[Radiotoxicological surveillance of personnel occupationally exposed to the hazards of internal radiocontamination in a nuclear center].

At the Casaccia Nuclear Centre the personnel occupationally exposed to a risk of internal contamination from radioactive substances is controlled by means of periodic radiotoxicological analyses. About 30,000 analyses of natural uranium, enriched uranium, thorium, gamma emetters, plutonium, americium, etc. in urine have been carried out since 1962. In the case of accidental acute radiocontamination by inhalation, wound and ingestion, special control on urine, blood, feces, nasal swabs, etc. must be schedules. The results can be very useful to the medical staff in order to take the most suitable therapeutical measures or to calculate the body burden.