Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (12): 173 doi: 10.1007/s41365-018-0516-8

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Stress analysis of the TMSR graphite component under irradiation conditions

Xiong Yang 1,2 • Yan-Tao Gao 1 • Yang Zhong 1,2 • Dong Ding 1,2 • Derek-Kwong-Lai Tsang 1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2 University of Chinese Academy of Science, Beijing 100049, China
  • Contact: Derek-Kwong-Lai Tsang
  • Supported by:

    This work was supported by the ‘‘Hundred Talent Program’’ of the Chinese Academy of Sciences, the Ministry of Human Resources and Social Security (No. Y419016031), and the Strategic Priority Research Program of Chinese Academy of Science (No. XDA02040100).

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Xiong Yang, Yan-Tao Gao, Yang Zhong, Dong Ding, Derek-Kwong-Lai Tsang. Stress analysis of the TMSR graphite component under irradiation conditions.Nuclear Science and Techniques, 2018, 29(12): 173     doi: 10.1007/s41365-018-0516-8


TMSR uses nuclear graphite as a neutron moderator, a reflector, and the structural material, and utilizes molten salt as a coolant. When running normally, the graphite components are immersed in the molten salt. Thus, the nuclear graphite comes into direct contact with the molten salt, which infiltrates the open pores of the nuclear graphite. This infiltration may influence the stress analysis of the graphite component. In this study, a User Material subroutine was used to analyze the stress distribution of the graphite component, both with and without molten salt infiltration. Many influence factors were taken into consideration, such as the dose gradient, the shape of the permeation zone, and the permeation area. The results show that the dose gradient, shape, and area of the permeation zone all significantly influence the stress distribution. Furthermore, the results of the stress analysis indicate that for a regular graphite component with a square cross section, the peak maximum principal stress value occurs at the center of the cross section, and the symmetry of the maximum principal stress distributions was modified by quarter circle and half ellipse permeation zones.

Key words: Nuclear graphite, Stress analysis, Irradiation, Permeation zone