Art. 1 Purpose and scope
1 For the protection of people and the environment against ionising radiation, this Ordinance regulates:
- for planned exposure situations:
- licences,
- public exposure,
- unjustified activities,
- medical exposure,
- occupational exposure,
- handling of radiation sources,
- handling of radioactive waste,
- prevention and management of failures;
- for emergency exposure situations: preparedness and management;
- for existing exposure situations: management of radiological legacies, radon, naturally occurring radioactive material and long‑term contamination following an emergency;
- training and continuing education of persons handling ionising radiation or radioactivity;
- supervision and enforcement;
- advisory activities of the Federal Commission for Radiological Protection (KSR).
2 It applies to all exposure situations for artificial and for natural ionising radiation.
3 It does not apply to:
- a.
- exposures to radionuclides naturally present in the human body;
- b.
- exposures to cosmic radiation; it does, however, apply to exposures of aircrew to cosmic radiation;
- c.
- aboveground exposures to radionuclides present in the undisturbed earth's crust.




is the mean energy imparted to matter of mass dm by ionising radiation. The SI unit for absorbed dose is joule per kilogram (J/kg), and its special name is gray (Gy).
is the mean total energy imparted in a tissue or organ T, and
is the mass of that tissue or organ.







Ratio of radii: 1 : 1,5 : 5