b'ATR: Advanced Test ReactorScience has discovered safe ways to control and use radiation, like X-rays, cancer medicine, energy, and to kill germs. Submarine Compartment LocationIn science fiction movies, nuclear materials always glow eerily.The U.S. Navys nuclear-powered This neon blue color is based on asubmarines propel themselves scientific reaction called Cherenkovthrough the ocean using onboard Radiation after the Russian physicistnuclear reactors. The reactor for the who discovered it in 1934.Thisfirst nuclear submarine, the phenomenon happens when aUSS Nautilus, was tested at INL.radioactive charged particle moves through water faster than light can.Nuclear fuel in ATR is surrounded by water that is used to safely cool the reactor. As the fuel decays, it emits radioactive gamma rays that excite ATR is the worldsthe waters electrons. The excitement premiere test reactor andcauses the electrons to release energy has many important usesin the form of photons, or visible from supporting the Navyslight. When the photons move faster nuclear- powered fleet, tothrough water than light can, they producing plutonium 238create the blue glow! for RTGs. It also producesGamma rays can also move through cobalt 60, which emitsthe skin to kill cancerous cells. But super-energized waves oftoo much radiation is dangerous for radiation called gamma rays used to treat brain tumors.humans because it can damage good cells. The sun emits radiation, so we This unique pressurized water test reactor operates at low temperatureswear sunscreen outdoors.Scientists and its core coils like a giant snake to allow 77 testing positions to bombardand workers at ATR wear special nuclear materials with different power levels. This core is only 50 cubicprotective suits to limit exposure to feet, compared to the 1700 cubic feet in commercial power reactors. ATRharmful radiation. These suits are may be relatively small in size, but its impact in nuclear research is huge! just one of many INL safety rules that keep everyone, including you and the 20 environment healthy.21'