ML062410484
| ML062410484 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek, Callaway  |
| Issue date: | 09/20/2006 |
| From: | Donohew J N NRC/NRR/ADRO/DORL/LPLIV |
| To: | Union Electric Co, Wolf Creek |
| Donohew J N, NRR/DORL, 415-1307 | |
| Shared Package | |
| ML062410381 | List: |
| References | |
| Download: ML062410484 (6) | |
Text
September 20, 2006LICENSEES:Union Electric Company (UECo)Wolf Creek Nuclear Operating Corporation (WCNOC)FACILITIES:Callaway Plant, Unit 1Wolf Creek Generating Station
SUBJECT:
SUMMARY
OF AUGUST 16, 2006, MEETING WITH REPRESENTATIVES OFWOLF CREEK NUCLEAR OPERATING CORPORATION AND UNIONELECTRIC COMPANYA meeting was held on Wednesday, August 16, 2006, between the Nuclear RegulatoryCommission (NRC) staff and the licensees for the Callaway Plant, Unit 1 (Callaway) and WolfCreek Generating Station (Wolf Creek). The meeting was held at the request of the licenseesfor them to present the design of the main steam isolation valves (MSIVs) at their plants, andthe requirements in the plant Technical Specifications (TSs) on these valves. This presentationwas not part of any license amendment request submitted by the licensees to the NRC. Thenotice for the meeting was issued on August 4, 2006.Enclosure 1 is the list of attendees. Enclosure 2 is the meeting handout provided by thelicensees; there was no handout from the NRC staff.Each plant has four steam generators (SGs) with a main steam line from each SG to the steamline header that provides steam to the single high-pressure steam turbine. Each of these main steam lines has a single MSIV to isolate, if needed during an accident, the steam turbine from the SG. Therefore, each plant has four MSIVs. Each MSIV has two actuator trains, each of which can close the valve. Each actuator train alone is capable of closing the valve within the time frame needed for the design-basis accidents. The MSIVs are addressed in TS 3.7.2, "Main Steam Isolation Valves," for both plants.The NRC staff is in the process of making a determination as to the effect of a single inoperable actuator train on the operability, with respect to the TSs, of the associated MSIV. The licensees' presentations provided information germane to this determination.The following agenda was presented by WCNOC during the first part of the meeting:
- Introductions (page 1 of Enclosure 2)*Purpose of Meeting (page 2)
- MSIV/Main feedwater isolation valves (MFIS) Description and Operation (pages 3 through 8)*Design Bases (pages 9 and 10)
- Safety Analyses (pages 11 through 17)
- TSs (pages 18 through 22)
- Conclusion (pages 23 and 24) WCNOC addressed both MSIVs and MFIVs because at Wolf Creek Generating Station thesevalves have two actuator trains, each of which can close the valves. In its presentation on the design bases and safety analyses of the MSIVs, WCNOC stated that (1) the design bases for the MSIVs are that no single failure can prevent any MSIV from performing its required function and (2) the safety function for the MSIVs is to close in an accident within the 5 seconds required by the accident analyses. The Wolf Creek MSIV accident analyses are different from those of Callaway in that only three of the four MSIVs are required to close for Wolf Creek, whereas all the MSIVs are required to close for Callaway.Following WCNOC's presentation, UECo presented the information provided in its handout,which is the last four pages of Enclosure 2.UECo's presentation addressed the following: (1) the licensee's initial efforts to address theMSIV actuator inoperability, (2) the licensee's TS interpretation, (3) MSIV actuator operabilityissue identified in 2005, and (4) subsequent development and current status of this issue.The NRC staff discussed with the licensees the MSIV design at both plants, the rules andpractices of the TSs, and how the existing TS 3.4.15 should be interpreted with respect to the actuator trains on these valves.The NRC staff did not draw any conclusions about the operability of an MSIV with respect toone of the two actuator trains being out-of-service. The NRC staff completed its discussion ofthe licensees' presentations, and the meeting was closed.Please direct any inquiries to me at 301-415-1307, or JND@nrc.gov
./RA/Jack Donohew, Senior Project ManagerPlant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket Nos: 50-482 and 50-483
Enclosures:
- 1. List of Meeting Attendees 2. Licensees' Handoutcc w/encls: See next page WCNOC addressed both MSIVs and MFIVs because at Wolf Creek Generating Station thesevalves have two actuator trains, each of which can close the valves. In its presentation on the design bases and safety analyses of the MSIVs, WCNOC stated that (1) the design bases for the MSIVs are that no single failure can prevent any MSIV from performing its required function and (2) the safety function for the MSIVs is to close in an accident within the 5 seconds required by the accident analyses. The Wolf Creek MSIV accident analyses are different from those of Callaway in that only three of the four MSIVs are required to close for Wolf Creek, whereas all the MSIVs are required to close for Callaway.Following WCNOC's presentation, UECo presented the information provided in its handout,which is the last four pages of Enclosure 2.UECo's presentation addressed the following: (1) the licensee's initial efforts to address theMSIV actuator inoperability, (2) the licensee's TS interpretation, (3) MSIV actuator operabilityissue identified in 2005, and (4) subsequent development and current status of this issue.The NRC staff discussed with the licensees the MSIV design at both plants, the rules andpractices of the TSs, and how the existing TS 3.4.15 should be interpreted with respect to the actuator trains on these valves.The NRC staff did not draw any conclusions about the operability of an MSIV with respect toone of the two actuator trains being out-of-service. The NRC staff completed its discussion ofthe licensees' presentations, and the meeting was closed.Please direct any inquiries to me at 301-415-1307, or JND@nrc.gov
./RA/Jack Donohew, Senior Project ManagerPlant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket Nos: 50-482 and 50-483
Enclosures:
- 1. List of Meeting Attendees 2. Licensees' Handoutcc w/encls: See next pageDISTRIBUTION
- PUBLICCSchulten, ITSBJLamb, RIV EDO LPLIV ReadingTKobetz, ITSB RidsNrrDorl (CHaney/CHolden)MZobler, OGC RidsNrrDorlLpl4 (DTerao)WJones, RIV RidsNrrPMJDonohewRidsAcrsAcnwMailCenterRidsNrrLAMLFeizollahiRidsOgcRpPackage No.: ML062410381ADAMS ACCESSION NO. ML062410484Meeting Handouts: ML 062280437OFFICELPLIV/PMLPLIV/LAITSB/SCLPLIV/BCNAMEJDonohewLFeizollahiTKobetzDTerao DATE9/18/069/20/069/19/069/20/06OFFICIAL RECORD COPY LIST OF ATTENDEES AT MEETING OF AUGUST 16, 2006WITH REPRESENTATIVES OF UNION ELECTRIC COMPANY ANDWOLF CREEK NUCLEAR OPERATING CORPORATION NAMEAFFILIATIONJ. DonohewNRC/NRR/LPLIVD. TeraoNRC/NRR/LPIV T. KobetzNRC/NRR/ITSBC. SchultenNRC/NRR/ITSB M. ZoblerNRC/OGC W. JonesNRC/RIVS. WidemanWCNOC T. GarrettWCONC F. LaflinWCNOC G. ClarksonWCNOC D. ShaferUEC T. ElwoodUEC M. ReidmeyerUEC E. HiruoPlatts Nuclear PublicationsWhere:ITSB= Technical Specification BranchLPLIV= Plant Licensing Branch IV NRC= Nuclear Regulatory Commission NRR= Office of Nuclear Reactor Regulation OGC= Office of the General Counsel RIV= Region IV UECo= Union Electric Company WCNOC= Wolf Creek Nuclear Operating CorporationEnclosure 1 LICENSEES' HANDOUT FOR AUGUST 16, 2006, MEETINGThe licensees' handout (ADAMS* Accession No. ML062280437) consists of the following:1.Handout (24 pages) by Wolf Creek Nuclear Operating Corporation (WCNOC) 2.Handout (4 pages) by Union Electric Company (UECo)*= Agencywide Documents Access and Management SystemEnclosure 2 Callaway Plant, Unit 1 cc:Professional Nuclear Consulting, Inc.
19041 Raines Drive Derwood, MD 20855John O'Neill, Esq.Pillsbury Winthrop Shaw Pittman LLP 2300 N. Street, N.W.
Washington, D.C. 20037Mr. Keith A. Mills, Supervising EngineerRegional Regulatory Affairs/Safety Analysis AmerenUE P.O. Box 620 Fulton, MO 65251U.S. Nuclear Regulatory CommissionResident Inspector Office
8201 NRC RoadSteedman, MO 65077-1302Mr. Les H. KanuckelManager, Quality Assurance AmerenUE P.O. Box 620 Fulton, MO 65251Missouri Public Service CommissionGovernor Office Building 200 Madison Street Jefferson City, MO 65102-0360Regional Administrator, Region IVU.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-4005Mr. H. Floyd GilzowDeputy Director for Policy Missouri Department of Natural Resources
P. O. Box 176 Jefferson City, MO 65102-0176Mr. Rick A. MuenchPresident and Chief Executive Officer Wolf Creek Nuclear Operating Corporation
P.O. Box 411 Burlington, KA 66839Mr. Dan I. Bolef, PresidentKay Drey, Representative Board of Directors Coalition for the Environment 6267 Delmar Boulevard University City, MO 63130Mr. Lee Fritz, Presiding CommissionerCallaway County Court House 10 East Fifth Street Fulton, MO 65151Mr. David E. Shafer Superintendent, Licensing Regulatory Affairs AmerenUE P.O. Box 66149, MC 470 St. Louis, MO 63166-6149Mr. Keith D. YoungManager, Regulatory Affairs AmerenUE P.O. Box 620 Fulton, MO 65251Mr. Keith G. Henke, PlannerDivision of Community and Public Health Office of Emergency Coordination 930 Wildwood P.O. Box 570 Jefferson City, MO 65102Certrec Corporation4200 South Hulen, Suite 630 Fort Worth, TX 76109Director, Missouri State Emergency Management Agency
P.O. Box 116 Jefferson City, MO 65102-0116Mr. Charles D. NaslundSenior Vice President and Chief Nuclear Officer Union Electric Company Post Office Box 620 Fulton, MO 65251 February 2006Wolf Creek Generating Station cc:Jay Silberg, Esq.
Pillsbury Winthrop Shaw Pittman LLP 2300 N Street, NW Washington, D.C. 20037Regional Administrator, Region IVU.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011Senior 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 66839Chief, Radiation and Asbestos Control Section Kansas Department of Health and Environment Bureau of Air and Radiation 1000 SW Jackson, Suite 310Topeka, 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 RoadSteedman, MO 65077-1032Mr. Rick A. MuenchPresident and Chief Executive Officer Wolf Creek Nuclear Operating Corporation Post Office Box 411 Burlington, KS 66839