The Experience Feedback on Pressurizer Heater Abnormality in a New-built Nuclear Power Plant

It is critical that the electrical heater of the pressurizer works normally for PWR.Based on analyses for the heater failure events in a new nuclear power plant and combined with the heater manufacturing and installation process and related engineering test,some important parameters,including filler temperature limits of no more than 140℃,and thermal ageing principle,are found out.It is helpful for providing advices and experience feedback for the usage and maintenance of heaters,and having some instructive meanings for the safe operation of nuclear power plant.