ML18107A207

Response to Request for Additional Information on the 2017 Steam Generator Inservice Inspection Report

ML18107A207
Person / Time
Site:	Surry
Issue date:	04/12/2018
From:	Simmons R Virginia Electric & Power Co (VEPCO)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
18-120
Download: ML18107A207 (4)

Text

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 APR 1 2 2018 United States Nuclear Regulatory Commission Attention:

Document Control Desk Washington, DC 20555-0001 VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT 2 Serial No.: SPS LIC/CGL Docket No.: License No.: RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION 2017 STEAM GENERATOR INSERVICE INSPECTION REPORT 18-120 R3 50-281 DPR-37 By letter dated October 26, 2017 (Serial No.17-415), Virginia Electric and Power Company (Dominion Energy Virginia) submitted information summarizing the results of steam generator (SG) tube inspections performed at Surry Power Station Unit 2 during the spring 2017 refueling outage. On March 12, 2018, the NRC requested additional information related to the SG inspections.

The NRC's question and Dominion Energy Virginia's response are provided in the attachment to this letter. If yoU have* any' questions . or require

• additional information, please contact ~rs. Candee Lovett at (757) 365-2178.

Sincerely,*

Roy,Simrnons

.. Plant Manager Surry Power Station I Attachment

-Response to NRC Requ~st for Aqditional Information . Regarding Spring 2017. Steam Generator lnservice.

Inspection Report -Surry Power Station U,nit 2 ... Commitment.s made in this letter: None cc: U.S. Nuclear Regulatory Commission

• Region II Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, Georgia 30303

• Ms. K. R. Cotton Gross ..:.. Surry NRC Project Manager U. S. Nuclear Regulatory Commission One White* Flint North Mail Stop 08 G9A 11555 Rockville Pike Rockville, Maryland 20852 Mr. J. R. Hall -North Anna NRC Project Manager U. S. Nuclear Regulatory Commission One White Flint North Mail Stop 08 B1A 11555 Rockville Pike Rockville, Maryland 20852 NRC Senior Resident Inspector Surry Power Station Mr. R. A. Smith Authorized Nuclear Inspector Surry Power Station Serial No.: 18-120 Docket No.: 50-281 Page 2 of 2 ATTACHMENT Serial No.: 18-120 Docket No.: 50-281 Response to NRC Request for Additional Information Regarding Spring 2017 Steam Generator lnservice Inspection Report Surry Power Station Unit 2 Virginia Electric and Power Company (Dominion Energy Virginia)

Serial No.: 18-120 Docket No.: 50-281 Attachment RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION REGARDING SURRY UNIT 2 SPRING 2017 STEAM GENERATOR TUBE INSPECTIONS By letter dated October *16, 2014 (Agencywide Documents Access and Management System Accession No. ML 17310A235}, Virginia Electric and Power Company (Dominion), the licensee, submitted information summarizing the results of the spring 2017 steam generator (SG) inspections performed at Surry Power Station, Unit 2. In order to complete its review, the U.S. Nuclear Regulatory Commission staff requests the following additional information.

The Dominion response is provided below. 1. In Table 3 (pages 5 -6) of the October 26, 2017, report, four indications are noted in three tubes in SG B (row 18, column 81 (two indications), row 34 column 66, and row 41 column 42). According to the table, all four of these indications were present prior to the 2017 outage and showed no change since 2014, yet are being initially reported in the 2017 inspection report. Since Technical Specification Section 6.6.3.d requires the reporting of location, orientation (if linear), and measured sizes (if available) of. service induced indications, please confirm

• the accuracy of the information included in Table 3. If the four indications were identified prior to 2017, please discuss any insights into why they were not reported previously.

Please also confirm that all service-induced indications that were identified during the spring 2017 outage were included in the October 26, 2017, report. RESPONSE:

The information presented in Table 3 in the October 26, 2017 report is accurate.

The four (4) indications in question are very small and located at tlie top of the tubesheet, adjacent to the expansion transition.

Due to the small amplitude of the indications, they are .difficult to identify and were not detected prior to the spring 2017 examination.

However, once the. indications were identified during the 2017 examination, an historical evaluation was performed and determined the indications were present in the 2014 data. Consequenfly,*

the 2014 data was compared to the 2017 data, and it was concluded the indicaUoris had not changed during_ that time period. All identified service-induced

• indications are included in the spring 2017 Surry Unit 2 Steam Generator Tube Inspection Report. Page 1 of 1