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Assessment of Internal Exposure to Radon in Schools in Karbala, Iraq |
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PP: 25-34 |
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doi:10.18576/jrna/040103
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Author(s) |
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Abdalsattar Kareem Hashim,
Sara Salih Nayif,
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Abstract |
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| In this study, radon concentrations were measured in the air of nineteen schools, including six secondary schools and thirteen primary schools in Karbala city using the passive accumulative technique, which includes solid-state nuclear track detectors LR-115 type II and CN-85 By Kodak, pathe, France with thickness 12 micrometers. Radon concentrations ranged from 13.140±4.11 𝐵𝑞/𝑚3 to 38.439±6.79 𝐵𝑞/𝑚3 and ranged from 13.842±2.35 𝐵𝑞/𝑚3 to 36.867±4.28 𝐵𝑞/𝑚3 with an average value(25.408±4.54 and 25.317±3.15) 𝐵𝑞/𝑚3 in closed dosimeters for LR-115 and CN-85 detectors respectively, also in open dosimeters ranged from 15.719±7.30 𝐵𝑞/𝑚3 to 51.825±28.26 𝐵𝑞/𝑚3 and varied from 17.269±3.90 𝐵𝑞/𝑚3 to 46.872±4.74 𝐵𝑞/𝑚3 with an average of (36.253±5.23and 34.732±4.36) 𝐵𝑞/𝑚3 in LR-115 and CN-85 detectors, respectively. The mean of annual effective dose was 0.028 𝑚𝑆𝑣/𝑦 and 0.020 𝑚𝑆𝑣/𝑦 for closed dosimeters , whereas in open dosimeters the mean of annual effective dose was 0.048 𝑚𝑆𝑣/𝑦 and 0.032 𝑚𝑆𝑣/𝑦 in LR-115 and CN-85 detectors, the mean value of lung cancer cases per year per million person was found 0.859 and 0.580 in open dosimeters ,and the mean was 0.496 and, 0.366 in closed dosimeters of LR-115 and CN-85, respectively. The results of this study were lower than the normal limits of radiation (200-300) 𝐵𝑞/𝑚3according to ICPR |
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