ENS Event | |
|---|---|
17:08 Jun 21, 2011 | |
| Title | 60-Day Optional Telephonic Notification Of Invalid Specified System Actuation |
| Event Description | Invalid Actuation of Turbine Driven Auxiliary Feedwater (TDAFW) pump.
This 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 6/21/11 at 1308 EDT, during maintenance activities for replacement of relay UVTXSB/1732, associated with 6.9kv Emergency Bus 1B-SB undervoltage trip circuitry, an automatic start of the Turbine Driven Auxiliary Feedwater (TDAFW) pump occurred while using a new procedure, CM-E0032. At the time of the event, all steam generator levels were normal. The TDAFW pump was secured by Operations on 6/21/11 at 1311 EDT. No actual condition existed that would require an automatic start of the TDAFW pump and therefore this event has been classified as an invalid actuation. The start of the TDAFW is considered a complete train actuation. The system started and functioned successfully. 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:+1412.58 h58.858 days <br />8.408 weeks <br />1.935 months <br />) | |
| Opened: | Tyler Halye 13:43 Aug 19, 2011 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Aug 19, 2011 |
| 47171 - 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 | |