Study of Selected Off-Gases Produced during the Immobilization of Nuclear Wastes in the SYNROC Process. Final Report for the Year Ended December 31, 1982

摘要

The vaporization of cesium from the SYNROC mineral barium-cesium hollandite was studied over the temperature range 900 exp 0 C to 1150 exp 0 C using the transpiration method. With a dry argon-5% hydrogen carrier gas, the pressure of cesium over barium-cesium hollandite solid solution follows the relationship, log P/sub Cs/(atm) = 2.743 - 1.135 X 10 exp 4 /T(K). The heat of vaporization is 217 +- 15 kJ/mole. The presence of water vapor increased the volatility of cesium. (ERA citation 09:002000)