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Rotating Rack

Fluence Rates at 1 MWth

Thermal Neutron
Fluence Rate
(n cm-2 s-1)

Epi-thermal Neutron
Fluence Rate
(n cm-2 s-1)
Cadmium Ratio for Gold
3.0 x 1012
1.2 x 1011
2.6


Usable Dimensions

Aluminum TRIGA Tube for Rotating Rack: Inside Dimensions
Diameter: 0.9 inches maximum (This will be a tight fit)
Length:
4.0 inches

Polyethylene TRIGA Tube for Rotating Rack: Inside Dimensions
Diameter: 0.9 inches

Length:

3.2 inches

Encapsulation Requirements

Facility: Rotating Rack (Lazy Susan)
Physical Form of Material
Irradiation (MWh)
Minimum Containment
Primary
Secondary
Without Standard Cadmium Covers
Stable Solid
< 1
< 4 dram polyethylene vial
Not required
< 13
< 2 dram polyethylene vial
Not required
< 35
Flame-sealed quartz or sealed aluminum container
Not required
Liquid, Powder, or Other loose Solid Material
< 1
< 2 dram polyethylene vial
< 4 dram polyethylene vial
< 13
< 2 dram polyethylene vial,
< half full (Normally 2/5 dram polyethylene vial)
Normally 2 dram polyethylene vial; but 10 mL Nalgene liquid scintillation bag is OK when 2 dram vial is primary container
< 35
Flame-sealed quartz or welded aluminum container
2 dram polyethylene vial or sealed aluminum container. Vented 4 dram polyethylene vial with maximum use of 21 MWh
With Standard Cadmium Covers
Stable Solid
< 1
< 2/5 dram polyethylene vial, or aluminum foil wrap inside cadmium cover inside < 4 dram polyethylene vial
Not required
< 35
Flame-sealed quartz or sealed aluminum container
Vented 4 dram polyethylene vial to hold cadmium covers with maximum use of 21 MWh
Aluminum foil wrap inside cadmium cover inside sealed aluminum container
Not required
Liquid, Powder, or Other loose Solid Material
< 1
< 2/5 dram polyethylene vial
4 dram polyethylene vial
< 13
Flame-sealed quartz or welded aluminum container
Vented 4 dram polyethylene vial
< 35
Flame-sealed quartz or welded aluminum container
Sealed aluminum container

See also General Limitations on Experiments Performed
 

Radiation Center, 100 Radiation Center
Oregon State University, Corvallis, OR 97331-5903
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