الفهرس | Only 14 pages are availabe for public view |
Abstract The presence of large quantities of TENORM contaminated soil produced during the extraction and processing of crude oil at oil extraction sites higher than the radiological reference levels assigned by the international organizations may cause the exposure of workers at these sites to unusual radiation hazards. Therefore, it is a great importance to find suitable, effective, low cost methods to decontaminate this radioactively contaminated soil. Assessing the doses to the workers at these sites is playing a vital rule in exploring the radiation health risks due to workers exposure to TENORM radiation. In this respect, the leaching behavior of the radionuclides from the TENORM contaminated soil samples by different concentration of natural leaching solutions were studied. A series of batch experiments have been conducted to determine leaching behavior of the radionuclides onto the solutions and the different factors affecting the leaching process have been studied. The aim of the present work is to study the efficiency of soil washing technique using natural leaching solutions and to assess the radiological hazards for the workers at oil and gas production fields. The main areas of this study were: 1. Collecting samples of radioactively contaminated soil from different sites of some oil companies.2. A physical separation of the contaminated soil particles depending on the particle size. 3. Treatment of contaminated soil; a) Studying the factors affecting the treatment process. b) Treatment of the solutions resulting from the process of remediation of contaminated soil. 4. Elaboration of the obtained data with the possible predictions of the treatment of waste solutions. 5. Radiological dose assessment due to remediation of radioactively contaminated soils. a) Calculation of the occupational exposure by different exposure pathways. (internal and external). b) Calculation of the radiological hazards indices. c) Compare the estimated dose with international guides in order to recommending the suitable cleanup level. |