Patent ID: 11942228
Assignee: HITACHI-GE NUCLEAR ENERGY, LTD.
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 9:
10. A method for prediction of reactor water quality of a nuclear reactor in a nuclear power plant by a device, wherein
the device comprises one or more processors,
the device stores a reactor water quality prediction model which is learned using learning data and with which future reactor water quality is predicted, and
an explanatory variable of the reactor water quality prediction model includes a value in a predetermined period unit that is generated from data acquired in an operating nuclear power plant,
the method comprising the steps of:
generating, by the device, the value in a predetermined period unit from data acquired in a target nuclear power plant by calculating, as at least a part of the explanatory variable, a daily metal impurity accumulation amount in the nuclear reactor in the target nuclear power plant based on:
a fuel change history held on a cycle-by-cycle basis; and
a daily supplied water quality measured value;
acquiring, by the device, a first predicted value of the reactor water quality in the target nuclear power plant based on:
the reactor water quality prediction model; and
the value in a predetermined period unit;
receiving, by the device, information of a plurality of countermeasures for improving the reactor water quality; and
upon receiving the information of the plurality of countermeasures:
acquiring other predicted values of the reactor water quality in the target nuclear power plant based on the countermeasures by inputting assumed values for the countermeasures, respectively; and
simultaneously displaying on a display device:
the first predicted value which is not based on a countermeasure; and
the other predicted values which are based on the countermeasures, respectively,
to enable comparison to determine an appropriate countermeasure from the plurality of countermeasures.