1. Sizes and Units - Biological mechanisms of the action of the ionizing radiations
2. Acute effects of an accidental irradiation
3. Radio-induced cancers
4. Hereditary radiation effects
5. Effects of the in utero irradiation
6. Legislation : basic standards: principles of operational protection against radiation
7. Practical operations: use of detectors in situation of routine; dosimetry of the workers: visits of the installations of physical control