ENS 48936

v t e ENS Event
01:42 Apr 17, 2013
Title	Specified System Actuation During Turbine Stop Valve Logic Testing While Shutdown
Event Description	During outage main turbine stop valve RPS logic surveillance testing, an invalid RPS actuation occurred due to an error in executing main turbine surveillance testing procedures. A Turbine Stop Valve closure RPS signal occurred due to an error in the restoration sequence of restoring the RPS bypass signal and a subsequent manual trip of the main turbine. This resulted in a full scram and a trip of both reactor recirculation pumps. The site post-scram response procedure was entered, which required that the mode switch be placed in the locked SHUTDOWN position. This caused an expected but valid RPS actuation. No control rod motion occurred due to all control rods were inserted at the time of the invalid RPS actuation and subsequent valid RPS actuation. The license has notified the NRC Resident Inspector.

ENS 48936 +/-
Where
Limerick Pennsylvania (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(iv)(A), System Actuation
LER:	05000353/LER-2013-001
Time - Person (Reporting Time:+0.48 h0.02 days <br />0.00286 weeks <br />6.57504e-4 months <br />)
Opened:	Chris Giambrone 02:11 Apr 17, 2013
NRC Officer:	Bill Huffman
Last Updated:	Apr 17, 2013
48936 - NRC Website
v • d • e

v t e Emergency Notification System
Limerick with 10 CFR 50.72(b)(3)(iv)(A), System Actuation
WEEKMONTHYEAR2015-06-21T20:25:00 [Table view]
[ENS list for Limerick]

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