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3.4 Test of MSRE Rod Control System Under Simulated 233U Loading Conditions32

3.5 Analog Computer Studies of the MSRE System with 233U Fuel Loading35

4. MSRE REACTOR ANALYSIS36

4.1 Introduction36

4.2 Simulation of Nuclear Excursion Incidents37

4.2.1 Uncontrolled Rod Withdrawal37

4.2.2 Return of Separated Uranium to the Core40

4.3 Detection of Anomalous Reactivity Effects47

PART 2. MSBR DESIGN AND DEVELOPMENT

5. DESIGN51

5.1 General51

5.2 Flow Diagram51

5.3 Plant Layout53

5.4 Reactor Vessel and Core55

5.5 Primary Heat Exchanger61

5.6 Fuel Drain Tank61

6. REACTOR PHYSICS66

6.1 MSBR Physics Analysis66

6.1.1 Reference Reactor66

6.1.2 Fuel-Cycle Costs70

6.1.3 Cell Calculations70

6.1.4 Reactivity Coefficients71

6.1.5 Measurements of Eta for 233U and 235U in the MSRE72

7. SYSTEMS AND COMPONENTS DEVELOPMENT74

7.1 Noble Gas Behavior in an MSBR74

7.2 Sodium Fluoroborate Circulating Loop Test75

7.3 MSBR Pumps75

7.3.1 Pump Program75

7.3.2 Fuel Salt Pump76

7.3.3 Coolant Salt Pump78

7.3.4 Molten-Salt Pump Test Facility78

7.3.5 Molten-Salt Bearing Program79

7.3.6 Rotor-Dynamics Feasibility Investigation82

7.4 Remote Maintenance82

8. MSBR INSTRUMENTATION AND CONTROLS85

8.1 Analog Computer Studies85

PART 3. CHEMISTRY

9. CHEMISTRY OF THE MSRE88

9.1 Fuel Salt Composition and Purity89

9.2 MSRE Fuel Circuit Corrosion Chemistry90

9.3 Isotopic Composition of Uranium in MSRE Fuel Salt93

10. FISSION PRODUCT BEHAVIOR94

10.1 Fission Product Behavior in the MSRE94

10.1.1 Fission Products in the MSRE Fuel94

10.1.2 Fission Products in the MSRE Cover Gas96

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