ENS 47157: Difference between revisions

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Latest revision as of 21:06, 1 March 2018

v t e ENS Event
15:55 Aug 6, 2011
Title	Invalid Actuation of Motor Driven Auxiliary Feedwater Pump
Event Description	This telephone notification is being made in lieu of submitting a written LER for an invalid actuation of the 1A Motor Driven Auxiliary Feedwater (MDAFW) pump under 10 CFR 50.73(a)(2)(iv)(A). On August 6, 2011 at 1055 CDT, during the performance of surveillance testing on the 1A Containment Spray (CS) pump, an unexpected automatic start of the 1A MDAFW pump occurred. While installing jumpers in the B1F sequencer to cause an automatic start for the 1A CS pump per the test procedure, the jumpers were inadvertently connected to the wrong relay which started the 1A MDAFW pump instead. This automatic start was considered invalid since the start signal was not initiated in response to actual plant conditions or parameters satisfying the requirements for initiation of the safety function of the system. The 1A MDAFW pump was restored to a normal standby alignment at 1131 CDT. The following required information is being submitted per NUREG-1022, Rev. 2. (a) The 1A MDAFW pump is an 'A' train component. (b) The 1A MDAFW pump automatic start is considered a complete train actuation. (c) Once the 1A MDAFW pump inadvertently started, the system functioned per design. The licensee has informed the NRC Resident Inspector.

ENS 47157 +/-
Where
Farley Alabama (NRC Region 2)
Reporting

10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation
Time - Person (Reporting Time:+235.92 h9.83 days <br />1.404 weeks <br />0.323 months <br />)
Opened:	Alton Deweese 11:50 Aug 16, 2011
NRC Officer:	Charles Teal
Last Updated:	Aug 16, 2011
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v • d • e

v t e Emergency Notification System
Farley with 10 CFR 50.73(a)(1), Submit an LER
WEEKMONTHYEAR2013-02-28T20:36:00 [Table view]
[ENS list for Farley]

@@ Line 16: / Line 16: @@
 | event date = 08/06/2011 10:55 CDT
 | last update date = 08/16/2011
-| title = Invalid Actuation Of Motor Driven Auxiliary Feedwater Pump
+| title = Invalid Actuation of Motor Driven Auxiliary Feedwater Pump
 | event text = This telephone notification is being made in lieu of submitting a written LER for an invalid actuation of the 1A Motor Driven Auxiliary Feedwater (MDAFW) pump under 10 CFR 50.73(a)(2)(iv)(A).
 On August 6, 2011 at 1055 CDT, during the performance of surveillance testing on the 1A Containment Spray (CS) pump, an unexpected automatic start of the 1A MDAFW pump occurred.  While installing jumpers in the B1F sequencer to cause an automatic start for the 1A CS pump per the test procedure, the jumpers were inadvertently connected to the wrong relay which started the 1A MDAFW pump instead.  This automatic start was considered invalid since the start signal was not initiated in response to actual plant conditions or parameters satisfying the requirements for initiation of the safety function of the system.  The 1A MDAFW pump was restored to a normal standby alignment at 1131 CDT.