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MOLTEN-SALT REACTOR PROGRAM - page 42 / 122

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Drain Tank System26

Charcoal Beds26

Control Rod Drives26

Sampling and Enriching Systems26

Vapor-Condensing System26

2. COMPONENT DEVELOPMENT27

Life Tests27

Pipe Heaters27

Drain Tank Heater27

Drain Tank Cooler27

Freeze Valve28

Check-Out and Startup of Components28

Freeze Flanges28

Freeze Valves28

Control Rods29

Prototype Control Rod Drive Test29

Control Rod Drive Units30

Diaphragm Leakage31

Samplers32

Temporary Drain Tank Sampler32

Temporary Fuel System Sampler32

Coolant Salt System Sampler32

Engineering Test Loop35

Zirconium Oxide Cold Trap35

Maintenance36

Instrument Development38

Ultrasonic Single-Point Molten-Salt Level Probe38

Float-Type Molten-Salt Level Transmitters41

Conductivity-Type Single-Point Molten-Salt Level Probe41

MSRE Bubbler-Type Molten-Salt Level Indicator42

Thermocouple Development and Testing43

Temperature Scanner44

Single-Point Temperature Alarm Switches46

High-Temperature Resistance Thermometers47

High-Temperature NaK-Filled Differential Pressure Transmitter48

Helium Control Valve Trim Replacement48

Control Valve Actuator Motion Multiplier49

Pump Development50

MSRE Pumps50

Other Molten-Salt Pumps52

3. MSRE REACTOR ANALYSIS54

MSRE Stability Analysis54

Methods Used54

Results54

Suppression of Criticality in MSRE Cell in Event of the Maximum Credible Accident56

Effectiveness of a Radial Molten-Salt Blanket on the Breeding Potential

of a One-Fluid Graphite-Moderated Reactor57

Results57

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