ENS 42088
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ENS Event | |
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18:28 Oct 27, 2005 | |
Title | |
Event Description | As part of an ongoing Appendix R assessment, it has been determined that Operator actions credited in the Fire Hazards Analysis (FHA) potentially would not be met in fire zones credited for post fire safe shutdown per 10 CFR 50 Appendix R. Specifically, the FHA credited the availability of two in plant operators to conduct two separate series of operator actions that are required to be performed simultaneously within the first 20 minutes. However, the site Fire Plan requires one of these in plant operators to respond to a plant fire as a Fire Brigade member. Since no barrier was put in place to compensate for the lack of the credited operator; this event is reportable as an unanalyzed condition that significantly degraded plant safety.
The licensee notified the NRC Resident Inspector.
Further review has determined that adequate operator resources are and have been available to perform the required post fire safe shutdown actions. Therefore, this event is not an unanalyzed condition that significantly degrades plant safety and is being retracted. The licensee notified the NRC Resident Inspector. Notified R3DO (H. Peterson) |
Where | |
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Duane Arnold Iowa (NRC Region 3) | |
Reporting | |
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | |
Time - Person (Reporting Time:+-0.83 h-0.0346 days <br />-0.00494 weeks <br />-0.00114 months <br />) | |
Opened: | Edward Harrison 17:38 Oct 27, 2005 |
NRC Officer: | Bill Gott |
Last Updated: | Dec 19, 2005 |
42088 - NRC Website
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Unit 1 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (96 %) |
After | Power Operation (96 %) |
WEEKMONTHYEARENS 509432015-03-31T20:09:00031 March 2015 20:09:00
[Table view]10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Unanalyzed Condition Due to Degraded Torus Coating ENS 424792006-04-05T23:55:0005 April 2006 23:55:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Abnormal Operating Procedure (Aop) for Station Blackout Could Not Be Performed in Specified Time Period ENS 420882005-10-27T18:28:00027 October 2005 18:28:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Unanalyzed Condition ENS 417422005-06-02T23:49:0002 June 2005 23:49:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Appendix R Assessment on Remote Shutdown Panel 2015-03-31T20:09:00 | |
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