ML20087B472
| ML20087B472 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 01/31/1992 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20087B469 | List: |
| References | |
| NUDOCS 9201130147 | |
| Download: ML20087B472 (2) | |
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/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 Cycle 4 Rev.1 c
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
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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 d
a = +.009 x 10 AK/K/*
The Acceptance Criteria is 10.2 x 10" AK/K/*F, Acceptance Criteria met? = Yes i
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