Estimation of outdoor and indoor effective dose and ex-cess lifetime cancer risk from Gamma dose rates in Gonabad, Iran

Reza Jafari; Hassan Zarghani

doi:10.15392/bjrs.v5i3.312

Authors

Reza Jafari
Hassan Zarghani

DOI:

https://doi.org/10.15392/bjrs.v5i3.312

Keywords:

background gamma irradiation, indoor and outdoor environment, dose rate, annual effective dose and excess lifetime cancer risk

Abstract

Humans' background gamma irradiation in the indoor and outdoor environments is a major concern in the world. The study area was Gonabad city. Four stations and buildings for background radiation measurement of outdoor and indoor were randomly selected and the G.M detector (X5C plus) was used. All dose rates on display of survey meter were recorded and mean of all data in each station and buildings was computed and taken as measured dose rate of that particular station. The average dose rates of background radiation were 84.2 nSv/h for outdoor and 108.6 nSv/h for indoor, maximum and minimum dose rates were 88.9 nSv/h and 77.7 nSv/h for outdoor measurements and 125.4 nSv/h and 94.1 nSv/h for indoor measurements, respectively. Results show that the annual effective dose is 0.64 mSv, which compare to global level of the annual effective dose 0.48 mSv is high. Estimated excess lifetime cancer risk was 2.24×10^-3, indicated that it is large as compared to the world average value of 0.25×10^-3.

Views: 88
PDF Downloads: 206

Downloads

Download data is not yet available.

References

Shahbazi-Gahrouei D; Natural background radiation dosimetry in the highest altitude region of Iran; J Radiat Res. 2003 Sep; 44(3):285-7.

Hassan Zarghani, and Reza Jafari; Assessment of Outdoor and Indoor Background Gamma Radia-tion, the Annual Effective Dose and Excess Lifetime Cancer Risk in Birjand, Iran; Jundishapur J Health Sci. Inpress (Inpress):e40791.

F. Bouzarjomehri, M.H Ehrampoush. Gamma background radiation in Yazd province A preliminary report . IJRR. 2005; 3 (1) :17-20.

Shahbazi-Gahrouei D, Annual background radiation in Chaharmahal and Bakhtiari province; Iran. J. Radiat. Res., 2003; 1(2): 87 – 91.

Tavakoli MB; Annual radiation background in the City of Isfahan; Med Sci Monit. 2003 Jul; 9(7):PH7-10.

Dutreix MTJ, Wambersie A: Introduction to Radiobiology; Translated by Bewley DK, Burgess Sciences Press, UK, 1990.

Franklin AA, Daniel AF. Assessment of background Gamma radiation level in farmlands in ethiope east local government area of delta state, Nigeria. Nigerian J Physic. 2014;25(2 ):85-91.

United Nations Scientific Committee on the Effects of Atomic Radiation. "ANNEX B: Exposures from natural radiation sources, sub subsection IIC2." (2000).

United Nations. Scientific Committee on the Effects of Atomic Radiation. Sources and effects of ionizing radiation: sources. Vol. 1. United Nations Publications, 2000.

Rashed-Nizam, Quazi Muhammad, et al. "Assessment of radionuclides in the soil of residential are-as of the Chittagong metropolitan city, Bangladesh and evaluation of associated radiological risk." Journal of radiation research (2014): rru073.

Taskin, H., et al. "Radionuclide concentrations in soil and lifetime cancer risk due to gamma radio-activity in Kirklareli, Turkey." Journal of environmental radioactivity 100.1 (2009): 49-53.

International Commission on Radiological Protection. ICRP Publication 60: 1990 Recommenda-tions of the International Commission on Radiological Protection. No. 60. Elsevier Health Scienc-es, 1991.

Pashazadeh, Ali Mahmoud, et al. "Annual effective dose from environmental gamma radiation in Bushehr city." Journal of Environmental Health Science and Engineering 12.1 (2014): 1.

Basirjafari, Sedigheh, et al. "Assessment of outdoor gamma radiation dose rates in 49 cities of Gui-lan province, IRAN." Iranian Journal of Medical Physics 11.1 (2014): 168-174.

Gholami, M., S. Mirzaei, and A. Jomehzadeh. "Gamma background radiation measurement in Lorestan province, Iran." Iran J Rad Res 9 (2011): 89-93.

Assessment of Outdoor Gama Radiation Dose Rates in 49 Cities of Guilan Province, IRAN. Basir-jafari S; Aghayari S; Poorabas SM; Moladoust H; Asadinezhad M. Iranian Journal of Medical Physics. 2014;11(1):168-174.