ML071150056
| ML071150056 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 05/03/2007 |
| From: | Ellen Brown NRC/NRR/ADRO/DORL/LPLII-2 |
| To: | Swafford P Tennessee Valley Authority |
| Brown Eva, NRR/DORL, 415-2315 | |
| References | |
| GL-06-002, RG-1.155, TAC MD0953, TAC MD0954, TAC MD0955 | |
| Download: ML071150056 (4) | |
Text
May 3, 2007 Mr. Preston D. Swafford Interim Chief Nuclear Officer and Executive Vice President 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801
SUBJECT:
BROWNS FERRY NUCLEAR PLANT, UNITS 1, 2, AND 3 - RESPONSE TO GENERIC LETTER 2006-02 (TAC NOS. MD0953, MD0954, AND MD0955)
Dear Mr. Swafford:
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 (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.
This GL notified licensees of the NRC staffs need for information in four areas as follows:
use of protocols between the nuclear power plant (NPP) and the transmission system operator (TSO), independent system operator, or reliability coordinator/authority 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; use of NPP/TSO protocols and analysis tools by TSOs to assist NPPs in monitoring grid conditions for consideration in maintenance risk assessments; offsite power restoration procedures in accordance with Section 2 of NRC Regulatory Guide (RG) 1.155, Station Blackout, and, 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.
Subsequently, on December 5, 2006, the NRC issued a Request for Additional Information (RAI) (ML063380308) regarding the resolution of GL 2006-02. The RAI requested a response to questions in the following areas:
switchyard minimum voltage, loss of real-time contingency analysis (RTCA) capability, verification of RTCA predicted post-trip voltage, identification of applicable single contingencies, seasonal variation in grid stress (reliability and loss-of-offsite power) probability, and interface with the transmission system operator during extended plant maintenance.
P. Swafford By letter dated April 3, 2007 (ML060950306) as supplemented by a letter dated January 11, 2007 (ML070330051), the Tennessee Valley Authority responded to the information request of GL 2006-02 and the subsequent RAI. Based on the information provided, the NRC staff has concluded that Browns Ferry Units 1, 2 and 3 remain in compliance with NRC regulatory requirements governing electric power sources and associated personnel training. Therefore, the NRC staff finds the response acceptable and is closing the TACs associated with this GL.
If you have any questions, please feel free to contact me at (301) 415-2315.
Sincerely,
/RA/
Eva A. Brown, Project Manager Plant Licensing Branch II-2 Division of Operating Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-259, 50-260 and 50-296 cc: See next page
ML071150056 NRR-106 OFFICE LPL2-2/PM LPL2-2/LA EEEB/BC LPL2-2/BC NAME EBrown BClayton GWilson TBoyce DATE 4/30/07 4/30/07 5/1/07 5/3/07
Preston D. Swafford BROWNS FERRY NUCLEAR PLANT Tennessee Valley Authority cc:
Mr. Ashok S. Bhatnagar, Senior Vice President Nuclear Operations Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Larry S. Bryant, Vice President Nuclear Engineering & Technical Services Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Brian OGrady, Site Vice President Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 General Counsel Tennessee Valley Authority ET 11A 400 West Summit Hill Drive Knoxville, TN 37902 Mr. John C. Fornicola, General Manager Nuclear Assurance Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Bruce Aukland, Plant Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Masoud Bajestani, Vice President Browns Ferry Unit 1 Restart Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Robert G. Jones, General Manager Browns Ferry Site Operations Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Larry S. Mellen Browns Ferry Unit 1 Project Engineer Division of Reactor Projects, Branch 6 U.S. Nuclear Regulatory Commission 61 Forsyth Street, SW.
Suite 23T85 Atlanta, GA 30303-8931 Ms. Beth A. Wetzel, Manager Corporate Nuclear Licensing and Industry Affairs Tennessee Valley Authority 4X Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801 Mr. William D. Crouch, Manager Licensing and Industry Affairs Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Senior Resident Inspector U.S. Nuclear Regulatory Commission Browns Ferry Nuclear Plant 10833 Shaw Road Athens, AL 35611-6970 State Health Officer Alabama Dept. of Public Health RSA Tower - Administration Suite 1552 P.O. Box 303017 Montgomery, AL 36130-3017 Chairman Limestone County Commission 310 West Washington Street Athens, AL 35611 Mr. Robert H. Bryan, Jr., General Manager Licensing and Industry Affairs Tennessee Valley Authority 4X Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801