ML20059N825

Application for Amend to License DPR-79,consisting of Tech Spec Change 89-27 to Reflect Eagle 21 Mod & Functional Upgrades to Plant Reactor Protection Sys

ML20059N825
Person / Time
Site:	Sequoyah
Issue date:	10/02/1990
From:	Wallace E TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20059N826	List: ML20059N825 ML20059N827
References
TVA-SQN-TS-89-2, NUDOCS 9010180007
Download: ML20059N825 (3)

Text

,

. ,;, > - p >q

e;

-~

TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 374ot 2

-51 157B Lookout Place 00T 021990

- TVA-SQW-TS-89-27 10 CFR-50.90

- U.S. Nuclear Regulatory Commission

^ ATTN: -Document Control Desk Washington, D.C. 20555

!Centlemen:

In the Matter of ) Docket No'. 50-328-

-Tennessee Valley Authority )

i SEQUOYAH NUCLEAR PLANT (SQN) UNIT 2 - REVISION TO TECHNICAL SPECIFICATION (TS)

CHANCE 03-27

References:

1. TVA letter to NRC dated January 24, 1990, "sequoyah Nuclear.

Plant-(SQN) - Technical Specification (TS) Change 89-27" I

2. TVA letter to NRC dated April 23, 1990, "Sequoyah Nuclear Plant (SQN) - Eagle 21'Setpoint: Methodology - Westinghouse Riectric Corporation WCAPs 11239 and111626"

3. TVA letter to'NRC dated May 15, 1990, "Sequoyah Nuclear Plant

-(SQN) - Revision to Technical Specification (TS) Change 89-27" Reference 1 transmitted to'NRC proposed TS changes to reflect the Eagle 21 modification: and functional upgrades to th SQN reactor protection system.

Trip setpoints and allowable: values were' calculated using standard Westinghouse-

-setpoint' methodology and that was: transmitted-to NRC in Reference 2.

. ' Reference 3, transmitted to NRC the eevision.to steam generator water-level adverse trip setpoints because of inadequate consideration of! reference les Lheatup environmental allowance associated with the, trip-time delay.

This letter < transmits revised Unit.2 TS pages for the steam gc.nerator water

' level trip setpoints-(Table 2.2-1, Reactor Trip System Instrumentation Trip

e. -Setpoints -Items 13.a and b, and Table 3.3-4, Engineered' Safety Feature 4 Actuation 1 System Trip Setpoints, Item 6.c), to account for.the installation:of 9 ,

modified International Telephone and-Telegraph Corporation (ITT);Barton steam generator level' transmitters for. Unit 2 only.. The modifled Barton Model.764

, level transmitters have'been procured for Unit 2'and are being. installed

? ,

during the ongoing Unit 2 Cycle 4 refueling outage'. Modified Barton-steam F , generator level transmitters will be installed in Unit 1 at a later date, and~

ya separate TS change will be processed for this1 activity.

1The proposed TS 89-27 revision is-identified in inclosure 1. The pages provided in_ Enclosure-1 of'this letter superse'e the corresponding pages provided.in Enclosure'1.of Reference 3. N justification for the proposed TS 89-27-revision is provided:in Enclos e. 2. The proposed TS 89-27 revision does not alter the conclusions drawn in.the environmental impact evaluation.or (the;no significan hasards consideration f.ubmitted with TS 89-27 (Reference 1).

1 Consequently, the salua ions' are- not resubmitted by this package.

9010100007 DR 901002 P~

ADOCK 0500032sN

+

7 PNU '

. An EquM Opportunity Employer h f--

MlfL ,

' //7' I

-2a

- U.S. Nuclear Regulatory Comnission W 02 Ma The installation'of the modified Barton level transmitters will allow the-use of the proposed _ lower steam generator level setpoints and reduce the-susceptibility for unnecessary reactor trips and engineered safety feature actuations.during normal and start-up feedwater transients. For Unit 2 this is being implemented during the ongoing Cycle 4 refueling outage and will be available for use'of the new setpoints during restart. The availability of the modified Barton transmitters was not confirmed until early September 1990 to support-installation during~this_ refueling outage.. For these reasons, we request expedited NRC review and approval to allow use of the new setpoints for Unit 2 restart..

Please direct questions concerning this issue to Keith C. Weller at  ;

(615) 843-7527. j Very truly yours, TENNESSEE VALLEY AUTHORITY

/  !

> e E. G. Wallace, Manager Nuclear Licensing and Regulatory Affairs _

Sworn to pnd subscribed b fore me this 2 % day of O A 1990 Notary Public 1 My Commisston Expires /lh )

Enclosures cc: See page 3 l

1 i (!: i l

( , . f t (' 3

y

i. *- ';

7

. - 3 <.

m - U.S.'Wuclear Regulatory Comnission 0 2 E' cc.(Enclosures):

American Nuclear Insurers Attentions .Librarlan The Exchange, Suite 245 270 Farmington Avenue

- Farmington, Connecticut 06032 Ms. S. C. Black,JDeputy Director Project Directorate 11-4 1 U.S.1 Nuclear _ Regulatory Commission

. One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. J. W. Donohew Project Manager' U.S. Nuclear Regulatory commission l

j i

One. White Flint, North 11555 Roc'tville Pike' ,

. Rockville, Maryland 20852' l Mr.; Michael H. Mobley, Director (w/o Enclosures)

Division of Radiological Health i T.E.R.R.A. Building 1 150 9th Avenuo,-N, Nashville, Tennessee 37203 i NRC Resident Inspector j' 4

Sequoyah Nuclear Plant

, =2600LIgou-Ferry Road.

Soddy Daisy, Tennessee' 37379

]j 4

- Mr.LB.tA. Wilson, Project Chief

+

. U.S. Nuclear Regulatory Commission g Region 11 '

101 Marietta Street, NW, Suite 2900 q Atlanta, Georgia 30323. ,

l X '

l

-i "Ji1 'J.

4  :

)f i s i

1 i>