ML092800441

Summary of Conference Call with Dominion Energy Kewaunee Inc., to Discuss the ASME Section XI Inservice Inspection Aging Management Program

ML092800441
Person / Time
Site:	Kewaunee
Issue date:	10/16/2009
From:	Hernandez-Quinones S License Renewal Projects Branch 1
To:	Dominion Energy Kewaunee
Tran T, NRR/DLR, 415-3617
References
TAC MD9408
Download: ML092800441 (6)

Text

October 16, 2009 LICENSEE: Dominion Energy Kewaunee, Inc.

FACILITY: Kewaunee Power Station

SUMMARY

OF CONFERENCE CALL WITH DOMINION ENERGY KEWAUNEE, INC., TO DISCUSS THE ASME SECTION XI INSERVICE INSPECTION AGING MANAGEMENT PROGRAM (TAC NO. MD9408)

On September 22, 2009, the U.S. Nuclear Regulatory Commission (NRC or the staff) conducted a conference call (teleconference) with representatives from Dominion Energy Kewaunee, Inc.

(DEK). The purpose of the teleconference was to discuss DEK responses to the staffs requests for additional information (RAIs) regarding the Kewaunee Power Station (KPS) ASME Section XI Inservice Inspection, Aging Management Program (AMP).

On a letter dated July 13, 2009 (ML091810958) the staff submitted its RAIs related to KPS AMPs. In the RAI letter the staff had two requests that were related to the ASME Section XI -

Inservice Inspection Program (RAIs B2.1.2-1 & B2.1.2-2). DEK responded to the staffs RAIs on a letter dated August 17, 2009 (ML092320093).

During the teleconference the staff indicated that the responses to RAIs B2.1.2-1 & B2.1.2-2 did not provide enough information for the staff to make its evaluation. The main issues discussed during the teleconference are summarized below.

Issue #1 - Inadequate sample size of small bore piping welds The applicant does not have a separate small bore piping one-time inspection aging management program as recommended by GALL, but chooses to use its inservice inspection program instead. In its current ISI interval, it selected, based on its risk-informed ISI, eight out of 96 Class I small bore welds for volumetric examinations. This is part of the ISI program but the applicant actually proposed to take credit of the eight samples for the small bore piping one-time inspection. The staff believe the sample size is not adequate and stated that the sample size should be about 24 samples (25% of the population). A size significantly less needs to be technically justified for adequacy.

Issue #2 - Small bore socket welds not addressed The applicant stated that the socket weld issue has been resolved and that the staff accepted using VT-2 and surface examinations. The staffs official position has been what was recommended in GALL Section XI.M35. It recommends a one time volumetric examination on small bore piping.

The applicant stated that there is no industry demonstrated means of performing volumetric examination to detect cracking at the inside diameter of a socket weld. The NRC staff responded with the following:

GALL Section XI.M35 recommends one-time volumetric inspection of Class 1 small bore piping. VT-2 or surface examination is not sufficient.

The staff understands that there is not yet a qualified UT technique on socket welds.

However, the industry has been working on developing ultrasonic testing (UT) techniques on socket welds and, in many occasions, has been successful. The staff provided a list of utilities that are known to have used the technique which includes Susquehanna, Ginna, Peach Bottom and Nine Mile. Duane Arnold, whose application is currently under review, has a plan to use UT techniques.

There are other options available in addressing socket welds. For example, destructively examine a few welds at an opportunistic time, such as pipe replacement during plant modifications.

As a result of the discussions DEK indicated that they will supplement their responses to RAIs B2.1.2-1 & B2.1.2-2 to provide additional information to the staff. A list of teleconference participants is enclosed.

\\RA\\

Samuel Hernandez, Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-305

Enclosure:

As stated cc w/ encl: See next page

ML092800441 OFFICE LA:DLR PM:DLR:RPB1 BC:DLR:RPB1 PM:DLR:RPB1 NAME SFigueroa SHernandez BPham SHernandez DATE 10/15/09 10/16/09 10/16/09 10/16/09

Letter to Dominion Energy Kewaunee, Inc. from S. Hernandez dated October 16, 2009

SUMMARY

OF CONFERENCE CALL WITH DOMINION ENERGY KEWAUNEE, INC., TO DISCUSS THE ASME SECTION XI INSERVICE INSPECTION AGING MANAGEMENT PROGRAM (TAC NO. MD9408)

DISTRIBUTION:

PUBLIC B. Holian / S. Lee (RidsNrrDlr)

B. Pham (RidsNrrDlrRpb1)

S. Hernandez V. Perin A. Hiser B. Fu J. Dozier T. Bilik, RIII M. Kunowski S. Burton K. Barclay

LIST OF PARTICIPANTS FOR CONFERENCE CALL WITH DOMINION ENERGY KEWAUNEE, INC.,

TO DISCUSS THE ASME SECTION XI INSERVICE INSPECTION AGING MANAGEMENT PROGRAM FOR KEWAUNEE POWER STATION SEPTEMBER 22, 2009 PARTICIPANTS AFFILIATION Samuel Hernandez U.S. Nuclear Regulatory Commission Allen Hiser U.S Nuclear Regulatory Commission Bart Fu U.S Nuclear Regulatory Commission Paul Aitken Dominion Stu Thickman Dominion John Voss Dominion ENCLOSURE

Kewaunee Power Station cc:

Resident Inspectors Office U.S. Nuclear Regulatory Commission N490 Hwy 42 Kewaunee, WI 54216-9510 Mr. Chris L. Funderburk Director, Nuclear Licensing and Operations Support Dominion Resources Services, Inc.

Innsbrook Technical Center - 2SE 5000 Dominion Boulevard Glen Allen, VA 23060-6711 Mr. Thomas L. Breene Dominon Energy Kewaunee, Inc.

Kewaunee Power Station N490 Highway 42 Kewaunee, WI 54216 Mr. Michael J. Wilson, Director Nuclear Safety & Licensing Dominion Energy Kewaunee, Inc.

Kewaunee Power Station N490 Highway 42 Kewaunee, WI 54216 Mr. William R. Matthews Senior Vice President - Nuclear Operations Innsbrook Technical Center - 2SE 5000 Dominion Boulevard Glen Allen, VA 23060-6711 Mr. Alan J. Price Vice President - Nuclear Engineering Innsbrook Technical Center - 2SE 5000 Dominion Boulevard Glen Allen, VA 23060-6711 Mr. William D. Corbin Director - Nuclear Engineering Innsbrook Technical Center - 3NE 5000 Dominion Boulevard Glen Allen, VA 23060-6711 Mr. Paul C. Aitken Supervisor - License Renewal Project Innsbrook Technical Center - 3NE 5000 Dominion Boulevard Glen Allen, VA 23060-6711 Mr. David A. Sommers Supervisor - Nuclear Engineering Innsbrook Technical Center - 2SE 5000 Dominion Boulevard Glen Allen, VA 23060-6711 Ms. Lillian M. Cuoco, Esq.

Senior Counsel Dominion Resources Services, Inc.

120 Tredegar Street Riverside 2 Richmond, VA 23219 Mr. Stephen E. Scace Site Vice President Dominion Energy Kewaunee, Inc.

Kewaunee Power Station N490 Highway 42 Kewaunee, WI 54216 Mr. David R. Lewis Pillsbury Winthrop Shaw Pittman, LLP 2300 N Street, N.W.

Washington, DC 20037-1122 Mr. Ken Paplham E 4095 Sandy Bay Rd.

Kewaunee, WI 54216 Mr. Richard Gallagher Senior Scientist, License Renewal Dominion Resources Services, Inc.

Route 156, Rope Ferry Road Waterford, CT 06385