ENS 43488
ENS Event | |
|---|---|
21:30 Jul 12, 2007 | |
| Title | Unallowable Manual Actions Credited for Fire Safe Shutdown |
| Event Description | During performance of NFPA-805, Transition Project Task SUP-1, 'Manual Action Compliance,' it was determined manual operator actions are being credited in IX/12-A Lower 4KV Room and XII/14-A Upper 4KV Room to achieve and maintain hot safe shutdown. The manual actions are to provide temporary ventilation capability to the 4KV rooms to assume continued operability of vital switchgear. The switchgear provides power to equipment needed to achieve and maintain hot shutdown. These manual actions were specified in an Appendix R Section III.G.1/G.2 fire area; however, they do not meet the criteria for allowable manual actions specified in RIS 2006-10, 'Regulatory Expectations with Appendix R paragraph III.G.2 Operator Manual Actions.' No system actuations occurred as part of this event.
The discovery of these manual actions is being reported as an unanalyzed condition as defined by 10 CFR 50.72(b)(3)(ii)(B) and has been entered into the site's corrective action program The alternate compensatory measure for these areas is to perform the specified manual actions. An extent of condition review will be initiated that will encompass the remainder of the safe shutdown areas. The results of the extent of condition will be documented in the site's corrective action program with compensatory measures being established as appropriate. The 60 day licensee event report, submitted to the Commission in accordance with 10 CFR 50.73(a)(2)(ii), will provide the results of the manual action compliance review and follow-up corrective actions. This is based on preliminary data and further investigation is ongoing. The licensee will notify the NRC Resident Inspector. |
| Where | |
|---|---|
Monticello  Minnesota (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | |
| Time - Person (Reporting Time:+-2.27 h-0.0946 days <br />-0.0135 weeks <br />-0.00311 months <br />) | |
| Opened: | Mark Kruse 19:14 Jul 12, 2007 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Jul 12, 2007 |
| 43488 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |