ML071580124

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

ML071580124
Person / Time
Site:	Brunswick
Issue date:	06/15/2007
From:	Stewart Bailey NRC/NRR/ADRO/DORL/LPLII-2
To:	Scarola J Carolina Power & Light Co
Bailey S , NRR/ADRO/DORL, 415-1321
References
GL-06-002, TAC MD0956, TAC MD0957
Download: ML071580124 (5)

Text

June 15, 2007 Mr. James Scarola, Vice President Brunswick Steam Electric Plant Carolina Power & Light Company Post Office Box 10429 Southport, North Carolina 28461

SUBJECT:

BRUNSWICK STEAM ELECTRIC PLANT, UNIT NOS. 1 AND 2, RESPONSE TO GENERIC LETTER 2006-02 GRID RELIABILITY AND THE IMPACT ON PLANT RISK AND THE OPERABILITY OF OFFSITE POWER (TAC NOS. MD0956 AND MD0957)

Dear Mr. Scarola:

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 Document Access and Management System 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 staffs need for information in four areas as follows:

(1) use of protocols between the nuclear power plant (NPP) and the transmission system operator (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 grid conditions for consideration in maintenance risk assessments; (3) offsite power restoration procedures in accordance with Section 2 of NRC Regulatory Guide (RG) 1.155, Station Blackout; and (4) losses of offsite power caused by grid failures at a frequency equal to or greater than once in 20-site-years in accordance with RG 1.155.

Subsequent to the GL, the NRC issued a request for additional information (RAI)

(ML063380308) regarding the resolution of GL 2006-02 to 63 of 65 holders of NPP operating licenses. The RAI requested responses to questions in the following areas:

Mr. Scarola (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 Probability); and (6) Interface with Transmission System Operator During Extended Plant Maintenance.

By letters dated March 31, 2006 (ML061020057), and January 25, 2007 (ML070310316), you responded to the information request of GL 2006-02 and the subsequent RAI, respectively.

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. The staff considers your response to GL 2006-02 complete.

Please contact me at 301-415-1321 if you have any questions on this issue.

Sincerely,

/RA/

Stewart N. Bailey, Senior Project Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-325 and 50-324 cc: See next page

ML071580124 NRR-106 OFFICE LPLI-2/PM LPLI-2/LA EEEB/BC LPLI-2/BC NAME SBailey BClayton GWilson TBoyce DATE 06/14/07 06/13/07 06/13/07 06/15/07 Mr. Scarola Mr. James Scarola Brunswick Steam Electric Plant Carolina Power & Light Company Units 1 and 2 cc:

David T. Conley Executive Director Associate General Counsel II - Public Staff - NCUC Legal Department 4326 Mail Service Center Progress Energy Service Company, LLC Raleigh, North Carolina 27699-4326 Post Office Box 1551 Raleigh, North Carolina 27602-1551 Ben Waldrep Director, Site Operations Mr. David R. Sandifer, Chairperson Brunswick Steam Electric Plant Brunswick County Board of Commissioners Carolina Power & Light Company Post Office Box 249 Post Office Box 10429 Bolivia, North Carolina 28422 Southport, North Carolina 28461-0429 Resident Inspector Mr. Norman R. Holden, Mayor U. S. Nuclear Regulatory Commission City of Southport 8470 River Road 201 East Moore Street Southport, North Carolina 28461 Southport, North Carolina 28461 Mr. John H. ONeill, Jr. Mr. Warren Lee Pillsbury Winthrop Shaw Pittman, LLP Emergency Management Director 2300 N Street NW. New Hanover County Department of Washington, DC 20037-1128 Emergency Management Post Office Box 1525 Ms. Beverly Hall, Section Chief Wilmington, North Carolina 28402-1525 Division of Radiation Protection N.C. Department of Environment Mr. J. Paul Fulford and Natural Resources Manager, Performance Evaluation and 3825 Barrett Dr. Regulatory Affairs PEB5 Raleigh, North Carolina 27609-7721 Carolina Power & Light Company Post Office Box 1551 Mr. Terry D. Hobbs Raleigh, North Carolina 27602-1551 Plant General Manager Brunswick Steam Electric Plant Mr. Randy C. Ivey Carolina Power & Light Company Manager - Support Services Post Office Box 10429 Brunswick Steam Electric Plant Southport, North Carolina 28461-0429 Carolina Power & Light Company Post Office Box 10429 Public Service Commission Southport, North Carolina 28461 State of South Carolina Post Office Drawer 11649 Columbia, South Carolina 29211 Ms. Margaret A. Force Assistant Attorney General State of North Carolina Post Office Box 629 Raleigh, North Carolina 27602 Mr. Robert P. Gruber