Testing of a TLD and a direct ion storage (DIS) dosemeter for use as a personal dosemeter

The dosimetric performance characteristics of a TLD system (Harshaw Model 6600 with TLD-100 LiF-pellets) installed at the Personal Dosimetry Laboratory of the Finnish Centre for Radiation and Nuclear Safety have been tested Tests performed are based on the IEC Standard 1066. Along with the TLD system some novel direct ion storage (DIS) dosemeters (Rados Technology Oy) were also included in some of the tests and the results for DIS dosemeters were also compared with the performance criteria of IEC 1066. Direct comparison of the results between TLDs and DIS dosemeters is not made, as only a few of early stage design DIS dosemeters were available. The tests were made for photon radiation using the personal dose equivalent at 10 mm depth, i.e. H-p(10), as a testing quantity. Based on the recommendations of ICRU and ICRP and the results obtained the applicability of both types of dosemeters for use in an official personal dose monitoring system is assessed.