ENS 43116

v t e ENS Event
20:15 Jan 23, 2007
Title	Unanalyzed Condition
Event Description	Crystal River 3 has determined that an existing condition in the Decay Heat (DH) System is reportable under 10 CFR 50.72(b)(3)(ii)(B), an Unanalyzed Condition. Two valves in question are in series in the DH System drop leg from the Reactor Coolant System (RCS). They are Appendix R High-Low pressure interface valves, where 3 phase hot shorts from another power cable must be considered. A review of cable routing concluded that one of the valve's power cables and one of the valve's control power cables do not meet required separation criteria. There is a low probability that both could open due to hot shorts under normal operating RCS pressure and temperature conditions, therefore a rupture of the downstream piping in the Reactor Building or Auxiliary Building is possible. The postulated event is a Loss of Coolant Accident (LOCA) in the Auxiliary Building, which is an unanalyzed condition. This condition is similar to the one reported in EN 43098 on 01/12/2007. Cables in question are for the same valves, however, they are in a different area of the plant. The licensee will notify the NRC Resident Inspector.

ENS 43116 +/-
Where
Crystal River Florida (NRC Region 2)
Reporting

10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Time - Person (Reporting Time:+-3.8 h-0.158 days <br />-0.0226 weeks <br />-0.00521 months <br />)
Opened:	David Mcagy 16:27 Jan 23, 2007
NRC Officer:	Bill Gott
Last Updated:	Jan 23, 2007
43116 - NRC Website Loading map...
v • d • e

v t e Emergency Notification System
Crystal River with 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
WEEKMONTHYEAR2007-01-23T20:15:00 [Table view]
[ENS list for Crystal River]

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