ML20062E994

Forwards Request for Addl Info Re Pressure & Temp Profiles Outside Containment as Part of Equipment Environ Qualification Review to Perform Calculations for Pipe Breaks Outside Containment.Info Requested within 30 Days

ML20062E994
Person / Time
Site:	Prairie Island
Issue date:	07/29/1982
From:	Clark R Office of Nuclear Reactor Regulation
To:	Musolf D NORTHERN STATES POWER CO.
References
NUDOCS 8208110088
Download: ML20062E994 (4)

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JUL 2 91982 Pflocket File NRC PDR Local POR ORB #3 Rdg Docket Nos. 50-282 D. Eisenhut and 50-305 OELD I&E D. Dilanni PMKreutzer-3 Mr. D. M. "usol f RAClark Nuclear Support Services Department J. Calvo Northern States Power Company NSIC 414 Nicollet Mall - 8th Floor Ar.RS-10 "inneapolis, Minnesota 55401 J. Hel temes Pear "r. "usol f:

Enclosed is a fomal request for additional information related to the Equipment Environmental f)ualification Review for the Prairie Island Nuclear Generating Plant Unit Hos. 1 and 2 This information is needed by the staff to perform calculations related to the issue of pipe breaks outside containment.

If scme or all of this information has been sub-mitted by Northern State Power Company, you need only reference the date of your submittal.

He request the infonnation be provided within 30 days from the date of your receiving this letter.

The information requested in this letter affects fewer than 10 respondents; therefore OM clearance is not required under P.L. 96A11 Sincerely, Original signed bn Pobert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing

Enclosure:

As stated cc: See next page 8208110088 820729 PDR ADOCK 05000282 P

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Gerald Charnoff, Esquire Shaw, Pittman, Potts and Trowbridge 1800 M Street, N.W.

Washington, O. C.

20036 Mr. Louis J. Breimburst Mr. R. L. Tanner Executive Director County Auditor Minnesota Pollution Control Agency Red Wing, Minnesota 55066 1935 W. County Road B2 Roseville, Minnesota 55113 U. S. Environmental Protection Agency Federal Activities Branch The Environmental Conservation Library Region Y Office Minneapolis Public Library ATTN:

Regional Radiation 300 Nicollet Mall Representative Minneapolis, Minnesota 55401 230 South Dearborn Street Chicago, Illinois 60604 Mr. E. L. Watzl, Plant Manager Prairie Island Nuclear Generating Plant Northern States Power Company Route 2 Welch, Minnesota 55089 Jocelyn F. Olson, Esquire Special Assistant Attorney General Minnesota Pollution Control Agency 1935 W. County Road B2 Roseville, Minneosta 55113 U.S. Nuclear Regulatory Commission Resident Inspectors Office Route #2, Box 500A Welch, Minnesota 55089 Region &l Administrator Nuclear Regulatory Commission, Region III Office of Executive Director for Operations 799 Roosevelt Road Glen Ellyn, Illinois 60137

REQUEST FOR INFORMATION FOR PRESSURE AND TEMPERATURE' PROFILES OUTSIDE CONTAINMENT FOR PRAIRIE ISLAND UNIT NOS.1 & 2 Provide the basis, assumptions and an analysis of a typical pipe break location (for example, auxiliary feedwater pump room for PWRs) that includes the following information:

1.

Vith respect to the pipe to be broken, provide the following:

a.' Type of fluid (water or steam);

3.

Temperature; c.

Pressure; d.

Source of the fluid; e.

Flow rate (or assumed flow rate);

f.

Pipe internal diameter; g.

Wetted perimeter of the break (feet);

h.

Total pipe internal diameter;

i. Exit flow drea, if the break was not 'n the pipe, just described above;

j. Area of flow restriction, if any; k.

Differential elevation from the source to the pipe break; l.

Total flow resistance (only if the fluid is water);

m.

Means to stop fluid flow (none, gate valve, globe valve, etc.); and n.

If item 1.m above is a valve, then the valve's open throat area, full open flow coefficient, valve closure time, and delay time until initiation of valve closure, 7

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! 2 With respect to the compartments being analyzed, provide the following:

a.

Number of compartment analyzed; and b.

For each compartment:

i.

initial temperature ii.

initial pressure iii.

initial humidity iv.

free air volume (cubic feet) v.

number of vents and vent areas (square feet) for each vent; and vi. minimum pressure to initiate flow to the next compartment (psia).

3.

Provide all assumptions used, including but not limited to the:

a'.

Orifice coefficient for the "end effects" for the discharged fluid; and b.

Fluid expansion factor.

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