Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (12): 120603-120603.doi: 10.11889/j.0253-3219.2016.hjs.39.120603

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Influence of particle size and its standard deviation on failure probability of coated fuel particles

ZHANG Yongdong1,2, LIN Jun1, ZHANG Haiqing1, ZHU Zhiyong1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-09-01 Revised:2016-11-07 Online:2016-12-10 Published:2016-12-10
  • Supported by:

    Supported by Strategic Priority Program of Chinese Academy of Sciences (No.XDA02030200)

Abstract:

Background: Tristructural isotropic (TRISO) coated fuel particles are used as fuel carrier for high-temperature gas-cooled reactors and solid-fuel-molten-salt reactors. The failure of the TRISO coated fuel particles can result in unacceptable release of fission products. Purpose: The distribution of the kernel radius and coating layer thickness could impact the failure probability of the TRISO particles. Methods: The influence of the distribution of the kernel radius and coating layer thickness on the failure probability was also analyzed by random sampling. Results: The design of the kernel radius, Buffer PyC layer thickness as well as the SiC thickness affect the TRISO coated fuel particles failure probability much heavier. Conclusion: It is found that the failure probability of the TRISO coated fuel particles can be reduced by one order of magnitude when the standard deviation of the distribution of the Buffer PyC layer thickness is reduced to 16 μm.

Key words: TRISO coated fuel particles, Pressure vessel failure, TRISO coated fuel particle size, Standard deviation

CLC Number: 

  • TL352