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ORNL-3215

MOLTEN-SALT REACTOR PROGRAM

PROGRESS REPORT

For Period From March 1 to August 31, 1961

SUMMARYiii

PART I. MSRE DESIGN, COMPONENT DEVELOPMENT, AND ENGINEERING ANALYSIS

1. MSRE DESIGN1

1.1 Introduction1

1.2 Reactor Core and Vessel2

1.3 Primary Heat Exchanger4

1.4 Radiator4

1.5 Fuel-Salt Drain Tanks4

1.6 Equipment Layout8

1.7 Cover-Gas System11

1.8 System Heaters12

1.9 Design Status of Remote-Maintenance Systems13

1.9.1 Maintenance-Design Systems13

1.9.2 Remote Maintenance by Manipulators13

1.9.3 Remote Maintenance by Manual Operations14

1.9.4 Assembly Jigs and Fixtures15

1.9.5 Graphite-Sample Removal15

1.10 Reactor-Control Design16

1.11 Design Status of Building and Site19

1.12 Reactor Procurement and Installation19

1.12.1 Demolition and Minor Alteration Work to Building 750319

1.12.2 Major Modifications to Building 750320

1.12.3 Procurement of Materials20

1.12.4 Procurement of Components20

1.13 Reactor Instrumentation and Controls Design21

1.13.1 Instrument Application Diagram21

1.13.2 Electrical Control Circuitry21

1.13.3 Layout21

1.13.4 Main Control Board22

1.13.5 MSRE Data-Handling Study24

1.13.6 Single-Point Temperature Alarm System25

2. COMPONENT DEVELOPMENT28

2.1 Freeze-Flange Development28

2.1.1 MSRE 5-in. Flanges28

2.1.2 Freeze-Flange-Seal Test Facility28

2.2 Freeze Valves32

2.3 Heater Tests33

2.3.1 Pipe Heaters33

2.3.2 Core Heaters33

2.4 Drain-Tank Coolers37

2.5 Sampler-Enricher Development37

2.5.1 Sampler-Enricher Concept37

2.5.2 Solder-Freeze Valve37

2.5.3 Sample Capsule40

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