ENS 45438: Difference between revisions

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| event date = 10/15/2009 12:04 CDT
| event date = 10/15/2009 12:04 CDT
| last update date = 10/15/2009
| last update date = 10/15/2009
| title = Momentary Loss Of Shutdown Cooling With Autostart Of Emergency Diesel Generator
| title = Momentary Loss of Shutdown Cooling with Autostart of Emergency Diesel Generator
| event text = At 1204 power was lost to Safeguards Bus '5' and Emergency Diesel Generator 'A' started and re-energized Bus '5.'
| event text = At 1204 power was lost to Safeguards Bus '5' and Emergency Diesel Generator 'A' started and re-energized Bus '5.'
Event was caused by starting SI Pump 'A' to fill SI Accumulator 'A' which resulted in a Tertiary Auxiliary Transformer trip and lockout.  At the time RHR Pump 'A' was in operation and tripped, RHR Pump 'B' was started within 2 minutes using the Abnormal Operating Procedure and flow restored to the RCS.  RCS temperature decreased initially due to an increase in service water cooling and actions were taken to stabilize RCS Temperature.
Event was caused by starting SI Pump 'A' to fill SI Accumulator 'A' which resulted in a Tertiary Auxiliary Transformer trip and lockout.  At the time RHR Pump 'A' was in operation and tripped, RHR Pump 'B' was started within 2 minutes using the Abnormal Operating Procedure and flow restored to the RCS.  RCS temperature decreased initially due to an increase in service water cooling and actions were taken to stabilize RCS Temperature.

Latest revision as of 21:11, 1 March 2018

ENS 45438 +/-
Where
Kewaunee Dominion icon.png
Wisconsin (NRC Region 3)
Reporting
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition

10 CFR 50.72(b)(3)(iv)(A), System Actuation
Time - Person (Reporting Time:+1.12 h0.0467 days <br />0.00667 weeks <br />0.00153 months <br />)
Opened: David Karst
18:11 Oct 15, 2009
NRC Officer: Steve Sandin
Last Updated: Oct 15, 2009
45438 - NRC Website
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