ENS 47157
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. |
| 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 |
| 47157 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 489782013-02-28T20:36:00028 February 2013 20:36:00
[Table view]10 CFR 50.73(a)(1), Submit an LER Inadvertent Actuation of the Turbine Driven Auxiliary Feedwater Pump ENS 474752011-11-03T09:48:0003 November 2011 09:48:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of a Safety Injection Valve ENS 471572011-08-06T15:55:0006 August 2011 15:55:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Motor Driven Auxiliary Feedwater Pump ENS 422162005-12-07T05:00:0007 December 2005 05:00:00 10 CFR 50.73(a)(1), Submit an LER Invalid Specified System Actuation - "a" Auxiliary Feedwater 2013-02-28T20:36:00 | |