Skip to main content Accessibility help
×
Home

Characterization of Solidified Radioactive Waste and Container due to the Incorporation of High Density Polyethylene Granules and Powder in Mmortar Matrices

  • Aleksandar D. Perić (a1)

Abstract

Powder and granules of the high density polyethylene (PEHD) were used to prepare mortar based matrices for immobilization of radioactive waste materials containing 137Cs, as well as containers for solidified radioactive waste form. Seven types of matrices, differ due to the percentage of granules and filler material added, were investigated. PEHD powder and granules were added to mortar matrix preparations with the objective of improving physico-chemical characteristics of the radwaste-mortar matrix mixtures, in particular the leach-rate of the immobilized radionuclide, as well as mechanical characteristics either of mortar matrix and container. In this paper, only mechanical strength aspect of the investigated mortar and concrete container formulations, is presented. The equivalent diameter of the PEHD granules used was 2.0 mm. PEHD granules were used to replace 100 volume percent of stone granules, sifted size of 2.0 mm, normally used in the matrix preparation, in order to decrease the porosity and density of the mortar matrix and to avoid segregation of the stone particles at the bottom of the immobilized radioactive waste cylindrical form. PEHD powder, particle size of 250 micrometre, was added as filler to the mortar formulation, replacing 5, 8 and 10 weight percent of the total cement weight in matrix formulation and 15 and 18 weight percent of the total cement weight in container formulation. Cured samples were investigated on mechanical strength, using 150 MPa hydraulic press, in order to determine influence of added polyethylene granules and powder on samples resistance to mechanical forces that solidified waste materials and concrete containers may experience at the disposal site. Results of performed investigations have shown that samples prepared with polyethylene granules, replacing 100 weight percents of the stone granules, have almost twice as much mechanical strength than samples prepared with stone aggregate. Samples prepared with PEHD granules and powder have mechanical strength resistance up to 13.5 percent higher than ones prepared with PEHD granules, solely. Improved Mechanical strength resistance of tested samples accommodates trend that functionally depends on the percentage of PEHD powder added in formulation.

Copyright

References

Hide All
1. Mawson, C.A., Management of Radioactive Wastes (D.van Nostrand Company Inc., London, 1965).
2. Tallberg, K., Aitola, P., IAEA SM-207/78, 1978.
3. IAEA, Technical Reports Series No.222, 1981.
4. Hespe, E., Atomic Energy Rev. 9(1), 195 (1971).
5. EC, Second Annual Progress Report of the European Community Programme: 1980–1984. Research and Development on Radioactive Waste Management and Storage, Radioactive Waste Management, 8 (1981).
6. Bernard, A., Nomine, J.C., Cornec, G., Bonnett, A., Farges, A., Nuclear and Chemical Waste Management 3, 161 (1982).
7. Amarantos, S.G., Papadokostaki, K.G., Petropoulos, J.H., CEC Report WAS-305-83-15-GR(B), 1984.
8. Hung, C.Y., Nucl.Chem.Waste Management, 3, 235 (1982).
9. Perić, A.D., Report on IAEA fellowship, Proposal for the Project “Lyssia”,(1991).
10. Perić, A.D., Plećaš, I.B., Pavlović, R.S., Pavlović, S.D. in Scientific Basis for Nuclear Waste Management XVI, edited by Aaron, Barkatt and Richard A.Van, Konynenburg (Material Research Society Proc. 333, Pittsburg, PA, 1993) pp. 377382.
11. IAEA, Safety Series No.63, 1984.
12. IAEA, “Waste Disposal in Shallow Land Burial”, Interregional training course, KfK, Karlsruhe, 1989.
13. Perić, A. et al., in Radioactive waste management practices and issues in developing countries, edited by Vladimir, Tsyplenkov, (IAEA Proc. 851, Vienna, Austria 1995) pp.223227.
14. Perić, Aleksandar D., in Scientific Basis for Nuclear Waste Management XIX, edited by Murphy, William M. and Knecht, Dieter A. (Mat Res.Soc.Proc. 412, Pittsburg, PA 1995) pp. 429433.
15. Perić, Aleksandar D., Plećaš, Ilija B., Pavlović, Radojko S., Environmental International, 22, 6, (1996).
16. Perić, A.D., Plećaš, I.B. and Pavlović, R.S., in International Symposium on The Scientific Basis for Nuclear Waste Management, edited by Tokashi, Murakami and Ewing, Rodney C., (Mat.Res.Soc.Proc. 353, Pittsburgh, PA, 1994) pp. 907911.
17. Perić, A., Plećaš, I., in Resumenes de las ponencias presentadas en la XX Reunion Anual de la Sociedad Nuclear Espanola, (Spanish Nuclear Soc. Proc. 20, Madrid, Spain, 1994) pp. 223224.
18. Perić, Aleksandar, in IRPA'9 International Congress on Radiation Protection, (Inter. Rad.Prot.Ass. Proc. Vol.II, Vienna, Austria, 1996) pp. 768770.

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed