A method, apparatus, device, and medium for protecting a nuclear power plant reactor

Through real-time monitoring and automatic response mechanisms, the problem of uncontrollable water level during cold shutdown of nuclear power plants for maintenance was solved, and the safe maintenance of coolant water level and continuous extraction of residual heat were achieved, ensuring the safe operation of the reactor during accidents.

CN119480191BActive Publication Date: 2025-10-10CHINA NUCLEAR POWER ENGINEERING COMPANY LTD +2
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Patent Information

Application Number
CN202411627320.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-14
Publication Date
2025-10-10
Estimated Expiration
2044-11-14

AI Technical Summary

Technical Problem

When a nuclear power plant is in a cold shutdown state for maintenance, the water level in the reactor pressure vessel cannot be controlled due to excessive discharge from the chemical and volume control systems, causing the reactor protection system to fail and unable to replenish water in time, posing a safety hazard of an exposed core.

Method used

By real-time monitoring of the water level in the reactor pressure vessel, using the diversity drive system to send a protection signal, starting the safety injection system to replenish coolant, and isolating the downstream path, combined with the downstream isolation function of the chemical and volume control system, the water level is ensured to be within a safe range.

Benefits of technology

Effectively maintain the coolant water level within a safe range, prevent core exposure, avoid potential meltdown risks, ensure that the waste heat removal pump operates at an appropriate water level, and improve accident response efficiency and system safety.

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Abstract

The application provides a nuclear power plant reactor protection method, device, equipment and medium, and the method comprises the following steps: acquiring water level data in a reactor pressure vessel in real time; issuing a low water level signal when the water level data is lower than a preset low water level; issuing a protection signal according to the low water level signal; and according to the protection signal, a safety injection system supplements a coolant into the reactor pressure vessel, and a letdown isolation function of a chemical and volume control system is started. Through the nuclear power plant reactor protection method, device, equipment and medium provided by the application, the reactor core can be supplemented with water in the case that the reactor protection system fails.
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