ML20042F247

Revised Tech Spec Change 89-27 to Licenses DPR-77 & DPR-79, Making Nominal Setpoints & Allowable Value Consistent W/ Issued Setpoint Methodology

ML20042F247
Person / Time
Site:	Sequoyah
Issue date:	04/25/1990
From:	Michael Ray TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20042F248	List: ML20042F247 ML20042F251 ML20042F253 ML20042F255
References
NUDOCS 9005080048
Download: ML20042F247 (2)

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TENNESSEE VALLE AUTHORITY CH ATTANOOG A, TENNESSEE 37401 SN 1578 Lookout Place APR 251990 TVA-SQN-TS-89-27 10 CFR 50.90-U.S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, D.C. 20555 Gentlemen:

d In the Matter of ) Docket Nos. 50-327 Tennessee Valley Authortty ) 50-328' SEQUOYAH NUCLEAR PLANT (SQN) - REVISION TO TECHNICAL SPECIFICATION (TS)

CHANGE 89-27 By letter dated January 24, 1990, TVA submitted TS 89-27, proposing changes to the SQN-TSs to reflect the Eagle 21 upgrades and enhancements to the' reactor.

protection system. As TS 89-27 was submitted in parallel with the' issuance of the final Westinghouse Electric. Corporation setpoint methodology for Eagle 21',

several values proposed in TS.89-27 differ from those in the'_ issued setpoint methodology. The enclosed revisions to TS 89-27 will make the 15 nominal .

setpoints and allowable values consistent with those presented in;the.setpoint "

methodology. One additional change is' proposed to_ reflect the"results of.TVA calculations that determined the-allowable values and channelcfunctional test. i intervals for the containment sump and refueling waterEstorage tank-(RHST)-

swapover setpoints. Two additional changes are also proposed for' completeness and clarity.

The proposed TS 89-27 revision is identified in Enclosure 1. The pages provided in Enclosure l' supersede the corresponding pages piovided in Enclosure 1 of TS 89-27. . The justification for the proposed TS 89-27crevision is provided in Enclosure ?. Calculations supporting the proposed containment-sump and RHST allowable values are provided in Enclosure 3. The proposed TS 89-27 revisions do_not alter the conclusions drawn in the environmental H 1mpact evaluation.or the no significant hazards consideration submitted with; IS 89-27. Consequently, these evaluations are not resubmitted by_this-package.

To facilitate the schedule for NRC review of these revisions, the SQN Nuclear -

Safety Review Board collegial review is being performed concurrently with the

'NRC review.

jsPR838:8888lh7 sy An Equa'l opportunity Ernployer

e' . . a U.S. Nuclear Regulatory Commission APR 25 390 ,

Please direct questions concerning this issue to Russell R. Thompson at (615) 843-7470.

Very truly yours, TENNESSEE VALLEY AUTHORITY r .j 4.sz M.J. day,Managbr  !

Licensing Project Management Sworn to-and subscribed before me this o76 6 day of J o LI 1990 a & b-Notary Public /

My Commission Expires ll/d /91 Enclosures cc: American Nuclear Insurers (Enclosures)

Attention: Librarian The Exchange, Sulte 245 270 Farmington Avenue Farmington, Connecticut 06032 Ms. S. C. Black, Assistant Director (Enclosures) for Projects .

TVA Projects Division U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike .

Rockville, Maryland 2085? j

.i Mr. Michael H. Mo'> ley, Direclor .!

Division of Radiological Health T.E.R.R.A. Building-150 9th Avenue, N

. -q Nashville, Tennessee 37203 NRC Resident Inspector (Enclosures) .t Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379 Mr. B. A. Wilson, Assistant Director (Enclosures) a for Inspection Programs l TVA Projects Division ] 3 U.S. Nuclear Regulatory Commission 1

( Region II j, 101 Marietta Street, NH, Suite 2900 i Atlanta, Georgia 30323 l,