At 1605 EST on 11/12/21, it was determined that the
RCS Pressure Boundary does not meet
ASME Section XI, Table
IWB-341 0-1, 'Acceptable Standards' due to a
through wall leak of the Core Exit Thermocouple Nozzle Assembly.
Measures have been taken to establish Mode 5 for corrective actions.
This event is being reported pursuant to 10 CFR 50.72(b)(3)(ii)(A).
The NRC Resident Inspector has been notified.
- * * RETRACTION ON 3/28/2022 AT 0849 EDT FROM DAVID STOIA TO MIKE STAFFORD * * *
The following information was provided by the licensee via email:
On 11/12/2021 EN 55574 reported possible evidence of pressure boundary through-wall leakage observed on a Core Exit Thermocouple (CET) tube. On 3/10/2022, based on laboratory analysis of the affected CET tube section, FPL Engineering determined that there was no pressure boundary through-wall leakage associated with this event. Analysis identified that the leakage likely originated from an adjacent threaded compression fitting on a tubing joint. This condition complies with ASME Section XI requirements and is therefore not reportable. This follow-up NRCOC notification is a retraction of EN 55574.
The NRC Resident Inspector has been notified.
Notified R2DO (Miller).
