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ORNL-4832

MOLTEN-SALT REACTOR PROGRAM

SEMIANNUAL PROGRESS REPORT

For Period Ending August 31, 1972

Introductionvii

Summaryix

PART 1. MSBR DESIGN AND DEVELOPMENT

1. DESIGN2

1.1 Lead-Cooled MSBRs2

1.2 MSBR Industrial Design Study5

1.2.1 Drain Tank5

1.2.2 Physics Calculations10

1.2.3 Chemical Processing11

1.3 Xenon Behavior in the MSBR Fuel Salt System11

1.4 Hybrid Computer Simulation of the MSBR13

2. REACTOR PHYSICS14

2.1 Analysis of HTLTR-MSR Lattice Experiments14

2.2 Nuclear Performance of Lead-Cooled Molten-Salt Reactors14

2.3 Plutonium Use in Molten-Salt Reactors16

2.3.1 Fuel for Molten-Salt Converter Reactors16

2.3.2 Start-up of an MSBR on Plutonium Fuel22

2.3.3 ROD Code Modifications25

3. SYSTEMS AND COMPONENTS DEVELOPMENT26

3.1 Gaseous Fission Product Removal26

3.1.1 Bubble Separator and Bubble Generator26

3.1.2 Bubble Formation and Coalescence Test29

3.1.3 Mass Transfer to Circulating Bubbles29

3.2 Gas Systems Technology Facility30

3.3 Molten-Salt Steam Generator Industrial Program30

3.4 Coolant-Salt Technology Facility (CSTF)31

3.5 Salt Pumps32

3.5.1 Salt Pumps for MSRP Technology Facilities32

3.5.2 ALPHA Pump33

4. HEAT TRANSFER AND PHYSICAL PROPERTIES35

4.1 Heat Transfer35

4.2 Thermal Conductivity36

PART 2. CHEMISTRY

5. BEHAVIOR OF HYDROGEN AND ITS ISOTOPES38

5.1 The Solubility of Hydrogen in Molten Salt38

5.2 Hydrogen Permeation Through Metals39

5.3 The Chemisorption of Tritium on Graphite42

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