ML072320004

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

ML072320004
Person / Time
Site:	Farley
Issue date:	08/30/2007
From:	Cotton K NRC/NRR/ADRO/DORL/LPLII-1
To:	Jerrica Johnson Southern Nuclear Operating Co
Cotton K R, NRR/DORL, 301-415-1438
References
GL-06-002, TAC MD0979, TAC MD0980
Download: ML072320004 (5)

Text

August 30, 2007 Mr. J. Randy Johnson Vice President - Farley Joseph M. Farley Nuclear Plant 7388 North State Highway 95 Columbia, AL 36319

SUBJECT:

JOSEPH M. FARLEY NUCLEAR PLANT, UNITS 1 AND 2 RESPONSE TO GENERIC LETTER 2006-02 "GRID RELIABILITY AND THE IMPACT ON PLANT RISK AND THE OPERABILITY OF OFFSITE POWER" (TAC NO. MD0979 AND MD0980)

Dear Mr. Johnson:

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 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 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 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 RA/RC 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), (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 that licensees respond to questions in the following areas:

J. R. Johnson (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 letter(s) dated March 31, 2006 (ADAMS Accession No. ML060900618) and January 30,2007 (ADAMS Accession No. ML070300848) 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 your responses are adequate and that no further action is requested of you at this time.

If you have any questions, please contact me at 301-415-1438.

Sincerely, EMarinos for /RA/

Karen Cotton, Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-348 and 50-364 cc: See next page

ML060900618) and January 30,2007 (ADAMS Accession No. ML070300848) 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 your responses are adequate and that no further action is requested of you at this time.

If you have any questions, please contact me at 301-415-1438.

Sincerely, EMarinos for /RA/

Karen Cotton, Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-348 and 50-364 cc: See next page DISTRIBUTION:

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ADAMS Accession No. ML072320004 OFFICE NRR/LPL2-1/PM NRR/LPL2-2/LA EEEB/BC NRR/LPL2-1/BC NAME KCotton:nc RSola GWilson EMarinos DATE 8/24/07 8/22/07 8/28/07 8/30/07 Joseph M. Farley Nuclear Plant, Units 1 & 2 cc:

Mr. B. D. McKinney, Licensing Manager Southern Nuclear Operating Company, Inc.

P.O. Box 1295 Birmingham, AL 35201-1295 Mr. M. Stanford Blanton Balch and Bingham Law Firm P.O. Box 306 1710 Sixth Avenue North Birmingham, AL 35201 Mr. J. Gasser Executive Vice President Southern Nuclear Operating Company, Inc.

P.O. Box 1295 Birmingham, AL 35201 State Health Officer Alabama Department of Public Health 434 Monroe St.

Montgomery, AL 36130-1701 Chairman Houston County Commission P.O. Box 6406 Dothan, AL 36302 Resident Inspector U.S. Nuclear Regulatory Commission 7388 N. State Highway 95 Columbia, AL 36319 William D. Oldfield SAER Supervisor Southern Nuclear Operating Company, Inc.

P.O. Box 470 Ashford, AL 36312