ENS 57912: Difference between revisions
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| emergency class = Non Emergency | | emergency class = Non Emergency | ||
| notification date = 09/10/2025 05:23 | | notification date = 09/10/2025 05:23 | ||
| retracted = Yes | |||
| notification by = Josh Lindsey | | notification by = Josh Lindsey | ||
| NRC officer = Eric Simpson | | NRC officer = Eric Simpson | ||
| event date = 09/09/2025 22:50 EDT | | event date = 09/09/2025 22:50 EDT | ||
| last update date = 09/ | | last update date = 09/12/2025 | ||
| title = Enclosure Building Boundary Inoperable | | title = Enclosure Building Boundary Inoperable | ||
| event text = The following information was provided by the licensee via phone and fax: | | event text = The following information was provided by the licensee via phone and fax: | ||
| Line 23: | Line 24: | ||
The plant is currently in a 24-hour technical specification action statement (3.6.5.2) for Unit 2. Unit 3 is not impacted and continues to operate at 100 percent power. | The plant is currently in a 24-hour technical specification action statement (3.6.5.2) for Unit 2. Unit 3 is not impacted and continues to operate at 100 percent power. | ||
The Resident Inspector has been notified. | The Resident Inspector has been notified. | ||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2025/ | * * * RETRACTION ON SEPTEMBER 12, 2025, AT 0908 EDT FROM JARED FARLEY TO ERIC SIMPSON * * * | ||
The following information was provided by the licensee via phone and fax: | |||
Millstone Unit 2 is retracting NRC Event Notification (EN) 57912, made on September 10, 2025, at 0523 EDT, regarding a condition identified at Millstone Power Station Unit 2. The condition involved degraded sealant on manways to fire dampers HV-298A/B/G, which resulted in a direct path from the enclosure building to the atmosphere, challenging the integrity of the enclosure building boundary. This condition was initially reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(C) for an event or condition that could have prevented the fulfillment of a safety function (control of release of radioactive material). | |||
A subsequent review using additional information on hatch design and actual seating surface determined that there is reasonable assurance the enclosure building boundary remained operable and retained its safety function to control the release of radioactive material and mitigate the consequences of an accident. Based on this assessment, Unit 2 exited Technical Specification action statement 3.6.5.2, and the condition is not reportable under 10 CFR 50.72(b)(3)(v)(C). Therefore, NRC EN 57912 is being retracted. | |||
The Resident Inspector has been notified. | |||
Notified R1DO (Ford). | |||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2025/20250915en.html#en57912 | |||
}}{{unit info | }}{{unit info | ||
| Unit = 2 | | Unit = 2 | ||
Latest revision as of 22:03, 23 September 2025
| Where | |
|---|---|
Millstone  Connecticut (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
| Time - Person (Reporting Time:+2.55 h0.106 days <br />0.0152 weeks <br />0.00349 months <br />) | |
| Opened: | Josh Lindsey 05:23 Sep 10, 2025 |
| NRC Officer: | Eric Simpson |
| Last Updated: | Sep 12, 2025 |
| 57912 - NRC Website
| |
| Secondary Containment Inoperable [Table view] | ||