Peach Bottom Atomic Power Station: Major Loss of Emergency Preparedness Capabilities

 Peach Bottom - LOSS OF TECHNICAL SUPPORT CENTER VENTILATION SYSTEM

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
8/11/2020 - 8/12/2020

** EVENT NUMBERS **

54829

Power Reactor	Event Number: 54829
Facility: Peach Bottom Region: 1     State: PA Unit: [2] [3] [] RX Type: [2] GE-4,[3] GE-4 NRC Notified By: John Whelan HQ OPS Officer: Brian P. Smith	Notification Date: 08/11/2020 Notification Time: 20:22 [ET] Event Date: 08/11/2020 Event Time: 13:34 [EDT] Last Update Date: 08/11/2020
Emergency Class: Non Emergency 10 CFR Section: 50.72(b)(3)(xiii) - Loss Comm/Asmt/Response	Person (Organization): MEL GRAY (R1DO)

Unit

SCRAM Code

RX Crit

Initial PWR

Initial RX Mode

Current PWR

Current RX Mode

2

N

Y

97

Power Operation

97

Power Operation

3

N

Y

100

Power Operation

100

Power Operation

Event Text

LOSS OF TECHNICAL SUPPORT CENTER VENTILATION SYSTEM "At 1334 EDT on Tuesday August 11th, the Peach Bottom Atomic Power Station (PBAPS) Technical Support Center (TSC) Ventilation System lost power due to a trip of the Station Blackout (SBO) electric power supply breaker. The trip was due to a fault at the Conowingo Dam and Conowingo was not able to realign electric power to the SBO within an hour. Power restoration is complete and TSC Ventilation was restored at 1725 EDT. "This report is being submitted pursuant to 10CFR 50.72(b)(3)(xiii) as a Major Loss of Emergency Preparedness Capabilities due to a reduction in the effectiveness of the Onsite Technical Support Center (TSC). "The NRC Resident Inspector has been notified."