ENS 48013

v t e ENS Event
12:52 Jun 11, 2012
Title	High Pressure Core Spray Inoperable
Event Description	On June 11, 2012, at 0845 hours0.00978 days <br />0.235 hours <br />0.0014 weeks <br />3.215225e-4 months <br />, an unexpected Division 3 battery DC system trouble alarm was received in the control room along with indication of lowering battery voltage. As a result of this condition, the plant operators declared the Division 3 DC electrical power subsystem inoperable at 0852 hours0.00986 days <br />0.237 hours <br />0.00141 weeks <br />3.24186e-4 months <br /> and entered the applicable Technical Specifications which require the High Pressure Core Spray System (HPCS) be declared inoperable. HPCS is a single-train safety system and its inoperable status is considered a loss of safety function. The cause of the trouble alarm was failure of the normal battery charger. Following a walkdown inspection of the Division 3 DC electrical bus with no abnormalities noted, the reserve charger was placed in service at 0858 hours0.00993 days <br />0.238 hours <br />0.00142 weeks <br />3.26469e-4 months <br /> to supply the bus. At 1245 hours0.0144 days <br />0.346 hours <br />0.00206 weeks <br />4.737225e-4 months <br />, the HPCS system was declared operable following restoration of the Division 3 DC electrical power subsystem to operable status. This event is being reported in accordance with 10 CFR 50.72(b)(3)(v)(D). The NRC Resident Inspector has been notified.

ENS 48013 +/-
Where
Perry Ohio (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
LER:	05000440/LER-2012-002
Time - Person (Reporting Time:+1.82 h0.0758 days <br />0.0108 weeks <br />0.00249 months <br />)
Opened:	Thomas Morse 14:41 Jun 11, 2012
NRC Officer:	Mark Abramovitz
Last Updated:	Jun 11, 2012
48013 - NRC Website
v • d • e

v t e Emergency Notification System
Perry with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR2022-06-24T16:57:00 [Table view]
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