ML19301C562

Review of Steam Generator Inservice Inspection Report for Unit 2 End of Cycle 28 Refueling Outage

ML19301C562
Person / Time
Site:	Surry
Issue date:	11/01/2019
From:	Geoffrey Miller Plant Licensing Branch II
To:	Mladen F Virginia Electric & Power Co (VEPCO)
Miller G
References
EPID L-2019-LRO-0045
Download: ML19301C562 (3)

Text

November 1, 2019 Mr. Fred Mladen Site Vice President Surry Power Station Virginia Electric & Power Company 5570 Hog Island Road Surry, VA 23883-0315

SUBJECT:

SURRY POWER STATION, UNIT 2 - REVIEW OF STEAM GENERATOR INSERVICE INSPECTION REPORT FOR UNIT 2 END OF CYCLE 28 REFUELING OUTAGE (EPID L-2019-LR0-0045)

Dear Mr. Mladen:

By letter dated May 16, 2019 (Agencywide Documents Access and Management System Accession No. ML19154A353), Virginia Electric and Power Company (the licensee),

submitted information summarizing the results of the fall 2018 steam generator inspections performed at Surry Power Station, Unit 2 (Surry 2) in accordance with Technical Specification (TS) 6.6.A.3, "Steam Generator Tube Inspection Report." The report summarizes the steam generator tube inspections that the licensee performed in fall 2018 during the Surry 1 Cycle 28 refueling outage. The U.S. Nuclear Regulatory Commission (NRC) staff reviewed the submittal and concludes that the licensee provided the information required by TS 6.6.A.3. The enclosure documents the NRC staff's review of the submittal and completes the NRC staff's efforts for Enterprise Project Identifier (EPID) L-2019-LR0-0045.

Any inquiries can be directed to Mr. Ed Miller at 301-415-2481 or via e-mail at Ed.Miller@nrc.gov.

Sincerel\;/ * *

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G. Edward Miller, Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-281

Enclosure:

As stated cc w/encl: Listserv

REVIEW BY THE OFFICE OF NUCLEAR REACTOR REGULATION FALL 2018 STEAM GENERATOR TUBE INSERVICE INSPECTION REPORT VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION, UNIT 2 DOCKET NO. 50-281 By letter dated May 16, 2019 (Agencywide Documents Access and Management System Accession No. ML19154A353, Virginia Electric and Power Company (the licensee), submitted information summarizing the results of the fall 2018 steam generator (SG) tube inspections performed at Surry Power Station, Unit 2. These inspections were performed during the twenty-eighth refueling outage (RF028) at the end of operating cycle twenty-eight.

Surry Power Station, Unit 2, has three Westinghouse model 51 F SGs. Each SG has 3,342 thermally treated Alloy 600 tubes with an outside diameter of 0.875 inches and a nominal wall thickness of 0.050 inches. The tubes are hydraulically expanded at each end for the full depth of the tubesheet. The tubes are supported by stainless steel support plates with quatrefoil-shaped holes. The U-bend region of the tubes installed in rows 1-8 was thermally treated after bending to reduce stress.

The licensee provided the scope, extent, methods, and results of the SG tube inspections in the letter referenced above. In addition, the licensee described corrective actions (e.g., tube plugging) taken in response to the inspection findings.

Based on the review of the information provided, the U.S. Nuclear Regulatory Commission (NRC) staff has the following observations/comments:

• Indications detected during the SG A and SG C inspections included wear from foreign objects and wear at the antivibration bars, tube support plates, and flow distribution baffle. No cracking was detected. No tubes were plugged during the refueling outage.

• No adverse conditions were noted during visual inspection of upper steam drum moisture separator components, feedring components, and top of bundle U-bend region components through the secondary manway in SG B.

Based on its review of the information provided, the NRC staff concludes that the licensee provided the information required by Technical Specification 6.6.A.3, "Steam Generator Tube Inspection Report." In addition, the NRC staff concludes that there are no technical issues that warrant follow-up action because the inspections seem consistent with the objective of detecting potential tube degradation and the inspection results seem consistent with industry operating experience at similarly designed and operated units.

Principal Contributor: Paul A. Klein Date: November 1, 2019 Enclosure

SUBJECT:

SURRY POWER STATION, UNIT 2- REVIEW OF STEAM GENERATOR INSERVICE INSPECTION REPORT FOR UNIT 2 END OF CYCLE 28 REFUELING OUTAGE (EPID L-2019-LR0-0045) DATED NOVEMBER 1, 2019 DISTRIBUTION:

PUBLIC PM Reading File RidsNrrPMSurry Resource RidsNrrLAKGoldstein Resource RidsNrrDorlLp2-1 Resource RidsACRS_MailCtr Resource RidsRgn2MailCenter Resource RidsNrrDnrlNcsg Resource SBloom, NRR/DNRL Paul Klein, NRR/DNRL Alan Huynh, NRR/DMLR Andrew Johnson, NRR/DNRL Greg Makar, NRR/DNRL Leslie Terry, NRR/DNRL ADAMS A ccess1on No.: ML19301C562 *b1y memoran dum OFFICE NRR/DORL/LPL4/PM NRR/DORL/LPL2-1/LA NRR/DNLR/NCSG/BC*

NAME VThomas KGoldstein SBloom DATE 10/28/19 10/29/19 10/28/19 OFFICE NRR/DORL/LPL2-1 /BC NRR/DORL/LPL2-1/PM NAME MMarkley EMiller DATE 11/01/19 11/01/19 OFFICIAL RECORD COPY