Core power density distribution determining method for monitoring e.g. critical heat flux ratio, in pressurized water reactor, involves determining new power density distribution by adjusting power density distribution with measurements

摘要

The method involves determining power density distribution of a core of a nuclear reactor from operating parameter values of the reactor by utilizing a neutron calculation code instantaneously resolving a diffusion equation and updating an isotope balance of the core during exhausting of fuel. A new power density distribution is determined by adjusting the power density distribution with measurements delivered by neutron flux measurement detectors and temperature measurement thermocouples, where the detectors are arranged outside a tank of the reactor. An independent claim is also included for a computer program comprising instruction to perform a method for determining power density distribution of a core of a nuclear reactor.