BENTONITE-QUARTZ SAND AS THE BACKFILL MATERIALS ON THE RADIOACTIVE WASTE REPOSITORY

https://doi.org/10.22146/ijc.21816

Raharjo Raharjo(1*)

(1) Research and Development Center for Advanced Technology, National Nuclear Energy Agency
(*) Corresponding Author

Abstract


An investigation of the contribution of quartz sand in the bentonite mixture as the backfill materials on the shallow land burial of radioactive waste has been done. The experiment objective is to determine the effect of quartz sand in a bentonite mixture with bentonite particle sizes of -20+40, -40+60, and -60+80 mesh on the retardation factor and the uranium dispersion in the simulation of uranium migration in the backfill materials. The experiment was carried out by the fixed bed method in the column filled by the bentonite mixture with a bentonite-to-quartz sand weight percent ratio of 0/100, 25/75, 50/50, 75/25, and 100/0 on the water saturated condition flown by uranyl nitrate solution at concentration (Co) of 500 ppm. The concentration of uranium in the effluents in interval 15 minutes represented as Ct was analyzed by spectrophotometer, then using Co and Ct, retardation factor (R) and dispersivity () were determined. The experiment data showed that the bentonite of -60+80 mesh and the quartz sand of -20+40 mesh on bentonite-to-quartz sand with weight percent ratio of 50/50 gave the highest retardation factor and dispersivity of 18.37 and 0.0363 cm, respectively.


Keywords


bentonite; quartz sand; backfill materials; radioactive waste

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References

[1]   Lopez, R.S. and Johnson, L.H., 1986, Vault Sealing Research and Development for the Canadian Nuclear Fuel Waste Management, Atomic Energy of Canada Limited - 9053

[2]   LeNeveu, D.M., 1986, Vault Submodel for the Second Interim Assesment of the Canadian Concept for Nuclear Fuel Waste Disposal : Post-Closure Phase, Atomic Energy of Canada Limited - 8383

[3]   Aoki, M.M.M, Takizawa, M. and Takahashi, M., 1984, Waste Management, 2, 495-501

[4]   Miyahara, K. Sasaki, N., 1991, Radiochemica Acta, 52/53, 293-297

[5]   Conca, J.L., Ashida, T., and Sato, H., 1991, Waste Management, 2, 1382-1389

[6]   Kanwar, R., and Wattal, P.R., 1983, Conditioning of Law Heat Generating Waste by Incorporation in Barrier Impregnated Composite Matrice, A Review of Experience in Industrial Scale Operation, Proceeding of Symposium Utrecht, IAEA, Vienna

[7]   Verstricht, J., Demarche, M., and Gatabin, C., 2001, Development of Backfill Material within the Belgium Concept for Geological Disposal of High-Level Radioactive Waste : An Example of Successful International Co-operation, Waste Management Conceference, Tucson Arizona

[8]   Champ, D.R., Moltyaner, G.L., Young, J.L. and Lapcevic, P., 1985, A Downhole Column Technique for Filed Measurement of Transport Parameter, AECL-8905

[9]   Schneider, K., 1982, Site Investigation for Repositories for Solid Radioactive Wastes in Shallow Ground, Technical Report Series No. 216, Vienna

[10] Simoen, S. dan Purnama, Ig.S., 1992, Petunjuk Praktikum Geohidrologi, Fakultas Geografi UGM, Yogyakarta

[11] Guven, R.W., 1985, Analysis and Interpretation of Single-Well Tracer Test in Stratified Aquifer, Water Resource Research 21, 5



DOI: https://doi.org/10.22146/ijc.21816

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Indonesian Journal of Chemistry (ISSN 1411-9420 / 2460-1578) - Chemistry Department, Universitas Gadjah Mada, Indonesia.

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