APPLICATION OF TL DOSEMETERS FOR DOSE DISTRIBUTION MEASUREMENTS AT HIGH TEMPERATURES IN NUCLEAR REACTORS

摘要

Al_(2)O_(3):Mg,Y ceramic thermoluminescence dosemeters were developed at the Institute of Isotopes for high dose applications at room temperatures. The glow curve of Al_(2)O_(3):Mg,Y exhibits two peaks--one at 250 deg C (I) and another peak at approx400 deg C (II). In order to extend the application of these dosemeters to high temperatures, the effect of irradiation temperature was investigated using temperature controlled heating system during high dose irradiation at various temperatures (20-100 deg C). The new calibration and measuring method has been successfully applied for dose mapping within the hermetic zone of the Paks Nuclear Power Plant even at high temperature parts of blocks.