ML24018A098
| ML24018A098 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 01/18/2024 |
| From: | Strand D Florida Power & Light Co |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| L-2024-007 | |
| Download: ML24018A098 (1) | |
Text
ATTN: Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 RE:
Turkey Point Nuclear Plant Unit 4 Docket No. 50-251 lnservice Inspection Program Owner's Activity Report (OAR-1)
L-2024-007 10 CFR 55a January 18, 2024 Attached find the Owner's Activity Report (Form OAR-1), for Turkey Point Unit 4 (PTN4-34),
Fifth lnservice Inspection Interval, Third Period, and IWE Third Interval, Second Period. The Form OAR-1, Owner's Activity Report, implements Code Case N-532-5.
Should you have any questions regarding this submission, please contact Mr. Kenneth Mack, Fleet Licensing Manager, at 561-904-3635.
Sincerely, 1") '- c:..-, -s \\ :;---
Di'anne Strand O
General Manager, Regulatory Affairs Florida Power & Light Company Enclosure cc:
USNRC Regional Administrator, Region II USNRC Project Manager, Turkey Point Nuclear Plant, Units 3 and 4 USNRC Senior Resident Inspector, Turkey Point Nuclear Plant, Units 3 and 4 Florida Power & Light Company 9760 S.W. 3441" Street Homestead, FL 33035
Turkey Point Nuclear Plant, Unit 4 L-2024-007 Docket Nos. 50-251 Enclosure Page 1 of 5
Turkey Point Nuclear Plant, Unit 4 L-2024-007 Docket Nos. 50-251 Enclosure Page 2 of 5 TABLE 1 ITEMS WITH FLAWS OR RELEVANT CONDITIONS THAT REQUIRED EVALUATION FOR CONTINUED SERVICE Examination Category and Item Number Item Description Evaluation Description E-A E1.30 Moisture Barrier Degradation AR02421997, AR02422598 and EC297448 Rev2 Discovery: Several areas were identified damaged on the moisture barrier located on the 14 elevation. During the repair phase of the moisture barrier, water was observed to be flowing out of the containment moisture barrier and pooling on the 14-foot elevation of the containment building. Chemical analysis confirmed that water in the moisture barrier was borated water. The source of the borated water was either from the refueling cavity or the spent fuel pool (SFP). The water was pumped from the moisture barrier after cavity drained down.
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Conclusion:==
An engineering analysis requested the entire moisture barrier to be removed, washed, and left removed to allow the joint to dry during the current run cycle. The moisture barrier was to be replaced during PTN 4-34, but during PT4-34, the refueling cavity liner in the lower portion of the refueling cavity was sealed with InstaCotetmML to determine if the liner in that section of the cavity was the source of the leakage. Engineering inspection during the outage verified that the moisture barrier area remained dry during PT4-34 confirming that the leakage
Turkey Point Nuclear Plant, Unit 4 L-2024-007 Docket Nos. 50-251 Enclosure Page 3 of 5 TABLE 1 ITEMS WITH FLAWS OR RELEVANT CONDITIONS THAT REQUIRED EVALUATION FOR CONTINUED SERVICE Examination Category and Item Number Item Description Evaluation Description identified during the previous outage emanated from leakage past the lower cavity liner.
Repairs of the lower cavity liner are planned to occur during PT4-35. EC297448 was revised to justify leaving the moisture barrier out for an additional cycle until repairs of the lower cavity complete. This will allow full confirmation that the refueling cavity repairs are effective in eliminating future borated water intrusion into inaccessible areas.
Turkey Point Nuclear Plant, Unit 4 L-2024-007 Docket Nos. 50-251 Enclosure Page 4 of 5 TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE Code Class Item Description Description Of Work Date Completed Repair/Replacement Plan Number 1/A 4-285D Replace Valve 10/11/2023 RR40660009-01/02 1/A 4P200B Replace Pump Rotating Element, Studs and Nuts 10/18/2023 RR40802767-01 1/A RV-4-551A Replace Valve 10/08/2023 RR40829834-01 1/A RV-4-551C Replace Valve 10/22/2023 RR40829802-06 1/A RV-4-551B Replace Valve 10/08/2023 RR40829789-01 2/B RV-4-1413 Replace Valve 10/10/2023 RR40858461-01 2/B RV-4-1406 Replace Valve 10/09/2023 RR40829882-01 2/B RV-4-1410 Replace Valve 10/09/2023 RR40829869-01 2/B CV-4-2901 Repair Valve bonnet thread (Heli-Coil insert) 10/16/2023 RR40829433-05
Turkey Point Nuclear Plant, Unit 4 L-2024-007 Docket Nos. 50-251 Enclosure Page 5 of 5 TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE Code Class Item Description Description Of Work Date Completed Repair/Replacement Plan Number 3/C 4P9C Replace Pump 03/31/2023 RR40824276-01 3/C 4-50-311 Replace Check Valve and Expansion Joint 10/02/2023 RR40857433-01 3/C 4-50-331 Replace Check Valve and Expansion Joint 10/20/2023 RR40857434-01 3/C RV-4-1423 Replace Valve and Bolting 10/21/2023 RR40953960-01 3/C RV-4-1423 Replace Valve and Bolting 10/12/2023 RR40829887-01 MC T4P32 Replace Containment Electrical Penetration 10/11/2023 RR40787277-04 MC S209 (PEN-39)
Replace Blind Flange Studs 10/21/2023 RR40829801-02