PROGRESS IN PHOSPHATE-GLASS DOSIMETRY - EXPERIENCES AND ROUTINE MONITORING WITH A MODERN DOSIMETRY SYSTEM

The modem, commercially available PLD system type Toshiba FGD-10, with flat glass dosemeters and a full automatic read-out system, type test ed at the PTB, allows for the measurement of H(p)(10) down to photon e nergies of 10 keV and, in addition, the indication of radiation qualit y below 100 keV as well as the direction of the radiation incidence. D ue to the intrinsic pre-dose subtraction, doses of 0.03 mSv up to 8 Sv can be measured with a random uncertainty of 10%. The paper discusses long-term monitoring results on a monthly and yearly basis. Experienc es in routine monitoring as well as intercomparison experiments, showe d an excellent long-term stability of the system with an accuracy of m easurement in the order of 1% not previously obtained with other solid state dosimetry systems. The system allows for a reliable routine eva luation also under unfavourable readout and environment conditions.