ML071370638

Response to Generic Letter 2006-02 Grid Reliability and the Impact on Plant Risk and the Operability of Offsite Power

ML071370638
Person / Time
Site:	Seabrook
Issue date:	06/06/2007
From:	Miller G E NRC/NRR/ADRO/DORL/LPLI-2
To:	St.Pierre G F Florida Power & Light Energy Seabrook
Miller G, NRR/DORL, 415-2481
References
GL-06-002, TAC MD1032
Download: ML071370638 (5)

Text

June 6, 2007Mr. Gene F. St. Pierre, Site Vice Presidentc/o James M. Peschel Seabrook Station P. O. Box 300 Seabrook, NH 03874

SUBJECT:

SEABROOK STATION, UNIT NO. 1 - RESPONSE TO GENERIC LETTER 2006-02"GRID RELIABILITY AND THE IMPACT ON PLANT RISK AND THE OPERABILITY OFOFFSITE POWER" (TAC NO. MD1032)

Dear Mr. St. Pierre:

On February 1, 2006, the U.S. Nuclear Regulatory Commission (NRC) issued GL 2006-02,"Grid Reliability and the Impact on Plant Risk and the Operability of Offsite Power" (Agencywide Document Access and Management System (ADAMS) Accession No.

ML060180352), to all holders of operating licenses for nuclear power reactors except those who have permanently ceased operation 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.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, G. St. Pierre- 2 -(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 Maintenance.By letters dated April 3, 2006 (ADAMS Accession No.ML060950462), and January 31, 2007(ADAMS Accession No.ML070430281), 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 301-415-2481Sincerely,/ra/G. Edward Miller, Project ManagerPlant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket No. 50-443 cc: See next page

ML060950462), and January 31, 2007(ADAMS Accession No.ML070430281), 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 301-415-2481Sincerely,/ra/G. Edward Miller, Project ManagerPlant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket No. 50-443 cc: See next pageDISTRIBUTIONPUBLICGWilson, NRRRidsRgn1MailCenter(GMatakas)LPL1-2R/FRidsNrrRMGMillerRidsNrrDorlLplI-2(HChernoff)

RidsOgcRpRidsNrrLAMOBrienCJackson, NRR RidsNrrDorlDprMMcConnell, NRRRidsAcrsAcnwMailCenterAccession Number: ML071370638OFFICELPL1-2/PMLPL1-2/LADE/EEEB/BCLPL1-2/BCNAMEGEMillerMO'BrienGWilsonHChernoffDATE5/22/075/30/076/6/076/6/07 Seabrook Station, Unit No. 1 cc:

Mr. J. A. StallSenior Vice President, Nuclear and Chief Nuclear Officer Florida Power & Light Company P.O. Box 14000 Juno Beach, FL 33408-0420Mr. Peter BrannAssistant Attorney General State House, Station #6 Augusta, ME 04333Resident InspectorU.S. Nuclear Regulatory Commission Seabrook Nuclear Power Station P.O. Box 1149 Seabrook, NH 03874Town of Exeter10 Front Street Exeter, NH 03823Regional Administrator, Region IU.S. Nuclear Regulatory Commission

475 Allendale Road King of Prussia, PA 19406Office of the Attorney GeneralOne Ashburton Place, 20th Floor Boston, MA 02108Board of SelectmenTown of Amesbury Town Hall Amesbury, MA 01913Mr. Robert PooleFederal Emergency Management Agency Region I 99 High Street, 6 th FloorBoston, MA 02110Mr. Tom CrimminsPolestar Applied Technology One First Street, Suite 4 Los Altos, CA 94019John GiarrussoMassachusetts Emergency ManagementAgency400 Worcester Road Framingham, MA 01702-5399Ms. Kelly Ayotte, Attorney GeneralMr. Orvil Fitch, Deputy Attorney General 33 Capitol Street Concord, NH 03301Mr. Christopher M. Pope, DirectorHomeland Security & Emergency Mgmt.

New Hampshire Department of Safety Bureau of Emergency Management 33 Hazen Drive Concord, NH 03301Mr. M. S. Ross, Managing AttorneyFlorida Power & Light Company P.O. Box 14000 Juno Beach, FL 33408-0420Mr. Rajiv S. KundalkarVice President - Nuclear Engineering Florida Power & Light Company P.O. Box 14000 Juno Beach, FL 33408-0420James M. PeschelRegulatory Programs Manager FPL Energy Seabrook, LLC PO Box 300 Seabrook, NH 03874Ms. Marjan MashhadiSenior Attorney Florida Power & Light Company 801 Pennsylvania Ave., NW Suite 220 Washington, DC 20004 Seabrook Station, Unit No. 1 cc:

Mr. Mark E. WarnerVice President, Nuclear Operations Support Florida Power & Light Company P.O. Box 14000 Juno Beach, FL 33408-0420