ML20034C176

Forwards Safety Evaluation Accepting Util Proposal to Defer Mods of Forty Pipe Supports Inside Containment to Unit 1 Cycle 5 Refueling Outage

ML20034C176
Person / Time
Site:	Sequoyah
Issue date:	04/26/1990
From:	Black S Office of Nuclear Reactor Regulation
To:	Kingsley O TENNESSEE VALLEY AUTHORITY
Shared Package
ML20034C177	List: ML20034C176 ML20034C178
References
TAC-75338, NUDOCS 9005020138
Download: ML20034C176 (3)

Text

..,4 Docket No. 50 327 Mr. Oliver D. Kingsley, Jr.

Senior Vice President, Nuclear Power Tennessee Valley Authority 6N 38A Lookout Place 1101 Market Street Chattanooga, Tennessee 37402 2801 Dean Mr. Kingsley:

SUBJECT:

RIGOROUSLY ANALYZED PIPING PROGRAM, UNIT 1 CYCLE 4 REFUELING OUTAGE COMMITMENT REVISION (TAC 75338) - SEQUOYAH NUCLEAR PLANT, UNIT 1 By letter dated November 27, 1989, you proposed to revise your commitment to complete all post restart modifications resulting from the rigorously analyzed program by the end of the Cycle 4 refueling outage for each unit.

Your revised commitment is to defer no more than forty pipe support modifications for Unit 1 to the Unit 1 Cycle 5 refueling outage. The Unit 2 post restart modifications will be completed as you originally comitted to complete them.

The restart modifications were completed prior to the restart of each unit in 1980.

With the identification of additional-plant improvements and NRC commitments l

since the rc; tart of the ur.its, you initiated an integrated schedule for'the prioritization of all outstanding post restart activities.- This was to ensure that your resources for Sequoyah were allocated to the most beneficial projects.

As a result of this process, you stated that it would be beneficial to defer the work on no more than 40 Unit 1 pipe support modifications inside contain-ment until the Unit 1 Cycle 5 refueling outage.

We have reviewed the safety implications of deferring this work in containment and conclude that your proposal is acceptable.

Enclosed is our Safety Evalua.

tion which is the basis for accepting your proposal.

Sincerely, i

Original signed by Suzanne Blac(, Assistant Director-l for Projects j

oo426 TVA Projects Division t

9oomgosse gSoop,gg7 gDR Office of Nuclear Reactor Regulation DOCK Enclosure.

Safety Evaluation cc w/enclosuia:

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CC:

Mr. Marvin Runyon, Chairman Mr. Joseph Bynum, Acting Site Director Tennessee Valley Authority Sequoyah Nuclear Plant y

ET 12A 7A Tennessee Valley Authority 400 West Sumit Hill Drive P. O. Box 2000 Knoxville, Tennessee 37902 Soddy Daisy, Tennessee 37379 Mr. C. H. Dean, Jr., Director Mr. Mark J. Burrynski Tennessee Valley Authority Site Licensing Manager ET 12A 11A Sequoyah Nuclear Plant i

400 West Sumit Hill Drive P. O. Box 2000 i

Knoxville, Tennessee 37902 Soddy Daisy, Tennessee 37379 Mr. John B. Waters, Director County Judge i

Tennessee Valley Authority Hamilton County Courthouse ET 12A 9A Chattanooga, Tennessee 37402 400 West Sumit Hill Drive l

Knoxville, Tennessee 37902 Regional Administrator, Region 11 U.S. Nuclear Regulatory Comission Mr. W. F. Willis 101 Marietta Street, N.W.

Chief Operating Officer Atlanta, Georgia 30323 ET 12B 168 400 West Summit Hill Drive Mr. Kenneth M. Jenison i

Knoxville, Tennessee 37902 Senior Resident Inspector Sequoyah Nuclear Plant General Counsel U.S. Nuclear Regulatory Comission Tennessee Valley Authority 2600 Igou Ferry Road 400 West Sumit Hill Drive Soddy Daisy, Tennessee 37379 ET llB 33H Knoxville, Tennessee 37902 Mr. Michael H. Mobley, Director Division of Radiological Health Mr. Dwight Nunn T.E.R.R.A. Building 6th Floor Vice President, Nuclear Engineering 150 9th Avenue North Tennessee Valley Authority Nashville, Tennessee 37219-5404 6N 38A Lookout Place 1101 Market Street Dr. Henry Myers, Science Advisor Chattanooga, Tennessee 37402-2801 Comittee on Interior and Insular Affairs Dr. Mark 0. Medford U.S. House of Representatives Vice President and Nuclear Washington, D.C.

20515 Technical Director Tennessee Valley Authority Tennessee Valley Authority l

r 6N 38A Lookout Place Rockville Office Chattanooga, Tennessee 37402-2801 11921 Rocks;ille Pike Suite 402 Mr. Edward G. Wallace Rockville, Maryland 20852 M6 nager, Nuclear Licensing and Regulatory Affairs 1

Tennessee Valley Authority SN 157B Lookout Place i

I Chattanooga, Tennessee 37402-2801 l

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