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논문 상세정보

Equilibrium Concentration of Radionuclides in Cement/Groundwater/Carbon Steel System

Abstract

Equilibrium concentrations of major elements in an underground repository with a capacity of 100,000 drums have been simulated using the geochemical computer code (EQMOD). The simulation has been carried out at the conditions of pH 12 to 13.5, and Eh 520 and -520 mV. Solubilities of magnesium and calcium decrease with the increase of pH. The solubility of iron increases with pH at Eh -520 mV of reducing environment while it almost entirely exists as the precipitate of Fe(OH)$_3$(s) at Eh 520 mV of oxidizing environment. All of cobalt and nickel are predicted to be dissolved in the liquid phase regardless of pH since the solubility limit is greater than the total concentration. In the case of cesium and strontium, all forms of both ions are present in the liquid phase because they have negligible sorption capacity on cement and large solubility under disposal atmosphere. And thus the total concentration determines the equilibrium concentration. Adsorbed amount of iodide and carbonate are dependent on adsorption capacity and adsorption equilibrium constant. Especially, the calcite turns out to be a solubility-limiting phase on the carbonate system. In order to validate the model, the equilibrium concentrations measured for a number of systems which consist of iron, cement, synthetic groundwater and radionuclides are compared with those predicted by the model. The concentrations between the model and the experiment of nonadsorptive elements cesium, strontium, cobalt nickel and iron, are well agreed. It indicates that the assumptions and the thermodynamic data in this work are valid. Using the adsorption equilibrium constant as a free parameter, the experimental data of iodide and carbonate have been fitted to the model. The model is in a good agreement with the experimental data of the iodide system.

참고문헌 (14)

  1. Diffusion and Sprption of Cs, Sr and I in Water Saturated Cement , Atkinson, A.;A.K. Nickerson , Nuclear Technology / v.8,pp.100-103, 1988
  2. Diffusion of Radionuclides in Concrete/Bentonite Systems , Albinsson, Y. (et al.) , SKB TR-93-29 / v.,pp., 1993
  3. MINEQL : A Computer Program for the Calculation of Chemical Equilibrium Composition of Aqueous System. , Westall, J. C.;J.L. Zachary;F.M.M. Morel , Technical Note 18 / v.,pp., 1976
  4. Atlas of Electrochenical Equilibria in Aqueous Solutions , Pourbaix. M. , National Association of Corrosion Engineers / v.,pp., 1974
  5. EQMOD : A Chemical Equioibrium Model of Complexation , Ydh, G.T. , Oxidation-Reduction, and Acid-Base Reactions / v.,pp., 1992
  6. A Study on the Saferty Assessment for the Radwaste Disposal : Vo 4. : A Study on the Retardation of Radionuclide Release in the Engineered Barriers , Hahn, P.S. (et al.) , KAERI-NEMAC/RR-11 9/94, Nuclear Environment Management / v.,pp., 1994
  7. Degradation of Concrete and Transport of Radionuclides fron SFR-Re-pository for Low-and Intermediate Livel Nuclear Waste , Neretnieks, I. (et al.) , SKB Progress Report SFR 87-11 / v.,pp., 1987
  8. Stumm, w.;J.J. Morgan , Aquatic Chemistry : An Introduction Emphasizing Chemical Equilibria in Natural Waters / v.,pp., 1981
  9. HARPHRQ-An Extended Version of the Geochemical Code PHREEQE , Haworth, A. , UK Nirex Ktd Roport NSS/R188 / v.,pp., 1991
  10. ASM Mwtals Reference Book , Cubbery, W.H. (et al.) , American Society for Mstals / v.,pp., 1981
  11. Radionuclide Solubilities to be Used in SKB 91 , Bruno, J.;P. Sellin , SKB Technical Report 92-13, Swedish Nuclear Fuel and Waste Management CO. / v.,pp., 1992
  12. A Study on the Safety Assessment for the Radwaste Disposal : Vol. 3 : Modeling and Validation of Radionuclide Release Source Term form Repository , Kim C.L. (et al.) , KAERI-NEMAC/RR-1 16/94 / v.,pp., 1994
  13. PHREEQE : A Computer Program for Geochemical Claculations , Pardhurst, D.L.;D.C. Thorstenson;L.N. Plummer , U.S. Geological Survey Water Resources Investigation Report / v.,pp.80-96, 1980
  14. The EQ3/6 Sortware Package of Geochemical Modelling : Current Ststus , Thomas, J. (dt al.) , UCRL-98729, / v.,pp., 1988

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