Abstract: A method for monitoring a nuclear plant includes, for each steam generator from among a plurality of steam generators and for at least one of the parameters of a set of parameters representative of operating of the steam generator, determining a deviation between a measured value of the parameter for this steam generator and the average value of this parameter for all the steam generators to detect an imbalance of this parameter on the steam generator; and characterizing the imbalance as a function of one or more other parameters in the set of representative parameters, so as to generate a physical problem signal or a measurement drift signal.

Abstract: A control method and system for controlling a nuclear power plant includes, in the absence of detection of an imbalance between a primary power signal (S1) and a secondary power signal (S2), the implementation of a setpoint-following mode. The nuclear power plant is controlled as a function of an operational power setpoint (COP), and in the event of detection of an imbalance, automatically implementing a power-limiting mode, including the calculation of a target equilibrium power (PEC) less than or equal to the primary power (P1) and less than or equal to the secondary power (P2), and controlling the nuclear power plant (2) as a function of the target equilibrium power (PEC).

Abstract: A magnitude such as a liquid level in an industrial process is controlled by a known type control system. Models of the process and the control system ar used to correct an input set point signal [SCN] before it is fed to the control system. The invention applies, for example, to controlling the feed water level in a steam generator of a pressurized water reactor type nuclear power plant boiler.