ENS 43627
ENS Event | |
|---|---|
16:28 Sep 8, 2007 | |
| Title | Reactor Pressure Boundary Leakage |
| Event Description | On September 7, 2007, a small amount of water was discovered in the environmental qualification boundary of the 3B RCS Tcold thermowell (TE-3-420) during inspection of the thermowell. Subsequent mass spectroscopy analysis conducted at 1228, on September 8, 2007, indicated small levels of lithium, boron, strontium, and bromine indicating that the source of the water intrusion into the thermowell was likely reactor coolant system (RCS) fluid.
Turkey Point Unit 3 Technical Specification (TS) Limiting Condition for Operation (LCO) 3.4.6.2.a permits no reactor coolant system pressure boundary leakage. As a result of the chemical analysis and indication of fluid in the thermowell, this condition is being reported to the NRC pursuant to the requirements of 10 CFR 50.72(b)(3)(ii)(A) as a degraded condition. An investigation of the source of the water intrusion into the thermowell is ongoing. Leakage into the TE-3-420 was previously noted during the last refueling outage for Unit 3 in March 2006 and a Short Notice Outage (SNO) conducted in June 2007. Previous inspections and sampling did not indicate the presence of boron or activity levels that were consistent with RCS water. At the time of discovery, Turkey Point Unit 3 was in Operational Mode 6 (Refueling). Turkey Point Unit 3 is presently defueled. This is a late prompt notification. The NRC Resident inspector will be notified. |
| Where | |
|---|---|
Turkey Point  Florida (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
| Time - Person (Reporting Time:+46.38 h1.933 days <br />0.276 weeks <br />0.0635 months <br />) | |
| Opened: | Edward Nielson 14:51 Sep 10, 2007 |
| NRC Officer: | Jason Kozal |
| Last Updated: | Sep 10, 2007 |
| 43627 - NRC Website
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WEEKMONTHYEARENS 564742023-04-15T15:12:00015 April 2023 15:12:00
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