ENS 51889

v t e ENS Event
00:07 Apr 28, 2016
Title	High Energy Line Break Door Discovered Open
Event Description	On April 27, 2016 at 20:07 [EDT], a high energy line break (HELB) door between the turbine driven auxiliary feedwater pump and the motor driven auxiliary feedwater pump rooms was discovered open and unattended. In the event of a HELB, this condition could have rendered both trains of auxiliary feedwater inoperable. The boundary was not operable for approximately 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. Upon discovery, the door was closed restoring the boundary. This event is being reported pursuant to 10 CFR 50.72(b)(3)(v) as any event or condition that alone could have prevented the fulfillment of the safety function of structures or systems that are needed to: (B) Remove residual heat; and (D) Mitigate the consequences of an accident. The NRC Senior Resident Inspector has been notified. The Licensee notified the Connecticut DEEP and Waterford Dispatch.

ENS 51889 +/-
Where
Millstone Connecticut (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Time - Person (Reporting Time:+0.13 h0.00542 days <br />7.738095e-4 weeks <br />1.78074e-4 months <br />)
Opened:	Michael Gagnon 00:15 Apr 28, 2016
NRC Officer:	Jeff Herrera
Last Updated:	Apr 28, 2016
51889 - NRC Website
v • d • e

v t e Emergency Notification System
Millstone with 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR		2023-07-25T13:24:00 [Table view]
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