Probabilistic Estimation of LMR Fuel Cladding Performance Under Transient Conditions

  • Published : 2003.04.01

Abstract

The object of this paper is the probabilistic failure analysis on the cladding performance of WPF(Whole Pin Furnace) test fuel pins under transient conditions, and analysis of the KALIMER fuel pin using the preceding analysis. The cumulative damage estimation and Weibull probability estimation of WPF test are performed. The probabilistic method was adapted for these analyses to determine the effective thickness thinning due to eutectic penetration depth. In the results, it is difficult to assume that a brittle layer depth made by eutectic reaction is all of the thickness reduction due to cladding thinning. About 93% cladding thinning of the eutectic penetration depth is favorable as an effective thickness of cladding. And the unreliability of the KALIMER driver fuel pin under the same WPF test condition is lower than that of the WPF pin because of the higher plenum-fuel volume ratio and lower cladding inner radius vs. thickness ratio. KALIMER fuel pin developed from conceptual design has a more stable transient performance for a failure mechanism due to fission gas buildup than the WPF pin.

References

  1. Raymond J. Puigh, 'In-Reactor Creep of Selected Ferritic Alloys', Effects of Radiation on Meterials: Twelfth International Symposium, ASTM STP 870, American Society for Testing and Materials, pp. 7-18(1985)
  2. J.M. Kramer et al., 'Modeling the Behavior of Metallic Fast Reactor Fuels During Extended Transients', Journal of Nuclear Materials, 204, 203-211(1993) https://doi.org/10.1016/0022-3115(93)90218-N
  3. A.B. Cohen, 'Fuel/Cladding Compatibility in U-19Pu-10Zr/HT9-clad Fuel at Elevated Temperature', Journal of Nuclear Materials, 204, 244-255(1993) https://doi.org/10.1016/0022-3115(93)90223-L
  4. H.M. Kwon et al., 'Weibull analysis of HT9 Fuel Cladding Rupture Under Transient Conditions', Proceedings of Korean Nuclear Society Spring Meeting (2002)
  5. Y.Y. Liu et al., 'Behavior of EBR-II Mk-V-Type Fuel Elements in Simulated Loss-of-Flow Test', Journal of Nuclear Materials, 204, 194-202 (1993) https://doi.org/10.1016/0022-3115(93)90217-M
  6. F.H. Huang, Transient Failure Behavior of HT9, WHC-SA-2513-FP, Westinghouse Hanford Company (1994)
  7. Jack A. Collins, Failure of Materials in Mechanical Design, John Wiley & Sons, Inc. (1993)
  8. M. Bocek, 'The Life Fraction Rule and a Probabilistic Approach to High-Temperature Failure', Journal of Nuclear Materials, 91, 147-150 (1980) https://doi.org/10.1016/0022-3115(80)90041-0
  9. Cheol Nam et al., 'Statistical Failure Analysis of Metallic U-10Zr/HT9 Fast Reactor Fuel Pin by Considering The Weibull Distribution and Cumulative Damage Fraction', Ann. Nucl. Energy, 25, 1441-1453 (1998) https://doi.org/10.1016/S0306-4549(98)00043-7
  10. Weibull Analyses of EBR-II Driver Fuel Lifetime, Trans. Am. Nucl. Soc., 32, 219-221 (1979)
  11. Paul A. Tobias et al., Applied Reliability: 2nd Edition, Van Nostrand Reinhold, (1995)
  12. Robert B. Abernethy et al., The New Weibull Handbook, 2nd Edition, Gulf Publishing Company (1996)
  13. Robert A. Mitchell, Introduction of Weibull Analysis, Pratt&Whitney Aircraft (1967)