8"; 1/2" Diameter • _

"* Polytetrafluoroethylene Spray through Mask on Prepared Surface

"* System 5 Examples are for 1/2" Diameter

"* Test Similar to Pull Test M.

Using InstronTM

11SRTC 71/22/99

PTFE discs on steel cou

Measurement of Material G-Value

Puller

Adhesive ........"t- t ,"Coating

Substrate Crack Extension

Zero Adhesion -- (coating delamination) Defect (disc) in green in red

"1I/RT

Defect 1 Coupon Preparation

Flexible magnetic mask with 0.5 in. diam. Polytetrafluoroeth holes

pon [ISRTC IIY/22199

ylene spray

G-Value Test Results for System 5

System 5, Defect 1, Unaged, Dry, 38 deg C

200 ------------- - -------

180

160

4; 140 Secend Test

S120

100o Average G tei = 150 J/m 2

X•80 so 0 .. j60

40 20 Fi..• rst :Test 20

0 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01

Extension (inches)

IISRT¢r

System 5 Material Property Results (Unaged)

Mechanical/Physical Property Literature Value Measured Valued @ 100'F Modulus 380 ksi 580 ksi

Thermal Conductivity 0.17 W/m-K 0.7349 W/m-K

Volumetric Specific Heat 1050 J/kg-K 1.337 MJ/m3-K

Thermal Expansion Coefficient 1.56E-5 m/m-K 1.41E-4 m/m-K

Glass Transition Temperature 1490C 28°C

GunoL~,I -150 k J/m=

Density 1060 - 1400 kg/m' 2192 kg/m'

IISRTC 11/22/99

Modeling "* Develop Models for Predicting Coating Failures

(i.e., blisters, cracks, chips) "* Two Failure Modes Considered

>> Mode 1: Blistering, then Delamination, then Cracking

>> Mode 2: Cracking, then Delamination

"* Approach >> Synthesize FE Model and Mesh >> Import Mechanical and Physical Properties

» Calculate Thermal-Induced, Pressure-Induced Loadings

>> Calculate Stresses, Strains, and G-Applied » Failure Criteria Based on

Gmaterial • Gapplied; and aSRTC Ematerial failure -< eapplied

I 1K

11P21299

Finite Element Coating Model

" Build model for specific coating system (e.g., number of layers, specific coating layers, thicknesses, defect postulate)

"* Input mechanical and physical properties (with temperature and wetness dependencies)

"* Input time-dependent loading conditions (e.g., DBA temperature and pressure profile)

12SRT9 11,22199

System 5 Properties (Unaged) Used in Modeling

Thermal Properties for Transient Analysis

Amercoat 370 Thermal Properties (Thickness=l3 Steel

mils) Density (kg/mi) 2192 7801

Specific Heat 972.8 at 50 °C 473 eChantcal Properties for Stress Analysis (J/kg'K) 984.0 at 55 *C Anrwod 370 Cn w bo Suiab•mt

rnhkd-=3 n~its) 993.9 at 60 °C 4O37*37.88C

1004.0 at 65 oC Yaw&g's MýMus. E(MP.) 140a 93.3 *C 207[ O

1014.0 at 70 'C 7 at 14&9C

1023.0 at 75 'C Poisss Raio(v) 0.4 0.3

1032.0 at 80 °C ' tn 2WO 13xltr' 1041.0 at 85 °C a (rK) 1050.0 at 90 °C 1058.0 at 95 °C 1067.0 at 100 °C 1097.0 at 125 °C 1126.0 at 150 °C

Thermal 0.7349 at 37.8 °C 43 Conductivity 0.7783 at 93.3 °C

(W/m.K) 0.7830 at 148.9 'C SRM C '•T •912P

Modeling Results: System 5, Unaged, No Defects End of Heating (10 sec.) Hot Surface of Coating

Temperature Profile

Coating:

Top Layer

Stress Profile: Blue region =Compression

Coating Entirely

in Compression:

No Cracking

SSXRT¢.

SemlIk~ ~o iPZr9

Modeling Results: System 5, Unaged, No Defects End of Cooling (10,015 sec) Cool Coating Surface

Temperature Profile j

Stress Profile: Blue reeion = Compression

Coating Remains in Compression: No Cracking

17SRTC "12W9T~~d •u

I,

Results: System 5, Unaged, Type 1 Defect (1/2")

Defect without Vapor Pressure Loading

(Deflot Di.e.ter .112 Inch)

Gmat . 150.J1.2

0.01 0.1

200

180

160

40

2120

Do.

j. 80

"- 60.

40

20.

10 IsO 1000 Ices0 10t000 Time (sac)

Detect wvdthVaorressurea Load ing (Detect Diameter = 1/2 Inches)

02 seconds aft

20D -- - ---S. .... -/ . .. D I... ,,-;= .tl 1- 1- 1 1-- 1 L-eld ;-ISO /( .Die Diamele," - M, inche)

•120

1I00

.60

60

20DOela between 10010 and 10011

:00

Time (sec)

200

180

160

140

4O

,cooling

0 1 10 100 1000 10000 100000 Time (sac)

[35RT{ 11122199

Results: System 5, Unaged, Type 1 Defect (1/8")

200.. Defect with Vapor Pressure Loading

180•

(Defect Diameter = 1/8 inches) 160

S140 -E 120

* 60

40

20

0 I , ... ... i . L... ....

0 0 1 10 100 1000 10000 100000

Time (sec)

* Maximum Gapplied is below 150 J/m 2

t1SRT¢, S1/'221/99

4

Findings for System 5, Unaged

"* System 5 with Type I Defect w/o Pressure Will Not "Fail" in DBA Exposure

"* System 5 with Type 1 Defect w/ Pressure Will "Fail" in DBA with Rapid Cool-Down and Threshold Defect Diameter

"* System 5 with Type 2 Defect Will Not "Fail" in DBA

"* Blister Size No. 4 (-1/8") Not Likely to Fail Based on These Initial Insights

SSRT¢ý 1E/.2/

DBA Testing

"* Description of Mini-Environmental Test Chamber

"* System 5 Test Results - D3911 Profile (- 3 hours) and Rapid Heat-Up/Cool-Down > Type 1 Defect

>> Type 2 Defect

SSRTC 111221'9

Mini-Environmental Test Chamber

IOSRTC 11122199

Results

"* Abbreviated D3911 "* Unaged, Defect Type 1

"* Results >> No color change >> No chips > No fine particulate No Debris Source Term

OSRR

Results (CONT'D)

"* Abbreviated D3911 "* Unaged, Defect Type 2 "* No Chips

"* Some Corrosion Fines from Exposed Plate Surface

Pre-Exposure

Post-Exposure

S1SRT¢ 111221/99

DBA Temperature/Pressure Pulse

300 ...... .. . ... 100

250 so__ 9

Cavfty Temperature 80

70 200 60 S~60

6150 50

---- ------------------.. . -- 40 -1 0 0 .Pressure

E 1 / 30

20 50

I0

0 0 0 10 20 30 40 50 '0 70 00 50 00

Time (sec)

Plant-Specific T/P (MELCOR Analysis) Pulse TIP Profile in Mini-ETC

SOSRT¢,

11122N9

0 2 5 7 1020406080 T irre (sec)

Results (CONT'D) * Abbreviated D3911 * Aged, Defect Type 2 * Results:

"> Top Coat Color Change " No Chips

me rr 1 n Fin fr Ex osed Plate Surface

[ RTC 21/,2'99

Qý

Results (CONT'D)

"* System 5 Specimen: Response to DBA Pulse

"* Unaged, Defect Type 1

"* Small Holes Drilled through Coating at Defect 1 Sites

"* No Effect Observed

After DBA PulseBefore DBA Pulse

1lflC9

Findings, System 5- DBA Testing

"* No Chip Formation Under DBA Conditions for Unaged Coating for Either Defect 1 or 2

"* Corrosion Fines Form on Exposed Steel Surfaces

"* Model for Mode 1 and Mode 2 Behavior is Confirmed (Unaged)

SISRTC IIPZh 9 ~lv


Characterization of EpoxyPhenolic/IOZ Coating System



1SRTC 11122)i"Tddor(I~l

Outline

"* IOZ Used Extensively in NPP Containment >> Primer for many topcoats and multicoat systems »> Untopcoated where decontamination not required

"* Test Data & Analysis from NPP Failed CoatingPlant Chips (Phenoline® 305/CarboZinc® CZ11 Formulation)

"* Test Data & Analysis from SRTC Laboratory Coating Specimens (Dimetcote® 9 Formulation)

150RTC 11/22,/99

IOZ Product Description

"* CarboZinc® 11 (Carboline) - ethyl silicate inorganic zinc primer >> Old formulation (with asbestos) in process

> Current formulation (CZ-11SG) does not contain asbestos

"* Dimetcote® 9 (Ameron) - ethyl silicate inorganic zinc primer >> Dimetcote® 6 contains asbestos »> Dimetcote® 9 - no asbestos

[SRTC 11/22/99

Plant Chips - Epoxy-Phenolic/IOZ

*Phenoline® 305 Finish/ Carbo Zinc® 11 IOZ primer

*As-received condition; in-service for 15 years; severe disbondment

-Failure attributed to excessive IOZ thickness and improper recoat

[SRTC 11/22/99

Plant Chips - Epoxy-Phenolic/IOZ (CONT'D)

IVU9P l SS20 zi*1 9 10 111 34 20 21 22 4 4~ e V A 7 8

Epoxy-Phenolic Topcoat Inorganic zinc primer (Phenoline® 305 Finish) (Carbo Zinc® 11)

1SRT9 I1/2ZSI

Plant Chips - Epoxy-Phenolic/IOZ (CONT'D)

Edge View SEM (EP/IOZ) IOZ at - lOOX

OSRTC 11122199

Minor Coating Anomalies (Plant Chips of Phenoline® 305/CZ-11)

SEM edge view of Phenoline® 305/CZ-I I (- 30X)

Anomaly from Gas/Solvent Bubble

Edge view of anonialy (- 2000X)

IOZ Primer - Carbo Zinc® 11

Small Spherical Particles of Zn/ZnO [OSRTC 11/2Z/9"

1/SRT/ 11122199

DBA Testing of Plant Chips

Pre-DBA - 30 minutes int

* Video of Plant Chip Exposure to DBA

o DBA

aSRTC 11122199

Minor Coating Anomalies (CONT'D)

Surface of anomaly in Phenoline® 305 topcoat ( ~ 6000X)

[2SRTC 11/2mn•p• et•n.

Why Bi-Layer Chips Curl Primer

Topcoat

* Differential Expansion/Contraction

Strain at Topcoat: Eo = ln((r+Si +8d2)0 / L)

Strain at Primer: aj = ln((r+8i/2)0 / L)

Small Net Strain: Aa = Fo- Fj = (8j+ 8o)0 / 2L = 8/2r

* Volume Expansion of IOZ Attributed to Oxidation[SwRTC

1l/22IFf.

Post-DBA of Plant Chips w/IOZ Removed

Curling of Chips During DBA Nearly Eliminated with Single Layer System iiSRTC

11t22199

XRD Results: Zn/ZnO Content Change with DBA/Radiation

Zn Zn

St ZnO

ZnO

As-cured (79% Zn, 21%ZnO) Post-DBA/Irradiation (0.2x10 9 R @ 106 R/hr) (69% Zn, 31% ZnO)

1SRTC

Plant Chips: Post-Irradiation/DBA Results

Inorganic zinc primer Epoxy-phenolic topcoat

0.2 x 101 rads, then I hr @ 300*F steam (3X) 0.2 x 109 rads, then 1 hr @ 300'F steam (2X)

S1SRT9 I1/2_2S99

Application of Dimetcote® 9 to SRTC Laboratory Specimens

"* Carbon steel substrate, grade A36, 1/4" thick, 4" x 6" plates

"* Blasted per SSPC SP10, Near-White Metal Blast

"* Coatings applied per manufacturer's data bulletin/instructions

"* Service Level 1 qualified applicator (BSRI/Plant Vogtle)

"* Dimetcote® 9: DFT = 2.5-4 mils (max)

OSRTC 11/2Z(99

DBA Testing of Dimetcote® 9

* Test Specimen * Test Conditions:

» Non-aged, Non-defected in D3911

» Non-aged, Defect Type 2 in D3911

» Aged, Defect Type 2 in D3911

I3SRTC I IP219

DBA Test Results- Dimetcote® 9

"* Fine Powder Present, Debris Source when Mechanically Rubbed

"* Oxidation Products (Whitish Powder) Formed in DBA

"* Minor Corrosion of Exposed Steel

Pre-DBA, Type 2 Defect Post-DBA, Type 2 Defect

ISRT¢ asfrf•rT~chn•

SEM Images of Dimetcote® 9 (Pre- & Post-Irradiation)

Non-irradiated Irradiated to Ix 109 R @ 106 Whr

Note: No Obvious Difference in Size and Morphology of Zn/ZnO Particles; slight charging 113SRTC

j 1122199

IOZ: Composition vs. Depth

PWR Plant Specimen (CarboZinc® 11)

Laboratory Specimen (Dimetcote® 9 on steel)

(15%Si, 85% Zn)

- (15%Si, 85% Zn)

- (15% Si, 85% Zn)

(15% Si, 85% Zn)

(15% Si, 85% Zn)

MON,¢ 111221F,99T~mb/

Finding of IOZ Testing and Analysis

"* Plant Chips with CZ-11® >» Severe Curling with DBA Exposure

>> Particles Loosen & Disbond as Chips Curl

> Analysis to Explain Curl of Bi-layer Chip

"* Laboratory Specimens with Dimetcote@ 9 > No "Chip" Formation

>> Powdery Substance with Radiation and with DBA Exposure; Can be Removed Mechanically

L1SRTC 17/22/99

Path Forward* Laboratory Specimens

> Coating Systems Applied by KTA-Tator - Phenoline® 305 Finish/IOZ (old CZ-11 w/asbestos) on steel

- Phenoline® 305 Finish/Primer on concrete

» Mechanical & Physical Properties Testing

> Non-aged, Aged, DBA

* Plant Specimens > Trojan - leak channel sections received

> Oconee - chips only

> SONGS-3

> Maine Yankee

> DBA; Additional Aging + DBA

112/2299

1

PIRT PROCESS FOR

SRTC Containment Coatings Research Program

Activity Overview and Status

Jon Cavallo Industry Coatings PIRT Panel Chairman

November 22, 1999

Industry Coatings PIRT Activity

PRESENTATION OVERVIEW * Background * What is a PIRT? * PIRT Panel Members * Objectives of PIRT for SRTC Research Program * Definitions * PIRT Steps * Coating Systems "• Anomalies" • PIRT"High" Rankings * Inorganic Zinc Primers • Summary

ll,22 2


BACKGROUND

* SRTC Research Program Objectives - Investigate NPP containment coating failure mechanisms, failed

coating debris characteristics and lime to failure. - Identify failed coatings debris characteristics and time to failure for

use in debris transport studies simulating post-LOCA conditions * Industry Coating PIRT Panel Evolution

- SRTC Research Program initiated -July, 1998 - SRTC Research Program initial results presented - November, 1998 - NEI recommends performing PIRT to guide program

Insan 3

2

Industry Coatings PIRT Activities

BACKGROUND (continued)

PIRT panel formed of industry-recommended members:

* March 2-3, 1999 meeting * April 8-10,1999 meeting * May 19-21,1999 meeting * June 28, 1999 -addressed public meeting * July21, 1999 - published interim report * August 23- 24, 1999 meeting * November 22,1999- addressed public meeting * December 9-10,1999- scheduled meeting * Later in 2000 - publish final report


PIRT Panel Members "* Jon Cavallo, CCC&L, Chairman "* Tim Andreychek, Westinghouse Owners Group

"* Jan Bostelman, ITS Corportation

"* Brent Boyack, Los Alamos National Lab

"* Garth Dolderer, Florida Power and Light Company "* Dave Long, Retired (formerly Keeler & Long)

"* NRC Sponsor "* Al Serkiz, NRC/RES, Project Manager


What is a PIRT? Phenomena Identification

and

Ranking Table

The acronym describes the effort; first, identify pertinent process and phenomena related to the performance of the coating system of interest, then rank them relative to one or more figures of merit.

11t• a

3


Industry Coatings PIRT Objectives: "* Identify coating systems considered for PIRT process

- Based on industry usage - Steel substrate - Concrete substrate

"• Identify phenomena and processes for coatings applied inside NPP containments

"* Rank those phenomena and processes with respect to their importance to coatings failures

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Industry Coatings PIRT Activity POTENTIAL PIRT APPLICATIONS 1. Provide input to SRTC program for selection of

materials and parameters to be investigated. 2. Provide input to SRTC program on phenomena to be

simulated in experimental phase of test program. 3. Provide input to SRTC on data to be obtained from

the experimental program. 4. Provide input to SRTC coatings failure model for

features to be included in the program. 5. Provide input to industry groups for their use. 6. Provide input to NRC for regulatory considerations.


DEFINITIONS

"• Failure: - Disbonding ot an applied coating (paint) system into free

debris, regardless of size and shape, that is available for transport; a debris source term.

"* Source terms: - Coating systems that have failed prior to the event. - Coating systems that fail as a consequence of the event.

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DEFINE THE ISSUES:

1. Why and how do coating systems fail?

2. What are the effects of environmental exposure on coating systems?

3. What is the time to failure for coating systems?

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Industry Coatings PIRT Activity DEFINE POTENTIAL COATING FAILURE

SCENARIOS 1. Normal plant operation 2. Mechanical damage 3. Chemical damage (spills, chemical decontamination) 4. Normal operation followed by intermediate / large

LOCA without jet impingement 5. Jet impingement due to LOCA; excluded from PIRT

Note: These scenarios may occur independently or synergistically to cause failure


DEFINE PARAMETERS OF INTEREST

Will the coating system detach from the surface to which it is applied?

or,

Will the paint fall off?

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5


PARTITION SCENARIO INTO CONVENIENT TIME PHASES

Phase 1: Normal Operation followed by LOCA, no jet impingement.

t-) time Coating system installation: Surface Preparation Coating Application Curing

ILRT t = 0.0 Start of Power Operations. t = 40 yr. LOCA occurs (60 years - plant life extension)

Industry Coatings PIRT Activity Phase 1: Normal operations

* Pressure cycles; 1 atmosphere to approximately 60 psig (ILAT) at time = 0 and approximately once every 10 years thereafter.

* Thermal cycles; (associated with refueling) - 120 2 F during normal operation to outside ambient every 18 months, duration approximately 30-45 days

* Humidity cycles; (associated with refueling - 20 percent RH during normal operation to outside ambient (up to 100 percent RH) every 18 months, duration approximately 20-45 days

"* Chemical cycles; soluble salts (e.g. chlorides), boric acid, decontamination solutions, grease, oil, solvents

"* Radiation; varies with location in containment

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Industry Coatings PIRT Activity LOCA occurs at t = 40 (60) years (end of licensed plant life)

0 to 40 sec: Containment pressure and temperature peak and Phase 2 begin to decrease, blowdown of RCS complete at 40

sec, jet from break ends. 40 sac to Safety injection and containment spray initiated from 30 win: RWST, containment fan coolers operating, pool Phase Phase 3 buildup dynamics, condensation on surfaces, boric

acid washdown from containment spray, increase in ionizing radiation, turbulence associated with pool buildup.

At 30 min: Full containment water level reached, switchover from RWST injection to sump recirculation, containment spray and core coolant drawn from sump, containment fan coolers continue to operate.

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30 min to Initiate and maintain recirculation of core flow and 2 hours: containment spray from sump, flow fields to sump Phase 4 established, containment tan coolers continue to

operate, washdown of surfaces due to containment spray, decrease in temperature and pressure, chemical exposure to submerged coatings in pool.

> 2 hours: Containment spray terminated, recirculation to core Phase 5 continues to licensing basis (100 hours to 6

months), flow fields to sump decrease due to termination of containment spray, containment fan coolers continue to operate

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PARTITION COATING SYSTEM INTO COMPONENTS

Components are: - Substrate, - Interface between substrate and first coat, - Each coat, and, - Interfaces between each coat

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IDENTIFY PLAUSIBLE PHENOMENA

Phase 1: Normal Operations

Phases 2 - 5: Accident Conditions (LOCA after 40 years (or 60 years) normal plant operations)

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RANK COMPONENTS AND PHENOMENA FOR IMPORTANCE

"* High - Phenomena has a dominant impact on the primary parameter of interest. Phenomena will be explicitly considered in the implementation of the SRTC research program.

"* Medium - Phenomena has a moderate influence on the primary parameter of interest. Phenomena will also be considered in the implementation of the SRTC research program.

". Low - Phenomena has a small effect on the primary parameter of interest. Phenomena will also be considered in the implementation of the SRTC research program, to the extent possible.

Industry Coatings PI RT Activity IDENTIFY COATING SYSTEMS

Eight systems considered originally: 1. Steel Substrate. inorganic Zinc Primer, Epoxy Phenolic Topcoat

(PIRT published 7121/99) 2. Steel substrate, epoxy phenolic primer, epoxy phenolic topcoat 3. Steel substrate, inorganic zinc primer, epoxy topcoat 4. Steel substrate, epoxy primer, epoxy topcoat (PIRT drafted) 5. Concrete substrate, surfacer, epoxy phenolic topcoat 6. Concrete substrate, surfacer, epoxy topcoat

(PIRT published 7/21/99) 7. Concrete substrate, epoxy phenolic primer, epoxy phenolic topcoat 8. Concrete substrate, epoxy primer, epoxy topcoat (PIRT drafted)

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Industry Coatings PIRT Panel

IDENTIFY COATING SYSTEMS (continued)

Additional system recently added for consideration by Industry Coating PIRT Panel: - IOZ primer untopcoated

Sadded based on NEI input to NRC * PIRT will be drafted during 12/9- 12/10/99 meeting

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"ANOMALIES" are credible paint film imperfections, including: - few No. 4 blisters (ASTM D714) - pinholes,

- small cracks

- debris (roller hairs, fuzz, blast grit, dirt, foreign material)

- overspray / dry spray

- other coating film defects

EPOXY PHENOLIC

TOPCOAT

Steel IOZe Low Adhesion Area

Substructure ?rimer "

a S D Pressure e nt Water

- __ fAir I Water Borne

S •Chemicals

P oPteniali Under Cut Site * S

S EPOXY PHENOLIC

* S TOPCOAT

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PIRT "HIGH" RANKINGS FOR STEEL SUBSTRATES

IOZ PRIMER, EPOXY PHENOLIC EPOXY PRIMER, EPOXY TOPCOAT TOPCOAT (PUBLISHED) (IN DRAFT)

S1. Environmental exposure (topcoat) * 1. Environmental exposure (primer, S2. Minor coating ammariesn (pdnmer) topcoat)

* 3. Differential expansiontraction * 2. Minor coaling anomaties (primer, (primeritopooat interface) topcoat)

S4. Expansiorncontraction (topcoat) 3. Mechanical damage (primer, topcoat) S5. Differential contraction (ptimernopcoal * 4. Bristering and delamination

interface) (substratelprimer interface, S6. Diffusion of airrwater (primer, primer/topcoat interface)

primenopooat interface) 5. Oxidation (substrate'primer interface) S7. Contraction (topcoat) * 6. Air, water and chemical intrusion S8. Moisture and air intrusion through above pool (primer)

damage sites (primrer) 7. Air, water and chemical intrusion below pool (pomer)

PIRT "HIGH" RANKINGS FOR CONCRETE SUBSTRATES

SURFACER, EPOXY TOPCOAT EPOXY PRIMER, EPOXY TOPCOAT (PUBLISHED) (IN DRAFT)

1 .Outgassing / vapor expansion 1. Outgassing / vapor expansion (substrate) (substrate)

S2. BrlistengIdelaninationr 2. Bristering/delarnination (subsnretalsurfacer interface, (substratelprimer interface) surfacer, surfaoer/topcoat * 3. Vapor buildup (subotrate/primer interface) interface, primer/topcoat

S3. Vapor buildup (substrate/surfacer interface) interface, surfacer, * 4. Minor coating anomalies (primer, surfacerltopcoat interface) topcoat)

S4. Minor coating anomalies (surfacer, * 5. Ervironmental exposure (topcoat) topoat) 6. Pressure gradients (substrate)

S5. Environmental exposure (topcoat) *7. Expansionloonlraction S6. Pressure gradients (substrate) (substrataprimer interface)

"Fresh" Inorganic Zinc Primer Red = Silicate Binder

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"-Aged" Inorganic Linc Primer Red = Silicate Binder Blue = Zinc Oxides and

Carbonates

Ambient Environment

PROPERLY APPLIED IOZ PRIMER/ ORGANIC TOP COAT SCHEMATIC

IMPROPERLY APPLIED IOZ PRIMER / ORGANIC TOP COAT SCHEMATIC

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SUMMARY

- Industry Coatings PIRT Panel; - Four PIRT meetings held - Two public meetings addressed (6/28/99 and 11/22/99) - Four PIRT's developed (2 published, 2 draft) - One additional meeting and PIRT scheduled for development

(12/9- 12/10/99) - Interim report published 7/21/99 - Final report will be published in 2000

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meeting agenda and handouts regarding meeting concerning … · 2010. 9. 26. · a-l.e~cv-.[il...

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