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Keyword：Tohoku Electric Power
Kansai Electric Power and Tohoku Electric Power Plan to Participate in Spent Fuel Interim Storage Facility in Mutsu, Aomori Prefecture, Japan
Kansai Electric Power Co. and Tohoku Electric Power Co. have expressed their intention to participate in the use of the spent fuel interim storage facility located in Mutsu, Aomori Prefecture, northeastern Japan. Currently, the interim storage facility only accepts spent fuel from nuclear power plants of Tokyo Electric Power Company Holdings (TEPCO) and Japan Atomic Power Co. After the mayor of Mutsu agreed to consider allowing the facility to accept spent fuel from other electric power companies, the situation underwent a major shift. Subsequently, Tokyo Electric Power Company and Japan Atomic Power Co. reached out to the other eight electric power companies in Japan that operate nuclear power plants to solicit their interest in jointly participating in the use of the interim storage facility.
2026-09-16
Japan's Onagawa Nuclear Power Station Unit 2 Plans to Replace Hydrogen Concentration Monitoring Equipment
Tohoku Electric Power has consulted with Miyagi Prefecture, Ishinomaki City, and Onagawa Town in advance regarding a change to the method of monitoring hydrogen concentration inside the containment vessel under severe accident conditions at Unit 2 of the Onagawa Nuclear Power Station. The company plans to submit an application to amend the reactor installation license to the Nuclear Regulation Authority (NRA) of Japan on the 2nd. Unit 2 of the Onagawa Nuclear Power Station is located in Onagawa Town and Ishinomaki City, Miyagi Prefecture. Tohoku Electric Power previously installed a total of four hydrogen concentration detectors inside and outside the reactor containment vessel of this unit, intended to monitor changes in hydrogen concentration within the containment vessel in the event of a severe accident. In 2025, some of these detectors experienced malfunctions. In the same year...
2026-09-02
Radiation detector malfunction at Unit 2 of Japan's Onagawa Nuclear Power Plant causes hundreds of abnormal reading fluctuations
Tohoku Electric Power Company of Japan announced on August 6 that a detection equipment malfunction occurred at Unit 2 of the Onagawa Nuclear Power Plant, located in Onagawa Town and Ishinomaki City, Miyagi Prefecture. The issue involved detectors used to measure radiation levels in the main steam lines, which transport steam generated by the reactor to the turbine. Among the four detectors, one displayed readings in the central control room that surged and dropped sharply, repeating hundreds of times. Based on publicly available information, Tohoku Electric has classified this incident as a detector malfunction rather than an abnormal release of radioactive materials or a sudden change in reactor operating conditions. The company stated that the situation does not constitute a problem under security regulations, meaning that from...
2026-08-07