ENS 53259

v t e ENS Event
14:00 Mar 13, 2018
Title	Off-Site Power Unavailable Due to Winter Storm
Event Description	On March 13, 2018 at 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> [EDT], with the reactor in Cold Shutdown condition, both 345kV incoming power lines and 23 kV Shutdown Transformer became unavailable during the Northeast winter storm. Per procedures, the emergency on-site emergency power supplies (Emergency Diesel Generators) were running and providing power to essential systems. In addition, the back-up Diesel Air Compressor was in service and one Reactor Protection System bus was on the back-up power supply prior to the loss. With both 345kV incoming power lines and 23 kV Shutdown Transformer unavailable, Pilgrim Nuclear Power Station procedures direct a report be made to the NRC per the requirements of Title 10 Code of Federal Regulations 50.72(b)(3)(v), any event that could have prevented the fulfillment of the safety function. No actual loss of safety function has occurred since the on-site emergency power supplies are maintaining the reactor in a safe shutdown condition and removing residual heat. The loss of incoming power is under investigation. This event had no impact on the health and/or safety of the public. The NRC Resident Inspector has been notified.

ENS 53259 +/-
Where
Pilgrim Massachusetts (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat
Time - Person (Reporting Time:+1.9 h0.0792 days <br />0.0113 weeks <br />0.0026 months <br />)
Opened:	Michael Hettwer 15:54 Mar 13, 2018
NRC Officer:	Dong Park
Last Updated:	Mar 13, 2018
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v • d • e

v t e Emergency Notification System
Pilgrim with 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat
WEEKMONTHYEAR2018-03-13T14:00:00 [Table view]
[ENS list for Pilgrim]

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