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The Diffusion of Tc-99 in Beishan Granite-Temperature Effect
Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China; North China Electric Power University, Beijing, China
Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China; North China Electric Power University, Beijing, China
Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
- 1 Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China; North China Electric Power University, Beijing, China
- 2 Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
- 3 Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
- 4 Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China; North China Electric Power University, Beijing, China
- 5 Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
- 6 Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
- 7 Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
- 8 Beijing National Laboratory for Molecular Science, Radiochemistry & Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
World Journal of Nuclear Science and Technology·Volume 03 (2013)·Pages 33–39·Published 29 January 2013·DOI10.4236/wjnst.2013.31006
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Abstract
In the safety assessment of a potential site for high-level radioactive wastes (HLW) disposal, the investigation on the geochemical behaviors of key radionuclides with the possibility for releasing from the potential repository is an important aspect. Due to the high mobility of technetium under most repository conditions, lots of research works were performed to investigate the diffusion of technetium in different potential rocks. In spite of these studies, there remains a lack of data addressing temperature effects. In this paper, the diffusion of 99 Tc in Beishan granite at temperatures from 25℃ to 55℃ was studied with laboratory small scale diffusion devices. The experimental data were fitted with a finite difference scheme to get the effective diffusion coefficient (De) of . The results indicated that the relationship of De with temperatures could be described as the modified Stokes-Einstein equation, and the formation factor of Beishan granite was constant in the temperature range of 25℃ - 55℃ with the value of (3.91 ± 1.77) × 10 -4 .
KeywordsDiffusionTechnetiumBeishan GraniteTemperature Effect
- D. G. Bennett and R. Gens, “Overview of European Concepts for High-Level Waste and Spent Fuel Disposal with Special Reference Waste Container Corrosion,” Journal of Nuclear Materials, Vol. 379, No. 1-3, 2008, pp. 1-8. doi:10.1016/j.jnucmat.2008.06.001
- H. Hokmark and B. Falth, “Thermal Dimensioning of the Deep Repository,” 2003, p. 83.
- T. Tarandi, “Calculated Temperature Field in and around Repository for Spent Nuclear Fuel,” KBS Teknisk Rapport, Vol. 83, No. 22, 1983, p. 32.
- B. B. Looney and R. W. Falta, “Vadose Zone: Science and Technology Solutions,” Battelle Press, Columbus, 2000.
- J. R. Boulding and J. S. Ginn, “Practical Handbook of Soil, Vadoze Zone and Groundwater Contamination, Assessment, Prevention, and Remediation,” A. F. Lewis, New York, 2004.
- F. G. Sanchez, L. R. Van Loon, T. Gimmi, et al., “SelfDiffusion of Water and Its Dependence on Temperature and Ionic Strength in Highly Compacted Montmorillonite, Illite and Kaolinite,” Applied Geochemistry, Vol. 23, No. 12, 2008, pp. 3840-3851. doi:10.1016/j.apgeochem.2008.08.008
- A. V. Simonyan, H. Behrens and S. Dultz, “Diffusive Transport of Water in Porous Feldspars from Granitic Saprolites: In Situ Experiments Using FTIR Spectroscopy,” Geochimica et Cosmochimica Acta, Vol. 73, No. 23, 2009, pp. 7019-7033. doi:10.1016/j.gca.2009.08.031
- E. O. Holzbecher, “Modeling Density-Driven Flow in Porous Media: Principles, Numerics, Software,” Springer, Berlin, 1998. doi:10.1007/978-3-642-58767-2
- D. A. Nield, “Convection in Porous Media,” Springer, Berlin, 2006.
- M. M. Krol, B. E. Sleep and R. L. Johnson, “Impact of Low-Temperature Electrical Resistance Heating on Subsurface Flow and Transport,” Water Resources Research, Vol. 47, No. 5, 2011.
- G. Q. Xu, J. Wang, Y. X. Jin, et al., “Progress in Site Selection for China’s High Level Radioactive Waste Repository,” Secondary Progress in Site Selection for China’s High Level Radioactive Waste Repository, 1995.
- M. Z. Min, X. Z. Luo, J. Wang, et al., “Sorption Behavior of U(VI), U-234(VI) and U-238(VI) onto Fracture-Filling Clays in Beishan Granite, Gansu: Application to Selecting the Site of High-Level Radwaste Repository in China,” Science in China Series D: Earth Sciences, Vol. 48, No. 10, 2005, pp. 1649-1655. doi:10.1360/03yd0475
- Z. X. Sun and Z. S. Zhang, “Geochemical Modeling of Water-Granite Interaction in Beishan Area, NW-China,” Geochimica et Cosmochimica Acta, Vol. 72, No. 12, 2008, pp. A917-A917.