ENS 40891

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v t e ENS Event
11:10 Jul 22, 2004
Title	Loss Of Power To Primary And Backup Offsite Siren System
Event Description	At 0710 hrs on 7/22/04 it was discovered by the Salem County 911 Center dispatcher that the primary and backup Alert Notification System (offsite siren system) activation controllers (computers) had lost power. The Salem County Siren computers are the activation controllers for all 34 offsite sirens located in the New Jersey portion of tile 10-mile EPZ. The 37 Delaware Sirens wore not affected. As per instructions, siren technicians were notified at 0748 hours0.00866 days <br />0.208 hours <br />0.00124 weeks <br />2.84614e-4 months <br /> and responded to the 911 Center at 0815 hours0.00943 days <br />0.226 hours <br />0.00135 weeks <br />3.101075e-4 months <br />. Power was restored to the primary computer at 0835 hours0.00966 days <br />0.232 hours <br />0.00138 weeks <br />3.177175e-4 months <br />. Subsequent investigation and troubleshooting has determined the following: Exact time of power loss is unknown. Last know/verified computer availability was at 1104 on 7/21/04 when a biweekly siren test was successfully completed. An automatic siren poll scheduled for 0645 on 7/22 did not occur which indicates that the loss of power occurred sometime between 1104 on 7/21 and 0645 on 7/22/04. Cause of loss of power was determined to be a failed UPS unit that both the primary and backup siren computers were powered from. The failed UPS was removed and primary computer re-powered directly from 911-center normal 120-volt house power. A siren poll was done and. The siren system was declared back in service at 0835 hours0.00966 days <br />0.232 hours <br />0.00138 weeks <br />3.177175e-4 months <br /> on 7/22/04. Two separate UPS units will be connected to the Siren activation computers by the end of day today, 7/22/04. The licensee notified State of New Jersey and the NRC Resident Inspector.

ENS 40891 +/-
Where
Salem New Jersey (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness
Time - Person (Reporting Time:+2.08 h0.0867 days <br />0.0124 weeks <br />0.00285 months <br />)
Opened:	S. Sauer 13:15 Jul 22, 2004
NRC Officer:	Arlon Costa
Last Updated:	Jul 22, 2004
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v • d • e

v t e Emergency Notification System
Salem with 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness
WEEKMONTHYEAR2014-02-14T06:13:00 [Table view]
[ENS list for Salem]

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