ML18303A288

Response to Request for Additional Information Regarding Relief Request S2-I5-LMT-P01 Examination Category R-A, Preservice Weld Examinations

ML18303A288
Person / Time
Site:	Surry
Issue date:	10/18/2018
From:	Mark D. Sartain Virginia Electric & Power Co (VEPCO)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
18-199A
Download: ML18303A288 (4)

Text

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 October 18, 2018 United States Nuclear Regulatory Commission Serial No.: 18-199A Attention: Document Control Desk SPS-LIC/CGL RO Washington, D.C. 20555 Docket No.: 50-281 License No.: DPR-37 VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT 2 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION REGARDING RELIEF REQUEST S2-15-LMT-P01 EXAMINATION CATEGORY R-A, PRESER~ICE WELD EXAMINATIONS By letter dated June 4, 2018 (Serial No.18-199), Virginia Electric and Power Company (Dominion Energy Virginia) submitted relief requests for limited coverage examinations performed in the first period of the fifth 10-year inservice inspection interval at Surry Power Station Unit 2. One of the relief requests in the letter was Relief Request (RR)

S2-15-LMT-P01, "Examination Category R-A, Preservice Weld Examinations."

On September 25, 2018, the NRG requested additional information regarding RR S2-15-LMT-P01. The response to the NRC's request for additional information is provided in the attachment.

If you have further questions or require additional information, please contact Mr. Gary D. Miller at (804) 273-2771.

Respectfully, Mark D. Sartain Vice President - Nuclear Engineering and Fleet Support

Attachment:

Response to Request for Additional Information Regarding Relief Request S2-15-LMT-P01 - Examination Category R-A, Preservice Weld Examinations Commitments made by this letter: None

Serial No. 18-199A

• • Docket No. 50-281 Page 2 of 2 cc: U.S. Nuclear Regulatory Commission, Region II Marquis One Tower 245 Peachtree Center Avenue NE, Suite 1200 Atlanta, Georgia 30303-1257 Ms. A. Schiller NRC Project Manager - Surry U. S. Nuclear Regulatory Commission Mail Stop 07 E-5 One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2738 Mr. J. R. Hall NRC Senior Project Manager - North Anna U. S. Nuclear Regulatory Commission Mail Stop 08 G-9A One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2738 NRC Senior Resident Inspector Surry Power Station Mr. R. A. Smith Authorized Nuclear Inspector Surry Power Station

Serial No. 18-199A Docket No. 50-281 Attachment Response to Request for Additional Information Regarding Relief Request S2-15-LMT-P01 .

Examination Category R-A, Preservice Weld Examinations Virginia Electric and Power Company (Dominion Energy Virginia)

Surry Power Station Unit 2

Serial No. 18-199A

• • Docket Nos. 50-281 Attachment Page 1 of 1 Response to Request for Additional Information Regarding Relief Request S2-15-LMT-P01 Examination Category R-A, Preservice Weld Examinations Surry Power Station Unit 2 By. letter dated June 4, 2018 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML18159A034), Virginia Electric and Power Company (the licensee) requested relief from the examination coverage requirements that are specified in American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code) Case N-460, "Alternative Examination Coverage for Class 1 and Class 2 Welds,Section XI, Division 1." This code case is approved for use in Regulatory Guide 1.147, Revision 18. The licensee submitted the relief request pursuant to Title 10 of the Code of Federal Regulations (10 CFR) 50.55a(g)(5)(iii) and addressed the limited coverage of .preservice ultrasonic examinations for Class 1 pipe-to-valve and valve-to-pipe welds at Surry Power Station Unit 2 (SPS2).

On September 25, 2018, the NRC staff requested additional information to complete their review. The NRC question and the Dominion response are provided below.

1. Section 4 of the relief request indicates that the subject welds are new, reconstructed welds. Please clarify whether the weld reconstructions resulted from pressure boundary degradation (e.g., cracking due to fatigue). If so, please discuss why the licensee's examination coverages are sufficient to manage the effect of such degradation.

Dominion Response:

The reconstructed welds were related to valve replacements. No pressure boundary degradation issues were associated with the reconstructed welds.