ENS 53778

v t e ENS Event
05:00 Dec 5, 2018
Title	Three Minute Loss of Secondary Containment Vacuum
Event Description	At 1010 [EST] on December 5, 2018, Secondary Containment differential pressure exceeded the Technical Specification Surveillance Requirement of greater than or equal to 0.25 inches of vacuum water gauge. This condition existed for approximately 3 minutes before the differential pressure was restored to normal when the Standby Gas Treatment system was manually initiated. This event was caused by a trip of the service air compressor 39AC-2A. The loss of instrument air pressure caused Reactor Building ventilation to isolate and raise Secondary Containment differential pressure. The instrument air pressure was restored when 39AC-2A was isolated and the two backup air compressors started. This condition did not impact the leak tightness of Secondary Containment or the ability of the Standby Gas Treatment system to establish and maintain the required differential pressure. When Secondary Containment did not meet the Technical Specification Surveillance Requirement 3.6.4.1.1 for differential pressure, the Limiting Condition of Operation (LCO) was not met. Therefore, Secondary Containment was inoperable. This event is being reported under 10 CFR 50.72(b)(3)(v)(C). The licensee notified the NRC Resident Inspector.

ENS 53778 +/-
Where
Fitzpatrick New York (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Time - Person (Reporting Time:+12.1 h0.504 days <br />0.072 weeks <br />0.0166 months <br />)
Opened:	Mark Hawes 17:06 Dec 5, 2018
NRC Officer:	Mark Abramovitz
Last Updated:	Dec 5, 2018
53778 - NRC Website
v • d • e

v t e Emergency Notification System
FitzPatrick with 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
WEEKMONTHYEAR2019-01-16T05:00:00 [Table view]
[ENS list for FitzPatrick]

Navigation menu