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Samples from Idaho National Laboratory's Advanced Test Reactor (ATR) core will be sent to Argonne's ATLAS particle accelerator for analysis to learn the characteristics of the nuclear material. Powered up, the fuel plates can be seen glowing bright blue. The core is submerged in water for cooling. The ATR is primarily designed and used to test materials to be used in larger scale and prototype reactors. It can operate at a maximum power of 250 MW and has a "four leaf clover" design that allows for a variety of testing locations. The unique design allows for different flux in various locations and specialized systems also allow for certain experiments to be run at their own temperature and pressure. The ATR is ordinary (light) water moderated and cooled, with a beryllium neutron reflector. It is pressurized and housed in a stainless steel tank. As well as its role in materials irradiation work, ATR is the USA's only source of Cobalt-60 for medical applications.
