N. V. Ojovan, I. V. Startceva
Control leaching experiments with laboratory cement samples containing simulated radioactive RBMK operational waste were set up to compare the leaching parameters with the field test leach data of pilot-scale cemented waste forms containing real RBMK operational waste. The aim was to gain information on the reliability of field test data and to validate the leach test methods. The average annual 137Cs leach rate in deionized water was about thirty times greater than the measured value for the first year of the repository test, which may be attributed to the lower average annual temperature in the repository, the influence of the leachant medium, and other factors. The 137Cs cumulative leached fraction (3.7% for 1 year) was close to the value reported in literature for a similar experiment in deionized water, yet it was more than two orders of magnitude higher than the first-year leached fraction in the repository test (0.01%). In the latter case, the sample volume was 630 times greater, and the sample surface to volume ratio, S/V, was 8.6 times less. To compare the field test results with the laboratory leach test, a scaling factor S/V multiplied by a temperature factor and a leach rate decrease coefficient related to the leachant media should be taken into consideration.
@article{d9e31ba3-15e0-4d2d-951b-437b97679b4d,
title={RADIOACTIVE CEMENTITIOUS WASTE FORM BEHAVIOR UNDER LONG-TERM FIELD AND LABORATORY TEST CONDITIONS},
author={N. V. Ojovan and I. V. Startceva},
year={2004},
language={en}
}TY - JOUR TI - RADIOACTIVE CEMENTITIOUS WASTE FORM BEHAVIOR UNDER LONG-TERM FIELD AND LABORATORY TEST CONDITIONS AU - N. V. Ojovan AU - I. V. Startceva PY - 2004 LA - en ER -
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