ENS 50212

v t e ENS Event
13:30 Apr 22, 2014
Title	Emergency Diesel Generator Invalid Actuation
Event Description	This report describes an invalid actuation of the Unit 2, Train A (2-01) Emergency Diesel Generator (EDG) that occurred on April 22, 2014. This report is being made in accordance with 10CFR50.73(a)(2)(iv)(A). 10CFR50.73(a)(1) states, in part, 'In the case of an invalid actuation reported under 10CFR50.73(a)(2)(iv), other than actuation of the Reactor Protection System (RPS) when the reactor is critical, the licensee may, at its option, provide a telephone notification to the NRC Operations Center within 60 days after discovery of the event instead of submitting a written LER.' On April 22, 2014, Comanche Peak Nuclear Power Plant Unit 2 was in Mode 5 during the 14th refueling outage. At approximately 0830 CDT, while performing a lockout test on EDG 2-01, the Reactor Operator made a place keeping error that resulted in EDG 2-01 starting and rolling up to approximately 300 RPM. The start signal should have been blocked as part of the test. However, a step was skipped due to a place keeping error and this resulted in an inadvertent start of EDG 2-01 during the performance of a subsequent step. The specific train and system that actuated was the Unit 2, Train A, Emergency Diesel Generator. During the inadvertent EDG start the system started and functioned correctly, and the EDG only reached 300 RPM before it was shut down. The licensee has notified the NRC Resident Inspector.

ENS 50212 +/-
Where
Comanche Peak Texas (NRC Region 4)
Reporting

10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation
Time - Person (Reporting Time:+1393.82 h58.076 days <br />8.297 weeks <br />1.909 months <br />)
Opened:	Raul Martinez 15:19 Jun 19, 2014
NRC Officer:	Dong Park
Last Updated:	Jun 19, 2014
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v • d • e

v t e Emergency Notification System
Comanche Peak with 10 CFR 50.73(a)(1), Submit an LER
WEEKMONTHYEAR2019-11-01T00:19:00 [Table view]
[ENS list for Comanche Peak]

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