Quantity Limits And Packaging

The quantity or specific activity of a radioactive material determines the packaging requirements. The regulations use A1 and A2 values as points of reference for quantity limitations for every radionuclide. Every radio-nuclide is assigned an A1 and an A2 value. These two values, in curies, are the maximum activity of that radio-nuclide that may be transported in a Type A package (Figure 11.28.3). Table 11.28.2 gives examples of A1 and A2 values for some typical radionuclides. Type B

quantities (Figure 11.28.4) are defined as exceeding the appropriate A1 or A2 value. Type B packages, highway route controlled quantities, and fissile radioactive materials are additionally controlled by the NRC regulations in 10 CFR Part 71.

Waste Material in Plastic Bag

Liquid in Bottle Within Metal Container

Liquid in Bottle Within Metal Container

Powder in Glass or

Plastic Bottle

Gas in Cylinder

FIG. 11.28.2 Normal Forms of Radioactive Materials 49 CFR §173.403(s). Normal form materials may be solid, liquid or gaseous and include material that has not been qualified as special form. Type A Package Limits are A2 Values.

FIG. 11.28.2 Normal Forms of Radioactive Materials 49 CFR §173.403(s). Normal form materials may be solid, liquid or gaseous and include material that has not been qualified as special form. Type A Package Limits are A2 Values.

Fiberboard Box Wooden Box Steel Drum

Typical Schemes

Dot Specification 7A Type A Package

Fiberboard Box Wooden Box Steel Drum

Typical Schemes

Dot Specification 7A Type A Package

FIG. 11.28.3 Typical Type A Packaging. Package must withstand normal conditions (49 CFR §173.465) of transport, without loss or dispersal of radioactive contents.

Massive Solid Metal

High Integrity Encapsulation as a Sealed Source

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