ML20128L582

Forwards Trojan Unit 1,Cycle 8 Radial Peaking Factor Limit Rept, Per Tech Spec 6.9.1.7.Peaking Factor Limits Unchanged.No Tech Spec Changes Required for Cycle 8 Operation

ML20128L582
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	05/01/1985
From:	Withers B PORTLAND GENERAL ELECTRIC CO.
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
NUDOCS 8505310391
Download: ML20128L582 (3)

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g Bart D Wthers Vce PresdcW May 1, 1985 Trojan Nuclear Plant Docket 50-344 License NPF-1 Mr. John B. Martin Regional Administrator, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek CA 94596-5638

Dear Mr. Martin:

TROJAN NUCLEAR PLANT Cycle 8 Radial Peakina Factor Report Pursuant to Technical Specification 6.9.1.7, attached is a copy of the Cycle 8 Radial Peaking Factor Limit Report for the Trojan Nuclear Plant.

The peaking factor limits have not changed and no Technical Specification changes are required for Cycle 8 operation.

Sincerely, v, F r' Bart D. Withers Vice President Nuclear Attachment c: Mr. Lynn Frank, Director State of Oregon Department of Energy Director Nuclear Reactor Regulation Attn: Chief Core Performance Branch U.S. Nuclear Regulatory Commission Washington DC 20555 P

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l APPEN0lK A i

TROJAN UNIT 1 CYCLE 8 RADIAL PEAKING FAC10R LIMIT REPORT This Radial Peaking Factor Limit Report is provided in accordance with Paragraph 6.9.1.7 of the Trojan Nuclear Plant Technical Specif1-cations.

The F,y limits for RATED THERMAL POWER within specific core planes for Cycle 8 shall be:

1.

y' less than or equal to 1.89 for all core planes con-F taining bank 'O' control rods..and RTP

2. F y less than or equal to 1.66 for all unrodded core l

l Planes.

These F,y(z) limits were used to confirm that the heat flux hot chan-nel factor F g(z) will be limited to the Technical Specification values of:

F9 (z) = [ UP ) (K(z)] for P > 0.5 and.*

Fg (t) = [4.64) (K(z)] for P $ 0.5*

assuming the most limiting axial power distributions expected to result from the insertion and removal of control banks C and D during opera-l tion, including the accompanying variations in the axial menon and power distributions as described in the ' Power Distribution Control and Load Following Procedures,' WCAP-8385. September,1974. Therefore, these i

F,y limits provide assurance that the initial conditions assumed in the LOCA analysis are met, along with the ECCS acceptance criteria of 10CFR50.46.

• K(z) - Figure 3.2-2 in Technical Specifications.

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0 3 4 e a 10 12 i i j BOTTOM Core Height (Feet)

FIGURE 1

! TROJAN UNIT 1 CYCLE 8 MAXIMUM (FQ*%Ed VERSUS l' CORE HEIGHT DURING NORMAL OPERATION

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