Measurement of Radon concentration in College of Education, Ibn Al- Haitham buildings using Rad-7 and CR-39 detector

In this present work, radon concentration was measured indoor buildings in the College of Education for Pure Sciences / Ibn AlHaitham University of Baghdad using Rad-7and CR-39 detector for compare, because this college is one of the old buildings, also there are some closed places inside it, where increase radon gas in these places will cause to health hazard. Rad-7 monitor is used to measure the radon concentration in three ways in the air, water and soil. In this work, Rad-7 was measured radon concentration in the air which is direct method with compared CR-39 detector which considers passive method of measurable. Have been measured for half an hour in every room using Rad-7 with appropriate conditions for measurement, where the device was recorded higher reads in two samples Fl and F2, the values were (59.6 Bq/m(3)) and (48.2 Bq/m(3)) respectively and the lowest read in the sample (El), the value was (5.43Bq/m(3)). When using CR-39 detectors were placed two detectors of CR-39 in every room for (30) days, the results were (445.868Bq/m(3)) and (436.791Bq/m(3)) respectively because these places without ventilation and very old buildings and the lowest read in the sample (Cl), the value was (17.412Bq/m(3)) because these places were open and with high ventilation. All results that recorded by using Rad-7 monitor were within the range allowed globally recorded by (ICRP) but the results of CR-39 were within the range allowed globally recorded by (ICRP) which were (200-300)Bq/m(3) except two samples Fl and F2. (C) 2019 The Authors. Published by Elsevier Ltd.