ML071640024

Summary of Telephone Conference Call Held on June 8, 2007, Between the U.S. Nuclear Regulatory Commission and Wolf Creek Nuclear Operating Corporation Concerning Requests for Additional Information Pertaining to the Wolf Creek, Unit 1, LRA

ML071640024
Person / Time
Site:	Wolf Creek
Issue date:	06/15/2007
From:	Veronica Rodriguez NRC/NRR/ADRO/DLR/RLRB
To:	Wolf Creek
rodriguez v m, ADRO/DLR/RLRB, 415-3703
References
Download: ML071640024 (7)

Text

June 15, 2007 LICENSEE: Wolf Creek Nuclear Operating Corporation FACILITY: Wolf Creek Generating Station, Unit 1

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON JUNE 8, 2007, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND WOLF CREEK NUCLEAR OPERATING CORPORATION, CONCERNING REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE WOLF CREEK GENERATING STATION, UNIT 1, LICENSE RENEWAL APPLICATION The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Wolf Creek Nuclear Operating Corporation held a telephone conference call on June 8, 2007, to discuss and clarify the staffs requests for additional information (RAIs) concerning the Wolf Creek Generating Station, Unit 1, license renewal application. The telephone conference call was useful in clarifying the intent of the staffs RAIs. provides a listing of the participants and Enclosure 2 contains a listing of the RAIs discussed with the applicant, including a brief description on the status of the items.

The applicant had an opportunity to comment on this summary. A mutually agreeable date for the response is within 30 days from the date of this letter. If you have any questions, please contact me at 301-415-3703 or e-mail vmr1@nrc.gov.

/RA/

Verónica M. Rodríguez, Project Manager License Renewal Branch B Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-482

Enclosures:

As stated cc w/encls: See next page

ML071640024 DOCUMENT NAME: C:\MyFiles\Copies\ML071640024.wpd OFFICE PM:RLRB:DLR LA:DLR BC:RLRB:DLR NAME VRodriguez SFigueroa RAuluck DATE 06/14/07 06/13/07 06/15/07

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON JUNE 8, 2007, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND WOLF CREEK NUCLEAR OPERATING CORPORATION, CONCERNING REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE WOLF CREEK GENERATING STATION, UNIT 1, LICENSE RENEWAL APPLICATION DISTRIBUTION:

HARD COPY:

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Wolf Creek Generating Station cc Jay Silberg, Esq. Supervisor Licensing Pillsbury Winthrop Shaw Pittman, LLP Wolf Creek Nuclear Operating Corporation 2300 N Street, NW P.O. Box 411 Washington, DC 20037 Burlington, KS 66839 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission U.S. Nuclear Regulatory Commission Resident Inspectors Office/Callaway Plant 611 Ryan Plaza Drive, Suite 400 8201 NRC Road Arlington, TX 76011-7005 Steedman, MO 65077-1032 Senior Resident Inspector Kevin J. Moles, Manager U.S. Nuclear Regulatory Commission Regulatory Affairs P.O. Box 311 Wolf Creek Nuclear Operating Corporation Burlington, KS 66839 P.O. Box 411 Burlington, KS 66839 Chief Engineer, Utilities Division Kansas Corporation Commission Lorrie I. Bell, Project Manager 1500 SW Arrowhead Road Wolf Creek Nuclear Operating Corporation Topeka, KS 66604-4027 P.O. Box 411 Burlington, KS 66839 Office of the Governor State of Kansas Mr. Gordon A. Clefton Topeka, KS 66612 Nuclear Energy Institute 1776 I Street, NW, Suite 400 Attorney General Washington, DC 20006-3708 120 S.W. 10th Avenue, 2nd Floor Topeka, KS 66612-1597 County Clerk Coffey County Courthouse 110 South 6th Street Burlington, KS 66839 Thomas A. Conley, Section Chief Radiation and Asbestos Control Kansas Department of Health and Environment Bureau of Air and Radiation 1000 SW Jackson, Suite 310 Topeka, KS 66612-1366 Vice President Operations/Plant Manager Wolf Creek Nuclear Operating Corporation P.O. Box 411 Burlington, KS 66839

TELEPHONE CONFERENCE CALL WOLF CREEK GENERATING STATION, UNIT 1 LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS JUNE 8, 2007 PARTICIPANTS AFFILIATIONS Verónica M. Rodríguez U.S. Nuclear Regulatory Commission (NRC)

Raul Hernandez NRC Clifford Marks Information Systems Laboratories Lorrie Bell Wolf Creek Nuclear Operating Corporation Eric Blocher Strategic Teaming and Resource Sharing Alliance (STARS)

Paul Crawley STARS Richard Geiger STARS Enclosure 1

REQUESTS FOR ADDITIONAL INFORMATION WOLF CREEK GENERATING STATION, UNIT 1 LICENSE RENEWAL APPLICATION JUNE 8, 2007 The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Wolf Creek Nuclear Operating Corporation held a telephone conference call on June 8, 2007, as a followup discussion and request for clarification to the applicants response to the following requests for additional information (RAIs) concerning the Wolf Creek Generating Station (WCGS), Unit 1, license renewal application (LRA). The applicants response to these RAIs was submitted by letter dated May 2, 2007.

RAI 2.3.3.16-1 License renewal drawings LRA-WCGS-KJ-M-12KJ01 and LRA-WCGS-KJ-M-12KJ04, at locations H-5 and H-6, show standby diesel generator jacket water expansion tanks, TKJ01A and TKJ01B, respectively. The tanks are within the safety-related boundary and are highlighted in green for meeting the requirements of Title 10 Code of Federal Regulations 54.4(a)(1)

(10 CFR 54.4). Each tank has several lines extending from it that also appear to be safety-related; however, these lines are not highlighted. The lines in question are portions of 010-HBD-1, 066-HBD-1, 073-HBD-1, 011-HBD-1, 166-HBD-1, 173-HBD-1, and the chemical addition fittings.

LRA Section 2.1 states that every component meeting the scoping criterion of 10 CFR 54.4(a)(1), was included within the scope of the license renewal rule. The staff requests that the applicant justify the exclusion of these lines from the scope of license renewal.

Discussion: Based on the discussion with the applicant, the staff indicated that the response to this RAI requires clarification. The staff requested that the applicant justify why tank vents are not included within the scope of license renewal in accordance with 10 CFR 54.4(a)(2) as they functionally support the operation of the tank.

The applicant agreed with the staff and stated that the vents will be added to the scope of license renewal. The applicant will provide its formal response in writing.

RAI 2.3.4.2-1 License renewal drawing LR-WCGS-AB-M-12AB01, at locations D-3, D-6, H-3 and H-6, shows four atmospheric relief valves silencers that are not color coded as within the scope of license renewal and subject to an aging management review (AMR). These four silencers are attached to piping which are within the scope of license renewal in accordance with 10 CFR 54.4(a)(2). If the pipings intended function is to provide a pressure boundary for the steam flow path, then the staff requests that the applicant explain why the silencers are not within the scope of license renewal in accordance with 10 CFR 54.4(a)(2) for functional support. The staff also requests that the applicant describe the physical configuration of the silencers such that if they fail they will not prevent the atmospheric relief valves from performing their intended function.

Enclosure 2

Discussion: Based on the discussion with the applicant, the staff indicated that the response to this RAI requires clarification. The staff requested that the applicant address the potential effects of a degraded exhaust silencer on the intended function of the atmospheric relief valves.

The staff also requested that the applicant identify that no age related degradation of the atmospheric relief valve silencers could affect their intended function.

The applicant agreed with the staff position and stated that the atmospheric relief valves exhaust silencers will be added to the scope of license renewal. The applicant will provide its formal response in writing.

RAI 2.3.4.2-2 License renewal drawing LRA-WCGS-AB-M-12AB03, at locations F-8, E-8, C-8, and B-8, shows steam traps ST0001, ST0002, ST0003 and ST0004 that are not color coded as within the scope of license renewal and subject to an AMR. The steam traps are attached to 2-inch lines. The staff requests that the applicant explain why these four traps are not within the scope of license renewal in accordance with 10 CFR 54.4(a)(3) and how the lines are isolated.

Discussion: Based on the discussion with the applicant, the staff indicated that the response to this RAI requires clarification. The staff requested that the applicant address the function of the steam trap as a valve body with a pressure boundary function and that the steam traps configuration be described. The staff requested that the applicant clarify if there is an analysis or calculation that justify the exclusion of the steam traps from the scope of license renewal.

The applicant will provide its formal response in writing.

RAI 2.3.4.2-5 License renewal drawings for the main steam system have lines highlighted in green indicating that they are within the scope of license renewal and are required to support the system intended functions. However, multiple lines that are sized 1-inch and under, that branch off the highlighted lines with no valve or other interfacing components, are not highlighted.

The size 1-inch and under lines in the main steam system are included on license renewal drawings LRA-WCGS-AB-M-12AB03. Examples of these lines include those at locations G-8 (line 237-DBD-1), H-6 (off line 148-DBD-6), G-5 (off line 167-DBD-6), G-4 (line 317-DBD-1), H-3 (line DBD-1/2), E-8 (line 206-DBD-1), and D-7 (off line 241-DBD-36), among others.

The staff requests that the applicant justify the exclusion of the size 1-inch and under lines from the scope of license renewal. In addition, the staff requests that the applicant explain whether the impact of multiple line failures were considered on system intended functions.

Discussion: Based on the discussion with the applicant, the staff indicated that the response to this RAI requires clarification. The staff requested that the applicant clarify if there is an analysis or calculation that justify the exclusion of the 1" diameter piping from the scope of license renewal. The applicant will provide its formal response in writing.