PRELIMINARY DESIGN REQUIREMENTS ARGONNE BOILING REACTOR (ARBOR) FACILITY. Revision I Page: 10 of 161
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The High Bay Area is 40 ft wide by 85 ft long and has
reinforced concrete load-bearing walls extending up to approximately 56 ft
above grade. The upper portion of this building is built around the support
structure for the 40-ton overhead bridge crane which serves the entire area.
Siding and roofing are of insulated, corrugated aluminum or are asbestos
Because of the 32-ft elevation of the reactor operating
floor, a 2000-lb capacity man lift will be required adjacent to the auxiliary
The 40-ton main bridge crane has the prime function
of handling the reactor vessel top closure head, pumps, and other equipment
in the active equipment pit. Precision controls are provided for all crane
motions. A special 1-ton capacity, 18-ft span bridge crane is attached to
the truss section of the roof to handle control rods, control rod drives, and
fuel elements in the vicinity of the reactor pit and storage pit.
The reactor is located in a pit near the center of the
main building. The pit floor is located 3J ft below grade. The pit is approxi-
mately 11 ft ID and 35 ft high. Ordinary concrete walls, 8 ft thick, encircle
the pit and form the primary reactor shield. The inner face is lined with a
water-cooled, 4-in, thick lead and steel cylinder. Cooling coils are also lo-
cated in the floor of the pit. These coils protect the concrete from excessive
heating from radiation and thermal effects. Thermocouple wells are located
in the shield walls to provide assurance of safe temperature in the concrete.
The bottom of the pit is water-tight and is connected to the active equipment
pit through a 6-in. cast iron drain loop seal to prevent gas leakage between
the two pit areas.
All piping passes through the reactor pit walls in in-
sulated water-cooled steel sleeves. Bellows seals designed to accommodate
both horizontal and vertical thermal expansion are provided on the outside
faces to prevent out-leakage of activated air (due to argon-41) within the pit.
A negative pressure of 1/2 in. of water will be maintained in the reactor pit
by means of a 500-cfm blower which draws air downward past the sides of
the vessel and discharges to a 100-ft high stack.
Provision is made for lead wires from thermocouples
on the surface of the reactor pressure vessel to be brought through the re- _
actor pit wall. Semi-gas-tight connections are required.
Eight nuclear instrument tubes are provided. Four
horizontal tangential tubes penetrate the reactor pit walls at the level of the
reactor core, and four vertical tubes extend from the main floor to a level
below the core center.
Large, removable, concrete-filled shielding segments
are arranged around the reactor vessel top cover flange shield assembly to
complete the upper biological shield and are supported by the operating floor.
They can also be moved about the operating floor to provide radiation
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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/m1/10/: accessed March 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.