ML20043A239

Forwards Revised Tech Spec Pages to Support Tech Spec Change 89-27 Re Steam Generator Water Level Adverse Trip Setpoints for Reactor Trip Sys Instrumentation & Esfas. Encl Reflects Ref Leg Heatup Environ Allowance

ML20043A239
Person / Time
Site:	Sequoyah
Issue date:	05/15/1990
From:	Cooper M TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20043A240	List: ML20043A239 ML20043A253
References
NUDOCS 9005210067
Download: ML20043A239 (2)

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,t TVA-SQN-TS-89-27; i

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U;S; Nuclear Regulatory Commission ATTN Document Control Desk

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Washington, D.C.,~20555L Si

'Gentlement.

1In the Matter ofJ

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Docket Nos.1 50-327.

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Tennessee Valley. Authority

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SEQUOYAH NUCLEAR. PLANT. (SQN)

' REVISION. TO TECHNICAL SPECIFICATION (TS)'

CHANGE 89 '

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-Referencest

1. 1TVA letter to NRC' dated January 24,i1990, "SequoyahiNuclear?

Plant (SQN)1-Technical Specification.(TS) Change 189-27"i y

2. - TVA ' letter to: NRC dated April _- 23, 1990, ? '_'Sequoyah Nuclear Plant'(SQN)J-Eagle 21:Setpoint Methodology 7-?Westinghouser

'I Electric Corporation WJus 11239 and 11626" I

Reference 1. transmitted to NRC proposedLTS changesDto reflect the'EagleI21 modification and functional upgrades to the SQN reactor protection. system.

1 Trip setpoints and allowable values:were calculated using standard Westinghouse setpoint methodology and thatLwas: transmitted:tolNRC.in' Reference 2.

~!O This le'tter transmits revised TS pages for the steam 1 generator. water level.

d adverse trip setpcints-(Table 2.3-1, Reactor Trip System Instrumentation Trip i

Setpoints? Items 13.a. and b,-and~ Table 3.3-4,. Engineered Safety Feature j

- Actuation System Trip Setpoints, Item 6;c) to ' account for :the' steam. generator, reference leg heatup environmental allowancefconsideringithe. effects'of~the

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trip time delay..(TTD). The setpoints 'origina11y submitted _ by: Reference '1' did i

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not adequately' reflect the reference leg heatup environmental. allowance associated with the TTD-function. TVA wa's notified of this' discrepancy by Westinghouse Electric' Corporation.on May 11,'1990.

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The proposed TS:89-27_ revision lis-identifiedLin Enclosure l'.

'Thelpages' i

provided in Enclosure 1 of this'1etter. supersede the corresponding pages provided in Enclosure _1 of Reference 1.

The-justification for the. proposed i

'TS!89-27-revision is provided in Enclosure 2..'The proposed TS 89-27 revision does not alter'the conclusions drawn'in the environmental. impact eva~1uation or' 1

L the no significant hazards consideration submitted with TS 89-27 (Reference 1).

Consequently, these evaluations are not resubmitted by'this; package.

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1 Pleasedirectq'uestionsconcerning[thi[-issuetoRussellR.Thompsonaty (615) 843-7470.

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.Very trul'y yours, j

TENNESSEE VALLEY AUTHORITY Y.h,

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j M. A.. Cooper Acting Manager..

1 Sequoyah Site ~ Licensing Sworn to' nd subscrlhc}OA/ 1990 before'me 3

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i cc: American. Nuclear, Insurers (Enclosures)

Attention: ~ Librarian.

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Farmington, Connecticut 06032 n

I Ms.S.C.-Black,AssistantDirector-(Enclosures)I

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l l-for Projects mi TVA Projects Division

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Mr. Michael H. Mobley, Director f

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Division of Radiological Health

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NRC Resident Inspector (Enclosures)

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2600EIgou' Ferry Road Soddy Daisy. Tennessee 37379-l Mr. B.:A. Wilson, Assiscant Director (Enclosures) for Inspection Programs TVA Projects Division n

U.S. Nuclear Regulatory Commission.

Region.II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323' j

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