The research on characteristics and differences of AP1000 radiation monitoring system

AP1000 is an important one of the third generation of nuclear reactors. Its subtraction design concept has significant differences with existing nuclear reactors, so we need to do further research. This paper introduces the characteristics of the radiation monitoring system of AP1000 firstly, then compares with CPR1000's radiation monitoring system in the test evaluation, standard system, security classification, functional classification and other aspects, then analysis the differences. It can conclude that the AP1000's design has improvements to CPR1000's, increasing the security and the stability of radiation monitoring system. (authors)