ML20078Q991

Application for Amends to Licenses DPR-77 & DPR-79,revising TS 3/4.7.1.2 to Resolve Nonconservatism in TS Re Min turbine-driven AFW Differential Pressure Requirements

ML20078Q991
Person / Time
Site:	Sequoyah
Issue date:	12/16/1994
From:	Shell R TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20078Q997	List: ML20078Q991 ML20078R007
References
TVA-SQN-TS-94, TVA-SQN-TS-94-0, NUDOCS 9412230155
Download: ML20078Q991 (3)

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Hl4 Tennessee Vahey Autnanty. Post Othce Bon 2000. Soddy-Daisy. Tennessee 37379 December 16,1994 TVA-SON-TS-94-06 10 CFR 50.90 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:

In the Matter of ) Docket Nos. 50-327 Tennessee Valley Authority ) 50-328 SEQUOYAH NUCLEAR PLANT (SON) - TECHNICAL SPECIFICATION (TS)

CHANGE 94-06, " AUXILIARY FEEDWATER (AFW)"

Reference:

TVA letter to NRC dated September 23,1993, " Tennessee Valley Authority - Sequoyah Nuclear Plant Units 1 and 2 - Docket Nos. 50-327 and 50-328- Facility Operating Licenses DPR-77 and DPR Licensee Event Report (LER) 50-327/93024" i

in accordance with 10 CFR 50.90, we are enclosing an amendment to Licenses DPR-77 and DPR 79 to change the TSs of SON Units 1 and 2. The proposed change revises SON's AFW Specification 3/4.7.1.2 and the associated bases section to I incorporate the standard TS (NUREG-1431). The proposed change is being considered at this time in order to resolve a nonconservatism in SON's current TS with respect to the minimum turbine-driven AFW differential pressure requirements. Additional details are provided in the above referenced LER.

The proposed TS change is identified in Enclosure 1. The justification for the proposed TS change is provided in Enclosure 2. A proposed determination of no i significant hazards consideration performed pursuant to 10 CFR 50.92 is rrovided in Enclosure 3.

I 9412230155 941216 PDR P

ADOCK 05000327 A t PDR g

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U.S. Nuclear Regulatory Commission Page 2 December 16,1994 The cost savings and operational flexibility provided by this proposed TS change are of considerable benefit. The cost savings associated with relaxing a surveillance frequency (valve position verification) from once every 7 days to once every 31 days are estimated to be approximately $450,000cver the life of the plant. This estimate is based on: (1) a total remaining plant life for both units of 53 years, (2) an 80 percent capacity factor, and (3) a savings of 368 man-hours per unit per year. In addition, the cost savings associated with adopting the standard TS SR for verifying automatic valve position,in lieu of valve testing,is estimated to be approximately

$224,000over the life of the plant. This estimate is based on the factors (1) and (2) above with a savings of 189 man-hours per unit per year. For this reason, TVA requests that the proposed change be considered a cost beneficiallicensing action and prompt approval is requested.

TVA requests a 45-day implementation period for this TS change following issuance.

Please direct questions concerning this issue to Don Goodin at (615) 843-7734.

Sincerely, h,$, h R. H. Shell Manager SON Site Licensing Sworn t,9 and subsgribed before me s {' day of wrim/11A.) 1994

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NotatOthlic My Commission Expires c2 //f[

Enclosures cc: See page 3 l

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U.S. Nuclear Regulatory Commission Page 3 December 16,1994 (Enclosures):

Mr. D. E. LaBarge, Project Manager Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852-2739 Mr. Michael H. Mobley, Director (w/o Enclosures)

Division of Radiological Health 3rd Floor L & C Annex j 401 Church Street

' Nashville, Tennessee 37243-1532 NRC Resident inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379-3624 Regional Administrator U.S. Nuclear Regulatory Commission Region ll 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323-2711 l

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