核电安全级数字化仪控系统内存诊断设计与实现

Design and Implementation of Memory Diagnosis of Nuclear Power Safety Digital I&C System

核电厂数字化仪控系统根据标准要求需要对内存进行诊断。为了解决物理内存地址操作问题,提高内存诊断覆盖率,并提升诊断效率,设计了一种基于实时操作系统的内存诊断方法。采用March C-算法,诊断范围可覆盖全部内存,在不影响操作系统中其他进程执行的情况下,能够快速、安全地检测内存。该方法已经应用在防城港核电厂3#、4#机组的事故后监视系统中,对我国后续核电厂数字化仪控系统的开发具有借鉴和指导意义。

The digital I&C system of nuclear power plant needs to diagnose the memory according to the requirements of the standard.In order to solve the problem of physical memory address operation,improve the memory diagnosis coverage,and improve the diagnosis efficiency,a memory diagnosis method based on real-time operating system is designed.Using the March C-algorithm,the diagnosis range can cover all the memory,and the memory can be tested quickly and safely without affecting the operation of other application software in the operating system.This method has been applied to the post-accident monitoring system of Fangchenggang nuclear power plant No.3 and No.4 units,and has reference and guiding significance for the development of my country’s subsequent nuclear power plant I&C system.