Derived investigation level

A pre-set level of a measurable quantity derived from the investigation level or another primary level. A DIL can be set for any operational parameter related to the individual or to the working environment. For individual monitoring of exposure to intakes of radionuclides a DIL is most likely to relate to a measured body or organ/tissue content an activity level in excreta or an air concentration measured by a personal air sampler. (see also investigation level).

(ICRP Publication 130, 2015)

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