ML18044A836

Revised Pages 3.10,3.10.1,3.10.2 & 3.10.3 for Proposed Change to Tech Specs Re Shutdown Margin Requirements

ML18044A836
Person / Time
Site:	Palisades
Issue date:	05/05/1980
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML18044A833	List: ML18044A832 ML18044A835 ML18044A836
References
NUDOCS 8005070480
Download: ML18044A836 (2)

Text

8006070 480l AITACHHENT Page Changes for Proposed Technical Specifications Change

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3.10 CONTROL ROD AND~R PISTRIBUTION LIMITS Applicability Applies to operation of control rods and hot channel factors during operation.

Objective To specify limits of control rod movement to assure an acceptabl~ power distribution during power operation, limit worth of individual rods to values analyzed for accident condit_ions, maintain adequate shutdown margin after a reactor trip and to specify acceptable power limits for power tilt conditions.

Specifications 3.10.1 Shutdown Margin Requirements

a. With four primary coolant pumps in operation at hot shutdown and above, the shutdown margin shall be 2%.

b. *with less than four primary coolant pumps in operation at hot

-shutdown_ and above, the shutdown margin shall be increased to and maintained at~ 3.75%. -

c. At less than the hot shutdown condition, boron concentration shall be shutdown boron concentration.

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d.- If a control rod cannot be tripped, shutdown margin shall be increased by boration as necessary to compensate for the worth of the withdrawn inoperable rod.

e. The drop time of each control rod shall be no greater than 2.5 seconds from the beginning of rod motion to 90% insertion.

3.10.2 Individual Rod Worth

a. The maximum worth of any one rod*in the core at rated power shall be equal to or less than 0.6% in reactivity.

b. The maximum worth of any one rod in.the core at zero power shall be equal to or less than 1. 2% in reactivity.

3.10.3 Power Distribution Limits

a. The linear heat generation rate at the peak power Elevation z shall not exceed:

15.28 kW/Ft x F (Z) for ENC Fuel Types A

14.12 kW/Ft x FA(Z) for D Type Fuel where the function F iZ) is*_ shown- in Figure 3. 9. If the power dis-tribution is double peaked, both peaks shall satisfy- the criterion.

Appropriate consid~ration shall be given to the following factors:

(1) A flux peaking augmentation factor of 1.0, (2) A measuremen~ calculational uncertainty factor of 1.10, 3-58