Study on Criticality Safety in the Case of Core Water Inlet Accident During Small Mobile Lead-bismuth Reactor Transportation

Guo Jiaxin; Chen Xiaoliang; Chen Xiaoxian; Xu Jianping; Cheng Yuting

doi:10.13832/j.jnpe.2023.01.0032

Volume 44 Issue 1

Feb. 2023

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Guo Jiaxin, Chen Xiaoliang, Chen Xiaoxian, Xu Jianping, Cheng Yuting. Study on Criticality Safety in the Case of Core Water Inlet Accident During Small Mobile Lead-bismuth Reactor Transportation[J]. Nuclear Power Engineering, 2023, 44(1): 32-36. doi: 10.13832/j.jnpe.2023.01.0032

Citation:

Guo Jiaxin, Chen Xiaoliang, Chen Xiaoxian, Xu Jianping, Cheng Yuting. Study on Criticality Safety in the Case of Core Water Inlet Accident During Small Mobile Lead-bismuth Reactor Transportation[J]. Nuclear Power Engineering, 2023, 44(1): 32-36. doi: 10.13832/j.jnpe.2023.01.0032

Citation:

Guo Jiaxin, Chen Xiaoliang, Chen Xiaoxian, Xu Jianping, Cheng Yuting. Study on Criticality Safety in the Case of Core Water Inlet Accident During Small Mobile Lead-bismuth Reactor Transportation[J]. Nuclear Power Engineering, 2023, 44(1): 32-36. doi: 10.13832/j.jnpe.2023.01.0032

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Study on Criticality Safety in the Case of Core Water Inlet Accident During Small Mobile Lead-bismuth Reactor Transportation

doi: 10.13832/j.jnpe.2023.01.0032

China Institute of Atomic Energy, Beijing, 102413, China

Received Date: 2022-03-08
Rev Recd Date: 2022-04-12
Publish Date: 2023-02-15

Abstract

Abstract

For the needs of application scenarios such as islands and remote areas, the safety and feasibility of the whole reactor transportation has become one of the necessary design objectives of small mobile lead-bismuth reactor. Based on the characteristics of small mobile lead-bismuth reactor, the reactivity control method of spectral shift absorber (SSA) is adopted to study the reactivity control scheme to ensure the criticality safety of the whole reactor transportation. MCNP software is used to calculate the effective multiplication factor (k_eff) of fuel rod pellets coated with Gd₂O₃ coating of different thickness during transportation and in case of core water inlet accident, where the coating thickness of 50 μm meets the criticality safety requirements; The burnup characteristics, power distribution and heat transfer of the reactor core after adding SSA are analyzed. The verification shows that it does not affect the normal operation of the reactor core, and the feasibility of this reactivity control scheme is determined.
- Small mobile lead-bismuth reactor,
- Criticality safety of reactor transport,
- Spectral shift absorber

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References(13)

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