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MOLTEN-SALT REACTOR PROGRAM - page 46 / 122

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Manipulator56

Access Port57

Operational Valve57

Sampling Capsule58

Fuel-Processing Sampler58

Off-Gas System58

Remote Maintenance60

Pump Development61

MSRE Pumps61

Measurement of the Concentration of Undissolved Helium in Circulating Molten Salt62

Other Molten-Salt Pumps65

Instrument Development66

Ultrasonic, Single-Point Molten-Salt Level Probe66

High-Temperature NaK-Filled Differential-Pressure Transmitter70

Float-Type Molten-Salt Level Transmitter71

Conductivity-Type, Single-Point Molten-Salt Level Probe71

Single-Point Temperature Alarm Switches72

Helium Control Valve Trim Replacement72

Thermocouple Development and Testing73

3. MSRE REACTOR ANALYSIS75

Theory of Period Measurements Made with the MSRE During Fuel Circulation75

Part 2. MATERIALS STUDIES

4. METALLURGY81

Dynamic Corrosion Studies81

Corrosion Studies Using Lead as a Coolant82

Revised Thermal Convection Loop Design85

MSRE Materials Surveillance Testing87

INOR-8 Surveillance Specimens88

Graphite Surveillance Specimens88

Assembly of Surveillance Specimens90

Evaluation of Radiation-Damage Problems of Graphite for Advanced Molten-Salt Reactors93

Mechanical Properties of Irradiated INOR-894

Mechanical Properties of Unirradiated INOR-8 Used in the Reactor Vessel94

Postirradiation Stress-Rupture Properties of INOR-8102

In-Reactor Creep Tests104

5. RADIATION CHEMISTRY106

Introduction106

Experimental Objectives and Design Considerations106

Experiment Design and Mockup Test Operation107

6. CHEMISTRY111

Chemistry of the MSRE111

MSRE Fuel Loading111

MSRE Salt Chemistry During Pre-critical and Zero-Power Experiments112

Examination of Salts After the Zero-Power Experiment117

Density of MSRE Fuel and Coolant Salts119

Chemistry of LiF-BeF2 Systems123

Solubility of HF and DF in Molten LiF-BeF2 (66-34 Mole%)123

Vapor Pressure123

The Quest for Liquid-Liquid Immiscibility in LiF-BeF2 Melts126

Removal of Iodide from LiF-BeF2 Melts by HF-H2 Sparging127

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