ML072400351

H.B. Robinson, Unit 2 - Response to Generic Letter 2006-02, Grid Reliability and the Impact on Plant Risk and the Operability of Offsite Power (TAC No. MD1025)

ML072400351
Person / Time
Site:	Robinson
Issue date:	09/07/2007
From:	Vaaler M G NRC/NRR/ADRO/DORL/LPLII-2
To:	Walt T D Carolina Power & Light Co
Vaaler, Marlayna, NRR/DORL 415-1998
References
GL-06-002, TAC MD1025
Download: ML072400351 (5)

Text

September 7, 2007Mr. Thomas D. Walt, Vice PresidentH. B. Robinson Steam Electric Plant, Unit No. 2 Carolina Power & Light Company 3581 West Entrance Road Hartsville, South Carolina 29550-0790

SUBJECT:

H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 - RESPONSE TOGENERIC LETTER 2006-02, "GRID RELIABILITY AND THE IMPACT ON PLANT RISK AND THE OPERABILITY OF OFFSITE POWER" (TAC NO. MD1025)

Dear Mr. Walt:

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.

T. Walt- 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. ML060950359), and January 31, 2007(ADAMS Accession No. ML070330593), 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. 50-261cc: See next page

ML060950359), and January 31, 2007(ADAMS Accession No. ML070330593), 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 RegulationDistribution

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RidsOgcRpRidsRgn2MailCenter(JMoorman)Accession Number: ML072400351NRR-106OFFICELPL2-2/PMLPL2-2/SR PMLPL2-2/LAEEEB/BCLPL2-2/BCNAMEMVaalerCSolaGWilsonTBoyceDATE08/30/0708/30/0708/30/0709/07/0709/07/07 H. B. Robinson Steam Electric Plant, Unit No. 2 cc:

David T. ConleyAssociate General Counsel II - Legal Department Progress Energy Service Company, LLC Post Office Box 1551 Raleigh, North Carolina 27602-1551Ms. Margaret A. ForceAssistant Attorney General State of North Carolina Post Office Box 629 Raleigh, North Carolina 27602U. S. Nuclear Regulatory CommissionResident Inspector's Office H. B. Robinson Steam Electric Plant 2112 Old Camden Road Hartsville, South Carolina 29550Mr. Ernest J. Kapopoulos, Jr.Plant General Manager H. B. Robinson Steam Electric Plant, Unit No. 2 Carolina Power & Light Company 3581 West Entrance Road Hartsville, South Carolina 29550Director of Site OperationsH. B. Robinson Steam Electric Plant, Unit No. 2 Carolina Power & Light Company 3581 West Entrance Road Hartsville, South Carolina 29550Public Service CommissionState of South Carolina Post Office Drawer 11649 Columbia, South Carolina 29211Ms. J. F. LucasManager - Support Services - Nuclear H. B. Robinson Steam Electric Plant, Unit No. 2 Carolina Power & Light Company 3581 West Entrance Road Hartsville, South Carolina 29550Mr. C. T. BaucomSupervisor, Licensing/Regulatory Programs H. B. Robinson Steam Electric Plant, Unit No. 2 Carolina Power & Light Company 3581 West Entrance Road Hartsville, South Carolina 29550Ms. Beverly Hall, Section ChiefN.C. Department of Environment and Natural Resources Division of Radiation Protection 3825 Barrett Dr.

Raleigh, North Carolina 27609-7721Mr. Robert P. GruberExecutive Director Public Staff - NCUC 4326 Mail Service Center Raleigh, North Carolina 27699-4326Mr. Henry H. Porter, Assistant DirectorSouth Carolina Department of Health Bureau of Land & Waste Management 2600 Bull Street Columbia, South Carolina 29201Mr. J. Paul FulfordManager, Performance Evaluation and Regulatory Affairs PEB 5 Carolina Power & Light Company Post Office Box 1551 Raleigh, North Carolina 27602-1551Mr. John H. O'Neill, Jr.Pillsbury Winthrop Shaw Pittman, LLP 2300 N Street NW.

Washington, DC 20037-1128