ML20099D318

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Forwards Revised Peaking Factor Limit Rept for Unit 1,Cycle 3 in Which Format Amended to Provide Exact Determination of W(Z) Vs Core Height as Function of Cycle Burnup.Revised Format Will Be Utilized During Remainder of Cycle 3
ML20099D318
Person / Time
Site: Sequoyah Tennessee Valley Authority icon.png
Issue date: 11/14/1984
From: Domer J
TENNESSEE VALLEY AUTHORITY
To: Berlinger C
Office of Nuclear Reactor Regulation
References
NUDOCS 8411200308
Download: ML20099D318 (5)


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TENNECEElVALLEYJ AUTHORITY /

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- November 14,x1984J._ _ '

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JDimotor of Yuolear Reactor 1. Regulation :.

n tAttention:1 Mr. Carl H.LBerlinger,; Chief,

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'r Core Performance Branch 1 1

' Division of Licensing" fU.S. Nuclear Regulatory Commission '

Washington,.~ D.C. l20555 [

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Dear Mr.LBerlinger:

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'In the Matter o'f f)~

? Docket' Nos. 50-327:

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. Tennessee Valley Authority' 4

By the January '24, -1984;1etter. to;you from L'.L M.' Mills, TVA provided the'-

Lpeaking; factor' limit' report for the Sequoyah Nuolear: Plant unit 51Coyolel3;

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operations in accordance.with paragraph 6.91.14 of the unit :1^ technical-.

. specifications.. Enclosed is'a revised' peaking factor. liaLtJmport forf unit

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1,! cycle 3;in which : the format' has been _ amended to ' provide an;exaot= deter-Laination oftW(Z), versus; core.heightias a, function of cycle burnup. JWe

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will~ be utilizing ~ this: revised 2 format"during -the: remainder of cycle 3 forJ I

t unit 1'.'

This is the same. format' submitted - to you on August' 23..1984 for L

~l Sequoyah: unit 2,. cycle 3, operation.-

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If you have any questions concerning _ this matter,' please get 'in touch -with '

Jerry Wills at FTS 858-2683.-

.j Very truly yours, TENNESSE'E. VALLEY AUTHORITY' f

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.J. A. Domer Nuclear Engineer 1 subsorgbedbeforeme Sworn.

this day of U/LM 1984

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a Notary Public L

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-Enclosure.

00:- U.S. Nuclear Regulatory Commission (Enclosure)

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L' Attn:-"Mr.! James.P. O'Reilly Administrator i,wk 101 Marietta Street, NW, Suite 2900 i.$5 Atlanta,= Georgia 30323 0

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. Director of Nuclev Reactor Regulation (Enclosure)

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~ Attention:' Ms. E. Adensam, Chief.

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Division of Licensing I"$ ' :

U.S.. Nuclear Regulatory Commission F1.

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. Washington, D.C.

20555 An Equal Opportunity Employer.

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V PEAKING FACTOR LIMIT REPORT FOR SEQUOYAH UNIT 1 CYCLE-3 RAOC OPERATION This peaking Factor Limit Report is provhded in accordance with Paragraph

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~6.9.1.9 of the Sequoyah Unit 1 Technical Specifications.

The Sequoyah Unit 1 Cycle 3 elevation dependent W(z) values for RAOC operation at. beginning, middle, and near end-of-life are shown in Figures 1 through 3 respectively. This information is~ sufficient to determine W(z) versus core height for Cycle 3 burnups in the range of 0 MWD /MTU to 14750 MWD /MTV through the use of three point inter-polation. W(z) was calculated using the method described in Part B-of Reference 1.

The appropriate W(z) function is used to confirm that the heat. flux hot channel factor, F (z), will be limited to the Technical Specification q

values of:

Fq(z)<2237

[K(z)] for P > 0.50 and p

F (z) < 4.474

[K(z)] for P < 0.50 g

The appropriate elevation dependent W(z) values, when applied to a power distribution measured under equilibrium conditions, demonstrates that the initial conditions assumed in the LOCA are met, along with the ECCS acceptance criteria of 10CFR50.46.

(1) WCAP-10216-P-A, Relaxation of Constant Axial Offset Control - Fg Surveillance Technical Specification.

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