Preliminary reasons for malfunction after the restart of Japan's largest nuclear power plant announced.

On January 29th local time, Tokyo Electric Power Company announced the progress of the investigation into the alarm malfunction related to the control rod after the restart of Unit 6 of the Kashiwazaki-Kariwa Nuclear Power Plant, Japan. It is preliminarily inferred that the cause of the accident lies in the combination setting between the inverter and the control rod driving device. Regarding the subsequent operation arrangements for the transition of Unit 6 of the Kashiwazaki-Kariwa Nuclear Power Plant to commercial operation, plant manager Takeshi Inagaki stated that they would reevaluate and adjust based on the results of the investigation into this malfunction. The Kashiwazaki-Kariwa Nuclear Power Plant, Japan's largest nuclear power plant, is operated by Tokyo Electric Power Company and has been in a state of shut down since the 2011 "3.11" Great East Japan Earthquake. On the 21st, Tokyo Electric Power Company restarted Unit 6 of the Kashiwazaki-Kariwa Nuclear Power Plant. On the 22nd, just less than a day after the restart, an alarm sounded during the control rod withdrawal operation of Unit 6, causing the withdrawal operation to stop. Subsequently, Tokyo Electric Power Company stated that the unit has been temporarily shut down for investigation of the cause of the malfunction.