The Kansai Electric Power Company,Incorporated [9503.T]
TOKYO, May 08 (Pulse News Wire) – The Kansai Electric Power Company,incorporated (9503.T) manually stopped its Unit 3 reactor at the Mihama Nuclear Power Plant on May 08, 2026, at 04:24 AM due to a steam leak detected via surveillance cameras around the high-pressure turbine area. At approximately 04:10 AM, an alarm was triggered indicating a significant temperature difference in the upper and lower parts of the high-pressure turbine enclosure.
The leak was confirmed to have ceased by 04:43 AM. Further investigation into the cause of the incident is planned. According to the company, this was a secondary system steam leak and there is no environmental radiation impact.
Any potential effects on operations or performance will be disclosed promptly if identified. The detailed diagram shows the location of the steam generation facility and the high-pressure turbine enclosure split into upper and lower sections, which were monitored for temperature differences. The alert indicated a lower temperature in the upper part compared to the lower part.
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