ENS 47031: Difference between revisions

v t e ENS Event
18:40 Jul 6, 2011
Title	Technical Support Center (Tsc) Hvac Out of Service Due to Loss of Power
Event Description	At about 1440 EDT on July 6, 2011, the Technical Support Center (TSC) HVAC lost power during motor control switch testing. The transfer switch did not fully engage resulting in loss of power to the TSC HVAC fan motor. Troubleshooting was performed and power was restored to the TSC HVAC system at approximately 1625 EDT. This involved an emergent loss of the TSC capability that could not be readily remediated in less than the TSC staffing time of one hour. Unrelated to the first event, 13.2 KV power to the TMI station office buildings was lost at approximately 1740 EDT on July 6, 2011 due to a broken electric service pole. This resulted in another loss of the TSC HVAC that could not be readily remediated. At 2115 EDT power was restored and the ventilation was started. This event resulted in another reportable condition. These events affected the ability of the TSC ventilation to maintain adequate radiological habitability in the event of an emergency with an airborne radiological release. All other capabilities were unaffected by this emergent condition. Existing procedures provide direction to relocate TSC personnel in the event of a TSC habitability concern, however the backup facility does not have standby electrical power or a filtered ventilation system. The licensee has informed the NRC Resident Inspector.

ENS 47031 +/-
Where
Crane Pennsylvania (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness
Time - Person (Reporting Time:+3.12 h0.13 days <br />0.0186 weeks <br />0.00427 months <br />)
Opened:	Joe Shoffner 21:47 Jul 6, 2011
NRC Officer:	Charles Teal
Last Updated:	Jul 6, 2011
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v • d • e

v t e Emergency Notification System
Crane with 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness
WEEKMONTHYEAR2016-07-18T20:00:00 [Table view]
[ENS list for Crane]

@@ Line 16: / Line 16: @@
 | event date = 07/06/2011 14:40 EDT
 | last update date = 07/06/2011
-| title = Technical Support Center (Tsc) Hvac Out Of Service Due To Loss Of Power
+| title = Technical Support Center (Tsc) Hvac Out of Service Due to Loss of Power
 | event text = At about 1440 EDT on July 6, 2011, the Technical Support Center (TSC) HVAC lost power during motor control switch testing.  The transfer switch did not fully engage resulting in loss of power to the TSC HVAC fan motor.  Troubleshooting was performed and power was restored to the TSC HVAC system at approximately 1625 EDT.
 This involved an emergent loss of the TSC capability that could not be readily remediated in less than the TSC staffing time of one hour.

Latest revision as of 21:06, 1 March 2018