Measurement of Radionuclides Transport Parameters for Soil Samples from Anarak Radioactive Waste Disposal Site by Collimated Gamma Ray Spectroscopy

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Kazemi, Zahra | 2019

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 52544 (46)
University: Sharif University of Technology
Department: Energy Engineering
Advisor(s): Samadfam, Mohammad
Abstract:
The Iranian Nuclear waste management Company is responsible for the safe disposal of the low-level radioactive waste resulting from the various processes of the nuclear fuel cycle and other radioactive-related activities. The safety assessment of waste disposal requires the measurement of transport parameters of radioactive nuclides in the soil around the disposal site.In this project, concentration profiles within a column which filled with Anarak Radioactive Waste Disposal Site soil were obtained using collimated gamma scanning method. Concentration profiles were measured at two different times (69 and 138 hours after injection). Then, using STANDMOD software, the equilibrium advection-dispersion equation was fitted to the experimental data and the transport parameters R ( Retardation Factor) and D (Dispersion) were extracted. In the first and second measurements, the R values were 1.06 and 1.03, respectively, which shows very good agreement. The distribution coefficient (kd) of both measurements shows a very small value
Keywords:
Column Experiment ; Nuclear Waste ; Advection-Dispersion Equation (ADE) ; Distribution Ratio ; Cobalt ; Radioisotops ; Radioisotope Tracer ; Reatardation Factor

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