ENS 52501
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ENS Event | |
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13:35 Jan 20, 2017 | |
Title | Failure of a Secondary Containment Door to Close |
Event Description | At 0835 [EST] on January 20, 2017, at Millstone Power Station Unit 3, subsequent to personnel passage through a door in the auxiliary building, the door failed rendering it unable to completely close. At this time, in accordance with Technical Specification 3.6.6.2 "Secondary Containment," the Shift Manager declared the secondary containment inoperable. The door was repaired and the door completely closed at 1256 [EST] on January 20, 2017, and secondary containment was declared operable.
Since Secondary Containment 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 and mitigate the consequences of an accident. This condition is being reported pursuant to 10 CFR 50.72(b)(3)(v)(C) and 10 CFR 50.72(b)(3)(v)(D). The NRC Senior Resident Inspector has been notified. |
Where | |
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Millstone ![]() Connecticut (NRC Region 1) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
Time - Person (Reporting Time:+2.45 h0.102 days <br />0.0146 weeks <br />0.00336 months <br />) | |
Opened: | Walter Orf 16:02 Jan 20, 2017 |
NRC Officer: | Steven Vitto |
Last Updated: | Jan 20, 2017 |
52501 - NRC Website
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Unit 3 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
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