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The following information was provided by … The following information was provided by the licensee via fax:</br>At time 0207 CDT, Cooper Nuclear Station (CNS) entered Technical Specification (Limiting Condition for Operation) LCO 3.0.3 due to declaring core spray subsystems A and B inoperable. This declaration was based on an issue with relays installed from the same manufacturing batch. The ability of the relays to function correctly to annunciate loss of logic power was called into question and they were declared inoperable. The plant has initiated actions to repair/replace affected relays.</br>This event is reportable under 10 CFR 50.72(b)(2)(i) as an initiation of any nuclear plant shutdown required by Technical Specifications. In addition, this event Is reportable under 10 CFR 50.72(b)(3)(v) as a condition that could have prevented the fulfillment of a safety function for the core spray systems.</br>NRC Resident Inspector was notified.</br>* * * UPDATE ON 5/8/2023 AT 1335 EDT FROM ANDREW ASKINS TO BRIAN LIN * * *</br>The following information was provided by the licensee via email:</br>Technical Specification LCO 3.0.3 was exited at 0805 CDT on May 8, 2023. A reasonable expectation of operability was developed for the core spray subsystems A and B. There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. Shutdown was initiated and power was reduced approximately 45 percent. Reactor power is currently at 55 percent at the time of notification.</br>Notified R4DO (Werner) via email.</br>* * * UPDATE ON 5/9/2023 AT 1441 EDT FROM ANDREW ASKINS TO DONALD NORWOOD * * *</br>The following information was provided by the licensee via email:</br>CNS is retracting the 8-hour 10 CFR 50.72(b)(3)(v) non-emergency notification, for a condition that could have prevented the fulfillment of a safety function, made on May 8, 2023, at 0207 CDT (EN# 56509). Subsequent evaluation concluded that the core spray subsystems remained operable in accordance with the Technical Specifications Requirements 3.5.1, ECCS - Operating. As a result of the core spray system remaining operable, no loss of safety function occurred. The NRC Senior Resident Inspector has been notified.</br>Notified R4DO (Werner).has been notified.
Notified R4DO (Werner).
07:07:00, 8 May 2023 +
56,509 +
06:25:00, 8 May 2023 +
07:07:00, 8 May 2023 +
The following information was provided by … The following information was provided by the licensee via fax:</br>At time 0207 CDT, Cooper Nuclear Station (CNS) entered Technical Specification (Limiting Condition for Operation) LCO 3.0.3 due to declaring core spray subsystems A and B inoperable. This declaration was based on an issue with relays installed from the same manufacturing batch. The ability of the relays to function correctly to annunciate loss of logic power was called into question and they were declared inoperable. The plant has initiated actions to repair/replace affected relays.</br>This event is reportable under 10 CFR 50.72(b)(2)(i) as an initiation of any nuclear plant shutdown required by Technical Specifications. In addition, this event Is reportable under 10 CFR 50.72(b)(3)(v) as a condition that could have prevented the fulfillment of a safety function for the core spray systems.</br>NRC Resident Inspector was notified.</br>* * * UPDATE ON 5/8/2023 AT 1335 EDT FROM ANDREW ASKINS TO BRIAN LIN * * *</br>The following information was provided by the licensee via email:</br>Technical Specification LCO 3.0.3 was exited at 0805 CDT on May 8, 2023. A reasonable expectation of operability was developed for the core spray subsystems A and B. There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. Shutdown was initiated and power was reduced approximately 45 percent. Reactor power is currently at 55 percent at the time of notification.</br>Notified R4DO (Werner) via email.</br>* * * UPDATE ON 5/9/2023 AT 1441 EDT FROM ANDREW ASKINS TO DONALD NORWOOD * * *</br>The following information was provided by the licensee via email:</br>CNS is retracting the 8-hour 10 CFR 50.72(b)(3)(v) non-emergency notification, for a condition that could have prevented the fulfillment of a safety function, made on May 8, 2023, at 0207 CDT (EN# 56509). Subsequent evaluation concluded that the core spray subsystems remained operable in accordance with the Technical Specifications Requirements 3.5.1, ECCS - Operating. As a result of the core spray system remaining operable, no loss of safety function occurred. The NRC Senior Resident Inspector has been notified.</br>Notified R4DO (Werner).has been notified.
Notified R4DO (Werner).
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100 +
00:00:00, 9 May 2023 +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
19:58:26, 4 January 2024 +
06:25:00, 8 May 2023 +
Donald Norwood + and Brian Lin +
true +
false +
-0.0292 d (-0.7 hours, -0.00417 weeks, -9.5886e-4 months) +
07:07:00, 8 May 2023 +
URL"URL" is a <a href="/Special:Types/URL" title="Special:Types/URL">type</a> and predefined property provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a> to represent URI/URL values.