ENS Event | |
|---|---|
23:00 Apr 7, 2022 | |
| Title | Both Trains of Residual Heat Removal Inoperable |
| Event Description | The following information was provided by the licensee via fax or email:
At 1900 EDT on 04/07/22, while Unit 4 was in Mode 4 following a refueling outage, it was discovered that both trains of residual heat removal (RHR) were simultaneously inoperable due to gas voiding. At 2032 EDT corrective actions were completed and both trains of RHR were declared operable. This condition is being reported pursuant to 10 CFR 50.72(b)(3)(v)(B). The NRC Resident Inspector has been notified.
The following information was provided by the licensee via email: On 4/8/2022 at 0110 EDT Turkey Point Unit 4 notified the [NRC Operations Center (NRCOC)] pursuant to 10 CFR 50.72(b)(3)(v)(B) that both trains of Residual Heat Removal (RHR) were simultaneously inoperable due to the presence of gas voids that were identified during scheduled system gas accumulation testing. Subsequent evaluation by [Florida Power & Light (FPL)] Engineering has concluded that both trains of RHR remained operable and capable of performing their specified safety function. This NRCOC notification is a retraction of EN# 55831. The licensee notified the NRC Resident Inspector. Notified R2DO (Miller) |
| Where | |
|---|---|
Turkey Point  Florida (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat | |
| Time - Person (Reporting Time:+2.17 h0.0904 days <br />0.0129 weeks <br />0.00297 months <br />) | |
| Opened: | Ryan Frank 01:10 Apr 8, 2022 |
| NRC Officer: | Lloyd Desotell |
| Last Updated: | Apr 11, 2022 |
| 55831 - NRC Website | |
Unit 4 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Hot Shutdown (0 %) |
| After | Hot Shutdown (0 %) |
WEEKMONTHYEARENS 558312022-04-07T23:00:0007 April 2022 23:00:00
[Table view]10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat Both Trains of Residual Heat Removal Inoperable ENS 502872014-07-20T18:54:00020 July 2014 18:54:00 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat Ultimate Heat Sink Temperature Exceeded Technical Specification Limit ENS 471472011-08-11T20:31:00011 August 2011 20:31:00 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Loss of Intake Cooling Water for 20 Minutes 2022-04-07T23:00:00 | |