ENS Event | |
|---|---|
13:30 Apr 22, 2014 | |
| Title | |
| Event Description | This report describes an invalid actuation of the Unit 2, Train A (2-01) Emergency Diesel Generator (EDG) that occurred on April 22, 2014. This report is being made in accordance with 10CFR50.73(a)(2)(iv)(A). 10CFR50.73(a)(1) states, in part, 'In the case of an invalid actuation reported under 10CFR50.73(a)(2)(iv), other than actuation of the Reactor Protection System (RPS) when the reactor is critical, the licensee may, at its option, provide a telephone notification to the NRC Operations Center within 60 days after discovery of the event instead of submitting a written LER.'
On April 22, 2014, Comanche Peak Nuclear Power Plant Unit 2 was in Mode 5 during the 14th refueling outage. At approximately 0830 CDT, while performing a lockout test on EDG 2-01, the Reactor Operator made a place keeping error that resulted in EDG 2-01 starting and rolling up to approximately 300 RPM. The start signal should have been blocked as part of the test. However, a step was skipped due to a place keeping error and this resulted in an inadvertent start of EDG 2-01 during the performance of a subsequent step. The specific train and system that actuated was the Unit 2, Train A, Emergency Diesel Generator. During the inadvertent EDG start the system started and functioned correctly, and the EDG only reached 300 RPM before it was shut down. The licensee has notified the NRC Resident Inspector. |
| Where | |
|---|---|
Comanche Peak  Texas (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1393.82 h58.076 days <br />8.297 weeks <br />1.909 months <br />) | |
| Opened: | Raul Martinez 15:19 Jun 19, 2014 |
| NRC Officer: | Dong Park |
| Last Updated: | Jun 19, 2014 |
| 50212 - NRC Website
Loading map... | |
Unit 2 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Cold Shutdown (0 %) |
| After | Cold Shutdown (0 %) |
WEEKMONTHYEARENS 544312019-11-01T00:19:0001 November 2019 00:19:00
[Table view]10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of the Unit 2 Turbine Driven Auxiliary Feedwater Pump (Tdafwp) ENS 505622014-09-12T18:42:00012 September 2014 18:42:00 10 CFR 50.73(a)(1), Submit an LER Invalid Specified System Actuation ENS 502122014-04-22T13:30:00022 April 2014 13:30:00 10 CFR 50.73(a)(1), Submit an LER Emergency Diesel Generator Invalid Actuation ENS 484632012-10-31T11:15:00031 October 2012 11:15:00 10 CFR 50.73(a)(1), Submit an LER Sequencer Fault Resulting in System Actuations ENS 444392008-06-29T00:04:00029 June 2008 00:04:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Report for an Invalid Actuation of Unit 1 Tdafw Pump ENS 433542007-03-13T01:27:00013 March 2007 01:27:00 10 CFR 50.73(a)(1), Submit an LER Invalid Tubine Driven Auxiliary Feedwater Pump Starts 2019-11-01T00:19:00 | |