ENS 47352: Difference between revisions
Jump to navigation
Jump to search
StriderTol (talk | contribs) (Created page by program invented by Mark Hawes) |
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
||
| Line 16: | Line 16: | ||
| event date = 10/18/2011 15:45 CDT | | event date = 10/18/2011 15:45 CDT | ||
| last update date = 10/18/2011 | | last update date = 10/18/2011 | ||
| title = Aluminum Valve Discovered Installed | | title = Aluminum Valve Discovered Installed in Containment | ||
| event text = While Unit 1 was in Mode 5, for the 15th refueling outage, an issue was identified with the valve material of an existing installed airlock hydraulic system valve. The valve was determined to have an aluminum body which is not suitable for safety related use in containment. | | event text = While Unit 1 was in Mode 5, for the 15th refueling outage, an issue was identified with the valve material of an existing installed airlock hydraulic system valve. The valve was determined to have an aluminum body which is not suitable for safety related use in containment. | ||
The Unit 1 airlock hydraulic system penetrates the containment pressure boundary. The airlock hydraulic system achieves containment integrity by being a closed system under GDC-57. A loss of pressure boundary integrity would no longer meet General Design Criteria 57 (GDC-57) for a closed system. | The Unit 1 airlock hydraulic system penetrates the containment pressure boundary. The airlock hydraulic system achieves containment integrity by being a closed system under GDC-57. A loss of pressure boundary integrity would no longer meet General Design Criteria 57 (GDC-57) for a closed system. | ||
Latest revision as of 22:05, 1 March 2018
| Where | |
|---|---|
Comanche Peak  Texas (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | |
| LER: | 05000445/LER-2011-003 |
| Time - Person (Reporting Time:+-2.4 h-0.1 days <br />-0.0143 weeks <br />-0.00329 months <br />) | |
| Opened: | David Butler 18:21 Oct 18, 2011 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Oct 18, 2011 |
| 47352 - NRC Website
| |