ENS 46607
ENS Event | |
|---|---|
13:45 Feb 11, 2011 | |
| Title | Tears Discovered in Flexible Pipe Seals |
| Event Description | On February 11, 2011, during a plant walk down, it was discovered that two flexible boots sealing two piping penetrations in the secondary containment boundary had a total of three small tears rendering them inoperable.
Technical Specification 3.6.6.2, 'Secondary Containment,' is applicable in Modes 1, 2, 3, and 4 and was entered. Since Secondary Containment was rendered inoperable, Dominion is reporting that this condition could have prevented the fulfillment of the safety function to control the release of radioactive material. Further engineering review will be conducted to more fully evaluate the impact on radiological controls. No actual release occurred as a result of this condition. The licensee notified the NRC Resident Inspector, the State of Connecticut and the Town of Waterford.
On February 11, 2011, small tears were discovered on flexible boots sealing two piping penetrations in the secondary containment boundary on Millstone Power Station Unit 3. Operators made a report in accordance with 10CFR50.72(b)(3)(v)(C). Subsequently, an engineering evaluation has been completed that concludes that the discovered tears would not have prevented the fulfillment of the safety function of the secondary containment boundary. Therefore, the condition reported in event report 46607 is being retracted. The NRC Senior Resident Inspector has been notified. Notified R1DO (Rogge). |
| Where | |
|---|---|
Millstone  Connecticut (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
| Time - Person (Reporting Time:+-1.17 h-0.0488 days <br />-0.00696 weeks <br />-0.0016 months <br />) | |
| Opened: | Todd Fisher 12:35 Feb 11, 2011 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Mar 21, 2011 |
| 46607 - NRC Website | |
Unit 3 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |