ENS 49404
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ENS Event | |
|---|---|
10:43 Oct 3, 2013 | |
| Title | Automatic Reactor Scram During Startup |
| Event Description | At 0643 EDT [on 10/03/13], during reactor startup, with the reactor critical and power in the intermediate range, an automatic reactor scram occurred due to an invalid (noise) intermediate range monitor (IRM) scram signal processed on both RPS trip systems. All control rods fully inserted and plant response was as expected. This notification is in accordance with 10CFR50.72(b)(2)(iv)(B). The reactor is currently subcritical.
When the reactor scram occurred, reactor power was below the Point of Adding Heat and had minimal effect on the plant. Normal offsite power is being maintained. Decay heat is being maintained via normal shutdown cooling. The Licensee has notified the NRC Resident Inspector. |
| Where | |
|---|---|
| Oyster Creek New Jersey (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(iv)(B), RPS Actuation | |
| Time - Person (Reporting Time:+-1.38 h-0.0575 days <br />-0.00821 weeks <br />-0.00189 months <br />) | |
| Opened: | Steve Johnston 09:20 Oct 3, 2013 |
| NRC Officer: | John Shoemaker |
| Last Updated: | Oct 3, 2013 |
| 49404 - NRC Website
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Oyster Creek with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation | |
WEEKMONTHYEARENS 528392017-07-03T14:15:0003 July 2017 14:15:00
[Table view]10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Scram on Low Condenser Vacuum ENS 523812016-11-20T08:42:00020 November 2016 08:42:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Scram During Main Turbine Testing ENS 518952016-04-30T22:04:00030 April 2016 22:04:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Scram During Reactor Startup Due to Increase in Unidentified Leak Rate ENS 510552015-05-07T21:27:0007 May 2015 21:27:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Scram Due to Turbine Trip ENS 509162015-03-22T18:14:00022 March 2015 18:14:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Reactor Scram Due to Aprm Hi Hi Signal ENS 505242014-10-12T06:51:00012 October 2014 06:51:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Scram Due to Decreasing Reactor Water Level ENS 502702014-07-11T07:14:00011 July 2014 07:14:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Scram Due to Loss of Main Condenser Vacuum ENS 496332013-12-14T08:37:00014 December 2013 08:37:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Scram Due to Rise in Reactor Pressure During Turbine Valve Testing ENS 494142013-10-06T15:30:0006 October 2013 15:30:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Scram Due to Degraded Condenser Vacuum ENS 494042013-10-03T10:43:0003 October 2013 10:43:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Scram During Startup ENS 481252012-07-23T07:29:00023 July 2012 07:29:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unusual Event Due to Loss of Offsite Power ENS 465072010-12-23T19:07:00023 December 2010 19:07:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Reactor Scram During Startup ENS 451962009-07-12T05:48:00012 July 2009 05:48:00 10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unusual Event Declared Due to a Loss of Offsite Power ENS 450212009-04-25T22:05:00025 April 2009 22:05:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Scram Following Loss of Cooling to Main Transformer ENS 448222009-02-02T02:56:0002 February 2009 02:56:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event and Reactor Scram Due to Main Transformer Fire ENS 446882008-11-29T02:01:00029 November 2008 02:01:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Scram Due to Main Transformer Fault ENS 438542007-12-19T16:45:00019 December 2007 16:45:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Scram Due to Lowering Reactor Level ENS 434952007-07-17T09:22:00017 July 2007 09:22:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Scram on Low Reactor Vessel Water Level (Rvwl) ENS 417412005-06-02T01:09:0002 June 2005 01:09:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Reactor Scram Due to Generator Trip/Turbine Trip Following Offsite Electical Transient ENS 407782004-05-27T04:33:00027 May 2004 04:33:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Scram While Performing Scheduled Shutdown ENS 400952003-08-22T06:59:00022 August 2003 06:59:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Turbine Trip Causes Automatic Reactor Scram at Oyster Creek 2017-07-03T14:15:00 | |
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