Research on Top Peak Flux Problem of Mixed Core with MOX Fuel

Li Songling; Li Tianya; Guo Xingkun; Yu Yingrui; Li Qing

doi:10.13832/j.jnpe.2018.S2.0010

Volume 39 Issue S2

Dec. 2018

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Li Songling, Li Tianya, Guo Xingkun, Yu Yingrui, Li Qing. Research on Top Peak Flux Problem of Mixed Core with MOX Fuel[J]. Nuclear Power Engineering, 2018, 39(S2): 10-14. doi: 10.13832/j.jnpe.2018.S2.0010

Citation:

Li Songling, Li Tianya, Guo Xingkun, Yu Yingrui, Li Qing. Research on Top Peak Flux Problem of Mixed Core with MOX Fuel[J]. Nuclear Power Engineering, 2018, 39(S2): 10-14. doi: 10.13832/j.jnpe.2018.S2.0010

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Research on Top Peak Flux Problem of Mixed Core with MOX Fuel

doi: 10.13832/j.jnpe.2018.S2.0010

Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2018-07-13
Rev Recd Date: 2018-10-30

Available Online: 2025-02-09

Abstract

Abstract

Through detailed modeling and analysis, this paper expounds the phenomenon and reason for the top peak flux. It is found that the top peak flux is widespread in the mixed core with MOX fuel. In order to solve this problem, it is proposed to change the top composition of MOX assembly or UO₂ assembly to reduce the top neutron flux. Calculations show that adding 12～18 cm Gd₂O₃ to the top of the MOX fuel rod is the best solution. Center drilling of MOX fuel can also be another solution.
- MOX fuel,
- Top peak flux,
- Center drilling