Transcript Diapositiva 1

FRAPCON/FRAPTRAN users group meting
CIEMAT ACTIVITIES
on
FRAPCON/FRAPTRAN APPLICATIONS
(2010-2012)
Nuclear Safety Research Unit
Manchester (UK), 07.09.12
FRAPCON/FRAPTRAN users group meting
PROJECTS
 TERMOMEC (Thermo-mechanical Behaviour of Nuclear Fuel at High Burnup)
 Sponsor: CSN (Spanish Nuclear Regulatory Body)
 Codes used: FRAPCON-3.4 and FRAPTRAN-1.4
 AICAST (Analysis of Integrity of Spent Fuel in Dry Storage and Transport)
 Sponsor: ENRESA (Spanish Radioactive Waste Management Company)
 Code used: FRAPCON-3.4
Nuclear Safety Research Unit
Manchester (UK), 07.09.12
FRAPCON/FRAPTRAN users group meting
TERMOMEC MAIN ACTIVITIES
FRAPCON-3.4 + FRAPTRAN-1.4
Ramps
RIA
3rd SCIP
Benchmark
OECD
RIA-Benchmark
(R2, HALDEN)
Uncertainties analysis
CIP0-1
Other cases
(deterministic)
(probabilistic)
LOCA
HALDEN
(CABRI, NSRR)
Nuclear Safety Research Unit
Manchester (UK), 07.09.12
FRAPCON/FRAPTRAN users group meting
AICAST MAIN ACTIVITIES
FRAPCON-3.4xt
Dry storage
Creep
Hydrogen
DHC
Embrittlement Hydride radial
(HE)
reorientation
(HRR)
Stage
I
II
III
Mechanism
Creep
DHC + HE
HRR
Nuclear Safety Research Unit
Manchester (UK), 07.09.12
FRAPCON/FRAPTRAN users group meting
SPECIFIC QUESTIONS
FRAPCON-3.4
 Gap from plotter file different from (rclad in - rfuel out) (values from“print2.f”)
 Clad thickness:
 tcc in “frpcon.f” axially changes (clad thinning due to oxide)
 tcc in “print2.f” does NOT change from node to node (top value) → same rclad out
 Transmitted to “ccreep.f” → stress not affected by axial variation
FRAPTRAN-1.4 (RIA simulations)
 Tclad out with oxide ≈ Tclad out without oxide (completely spalled)
 If clad failure → ztot ≠ ztherm+ zelast+ zperm
Nuclear Safety Research Unit
Manchester (UK), 07.09.12
FRAPCON/FRAPTRAN users group meting
RELATED PAPERS
 L.E. Herranz, I. Vallejo, G. Khvostov, J. Sercombe, G. Zhou “Assessment of fuel rod performance codes
under ramp scenarios investigated within the SCIP project”, Nuclear Engineering and Design 241 (2011),
815-825
 A. Hughet, I. Vallejo, L.E. Herranz, “Pretest modeling of CABRI CIP3-1 test with FRAPCON-3/FRAPTRAN
Codes”, 2011 Water Reactor Fuel Performance Meeting Chengdu, China, Sept. 11-14, 2011
 A. Hughet, L.E. Herranz, “ASSESSMENT OF STEADY STATE UNCERTAINTIES IMPACT ON RIA
MODELING”, IAEA Technical Meeting on Fuel Behavior under Transient and LOCA Mito city, Ibarakiken, 19-21 October 2011
 I. Sagrado, I. Vallejo, L.E. Herranz, “Analysis of CIP0-1 and CIP3-1 tests with FRAPTRAN and SCANAIR:
effect of the major codes assumptions”, Top Fuel 2012
 L. Herranz, F. Feria “Extension of the FRAPCON-3.3 creep model to dry storage conditions”, Progress in
Nuclear Energy, Vol 52, p 634-639, 2010
 F. Feria, L. Herranz, “Evaluation of creep during dry storage in low and high burnup fuels”, IAEA
International Conference on Management of Spent Fuel from Nuclear Power Reactors, Vienna, 2010
 F. Feria, L. Herranz, “Creep assessment of Zry-4 cladded high burnup fuel under dry storage”, Progress in
Nuclear Energy, Vol 53, p 395-400, 2011
 F. Feria, L. Herranz, “FRAPCON-3.4 extension to model hydrogen effects on cladding mechanical behavior
during dry storage”, Top Fuel 2012
+ 5 technical reports
Nuclear Safety Research Unit
Manchester (UK), 07.09.12
FRAPCON/FRAPTRAN users group meting
THANK YOU FOR YOUR ATTENTION
Nuclear Safety Research Unit
Manchester (UK), 07.09.12
FRAPCON/FRAPTRAN users group meting
SPECIFIC QUESTIONS. FRAPTRAN-1.4
CIP3-1
No oxide (set to “0” restart)
Oxide from FRAPCON-3.4 (restart)
Outside Cladding Temperature (K )
plot.CIP31_CASE 4Spall
Outside Cladding Temperature (K )
plot.CIP31_CASE 4
900
Oxide  [75-100] mm
TOx max  391ºC
(ouput file)
850
800
750
700
1
2
3
4
5
650
6
600
7
8
550
9
500
Outside Cladding Temperature (K )
Outside Cladding Temperature (K )
900
850
800
700
600
550
500
450
400
400
0.1
0.2
0.3
0.4
0.5
0.6
Time (sec)
0.7
0.8
0.9
1
4
5
6
7
8
9
650
450
0
1
2
3
750
0
0.1
0.2
0.3
0.4
0.5
0.6
Time (sec)

Changes in outside clad T very small (0-17 ºC)

Similar behavior in other cases (CIP0-1…)
Nuclear Safety Research Unit
0.7
0.8
0.9
1
Manchester (UK), 07.09.12
FRAPCON/FRAPTRAN users group meting
SPECIFIC QUESTIONS. FRAPTRAN-1.4
CIP3-1
Cladding Total Axial Strain
plot.CIP31_CASE 4
0.01
Cladding Total Axial Strain
0.009
0.008
1
0.007
2
0.006
3
0.005
5
4
6
0.004
7
8
0.003
9
0.002
0.001
0
0
0.2
Cladding Thermal Axial Strain
plot.CIP31_CASE 4
0.8
1
Cladding Elastic Axial Strain
plot.CIP31_CASE 4
0.0018
Cladding Perm Axial Strain
plot.CIP31_CASE 4
0.007
0.0016
0.003
0.006
1
0.0012
2
3
4
0.001
5
6
0.0008
7
8
0.0006
9
0.0004
0.0025
0.005
1
2
3
0.004
4
5
0.003
6
7
8
0.002
9
0.001
Cladding Perm Axial Strain
0.0014
Cladding Elastic Axial Strain
Cladding Thermal Axial Strain
0.4
0.6
Time (sec)
1
0.002
2
3
4
5
0.0015
6
7
8
0.001
9
0.0005
0.0002
0
0
0
0
0.2
0.4
0.6
Time (sec)
0.8
1
-0.001
Nuclear Safety Research Unit
0.2
0.4
0.6
Time (sec)
0.8
1
0
0
0.2
0.4
0.6
Time (sec)
0.8
Manchester (UK), 07.09.12
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