There are villages in Rafsanjan city (Kerman, Iran) that are
nearby or located on radioactive granite rock, unfortunately. In
this study, by measuring the 232Th, 238U and 40K
radioactive elements, the amount of radiation hazards caused by
radioactive granite rock. For the residents Deh Siahan village has
been investigated. The results show that the radiation hazard
parameters of Deh Siahan village are higher than the permissible
values announced by the UNSCEAR reports. For example, the
total effective dose rates of Deh Siahan village was determined to
be 0.30 ± 0.01 mSv/y. The calculated values of the excess
lifetime cancer risks (ELCR) for Deh Siahan village is
10.51 ± 0.03× 10-4. The average absorbed dose rate in
air for Deh Siahan village is 156.68 ± 4.01 nGy/h for the whole
studied samples, this value is about 285% of the maximum level
recommended by (ICRP60, 1991) to the public (1 mSv/y), so there is
high radiological risk for the peoples in those village.
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