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Abstract
In this study the assessment of indoor radon concentration in the air of Qaysare in Erbil city have been studied by using CR-39 Solid–State Nuclear Track Detector Technique. A total of 18 selected zones inside the suq have been selected to place the dosimeters. The average radon concentration was found to be 21.54 ± 8.017 Bq/m3 ,which is fortunately lower than the standard international limit from 200-600 Bq/m3 as recommended by ICRP, IAEA. The potential alpha energy concentration and annual effective dose have been calculated. A proportional relationship between the annual effective dose and radon concentration within the studied region has been certified.
Highlights
Solid State Nuclear Track Detectors (SSNTDs) are insulating solids both naturally occurring and man-made
The recorded values of radon concentration (Bq/m3) in different zones inside ErbilQaysare, Annual effective dose using the Working Level Month (WLM) units are presented in Table (1)
The calculated average Radon concentration was (21.54 ± 8.017) Bq/m3. This value is lower than the radon references level which ranges from 200-600 Bqm-3 as recommended by ICRP, IAEA.[25,26]
Summary
Solid State Nuclear Track Detectors (SSNTDs) are insulating solids both naturally occurring and man-made. International studies of radon indoors and in the workplace have shown that the dose contribution due to the inhalation of 220Rn and its short-lived decay products have been detected as a significant component of the total radon contribution. To measure both 222Rn and 220Rn gas concentrations in the environment, solid state nuclear track dosimeters are commonly used in dual chambered passive diffusion monitors. It is estimated that the annual effective dose by radon and its progeny from the inhalation of air is about 50% of natural public exposure to high levels of radon can cause lung cancer [4]. Interesting of radon dosimeters depended on the calibration factor, this factor has a wide range depends on the geometry of the used configuration and on many parameters such as; type of the sued detector via their etching conditions, detector efficiency and the dosimeter dimensions [16,17]
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