For the calculation of effective doses and equivalent doses, an order of the ministers responsible for radiation protection and labour defines, taking into account the effects of radionuclides on the various tissues and organs of the human body:
1° The calculation methods and weighting factors to be used ;
2° The conversion coefficient values for external exposure to ionising radiation;
3° The effective dose values incurred per unit of activity incorporated, for each radionuclide ingested or inhaled.
The weighting factors, the conversion coefficient values for external exposure to ionising radiation and the committed effective dose values per unit of incorporated activity take into account the values published and updated by the International Commission on Radiological Protection.