核安全2024，Vol.23Issue(2)：17-21,5.
核电厂电动消防水泵检修停役时间延长导致的电厂风险包络评价
Bounding Assessment of the Risk for the Fire Protection Motor Pump Maintenance Outage Time Extension in Nuclear Power Plant
颜珍 1王文升 1高巍1
作者信息
- 1. 核电运行研究(上海)有限公司,上海 200120
- 折叠
摘要
Abstract
Risk-informed decision making can enhance the flexibility of operation and maintenance of Nuclear Power Plant while ensuring safety,avoid unnecessary power reduction and shutdown to reduce the risk of plants during condition transition.In order to support risk-informed decision making for fire protection pump maintenance outage,a study on fire protection motor pump maintenance shutdown time extension risk assessment method was conducted for Nuclear Power Plants that have not developed fire PSA models,and a simplified analysis method of envelope assessment was proposed.Based on the actual situation of a Nuclear Power Plant,combined with consideration of the characteristics of fire PSA,a semi-quantitative envelope risk assessment method was used to perform a detailed system modeling of the fire protection system based on qualitative assessment and screening of the scope and degree of system impact that may result from expected changes,and then combined with this system unavailability and plant fire design characteristics The rate of change of the envelope on the fire risk of the power plant due to the extended maintenance outage time of fire protection motor pump was obtained.This method provides a more intuitive quantitative result for the change of Nuclear Power Plants based on the conventional qualitative evaluation,and greatly saves the workload of re-developing the corresponding PSA model.Through the evaluation of the system availability,it can also pay more attention to the impacts of the change on the system itself,and put forward more targeted countermeasures.关键词
停役时间延长/风险/包络风险评价/核电厂改造Key words
extended outage time/risk/bounding risk assessment/power plant renovation分类
能源科技引用本文复制引用
颜珍,王文升,高巍..核电厂电动消防水泵检修停役时间延长导致的电厂风险包络评价[J].核安全,2024,23(2):17-21,5.
