korean activities for nuclear data...
TRANSCRIPT
Korean Activities for Nuclear Data Center
AASPP Workshop
AUg. 27-29, 2012, Pohang Accelerator Laboratory, Korea
Young-Sik CHO, KAERI
on behalf of Young-Ouk LEE
NDC @KAERI 1
Nuclear Data Needs in Korea
Fast breeder reactor project, namely Liquid Metal Fast Reactor, which is the
largest nuclear R&D program, requires quantification of cross section
uncertainties in their reactor designs.
Advanced Fuel Cycle R&D, which is strongly related to the fast reactor
project, needs up-to-date neutron cross sections of MA and fission products
Nuclear Safety and Security Commission was newly organized as a ministry
level after the Fukushima accident. The committee is emphasizing nuclear
safety and security and is promoting related R&D. Within this regard,
improving and updating the nuclear structure and decay data become
important.
NDC @KAERI 2
Nuclear Data Network in Korea
(KIGAM VDG) •MeV pulse neutron
•Wide-range standard ntn
(KoRIA) •Fast neutron data
(KAERI photo-ntn) •keV pulse neutron
•TREE
Nuclear Data Evaluation
Processing/ Validation
Nuclear Data Measurements
Supply to Applied R&D
(Pohang PNF ) •eV pulse neutron
•Neutron resonance
•Photonuclear reaction
• SFR, AFC, ADS
• Fusion
• Accelerator
• Space, Medical, etc
International Network
Domestic Nuclear Data Network
IAEA, OECD, BNL, EU, JAEA , CIAE etc
NDC @KAERI 3
Nuclear Data Center @ KAERI
Performs the measurement, valuation, processing and validation of nuclear
data which are requested by the various fields.
1 director, 11 permanent staffs (3 in evaluation, 1 in measurement, 2 in
atomic and molecular data, 2 in processing and validation, 3 in applications),
1 PhD student and 1 secretary.
Mission of KAERI/NDC is disseminating outcomes of international network
as well as promoting domestic nuclear data activities and related
applications.
NDC @KAERI 4
International Collaboration of NDC
Cooperation with IAEA
Fusion Evaluated Nuclear Data Library
EXFOR Database participation
Cooperation with OECD
Covariance data among the WEPC members
Joining the formal JEFF member in improvement of the JEFF Library
Cooperation with ORNL
Evaluation of Np-237, Pu-240, Cm isotopes
Cooperation with BNL
Development of Nuclear Reaction methodology in the resonance region
Evaluation of structure material such as zirconium
NDC @KAERI 5
Nuclear Data Evaluation Activities
Evaluation Technique for Nuclear Reaction
Development of nuclear reaction module in resonance region
Development of the uncertainty analysis code, KERCEN, which is based on
the nuclear cross section and sensitivity in order to eliminate the ambiguity
from the result of KALMAN calculation
Uncertainty calculations of resonance region using the KERCEN code for
the important structure materials
NDC @KAERI 6
Nuclear Data Evaluation Activities
Production of Evaluated Nuclear
Data
Neutron cross section data and
covariances on Np-237, Pu-240, and 11
Cm isotopes for developing the advanced
fuel cycle and future reactors
7 zirconium isotopes including Zr-
90,91,92,93,94,95,96
15 nuclides which are Si-28,29,30, Al-27,
Fe-54,56,57,58, Mo-92-
94,95,96,97,98,100 for improving the
Fusion Evaluated Nuclear Data Library
NDC @KAERI 7
Nuclear Data Evaluation Activities
NDC @KAERI 8
Nuclear Data Process and Validation
Develop validation system of
uncertainty and evaluation of
uncertainties for critical system
Development of fictitious critical
system in order to perform the
quantitative analysis for nuclear cross
section and covariance data
Production and validation of libraries
of several group constants with the
MATX format and libraries of
covariance data with the COVFIL
format
DANTSYS
(44g)
*, GENDF
(44g)
COVFIL
(44g)
SUSD3D
JENDL-3.3
NJOY
TRANSX
ISOTXS(44g)
NJOY
(ERRORR)
Establishment of Validation System of Uncertainty and
Production of Group Constants
NDC @KAERI 9
Nuclear Data Process and Validation
F1 F2 F3 F4 F5 F6 F7 F8 F9 F10F11F12F13F14F15F16F17F18F19F20F21F22
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
1200
Diffe
ren
ce
fro
m B
en
ch
ma
rk k
eff (
pcm
)
Fast Benchmark
ENDF/B-VII.0 (Ref)
JEFF-3.1.1
JENDL-4.0
KAERI/ORNL
T1 T2 T3 T4 T5 T6-400
-200
0
200
400
600
800
1000
1200
Diffe
ren
ce
fro
m B
en
ch
ma
rk k
eff (
pcm
)
Thermal Benchmark
ENDF/B-VII.0 (Ref)
JEFF-3.1.1
JENDL-4.0
KAERI/ORNL
keff Results for Fast and Thermal Assemblies
NDC @KAERI 10
Nuclear Data Process and Validation
Establishment of Validation System of Uncertainty and
Production of Group Constants
JEZEBEL-Pu239
JEZEBEL-Pu240
FLATTOP-Pu
ZPR-6/7
ZPR-6/7 High-Pu240
ZPPR-9
JOYO Mk-I
0.985
0.990
0.995
1.000
1.005
1.010
1.015
JENDL-4.0
P1-S4
P3-S16
C/E
Va
lue
s o
f k
eff
ENDF/B-VII.0
P1-S4
P3-S16
Criticality
JEZEBEL-Pu239
JEZEBEL-Pu240
FLATTOP-Pu
ZPR-6/7
ZPR-6/7 High-Pu240
ZPPR-9
JOYO Mk-I
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6Total Uncertainty (%) due to JENDL-4.0 Covariance Data
To
tal U
nce
rta
inty
(%
) o
f k
eff
ENDF/B-VII.0
P1-S4
P3-S16
JENDL-4.0
P1-S4
P3-S16
Uncert. for P1-S4
tend to become smaller than P3-S16 for 1-D models
due to changes in elastic & inelastic scattering contributions
ENDF/B-VII.0
tend to be larger than JENDL-4.0 for 1-D models
tend to be smaller than JENDL-4.0 for 2-D models
NDC @KAERI 11
Nuclear Data Measurement Activities
KAERI/NDC coordinates Operation and Design for Neutron
Sources from eV to MeV energies
Conceptual design of target and facility for fast neutron source at the KAERI
electron accelerator
Pohang Neutron Facility (PNF) of Pohang Accelerator Laboratory (PAL),
Van de Graff laboratory of Korea Institute of Geosciences and Mineral
Resources (KIGAM), and
MC-50 Cyclotron at Korea Institute of Radiological and Medical Sciences
(KIRAMS)
NDC @KAERI
Conceptual design of target and facility for fast neutron source at the
KAERI electron accelerator
Experimental Hall
Collimator
16 m
Target
Energy 17 MeV
Pulse Frequency 200 kHz
Beam Power 1.4 kW
Neutron Yield 3.5 x 1011 s-1
Flight Length 10 m
Energy Resolution 1% (at 1 MeV)
Heat Exchanger
Expansion
Tank
Electromagnetic Pump
Beam
Irradiation
Area
(Mo관)
Sump
Tank
Flow Meter
NDC @KAERI
e-
0.5 mm
0 40 80 120 160
10-5
10-4
10-3
10-2
10-1
100
101
102
103
104
105
106
Tl206m
Tl208
Hg203
Tl207m
Tl206Tl207
Hg205
Pb209
Activity (
Bq
, x1
40
0)
Time (h)
Pb207m
2.500E-07
2.500E-07
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2.500E-07
2.500E-07
2.500E-07
2.500E-07
2.500E-07
2.500E-07
-1500 -1000 -500 0 500 1000 1500
-1000
-500
0
500
1000
1500
2000
2500
Y(cm
)
X(cm)
Activation and Shielding Analysis of Target System
NDC @KAERI
Cr-52
U-235 fission Chamber
Using LaBr3 (E=3%, t=230ps)
150o
110o
Beam Dump
Shielding(Concrete+Pb)
NeutronSourceTarget
Fission Chamber
Neutrons
10 m
LaBr3Detector
Cr Sample
5 cm
Relative to reference (e.g. U235)
Use of Ionization chamber and Time projection
chamber
Inelastic scattering Fission
Study of inelastic scattering and fission cross section measurements
NDC @KAERI
Neutron TOF form Cf-252 , p (45 MeV)-Be
Neutron detection by BC-501 → PSD (Pulse Shape Discrimination) to separate gamma sand neutrons
TOF (n)
)(
)(
11
1)(
2
2
0
iTc
L
c
xv
cmiE
n
n
n
TOF (n+)
Cf252 P (45 MeV) + Be
TOF (n+)
BC501
RF
TFA
TFA
PSA GG
CFD GG
GG
TFA CFD GG
TAC
TAC/SCA
MCA
stop
start
stopstart
start gate
Study of Neutron TOF (Time-of-Flight) Measurement
NDC @KAERI 16
Nuclear Data Measurement Activities
Pohang Neutron Facility of PAL Measurement of total cross sections based on the TOF method using 50-70 MeV, 30-70 mA,
10-15 Hz beam
Measurement of nuclear reaction using Bremsstrahlung gamma-ray
Measurement of thermal neutron capture cross section and resonance integral
Development of the BGO detector and the measuring software
Specifications:
Electron beam energy = 40 ~ 80 MeV
Repetition rate = 10~15 Hz
Pulse width = 1~2 μs
Peak beam current = 30~60 mA
TOF flight length =12 m
Target + water moderator to produce neutron pulse
Ta plates + cooling system
Detector: scintillator + PM tube, 12 BGO detectors
BC702 [6Li-ZnS(Ag)] Thickness 1.6cm, diameter 12.5cm
Sample changer consisting of remotely controlled 4 sample holders
NDC @KAERI 17
Nuclear Data Measurement Activities
Pohang Neutron Facility of PAL
at T=20°C
감마 검출기 특성
Pulse height
spectrum
of 60Co
source
NDC @KAERI 18
Nuclear Data Measurement Activities
NDC @KAERI 19
Nuclear Data Measurement Activities
Van der Graff of KIGAM
1
0
4
8
To
tal C
ross S
ectio
n o
f C
o N
atu
ral(
ba
rn)
Neutron Energy(MeV)
ENDF/B-VII
JENDL-3.3
JEF-3.1
ROSFOND(2008)
Total cross section of Natural Co
Neutron energy [MeV]
0.6 0.8 1.0 1.2
Neu
tro
n t
ota
l cro
ss
sec
tio
ns
of
Ti [b
arn
]
0
1
2
3
4
5
6
ENDF-6
CENDL-2KIGAM
R. B. Schwartz 1974
Neutron energy [MeV]
0.6 0.8 1.0 1.2
Neu
tro
n t
ota
l c
ros
s s
ec
tio
ns o
f F
e [
barn
]
0
2
4
6
8
10
CENDL-2
BROND-2.2
KIGAM
Neutron energy [MeV]
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
Neu
tro
n t
ota
l c
ros
s s
ec
tio
n o
f 8
9Y
[B
]
2
4
6
8
10
Poenitz-1981
Miller-1954
ENDF-6JENDL-3.3
KIGAMN 2010
NDC @KAERI 20
Nuclear Data Measurement Activities
Conceptual design of Korea Rare Isotope Accelerator project will
be finished by the end of 2012. KAERI/NDC has a utilization plan
as follows:
Neutron data for GEN-VI
and fusion device using
mono-energetic and
spallation n source,
Nuclear data for waste
transmutation using In-
flight and ISOL facilities,
and
Nuclear data from
Surrogate reactions using
heavy ion sources.
NDC @KAERI 21
Nuclear Data Activities
EXFOR compilation
The EXFOR compilation activity of KAERI/NDC is ongoing since
2009 under the guidance of IAEA/NDS. As of 2012, KAERI/NDC
has produced 25 entries
It consists of experimental data for neutron total cross section,
isomeric-yield ratio induced by bremsstrahlung, photo-fission yields,
and the production cross section by proton induced reactions.
NDC @KAERI
Summary
KAERI/NDC is disseminating outcomes of international network as
well as promoting domestic nuclear data activities
KAERI/NDC collaborates with IAEA and OECD/NEA, and the
foreign institutes such as ORNL and BNL
Various activities of the nuclear data evaluation, processing,
validation, and measurement have been performed such as:
Development of Evaluation Technique for Nuclear Reaction
Production of Evaluated Nuclear Data
Establishment of Validation System of Uncertainty and Production of
Group Constants
Operation and Design for Neutron Sources from eV to MeV energies
The EXFOR compilation activity of KAERI/NDC is ongoing since
2009 under the guidance of IAEA/NDS.