ENS 56912: Difference between revisions
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| NRC officer = Brian Parks | | NRC officer = Brian Parks | ||
| event date = 01/03/2024 12:57 EST | | event date = 01/03/2024 12:57 EST | ||
| last update date = | | last update date = 02/12/2024 | ||
| title = Pressure Boundary Degraded / Both Trains of High Pressure Safety Injection Inoperable | | title = Pressure Boundary Degraded / Both Trains of High Pressure Safety Injection Inoperable | ||
| event text = At 1257 EST on January 3, 2024, it was determined that a class 1 system barrier had a through wall flaw with leakage. The leakage renders both trains of high pressure safety injection inoperable. The unit is being cooled down to cold shutdown to comply with technical specifications. | | event text = At 1257 EST on January 3, 2024, it was determined that a class 1 system barrier had a through wall flaw with leakage. The leakage renders both trains of high pressure safety injection inoperable. The unit is being cooled down to cold shutdown to comply with technical specifications. | ||
| Line 22: | Line 22: | ||
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officer Report Guidance: | The following additional information was obtained from the licensee in accordance with Headquarters Operations Officer Report Guidance: | ||
At the time of the discovery, the unit was shutdown in mode 3. The unit was experiencing signs of reactor coolant system leakage and a shutdown was initiated in order to search for possible sources. The unit is currently cooling down and proceeding to mode 5, where the safety function is not required. | At the time of the discovery, the unit was shutdown in mode 3. The unit was experiencing signs of reactor coolant system leakage and a shutdown was initiated in order to search for possible sources. The unit is currently cooling down and proceeding to mode 5, where the safety function is not required. | ||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2024/ | * * *UPDATE AT 1257 EST ON 02/12/24 FROM B. MURRELL TO T. HERRITY*** | ||
The purpose of this notification update is to retract a portion of a previous report, made on 1/03/2024 at 1257 EST (EN 56912). Notification of the event to the NRC was initially made as a result of declaring both trains of unit 2 high pressure safety injection system inoperable due to reactor coolant barrier through wall leak on the vent line for the 2A2 safety injection tank. | |||
Subsequent to the initial report, Florida Power and Light has concluded that the through wall leak rate was insignificant, and therefore the safety injection system's safety-related function was maintained. | |||
Therefore, this portion of the event is not considered a safety system functional failure and is not reportable to the NRC pursuant 10 CFR 50.72(3)(v)(D). | |||
This update does not affect the original 10 CFR 50.72(b)(3)(ii)(A) report for the degraded condition related to the reactor coolant barrier through wall leak. | |||
The NRC Resident Inspector has been notified. | |||
Notified R2DO (Miller). | |||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2024/20240213en.html#en56912 | |||
}}{{unit info | }}{{unit info | ||
| Unit = 2 | | Unit = 2 | ||
Latest revision as of 07:30, 13 February 2024
| Where | |
|---|---|
Saint Lucie  Florida (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+-2.32 h-0.0967 days <br />-0.0138 weeks <br />-0.00318 months <br />) | |
| Opened: | Eric Laettner 15:38 Jan 3, 2024 |
| NRC Officer: | Brian Parks |
| Last Updated: | Feb 12, 2024 |
| 56912 - NRC Website
| |
Saint Lucie with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |