ENS 50712
ENS Event | |
|---|---|
23:25 Jan 1, 2015 | |
| Title | Main Control Room Boundary Door Did Not Properly Latch |
| Event Description | During [surveillance] checks of Control Room doors, a boundary door did not latch after being accessed until the door was opened and closed. This is being
reported as it could have prevented the fulfillment of a safety function to mitigate the consequences of an accident per 10CFR50.72(b)(3)(v)(D). The door is currently closed and latched. The door was in this condition for between 5 and 10 seconds. The licensee notified the Connecticut Department of Environmental Protection, Town of Waterford and the NRC Resident Inspector.
Upon further review, Millstone Power Station Unit 2 has concluded that there was no loss of safety function, because even with the control room door latch degraded, the control room door and its closing mechanism would still be able to maintain the control room envelope's boundary intact. Therefore, this condition is not reportable and NRC Event Number 50712 is being retracted. The basis for this conclusion will be provided to the NRC Resident Inspector. The licensee notified the NRC Resident Inspector. Notified R1DO (Jackson). |
| 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:+-1.38 h-0.0575 days <br />-0.00821 weeks <br />-0.00189 months <br />) | |
| Opened: | Walter Orf 22:02 Jan 1, 2015 |
| NRC Officer: | Vince Klco |
| Last Updated: | Jan 8, 2015 |
| 50712 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |