Manual Shutdown of the Reactor at Mihama Power Station Unit 3
The Kansai Electric Power Company,Incorporated (Mihama Power Station Unit 3)
Around the high-pressure turbine at Mihama Power Station Unit 3 (secondary system)
If any matters requiring disclosure, including any impact on business performance, are identified, we will promptly announce them.
Company response
Reactor operation at Mihama Power Station Unit 3 (manual shutdown of the reactor)
An investigation into the cause will be conducted. If any matters requiring disclosure, including any impact on business performance, are identified, we will promptly announce them.
| Item | Details |
|---|---|
| Event name | Manual Shutdown of the Reactor at Mihama Power Station Unit 3 |
| Date of occurrence | 8 May 2026 (alarm activated at 04:08, steam leak confirmed at around 04:10, and reactor manually shut down at 04:24) |
| Date recognized / date notice received | 8 May 2026 (alarm activated at 04:08 and steam leak confirmed at around 04:10) |
| Subject Entity | The Kansai Electric Power Company,Incorporated (Mihama Power Station Unit 3) |
| Target Locations / Products | Around the high-pressure turbine at Mihama Power Station Unit 3 (secondary system) |
| Impact on Earnings Forecast | If any matters requiring disclosure, including any impact on business performance, are identified, we will promptly announce them. |
| Suspended operations | Reactor operation at Mihama Power Station Unit 3 (manual shutdown of the reactor) |
| Outlook | An investigation into the cause will be conducted. If any matters requiring disclosure, including any impact on business performance, are identified, we will promptly announce them. |
| Planned follow-up disclosure | If any matters requiring disclosure, including any impact on business performance, are identified, we will promptly announce them. |
Items this document does not state (16)
These are items the company does not state in this document. We do not leave them blank, nor fill them in from other sources or by inference.
The reasons the company gives
The company's own explanation, not something inferred from the numbers.A steam leak from around the high-pressure turbine was confirmed using surveillance cameras. The root cause of the leak has not yet been identified.