ENS 42528
ENS Event | |
|---|---|
22:00 Apr 26, 2006 | |
| Title | Plant S/D Required by Ts Due to Leak in Service Water Supply Line to "B" Edg |
| Event Description | At 1345 on April 26, 2006, a decision to shutdown the plant was made due to an Inoperable service water train. At 1700 on April 26, 2006, the plant shutdown was initiated.
On April 25, 2006, a leak was found on the Service Water supply line to the 'B' emergency diesel generator. At 1725 on April 25, 2006, the 'B' train of service water was declared inoperable and the technical specification limiting condition for operation was entered for one train of service water being inoperable. The end state for exceeding the allowed outage time for the limiting condition for operation for service water is the reactor coolant system Tavg less than 350 degrees Fahrenheit. During investigation of the leak, an additional small leak was discovered approximately 180 degrees from the first leak on the same section of pipe. Based on this additional leak, a conservative decision was made to shutdown the unit. It is estimated that the repair to the service water piping would not be completed within the allowed outage time and therefore per 10CFFR50.72(b)(2)(i) this event is reportable as the initiation of any nuclear plant shutdown required by plant's technical specifications. All systems are currently functioning as required for the unit shutdown and the "B" EDG is operable and available. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Kewaunee  Wisconsin (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-3.62 h-0.151 days <br />-0.0215 weeks <br />-0.00496 months <br />) | |
| Opened: | Jerry Riste 18:23 Apr 26, 2006 |
| NRC Officer: | Arlon Costa |
| Last Updated: | Apr 26, 2006 |
| 42528 - 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 42528\u003C/a\u003E - \u003Ca href=\"/Kewaunee\" title=\"Kewaunee\"\u003EKewaunee\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EPlant S/D Required by Ts Due to Leak in Service Water Supply Line to \"B\" Edg\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 42528 - Kewaunee\n","link":"","lat":44.342975,"lon":-87.53713055555555,"icon":"/w/images/b/b0/Dominion_icon.png"}],"imageoverlays":null} | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (92 %) |