Long-term field and laboratory leaching tests of cemented radioactive wastes

JOURNAL OF HAZARDOUS MATERIALS

卷:187

Article

Ojovan, Michael I.¹  Varlackova, Galina A.²  Golubeva, Zoya I.²  Burlaka, Olga N.² 

[1] Univ Sheffield, Dept Mat Sci & Engn, Immobilisat Sci Lab, Sheffield S1 3JD, S Yorkshire, England

[2] Sci & Ind Assoc Radon, Moscow, Russia

关键词: Waste immobilisation;    Cement;    Leaching;    Field tests;    Laboratory tests;    Long-term performance;   

DOI  :  10.1016/j.jhazmat.2011.01.004

来源: Elsevier

【 摘 要 】

Experiments with real and simulated radioactive cementitious wasteforms were set up to compare the leaching behaviour of cementitious wasteforms containing nuclear power plant operational waste in field and laboratory test conditions. Experiments revealed that the average annual Cs-137 leach rate in deionised water was about thirty-five times greater compared with the measured average value for the 1st year of the field test. Cumulative leached fraction of Cs-137 for 1st year (3.74%) was close to values reported in literature for similar laboratory experiments in deionised water, however more than two orders of magnitude higher than the 1st year leached fraction of Cs-137 in the repository test (0.01%). Therefore, to compare field and laboratory test results, a scaling factor is required in order to account for surface to volume factor difference, multiplied by a temperature factor and a leach rate decrease coefficient related to the ground water composition. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

Free