Contamination

Contamination means the presence of a radioactive substance on a surface in quantities in excess of 0.4 Bq/cm 2 (1 105 Ci/cm 2) for beta and gamma emitters and low toxicity alpha emitters, or 0.04 Bq/cm 2 (1 106 Ci/cm 2) for all other alpha emitters.

Source

10 CFR § 71.4

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Scoping language

The following terms are as defined here for the purpose of this part. To ensure compatibility with international transportation standards, all limits in this part are given in terms of dual units: The International System of Units (SI) followed or preceded by U.S. standard or customary units. The U.S. customary units are not exact equivalents but are rounded to a convenient value, providing a functionally equivalent unit. For the purpose of this part, either unit may be used.

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