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Active Methods & Instruments for Personal Dosimetry of External Radiation: Present Situation in Europe and Future Needs

Active personal dosemeters (APD) are progressively more and more used in radiation protection. Despite their success APDs are relatively new devices for individual monitoring of workers. Interesting characteristics of APDs compared to passive dosemeters are: instant or direct reading, data transfer to and from computer network, lower dose sensitivity, audible alarms and dose memory options for distant readout A wide range of APDs for gamma and beta are commercially available, their performances are in general sufficient for radiation protection. Recently also commercial neutron devices appeared on the market. In modern radiation protection APDs are strictly necessary operational tool to satisfy the ALARA principle.