ENS 49276
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ENS Event | |
|---|---|
15:02 Aug 13, 2013 | |
| Title | Both Control Room Ventilation Filtration Trains Declared Inoperable |
| Event Description | At approximately 1102 [EDT], August 13, 2013, both control room ventilation filtration trains were declared inoperable in accordance with Technical Specification 3.7.10, Condition B, due to a control room boundary door not being fully closed. The door was unable to be closed for approximately nine minutes due to an apparent mis-operation of the door operating mechanism. The door's locking bolts fully extended causing interference between the door and door frame. The door was restored to operable status at approximately 1111 [EDT], August 13, 2013.
Technical Specification 3.7.10 allows control room boundary doors to be opened intermittently, under administrative control for preplanned activities, provided the doors can be rapidly restored to the design condition. Previous evaluations of the door not being fully closed for a limited time concluded no loss of safety function had existed. This condition had no impact on the health and safety of the public. The NRC Resident Inspector has been notified. |
| Where | |
|---|---|
| Palisades Michigan (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+1.15 h0.0479 days <br />0.00685 weeks <br />0.00158 months <br />) | |
| Opened: | Terry Davis 16:11 Aug 13, 2013 |
| NRC Officer: | John Shoemaker |
| Last Updated: | Aug 13, 2013 |
| 49276 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
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