The principal radiation source to which most workers are exposed is the naturally occurring radioactive gas radon. This tasteless, odourless and colourless radioactive gas, which comes from the ground, can accumulate in basement or ground-floor workplaces to unacceptable levels and become a health hazard. Another natural source, cosmic radiation, is the main source of radiation to which air crew are exposed. Relatively few workers are exposed to man-made sources of radioactivity from the use of X-rays, CT-scans or radioactive materials in the workplace.
In all cases, the RPII imposes stringent rules and regulations on employers to protect workers and the general public from the harmful effects of ionising radiation. In this section of our website you will find out more about the legal obligations of an employer, such as measuring and reducing radon levels, keeping records of doses to aircrew and licensing requirements for radioactive sources and irradiating apparatus.