04:53 Nov 16, 2019
Temporary Loss of Control Room Envelope Boundary
At 2353 EST on November 15, 2019, a Main Control Room (MCR) alarm was received for low control room positive pressure.
At 2355 EST, a Control Room Envelope (CRE) door was found ajar and immediately closed. Technical Specification 3.7.10 Control Room Emergency Ventilation System (CREVS) was declared not met for both trains. Watts Bar Unit 1 and Unit 2 entered Condition B.
This condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D).
There was no impact on the health and safety of the public or plant personnel.
The NRC Resident Inspector has been notified.See similar EN #54390. The licensee has taken compensatory measures while investigating the cause.
|Watts Bar |
Tennessee (NRC Region 2)
|10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident|
|Time - Person (Reporting Time:+-1.85 h-0.0771 days <br />-0.011 weeks <br />-0.00253 months <br />)|
03:02 Nov 16, 2019
|NRC Officer:||Michael Bloodgood|
|Last Updated:||Nov 16, 2019|
|54391 - NRC Website|