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MOLTEN-SALT REACTOR PROGRAM - page 59 / 122

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3. INSTRUMENTS AND CONTROLS47

3.1 MSRE Operating Experience47

Control System Components47

Nuclear Instruments47

Safety System48

3.2 Control System Design48

4. MSRE REACTOR ANALYSIS50

4.1 Introduction50

4.2 Neutron Energy Spectra in MSRE and MSBR50

4.3 Other Neutronic Characteristics of MSRE with 233U Fuel54

Critical Loading, Rod Worth, and Reactivity Coefficients54

Fission Rate and Thermal Flux Spatial Distributions55

Reactor-Average Fluxes and Reaction Cross Sections55

Effect of Circulation on Delayed-Neutron Precursors58

Samarium Poisoning Effects60

4.4 MSRE Dynamics with 233U Fuel61

PART 2. MSBR DESIGN AND DEVELOPMENT

5. DESIGN63

5.1 General63

5.2 Cell Arrangement65

5.3 Reactor71

5.4 Fuel Heat Exchanger76

5.5 Blanket Heat Exchanger76

5.6 Fuel Drain Tanks79

5.7 Blanket and Coolant Salt Drain Tanks79

5.8 Steam Generator-Superheater and Reheater81

6. REACTOR PHYSICS82

6.1 MSBR Physics Analysis82

Optimization of Reactor Parameters82

Useful Life of Moderator Graphite84

Flux Flattening87

Temperature Coefficients of Reactivity88

7. SYSTEMS AND COMPONENTS DEVELOPMENT90

7.1 Noble-Gas Behavior in the MSBR90

7.2 MSBR Fuel Cell Operation with Molten Salt95

7.3 Sodium Fluoroborate Circulating Loop Test95

7.4 MSBR Pumps96

Survey of Pump Experience Circulating Liquid Metals and Molten Salts96

Introduction of MSBR Pump Program96

Fuel and Blanket Salt Pumps97

Coolant Salt Pumps99

Water Pump Test Facility99

Molten-Salt Bearing Tests100

Rotor-Dynamics Feasibility Investigation100

Other Molten-Salt Pumps101

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