Fast Flux Test Facility

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Fast Flux Test Facility

• Teresa Bailey
• Mollie Rock

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History of FFTF

• Construction completed in 1978
• Initial startup in 1982
• Operated for 10 years
• Shut down in December 1993
• Currently on Hot Standby

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Past Modern Uses

• Isotope Production
• Medical Industrial
• Pu-238 Production
• Space Reactors
• Materials Testing
• Nuclear Industry
• LMR Breeder Reactors
• Fusion Materials Testing
• Tritium Production from Li20

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Future Uses

• Nuclear Science
• Resonance Cross Section Measurements
• Electronic Component Hardening
• Space Semi-conductors
• Transmutation of Waste
• Tests Feasibility

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Core
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Core Continued...

• Reactivity Adjustment
• In-core Neutron Absorber Assembly
• 9 Control Rods in Y Position
• Hexagonal Shaped Core
• Core Support Structure
• Life of 20 years
• Maintains Core Configuration
• Open Test Assemblies

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Vessel
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Vessel Continued...

• Three coolant inlet nozzles into vessel
• Coolant flows vertically upward
• Eleven shield plates beneath upper forging
  provide
• Thermal insulation
• Radiation shielding
• Sodium vapor deposition

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Containment
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Containment Continued...

• Containment Isolation System (CIS)
• Closes inlet and exhaust ventilation valves if
  activity exceeds present limits
• Backed up by redundancy
• Structural requirements
• Dead Load
• Live Load
• Wind Load
• Tornado Loading
• Seismic Loads
• Pressure and Thermal Loads
• Snow Load

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Heat Transport System

• Three Loops
• Primary Heat Exchanger and Pump
• Secondary Heat Exchanger and Pump
• Dump Heat Exchanger
• 12 modules
• Heat rejection and generation matching
• Dumped to atmosphere

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Core Component Transfer

• Closed Loop Ex-Vessel Handling Machine
• Interim Exam and Maintenance Cell
• Interim Decay Storage
• Bottom Loading Transfer Cask

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Interim Examination Maintenance Cell (IEM Cell)

• Non-destructive examination of test assemblies
  and core components
• Controlled internal Argon atmosphere
• Sodium cleaning station
• Remote tools
• Electro-Mechanical Manipulator
• Used to wash Sodium off of Spent Fuel

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Safety Mechanisms

• Control Rod Placement
• Reactor power control
• Negative Temperature Coefficient
• Reactor Shutdown System
• Interrupt power to control rods SCRAM
• Interrupt power to pumps
• Containment Isolation System
• Passive Decay Heat Removal

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Closed Loop Testing

• Never been used
• Isolated from coolant system
• Separate coolant system
• Basically a side loop used to irradiate samples