核电站安全级数字化保护系统功能分配设计研究

Research on Function Assignment Design of Digital Nuclear Power Plant Safety Protection System

为保证可靠性,有效克服单一故障和共因故障影响,核电站安全级数字化保护系统设计过程中必须充分考虑系统多样性和纵深防御设计,并有效实现安全功能分散、优化单站负荷及接口。本文论述了核电站安全级数字化保护系统的结构、功能,并依据相关标准要求给出了核电站安全级数字化保护系统的功能分配原则和方法,同时结合一种典型的数字化保护系统功能分配做了分析。

To ensure reliability and to effectively overcome the influence caused by single failure and common cause failure, we must fully consider diversity and defence in depth when designing digital safety IC protection system in nuclear power plant,and effectively implement safety function distribution, optimization of CPU load and interfaces . This article addresses the safety structure and function of digital IC protection systems in nuclear power plant, and presents the safety function distribution principles and methods of digital protection systems according to related standards requirements of the nuclear power plant. Meanwhile, we analyzes the function assignment of one typical digital protection system.