Diapositiva 1

1
CIEMAT ACTIVITIES on FRAPCON/FRAPTRAN
APPLICATIONS (2010-2012)
2
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

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TERMOMEC MAIN ACTIVITIES
FRAPCON-3.4 FRAPTRAN-1.4
Ramps
RIA
Uncertainties analysis
LOCA
3rd SCIP Benchmark (R2, HALDEN)
HALDEN
OECD RIA-Benchmark (CABRI, NSRR)
CIP0-1 (deterministic)
Other cases (probabilistic)
4
AICAST MAIN ACTIVITIES
FRAPCON-3.4xt
Dry storage
Creep
Hydrogen
DHC
Embrittlement (HE)
Hydride radial reorientation (HRR)
Stage I II III
Mechanism Creep DHC HE HRR
5
SPECIFIC QUESTIONS
FRAPCON-3.4

• Gap from plotter file different from (rclad in -
  rfuel out) (values fromprint2.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

6
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, Ibaraki-ken, 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
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THANK YOU FOR YOUR ATTENTION
8
SPECIFIC QUESTIONS. FRAPTRAN-1.4
CIP3-1
Oxide from FRAPCON-3.4 (restart)
No oxide (set to 0 restart)
Oxide ? 75-100 mm
?TOx max ? 391ºC (ouput file)

• Changes in outside clad T very small (0-17 ºC)
• Similar behavior in other cases (CIP0-1)

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SPECIFIC QUESTIONS. FRAPTRAN-1.4
CIP3-1