CONTROL METHOD FOR A PRESSURISED-WATER NUCLEAR REACTOR

摘要

A pressurised water reactor is controlled by means of rods when a control parameter departs from a specified range. The absorbing control rods (1a, 1b,.., 6b) having an anti-reactivity sufficient to compensate all the variations of reactivity taking place in the course of the normal operation of the reactor and in the event of an incident requiring the emergency shut- down of the reactor while the coolant is at its normal operating temperature - when the control parameter departs from the dead band and/or the deviation of the axial power distribution exceeds a reference value - a determination is made, by a simulation process, of those of the rods which must be displaced so as to return the said control parameter and/or the said deviation to their normal values while minimising an enthalpy increase factor within the core.