ML20087B472

Revised Millstone Nuclear Power Station Unit 3,Startup Test Rept,Cycle 4.

ML20087B472
Person / Time
Site:	Millstone
Issue date:	01/31/1992
From:	NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20087B469	List: ML20087B464 ML20087B472
References
NUDOCS 9201130147
Download: ML20087B472 (2)

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d 1/ /92 MI' Docket No. 50-423 411LLSTONE NUCLEAlt l'OWElt STATION UNIT NO. 3 STAllTUl> TEST REl'OllT C Y C 1.E 4 JUNE 1991 Section 3.2 Revised January,1992 e.

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Docket No. 50-423 Millstone #3 Startup Report c

.' Cycle 4 Rev.1 3.2 bothermal/ Moderator Temnerature Coefficients The isothermal Temperature Coef ficient (lTC) was measured at two dif ferent RCCA configurations; at All Rods Out and with Control llank D, C U & A inserted. Values for the Moderator Temperature Cotificient (MTC) were then calculated.

All Rods Out ITC Measurernent The measured ITC value with Control Bank D at 207 steps, an average RCS tempera. i ture of 554*F, and an RCS Boron Concentration of 2217 ppm was +.056 x 10-8 SK/K/'F.

Comparing the measured ITC value 10 the predicted value yields:

Measured ITC at BOL ARO = +.056 x 10" AK/K/*F Predicted ITC at BOL, ARO = .014 x 10" AK!K/'F A= .070 x 10" AK!K/'F The Acceptance Criteria is 0.2 x 10" AK/K/*F. ,

Acceptance Crite"ia met? Yes All Rods Out MTC Determination The MTC was calculated by st.btracting the design Doppler Temperature Coefficient ,

from the ARO ITC. In addition to comparing the measured MTC value to the pre.

dicted value, it was also required to verify that the Technical Specification MTC i limit of < +.5x10" AK/K/*F at ARO, HZP was met. l

. a Comparing the measured ITC value to the predicted value yields:

~

Calculated MTC- at BOL, ARO = .225 x 10" AK/K/'F Predicted MTC at BOL, ARO = .230 x 10" AK/K/'F Technical Specification Acceptance Critena c +.5x10" AK/K/'F, Acceptance Criteria met? Yes Control Banks R C. B. and A Inserted ITC Measurerjintt The measured ITC vaive with Control Bank D C, B & A inserted at an average RCS .

temperature of 555'F, and RCS Boron Concentration of 1718 ppm was .740 x

-10" AK/K/*F.  ;

Comparing the measured ITC value to the predicted value yields: i Measured ITC at BOL, ARl - ,740 x 10-d AK/K/'F Predicted ITC at BOL, ARI- .749 x 10" AK/K/*F a = +.009 x 10 d AK/K/*

The Acceptance Criteria is 10.2 x 10" AK/K/*F, Acceptance Criteria met? = Yes i

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