Document Type : Technical Paper
Authors
1 Nuclear expert at the Atomic Energy Organization of Iran
2 Member of the faculty of the Nuclear Science and Technology Research Institute of the Atomic Energy Organization of Iran
Abstract
The aim of this study was to investigate the radiation resistance of thermal insulation made of basalt rock wool and the effect of gamma radiation on the heat transfer properties of the aforementioned insulations. Also, the alkalinity caused by caustic soda and water-soluble chloride of the insulations was measured before irradiation and the results were compared with the relevant standards to determine whether they are suitable for use in irradiated environments. To investigate the radiation resistance of these insulations, insulation samples were irradiated with gamma rays at a constant dose rate of 1 Gy/s according to GOST 25645.331-91 and cumulative doses of 100, 150, 200 and 250 kGy, and their thermal conductivity was measured at temperatures of 38 and 350 °C and compared with the thermal conductivity of unirradiated insulation. According to the results of this study and based on GOST 25645.331-91, it was determined that these insulations are resistant to radiation.
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