ML16148A701

Response to Request for Additional Information Regarding ASME Section XI Inservice Inspection Program Relief Requests for Limited Coverage Examinations Performed in the Fourth 10-Year Inspection Interval

ML16148A701
Person / Time
Site:	Millstone
Issue date:	05/20/2016
From:	Mark D. Sartain Dominion Nuclear Connecticut
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
16-115A, CAC MF6569, RR-04-19
Download: ML16148A701 (4)

Text

Dominion Nuclear Connecticut, Inc.

5000 Dominion Boulevard, Glen Allen, VA 23060

..f Web Address: www.dom.com May 20, 2016 U.S. Nuclear Regulatory Commission Serial No. 16-115A Attention: Document Control Desk NRA/WDC RO Washington, DC 20555 Docket No. 50-336 License No. DPR-65 DOMINION NUCLEAR CONNECTICUT, INC.

MILLSTONE POWER STATION UNIT 2 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION REGARDING ASME SECTION XI INSERVICE INSPECTION PROGRAM RELIEF REQUESTS FOR LIMITED COVERAGE EXAMINATIONS PERFORMED IN THE FOURTH 10-YEAR INSPECTION INTERVAL (CAC NO. MF6569)

By letter dated July 30, 2015, Dominion Nuclear Connecticut, Inc. (DNC) submitted relief requests for limited coverage examinations performed in the first inspection period of the fourth 10-year inservice inspection interval for Millstone Power Station Unit 2 (MPS2). In an email dated March 8, 2016, the Nuclear Regulatory Commission transmitted a request for additional information (RAI) to DNC related to Relief Request RR-04-19. DNC responded to the RAI in a letter dated April 22, 2016. In the response, DNC agreed to provide additional weld filler metal information by May 23, 2016.

The attachment to this letter provides the weld filler metal information.

If you have any questions regarding this response, please contact Wanda Craft at (804) 273-4687.

Sincerely, Mark D. Sartain Vice President - Nuclear Engineering Commitments made in this letter: None

Attachment:

Response to Request for Additional Information for Limited Coverage Examinations Performed in the Fourth 10-Year Inspection Interval - RR-04-19 f)'pl)1

Serial No. 16-115A Docket No. 50-336

1. Page 2 of 2 cc: U.S. Nuclear Regulatory Commission Region I 2100 Renaissance Blvd, Suite 100 King of Prussia, PA 19406-2713 R. V. Guzman Senior Project Manager U.S. Nuclear Regulatory Commission One White Flint North, Mail Stop 08-C2 11555 Rockville Pike Rockville, MD 20852-2738 NRC Senior Resident Inspector Millstone Power Station

Serial No. 16-115A Docket No. 50-336 ATTACHMENT RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION FOR LIMITED COVERAGE EXAMINATIONS PERFORMED IN THE FOURTH 10-YEAR INSPECTION INTERVAL RR-04-19 DOMINION NUCLEAR CONNECTICUT, INC.

MILLSTONE POWER STATION UNIT 2

Serial No. 16-115A Docket No. 50-336 Attachment, Page 1 of 1 By letter dated July 30, 2015, Dominion Nuclear Connecticut, Inc. (DNC) submitted relief requests for limited coverage examinations performed in the first inspection period of the fourth 10-year inservice inspection interval for Millstone Power Station Unit 2 (MPS2). In an email dated March 8, 2016, the Nuclear Regulatory Commission (NRC) transmitted a request for additional information (RAI) to DNC related to Relief Request RR-04-19. DNC responded to the RAI in a letter dated April 22, 2016. In the response, DNC agreed to provide additional weld filler metal information by May 23, 2016. This attachment provides the weld filler metal information.

Question 1 The piping and components are described -as being constructed from "Stainless" or "Carbon" steel, but the alloys are not identified. For each weld, please provide the materials of construction for the pipes, weld metals, and welded components.

DNC Response For weld BSl-C-3004 the following materials apply:

Pipe -A376 TP316 Elbow-A403 WP316 Weld filler metal - The weld filler metal in welds associated with this system typically consists of a stainless steel material. This weld is a shop-fabricated weld from original plant construction. The construction drawing prepared by DRAVO Corporation identifies the root pass filler metal as W156/W486 and the completion filler metal as W504/W495, which are vendor specific designations.

Additional information:

In correspondence from Bechtel Corporation (the Architect Engineer for MPS2), to DRAVO Corporation (a piping supplier for MPS2), Bechtel directed DRAVO to use ER308L weld filler material in the fabrication of Type 316 stainless steel piping spools.

Based on this correspondence, DNC concludes that the weld filler metal for the subject weld BSl-C-3004 is ER308L.