Reliability Assessment of RIC Neutron Flux Measurement System

Abstract

Abstract Nuclear power core neutron flux measurement system is a special tool for real-time accurate measurement of nuclear reactors, which requires not only high technically demanding, but also has high requirements for reliability. Compared with the advanced level in foreign countries, there is still a certain gap between the reliability and stability of domestically produced products. Taking the prefabricated water level monitoring system as an example, this paper adopts the risk priority number method to carry out the failure mode and impact analysis, and divides the system into various agreements. Level, a detailed analysis of all possible failure modes, causes of failure, severity of consequences, probability of occurrence, and degree of damage. Meanwhile, the reliability prediction model is established to carry out quantitative analysis. According to the fmea result and the reliability prediction model, more serious failure modes and modules with higher failure rate are discussed. Based on this, the design improvement direction of the water level monitoring system of the core operation state monitor is proposed.