Cofrentes Nuclear Power Plant in Spain Automatically Shuts Down Due to Power Supply Failure

en.Wedoany.com Reported - On October 7, an unplanned shutdown occurred at the Cofrentes Nuclear Power Plant in the Province of Valencia, Spain, caused by a failure of a power supply unit in the main control room, which led to the closure of the turbine main steam control valve and triggered the reactor protection system. The plant operator submitted an event report to the Spanish Nuclear Safety Council (CSN) at 3:30 a.m. that day. The regulatory body confirmed that the unit had entered a stable Mode 3 (hot shutdown) state, and the event had no impact on workers, the public, or the environment.

The faulty power supply is located in the main control room of the nuclear power plant and is responsible for supplying power to the actuating components of multiple safety systems. The power supply anomaly generated multiple equipment actions and control signals, triggering responses from multiple safety systems and related equipment, including the closure of the turbine main steam control valve. Subsequently, the reactor protection system was activated, and the unit automatically shut down.
After the shutdown, the plant operators inspected the unit's systems and key operating parameters and conducted multiple rounds of inspections across the plant site. The event report submitted to the regulatory body confirmed that the relevant inspections found no other anomalies, and the reactor remained in a stable hot shutdown state. The regulatory document did not list the specific model of the faulty power supply unit, replacement arrangements, or the expected time for the unit to resume operation.
This event was reported in accordance with the nuclear power plant event reporting procedure stipulated in IS-10 of the Spanish Nuclear Safety Council, and falls under the category of events requiring reporting within four hours. The regulatory body has received the preliminary report submitted by the operator and is evaluating the event. As of the regulatory document issued on October 7, the international nuclear and radiological event scale rating for this event has not yet been completed, and the official rating remains to be determined.