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9.3.2 Heat Capacity103

9.3.3 Property Prediction104

9.4 Mass Transfer to Circulating Bubbles106

PART 3. CHEMISTRY

10. CHEMISTRY OF THE MSRE109

10.1 Chemical Feasibility of Fueling Molten-Salt Reactors with Plutonium Trifluoride110

10.2 Chemical Determination of Burnup in 235U Operations110

10.3 High-Temperature Fuel Salt-Graphite Compatibility Experiment112

10.4 Examination of a Corroded Cap from a Sample Capsule113

11. FISSION PRODUCT BEHAVIOR115

11.1 Fission Product Behavior in the MSRE115

11.1.1 Examination of MSRE Surveillance Specimens After 64,000 MW*hr115

11.2 Fission Product Profiles in Three MSRE Graphite Surveillance Specimens141

11.2.1 Pyrolytic Graphite141

11.2.2 Unimpregnated CGB (Specimen P-55)142

11.2.3 Impregnated CGB (Specimen V-28)142

11.2.4 Overall Results146

11.3 Analysis of MSRE Graphite Sample X-13 for Fluorine and Lithium146

11.4 Surface Phenomena in Molten Salts150

12. PHYSICAL CHEMISTRY OF MOLTEN SALTS153

12.1 Molybdenum Fluoride Chemistry153

12.1.1 Synthesis of MoF3, MoF4, MoF5, and RuF3153

12.1.2 Kinetic Behavior of MoF3 in Molten 2LiF-BeF2154

12.2 Properties of the Alkali Fluoroborates155

12.2.1 Phase Relations in Fluoroborate Systems155

12.2.2 Crystal Structure of Sodium Tetrafluoroborate156

12.2.3 Heat Content of NaBF4 and KBF4157

12.2.4 Dissociation Pressure and Chemical Thermodynamics of the System KBF4-KF158

12.2.5 Density and Viscosity of Sodium Fluoroborate Melts159

12.2.6 Corrosion of Chromium by Molten Fluoroborates160

12.3 Physical Properties of LiF-ThF4 and LiF-BeF2-ThF4 Mixtures161

12.3.1 CeF3 Solubility in Molten Mixtures of LiF, BeF2, and ThF4161

12.3.2 Solubility of Thorium Metal in Molten

Lithium Fluoride-Thorium Fluoride Mixtures162

12.3.3 Heat Content of LiF-BeF2-ThF4 (72-16-12 mole %)163

12.3.4 Technical Memorandum on Physical Properties of Molten Salts163

12.4 Electrochemical Studies163

12.4.1 Electrical Conductivity of Molten LiF-BeF2 Mixtures163

12.4.2 Estimated Electrical Conductivities of MSBR-Related Salts166

12.4.3 Reference Electrodes for Molten Fluorides167

12.5 Spectroscopy of Fluoride Media168

12.5.1 The Diamond-Windowed Cell168

12.5.2 Molybdenum(III) Fluoride Solution Spectra170

12.5.3 K3MoF6 Synthesis and Spectrum170

12.5.4 Studies of the Vapor Phase over MoF3 Solutions170

12.6 Oxide Chemistry of Fluoride Melts Containing ThF4 and UF4171

12.7 Chemistry of Silica in Molten LiF-BeF2172

13. CHEMISTRY OF MOLTEN-SALT REACTOR FUEL REPROCESSING TECHNOLOGY174

13.1 Reductive Extraction of 233Pa and Uranium from

Molten LiF-BeF2-ThF4 Mixtures into Bismuth174

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