ML20244E476

Application for Amend to License DPR-77,providing Alternate Method for Determining Position of Nonindicating Rod Described in Action a.1 of Tech Spec 3.1.3.2, Position Indication Sys - Operating

ML20244E476
Person / Time
Site:	Sequoyah
Issue date:	06/16/1989
From:	Medford M TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20244E478	List: ML20244E476 ML20244E480
References
IEB-88-009, IEB-88-9, NUDOCS 8906200362
Download: ML20244E476 (2)

Text

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.- A j J j,4 TENNESSEE VA1. LEY AUTHORITY

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SN 157B Lookout Place F

June 16, 1989

' TVA-SQN-TS 31 - 10 CFR 50.90 w

-U.S. Nuclear.. Regulatory Comn.ission y , ATTN $ Document Control Desk

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Washington, D.C. 20555

!) Centlenen:

In the Matter of ) Docket No. 50-327 Tennescee Valley Authority )

M SEQUOYAH NUCLEAR PLANT (SQN) UFIT 1 - TFCHNICAL~ SPECIFICATION (TS) CHANGE 89-31 In accordance with 10 CFR 50.90. I am enclosing a requested amendment to

. license DPR-77 to change the TSs of SQN Unit 1. The proposed change provides b ' an alternative method for determining the position of a nonindicating rod i described in Action a.1 of TS 3.1.3.2, '.' Position Indication Systems --

Operating." .: The preposed :hange. applies only to shutdown control rods.

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'rd significant hazards consideration performed pursuant to 10 CFR 50.92 is provided in Enclos'tre 3.-

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This IS change is requested on an exigent basis because~cf the unanticipated E"

failure of a rod position indicator (RPI) channel and the concern about wear on the incore thimble tubes identified in NRC Bulletin 88-09, " Thimble Tube Thinning in Westinghouse Reactors." Operation with one RPI per bank

-inoperable is allowed by TS 3.1.3.2 provided the applicable action statement requirement is met. SQN plans to operate in this condition until the next outage when. maintenance can be performed in the area of the reactoi vessel

' head.

TVA also requests that the proposed change to Specification 3.1.3.2

. Action a.1, be exempt from the requireronts of Specification 3.0.4 for the renminder of Unit 1 Cycle 4. This change would preclude a forced Mode 5 outage for the sole nurpose of repairing the RPI(s) without reducing safety.

the determination of position .A nonindicating rod (s) using the incore moveable detectors once every 8 'nours as currently required by TS 3.1.3.2 will tilgnificantly increase the wear on the thimble tubes. As described in Enclosure 2, TVA submits thac the proposed alternative method of vterifying rod (s) positiRa meets the inter.t of Specification 3,1.3.2 without reducing the expected life of . the affecteG thitable tubes.

TVA, therefore, requesta that thie proposed change be processed on an exigent basis.

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,U.S Nuclear Regulatory Conunission June 16', 1989-

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, Please direct questicas concernig thic issue to B. S. Schofield et.

@? '(615) 843-6172.

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hY" Very trcly years, g TENNESSEE VALLEY AUTHORITY

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"L Mark O. Medford, Vice.P esident

- 4 and Nu61 ear Technical Director 9, Sworn to and subscribed before ne

." .thisi/fffday,of 1909

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Notary tublic My Conunission Ekpires /f/79 j'

cc,(Enclosures): ~'

Ms. S. C.: Black, Assistant Director for Projects, TVA Projects Division l U.S. Nuc1 car Pagulatory Consnisaion One White Flint, North I 11555 Rockvil7e Pika Rockville, Maryland 20852 Mr. B. A. Wilson, Assisitant Director.

for Inspection Programs TVA Projects Division.

U.S. Nuclear Regulatory Comnission Region II.

101 Marietta Street, NW, Suito 2900 Atlanta, Georgia 30323' Mr.: Michael H. Mobley, Director (w/u onclosures)

Division of Radiological Health T.E.R.R.A. Building 150 9th Avenue, N Nashville, Tennessee 37203 NRC Resident Inspector Sequayah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy. Tennessee 37379 M.erican Nuclear Insurers Attention: Librarian The Exchange,-Suite 245 2N Farmington Avenue

.Farsiington, Connecticut 06032

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