ENS 44099
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ENS Event | |
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14:45 Mar 26, 2008 | |
Title | Control Room Pressure Boundary Door Blocked Open |
Event Description | At 1045 EDT, it was recognized that Auxiliary Building Door R5-6 is a Control Center Pressure Boundary door. The door was blocked open at approximately 1400 on 3/24/2008 to support draining for on going maintenance on Division 1 CCHVAC Chiller. Upon recognizing this condition, Tech Spec 3.7.3 Action B.1 was entered for an inoperable Control Center Pressure Boundary at 1045 EDT [03/26/2008], with a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> action to restore the boundary to operable status. Actions were taken to close Door R5-6 at 1120 hours0.013 days <br />0.311 hours <br />0.00185 weeks <br />4.2616e-4 months <br /> [03/26/2008], and Tech Spec 3.7.3 Action B.1 was exited. This event is being reported per 10CFR50.72(b)(3)(v) as a condition that at the time of discovery could have prevented the fulfillment of the safety function of the Control Room Emergency Filtration (CREF) system. The accident mitigation function of CREF could not be assured during the time Door R5-6 was open without administrative controls to close it, if necessary.
The licensee notified the site NRC Resident Inspector. |
Where | |
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Fermi ![]() Michigan (NRC Region 3) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
LER: | 05000341/LER-2008-003 |
Time - Person (Reporting Time:+1 h0.0417 days <br />0.00595 weeks <br />0.00137 months <br />) | |
Opened: | Patrick Fallon 15:45 Mar 26, 2008 |
NRC Officer: | Dan Livermore |
Last Updated: | Mar 26, 2008 |
44099 - NRC Website
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Unit 2 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
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