Sample size limitations  
Content must fit in standard 2/5 dram polyethylene tube

 

Encapsulation Limitations

Cadmium Covers

Physical Form of Material

Integrated Power
(MWh)

Minimum Containment

Primary

Secondary

Without

Standard

Cadmium

Covers

Stable

Solid

< 25

Polyethylene Vial

Not required

25-35

Flame-sealed quartz or sealed container

Not required

> 35

Flame-sealed quartz or sealed container

Not required but carrier to be an aluminum TRIGA tube

Liquid,

Powder or Other Loose Solid Material

< 25

≤2 dram polyethylene vial

≤4 dram polyethylene vial

> 25

Flame-sealed quartz or welded aluminum container

Approved sealant on an aluminum TRIGA tube

With

Standard

Cadmium

Covers(2)

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(3)

≤1

≤2/5 dram polyethylene vial inside Cd container

4 dram polyethylene vial outside the Cd cover

Footnote:

(1)        The standard carrier for all LS irradiations shall be the poly TRIGA Tube.

(2)        The standard cadmium cover referenced in Table 18.1 consists of a small cadmium box and cover which is capable of holding a conventional 2/5 dram or 2/27 dram polyethylene vial.

(3)        Cd covered irradiations exceeding 1 MWhr should be conducted within the CLICIT.