ENS 57146: Difference between revisions
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| emergency class = Non Emergency | | emergency class = Non Emergency | ||
| notification date = 05/26/2024 13:52 | | notification date = 05/26/2024 13:52 | ||
| retracted = Yes | |||
| notification by = Randall Maus | | notification by = Randall Maus | ||
| NRC officer = Natalie Starfish | | NRC officer = Natalie Starfish | ||
| event date = 05/26/2024 07:20 CDT | | event date = 05/26/2024 07:20 CDT | ||
| last update date = | | last update date = 06/13/2024 | ||
| title = Two of Three Essential Chilled Water Trains Declared Inoperable | | title = Two of Three Essential Chilled Water Trains Declared Inoperable | ||
| event text = The following information was provided by the licensee by phone and email: | | event text = The following information was provided by the licensee by phone and email: | ||
| Line 23: | Line 24: | ||
This was determined to be reportable within 8 hours as required by 10CFR50.72(b)(3)(v)(D). | This was determined to be reportable within 8 hours as required by 10CFR50.72(b)(3)(v)(D). | ||
NRC Resident Inspector has been notified. | NRC Resident Inspector has been notified. | ||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2024/ | * * * RETRACTION ON 6/13/24 AT 1552 EDT FROM RAY RULEY TO BILL NYTKO * * * | ||
The following information was provided by the licensee by phone and email: | |||
This is a communication to retract the 8-hour notification Event Notification (EN) 57146 reported to the NRC pursuant to 10 CFR 50.72(b)(3)(v)(D) on 05/26/2024. Based on a subsequent engineering review of the conditions that existed at the time of discovery, it was determined that: | |||
1) The maximum postulated leak rate, conservatively estimated, from the ''B'' Train essential cooling water return piping thermowell in the mechanical auxiliary building sump room would have been less than the administrative allowable limit for leakage in this room during a design basis accident, | |||
2) No adjacent safety related components or functions would have been adversely affected, and | |||
3) the return line leakage represented a negligible impact regarding essential cooling water system inventory and the system ability to cool required components. | |||
Therefore, it was recommended that the ''B'' Train essential cooling water system with the as-found leakage condition be considered operable. Therefore, this event notification is being retracted. | |||
The NRC Resident Inspector has been notified. | |||
Notified R4DO (Taylor) | |||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2024/20240614en.html#en57146 | |||
}}{{unit info | }}{{unit info | ||
| Unit = 1 | | Unit = 1 | ||
Latest revision as of 07:20, 14 June 2024
| Where | |
|---|---|
South Texas  Texas (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+1.53 h0.0638 days <br />0.00911 weeks <br />0.0021 months <br />) | |
| Opened: | Randall Maus 13:52 May 26, 2024 |
| NRC Officer: | Natalie Starfish |
| Last Updated: | Jun 13, 2024 |
| 57146 - NRC Website
| |
South Texas with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |