Event Notification Report for July 11, 2022

U.S. Nuclear Regulatory Commission
Operations Center

EVENT REPORTS FOR
07/08/2022 - 07/11/2022

EVENT NUMBERS
55981
Power Reactor
Event Number: 55981
Facility: Cooper
Region: 4     State: NE
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: Roy Giles
HQ OPS Officer: Kerby Scales
Notification Date: 07/07/2022
Notification Time: 22:49 [ET]
Event Date: 07/07/2022
Event Time: 16:01 [CDT]
Last Update Date: 07/07/2022
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(xiii) - Loss Comm/Asmt/Response
Person (Organization):
Proulx, David (R4DO)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 98 Power Operation 98 Power Operation
Event Text
LOSS OF NATIONAL WARNING SYSTEM TOWER

The following information was provided by the licensee via phone and fax:

"On 7/7/2022, at 0740 CDT, the National Weather Service reported to Cooper Nuclear Station that the NAWAS [(National Warning System)] radio tower near Shubert, Nebraska would neither transmit nor receive. The Shubert Tower transmitter activates the EAS [(Emergency Alert System)]/Tone Alert Radios used for public notification. Additional information from the National Weather Service received 7/7/2022 at 1601 [CDT] determined that the Shubert Tower transmitter is non-functional and would not likely be repaired within 24 hours. The backup notification system has been verified to be available throughout this period.

"This is considered to be a major loss of the Public Prompt Notification System capability. The primary notification system is not expected to be restored to service within 24 hours, and therefore this condition is reportable under 10 CFR 50.72(b)(3)(xiii), since the backup alerting methods do not meet the primary system design objective. The backup notification system is available to use for notifications if needed.

"The NRC Senior Resident has been informed."

The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:

The backup notification system has to be manually activated.

Page Last Reviewed/Updated Monday, July 11, 2022