METHOD FOR MONITORING A NUCLEAR CORE COMPRISING A RELAXATION OF A THRESHOLD, AND ASSOCIATED PROGRAMME, SUPPORT AND NUCLEAR REACTOR

摘要

A method is for monitoring a nuclear reactor comprising a core in which fuel assemblies are loaded, each assembly comprising nuclear fuel rods each including nuclear fuel pellets and a cladding surrounding the pellets. The method includes determining (100) at least one operating time limit (TFPPI) for the extended reduced power operation of the reduced power nuclear reactor, so as to avoid a rupture of at least one of the claddings, operating (102) the nuclear reactor at reduced power for an actual time strictly less than the time limit (TFPPI), and relaxing (104) at least one threshold for protecting the nuclear power plant as a function of a difference between the time limit (TFPPI) and the actual time.