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首页> 美国政府科技报告 >Material Studies on Solidification of Medium-Level Waste Solutions with Cement: Leachability of Cesium and Strontium
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Material Studies on Solidification of Medium-Level Waste Solutions with Cement: Leachability of Cesium and Strontium

机译：中等水泥废液固化的材料研究：铯和锶的可浸出性

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Two leaching techniques, i.e., the IAEA method and an accelerated test, were used to search for methods of reducing the leachability of cesium and strontium from products formed during cementation of medium-level waste solutions from reprocessing plants. A certain natural calcium bentonite lowers the leachability of cesium by a factor of up to 100. This effect increases with the quantity added. Strontium leachability can be reduced to a smaller extent by addition of a barium silicate hydrate. This effect is found particularly at high temperature. Leaching into a salt brine which is in equilibrium with carnallite and other salts is significantly lower than into distilled water. Excess cesium increases the leachability of cesium. Other parameters such as cement type, curing time, fluidizers and salt content have little or even no influence. Tests on the settlement behavior of cement mortars containing simulated waste solution revealed very unfavorable behavior of blast-furnace slag cement. (ERA citation 05:021893)

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