Radiation Protection Regulations

5 (1) For the purpose of keeping a record of doses of radiation in accordance with section 27 of the Act, every licensee shall ascertain and record the magnitude of exposure to radon progeny of each person referred to in that section, as well as the effective dose and equivalent dose received by and committed to that person.

(2) A licensee shall ascertain the magnitude of exposure to radon progeny and the effective dose and equivalent dose

• (a) by direct measurement as a result of monitoring; or

• (b) if the time and resources required for direct measurement as a result of monitoring outweigh the usefulness of ascertaining the amount of exposure and doses using that method, by estimating them.