ENS Event | |
|---|---|
03:04 Sep 14, 2007 | |
| Title | Potential Reactor Pressure Boundary Leakage |
| Event Description | During an investigation in response to a low megger reading, a small amount of water was discovered in the environmental qualification boundary of the 22B RCS Thot thermowell (TE-3-422B2). Analysis of the water on 9/13/07 at 2304 showed Cesium 137 and 134, and Magnesium 54 indicating that the source of water intrusion into the thermowell was likely reactor coolant system (RCS) fluid. We are continuing the investigation for potential causes of water intrusion other than the Reactor Coolant System. This report is being made based on the previous indication of RCS leakage into 23A, RCS Tcold thermowell (TE-3-420) [see EN#43627 from 09/10/07] and similar discovery in our preliminary investigation.
PTN Unit 3 Technical Specifications (TS) Limiting Condition for Operation (LCO) 3.4.6.2.a permits no reactor coolant pressure boundary leakage in Modes 1-4. This report to the NRC is pursuant to the requirements of 10 CFR 50.72 (b)(3)(ii)(A) as a degraded condition. Turkey Point Unit 3 is presently defueled. The licensee will notify the NRC Resident Inspector. |
| Where | |
|---|---|
Turkey Point  Florida (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
| Time - Person (Reporting Time:+-0.77 h-0.0321 days <br />-0.00458 weeks <br />-0.00105 months <br />) | |
| Opened: | James Russell 02:18 Sep 14, 2007 |
| NRC Officer: | Jeff Rotton |
| Last Updated: | Sep 14, 2007 |
| 43641 - NRC Website
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WEEKMONTHYEARENS 575832025-03-03T23:03:0003 March 2025 23:03:00
[Table view]10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Degraded Condition ENS 564742023-04-15T15:12:00015 April 2023 15:12:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded RCS Pressure Boundary Degraded ENS 555742021-11-12T21:05:00012 November 2021 21:05:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Reactor Coolant System Pressure Boundary Degraded ENS 499332014-03-20T02:02:00020 March 2014 02:02:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Potential Leak Discovered Around Pressurizer Heater Bank ENS 463622010-10-26T02:00:00026 October 2010 02:00:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Containment Liner Corrosion Degradation ENS 443992008-08-07T16:30:0007 August 2008 16:30:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Degraded Principal Safety Barrier ENS 436412007-09-14T03:04:00014 September 2007 03:04:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Potential Reactor Pressure Boundary Leakage ENS 436272007-09-08T16:28:0008 September 2007 16:28:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Reactor Pressure Boundary Leakage 2025-03-03T23:03:00 | |