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 ,

'10;CFR'50.9T y

U;S; Nuclear Regulatory Commission ATTN Document Control Desk -

Washington, D.C.,~20555L

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'Gentlement. ,

1In the Matter ofJ _ ' )' Docket Nos.1 50-327.L ?O Tennessee Valley. Authority  ;) . 50-328L >

y SEQUOYAH NUCLEAR. PLANT. (SQN) ' REVISION.

TO TECHNICAL SPECIFICATION (TS)' .

CHANGE 89 >

O -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"

Reference 1. transmitted to NRC proposedLTS changesDto reflect the'EagleI21 I 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. ,

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

t. not adequately' reflect the reference leg heatup environmental. allowance , '!

associated with the TTD-function. TVA wa's notified of this' discrepancy by '

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Westinghouse Electric' Corporation.on May 11,'1990. "[

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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.Very trul'y yours, j TENNESSEE VALLEY AUTHORITY <

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M. A.. Cooper Acting Manager.. 1 Sequoyah Site ~ Licensing before'me 3 Sworn this to'day nd subscrlhc}OA/

of / N . 1990

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My Commission Expires /d d .

.r Enclosurr+ . _

i cc: American. Nuclear, Insurers (Enclosures)

Attention: ~ Librarian. ~j The-Exchange. Suite 245  ;

270 Farmington Avenue '

l Farmington, Connecticut 06032 n

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

l- for Projects _

l TVA Projects Division mi

-U.S. Nuclear Regulatory-Commission  !

One White Flint, North 4 l 11555 Rockville Pike ,

L Rockville, Maryland 20852 )

Mr. Michael H. Mobley, Director f

( Division of Radiological Health {l l: T.E.R.R.A. Building l

150 9th Avenue, N ,

( :' Nashville, Tennessee 37203 L 3

L NRC Resident Inspector (Enclosures)

! Sequoyah Nuclear Plant L

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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