Study on Flow Blockage Accident of HFETR Multi-layer Annular Fuel Assembly

Liu Wenbin; Deng Caiyu; Song Jiyang; Xiang Yuxin; Kang Changhu; Liu Chang; Song Yuge; Guo Yufei

doi:10.13832/j.jnpe.2022.06.0117

Volume 43 Issue 6

Dec. 2022

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Article Navigation > Nuclear Power Engineering > 2022 > 43(6): 117-121

Liu Wenbin, Deng Caiyu, Song Jiyang, Xiang Yuxin, Kang Changhu, Liu Chang, Song Yuge, Guo Yufei. Study on Flow Blockage Accident of HFETR Multi-layer Annular Fuel Assembly[J]. Nuclear Power Engineering, 2022, 43(6): 117-121. doi: 10.13832/j.jnpe.2022.06.0117

Citation:

Liu Wenbin, Deng Caiyu, Song Jiyang, Xiang Yuxin, Kang Changhu, Liu Chang, Song Yuge, Guo Yufei. Study on Flow Blockage Accident of HFETR Multi-layer Annular Fuel Assembly[J]. Nuclear Power Engineering, 2022, 43(6): 117-121. doi: 10.13832/j.jnpe.2022.06.0117

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Study on Flow Blockage Accident of HFETR Multi-layer Annular Fuel Assembly

doi: 10.13832/j.jnpe.2022.06.0117

Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2021-11-16
Rev Recd Date: 2022-03-29
Publish Date: 2022-12-14

Abstract

Abstract

The fuel assembly of High Flux Engineering Test Reactor (HFETR) adopts multi-layer annular narrow slot flow channel design to improve the heat transfer capacity. However, it should be noted that the narrow slot flow channel is more likely to be blocked. In this paper, the HFETR fuel assembly model is established based on the RELAP5 program. The comparison between the calculated value and the experimental value shows that the model is reasonable and accurate. Based on the model, the transient characteristics and influencing factors of hot box fuel assembly under flow blockage accident are studied. The results show that: ① When the flow blockage ratio is greater than 0.5, the peak temperature of fuel cladding and core increases significantly with the increase of flow blockage ratio; ② Even if a single flow channel is blocked completely, due to the cooling of the surrounding flow channels, the maximum peak temperature of the fuel cladding is only 218.6 ℃, which can ensure the integrity of the fuel cladding; ③ The flow rate and other parameters fluctuate greatly at the initial stage of a single flow channel full blockage accident, but the main parameters of the fuel assembly are basically stable 15 s after the accident.
- RELAP5,
- Multi-layer annular narrow slot flow channel,
- Flow blockage accident,
- High Flux Engineering Test Reactor (HFETR)

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References(7)

References

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