ML17187A086
| ML17187A086 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 07/12/2017 |
| From: | Michael Wentzel Plant Licensing Branch II |
| To: | Nazar M Florida Power & Light Co |
| WENTZEL M, DORL/LPLII-2, 415-6459 | |
| References | |
| CAC MF8523 | |
| Download: ML17187A086 (4) | |
Text
UNITED STATES NUCLEAR REGULATORY.COMMISSION WASHINGTON, D.C. 20555-0001 Mr. Mano Nazar President and Chief Nuclear Officer Nuclear Division Florida Power & Light Company Mail Stop: EX/JB 700 Universe Blvd.
Juno Beach, FL 33408 July 12, 2017
SUBJECT:
TURKEY POINT NUCLEAR GENERATING UNIT NO. 4 - REVIEW OF STEAM GENERATOR TUBE INSPECTION REPORT FOR CYCLE 29 REFUELING OUTAGE (CAC NO. MF8523)
Dear Mr. Nazar:
By letter dated October 18, 2016, as supplemented by letter dated March 14, 2017, Florida Power & Light Company (the licensee) submitted its steam generator tube inspection report for Turkey Point Nuclear Generating Unit No. 4 (Turkey Point 4) in accordance with Turkey Point Technical Specification 6.9.1.8. The report summarizes the steam generator tube inspections that the licensee performed April 2016, during the Turkey Point 4 Cycle 29 Refueljng Outage.
By electronic mail dated February 10, 2017, the U.S. Nuclear Regulatory Commission (NRC) staff requested additional information. By letter dated March 14, 2017, the licensee responded to the request.
The NRC staff completed its review of the submittals and concluded that the licensee provided the information required by the Technical Specifications. No additional follow-up is required at this time. This completes the NRC staff efforts for Cost Activity Code No. MF8523. The enclosure documents the NRC staff's review of the submittals.
Docket No. 50-251
Enclosure:
As stated cc w/enclosures: Distribution via Listserv Sincerely, lLL{,U/\\/
Michael J. Wek.J, Project Manager Plant Licensing Branch 11-2 Division of Operating Reactor Liqmsing Office of Nuclear Reactor Regulation
REVIEW BY THE OFFICE OF NUCLEAR REACTOR REGULATION SPRING 2016 STEAM GENERATOR TUBE INSPECTION REPORT FLORIDA POWER & LIGHT COMPANY TURKEY POINT NUCLEAR GENERATING STATION, UNIT 4 DOCKET NO. 50-251 By letter dated October 18, 2016 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML16298A391), as supplemented by letter dated March 14, 2017 (ADAMS Accession No. ML17090A432), Florida Power & Light Company (the licensee) submitted information summarizing the results of the spring 2016 steam generator tube inspections performed at Turkey Point Nuclear Generating Station Unit No. 4 (Turkey Point 4) during refueling outage (RFO) 29. By electronic mail dated February 10, 2017 (ADAMS Accession No. ML17044A205), the U.S. Nuclear Regulatory Commission (NRC) staff requested additional information. The licensee's supplemental letter dated March 14, 2017, responded to the request.
Turkey Point 4 has three Westinghouse Model 44F steam generators (SGs), which were placed in service in 1983. Each SG has 3,214 thermally treated Alloy 600 tubes. The tubes are supported by stainless steel tube support plates with quatrefoil-shaped holes and V-shaped anti-vibration bars.
The licensee provided the scope, extent, method, and results of the Turkey Point 4 SG tube inspections in the documents referenced above. After reviewing the information provided by the licensee, the NRC staff has the following comment and observation:
- A 77 percent through-wall foreign object wear indication was reported during RFO 29 (2016) on a tube located at row 17, column 71 (R17C71) in SG B. A similar foreign object wear indication was previously reported during RFO 27 (2012) at a nearby location on a tube located at R17C74 in SG B. The licensee's operational assessment regarding the 77 percent through-wall foreign object wear indication considered two scenarios. Under the first scenario, the loose part affecting R 17C71 is considered a new foreign object that would migrate to another location by RFO 30. In the second scenario, the loose part affecting R17C71 is the same foreign object that affected R17C74 in 2012. Further discussion can be found in the March 14, 2017, letter.
Based on a review of the information provided, the NRC staff concludes that the licensee provided the information required by their technical specifications. In addition, the NRC staff concludes that there are no technical issues that warrant follow-up actions at this time, since the inspections appear to be consistent with the objective of detecting potential tube degradation and the inspection results appear to be consistent with industry operating experience at similarly designed and operated units.
Enclosure
ML17187A086 OFFICE NRR/DORL/LPL2-2/PM NRR/DORL/LPL2-2/LA NAME MWentzel BClayton DATE 07/11/2017 07/11/2017 OFFICE NRR/DORL/LPL2-2/BC NRR/DORL/LPL2-2/PM NAME UShoop RSchaaf for MWentzel DATE 07/12/2017 07/12/2017