低功率及停堆工况PSA中的电厂运行状态分析

Plant Operational States Analysis in Low Power and Shutdown PSA

电厂运行状态(POS)分析的目的是将核电厂低功率停堆运行这一连续的动态过程离散化,这是用事件树表示发展事故序列的必要条件。以某300 MW参考核电厂的设计、运行经验、操作规程等基础做为参考,采用相关准则进行详细的POS分析,得到合理的POS,并根据该参考电厂实际运行情况计算得到每个POS的持续时间。这项工作为开展低功率及停堆工况PSA奠定了重要的基础,其分析方法和內容为国內开展此项工作提供了参考。

The purpose of Plant Operational States（POS） analysis is to disperse the continuous and dynamic process of low power and shutdown operation,which is the basis of developing event tree models for accident sequence analysis.According to the design of a 300 MW Nuclear Power Plant Project,operating experience and procedures of the reference plant,a detailed POS analysis is carried out based on relative criteria.Then,several kinds of POS are obtained,and the duration of each POS is calculated according to the operation records of the reference plant.The POS analysis is an important element in low power and shutdown PSA.The methodology and contents provide reference for POS analysis.