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US 2025/0166858 A1Published application
Plant reliability evaluation system, plant reliability evaluation method, and plant reliability evaluation program
AssigneeHitachi-GE Nuclear Energy, Ltd.
InventorsTsuyoshi ITOU, Yoichi WADA, Shinobu OKIDO, Nobuyuki OTA, Ryosuke SHIMIZU, Naoyuki KONO
Life of this patent
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Abstract
A plant reliability evaluation system includes: a detector that detects environmental information of a plant during operation; and a health monitor that constantly monitors health of equipment constituting the plant based on the environmental information during operation and importance information of the equipment constituting the plant.
Claims11
A plant reliability evaluation system comprising:
- a corrosion potential sensor that measures a corrosion potential in water quality of a lower plenum region of a reactor;
- a water quality measuring device that measures a hydrogen concentration in reactor water of the reactor;
- a dose rate monitor that measures a dose rate of piping of the reactor;
- a health monitor that constantly monitors health of equipment constituting a plant based on the corrosion potential, the hydrogen concentration, and the dose rate, which are environmental information of the plant during operation, as well as on importance information of the equipment constituting the plant;
- and
- a preventive maintainer that, based on health evaluation results of the equipment during operation by the health monitor, instructs preventive maintenance for the equipment, and adjusts the amount of hydrogen injected to feedwater of the reactor by a hydrogen injection device so that the corrosion potential decreases to a target value while monitoring the dose rate, thereby adjusting the hydrogen concentration in the reactor water of the reactor.
3 more elements
(canceled)
A plant reliability evaluation system comprising:
- a corrosion potential sensor that measures a corrosion potential in water quality of a lower plenum region of a reactor;
- a water quality measuring device that measures a hydrogen concentration in reactor water of the reactor;
- a dose rate monitor that measures a dose rate of piping of the reactor;
- a health monitor that constantly monitors health of equipment constituting a plant based on the corrosion potential, the hydrogen concentration, and the dose rate, which are environmental information of the plant during operation, as well as on importance information of the equipment constituting the plant;
- and
- a preventive maintainer that, based on health evaluation results of the equipment during operation by the health monitor, instructs preventive maintenance for the equipment, and adjusts the amount of hydrogen injected to feedwater of the reactor by a hydrogen injection device so that the corrosion potential decreases to a target value while monitoring the dose rate, thereby adjusting the hydrogen concentration in the reactor water of the reactor.
3 more elements
A plant reliability evaluation program that causes a computer to execute procedures of:
- measuring, by a corrosion potential sensor, a corrosion potential in water quality of a lower plenum region of a reactor;
- measuring, by a water quality measuring device, a hydrogen concentration in reactor water of the reactor:
- measuring, by a dose rate monitor, a dose rate of piping of the reactor;
- constantly monitoring health of equipment constituting a plant based on the corrosion potential, the hydrogen concentration, and the dose rate, which are environmental information of the plant during operation, as well as on importance information of the equipment constituting the plant;
- instructing preventive maintenance for the equipment based on health evaluation results of the equipment during operation;
- and
- adjusting the amount of hydrogen injected to feedwater of the reactor by a hydrogen injection device so that the corrosion potential decreases to a target value while monitoring the dose rate, thereby adjusting the hydrogen concentration in the reactor water of the reactor.
4 more elements
Dependencies are inferred from the claim text.