ENS 43428
ENS Event | |
|---|---|
02:23 Apr 17, 2007 | |
| Title | Invalid Esf Actuation During Refueling Outage |
| Event Description | This telephone notification is provided in accordance with 10 CFR 50.73(a)(1) to report an invalid Engineered Safeguards Feature (ESF) actuation of the Auxiliary Feedwater(AFW) system reportable under 10 CFR 50.73(a)(2)(iv)(A).
On April 16, 2007, at 2223 with Unit 1 in Mode 3, starting up from refueling outage 18, the 11 Steam Generator Feed Pump (SGFP) trip AFW Pump Auto Armed light extinguished unexpectedly and the Steam Generator (SG) sample valves 11 through 14-SS94 and SG Blowdown valves 11 through 14-GB4 closed. At the time, the 11 and 12 SGFPs were already tripped and the 11 and 12 Auxiliary Feedwater pumps were in service. No control room manipulations were in progress. A signal was generated to start the already in service AFW pumps. The invalid signal to start the AFW pumps was determined to be from a faulty SGFP alternate trip relay. The defective relay was replaced and the isolation signal was reset and retested satisfactorily. This event is reportable under 10 CFR 50.73(a)(2)(iv)(A) as an invalid ESF actuation and invalid system actuation. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Salem  New Jersey (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1498.45 h62.435 days <br />8.919 weeks <br />2.053 months <br />) | |
| Opened: | Gary Meekins 12:50 Jun 18, 2007 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Jun 18, 2007 |
| 43428 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Hot Standby (0 %) |
| After | Hot Standby (0 %) |
WEEKMONTHYEARENS 537862018-10-15T04:00:00015 October 2018 04:00:00
[Table view]10 CFR 50.73(a)(1), Submit an LER Invalid Auxiliary Feedwater Pump Actuation ENS 528052017-04-16T14:53:00016 April 2017 14:53:00 10 CFR 50.73(a)(1), Submit an LER Invalid Edg Actuation During Surveillance Testing ENS 520072016-04-18T01:04:00018 April 2016 01:04:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Emergency Diesel Generator ENS 516242015-10-29T16:12:00029 October 2015 16:12:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Unit 2 2C Safeguards Equipment Cabinet ENS 486672012-11-14T20:58:00014 November 2012 20:58:00 10 CFR 50.73(a)(1), Submit an LER 60 Day Telephone Notification of an Invalid Reactor Trip Actuation in Mode 4 ENS 438892007-10-13T15:13:00013 October 2007 15:13:00 10 CFR 50.73(a)(1), Submit an LER 60 Day Ler Report - 1C Edg Invalid Start ENS 434282007-04-17T02:23:00017 April 2007 02:23:00 10 CFR 50.73(a)(1), Submit an LER Invalid Esf Actuation During Refueling Outage ENS 408062004-04-12T19:43:00012 April 2004 19:43:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Notification of Invalid Actuation of Safety Injection Signal 2018-10-15T04:00:00 | |