Reliability Evaluation of NPP’s Power Supply System Based on Improved GO-FLOW Method

Table 1

The improved GO-FLOW method used in NPP’s power supply system.

Item	The existing GO-FLOW method	The improved GO-FLOW method	The quantitative calculation method after being improved
Considering components’ repair rate or not	No	GO-FLOW operator algorithm is improved by introducing repair rate	For example, the success probability of components with two states at time () is as
Considering total signaling or not	No	Synthesize the effect of total signaling	The existing probability of the terminal signal in a system with total signals is as
Considering common cause failure or not	Yes	Yes	At time , the common cause failure probability of a system with repairable components is as
Applicable to complex repairable system with multistates or not	Calculation error	Much more reasonable results	For example, states transition equation of repairable components with three states is as