Nuclear Techniques ›› 2020, Vol. 43 ›› Issue (3): 30502-030502.doi: 10.11889/j.0253-3219.2020.hjs.43.030502

• NUCLEAR PHYSICS, INTERDISCIPLINARY RESEARCH • Previous Articles    

Criticality safety analysis of CNSC spent fuel assembly transport container

Min ZHANG1,Jing WANG2(),Zhe HONG1,Xiaolong LI1,Liang ZHANG1,Yuting PAN1   

  1. 1.Nuclear and Radiation Safety Center, Ministry of Ecology and Environment, Beijing 102445, China
    2.The Support Center of China Atomic Energy Agency, Beijing 100080, China
  • Received:2019-10-10 Revised:2020-02-12 Online:2020-03-15 Published:2020-03-24
  • Contact: Jing WANG E-mail:wangjing_ns@163.com
  • About author:ZHANG Min, male, born in 1982, graduated from China Institute of Atomic Energy with a master’s degree in 2009, focusing on review of nuclear material transportation and nuclear material control

Abstract: Background

Critical safety index, as an important safety indicator for the transport container of spent fuel assembly, needs to be calculated and analyzed to determine whether it meets regulatory standards.

Purpose

This study aims to analyze whether the critical safety design of the spent fuel assembly transport container of China national nuclear corporation (CNSC) meets the requirements of the “Regulations for the Safe Transport of Radioactive Material”.

Methods

The conservative critical calculation model was constructed by using Monte Carlo programs. The critical calculation of the spent fuel assembly transport container of the CNSC under normal and accident conditions was carried out, Both the overall effective multiplication coefficient, i.e.,keff, and the critical safety index were analyzed.

Results

The analysis results show that the maximumkeff of a single package and package array is 0.804 25 under normal conditions, which is less than the subcritical limit and the critical safety index is 0; the maximumkeff of a single package and package array under the accident conditions is 0.813 17, which is also less than the subcritical limit and the critical safety index is 0.

Conclusion

Under normal and accident conditions, the maximumkeff of the CNSC spent fuel assembly transport container is less than the subcritical limit of 0.94, and the critical safety index is 0, which meets the requirements of regulatory standards.

Key words: CNSC transport container, Critical safety analysis, Critical safety index

CLC Number: 

  • TL731