PERFORMANCE OF THE NEW PHOTOLUMINESCENT GLASS DOSIMETRY SYSTEM AT THEIAEA INTERCOMPARISON 1990 91 FOR INDIVIDUAL MONITORING/

The KfK participated in the IAEA Intercomparison 1990/91 for individua l monitoring with the modem photoluminescent dosimetry (PLD) system us ing a one-element glass dosemeter and the fully automatic readout syst em Toshiba FGD-10, recently introduced in routine monitoring after rec eiving the pattern approval at the PTB. Beside the simultaneous indica tion of different dose quantities, the dosemeter offers the interpreta tion of the readout in terms of radiation quality and angle of radiati on. The properties of the PLD system are discussed on the basis of the intercomparison results presented in terms of personal dose equivalen t H(p)(10) as well as H(p)(0.07). The energy and angular response up t o angles of 60-degrees, and for rotational irradiation as well as the backscatter effect indicated by the flat glass dosemeter on the PMMA s lab and the Alderson phantom, have been investigated and compared with those found on water-filled sphere and slab phantoms. In the photon e nergy range from 20 keV to 1.3 MeV, the coefficient of variation was f ound to be 16% for all dose measurements between 0-degrees and 60-degr ees and 8% for a frontal direction of radiation incidence.