ML061160141

05/11/2006 Notice of Meeting with Arizona Public Service Company Regarding Palo Verde Nuclear Generating Station, Unit 1 Shutdown Cooling Line Vibration Issue

ML061160141
Person / Time
Site:	Palo Verde
Issue date:	05/01/2006
From:	Fields M Plant Licensing Branch III-2
To:	Terao D Plant Licensing Branch III-2
Fields M , NRR/ADPT,415-3062
References
Download: ML061160141 (5)

Text

May 1, 2006MEMORANDUM TO:David Terao, Branch ChiefPlant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationFROM:Mel B. Fields, Senior Project Manager/RA/Plant Licensing Branch IVDivision of Operating Reactor Licensing Office of Nuclear Reactor Regulation

SUBJECT:

FORTHCOMING MEETING WITH ARIZONA PUBLIC SERVICECOMPANY REGARDING PALO VERDE NUCLEAR GENERATING STATION, UNIT 1 SHUTDOWN COOLING LINE VIBRATION ISSUEDATE & TIME:Thursday, May 11, 20068:00 a.m. - 12:00 noonLOCATION:U.S. Nuclear Regulatory Commission (NRC)Two White Flint North 11555 Rockville Pike, Room O 3 B-4Rockville, Maryl and 20852PURPOSE:To discuss the higher-than-normal vibration levels observed in theTrain A shutdown cooling line and valve SI-651, and Arizona Public Service Company's plans for resolving this issue (see attached agenda).CATEGORY: *This is a Category 1 Meeting. The public is invited to observe thismeeting and will have one or more opportunities to communicate with theNRC after the business portion, but before the meeting is adjour ned.PARTICIPANTS:Participants from the NRC include members of the Office of NuclearReactor Regulation.

NRCArizona Public Service CompanyK. ManolyCarl ChurchmanD. TeraoScott Bauer M. Fields, et al.Mo KarbassianWinston Borrero Jeff Brown Docket No. STN 50-528

Enclosure:

Agenda cc w/encl: See next page MEETING CONTACT:Mel B. Fields, NRR301-415-3062 mbf1@nrc.gov

• Commission's Policy Statement on "Enhancing Public Participation in NRC Meetings," (67 FR 36920), May 28, 2002 May 1, 2006MEMORANDUM TO:David Terao, Branch ChiefPlant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationFROM:Mel B. Fields, Senior Project Manager/RA/Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation

SUBJECT:

FORTHCOMING MEETING WITH ARIZONA PUBLIC SERVICECOMPANY REGARDING PALO VERDE NUCLEAR GENERATING STATION, UNIT 1 SHUTDOWN COOLING LINE VIBRATION ISSUEDATE & TIME:Thursday, May 11, 20068:00 a.m. - 12:00 noonLOCATION:U.S. Nuclear Regulatory Commission (NRC)Two White Flint North 11555 Rockville Pike, Room O 3 B-4Rockville, Maryl and 20852PURPOSE:To discuss the higher-than-normal vibration levels observed in theTrain A shutdown cooling line and valve SI-651, and Arizona Public Service Company's plans for resolving this issue (see attached agenda).CATEGORY: *This is a Category 1 Meeting. The public is invited to observe thismeeting and will have one or more opportunities to communicate with theNRC after the business portion, but before the meeting is adjour ned.PARTICIPANTS:Participants from the NRC include members of the Office of NuclearReactor Regulation.

NRCArizona Public Service CompanyK. ManolyCarl ChurchmanD. TeraoScott Bauer M. Fields, et al.Mo KarbassianWinston Borrero Jeff Brown Docket No. STN 50-528

Enclosure:

Agenda cc w/encl: See next page MEETING CONTACT:Mel B. Fields, NRR301-415-3062 mbf1@nrc.gov

• Commission's Policy Statement on "Enhancing Public Participation in NRC Meetings," (67 FR 36920), May 28, 2002 DISTRIBUTION

PublicRidsNrrPMMFields RidsNrrDorlLPL4 r/fRidsNrrLADJohnsonRidsRgn4MailCenter(TPruett)RidsOgcMailCenterRidsNrrAdro RidsNrrAdro (CDorsey)TBloomer, EDO RIVRidsAcrsAcnwMailCenterRidsNrrDorlLplg RidsOpaMailPMNSKManoly Receptionist (OWFN and TWFN) (Hard Copy)VDricks, OPA RIVRJasinski, NRRAccession Number: NRC-001OFFICENRR/LPL4/PMNRR/LPL4/LANRR/LPL4/BCNAMEMFields DJohnsonDTerao DATE5/1/065/1/065/1/06OFFICIAL RECORD COPY AGENDAMEETING WITH ARIZONA PUBLIC SERVICE COMPANY SHUTDOWN COOLING LINE VIBRATION ISSUEPALO VERDE NUCLEAR GENERATING STATION, UNIT 1 MAY 11, 2006BackgroundDuring power ascension of Palo Verde Nuclear Generating Station (Palo Verde), Unit 1 inDecember 2005 following a refueling outage in which the steam generators were replaced, the vibration level of the Train A shutdown cooling (SDC) line and valve SI-651 was found to reach approximately two inches per second (ips) at approximately 32% rated thermal power. In order to prevent exceeding the SDC line vibration administrative limit of 2.0 ips and design limit of 2.25 ips, power ascension was stopped. Since that time, Unit 1 reactor power was limited to keep the SDC line vibration within the administrative limit. The SDC line vibration is hypothesized by Arizona Public Service Company to be the result of a flow-induced excitation of the fundamental acoustic frequency of the SDC suction line. The system is believed to beexcited by a pressure disturbance originating at the suction line nozzle resulting from a coupled interaction between instabilities within the flow shear layer over the nozzle and the refractedstanding wave in the line. Palo Verde is currently defueled and undergoing repair activities to correct the vibration problem.

Introductions 8:00 a.m.History of SI-651 Vibration Issue Proposed Modifications Final Corrective Action Closing Remarks Public Comment/Questions Adjourn12:00 noon Palo Verde Generating Station, Unit 1 cc:March 2006Mr. Steve OleaArizona Corporation Commission 1200 W. Washington Street Phoenix, AZ 85007Mr. Douglas Kent PorterSenior Counsel Southern California Edison Company Law Department, Generation Resources

P.O. Box 800 Rosemead, CA 91770Senior Resident InspectorU.S. Nuclear Regulatory Commission

P. O. Box 40 Buckeye, AZ 85326Regional Administrator, Region IVU.S. Nuclear Regulatory Commission Harris Tower & Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064ChairmanMaricopa County Board of Supervisors 301 W. Jefferson, 10th Floor Phoenix, AZ 85003Mr. Aubrey V. Godwin, DirectorArizona Radiation Regulatory Agency 4814 South 40 Street Phoenix, AZ 85040Mr. Craig K. Seaman, General ManagerRegulatory Affairs and Performance Improvement Palo Verde Nuclear Generating Station Mail Station 7636 P.O. Box 52034 Phoenix, AZ 85072-2034Mr. Hector R. PuenteVice President, Power Generation El Paso Electric Company 310 E. Palm Lane, Suite 310 Phoenix, AZ 85004Mr. John TaylorPublic Service Company of New Mexico 2401 Aztec NE, MS Z110 Albuquerque, NM 87107-4224Mr. Thomas D. ChampSouthern California Edison Company 5000 Pacific Coast Hwy Bldg D1B San Clemente, CA 92672Mr. Robert HenrySalt River Project 6504 East Thomas Road Scottsdale, AZ 85251Mr. Jeffrey T. WeikertAssistant General Counsel El Paso Electric Company Mail Location 167 123 W. M illsEl Paso, TX 79901Mr. John SchumannLos Angeles Department of Water & Power Southern California Public Power Authority P.O. Box 51111, Room 1255-C Los Angeles, CA 90051-0100Mr. Brian AlmonPublic Utility Commission William B. Travis Building P. O. Box 13326 1701 North Congress Avenue Austin, TX 78701-3326 Palo Verde Generating Station, Unit 1 cc:March 2006Ms. Karen O'ReganEnvironmental Program Manager City of Phoenix Office of Environmental Programs 200 West Washington Street Phoenix AZ 85003 Mr. Matthew BenacAssistant Vice President Nuclear & Generation Services El Paso Electric Company 340 East Palm Lane, Suite 310 Phoenix, AZ 85004