Analysis of Station Blackout Accident in Nuclear Power Plant Based on Dynamic Event tree

Chen Haoyin; Wang He; Zhao Qiang; Li Lei; Wang Longcong

doi:10.13832/j.jnpe.2024.05.0192

Volume 45 Issue 5

Oct. 2024

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Article Navigation > Nuclear Power Engineering > 2024 > 45(5): 192-198

Chen Haoyin, Wang He, Zhao Qiang, Li Lei, Wang Longcong. Analysis of Station Blackout Accident in Nuclear Power Plant Based on Dynamic Event tree[J]. Nuclear Power Engineering, 2024, 45(5): 192-198. doi: 10.13832/j.jnpe.2024.05.0192

Citation:

Chen Haoyin, Wang He, Zhao Qiang, Li Lei, Wang Longcong. Analysis of Station Blackout Accident in Nuclear Power Plant Based on Dynamic Event tree[J]. Nuclear Power Engineering, 2024, 45(5): 192-198. doi: 10.13832/j.jnpe.2024.05.0192

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Analysis of Station Blackout Accident in Nuclear Power Plant Based on Dynamic Event tree

doi: 10.13832/j.jnpe.2024.05.0192

College of Nuclear Science and Technology, Harbin Engineering University, Harbin, 150001, China

Received Date: 2023-11-16
Rev Recd Date: 2024-05-24
Publish Date: 2024-10-14

Abstract

Abstract

Traditional event tree analysis ignores the dynamic time parameters and heavily relies on expert judgement. To tackle these issues, this study utilizes dynamic event tree (DET) method to to establish a response model for station blackout (SBO) accidents of China's improved three-loop PWR (CPR1000) nuclear power plant. Time-dependent branching is established for branch nodes such as turbine-driven auxiliary feedwater system and AC power recovery, and the accident branching results are comprehensively simulated, and the branching probability and the failure probability of core damage under SBO accident are calculated. The calculation results show that different running time of turbine-driven auxiliary feedwater system and recovery time of AC power supply have obvious influence on the accident consequences. The increase of running time of turbine-driven auxiliary feedwater system can prolong the time window of power supply recovery, but there is an upper limit for power supply recovery time, beyond which core damage is inevitable. Compared with the failure probability calculated by the traditional event tree, the dynamic event tree method reduces the failure probability value and develops the potential safety margin.
- Dynamic event tree (DET),
- Station blackout (SBO),
- Dynamic method,
- Branch modelling

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References

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