ENS 57220
ENS Event | |
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09:55 Jul 9, 2024 | |
Title | Loss of Communications Capabilities |
Event Description | The following information was provided by the licensee via email:
On July 09, 2024, at 0455 CDT the National Weather Service reported to Cooper Nuclear Station that the National Warning System radio tower near Shubert, Nebraska was not working. The Shubert Tower transmitter activates the Emergency Alert System/Tone Alert Radios used for public notification. Additional information from the National Weather Service received July 10, 2024, at 0455 CDT determined that the Shubert Tower transmitter was not able to be repaired within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and is still non-functional. A backup notification system has been verified to be available during this period. This is considered to be a major loss of the Public Prompt Notification System capability. Due to the unplanned loss of the primary notification system for greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, this condition is reportable under 10CFR50.72(b)(3)(xiii), since the backup alerting methods do not meet the primary system design objective. A backup notification system is available to use for notifications if needed. The NRC Senior Resident Inspector has been informed. |
Where | |
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Cooper ![]() Nebraska (NRC Region 4) | |
Reporting | |
10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
Time - Person (Reporting Time:+23.62 h0.984 days <br />0.141 weeks <br />0.0324 months <br />) | |
Opened: | Brian Stander 09:32 Jul 10, 2024 |
NRC Officer: | Eric Simpson |
Last Updated: | Jul 10, 2024 |
57220 - NRC Website
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Unit 1 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
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