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

Michael I. Ojovan, Galina A. Varlackova

2011enwaste immobilisationcementleachingfield testslaboratory testslong-term performance

Abstract

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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 137 Cs 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 137 Cs 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 137 Cs 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.

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Cite This Work

@article{ed0c9b24-76ea-411e-9160-e2dd8307e35f,
  title={Long-term field and laboratory leaching tests of cemented radioactive wastes},
  author={Michael I. Ojovan and Galina A. Varlackova},
  year={2011},
  language={en}
}
TY  - JOUR
TI  - Long-term field and laboratory leaching tests of cemented radioactive wastes
AU  - Michael I. Ojovan
AU  - Galina A. Varlackova
PY  - 2011
LA  - en
ER  -

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