Investigation of Natural Radioactive Element Concentrations in Some Environmental Samples Addis Ababa, Ethiopia

Demissie, Habtamu

dc.contributor.advisor	Tesfaye, Tilahun(PhD)
dc.contributor.author	Demissie, Habtamu
dc.date.accessioned	2018-07-03T07:36:07Z
dc.date.available	2018-07-03T07:36:07Z
dc.date.issued	2016-06
dc.identifier.uri	http://etd.aau.edu.et/handle/123456789/5720
dc.description.abstract	Naturally occurring radioactive elements found in everywhere within us, such as in all rocks, soil, water, plants and animals in different content. They can emit alpha, beta and gamma radiations. Among that radon is the heaviest natural radioactive gas found in the earth surface in the form of ionizing radiation which contributes more than 50% of the exposure from the natural radiation environment. It is odorless, tasteless and colorless gas, and therefore cannot be detected by the human senses. Long term exposure of inhaled or ingested of these elements increases the risk of developing such diseases as lymphoma, kidney damage, lung cancer, born defects, bone cancer, cataract teeth fracture and diseases that affect the formation of blood, such as leukemia and anemia, With the motivation of the health hazards and to get the base line data on radon concentration this work were done. In the present work, the indoor radon concentration, the annual effective dose rate, the annual dose equivalent rate to the lung and the public risk were estimated in some houses of Addis Ababa using Ramon radon monitor 2.2. The mean annual effective dose rate and the mean annual equivalent dose rate to the lung in the studied area were 6.41mSv/y and 1.75393E-7Sv/y, respectively. Measurements of radon concentration, and effective dose rate were made for a number of 33 soil samples in Addis Ababa city. In this survey used time-integrated passive radon detectors, LR-115 Type II Solid State Nuclear Track Detector (SSNTD) technique to estimate the radon concentration from the soils of city. The mean results of radon concentrations from soil samples in the selected areas were found to be 38.38 ± 0.09Bq/m3, The present study represents the set of measurements for radon concentration levels in Akaki field well ground water using electronic radon meter (RAD7). The radon concentration in drinking water has been found to vary from 25 to 92Bq/m3 with an average value of 65.92Bq/m3 Key words: Annual effective dose, annual exposure, LR-115 type II detector, RAD7, Ramon radon monitor 2.2, radon Concentration, (solid state nuclear track detector) SSNTD	en_US
dc.language.iso	en	en_US
dc.publisher	Addis Ababa University	en_US
dc.subject	Annual Effective Dose	en_US
dc.subject	Annual Exposure	en_US
dc.subject	LR-115 Type II Detector	en_US
dc.subject	RAD7	en_US
dc.subject	Ramon Radon Monitor 2.2	en_US
dc.subject	Radon Concentration	en_US
dc.subject	(Solid State Nuclear Track Detector) SSNTD	en_US
dc.title	Investigation of Natural Radioactive Element Concentrations in Some Environmental Samples Addis Ababa, Ethiopia	en_US
dc.type	Thesis	en_US