ENS 49373
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ENS Event | |
|---|---|
14:17 Sep 20, 2013 | |
| Title | Safe Shutdown Analysis Reveals Noncompliance for a Fire Outside Diesel Room |
| Event Description | During the performance of a focused area self assessment (FASA) for the Clinton Power Station Fire Protection Program, the FASA team identified a noncompliance with the Safe Shutdown Analysis for a fire outside the Diesel Generator (DG) rooms (i.e., Fire Zone CB-1e, CB-1f, CB-2 and CB-4). The CO2 panels for each DG train are all located in the same area outside the DG engine bay rooms (i.e., 737' Control Building) and a fire in this area could cause fire damage to all three CO2 panels and/or wiring such that a trip (short) could be initiated to all three DG Ventilation (VD) fans. Loss of the VD fans (1VD01CA, B and C) results in loss of cooling in the DG rooms and ultimately loss of the diesels. This constitutes an Unanalyzed Condition that Significantly Affects Plant Safety.
Compensatory measures are in-place that will allow these VD trips to be overridden and the VD fans to be restarted from the Main Control Room. The NRC Resident Inspector has been notified. |
| Where | |
|---|---|
Clinton  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | |
| LER: | 05000461/LER-2013-005 |
| Time - Person (Reporting Time:+3.72 h0.155 days <br />0.0221 weeks <br />0.0051 months <br />) | |
| Opened: | Robert Rush 18:00 Sep 20, 2013 |
| NRC Officer: | Charles Teal |
| Last Updated: | Sep 20, 2013 |
| 49373 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (97 %) |
| After | Power Operation (97 %) |
WEEKMONTHYEARENS 531102017-12-09T19:48:0009 December 2017 19:48:00
[Table view]10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 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, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Manual Reactor Scram Due to Loss of Division 1 Ac Power to Numerous Components ENS 526012017-03-09T09:19:0009 March 2017 09:19:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Unanalyzed Condition Due to Relay Failure ENS 523772016-11-17T23:00:00017 November 2016 23:00:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Incorrect Method Used for Calculation of Control Room Habitability ENS 516692016-01-20T19:11:00020 January 2016 19:11:00 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 Primary-Secondary Containment Pressure Differential Exceeded Due to Ccp Exhaust Fan Trip ENS 493732013-09-20T14:17:00020 September 2013 14:17:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Safe Shutdown Analysis Reveals Noncompliance for a Fire Outside Diesel Room ENS 475102011-12-08T11:00:0008 December 2011 11:00:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Unanalyzed Condition - Non Fused Dc Bus Ammeters Could Short and Cause a Fire ENS 466032011-02-08T14:00:0008 February 2011 14:00:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Unanalyzed Event Could Initiate High Pressure Core Spray and Overfill the Reactor Pressure Vessel ENS 451222009-06-10T14:20:00010 June 2009 14:20:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Unanalyzed Condition - Unknown Cable with Combustible Coating Found in Division I / Division II Cable Tray 2017-03-09T09:19:00 | |
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