ENS 53688
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ENS Event | |
|---|---|
04:00 Oct 22, 2018 | |
| Title | Inoperable Control Room Envelope Due to Failed Surveillance |
| Event Description | On October 22, 2018 at 2241 hrs. EDT, a loss of Control Room Envelope (CRE) was declared due to failing to meet the requirements of (surveillance requirement) SR 4.7.6.1h during 72-month surveillance testing. Measured in-leakage exceeded the SR acceptance value.
Abnormal Operating Procedure 2588A, 'Mitigating Actions for Control Room Envelope Boundary Breach', have been implemented. The licensee has notified Connecticut Department of Environmental Protection, Connecticut dispatch, Waterford dispatch, and the NRC Resident Inspector of this event. |
| Where | |
|---|---|
Millstone  Connecticut (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+24.28 h1.012 days <br />0.145 weeks <br />0.0333 months <br />) | |
| Opened: | John Magyarik 04:17 Oct 23, 2018 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Oct 23, 2018 |
| 53688 - NRC Website | |
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