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Unit 2 of Japan's Shimane Nuclear Power Plant Completes Periodic Inspection and Resumes Commercial Operation After About 7 Months

The Chugoku Electric Power Company (Japanese: 中国電力株式会社), a large integrated electric power company responsible for supplying electricity to 5 prefectures in the Chugoku region of western Honshu, Japan, announced on September 16 that Unit 2 of the Shimane Nuclear Power Plant has successfully completed the periodic inspection that began in February this year and officially resumed commercial operation on the 16th, returning to power supply after about 7 months. According to Chugoku Electric Power's estimate, in the overall power source mix, nuclear power generation will account for about 15% of the company's total power generation for this fiscal year, and this level of generation is expected to meet about 60% of the electricity demand of the two San'in prefectures. In addition, since Unit 2 of the Shimane Nuclear Power Plant has reached 37 years since it began commercial operation, Chugoku Electric Power also collected, during this periodic inspection, data used as the basis for assessing the "special inspection" required for future extended operation beyond the standard service period (exceeding the 40-year operating limit).

2026-09-17

Japan's Mihama Nuclear Power Station Unit 3 Plans Grid Connection on September 15

Kansai Electric Power announced on September 1, 2026, that work related to the periodic inspection of Unit 3 at Japan's Mihama Nuclear Power Station is progressing as planned. Based on the progress of the inspection and the status of corrective measures for the steam leakage issue in the high-pressure turbine, the unit is scheduled to be connected to the grid on September 15. Unit 3 of Mihama Nuclear Power Station is a pressurized water reactor unit with a rated electrical output of 826 MW and a rated thermal output of 2,440 MW. On May 8 this year, the unit underwent a manual reactor shutdown after steam leakage was confirmed in the high-pressure turbine. From June 16, the unit entered its 29th periodic inspection. Kansai Electric Power stated that, in response to the steam leakage in the high-pressure turbine, the upper cylinder sealing cover has been replaced based on the results of the cause investigation, and multiple measures such as the development of relevant guidelines are being advanced.

2026-09-01

Shimane Nuclear Power Station Unit 2 scheduled inspection completion date moved up to September 16

Chugoku Electric Power Co., Inc. announced on August 5 that the schedule for the 18th periodic utility inspection of Shimane Nuclear Power Station Unit 2 has been revised, with the inspection completion date moved up from September 17, 2026 to September 16, and the power generation resumption date moved up from August 19 to August 18. Shimane Nuclear Power Station Unit 2 is a boiling water reactor unit with a rated electrical output of 820 MW. The unit was shut down on February 9, 2026 and entered its 18th periodic utility inspection. The reason for this adjustment is that, during the reactor start-up preparation work, the procurement of the nitrogen gas source used to fill the reactor containment vessel was completed earlier than planned, allowing the related work to be advanced accordingly...

2026-08-05