Control of nuclear reactor power plant on occurrence of rupture in coolant tubes

This patent describes the method of controlling the operation of a nuclear-reactor plant on the occurrence of rupture in the coolant channel of the steam generator which rupture raises the level of the liquid in the steam generator. The method includes the steps of: (a) monitoring the level of the liquid in the vaporizing means of the steam generator, and (b) when the level reaches a predetermining height, conducting the liquid to the pressurizer relief tank of the nuclear reactor plant to maintain the liquid in the vaporizing means at a predetermined level at which flooding of the steam line of the steam generator is precluded. It also describes the method of claim 1 wherein the monitoring step includes the additional substeps of enabling an alarm when the liquid in the vaporizing means reaches a first predetermined level below the predetermined height. It enables the conduction of the liquid to the pressurizer relief tank when the predetermined height is reached, a predetermined time interval after the enabling of the alarm in the event of a rupture in the channel