The provisions of this chapter apply to
1° Activities involving a risk of exposure of persons to ionising radiation due to the use of either an artificial source, whether substances or devices, or a natural source, whether natural radioactive substances or materials containing natural radionuclides, hereinafter referred to as nuclear activities ;
2° Actions required to prevent or reduce risks in exposure situations as defined in Article L. 1333-3. Only actions implemented as part of the decisions mentioned in 2° of Article L. 1333-3 are considered to be nuclear activities.
The procedures for applying this chapter are defined by regulation.