ML20141N153

Procedure Fcr 85-201, Steam Generator Level Setpoint

ML20141N153
Person / Time
Site:	Davis Besse
Issue date:	02/26/1986
From:	TOLEDO EDISON CO.
To:
Shared Package
ML20141N145	List: ML20141N144 ML20141N147 ML20141N150 ML20141N153 ML20141N156 ML20141N160 ML20141N163 ML20141N168 ML20141N172 ML20141N176 ML20141N179 ML20141N180
References
FCR-85-201, TAC-61015, NUDOCS 8603040422
Download: ML20141N153 (1)

Text

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S/G LOW ' LEVEL SETPOINT y:R 85-201 I. PURPOSE A. Reduce possibility of actuating SFRCS on 26.5 in. low level trip.

II. DESCRIPTION A. Increase low level setpoint to 40 inches.

1. Raises power level at which Tave reaches 582 degrees F to approximately 28.5%.

3. Change the integrated master control low limit from 25%

to 28.S%.

1.

Cause the " Limited S/G Rx demand to Rx control" signal to be above 28.5%.

c. Change the low limit in the Rx control from 20% to 23.5%.

1. Prevent Tave control from driving the Rx demand signal below 23.5%.

III.

SUMMARY

A. This change raises the OTSG low level control setpoint in the Integrated Control System (ICS) from 35" to 40" on the startup OTSG level measurement B. This change requires no ICS hardware change C. Changes the operating primary temperature profiles

. . _ versus load for the NSS 2

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D.-

• Effects the Post trip response of the NSS

1. Results in a slightly increased rate of heat transfer from Primary to Secondary

2. Results in slightly greater outsurge from the pressurizar G603040422 860226 PDR ADOCK 05000346 V PDR

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