Study on Reactivity Disturbance Characteristics of SCO<sub>2</sub> Reactor Assembly Caused by Burnable Poisons

Zong Yi; Zhuang Kun; Lu Di; Qi Shengdong

doi:10.13832/j.jnpe.2023.S2.0153

Volume 44 Issue S2

Dec. 2023

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Zong Yi, Zhuang Kun, Lu Di, Qi Shengdong. Study on Reactivity Disturbance Characteristics of SCO₂ Reactor Assembly Caused by Burnable Poisons[J]. Nuclear Power Engineering, 2023, 44(S2): 153-159. doi: 10.13832/j.jnpe.2023.S2.0153

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Study on Reactivity Disturbance Characteristics of SCO₂ Reactor Assembly Caused by Burnable Poisons

doi: 10.13832/j.jnpe.2023.S2.0153

Zong Yi^1
,,
Zhuang Kun^{1
,
,},
Lu Di²,
Qi Shengdong¹

1.
Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
2.
Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2023-07-11
Rev Recd Date: 2023-09-05
Publish Date: 2023-12-30

Abstract

Abstract

In order to investigate the reactivity disturbance characteristics of supercritical CO₂ reactor assemblies caused by burnable poisons and to obtain a stable and safe reactivity control method, this paper puts forward 7 different burnable poison arrangement models of 2 categories. By studying the reactivity changes of assemblies under different burnable poison loading, the reactivity control methods by adjusting the consumption rate of burnable poisons are obtained according to different arrangements: 1) through the aggregation arrangement of mixing rods; 2) the reactivity can be well controlled by adjusting the H-ratio under a certain arrangement form and loading quantity. For example, when B₄C burnable poison with ¹⁰B enrichment of 3% is loaded with the H ratio of 17.5, the reactivity fluctuation is only 2600 pcm (1 pcm = 10⁻⁵). The influence of combustible toxicant on the reactivity perturbation of supercritical CO₂ reactor assembly is obtained and the reactivity control method is proposed.
- Reactivity,
- Burnable poison,
- Supercritical CO₂,
- Gas-cooled reactors

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References(11)

References

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