Practices may be exempt from the reporting requirements in the EURATOM Basic Safety Standards if the relevant activity quantities or concentrations are below certain specified levels. This paper describes the methodology adopted for calculating those levels together with the results for selected radionuclides. The methodology was developed as a collaborative project co-ordinated by CEC. Briefly, a practice may be exempt from the requirement of reporting if the corresponding radiological risks are sufficiently low. Therefore, practices involving small amounts of radioactivity were identified and appropriate exposure scenarios developed representing the use, misuse and subsequent disposal of radionuclides. The calculated exposures were used to derived exempt quantities and concentrations by comparison with the appropriate dose criteria. (author). 16 refs, 6 tabs.
Mobbs, S; Harvey, M; Cooper, J;  Chapuis, A M;  Schneider, T;  Janssens, A 
- National Radiological Protection Board, Chilton (United Kingdom)
- CEA Centre d`Etudes de Fontenay-aux-Roses, 92 (France). Inst. de Protection et de Surete Nucleaire
- Centre d`Etudes sur l`Evaluation de la Protection dans le Domaine Nucleaire, Fontenay-aux-Roses (France)
- European Union, Brussels (Belgium)