ENS 57987: Difference between revisions
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| NRC officer = Brian P. Smith | | NRC officer = Brian P. Smith | ||
| event date = 10/14/2025 15:52 EDT | | event date = 10/14/2025 15:52 EDT | ||
| last update date = 10/ | | last update date = 10/25/2025 | ||
| title = Automatic Reactor Trip | | title = Automatic Reactor Trip | ||
| event text = The following information was provided by the licensee via phone and email: | | event text = The following information was provided by the licensee via phone and email: | ||
At 1552 EDT on October 14, 2025, with Unit 1 in mode 1 at 100 | At 1552 EDT on October 14, 2025, with Unit 1 in mode 1 at 100 percent power, the reactor automatically tripped due to a turbine trip. The trip was not complex with all systems responding normally post-trip. | ||
Operations responded and stabilized the plant. Decay heat is being removed by the emergency feedwater system. | Operations responded and stabilized the plant. Decay heat is being removed by the emergency feedwater system. | ||
Due to the reactor protection system actuation while critical, this event is being reported as a 4-hour, non-emergency notification per 10 CFR 50.72(b)(2)(iv)(B) and an 8-hour, non-emergency notification per 10 CFR 50.72(b)(3)(iv)(A) for valid actuation of the reactor protection and emergency feedwater systems. There was no impact on the health and safety of the public or plant personnel. The NRC resident inspector has been notified. | Due to the reactor protection system actuation while critical, this event is being reported as a 4-hour, non-emergency notification per 10 CFR 50.72(b)(2)(iv)(B) and an 8-hour, non-emergency notification per 10 CFR 50.72(b)(3)(iv)(A) for valid actuation of the reactor protection and emergency feedwater systems. There was no impact on the health and safety of the public or plant personnel. The NRC resident inspector has been notified. | ||
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance: | The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance: | ||
A generator field breaker lockout occurred. In addition, a small fire was observed in the generator field breaker and extinguished in less than 15 minutes by the onsite fire brigade. The unit is stable in hot standby with emergency feedwater and main condenser steam dumps in-service. | A generator field breaker lockout occurred. In addition, a small fire was observed in the generator field breaker and extinguished in less than 15 minutes by the onsite fire brigade. The unit is stable in hot standby with emergency feedwater and main condenser steam dumps in-service. | ||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2025/ | | URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2025/20251027en.html#en57987 | ||
}}{{unit info | }}{{unit info | ||
| Unit = 1 | | Unit = 1 | ||
Latest revision as of 06:20, 27 October 2025
| Where | |
|---|---|
Summer  South Carolina (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(iv)(B), RPS Actuation | |
| Time - Person (Reporting Time:+-2.08 h-0.0867 days <br />-0.0124 weeks <br />-0.00285 months <br />) | |
| Opened: | Lauren Anderson 17:47 Oct 14, 2025 |
| NRC Officer: | Brian P. Smith |
| Last Updated: | Oct 25, 2025 |
| 57987 - NRC Website
| |