ML20107L182

Rev 1 to 102075RCS01, Comparison of Calculated & Measured Pressures at Junction of Makeup Tank Surge Line & Pump Suction Pipe

ML20107L182
Person / Time
Site:	Crystal River
Issue date:	04/22/1996
From:	MPR ASSOCIATES, INC.
To:
Shared Package
ML20107L159	List: 3F0496-27, Forwards Interoffice Correspondence Dtd 960422,documenting Evaluation of Test Data Against Curve.Calculation Encl ML20107L182
References
102075RCS01, 102075RCS01-R01, 102075RCS1, 102075RCS1-R1, NUDOCS 9604290216
Download: ML20107L182 (10)

Text

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tot 924 553 4597 APR 22 1996 3 10?M u?95 P.23

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Pluject Review of Calculation of Allowable Makeup Tank Pressure vs. Level 102 075 D'

Comparison of Calculated and Measured Pressures at Junction of Mekeup Tonk Surge une and Pump Suction Pipe 102075RCS01 Proparer/Date Checker /Date.

Reviewer /Date Rev.No.

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i Purpnan The purpose of this calculation le to compare calculated and measund pressuns at the i

junction of the makeup tank surge line and the pump suction line.

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Aporoach:

Reference (1) describes the model used for calculating the pressure at the junction of the makeup tank surge line and the pump suction. This modelis used to calculate the allowable pnesures in the makeup tank, Reference (2).

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This calculation compares the pressures calculated using the Reference (1) modelwith i

pressures measured at the junction, Reference (3).

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Esanhai The ociculated pressures at the junction of the makeup tank surgo line and the makeup pump j

suction line are less than the measured values obtained during testing. He lower calculated l

pressure means that the calculational technique predlets a hiehar nrae*'re dron in the piping l

section between the BWST and the junction of the makeup tank surge line. The higher measured pressures confirm that there is, in fact,less pressure drop between the BWSr and the j

makeup tank surge line junction than the pressure drop the oniculational techniques would l

predict. Therefore, the test confirms that the calculational techniques used to evaluate

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pressure drop are conservative. This also means that the loss coefficiem (K hars) used in the calculations are conservatively h!gh.

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