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Abstract: The purpose of this study was to measure the thermal conductivity of cementitious Kaolite 1600 for its potential to replace the radioactive materials in ES-2 containers. A Hot Disk Thermal Constants Analyzer measured the thermal conductivity of the Kaolite samples using the transient plane source (TPS) method. Results showed that despite different densities, the thermal conductivities of the samples were similar up to 100 °C.  Similar to ceramics and other insulating materials, the thermal conductivity decreased as temperatures approached 300 °C, then finally increased at approximately 600 °C. These are the first reported literature values for Kaolite 1600 samples that were tested up to 600 °C.  

Reference: U.S. Department of Energy (2003) 1-6