先进压水堆核电厂多样性驱动系统需求分析结构

Hiberarchy of Requi rement Analysis on Diversity Actuation System for Advanced Pressurized Water Reactor Nuclear Power Plant

核电厂数字化应用需应对软件可能的共因失效所带来的问题。多样性驱动系统（DAS）用于数字化保护系统软件共因失效（CCF）时缓解和抵御核电厂发生设计基准事件的后果。本研究在核电厂纵深防御与多样性原则的指导下，对先进压水堆核电厂的多样性驱动系统需求进行分析研究，阐明了先进压水堆核电厂多样性驱动系统的设计特性、过程、依据、方法及系统结构。

The digital systems applied to nuclear power plants need to address the problems created by common‐cause failure （CCF） of the software .The diversity actuation system （DAS） can resist and relieve accident consequence for nuclear power plant ,when postulated CCF of reactor protection system and design‐basis event take place at the same time .According to the defense‐in‐depth and diversity principles of nuclear power plant ,the requirement analysis of DAS for pressurized water reactor was researched . The design characteristic property ,design process ,design basis ,design methods and system structure of DAS were systematically expounded .