Reactor internals and core support monitoring system

This patent describes a method for diagnosing conditions of reactor internals and core support structures in a nuclear reactor. It comprises detecting vibration of reactor internals; receiving signals representing system data including at least two among pressurizer pressure, reactor coolant pump motor current, reactor coolant system pressure, reactor coolant system temperature and reactor coolant system flow rate; and automatically evaluating the vibration of the reactor internals based upon all of the signals received diagnose the condition of the reactor internals and core support structures