百万千瓦级压水堆核电厂低温水密实超压保护改进

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Improvement of Overpressure Protection in Cold Solid Condition for 1000MWe PWR NPP

China Nuclear Power Technology Research Institute, Shenzhen, Guangdong, 518026, China

摘要: 针对百万千瓦级压水堆核电厂低温水密实超压保护提出改进方案,即在低温水密实状态下调低稳压器安全阀的开启/关闭压力整定值,由稳压器安全阀和余热排出系统(RRA)安全阀一起对反应堆冷却剂系统(RCP)提供双重的低温超压保护。RRA正常运行时由RRA安全阀提供超压保护,如果RRA安全阀因隔离而不可用,则由稳压器安全阀提供后备的超压保护。分析结果表明,稳压器安全阀可以在低温水密实状态下对RCP提供有效的超压保护,从而确保RCP压力边界的完整性。
- 压水堆核电厂 /
- 低温水密实 /
- 超压 /
- 改进 /
- 稳压器安全阀 /
- 完整性
Abstract: An improvement project of overpressure protection in cold solid condition for 1000MWe PWR NPP is proposed,i.e.combined with the RRA safety valves,PSVs are used to provide dual overpressure protection by lowering the pressure setpoints for opening and closing.Normally,the overpressure protection is implemented by the RRA safety valves,while in case of RRA isolated,PSVs are used to provide back-up protection in place of the RRA safety valves.The analysis results show that PSVs can provide effective overpressure protection in cold solid condition,consequently ensure the integrity of RCP pressure boundary.
- PWR NPP /
- Cold solid condition /
- Overpressure /
- Improvement /
- PSVs /
- Integrity