ENS 52772: Difference between revisions

v t e ENS Event
01:27 Apr 3, 2017
Title	60-Day Optional Telephonic Notification Of Invalid Specified System Actuation
Event Description	This 60-day telephone notification is being made in accordance with the reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) and 10 CFR 50.73(a)(1) to describe an invalid actuation of a general containment isolation signal affecting multiple Main Steam Isolation Valves (MSIVs). On April 2, 2017 at approximately 2127 Eastern Daylight Time, during performance of a reactor vessel leak check, all four inboard MSIVs closed as a result of actuation of the Main Steam Line (MSL) high flow instrumentation. The high flow signal was spurious on two channels with no flow in the MSLs. Since an actual high flow condition did not exist at the time of the actuation, the actuation was considered invalid. The MSIVs functioned as designed on actuation of the MSL high flow instrumentation. All outboard MSIVs were closed at the time of the actuation. The NRC Resident Inspector has been notified.

ENS 52772 +/-
Where
Susquehanna Pennsylvania (NRC Region 1)
Reporting

10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation
Time - Person (Reporting Time:+1283.92 h53.497 days <br />7.642 weeks <br />1.759 months <br />)
Opened:	Steve Koch 13:22 May 26, 2017
NRC Officer:	Howie Crouch
Last Updated:	May 26, 2017
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v • d • e

v t e Emergency Notification System
Susquehanna with 10 CFR 50.73(a)(1), Submit an LER
WEEKMONTHYEAR2019-04-18T05:10:00 [Table view]
[ENS list for Susquehanna]

Revision as of 17:15, 24 September 2017