ML18033B489

Forwards Safety Evaluation & Technical Evaluation Rept EGG-NTA 8341 Considering Actions Per Generic Ltr 83-28,Item 4.5.3 Re Reactor Trip Sys Reliability for Domestic Operating Reactors

ML18033B489
Person / Time
Site:	Browns Ferry
Issue date:	08/17/1990
From:	Ross T Office of Nuclear Reactor Regulation
To:	Kingsley O TENNESSEE VALLEY AUTHORITY
References
GL-83-28, TAC-53964, TAC-53965, TAC-53966, NUDOCS 9008230030
Download: ML18033B489 (6)

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UNITEDSTATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 August 17, 1990 Docket Nos. 50-259, 50-260 and 50-296 I',r. Oliver D. Kingsley, Jr.

Senior Vice President, Nuclear Power Tennessee Valley Authority 6N 38A Lookout Place 1101 hlarket Street Chattanooga, Tennessee 37402-2801

SUBJECT:

SAFETY EVALUATION OF GENERIC LETTER 83-28, ITEN 4.5.3, REACTOR TRIP RELIABILITY-ON-LINE FUNCTIONAL TESTING OF THE REACTOR TRIP SYSTEhl (TAC NO. 53964,

53965, 53966)

Generic Letter (GL) 83-28, Item 4.5.3, required confirmation from all licensees and applicants that on-line functional testing of the reactor trip

system, including independent testing of the diverse trip feature, was being performed.

By letter dated July 5, 1990, the Tennessee Valley Authority (TVA) submitted an updated response to GL 83-28, Item 4.5.3, for the Browns Ferry Nuclear Plant (BFN).

Therein, TVA confirmed their endorsement of the Boiling Mater Reactors Owners'roup (BMROG) Reports NEDC-30844 and 30851P for BFN, Unit 2.

The NRC staff, with the assistance of our contractor, Idaho National Engineering Laboratory (INEL), has reviewed your response(s) and the BMROG reports.

By virtue of TVA's endorsement and application of these topical

reports, we conclude that the existing intervals for on-line functional testing at BFN, Unit 2, are consistent with achieving high reactor trip system availability.

Furthermore, teleconferences with BFN site licensing personnel confirmed that TVA also endorses the BMROG reports for Units 1 and 3.

However, TVA has not as yet evaluated the plant specific applicability of these topical reports for either unit.

TVA plans to implement the BMROG recommendations for both Units 1 and 3 on a schedule commensurate with restart of each unit.

The enclosed safety evaluation and contractor's report (EGG-NTA 8341) provide the details and basis for our conclusions.

Therefore, we consider the related licensing actions for GL 83-28, Item 4.5.3, to be complete for BFN, Units 1, 2

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Mr. Oliver D. Kingsley TVA should notify the staff when Item 4.5.3 of GL 83-28 has been fully implemented at Units 1 and 3 so that the staff can update its Safety Issues Management System (SINS) accordingly.

If you have any questions regarding this letter, please do not hesitate to contact me at (301) 492-1313.

Sincerely, Original signed by

Enclosures:

As stated cc w/enclosures:

See next page Thier ry Ross, Project Manager Project Directorate II-4 Division of Project Directorate - I/II Office of Nuclear Reactor Regulation Distribution NRC PDR Local PDR S.

Varga G. Lainas F.

Hebdon S. Black B. llilson P. Kellog C. Patterson M. Krebs T. Ross D. Moran B. Mozafari OGC E. Jordan ACRS (10)

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Mr. Oliver D. Kingsley, Jr.

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Mr. Marvin Runyon, Chairman Tennessee Valley Authority ET 12A 7A 400 West Summit Hill Drive Knoxville, Tennessee 37902 Mr. Edward G. Wallace

Manager, Nuclear Licensing and Regulatory Affairs Tennessee Valley Authority 5N 157B Lookout Place Chattanooga,- Tennessee 37402-2801 Mr. John B. Waters, Director Tennessee Valley Authority ET 12A 9A 400 West Summit Hill Drive Knoxville, Tennessee 37902 Mr. W. F. Willis Chief Operating Officer ET 12B 16B 400 West Summit Hill Drive Knoxville, Tennessee 37902 General Counsel Tennessee Valley Authority 400 West Summit Hill Drive ET 11B 33H Knoxville, Tennessee 37902 Mr. Dwight Nunn Vice President, Nuclear Engineering Tennessee Valley Authority 6N 38A Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801 Dr. Mark 0. ttedford Vice President and Nucl ear Technical Director Tennessee Valley Authority 6N 38A Lookout Place Chattanooga, Tennessee 37402-2801 Mr. 0. J. Zeringue, Site Director Browns Ferry Nuclear Plant Tennessee Valley Authority P. 0.

Box 2000

Decatur, Alabama 35602 Mr. P. Carier, Site Licensing Manager Browns Ferry (luclear Plant Tennessee Valley Authority P. 0.

Box 2000

Decatur, Alabama 35602 Mr. L. W. Myers, Plant Manager Browns Ferry Nuclear Plant Tennessee Valley Authority, P. 0.

Box 2000

Decatur, Alabama 35602

Chairman, Limestone County Commission P. 0.

Box 188

Athens, Alabama 35611 Claude Earl Fox, M.D.

State Health Officer State Department of Public Health State Office Building Montgomery, Alabama 36130 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W.

Atlanta, Georgia 30323 Mr. Charles Patterson Senior Resident Inspector Browns Ferry Nuclear Plant U.S. Nuclear Regulatory Commission Route 12, Box 637

Athens, Alabama 35611 Tennessee Valley Authority Rockvi lie Office 11921 Rockville Pike Suite 402 Rockvil le, Maryland 20852

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