ML20198R969
| ML20198R969 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 10/27/1997 |
| From: | Williams J NRC (Affiliation Not Assigned) |
| To: | Kingsley O TENNESSEE VALLEY AUTHORITY |
| References | |
| NUDOCS 9711130409 | |
| Download: ML20198R969 (4) | |
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,j NUCLEAR REGULATORY COMMISSION o
WASHINGTON D.C. 3066H001 October 27, 1997 Mr. Oliver D. Kingsley, Jr.
President, TVA Nuclear and Chief Nuclear Officer Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, Tennessee 37402 2801
SUBJECT:
BROWNS FERRY NUCLEAR Pt. ANT UNITS 1,2, AND 3 - REQUEST FOR INFORMATION REGARDING TORUS WALL THICKNESS
Dear Mr. Kingsley:
The Nuclear Regulatory Commission (NRC) staff is concemed that the Browns Ferry Nuclear Plant (BFN) Units 1,2, and 3 may not satisfy minimum wall thickness requirements for the Mark l containment torus structure. Torus wall thinning may have occurred as a result of corrosion of the steel shell in areas with defective or missing coatings. The wall thickness in those areas may be below the allowable wall thickness. The NRC staff is requesting information from the Tennessee Valley Authority (TVA) to address this concem.
l TVA is requested to provide information on results of torus inspections in the vicinity of the torus to-ring-girder support welds, at the air water interface, and :.1 submerged areas. TVA should verify whether the torus wall thickness meets minimum wall thickness reguliements, f
The information provided should include the minimum wall thickness at these locations, the p
methods used to determine the wall thickness, the required wall thickness, the condition of coatings on the insido of the torus, and the date of the measurements and observations, if degraded wall thickness is observed, TVA should provide an assessment of the as found pf[)
condition and long term integrity of the torus. This information can be obtained from recent inspections, or from inspection of the torus structure.
The NRC staff requests that TVA provide information currently available within 60 days of the l
date of this letter, if TVA voluntarily performs additional torus inspections, the staff requests that TVA submit a summary report within 45 days of the completion of the inspections.
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y Oliver Kingsley Please call me at (301)4151470 if you have any questions regarding this topic.
Sincerely, M
Joseph F. Williams, Project Manager Project Directorate ll 3 Division of Reactor Projects - 1/ll Office of Nuclear Reactor Regulation Docket Nos, 50 259, 50-260, and 50-296 cc: See next page
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Mr. Oliver D. Kingsley, Jr.
BROWNS FERRY NUCLEAR PLANT Tennessee Valley Authority cc:
Mr. O. J. Zeringue, Sr. Vice President Mr. Mark J. Burzynski, Managar Nuclear Operations Nuclear Licensing Tennessee Valley Authority Tennessee Valley Authority 6A Lookout Place 4J Blue Ridge 1101 Market Street 1101 Market Street Chattanooga, TN 37402-2801 Chattanooga, TN 37402-2801 Mr. Jack A. Bailey, Vice President.
Mr. Timothy E. Abney, Manager Engineering & Technical Services Licensing and Industry Affairs Tennessee Valley Authority Browns Ferry Nuclear Plant 6A Lookout Place Tennessee Valley Authority 1101 Market Street P.O. Box 2000 Chattanooga, TN 37402-2801 Decatur, AL 37402-2801 Mr. C. M. Crane, Site Vice President Regional Administrator, Region II Browns Ferry Nuclear Plant U.S. Nucloar Regulatory Commission Tennessee Valley Authority 61 Forsyth Street, SW., Suite 23T85 P.O. Box 2000 Atlanta, GA 30303-3415 Decatur, AL 35609 Mr. Leonard D. Wert General Counsel Senior Resident Inspector Tennessee Valley Authority U.S. Nuclear Regulatory Commission ET 10H Browns Ferry Nuclear Plant 400 West Summit Hill Drive 10833 Shaw Road Knoxville, TN 37902 Athens, AL 35611 Mr. Raul R. Baron, General Manager State Health Officer Nuclear Assurance Alabama Dept. of Public Health Tennessee Vallay Authority 434 Monroe Street 4J Blue Ridge Montgomery, AL 35130-1701 1101 Market Street Chattanooga, TN 37402-2801 Chairman Limestone County Commission Mr. Karl W. Singer, Plant Manager 310 West Washington Street Browns Ferry Nuclear Plant Athens, AL 35611
-Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609
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Joseph F. Williams. Project Manager Project Directorate 113 Division of Reactor P gjects l/II Office of Nuclear Reactor Regulation Docket Nos. 50-259,50-260, and 50-296 cc: See next page DISTRIBUTION:
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