ENS 41117
ENS Event | |
|---|---|
23:34 Oct 12, 2004 | |
| Title | Discovery of After-The-Fact Emergency Condition (Unusual Event) |
| Event Description | During a review of post trip activities associated with MANUAL REACTOR SCRAM DUE TO A STEAM LEAK IN THE TURBINE BUILDING (Event 41110) on 10/10/04, it was determined that Technical Specifications actions requirements were inappropriately applied. With both loops of RHR in suppression pool cooling (necessary with SRV's controlling reactor pressure), procedural guidance requires that the affected loop of RHR be declared inoperable when in a secondary mode of operation. With both loops of RHR thus inoperable, the applicable Technical Specification Action TS 3.6.2.3 Action b requires that the plant be in at least HOT SHUTDOWN within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the next 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
In accordance with the Technical Specification, this action was entered on 10/10/04 at 1831. The required time to cold shutdown was incorrectly noted as 0631 on 10/12/04. The required time was based on the combination of the 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> to hot shutdown and 24 to cold shutdown (or 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />). Because the plant was already in hot shutdown, the action should have been to place the plant in cold shutdown within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or by 1831 on 10/11/04. As a result of this error, planning activities and cooldown to cold shutdown condition was predicated on a target time of 0631 on 10/12/04 resulting in the plant exceeding the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> AOT. This constitutes a condition prohibited by Technical Specifications. The plant achieved cold shutdown on 10/12/04 at 0509 hours0.00589 days <br />0.141 hours <br />8.416005e-4 weeks <br />1.936745e-4 months <br />. In addition, Emergency Classification Guide (ECG) Initiating Condition 8.5 states that the inability to reach required operational condition within Technical Specification Limits and requires the declaration of an Unusual Event if the plant is not brought to the required Operational Condition within the Technical Specification required time limit. There are no safety consequences associated with this error. There were no issues associated with the transition to cold shutdown that would have constituted an emergency condition requiring initiation of the Emergency Plan. The missed LCO and subsequent classification was based on an erroneous TS Action time and, as such, exceeding the specification occurred as a result of scheduling not plant conditions. The licensee will inform the NRC resident inspector. |
| Where | |
|---|---|
Hope Creek  New Jersey (NRC Region 1) | |
| Reporting | |
| Other Unspec Reqmnt | |
| Time - Person (Reporting Time:+-3.82 h-0.159 days <br />-0.0227 weeks <br />-0.00523 months <br />) | |
| Opened: | Bo Beyl 19:45 Oct 12, 2004 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Oct 12, 2004 |
| 41117 - NRC Website
Loading map... {"minzoom":false,"maxzoom":false,"mappingservice":"leaflet","width":"350px","height":"250px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"zoom":6,"defzoom":14,"layers":["OpenStreetMap"],"image layers":[],"overlays":[],"resizable":false,"fullscreen":false,"scrollwheelzoom":true,"cluster":false,"clustermaxzoom":20,"clusterzoomonclick":true,"clustermaxradius":80,"clusterspiderfy":true,"geojson":"","clicktarget":"","imageLayers":[],"locations":[{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca class=\"mw-selflink selflink\"\u003EENS 41117\u003C/a\u003E - \u003Ca href=\"/Hope_Creek\" title=\"Hope Creek\"\u003EHope Creek\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EDiscovery of After-The-Fact Emergency Condition (Unusual Event)\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 41117 - Hope Creek\n","link":"","lat":39.46618888888889,"lon":-75.53605833333333,"icon":"/w/images/c/cc/PSEG_icon.png"}],"imageoverlays":null} | |
Unit 1 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Cold Shutdown (0 %) |
| After | Cold Shutdown (0 %) |
WEEKMONTHYEARENS 415302005-03-28T03:00:00028 March 2005 03:00:00
[Table view]Other Unspec Reqmnt Plant Shutdown to Repair Small Reactor Coolant System Leak ENS 411172004-10-12T23:34:00012 October 2004 23:34:00 Other Unspec Reqmnt Discovery of After-The-Fact Emergency Condition (Unusual Event) ENS 407102004-04-27T20:16:00027 April 2004 20:16:00 Other Unspec Reqmnt Procedural Acceptance Criteria for Diesel Driven Fire Pump Fuel Oil Viscosity Not Met 2005-03-28T03:00:00 | |