ENS 50287
ENS Event | |
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18:54 Jul 20, 2014 | |
Title | Ultimate Heat Sink Temperature Exceeded Technical Specification Limit |
Event Description | 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). |
Where | |
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Turkey Point ![]() Florida (NRC Region 2) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat | |
LER: | 05000250/LER-2014-004 |
Time - Person (Reporting Time:+1.13 h0.0471 days <br />0.00673 weeks <br />0.00155 months <br />) | |
Opened: | Robert Pell 20:02 Jul 20, 2014 |
NRC Officer: | Donald Norwood |
Last Updated: | Aug 8, 2014 |
50287 - NRC Website
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Unit 3 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
Unit 4 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (95 %) |
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 | |