ENS 49828
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ENS Event | |
|---|---|
08:25 Feb 14, 2014 | |
| Title | Shield Building Construction Opening |
| Event Description | On 02/14/2014, an unfilled area was discovered in the concrete along the top of the shield building construction opening on the annulus side. The condition was discovered during the current steam generator replacement outage, and is likely due to not completely repouring the shield building wall opening in 2011. Analysis shows this condition is bounded by previous calculations that demonstrate the containment function is maintained such that the protection of the health and safety of the public was not in question. Further analysis is planned to reconfirm previous calculations.
The NRC Resident Inspector has been notified.
The FirstEnergy Nuclear Operating Company is retracting the 8-hour non-emergency notification made on 02/14/2014 (EN 49828). Engineering evaluation of the unfilled concrete area along the top of the shield building construction opening determined the condition did not prevent the shield building from performing all design functions as described in the Updated Safety Analysis Report. Therefore, this issue did not represent a condition that significantly degraded plant safety, and the notification made per 10CFR 50.72(b)(3)(ii)(B) is being retracted. The NRC Resident Inspector has been briefed on the evaluation results and informed of this retraction. Notified the R3DO (Kunowski). |
| Where | |
|---|---|
Davis Besse  Ohio (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | |
| Time - Person (Reporting Time:+2.82 h0.118 days <br />0.0168 weeks <br />0.00386 months <br />) | |
| Opened: | Nick Buehler 11:14 Feb 14, 2014 |
| NRC Officer: | Daniel Mills |
| Last Updated: | Feb 24, 2014 |
| 49828 - NRC Website
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WEEKMONTHYEARENS 573732024-10-10T14:45:00010 October 2024 14:45:00
[Table view]10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Unanalyzed Condition ENS 553212021-06-22T16:08:00022 June 2021 16:08:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition High-Energy Line Break Door Unable to Be Latched ENS 528652017-07-20T16:30:00020 July 2017 16:30:00 10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Potential Tornado Missile Vulnerabilities ENS 520102016-06-16T15:37:00016 June 2016 15:37:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Unanalyzed Condition of Emergency Diesel Generator During Tornado Low Pressure ENS 506392014-11-25T17:00:00025 November 2014 17:00:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Non-Conservatisms in Methodology Used for Emergency Core Cooling System Performance Requirements ENS 498282014-02-14T08:25:00014 February 2014 08:25:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Shield Building Construction Opening ENS 470962011-07-26T20:00:00026 July 2011 20:00:00 10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 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)(B), Unanalyzed Condition Unanalyzed Conditions Involving the Safety Related Direct Current (Dc) System ENS 416982005-05-13T20:00:00013 May 2005 20:00:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Unanalyzed Condition - Electrical Containment Penetration ENS 404572004-01-19T16:20:00019 January 2004 16:20:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Certain Plant Doors May Not Be Able to Withstand Pressure Created by Main Steam Line Break ENS 402562003-10-17T13:00:00017 October 2003 13:00:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Steam and Feedwater Rupture Control System Unanalyzed Condition at Davis Besse 2024-10-10T14:45:00 | |
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