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ORNL-2973

MOLTEN-SALT REACTOR PROGRAM

QUARTERLY PROGRESS REPORT

For Periods Ending January 31 and April 30, 1960

SUMMARYiii

PART 1. ENGINEERING AND COMPONENT DEVELOPMENT

1.1 COMPONENT DEVELOPMENT AND TESTING3

Molten-Salt-Lubricated Bearings for Fuel Pumps3

Hydrodynamic Journal Bearings3

Test of Pump Equipped with One Molten-Salt-Lubricated Journal Bearing3

Self-Welding of INOR-85

Mechanical Seals for Pumps7

Loop for Study of MF-Pump Performance7

Frozen-Lead Pump Seal8

Remote-Maintenance Development Facility8

Design, Construction, and Operation of Materials Testing Loops12

Forced-Circulation Corrosion Loops12

Mechanical Joints19

Design and Testing of a Frozen-Salt Metal-to-Graphite Joint19

In-Pile Loops21

1.2 ENGINEERING RESEARCH23

Physical-Property Measurements23

Enthalpy and Heat Capacity23

Thermal Conductivity23

Surface Tension26

Heat-Transfer Studies27

PART 2. MATERIALS STUDIES

2.1 METALLURGY33

Dynamic Corrosion Studies33

Thermal-Convection-Loops33

Inconel Forced-Convection Loops36

INOR-8 Forced-Convection Loops38

Graphite Brazing Studies45

General Corrosion Studies53

Permeation of Graphite by Molten Salts53

Removal of Oxygen Contamination from Graphite59

Compatibility of INOR-8 and Graphite60

Corrosion Resistance of Brazing Alloys to Fluoride Fuel62

2.2 CHEMISTRY AND RADIATION EFFECTS65

Phase Equilibrium Studies65

The System LiF-BeF2-ZrF465

The System NaF-ZrF4-ThF465

The System NaF-ThF4-UF466

Phase Diagrams for Fluoride Systems68

Fission-Product Behavior and Reprocessing Chemistry68

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