ENS Event | |
|---|---|
21:00 Feb 14, 2006 | |
| Title | Appendix "R" Related Unanalyzed Condition |
| Event Description | During an Appendix R analysis update effort, a circuit analysis issue was identified. This issue results in an unanalyzed condition, in that, a fire in fire area 13 could result in the loss of the ability to makeup to the PCS [primary coolant system]. The fire could cause the loss of all charging. It could also potentially start the only available HPSI pump with the suction path isolated. The suction valve closes as a result of the fire. The fire detection system in the area is operable.
The licensee noted that compensatory fire patrols of the area have already been instituted. The licensee is investigating both short term procedural changes and long term equipment modifications. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Palisades  Michigan (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | |
| Time - Person (Reporting Time:+1.63 h0.0679 days <br />0.0097 weeks <br />0.00223 months <br />) | |
| Opened: | Christer Dalgren 22:38 Feb 14, 2006 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Feb 14, 2006 |
| 42337 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 526472017-03-29T19:08:00029 March 2017 19:08:00
[Table view]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 Discovery of Non-Conforming Conditions During Tornado Hazards Analysis ENS 495162013-11-07T20:52:0007 November 2013 20:52:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Postulated Hot Short Fire Event That Could Adversely Impact Safe Shutdown Equipment ENS 473222011-09-26T10:02:00026 September 2011 10:02:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Unanalyzed Condition - Appendix R Equipment May Not Have Been Available ENS 463022010-10-01T17:25:0001 October 2010 17:25:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Unanalyzed Condition - Appendix R Non-Compliance Issue Identified ENS 429592006-11-02T19:36:0002 November 2006 19:36:00 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 High Pressure Safety Injection (Hpsi) Pumps Alignment Blocks Improperly Installed ENS 423372006-02-14T21:00:00014 February 2006 21:00:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Appendix "R" Related Unanalyzed Condition 2017-03-29T19:08:00 | |