Ask X3What does 49 CFR 173.459 (Mixing of fissile material packages with non-fissile or fissile-excepted material packages) require?
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According to 49 CFR 173.459, you are allowed to mix fissile material packages with other types of Class 7 (radioactive) materials—such as non-fissile or fissile-excepted material packages—in any conveyance or storage location, provided that all of the following practical conditions are met:
* The Transport Index (TI) of any single package does not exceed 10.
* The Criticality Safety Index (CSI) of any single package does not exceed 50.
* The requirements outlined in §§ 173.441 and 173.457 are fully satisfied.
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