ENS 45838
ENS Event | |
|---|---|
15:22 Feb 16, 2010 | |
| Title | Invalid Actuation of a Motor Driven Auxiliary Feedwater Pump |
| Event Description | This 60-day telephone notification is being made under reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) and 10 CFR 50.73(a)(1).
On 2/16/10 at 1122 EST, following maintenance activities on 'B' Emergency Safeguards Sequencer, Clearance Order 213623, was in the process of being lifted when an automatic start of 'B' Motor Driven Auxiliary Feedwater (MDAFW) pump occurred. Water flowed to all three Steam Generators resulting in an increase of reactor power by 0.1%. Isolation of Steam Generator Blowdown and Blowdown Sampling also occurred. The actuation occurred during work associated with replacement of relay 2-55/1163 which was installed incorrectly in the "B" Sequencer cabinet. At the time of the event, all Steam Generator levels were normal. No actual condition existed that would require an automatic start of the "B" MDAFW pump and therefore this event has been classified as an invalid actuation. All equipment operated properly. The 'B' MDAFW pump was secured by operations at 1123 EST. This invalid actuation was entered into the corrective action program as [Harris Nuclear Condition Report] NCR 381672. The safety significance of this event is considered to be minimal. The 'B' MDAFW pump started and operated normally and the 'A' MDAFW and Turbine Driven Auxiliary Feedwater (TDAFW) pumps were available. Immediate corrective actions were to secure the "B" MDAFW pump and restore Steam Generator Blowdown and Sampling. The licensee has notified the NRC Resident Inspector. |
| Where | |
|---|---|
Harris  North Carolina (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1369.45 h57.06 days <br />8.151 weeks <br />1.876 months <br />) | |
| Opened: | Phil Haverdink 15:49 Apr 14, 2010 |
| NRC Officer: | Dong Park |
| Last Updated: | Apr 14, 2010 |
| 45838 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 471712011-06-21T17:08:00021 June 2011 17:08:00
[Table view]10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification of Invalid Specified System Actuation ENS 464352010-11-10T05:24:00010 November 2010 05:24:00 10 CFR 50.73(a)(1), Submit an LER Telephone Notification in Lieu of Written Ler - Invalid Actuation of Motor Driven Auxiliary Feedwater Pump ENS 464672010-10-28T20:04:00028 October 2010 20:04:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of the "B" Emergency Service Water (Esw) Pump ENS 458382010-02-16T15:22:00016 February 2010 15:22:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of a Motor Driven Auxiliary Feedwater Pump 2011-06-21T17:08:00 | |