ENS 41005
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ENS Event | |
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17:45 Sep 1, 2004 | |
Title | Unanalyzed Condition Due to Appendix R Criteria Not Satisfied for Safe Shutdown Equipment |
Event Description | Unanalyzed condition due to missing fire barrier and inadequate separation involving power supply cables for RHR and Core Spray pumps. During a review of the site Appendix R program, NMC Engineering personnel discovered that the credited Monticello Division I RHR Pump and Core Spray Pump power cables pass through a Division II fire area. A fire in this room could potentially damage both divisions of post-fire safe shutdown equipment.
This condition is reportable under 10CFR50.72(b)(3)(ii)(B) as an unanalyzed condition that significantly degrades plant safety due to the lack of required separation of post-fire safe shutdown trains. As a compensatory action an hourly fire watch has been established in accordance with the Monticello Fire Protection Program. The licensee informed the NRC Resident Inspector. The licensee is continuing their evaluation to determine the extent of the condition. |
Where | |
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Monticello Minnesota (NRC Region 3) | |
Reporting | |
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | |
Time - Person (Reporting Time:+-0.55 h-0.0229 days <br />-0.00327 weeks <br />-7.5339e-4 months <br />) | |
Opened: | Robert Schreifels 17:12 Sep 1, 2004 |
NRC Officer: | Steve Sandin |
Last Updated: | Sep 1, 2004 |
41005 - NRC Website
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Unit 1 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
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