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Advanced Test Reactor

Advanced Test Reactor. ATR vs Commercial Reactor. Confinement Structure Operating Conditions 390 psi 140 degrees F Reactor Core 4 feet x 4 feet 880 pounds 21 pounds of uranium. Commercial Reactor. ATR. Containment Structure Operating Conditions 2600 psi 550 degrees F Reactor Core

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Advanced Test Reactor

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  1. Advanced Test Reactor

  2. ATR vs Commercial Reactor • Confinement Structure • Operating Conditions • 390 psi • 140 degrees F • Reactor Core • 4 feet x 4 feet • 880 pounds • 21 pounds of uranium Commercial Reactor ATR • Containment Structure • Operating Conditions • 2600 psi • 550 degrees F • Reactor Core • 12 feet x 15 feet • 154 tons • 12,000 pounds of uranium

  3. 1977 1967 1987 1997 2007 1st Core Internals Changeout (CIC) 1972 Start of Operations (6 loops 1967) Plant Protective System Upgrade 2006 Increased number of loops from 6 to 8 1973 5th Core Internal Changeout (CIC) 2004 6th Core Internal Changeout (CIC) 2010 2nd Core Internals Changeout (CIC) 1977 9th Loop Facility Installed, Improved Loop Capabilities 1980 3rd Core Internal Changeout (CIC) 1986 Irradiation Test Vehicle (ITV) Installed 1999 Lead Experiment Facility Installed 1984 Loop Control System Replaced & 4th Core Internal Changeout (CIC) Decreased Active Loops to 5 1994 External Secondary Piping & Cooling Tower Replacement 1998 Reactor Control Room Replaced 1989 Process Control Room Replaced & Core Reconfigured 1993 ATR Timeline

  4. ATR Specifications • Reactor Type • Pressurized, light-water moderated and cooled, beryllium reflector • Reactor Vessel • 3.65 m diameter cylinder, 10.67 m high • Stainless steel • Reactor Core • 1.22 m (diameter & height) • 40 fuel elements, high enriched U-235

  5. ATR Specifications (continued) • Coolant Inlet Temperature & Pressure • 52°C, 2450 kPa • Thermal Power & Flux • Maximum Total Core Power – 250MW • Approximate Peak Flux Values (Unperturbed) • 1 x 1015 n/cm2–sec thermal • 5 x 1014 n/cm2-sec fast

  6. ATR Specifications (continued) • Hafnium Reactivity Control Drums/Rods • Maintains Axial Flux Shape During Operating Cycle • Flux/Power Adjustments Among Core Lobes/Flux Traps • Irradiation Facilities 77 • Reflector Positions 68 • Flux Traps 4 • In-pile Tubes 5

  7. b Outer North Irradiation Tank “B” Position H1 H16 H2 H3 H15 Fuel Element 1 H4 H14 3 H13 H5 Neck Shim Rod (1-6 Typical) 2 H12 H6 H11 H7 H10 H8 H9 Large Loop Irradiation Facility ITV “H” Position M-1 M-3 M-2 M-3 MICE Inboard “A” Position (1-8) Safety Rod Outer Shim Control Cylinder Outboard “A” Position (9-16) Standard Loop Irradiation Facility 1 6 2 7 5 3 4 “I” Position South and East Flux Trap Irradiation Facilities Outer South Irradiation Tank ATR Core Cross Section

  8. ATR Vessel & Internals

  9. Irradiation Test Vehicle

  10. ATR Standard Loop Layout Loop Closure Plugs Line Heaters Pressurizer Heat Exchanger Reactor Core IonExchangeColumns Pumps Loop Inlet and Outlet Piping Operating Console

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