PRELIMINARY DESIGN REQUIREMENTS ARGONNE BOILING REACTOR (ARBOR) FACILITY. Revision I Page: 100 of 161
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GEOLOGICAL AND METEOROLOGICAL DESCRIPTION
OF THE NRTS SITE
Although the Snake River plain gives a flat appearance, the topog-
raphy is dune-like where the lava is mantled with soil. Many cinder buttes
rise above the surrounding terrain. Where soil cover is absent the land
surface is exceedingly rough. Soil is wind blown less.
Except in the immediate vicinities of craters, pressure ridges and
lava tubes, the basaltic lava rock which forms the central plain of the
NRTS site, in general, affords stable foundations for heavy structures. Most
of this rock has a high crushing strength and is nonplastic, although it is
parted universally into blocks from a foot to several feet in size. Ordinary
engineering techniques, coupled with test drillings to preclude the existence
of lava tubes or other cavernous openings at shallow depth, should suffice to
meet most foundation problems.
Excavation in the lava rock is, of course, more costly than in inco-
herent materials such as gravel. Although some parts are rough or craggy,
most of the area is relatively smooth, so that sites for individual structures
of a facility can be selected to minimize the volume of excavation required.
Surface wind flow in the vicinity of NRTS can be quite variable be-
cause of the surrounding mountainous territory. However, the prevailing
winds are usually in the quadrant from southeast through southwest, 45 to
55 per cent of the time. The strongest winds are approximately 50 to
60 miles per hour. The average surface wind speed is 8 to 10 miles per
hour with strongest winds occurring during the winter. The following fre-
quency of surface wind speeds in the area can be expected:
0 to 3 miles/hr 10 to 20 per cent
4 to 15 miles/hr 60 to 70 per cent
16 to 31 miles/hr 10 to 20 per cent
32 to 47 miles/hr ] to 2 per cent.
Other weather data for the Arco area are as follows:
Average Temperatures during months:
March 34* F ~
July 69* F
August 67* F
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Fromm, L.W.; Bernsen, S.A.; Bullinger, C.F. & Matousek, J.F. PRELIMINARY DESIGN REQUIREMENTS ARGONNE BOILING REACTOR (ARBOR) FACILITY. Revision I, report, July 15, 1957; Lemont, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1023272/m1/100/: accessed March 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.