ENS 47496
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ENS Event | |
|---|---|
17:35 Dec 3, 2011 | |
| Title | Secondary Containment Inoperable Due to a Degraded Door Seal |
| Event Description | On December 3, 2011 during operator rounds, it was discovered that an Enclosure Building (secondary containment) door sweep had failed and was not providing an adequate seal.
Technical Specification (TS) 3.6.5.2, 'Secondary Containment Enclosure Building', is applicable in Modes 1,2,3, and 4 was entered at 1235 [EST]. Since secondary containment was rendered inoperable, Dominion is reporting this as a condition that could have prevented the fulfillment of the safety function to control the release of radioactive material. The door has subsequently been repaired, the Enclosure Building declared OPERABLE and the TS Action Statement exited at 1524 [EST]. Further engineering review will be conducted to more fully evaluate the impact on radiological controls. This condition is being reported pursuant to 10 CFR 50.72(b)(3)(v)(C). The licensee has notified the Connecticut Department of Environmental Protection, surrounding towns and the NRC Resident Inspector. |
| 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:+-0.7 h-0.0292 days <br />-0.00417 weeks <br />-9.5886e-4 months <br />) | |
| Opened: | Jason Bookmiller 16:53 Dec 3, 2011 |
| NRC Officer: | Vince Klco |
| Last Updated: | Dec 3, 2011 |
| 47496 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
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