ENS 49034
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ENS Event | |
|---|---|
08:00 May 15, 2013 | |
| Title | Leaking Containment Air Lock Equalizing Valve |
| Event Description | On May 15, 2013, at 0400 EDT, it was discovered that an equalizing valve for the outer containment air lock was leaking by its seat rendering the outer containment air lock inoperable. This condition was discovered by maintenance personnel as they were exiting containment through the inner containment air lock.
The containment inner door was open for transit, which resulted in the Loss of Containment Integrity. With both containment air lock doors open at the time of discovery of the leaking equalizing valve, this condition is reportable pursuant to 10 CFR 50.72(b)(3)(v). The inner air lock door was immediately closed and has remained closed since. Technical Specification 3.6.1.1 Primary Containment Integrity is applicable in Modes 1,2,3, and 4. Since Primary Containment Integrity was rendered inoperable, Dominion is reporting that this condition could have prevented the fulfillment of the safety function to control the release of radioactive material. The NRC Senior Resident Inspector has been notified. |
| 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:+3.92 h0.163 days <br />0.0233 weeks <br />0.00537 months <br />) | |
| Opened: | Gerald Baker 11:55 May 15, 2013 |
| NRC Officer: | Pete Snyder |
| Last Updated: | May 15, 2013 |
| 49034 - NRC Website
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Unit 3 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Hot Shutdown (0 %) |
| After | Hot Standby (0 %) |
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