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ORNL-4782

MOLTEN-SALT REACTOR PROGRAM

SEMIANNUAL PROGRESS REPORT

For Period Ending February 29, 1972

PART 1. MSBR DESIGN AND DEVELOPMENT

1. DESIGN2

1.1 Molten-Salt Demonstration Reactor Design Study2

1.1.1 General2

1.1.2 Reactor Core2

1.1.3 Graphite Temperatures6

1.1.4 Cell Cooling8

1.2 Side-Stream Processing of MSBR Primary Flow for Iodine Removal8

1.3 MSBR Industrial Design Study9

1.4 MSBE Design12

1.5 Bubble Behavior in the MSBR Primary Salt System13

2. REACTOR PHYSICS18

2.1 Experimental Physics18

2.1.1 HTLTR Lattice Experiments18

2.2 Physics Analysis of MSBR21

2.2.1 Radiation Heating in MSR Pumps21

2.2.2 MSBE Control-Rod Worths22

2.2.3 Molten-Salt Converter Reactors Using Plutonium23

3. SYSTEMS AND COMPONENTS DEVELOPMENT28

3.1 Gaseous Fission Product Removal28

3.1.1 Bubble Separator and Bubble Generator28

3.1.2 Bubble Formation and Coalescence Test29

3.1.3 Bubble Separator Analyses29

3.2 Gas System Technology Facility32

3.3 Molten-Salt Steam Generator Industrial Program33

3.4 Coolant-Salt Technology Facility33

3.5 Salt Pumps34

3.5.1 Salt Pumps for MSRP Technology Facilities34

3.5.2 ALPHA Pump35

3.5.3 Molten-Salt Mixer, Laboratory Scale37

4. INSTRUMENTATION AND CONTROLS38

4.1 Transient and Control Studies of the MSBR System Using a Hybrid Computer38

5. HEAT AND MASS TRANSFER AND PHYSICAL PROPERTIES39

5.1 Heat Transfer39

5.2 Wetting Studies40

5.3 Mass Transfer to Circulating Bubbles41

PART 2. CHEMISTRY

6. FISSION PRODUCT BEHAVIOR45

6.1 Some Factors Affecting the Deposition Intensity of Noble-Metal Fission Products45

6.2 Effects of Selected Fission Products on Hastelloy N, Nickel,

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