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MOLTEN-SALT REACTOR PROGRAM - page 109 / 122

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11.4 Graphite Fabrication103

11.5 Thermal Property Testing106

11.6 Reduction of Helium Permeability of Graphite by Pyrolytic Carbon Sealing107

11.7 Irradiation of Pyrocarbons111

11.8 Examination of Unirradiated and Irradiated Pyrocarbon Strips with

the Scanning Electron Microscope (SEM)111

11.9 Texture Determinations113

12. HASTELLOY N117

12.1 Mechanical Properties of Several Commercial Heats of Modified Hastelloy N117

12.2 Irradiation of Hastelloy N in the HFIR120

12.3 Salt Corrosion Studies124

12.3.1 Fuel Salt126

12.3.2 Fertile-Fissile Salt126

12.3.3 Blanket Salt127

12.3.4 Coolant Salt127

12.3.5 Corrosion of Type 304L Stainless Steel and Hastelloy N

by Mixtures of Boron Trifluoride, Air, and Argon132

12.3.6 Oxide Additions to Sodium Fluoroborate134

12.4 Forced-Convection Loop Corrosion Studies135

12.4.1 Operation of Forced-Convection Loop MSR-FCL-1A135

12.4.2 Corrosion Results from Forced-Convection Loop MSR-FCL-1A135

12.4.3 Operation of Forced-Convection Loop MSR-FCL-2136

12.4.4 Corrosion Results from Forced-Convection Loop MSR-FCL-2137

12.5 Corrosion of Hastelloy N in Steam137

13. SUPPORT FOR CHEMICAL PROCESSING147

13.1 Construction of a Molybdenum Reductive-Extraction Test Stand147

13.2 Welding of Molybdenum147

13.3 Development of Brazing Techniques for Fabricating the Molybdenum Test Loop149

13.4 Compatibility of Materials with Bismuth and Bismuth-Lithium Solutions151

13.4.1 Tantalum Alloys152

13.4.2 Molybdenum Alloys152

13.4.3 Graphite152

PART 4. FUEL PROCESSING FOR MOLTEN-SALT REACTORS

14. FLOWSHEET ANALYSIS159

14.1 Multiregion Code for MSBR Processing Plant Calculations159

15. PROCESSING CHEMISTRY160

15.1 Equilibria in Fused Salt-Liquid Alloy Systems160

15.2 Solubility of Thorium in Liquid Li-Pb Alloys162

15.3 Reductive Extraction of Titanium and Cesium163

15.4 Chemistry of Fuel Reconstitution164

15.5 Protactinium Oxide Precipitation Studies165

16. ENGINEERING DEVELOPMENT OF PROCESSING OPERATIONS168

16.1 Operation of Metal Transfer Experiment MTE-3168

16.2 Design of the Metal Transfer Process Facility171

16.3 Development of Mechanically Agitated Salt-Metal Contactors171

16.4 Reductive-Extraction Engineering Studies173

16.5 Reductive-Extraction Processing Facility Development175

16.6 Design of a Processing Materials Test Stand and the Molybdenum

Reductive-Extraction Equipment177

16.7 Removal of Bismuth from MSBR Fuel Salt178

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