ML20040B245

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Forwards Revised Figure Re Froth Impact Loads.Revision Illustrates Added NRC Conservatism of 3 Psi to Forth Impact Pressure as Defined by Figure of NRC Presentation Best Estimate Methodology for Froth Impact Loads
ML20040B245
Person / Time
Site: Grand Gulf  
Issue date: 01/20/1982
From: Dale L
MISSISSIPPI POWER & LIGHT CO.
To: Harold Denton
Office of Nuclear Reactor Regulation
References
AECM-82-34, NUDOCS 8201250305
Download: ML20040B245 (2)


Text

4 MISSISSIPPI POWER & LIGHT COMPANY Helping Build Alississippi P. O.

B O X 16 4 0. J A C K S O N, MISSISSIPPI 205 Noctt As PnooucTION DE PARTMENT U.S. Nuclear Regulatory Commission M'TU s

Office of Nuclear Reactor Regulation 9-Washington, D.C.

20555 Z

g O I982h

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Attention:

Mr. Ilarold R. Denton, Director Y

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Dear Mr. Denton:

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SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416 and 50-417 File 0260/5007/L-334.0/M-001.0 Ilydrodynamic LOCA Loading of IICU Floor AECM-82/34 As committed to in our letter AECM-82/30, dated January 19, 1982, Mississippi Power & Light Company is providing the attached revised figure as requested by the NRC on froth impact loads. The attached figure illustrates the added NRC conservatism of 3 psi to the froth irpact pressures as defined by Figure 4 of the NRC (G.

Maise) presentation of "Best Estimate Methodology for Froth Impact Loads".

If you have any questions or require further information, please contact this office.

Yours truly,

/

L. F. Dale f

Manager of Nuclear Services JilS /JGC/JDR: rg Attachment cc:

Mr. N. L. Stampley (w/a)

Mr. R. B. McGehee (w/a)

Mr. T. B. Conner (w/a)

Mr. C.

B. Taylor (w/a)

Mr. Richard C. DeYoung, Director (w/a)

Office of Inspection & Enforcement gf U. S. Nuclear Regulatory Commission Washington, D. C.

20555 si i

8201250305 820120 PDR ADOCK 05000416 A

PDR Member Middle South Utilities System

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Figure 2.

Froth Impact Data From Figure 3 Scaled Up to Full Size Using " Modified Froude Scaling"

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