EURADOS intercomparisons for individual monitoring services: Results of the 2015 extremity dosemeter intercomparison for photon and beta radiations

In 2008 EURADOS (the European Radiation Dosimetry Group) started a programme of regular dosemeter intercomparisons to assist harmonisation of individual monitoring services (IMS). In 2015, IC2015ext for extremity dosemeters was coordinated by the Seibersdorf Labor GmbH/Austria. In total 72 different systems were tested. These were from 52 IMS from 21 countries and one international institution. Extremity dosemeters (ring, wrist/ankle and fingertip) were irradiated, dose quantity Hp(0.07), with photon and beta radiations. Irradiations were carried out by the accredited calibration laboratory VSL (Dutch national metrology institute/Delft). The irradiation plan was designed to allow the systems to be tested for linearity, energy response and angular response. The results show that, in general, extremity dosemeters perform better for photon than for beta radiations. 57% of systems showed at least one outlier, as defined in ISO-14146, revealing that there is still scope for improvement in the field of extremity dosimetry. This paper presents the results of IC2015ext and compares these results with IC2009ext.