ML17139A919

Forwards Hydrologic Engineering Branch Review of Proposed UHS Test Plan,Per Util .Plan Generally Acceptable.Suggestions for Improvement Discussed

ML17139A919
Person / Time
Site:	Susquehanna
Issue date:	07/22/1982
From:	Youngblood B Office of Nuclear Reactor Regulation
To:	Curtis N PENNSYLVANIA POWER & LIGHT CO.
References
NUDOCS 8208120326
Download: ML17139A919 (8)

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0 JUL 22 1982, Docket Nos.:

50-387/388 Mr. Norman H. Curtis Vice President Engineering and Construction-Nuclear Pennsylvania Power

& Light Company 2 North Ninth Street Allentown, Pennsylvania 18101

Subject:

Ultimate Heat Sink Tests for Susquehanna y.,O Document-Contr'ol (50-387/388)

NRC PDR

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MRushbrook RPerch

Attorney, OELD OIE The Hydrologic Engineering Branch of the NRC staff has reviewed the proposed plan for the spray pond tests provided by PP&L letter dated June 16,

1982, and find it generally acceptable.

However, some additional questions and comments are en-closed.

Suggestions have been made to help assure that the water loss measurements are taken and interpreted correctly.

Also, data from the tests should be presented in a form usable by the staff in its spray pond performance model (NUREG-0733). If you have any questions concerning this matter, please contact R.- Perch, NRC Project Manager.

Sincerely, OT'lRfhhl Sfging bye hi J. Xouagbiood

Enclosure:

As stated B. J. Youngblood, Chief Licensing Branch No.

1 Division of Licensing cc w/encl.:

See next page 8208i20326 820722 PDR ADOCK 05000387 P

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I Susquehanna Mr. Norman W. Curtis Vice President Engineering and Construction Pennsylvania Power 5 Light Company Allentown, Pennsyl vania 18101 ccs:

Jay Silberg, Esquire Shaw, Pittman, Potts 8 Trowbridge 1800 M Street, N.

W.

Washington, D. C. 20036 Edward M. Nagel, Esquire

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General Counsel and Secretary Pennsylvania Power 8 Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Mr. William E. Barberich Nuclear Licensing Group Supervisor Pennsylvania Power 8 Light Company 2 North Ninth Street Allentown, Pennsylvania 18101

. Mr. G. Rhodes Resident Inspector P. 0. Box 52 Shickshinny, Pennsylvania 18655 Gerald R. Schultz, Esquire Susquehanna Envi roanental Advocates P. 0. Box 1560 Wilkes-Barre, Pennsylvania 18703 Mr. E. B. Poser Project Engineer Bechtel Power Corporation P. 0.

Box 3965 San Francisco, California 941 19 Dr.. Judith H. Johnsrud Co-Director Environmental Coalition on Nuclear Power 433 Orlando Avenue State College, Pennsyl vania 16801 Mr. Thomas M. Gerusky, Director Bureau of Radiation Protection Resources Commonwealth of Pennsyl vani a P. 0.

Box 2063 Harri sburg; Pennsyl vania 17120 "C

Ms. Colleen Ma.rsh P. 0.

Box 538A, RD ¹4 Mountain Top, Pe nnsy1 va ni a 18707 Mr. Thomas J.

Hal ligan Correspondent The Citizens Against Nuclear Dangers P. 0. Box 5

Scranton, Pennsyl vania 18501 Mr. J.

W. Millard Project Manager Mail Code 395 General Electric Company 175 Curtner Avenue San Jose, California 95125 Robert W. Adler, Esquire Office of Attorney General 505 Executive House P. 0. Box 2357 Harri sburg, Pennsyl vania 17120

Hydrologic Engineering Section Review, of Ultimate Heat Sink Test'Plan Susquehanna Steam Electric Station Units 1 and 2

Docket Numbers:

50-387/388 The reported plan is generally adequate, but several suggestions have been-made for its improvement:

1.

Previous spray pond and cooling pond tests under closely-controlled conditions have demonstrated that the change in pond water level is not in itself an accurate indicator of water loss.

Since in most cases the water level change will be only a few inches during a test, thermal expansion or contraction in the pond can cause a serious error unless the pond is isothermal.

Draft NUREG-0858 points to this problem in Chapter 6.3.

Note also references 12 and 14 to this report.

It would be best to use some sort of measuring device which would be insensitive to the thermal expansion of water, or at least to closely monitor the temperatures in the stilling wells and tubes for the hook gages.in order to correct. for thermal expansion.

2.

Differing surface'eat transfer formulas require wind speeds measured at different heights above the water surface.

The NRC spray pond model uses a

2 meter height.

Please measure wind speeds at this height, if

possible, or provide a range of heights from which a 2 meter value can be interpolated.

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\\ 3. It is not entirely clear from the test plan report how the evaporation pans will be employed to provide the necessary data on evaporative losses.

Please clarify the following:

a)

What assurances are there that the water in the pans will be at the same temperature as the pond water?

b)

Mill drift from the sprays or wind waves affect the water loss measurements?

c)

Mill pan coefficients or other formulas be used to interpret the evaporative loss?

4.. In'rder for the staff to use the pond results for model confirmation,'.

please provide the data from the test in the following way:

At regular intervals (preferably 1/2 hour) provide:

a.

time of day and'lapsed time b.

solar incident, and/or net radiation c.

cloud cover if available (tenths) d.

ambient wind speed away from pond area (2 meters or range of heights) e.

wind direction f.

wet bulb temperature (2 meters or range of heights) g.. dry bulb temperature (2 meters or range of heights) h.

flow rate through sprays heat loads j.

barometric pressure

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5.

Since you used Harrisburg Airport data in your model tests, provide data from this station for the same period of the tests in order to correlate'he data bases.'.

The final report should include measurements of drop size distributions which have been taken.

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