核电站概率安全评价(PSA)表明,相同部件冗余系统的共因失效时常比独立失效对系统不可用度贡献还大,因此,对共因失效的研究成为近十年来国际上热门的课题。虽然已有大量的文章发表,但对防御共因失效对策的研究文章甚少。这里简单地描述防御对策有效性估计模型 Probability and safety evaluation (PSA) of nuclear power plants shows that the common cause failure of redundant systems with the same components often contributes more to the unavailability of systems than independent failures. Therefore, the study of common cause failures has become a hot topic in the world over the past decade. Although a large number of articles have been published, there are few articles on the countermeasures of defensive common cause failure. Here is a brief description of the effectiveness of defense strategy estimation model