Research on Unloading Instruction Design Technology of Diesel Generators in HPR1000 Nuclear Power Plant
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摘要: 专设安全设施驱动系统在核电厂发生事故时用于对事故后果的缓解，对核电厂安全起着至关重要的作用，柴油发电机组卸载指令可能会阻止专设安全设施的正常动作，但是目前对于柴油发电机组卸载指令无明确的设计准则、无确定的拒动率和误动率指标要求。针对该问题，采用确定论和概率论方法对柴油发电机组卸载指令的设计原则、可靠性要求、定期试验设计等方面开展深入研究，针对三代核电厂华龙一号提出了柴油发电机组卸载指令的设计要求，并设计了柴油发电机组卸载指令总体技术方案，最后分别采用故障树和马尔可夫可靠性分析方法进行了验证，验证结果表明所提出的设计要求合理，指令设计方案可靠性高，该研究内容为后续核电厂仪控系统设计提供了重要参考。Abstract: Engineered safety features actuation system is used to mitigate the consequences of accidents in nuclear power plants, which plays a vital role in the safety of nuclear power plants. The spurious triggering of unloading instruction of diesel generators may prevent the normal operation of engineered safety features. However, currently there are no clear design criteria and specific requirements for the mis-operation failure rate and mal-operation failure rate indicators for the unloading instruction of diesel generators. Therefore, an in-depth research on the design principles, reliability requirements and periodic test design of the unloading instruction of diesel generators is conducted based on the deterministic and probabilistic analysis. Then the design requirements for the unloading instruction of diesel generators are proposed, and the overall technical scheme for the unloading instruction of diesel generators is designed for the third generation nuclear power plant HPR1000. Finally, the fault tree and Markov reliability analysis methods are used for verification. The verification results show that the proposed design requirements are reasonable and the instruction design scheme has high reliability. This research provides an important reference for the design of subsequent nuclear power plant I&C system.
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Key words:
- Engineered safety features /
- Diesel generators /
- HPR1000 /
- Fault tree /
- Markov
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图 1 岭澳核电站二期柴油发电机卸载指令结构
Figure 1. Unloading Instruction Structure of Diesel Generators in Ling’ao PhaseⅡ Nuclear Power Plant
图 3 柴油发电机组卸载指令故障树模型
Figure 3. Fault Tree Model of Diesel Generators Unloading Instruction
图 4 柴油发电机组卸载指令状态转移图
Figure 4. State Transition Diagram of Diesel Generators Unloading Instruction
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