ENS 45416
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ENS Event | |
|---|---|
23:30 Oct 7, 2009 | |
| Title | Discovery of a Containment Separation |
| Event Description | Crystal River Unit 3 is currently shutdown for a planned refueling and steam generator replacement outage. During containment building concrete removal activities to create a construction opening to support steam generator replacement, a separation in the concrete was discovered in the vicinity of the construction opening near the periphery of the containment. The Crystal River Unit 3 containment is a steel lined, post tensioned concrete structure nominally 42 inches thick. Post tensioning is achieved utilizing an outer array of horizontal tendons immediately adjacent to an inner array of vertical tendons. The separation is generally in the plane of the horizontal tendons. Inside the separation is 30 inches of concrete and the steel liner plate. This condition has been evaluated relative to current plant conditions and found to represent no degradation in safety. Crystal River Unit 3 personnel in conjunction with industry experts are currently performing a detailed analysis of this separation to determine the cause, extent of condition, the impact on the containment building function and any required repairs prior to plant restart. Operating experience reports are being prepared to share our information with the industry. The station will provide updates as we gain more information concerning this issue.
The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Crystal River  Florida (NRC Region 2) | |
| Reporting | |
| Other Unspec Reqmnt | |
| Time - Person (Reporting Time:+-3.95 h-0.165 days <br />-0.0235 weeks <br />-0.00541 months <br />) | |
| Opened: | William Krehely 19:33 Oct 7, 2009 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Oct 7, 2009 |
| 45416 - NRC Website
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WEEKMONTHYEARENS 529572017-09-09T15:09:0009 September 2017 15:09:00
[Table view]Other Unspec Reqmnt Hurricane Warning Issued Affecting Site within 36 Hours ENS 467222011-04-04T04:00:0004 April 2011 04:00:00 Other Unspec Reqmnt Press Release Concerning Additional Containment Delamination ENS 466732011-03-14T18:11:00014 March 2011 18:11:00 Other Unspec Reqmnt Additional Delaminated Containment Concrete Discovered ENS 454162009-10-07T23:30:0007 October 2009 23:30:00 Other Unspec Reqmnt Discovery of a Containment Separation ENS 437062007-10-10T17:12:00010 October 2007 17:12:00 Information Only, Other Unspec Reqmnt, 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Pressurizer Porv Opened Momentarily with Rcs Discharge of Approximately 10 Gallons 2017-09-09T15:09:00 | |
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