Study on Optimization Design of Fuel Assembly under Low Flow Condition

Zheng Xiao; Luo Hanyu; Du Peng; Qiu Zhifang; Tian Ye

doi:10.13832/j.jnpe.2022.01.0022

Volume 43 Issue 1

Feb. 2022

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Zheng Xiao, Luo Hanyu, Du Peng, Qiu Zhifang, Tian Ye. Study on Optimization Design of Fuel Assembly under Low Flow Condition[J]. Nuclear Power Engineering, 2022, 43(1): 22-27. doi: 10.13832/j.jnpe.2022.01.0022

Citation:

Zheng Xiao, Luo Hanyu, Du Peng, Qiu Zhifang, Tian Ye. Study on Optimization Design of Fuel Assembly under Low Flow Condition[J]. Nuclear Power Engineering, 2022, 43(1): 22-27. doi: 10.13832/j.jnpe.2022.01.0022

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Study on Optimization Design of Fuel Assembly under Low Flow Condition

doi: 10.13832/j.jnpe.2022.01.0022

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

Received Date: 2021-01-06
Rev Recd Date: 2021-07-15
Publish Date: 2022-02-01

Abstract

Abstract

In order to explore the optimization design of fuel assembly for modular small reactor (SMR), in this paper, the thermal-hydraulic performance of truncated CF2 fuel assembly under the range of SMR parameters is analyzed and studied, and the influence law of the spacing and layout of mixing grid on the thermal-hydraulic performance of fuel assembly is obtained. The results show that: ① Under low flow condition, too long or too short spacing of the mixing grid will reduce the thermal performance of the fuel assembly, and the spacing of the mixing grid shall be reasonably considered in the design. ② The arrangement of the mixing grid in the upstream region of the heating section of the fuel assembly is not obvious for improving the thermal performance of the SMR fuel assembly, so the layout shall be simplified in this region. ③ Under normal operation and accident conditions of SMR, the state point parameters of the middle and downstream regions of the fuel assembly are relatively bad. Reasonably designing the spacing and arrangement of the mixing grid in the middle and downstream regions can significantly improve the thermal performance of the fuel assembly and improve the thermal safety margin. The results of this paper can provide a reference for the design optimization of SMR fuel assembly.
- SMR,
- Low flow,
- Fuel assembly,
- Thermal-hydraulic,
- Optimization design

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References(7)

References

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