Semantic search
| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 55831 | 7 April 2022 23:00:00 | 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat | Both Trains of Residual Heat Removal Inoperable | 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) | Residual Heat Removal | |
| ENS 50287 | 20 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 | At 1454 EDT on 20 July 2014, Turkey Point Units 3 and 4 entered the Action for Technical Specification (TS) 3.7.4, Ultimate Heat Sink (UHS). The action was entered because UHS temperature exceeded the limit of 100 degrees F due to a natural event. This report is in accordance with 10CFR50.72(b)(3)(v)(B) because UHS capability to remove residual heat is impacted. At 1800 EDT the NRC verbally approved a natural event Notice of Enforcement Discretion (NOED) which allows the ultimate heat sink temperature to exceed 100 degrees F up to 103 degrees F. Unit power levels have been maintained at Unit 3 100% and Unit 4 95%. The NRC Resident Inspector has been notified.
At 2046 on 7/20/14, Turkey Point Units 3 and 4 exited the Action for Technical Specification (TS) 3.7.4, Ultimate Heat Sink, when the ultimate heat sink (UHS) temperature decreased below the TS limit of 100 degrees F. At 1604 on 7/26/14, Turkey Point Units 3 and 4 entered the Action for TS 3.7.4, Ultimate Heat Sink. The action was entered because UHS temperature exceeded the limit of 100 degrees F. This report is in accordance with 10 CFR 50.72(b)(3)(v)(B) because UHS capability to remove residual heat is impacted. Turkey Point is currently complying with NOED No. 14-2-001, which allows a temporary maximum UHS temperature of 103 degrees F. The NRC Resident Inspector was notified. At 2058 on 7/26/14 the UHS average temperature was 100.3 degrees F and the peak temperature was 100.5 degrees F. Unit 4 is currently operating at 75% power in anticipation of elevated intake temperature in the next several days. Notified R2DO (Musser)
At 2102 on 7/26/14, Turkey Point Units 3 and 4 exited the Action for Technical Specification (TS) 3.7.4, Ultimate Heat Sink, when the ultimate heat sink (UHS) temperature decreased below the TS limit of 100 degrees F. At 1602 on 7/27/14, Turkey Point Units 3 and 4 entered the Action for TS 3.7.4, Ultimate Heat Sink. The action was entered because UHS temperature exceeded the limit of 100 degrees F. This report is in accordance with 10 CFR 50.72(b)(3)(v)(B) because UHS capability to remove residual heat is impacted. Turkey Point is currently complying with NOED No. 14-2-001, which allows a temporary maximum UHS temperature of 103 degrees F. The NRC Resident Inspector was notified. At 1913 on 7/27/14 the UHS average temperature was 101.1 degrees F and the peak temperature was 101.3 degrees F. Units 3 and 4 are currently operating at 75% power in anticipation of elevated intake temperature in the next several days. Notified R2DO (Musser)
At 2212 on 7/27/14, Turkey Point Units 3 and 4 exited the Action for Technical Specification (TS) 3.7.4, Ultimate Heat Sink, which was entered at 1602 on 7/27/14, when the ultimate heat sink (UHS) temperature decreased below the TS limit of 100 degrees F. At 1445 on 7/28/14, Turkey Point Units 3 and 4 entered the Action for TS 3.7.4, Ultimate Heat Sink. The action was entered because UHS temperature exceeded the limit of 100 degrees F. This report is in accordance with 10 CFR 50.72(b)(3)(v)(B) because UHS capability to remove residual heat is impacted. Turkey Point is currently complying with NOED No. 14-2-001, which allows a temporary maximum UHS temperature of 103 degrees F. At 1946 on 7/28/14, UHS temperature decreased below the TS limit of 100 degrees F and Turkey Point Units 3 and 4 exited the Action for Technical Specification (TS) 3.7.4, Ultimate Heat Sink. 'The NRC Resident Inspector was notified. Peak UHS temperature reached on 7/28/2014 was 101.1 degrees F. Units 3 and 4 are currently operating at 75 percent power in anticipation of continued elevated intake temperatures. Notified R2DO (Musser)
At 1455 on 08/07/14, Turkey Point Units 3 and 4 entered the Action for TS 3/4.7.4, Ultimate Heat Sink. The action was entered because UHS temperature exceeded the limit of 100 degrees F. This report is in accordance with 10 CFR 50.72(b)(3)(v)(B) because UHS capability to remove residual heat is impacted. Turkey Point is currently complying with NOED No. 14-2-001, which allows a temporary maximum UHS temperature of 103 degrees F. The NRC Resident lnspector was notified. UHS temperature was at 100.4 F at the time of the notification. Notified R2DO (Nease).
At 1445 EDT on 08/08/14 Turkey Point Units 3 and 4 entered Action for TS 3/4.7.4, Ultimate Heat Sink. The action was entered because UHS temperature exceeded the limit of 100 degrees F. On 8/08/14 at 1556 EDT Turkey Point Units 3 and 4 received Amendment No. 261 to Renewed Facility Operating License No. DPR-31 and Amendment No. 256 to Renewed Facility Operating License No. DPR-41 for the Turkey Point Nuclear Generating Unit Nos. 3 and 4 and exited the Action for TS 3/4.7 .4, Ultimate Heat Sink. The licensee informed the NRC Resident Inspector. UHS temperature was at 101.24 F at the time of the notification. Notified R2DO (Nease). | 05000250/LER-2014-004 | |
| ENS 47147 | 11 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 | At 1631 hours on Thursday, August 11, 2011, Turkey Point Unit 3 lost the function of the Intake Cooling Water (ICW) System for approximately 20 minutes. This is reportable in accordance with 10 CFR 50.72(b)(3)(v)(B) and (D). Loss of function occurred when manual valve 3-50-406, ICW/Component Cooling Water (CCW) Heat Exchanger Outlet Valve, failed closed. Valve 3-50-406 is located in the common discharge line preventing flow through both ICW headers to the CCW heat exchangers. Operations Department personnel opened the bypass valves associated with the failed valve and restored ICW flow to the CCW heat exchangers at approximately 1651 hours. Presently, Unit 3 is in Mode 1 at 100% power with all systems stable. The failed valve is a manual 24" butterfly valve. The bypass valve can maintain full flow. During this event, Operations personnel monitored CCW temperature. Unit 3 briefly entered T.S. 3.0.3 before restoring flow using the bypass. A high RCP temperature alarm was received following the momentary loss of ICW flow. The valve failure was accompanied with a loud bang. The licensee notified the NRC Resident Inspector. | 05000250/LER-2011-002 |