Mandatory radon measurement in South Africa
Unlike many European and North American countries, there is hardly no directly orientated radon legislation in South Africa. The National Nuclear Regulator (NNR) has indeed not published any official national guidelines or action plan especially dedicated to radon.
However, measuring occupational ionizing radiation is mandatory in some specific workplaces throughout the country. It mainly concerns mines that are facing NORM issues and some facilities handling with radioactive materials. As radon taking a large part in NORM, measuring radon exposure in facilities with activities authorized according to section 22 of the NNR Act are due to measure radon in order to determine the global dose the workers and visitors are exposed to in those environments.
Globally, NNR Act requires occupational radiation dose for workers concerned by section 22 authorized facilities and activities not to overpass 20mSv per year over a 5 years period while not being superior to 50mSv in one year.
Regarding visitors, the limit is set to 1 mSv per year.
Apart from this, there is no other regulation regarding radon in South Africa to date.