Shimane Nuclear Power Station Unit 2 restarted and reached criticality

Chugoku Electric Power Co. announced on August 13 that it started up the reactor of Unit 2 at the Shimane Nuclear Power Station at 10:00 that day, and the unit reached a critical state at 12:14.

Unit 2 of the Shimane Nuclear Power Station is a boiling water reactor with a rated electrical output of 820,000 kilowatts. Criticality refers to the state in which nuclear fission reactions in the reactor core can be sustained, and is one of the key milestones in the unit restart process.

According to the plan, the unit will resume power generation, i.e., synchronize the generator to the grid, on August 18, 2026, and is expected to resume commercial operation on September 16, 2026.

Chugoku Electric Power Co. stated that it will continue to prioritize safety and steadily advance all subsequent procedures.