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10.1.3 Deposition of Fission Products from MSRE Cover Gas on Metal Specimens96

10.1.4 Examination of MSRE Surveillance Specimens After 24,000 MW*hr99

10.1.5 Hot-Cell Tests on Fission Product Volatilization from Molten MSRE Fuel100

10.1.6 Miscellaneous Tests108

10.2 Fission Product Distribution in an MSRE Graphite Surveillance Specimen115

10.3 Proton Reaction Analysis for Lithium and Fluorine in MSR Graphite119

10.4 Surface Phenomena in Molten Salts125

11. CHEMISTRY OF FISSION PRODUCT FLUORIDES129

11.1 Properties of Molybdenum Fluorides129

11.1.1 Synthesis of MoF3 and MoF5129

11.1.2 Lithium Fluoromolybdates(III)130

11.1.3 Kinetics of MoF3 Behavior in 2LiF-BeF2131

11.2 Mass Spectrometry of the Molybdenum Fluorides134

11.3 Spectroscopic Studies of Fission Product Fluorides136

11.4 Preparation of Niobium Pentafluoride137

12. PHYSICAL CHEMISTRY OF MOLTEN SALTS138

12.1 Thermodynamics of LiF-BeF2 Melts by EMF Measurements138

12.2 Electrolysis of LiF-BeF2 Mixtures with a Bismuth Cathode140

12.3 A Review of Electrical Conductivities in Molten Fluoride Systems141

12.4 Measurement of Specific Conductance in LiF-BeF2 (66-34 mole %)144

12.5 A Stirred Reaction Vessel for Molten Fluorides146

12.6 The Chemistry of Silica in Molten LiF-BeF2146

12.7 A Silica Cell and Furnace for Electrochemical Measurements with Fused Fluorides149

12.8 Status of the Molten-Salt Chemistry Information Center149

13. CHEMISTRY OF MOLTEN-SALT REACTOR FUEL REPROCESSING TECHNOLOGY152

13.1 MSBR Fuel Reprocessing by Reductive Extraction into Molten Bismuth152

13.2 Removal of Structural Metal Fluorides from a Simulated MSRE Fuel Solvent155

13.2.1 Reduction of Structural Metal Fluorides155

13.2.2 Salt Filtration Studies157

13.3 Protactinium Studies in the High-Alpha Molten-Salt Laboratory159

13.3.1 Protactinium Reduction by Solid Thorium in the Near Absence of Iron159

13.3.2 Reduction of Protactinium by Bismuth-Uranium Alloy159

13.3.3 Reduction of Protactinium by Bismuth-Thorium Alloys160

13.3.4 Two-Region Breeder Blanket Composition160

13.3.5 Single-Region Fuel Composition161

14. BEHAVIOR OF BF3 AND FLUOROBORATE MIXTURES166

14.1 Phase Relations in Fluoroborate Systems166

14.1.1 The System NaF-NaBF4-KBF4-KF166

14.2 Nonideality of Mixing in Potassium Fluoroborate-Sodium (or Potassium) Fluoride Systems167

14.3 Heat Content of NaBF4-NaF (92.5-7.5 mole %)168

14.4 The Solubility of Thorium Metal in Lithium Fluoride-Thorium Tetrafluoride Mixtures168

14.5 Dissociation Pressure of BF3 for the MSRE Substitute Coolant169

14.6 Chemical Thermodynamics of the System NaBF4NaF170

14.7 Corrosion of Hastelloy N and Its Constituents in Fluoroborate Melts171

14.8 Compatibility and Immiscibility of Molten Fluorides171

PART 4. MOLTEN-SALT IRRADIATION EXPERIMENTS

15. MOLTEN-SALT CONVECTION LOOP IN THE ORR174

15.1 Isotope Activity Balance (Loop 2)175

15.2 Penetration of Fission Products into Graphite and Deposition onto Surfaces175

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