Evaluation of fluctuation of equivalent dose rate due to radionuclide radiation in buildings

Abstract

Radionuclide gamma radiation in building materials twist natural gamma field, therefore, dosimetry investiga¬tion of ionizing radiation of natural radionuclides was carried out near various building constructions. It was detected that equivalent dose rate of natural radionuclides increases exponentially (this empirical dependence stays in force to 10-15 meters from a building) while approaching a building under investigation. It was measured that buildings increase ionizing radiation approximately 1,5-2 times. Wooden buildings are an exception. They change natural background to 5 %. The values of equivalent dose rate in buildings are distributed according to Gaussian distribution. The measured equivalent dose rate is 1,5 times smaller in wooden houses then in block, silicate and ceramic bricks houses.