ML072390513

Shearon Harris, Unit 1 - Response to Generic Letter 2006-02, Grid Reliability and the Impact on Plant Risk and the Operability of Offsite Power (TAC No. MD0986)

ML072390513
Person / Time
Site:	Harris
Issue date:	09/07/2007
From:	Vaaler M G NRC/NRR/ADRO/DORL/LPLII-2
To:	Duncan R J Carolina Power & Light Co
Vaaler, Marlayna, NRR/DORL 415-1998
References
GL-06-002, TAC MD0986
Download: ML072390513 (5)

Text

September 7, 2007Robert J. Duncan II, Vice PresidentShearon Harris Nuclear Power Plant Carolina Power & Light Company Post Office Box 165, Mail Code: Zone 1 New Hill, North Carolina 27562-0165

SUBJECT:

SHEARON HARRIS NUCLEAR POWER PLANT, UNIT 1 - RESPONSE TOGENERIC LETTER 2006-02, "GRID RELIABILITY AND THE IMPACT ON PLANT RISK AND THE OPERABILITY OF OFFSITE POWER" (TAC NO. MD0986)

Dear Mr. Duncan:

On February 1, 2006, the U.S. Nuclear Regulatory Commission (NRC) issued Generic Letter(GL) 2006-02, "Grid Reliability and the Impact on Plant Risk and the Operability of Offsite Power" (Agencywide Documents Access and Management System (ADAMS) Accession No. ML060180352), to all holders of operating licenses for nuclear power reactors except those who have permanently ceased operations and have certified that fuel has been removed from the reactor vessel.GL 2006-02 notified licensees of the NRC staff's need for information in four areas as follows:

(1) use of protocols between the nuclear power plant (NPP) and the transmission systemoperator (TSO), independent system operator (ISO), or reliability coordinator/authority (RC/RA) and the use of transmission load flow analysis tools (analysis tools) by TSOs to assist NPPs in monitoring grid conditions to determine the operability of offsite power systems under plant technical specifications (TSs). (The TSO, ISO, or RC/RA is responsible for preserving the reliability of the local transmission system. In this GL the term TSO is used to denote these entities);(2) use of NPP/TSO protocols and analysis tools by TSOs to assist NPPs in monitoring gridconditions for consideration in maintenance risk assessments;(3) offsite power restoration procedures in accordance with Section 2 of NRC RegulatoryGuide (RG) 1.155, "Station Blackout;" and(4) losses of offsite power caused by grid failures at a frequency equal to or greater thanonce in 20 site-years in accordance with RG 1.155.

R. Duncan- 2 -Subsequent to the GL, the NRC issued a request for additional information (RAI), (ADAMSAccession No. ML063380308) regarding the resolution of GL 2006-02 to 63 of 65 holders of operating licenses for nuclear power reactors. The RAI requested licensees respond to questions in the following areas:(1) Switchyard Minimum Voltage(2) Loss of Real-Time Contingency Analysis (RTCA) Capability (3) Verification of RTCA Predicted Post-Trip Voltage (4) Identification of Applicable Single Contingencies (5) Seasonal Variation in Grid Stress (reliability and Loss-of-offsite power (LOOP) Probability (6) Interface With Transmission System Operator During Extended Plant MaintenanceBy letters dated April 3, 2006 (ADAMS Accession No. ML061020109), and January 26, 2007(ADAMS Accession No. ML070320562), you responded to the information request of GL 2006-02 and the subsequent RAI. Based on the information you provided, the staff has concluded that compliance is being maintained with NRC regulatory requirements governing electric power sources and associated personnel training and considers your response to GL 2006-02 complete.If you have any questions, please contact me 301-415-3178.Sincerely,/RA/Marlayna Vaaler, Project ManagerPlant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket Nos. 50-400cc: See next page

ML061020109), and January 26, 2007(ADAMS Accession No. ML070320562), you responded to the information request of GL 2006-02 and the subsequent RAI. Based on the information you provided, the staff has concluded that compliance is being maintained with NRC regulatory requirements governing electric power sources and associated personnel training and considers your response to GL 2006-02 complete.If you have any questions, please contact me 301-415-3178.Sincerely,/RA/Marlayna Vaaler, Project ManagerPlant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket Nos. 50-400cc: See next page Distribution

PublicRidsNrrDorlLpl2-2(TBoyce)

LPL2-2 R/FRidsNrrPMMVaaler (hard copy)

JRobinson, NRRRidsNrrDprPgcb RidsAcrsAcnwMailCenterRidsNrrLACSola (hard copy)

RidsOgcRpRidsRgn2MailCenter(JMoorman)Accession Number: ML072390513NRR-106OFFICELPL2-2/PMLPL2-2/SR PMLPL2-2/LAEEEB/BCLPL2-2/BCNAMEMVaaler/kacSBaileyCSolaGWilsonTBoyceDATE 08/24/0708/31/0708/30/0709/07/0709/07/07 Shearon Harris Nuclear Power Plant, Unit 1 cc:David T. Conley Associate General Counsel II -

Legal Department Progress Energy Service Company, LLC Post Office Box 1551 Raleigh, North Carolina 27602-1551Resident Inspector/ Harris NPSc/o U. S. Nuclear Regulatory Commission 5421 Shearon Harris Road New Hill, North Carolina 27562-9998Ms. Margaret A. ForceAssistant Attorney General State of North Carolina Post Office Box 629 Raleigh, North Carolina 27602Public Service CommissionState of South Carolina Post Office Drawer 11649 Columbia, South Carolina 29211Ms. Beverly Hall, Section ChiefDivision of Radiation Protection N.C. Department of Environment and Natural Resources 3825 Barrett Drive Raleigh, North Carolina 27609-7721Mr. J. Paul FulfordManager, Performance Evaluation and Regulatory Affairs PEB 5 Carolina Power & Light Company Post Office Box 1551 Raleigh, North Carolina 27602-1551Mr. Chris L. BurtonDirector of Site Operations and Acting Plant General Manager Shearon Harris Nuclear Power Plant Carolina Power & Light Company Post Office Box 165, Mail Zone 1 New Hill, North Carolina 27562-0165Mr. Robert P. GruberExecutive Director Public Staff NCUC 4326 Mail Service Center Raleigh, North Carolina 27699-4326Chairman of the North Carolina Utilities Commission Post Office Box 29510 Raleigh, North Carolina 27626-0510Mr. Tony Gurley, ChairBoard of County Commissioners of Wake County P. O. Box 550 Raleigh, North Carolina 27602Mr. Carl Thompson, ChairBoard of County Commissioners of Chatham County P. O. Box 87 Pittsboro, North Carolina 27312Mr. Thomas J. Natale, ManagerSupport Services Shearon Harris Nuclear Power Plant Carolina Power & Light Company P. O. Box 165, Mail Zone 1 New Hill, North Carolina 27562-0165Mr. David H. Corlett, SupervisorLicensing/Regulatory Programs Shearon Harris Nuclear Power Plant Carolina Power & Light Company P. O. Box 165, Mail Zone 1 New Hill, NC 27562-0165Mr. John H. O'Neill, Jr.Pillsbury Winthrop Shaw Pittman, LLP 2300 N Street NW.

Washington, DC 20037-1128