ML14206A012

Request for Additional Information, Relief Requests I3R-08, RPV Interior Attachments and I3R-09, RPV Pressure-Retaining Welds, Exam Interval Extensions, Third 10-year Inservice Inspection Interval

ML14206A012
Person / Time
Site:	Wolf Creek
Issue date:	08/01/2014
From:	Lyon C Plant Licensing Branch IV
To:	Heflin A Wolf Creek
Lyon C
References
TAC MF3321, TAC MF3322
Download: ML14206A012 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 August 1, 2014 Mr. Adam C. Heflin President, Chief Executive Officer, and Chief Nuclear Officer Wolf Creek Nuclear Operating Corporation Post Office Box 411 Burlington, KS 66839

SUBJECT:

WOLF CREEK GENERATING STATION- REQUEST FOR ADDITIONAL INFORMATION RE: REQUEST FOR ALTERNATIVE 13R-08 and 13R-09 (TAC NOS. MF3321 AND MF3322)

Dear Mr. Heflin:

By letter dated January 8, 2014, Wolf Creek Nuclear Operating Corporation (the licensee) submitted to the U.S. Nuclear Regulatory Commission (NRC) for approval requests for alternative 13R-08 and 13R-09 for the Wolf Creek Generating Station. The licensee proposed alternatives to certain requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section XI, IWA-2430(d)(1) and IWB-2412, respectively, for the third 10-year interval of the inservice inspection program.

The NRC staff has reviewed the information provided in your application and determined that additional information is required in order to complete its formal review. The enclosed questions were provided to Mr. S. Wideman of your staff on July 24, 2014. Please provide a response to the enclosed questions within 30 days of the date of this letter.

If you have any questions, please contact me at 301-415-2296 or via e-mail at fred.lyon@nrc.gov.

Sincerely, Carl F. Lyon, Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-482 Enclosure Request for Additional Information cc w/encl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION REQUESTS FOR ALTERNATIVE 13R-08 AND 13R-09 TO ASME CODE REQUIREMENTS WOLF CREEK NUCLEAR OPERATING CORPORATION WOLF CREEK GENERATING STATION DOCKET NO. 50-482 By letter dated January 8, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14014A099), Wolf Creek Nuclear Operating Corporation (the licensee) submitted for the U.S. Nuclear Regulatory Commission (NRC) approval requests for alternative 13R-08 and 13R-09 for the Wolf Creek Generating Station. The licensee proposed alternatives to certain requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section XI, IWA-2430(d)(1) and IWB-2412, respectively, for the third 10-year interval of the inservice inspection program.

The NRC staff requests the following additional information in order to complete its review of the request.

EVIB-RAI-1 Table 2 of Attachment II (13R-09) lists the following information regarding past inspections:

Examinations for two 10-year inservice inspection intervals have been performed on the reactor vessel, closure head, inlet nozzle welds, and outlet nozzle welds, as summarized below.

Category B-A welds (reactor vessel): RF8 - Spring 1996 and RF14 - Spring 2005 with the exception of weld RV-1 01-121 (reactor vessel flange to shell weld) which was also examined in RF2 - Spring 1987 and RF1 0 - Spring 1999.

Category B-A welds (closure head): lnterval1 examinations in RF1 -Fall 1986, RF4 - Spring 1990, and RF6 - Spring 1993. Interval 2 examinations were performed in RF9- Fall1997, RF 11 - Fall2000, and RF13- Fall2003.

Category B-D welds (outlet nozzles): RF3- Fall1988, RF8- Spring 1996, RF14- Spring 2005 Category B-D welds (inlet nozzles): RF8 - Spring 1996, RF14 - Spring 2005 It appears that more than two inspections were done on some of the welds. Please clarify if any weld has been given more than the two required inspections. Explain why additional inspections, if any, were done.

Enclosure

August 1, 2014 Mr. Adam C. Heflin President, Chief Executive Officer, and Chief Nuclear Officer Wolf Creek Nuclear Operating Corporation Post Office Box 411 Burlington, KS 66839

SUBJECT:

WOLF CREEK GENERATING STATION- REQUEST FOR ADDITIONAL INFORMATION RE: REQUEST FOR ALTERNATIVE 13R-08 and 13R-09 (TAC NOS. MF3321 AND MF3322)

Dear Mr. Heflin:

By letter dated January 8, 2014, Wolf Creek Nuclear Operating Corporation (the licensee) submitted to the U.S. Nuclear Regulatory Commission (NRC) for approval requests for alternative 13R-08 and 13R-09 for the Wolf Creek Generating Station. The licensee proposed alternatives to certain requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section XI, IWA-2430(d)(1) and IWB-2412, respectively, for the third 10-year interval of the inservice inspection program.

The NRC staff has reviewed the information provided in your application and determined that additional information is required in order to complete its formal review. The enclosed questions were provided to Mr. S. Wideman of your staff on July 24, 2014. Please provide a response to the enclosed questions within 30 days of the date of this letter.

If you have any questions, please contact me at 301-415-2296 or via e-mail at fred.lyon@nrc.gov.

Sincerely, IRA/

Carl F. Lyon, Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-482 Enclosure Request for Additional Information cc w/encl: Distribution via Listserv DISTRIBUTION:

PUBLIC RidsNrrDeEvib Resource RidsNrrPMWolfCreek Resource LPL4-1 r/f RidsNrrDorllpl4-1 Resource RidsRgn4MaiiCenter Resource RidsAcrsAcnw_MaiiCTR Resource RidsNrrLAJBurkhardt Resource PPurtscher, NRR/DE/EVIB ADAMS A ccess1on No.: ML14206A012 ema1'I dae t d J UIY I 18 2014 OFFICE NRRIDORULPL4-1 /PM NRRIDORULPL4-1/LA NRRIDE/EVIB/BC* NRRIDORULPL4-1/BC (A) NRRIDORULPL4-1/PM NAME Flyon JBurkhardt SRosenberg EOesterle Flyon DATE 7/28/14 7/25/14 7/18/14 7/31/14 8/1/14 OFFICIAL RECORD COPY