Abstract
In this research, radon gas concentration was measured for a number of schools located in Diyala Governorate, Iraq, using the CR-39 detector, which is from Solid State Nuclear Track Detectors (SSNTDs). In a number of classrooms, the detector was set at a distance of 160 cm from the earth’s surface, for a period of time, these detectors were exposed (30 days). Where the results showed that the concentration of radon gas ranged from the lowest value which is equal to(8.528)Bq/m3 for the sample (D5) in (Alshumue) school to the greatest value, which was (50.395)Bq/m3 for the sample (A4) that was in (Alandalusia) school. , where the average radon gas concentration was equal to (25.257)Bq/m3, and the lung cancer cases per year per 106 person (CPPP) was also calculated, Where the results ranged from (3.873 to 22.885), with a rate equal to (11.470). After comparing the results obtained with the global results, it was found that they are much less than the permissible limits, which were recorded through ICPR (200-300) Bq/m3.
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