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

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

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

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  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

  3. 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)

  5. 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

  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

  7. 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 TOxmax 391ºC (ouput file) • Changes in outside clad T very small (0-17 ºC) • Similar behavior in other cases (CIP0-1…)

  9. SPECIFIC QUESTIONS. FRAPTRAN-1.4 CIP3-1

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