Monitoring of radiation dose distribution utilizing RPL in glass dosimeter — Its application to radioactive emergency sensing-

In the decommissioning of the nuclear power plant, especially, for decontamination by radioactive substances caused by 2011 Fukushima nuclear power plant accident has affected the reconstruction after the earthquake, the dose evaluation and validation of the decontamination effect is very important. In order to prepare a novel passive-type dosimeter system which can applied to radiation dose monitoring and visualization of two dimensional distribution of ionizing radiation in contaminated area, we try to develop a beads-type and a sheet-type glass dosimeter utilizing radio photo luminescence (RPL) phenomenon in Ag
⁺
-doped phosphate glass. It is confirmed that the beads-type glass dosimeter with a diameter of about 50μm exhibits an intense RPL. It is found that the sheet-type glass dosimeter which is made of the beads-type glasses is useful for monitoring of radiation dose in wide dose range and visualization of dose distribution, for radioactive emergency monitoring.