Kansai Electric Power Company said the reactor at Ohi Nuclear Power Station Unit 3 automatically shut down on the night of August 8, 2026, after a “Loss of Field” alarm triggered a generator trip.
The company said the cause of the incident is under investigation. It also confirmed that there has been no radiological impact on the surrounding environment.
The event underscores operational risks within Kansai Electric’s nuclear fleet, as a problem related to generator excitation led to a full reactor trip. The company said it will disclose any further developments, including any potential impact on business performance.
The incident is expected to draw continued regulatory and investor attention to the reliability and safety of Kansai Electric’s nuclear facilities.
