ENS 53883

v t e ENS Event
17:53 Feb 19, 2019
Title	Secondary Containment Inoperable
Event Description	On February 19, 2019, at 1307 EST, with the reactor at 100 percent Core Thermal Power and steady state conditions, plant personnel notified the Main Control Room that both doors in the Secondary Containment Airlock on the Reactor Building Fifth Floor were opened simultaneously for a period of approximately five minutes (i.e., from 1253 to 1258 EST). The failure of this interlock, which is intended to prevent both doors from being opened simultaneously, resulted in the Technical Specification (TS) Surveillance Requirement (SR) 3.6.4.1.3 not being met. The maximum Secondary Containment pressure observed during that time remained within TS limits. There were no radiological releases associated with this event. Declaring Secondary Containment inoperable as a result of not meeting TS SR 3.6.4.1.3 is reportable under 10 CFR 50.72(b)(3)(v)(C) as an event or condition that could have prevented the fulfillment of a safety function needed to control the release of radioactive material. The licensee has notified the NRC Resident Inspector. The repair to the failed interlock is in progress. As a compensatory measure signs are posted on the doors to notify personnel to not access the Reactor Building via those doors.

ENS 53883 +/-
Where
Fermi Michigan (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Time - Person (Reporting Time:+-2.57 h-0.107 days <br />-0.0153 weeks <br />-0.00352 months <br />)
Opened:	Jeff Myers 15:19 Feb 19, 2019
NRC Officer:	Joanna Bridge
Last Updated:	Feb 19, 2019
53883 - NRC Website
v • d • e

v t e Emergency Notification System
Fermi with 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
WEEKMONTHYEAR2021-10-14T17:20:00 [Table view]
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