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MOLTEN-SALT REACTOR PROGRAM - page 24 / 122

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4.2.2 Temperature Range of Melting for INOR-8102

4.2.3 Specific Heat of INOR-8103

4.3 Total Hemispherical Emittance of INOR-8103

4.4 Welding and Brazing Studies106

4.4.1 Welding of INOR-8106

4.4.2 Metallographic Examination and Bend Tests on Welds106

4.4.3 Transverse Tensile and Creep Tests106

4.4.4 Welding of INOR-8 to Stainless Steel and Inconel108

4.4.5 Remote Brazing109

4.5 Mechanical Properties of INOR-8112

4.6 Impregnation of Graphite by Molten Salts113

4.7 Ammonium Bifluoride as an Oxygen-Purging Agent for Graphite114

4.7.1 Removal of Oxygen from Graphite114

4.7.2 Effects of the Thermal-Decomposition Products

of Ammonium Bifluoride on INOR-8115

5. IN-PILE TESTS117

5.1 Graphite-Fuel Capsule Experiments117

6. CHEMISTRY119

6.1 Phase-Equilibrium Studies119

6.1.1 Systems Involving NaF with ZrF4, ThF4, and UF4 and Other Constituents119

6.1.2 The System NaF-ThF4-UF4119

6.1.3 Stannous Fluoride as a Component of Reactor Fuels122

6.2 Oxide Behavior in Fuels124

6.2.1 Behavior of MSRE Fuel on Freezing and Effect

of Segregation on Oxide Precipitation124

6.2.2 Oxide Content of Fluoride Melts125

6.3 Physical and Chemical Properties126

6.3.1 Surface Tension Apparatus for Molten Fluorides126

6.3.2 Volatilization of Iodine from the MSRE Fuel126

6.4 Graphite Compatibility127

6.4.1 Effect of Cesium Vapor on Graphite127

6.5 Fuel Production128

6.5.1 Purification Treatments128

6.6 Analytical Chemistry128

6.6.1 Analyses of MSRE Fuel Mixture128

6.6.2 Analyses of MSRE Cover Gas129

7. ENGINEERING RESEARCH131

7.1 Physical-Property Measurements131

7.2 Heat-Transfer Studies133

8. FUEL PROCESSING135

8.1 Preparation and Analysis of Complex Fluorides of SbF5 with KF, AgF, and SrF2135

8.2 Preparation and Analysis of the NaF-MoF6 Complex135

8.3 Preparation and Analysis of Complexes of UF6 with LiF, NaF, and KF136

8.4 Attempt to Separate Rare Earth Fluorides from MSBR Blanket Salt by SbF5 in HF136

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