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)

Text

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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 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

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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 r4.sz

.j 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

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l TVA Projects Division 3

U.S. Nuclear Regulatory Commission 1

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Region II j,

101 Marietta Street, NH, Suite 2900 i

Atlanta, Georgia 30323 l,