CAJ | 학술논문

N中取 M系统是反应堆保护系统中的冗余设计。通过分析系统拒动率、误动率两个量化指标，得到严格数学公式，并做了近似计算。基于公式，系统解释了工程实际中 N中取 M多为4取2或3取2的基本原理。以非安全故障概率0．1、安全故障概率0．1为例，比较不同取值的判决系统。依据系统拒动率 A、误动率 B，单一模块拒动率 P、误动率 Q，即输入设计参数（A ，B，P，Q），计算得到 N和 M的取值。
N중취 M계통시반응퇴보호계통중적용여설계。통과분석계통거동솔、오동솔량개양화지표，득도엄격수학공식，병주료근사계산。기우공식，계통해석료공정실제중 N중취 M다위4취2혹3취2적기본원리。이비안전고장개솔0．1、안전고장개솔0．1위례，비교불동취치적판결계통。의거계통거동솔 A、오동솔 B，단일모괴거동솔 P、오동솔 Q，즉수입설계삼수（A ，B，P，Q），계산득도 N화 M적취치。
The reliability and availability of the reactor protection system (RPS) can be improved by using M out of N judg-ment system .By analyzing two quantitative indicators ,the rate of refusal to operate and mal-operation rate ,a strict math-ematical formula and an approximate calculation are stated .The differences of a series of judgment systems are discussed on condition that the unsafe failure probability and the security failure probability are both 0 .1 .Based on given parameters (A , B ,P ,Q):A is upper limit of the refusal rate for the RPS , B is upper limit of the mal-operation rate , P and Q are basic protection unit rates corresponding to refusal rate and mal-operation rate ,respectively .According to these parameters ,the values of N and M can be solved .