ENS 41487
ENS Event | |
|---|---|
00:30 Mar 13, 2005 | |
| Title | Pinhole Leak in Instrument Drain Line Off Main Steam System |
| Event Description | The following was provided by the licensee:
This report is being made pursuant to 10CFR50.72(b)(3)(ii)(A). At 1830 on March 12, 2005, during the U-2 vessel pressure test, a leak was identified on the 2B21-F028D. The drain piping weld had pinhole leaks at the weld with a leak rate of 60 drops per minute. Due to welding or material defects in ASME Class 1 components, Technical Requirement Manual 3.4.a., condition A was entered. The component was isolated and corrective actions are in progress to repair the leakage. Repairs will be completed and tested prior to startup. The valve 2B21-F028D is located in the Main Steam system downstream of the outboard main steam isolation valve. The leaking weld is the connecting weld of the valve body to the drain line. There was no prior history of repair on the valve or weld from the last outage. The licensee stated no indication was present to indicate the valve was leaking steam during normal operation. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
LaSalle  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
| Time - Person (Reporting Time:+-0.2 h-0.00833 days <br />-0.00119 weeks <br />-2.7396e-4 months <br />) | |
| Opened: | Mike Fitzpatrick 00:18 Mar 13, 2005 |
| NRC Officer: | John Knoke |
| Last Updated: | Mar 13, 2005 |
| 41487 - 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 41487\u003C/a\u003E - \u003Ca href=\"/LaSalle\" title=\"LaSalle\"\u003ELaSalle\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EPinhole Leak in Instrument Drain Line Off Main Steam System\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 41487 - LaSalle\n","link":"","lat":41.24573888888889,"lon":-88.66919444444444,"icon":"/w/images/b/be/Constellation_icon.png"}],"imageoverlays":null} | |
Unit 2 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Cold Shutdown (0 %) |
| After | Cold Shutdown (0 %) |
WEEKMONTHYEARENS 532762018-03-22T08:00:00022 March 2018 08:00:00
[Table view]10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Technical Specification Required Shutdown Due to Pressure Boundary Leakage ENS 513002015-08-07T18:40:0007 August 2015 18:40:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Degraded Condition Due to Pressure Boundary Leakage on Vent Line Welded Joint ENS 489772013-04-28T02:24:00028 April 2013 02:24:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Technical Specification Required Plant Shutdown ENS 489432013-04-18T19:00:00018 April 2013 19:00:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Pin Holes Leaks Identified in High Pressure Core Spray System ENS 466052011-02-10T00:04:00010 February 2011 00:04:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Pressure Boundary Leakage ENS 414872005-03-13T00:30:00013 March 2005 00:30:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Pinhole Leak in Instrument Drain Line Off Main Steam System 2018-03-22T08:00:00 | |