In what unit is the dose limit for non-radiation workers expressed?

The dose limit for non-radiation workers is expressed in millisieverts (mSv). This unit measures the biological effect of radiation on human tissue and is a practical metric used in radiation protection. Non-radiation workers, who may be exposed to radiation as part of their jobs but do not handle radioactive materials directly, have specific dose limits established to minimize their risk of radiation exposure.

Millisieverts reflect a fraction of a sievert, making it appropriate for typically lower levels of exposure encountered by these workers. This unit helps ensure that the exposure remains within safe levels according to regulatory standards and guidelines issued by organizations like the International Commission on Radiological Protection (ICRP).

The other units mentioned—Gray, Sievert, and Rem—serve specific purposes in radiation measurement, but they are not typically used to express dose limits for non-radiation workers in the same context. Gray measures the absorbed dose of radiation, Sievert is a larger unit that also accounts for biological effects, and Rem is an older unit that has been largely replaced by the metric system. Using millisieverts allows for clear communication and adherence to safety practices in occupational settings.