ENS Event | |
|---|---|
20:00 Nov 26, 2013 | |
| Title | Leakage Discovered on Electromatic Relief Valve During Hydrostatic Testing |
| Event Description | On November 26, 2013, with Unit 2 shutdown for refueling, leakage was identified on the 2-0203-3C Electromatic Relief Valve (ERV) during a Reactor Pressure Vessel (RPV) pressure test. The leak is located on the line connecting the ERV main body to the pilot valve, and is approximately 1 drop per second. Each unit is designed with relief valves which actuate to control reactor coolant system pressure during transient conditions and are located on the main steam lines between the reactor vessel and the first isolation valve within the drywell. The cause of this event is under investigation.
The condition is being reported under 50.72(b)(3)(ii)(A) given the defect was associated with the primary coolant system pressure boundary. The NRC Resident Inspector has been notified. |
| Where | |
|---|---|
Dresden  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
| Time - Person (Reporting Time:+-0.97 h-0.0404 days <br />-0.00577 weeks <br />-0.00133 months <br />) | |
| Opened: | Kyle Koller 19:02 Nov 26, 2013 |
| NRC Officer: | Charles Teal |
| Last Updated: | Nov 26, 2013 |
| 49585 - NRC Website
Loading map... | |
Unit 2 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Cold Shutdown (0 %) |
| After | Cold Shutdown (0 %) |
WEEKMONTHYEARENS 530482017-11-01T17:25:0001 November 2017 17:25:00
[Table view]10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Unit 2 Failed Llrt Surveillance Test Due to Excessive Leakage ENS 495852013-11-26T20:00:00026 November 2013 20:00:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Leakage Discovered on Electromatic Relief Valve During Hydrostatic Testing ENS 495352013-11-14T09:00:00014 November 2013 09:00:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Primary Containment Isolation Valve Leak Test Failure ENS 454752009-11-03T11:09:0003 November 2009 11:09:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Degraded Condition Due to Weld Issue ENS 455612009-11-03T06:00:0003 November 2009 06:00:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Instrument Line Determined to Have Inadequate Structural Support 2017-11-01T17:25:00 | |