ML071780545
| ML071780545 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 06/28/2007 |
| From: | Veronica Rodriguez NRC/NRR/ADRO/DLR/RLRB |
| To: | |
| rodriguez v m, ADRO/DLR/RLRB, 415-3703 | |
| References | |
| Download: ML071780545 (7) | |
Text
June 28, 2007LICENSEE:Wolf Creek Nuclear Operating CorporationFACILITY:Wolf Creek Generating Station, Unit 1
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON JUNE 21, 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 APPLICATIONThe U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Wolf CreekNuclear Operating Corporation held a telephone conference call on June 21, 2007, to discuss and clarify the staff's 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 staff's RAIs.Enclosure 1 provides a listing of the participants and Enclosure 2 contains a listing of the RAIsdiscussed 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 forthe 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 RegulationDocket No. 50-482
Enclosures:
- 1. List of Participants
- 2. List of Requests for Additional Informationcc w/encls: See next page
ML071780545OFFICEPM:RLRB:DLRLA:DLRBC:RLRB:DLRNAMEVRodríguezSFigueroaRAuluck DATE06/28/0706/28/0706/28/07 TELEPHONE CONFERENCE CALLWOLF CREEK GENERATING STATION, UNIT 1LICENSE RENEWAL APPLICATIONLIST OF PARTICIPANTSJUNE 21, 2007PARTICIPANTSAFFILIATIONSVeronica RodriguezU.S. Nuclear Regulatory Commission (NRC)William KooNRC Lorrie BellWolf Creek Nuclear Operating Corporation (WCNOC)
Don NaylorWCNOC Greg WhittierStrategic Teaming and Resource Sharing Alliance (STARS)
Rigel DavisSTARS Gordon ChenSTARS REQUESTS FOR ADDITIONAL INFORMATIONWOLF CREEK GENERATING STATION, UNIT 1LICENSE RENEWAL APPLICATIONJUNE 21, 2007The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Wolf CreekNuclear Operating Corporation held a telephone conference call on June 21, 2007, as a followup discussion and request for clarification to the applicant's response to the following requests for additional information (RAIs) concerning the Wolf Creek Generating Station (WCGS), Unit 1, license renewal application (LRA). The applicant's response to these RAIswas submitted by letter dated May 10, 2007. Nickel Alloy Aging Management ProgramRAI B.2.1.34-1 The Nickel Alloy Aging Management Program (AMP) was submitted prior to the performance ofpre-mitigation weld inspections for the application of weld overlays on pressurizer connections with dissimilar metal butt welds at WCGS. The pre-mitigation inspection performed in 2006 identified extensive circumferential cracking at three dissimilar metals welds associated with surge, relief, and safety nozzles. The staff requests that the applicant revise this AMP to incorporate information pertaining to the dissimilar metals butt weld inspection activities and findings. The revised AMP should: (1) discuss program enhancements incorporated as a result of the inspections, (2) provide information regarding the mitigation and preventive actions, taken or planned, to reduce the susceptibility of Alloy 600/82/182 components to primary water stress corrosion cracking (PWSCC), (3) discuss the inspection frequency and method of inspection of components susceptible to PWSCC covered under the scope of this program, and (4) provide justification that the AMP will provide reasonable assurance that PWSCC will be detected on a timely manner.In addition, the staff requests that the applicant update the AMP Updated Safety AnalysisReport (USAR) supplement to reflect all changes made to the program. Discussion: Based on the discussion with the applicant, the staff indicated that the responseto this RAI requires clarification. The staff informed the applicant that a revised Nickel AlloyAMP, and a revised Nickel Alloy USAR supplement must be submitted. The staff also noted that Commitment No. 19, item A, should include more detailed information specifying that WCGS will be participating in the industry initiatives such as the Westinghouse Owners Group and the Electric Power Research Institute's Material Reliability Program to ensure that the nickel alloy aging effects will be managed. In addition, the staff requested that the applicant identify all the components of weld locationsfor which the proactive approach will be applied. RAI B.2.1.34-3By letter dated October 12, 2005, the NRC staff provided comments and recommendations tothe Nuclear Energy Institute (NEI) pertaining to the guidance provided in MRP-139 for the inspection and evaluation of Alloy 82/182 butt welds. This initiative is continuing and a resolution has not been reached. The staff requests that the applicant identify any exceptions that WCGS plans to take to the NRC's comments and recommendations provided to the NEI.
If WCGS plans to take exceptions, the staff requests that the applicant provide its technical justification.Discussion: Based on the discussion with the applicant, the staff indicated that the responseto this RAI requires clarification. The staff requested that the applicant identify all the leakbefore break nickel alloy welds at WCGS. RAI B.2.1.34-6The LRA states that the reactor coolant system (RCS) pressure boundary, RCS non-pressureboundary, and ESF locations are included within the scope of this AMP. The staff requests that the applicant identify the components associated with these locations and its corresponding inspection plan. In addition, the staff requests that the applicant identify any Alloy 600/82/182 components not covered within the scope of this program and the reasons for their exclusion.Discussion: Based on the discussion with the applicant, the staff indicated that the responseto this RAI requires clarification. The staff requested that the applicant describe what kind ofexaminations will be performed at each component or weld location provided in the response.RAI B.2.1.34-9The corrective actions program element states that "Corrective actions may be used as trackingand documentation records for changes in plant thought processes and to identify potential improvement in programs from benchmarking activities." The staff requests that the applicant provide details and examples to clarify this statement.
Discussion: Based on the discussion with the applicant, the staff indicated that the responseto this RAI requires clarification. The staff requested that the applicant address the following:a) MRP-126 has not been approved by the staff; therefore, discuss how MRP-126 compares with the guidance currently recommended and endorsed by the NRC. Provide the complete title of MRP-126.
b)Discuss the condition report that documents the evaluation of ultrasonic testing indicationsfound on the pressurizer surge line nozzle. c)Describe the methodology and criteria used to apply the susceptibility ranking.
d)Provide and discuss WCAP 16228-P, Table 5-1. Provide the complete title ofWCAP 16228-P.e)Describe the monitoring and mitigating program for the components in the varioussusceptibility categories.
Memo to Wolf Creek Nuclear Operating Corporation from V. Rodriguez dated June 28, 2007DISTRIBUTION:
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON JUNE 21, 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 APPLICATIONHARD COPY DLR RF E-MAIL:PUBLICSSmith (srs3)
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CJacobs JDonohew GPick, RIV SCochrum, RIV CLong, RIV Wolf Creek Generating Station cc:Jay Silberg, Esq.Pillsbury Winthrop Shaw Pittman, LLP 2300 N Street, NW Washington, DC 20037Regional Administrator, Region IVU.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-7005Senior Resident InspectorU.S. Nuclear Regulatory Commission P.O. Box 311 Burlington, KS 66839Chief Engineer, Utilities DivisionKansas Corporation Commission 1500 SW Arrowhead Road Topeka, KS 66604-4027Office of the GovernorState of Kansas Topeka, KS 66612Attorney General120 S.W. 10 th Avenue, 2 nd FloorTopeka, KS 66612-1597County ClerkCoffey County Courthouse 110 South 6 th StreetBurlington, KS 66839Thomas A. Conley, Section ChiefRadiation and Asbestos Control Kansas Department of Health and Environment Bureau of Air and Radiation 1000 SW Jackson, Suite 310 Topeka, KS 66612-1366Vice President Operations/Plant ManagerWolf Creek Nuclear Operating Corporation P.O. Box 411 Burlington, KS 66839Supervisor LicensingWolf Creek Nuclear Operating Corporation P.O. Box 411 Burlington, KS 66839U.S. Nuclear Regulatory CommissionResident Inspectors Office/Callaway Plant
8201 NRC Road Steedman, MO 65077-1032Kevin J. Moles, ManagerRegulatory Affairs Wolf Creek Nuclear Operating Corporation P.O. Box 411 Burlington, KS 66839Lorrie I. Bell, Project ManagerWolf Creek Nuclear Operating Corporation P.O. Box 411 Burlington, KS 66839Mr. Gordon A. CleftonNuclear Energy Institute 1776 I Street, NW, Suite 400 Washington, DC 20006-3708