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MOLTEN-SALT REACTOR PROGRAM - page 76 / 122

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7.6.3 Corrosion Product Deposition102

7.6.4 Gas System Studies102

7.7 MSBR Pumps106

7.7.1 MSBR Primary-Salt Pump106

7.7.2 Pump Program for the Molten-Salt Breeder Experiment108

7.7.3 MSBE Salt Pump Test Stand109

7.7.4 ALPHA Pump109

7.8 Remote Welding109

8. MSBR INSTRUMENTATION AND CONTROLS113

8.1 Control System Analysis113

8.2 Calculations of Neutron Decay After Shutdown115

8.2.1 Calculation of the Effect of the Beryllium Photoneutron

Reaction on Neutron Density After Shutdown115

8.2.2 Calculation of Neutron Density Following Loss of Primary Flow115

8.3 Dynamic Analysis of MSBR Steam Generator116

8.4 High-Temperature Resistance Thermometer Evaluation116

9. HEAT TRANSFER AND THERMOPHYSICAL PROPERTIES119

9.1 Heat Transfer119

9.2 Thermophysical Properties122

9.2.1 Thermal Conductivity122

9.3 Mass Transfer to Circulating Bubbles124

PART 3. CHEMISTRY

10. CHEMISTRY OF THE MSRE129

10.1 A Material Balance for the MSRE Fuel Salt129

10.2 MSRE Fuel Circuit Corrosion Chemistry130

10.3 Adjustment of U3+/ΣU Concentration of the MSRE Fuel Salt133

10.4 Examination of Simulated MSRE Fuel Mixture for Foam-Producing Properties135

10.5 Foaming Behavior in Molten Salts137

11. FISSION PRODUCT BEHAVIOR138

11.1 Fission Product Behavior in the MSRE138

11.1.1 Examination of Graphite Surveillance Specimens138

11.1.2 Distribution of Fission Products in the MSRE138

11.1.3 Fission Product Inventory During 233U Operation138

11.1.4 Response of 95Nb Activity to Fuel Redox Chemistry139

11.1.5 MSRE Off-Gas Analyzer-Sampler140

11.1.6 Examination of Material Recovered from MSRE Off-Gas Line143

11.2 Fission Product Volatilization Tests145

11.2.1 Chemical Probe Tests145

11.2.2 Electric Charge of the Radioactive Aerosols148

11.2.3 Electron Microscope Tests148

11.2.4 Aerosol Deposition from a Helium Stream148

11.2.5 Closed Tube Diffusion Tests150

11.2.6 Volatilization of MSRE Salt in the Absence of Radioactivity150

11.2.7 Summary and Interpretation of Hot-Cell Test Results151

11.2.8 Attempt to Sample Foam in Pump Bowl151

11.3 Laboratory Tests on Aerosol Formation Over Molten Salts and Transfer of

Niobium from Salt to Bismuth153

11.4 The Chemistry of the Noble Fission Product Fluorides157

11.4.1 Molybdenum Fluoride Synthesis, Characterization, and Stability157

11.4.2 Mass Spectrometric Studies of Fluorides159

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