ML072400351

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

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

Text

September 7, 2007 Mr. Thomas D. Walt, Vice President H. 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 TO GENERIC 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 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.

T. Walt Subsequent to the GL, the NRC issued a request for additional information (RAI), (ADAMS Accession 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 Maintenance By 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 Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-261 cc: 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 Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Distribution:

Public RidsNrrDorlLpl2-2(TBoyce)

LPL2-2 R/F RidsNrrPMMVaaler (hard copy)

JRobinson, NRR RidsNrrDprPgcb RidsAcrsAcnwMailCenter RidsNrrLACSola (hard copy)

RidsOgcRp RidsRgn2MailCenter(JMoorman)

Accession Number: ML072400351 NRR-106 OFFICE LPL2-2/PM LPL2-2/SR PM LPL2-2/LA EEEB/BC LPL2-2/BC NAME MVaaler CSola GWilson TBoyce DATE 08/30/07 08/30/07 08/30/07 09/07/07 09/07/07

H. B. Robinson Steam Electric Plant, Unit No. 2 cc:

David T. Conley Mr. C. T. Baucom Associate General Counsel II - Legal Supervisor, Licensing/Regulatory Programs Department H. B. Robinson Steam Electric Plant, Progress Energy Service Company, LLC Unit No. 2 Post Office Box 1551 Carolina Power & Light Company Raleigh, North Carolina 27602-1551 3581 West Entrance Road Hartsville, South Carolina 29550 Ms. Margaret A. Force Assistant Attorney General Ms. Beverly Hall, Section Chief State of North Carolina N.C. Department of Environment Post Office Box 629 and Natural Resources Raleigh, North Carolina 27602 Division of Radiation Protection 3825 Barrett Dr.

U. S. Nuclear Regulatory Commission Raleigh, North Carolina 27609-7721 Resident Inspectors Office H. B. Robinson Steam Electric Plant Mr. Robert P. Gruber 2112 Old Camden Road Executive Director Hartsville, South Carolina 29550 Public Staff - NCUC 4326 Mail Service Center Mr. Ernest J. Kapopoulos, Jr. Raleigh, North Carolina 27699-4326 Plant General Manager H. B. Robinson Steam Electric Plant, Mr. Henry H. Porter, Assistant Director Unit No. 2 South Carolina Department of Health Carolina Power & Light Company Bureau of Land & Waste Management 3581 West Entrance Road 2600 Bull Street Hartsville, South Carolina 29550 Columbia, South Carolina 29201 Mr. J. Paul Fulford Director of Site Operations Manager, Performance Evaluation and H. B. Robinson Steam Electric Plant, Regulatory Affairs PEB 5 Unit No. 2 Carolina Power & Light Company Carolina Power & Light Company Post Office Box 1551 3581 West Entrance Road Raleigh, North Carolina 27602-1551 Hartsville, South Carolina 29550 Mr. John H. ONeill, Jr.

Public Service Commission Pillsbury Winthrop Shaw Pittman, LLP State of South Carolina 2300 N Street NW.

Post Office Drawer 11649 Washington, DC 20037-1128 Columbia, South Carolina 29211 Ms. J. F. Lucas Manager - Support Services - Nuclear H. B. Robinson Steam Electric Plant, Unit No. 2 Carolina Power & Light Company 3581 West Entrance Road Hartsville, South Carolina 29550