Letter from Carey H. Bostian to Deans, Directors of Research, and Department Heads
Typescript
2 pp.
January 7, 1954
MurNBcomparison000053



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ITEM
LOS ALAMOS PAGE
REFER-
ENCE
N. C. STATE PAGE
REFER-
ENCE
COMMENTS
Active
Material
14 % isotopic concentration
Uranyl nitrate aqueous so-
lution

870 grams, 13.5 liters
2 80-90% isotopic concentration
Uranyl sulfate agueous so-
lution

915 grams, 14.36 liters
22-24 UO2SO4 used in low power boiler;
later choice of UO2(NO3)2 based
on ease of ether extraction pro-
cess
. Higher U-235 concentration
chosen to minimize fuel material.
Shape of Core
and Material of
Construction
Spherical, 1 foot diameter
Stainless steel
2 Cylindrical, 27.2 cm O.D.,
27.0 cm high
Stainless steel
24 Cylindrical shape more con-
venient
construction.
Power level &
Cooling method
5.5 kw (later 10 thru 25)
6 turns of 1/4" I.D. stain-
less
steel
157" total length, helix
Flow rate 50cc/sec.
2
17;Fig4
10 kw
3 Helical coils of 1/4" I.D.
stainless steel
30 ft. total length
Flow rate 3 gallons/min.
20
20;Fig6
Equivalent cooling system.
Entrances "Glory hole" (horizontal) 16
18
31
Re-entrant tube (vertical)
Level indicator; contact
recorded electrically
Thermocouples
Sampling line
36
42
30
41
 
Tamper
Reflector
Be O shell; graphite
(24" x 24" x 27"); (60" x 48"
x 60")
20
Fig2,6,7
Graphite
16" thick on all sides,
4" x 4" bars.
  BeO not use in N. C. State
reactor because of expense.
Drip pans .020" stainless steel pan be-
tween
BeO and graphite
3/16" lead pan below graphite
20
Fig.7
Aluminum and stainless steel
concentric envelope
38.3 cm I.D. close fitting,
but shell filled with
graphite.
- - - - -
Secondary flat catch basin,
below graphite
- - - - -
Tertiary lead, shild
24
Fig.7





27


28
Equivalent
Excess
Reactivity
0.0150/units? 35-36 0.0165 23  
*L.A. 394  **Program Administration and Installation Design of the Nuclear Reactor


[page 2]


ITEM
LOS ALAMOS PAGE
REFER-
ENCE
N. C. STATE PAGE
REFER-
ENCE
COMMENTS
Shielding 8" pier of Bi between tamper
and thermal column
1/32" Cd, 4" Pb, 5 ft. concrete
21

Fig.10b
4"/2" lead-additional graphite out-
side

6 ft concrete.
Cd and 4" lead on thermal column
38
17
 
Thermal
Column
5' cubical pile of graphite
Cd curtain 4' from front
20 Several feet of graphite, with
4 exposure ports
39
Fig.8
 
Control and
Safety Rods
Two regulating shims, on con-
trol
rod, one safety rod
Cadmium absorber
Total equivalent 160g U235
Magnetic coupling\??
21 Two boron-filled tubes, one
control, one safety
Cd sheet .02" x 2" wide shim
for regulation
Total grams 170
Magnetic coupling
28  
Instruments Galvanometers activated by two
kinds ionization chambers
(BF3, U-235)
Three detectors that drop con-
trol
and safety rods
27-30
Fig20
Fission chambers (6 in number)
Three chambers will trip safety
devices
Additional scintillation
detectors
30  
Radioactive
Products
50cc/sec at air flow into
space above solution by 1/4"
tube; solution catcher,
platinum gauze to prevent
back explosion. 200 ft. tube
passage to silica gel drier,
200 + 1800 ft. tube to a
distant point.
Stack release.
18 Dilution of gases, hydrogen and
oxygen recombined, residual
gas held in storage tank for
decay, dilute final gas with
large volumes of air and
release from tall stack.
43 Only new features are the
combination of gases and the
holding for decay products.
Function Activations of material by
neutron irradiation in center
of sphere or thermal column
Fission spectrum source of
neutrons
Transmission and scattering ex-
periments
42 Preparation of radioactive
samples
Irradiation of animals
Neutron experiments
Instruction in Nuclear
Engineering
   
Decontami-
nation
of
boiler solution
Drain and store solution in
tank of underground vault
Ether extraction of uranium
12 Pump out to lead enclosed traps,
or remove entire reactor inside
lead plus aluminum shield, and
ship to Oak Ridge. No processing
of solution at Raleigh.