期刊名称：Iranica Journal of Energy and Environment (IJEE)
印刷版ISSN：2079-2115
电子版ISSN：2079-2123
出版年度：2015
期号：3
页码：212-216
语种：English
出版社：Noshirvani University of TEchnology
摘要：Sources of radioactivity in the aquatic environment include naturally occurring radionuclides, fallout from the atmospheric and radioactive effluent from nuclear facilities that was released either accidentally or routinely. Depending upon the element and the chemical form, radionuclides may accumulate in bottom sediment or remain in the water column in the dissolved state. Marine organisms receive external radiation exposure from radionuclides in water and sediment. Radiological risk assessment was made for marine fish that are exposed to 137 Cs, 226 Ra, 228 Ra and 40 K along Manora channel Karachi coast of Pakistan using ERICA tool software. The ERICA tool is a software system that has a structure based upon the tiered ERICA integrated approach to assessing the radiological risk to terrestrial, freshwater and marine biota. The results were calculated using Tier 1 and Tier II assessments which are based on media concentration and use pre-calculated environmental media concentration limits to estimate risk quotients. If the sum of the risk quotients is
