ENS 41551

v t e ENS Event
21:00 Mar 30, 2005
Title	Identification of Design and Operating Procedure Deficiencies
Event Description	The following information was provided by the licensee (licensee text in quotes): On March 7, 2005, a condition assessment and resolution document was initiated to document several possible design and operating procedure deficiencies affecting Appendix R and Station Blackout (SBO) events. The deficiencies were identified during development of a proposed modification affecting existing Appendix R and SBO power supplies. On March 30, 2005, it was determined that the applicable Appendix R success criteria could not be assured under all of the postulated scenarios described in the Updated Final Safety Analysis Report (UFSAR). Specifically, during the scenarios where Combustion Turbine Generator (CTG) 11-1 (the dedicated Appendix R alternate power source) or other station CTGs are operating in parallel with the grid, availability of the alternate power source under Appendix R and SBO scenarios cannot be assured. Therefore, this event is being reported under 50.72(b)(3)(ii)(B). Actions to address the potentially affected Appendix R and SBO scenarios were put in place on March 7, 2005, when the deficiencies were identified. The NRC Resident Inspector has been notified.

ENS 41551 +/-
Where
Fermi Michigan (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
LER:	05000341/LER-2005-002
Time - Person (Reporting Time:+-2.78 h-0.116 days <br />-0.0165 weeks <br />-0.00381 months <br />)
Opened:	Jeff Yeager 18:13 Mar 30, 2005
NRC Officer:	Mark Abramovitz
Last Updated:	Mar 30, 2005
41551 - NRC Website
v • d • e

v t e Emergency Notification System
Fermi with 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
WEEKMONTHYEAR2021-05-03T13:30:00 [Table view]
[ENS list for Fermi]

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