![]() ![]() Material that can sustain a nuclear fission chain reaction is said to be fissile or fissionable. In words this would be: A uranium-235 atom absorbs a neutron to become uranium-236 which then undergoes fission to form the products xenon-140 and strontium-93. 1 This high fission yield results in an abundance of cesium-137 in spent nuclear fuel, as well as in regions contaminated by fission byproducts after nuclear accidents. Fission of various isotopes of thorium, uranium, and plutonium all yield about 6 cesium-137. It also doesn’t produce highly radioactive fission products. Cesium-137 is among the most common heavy fission products. ![]() This is the same process that powers the sun and creates huge amounts of energyseveral times greater than fission. In addition to these generation III and III+ type of reactors. The vast majority of the waste (90 of total volume) is composed of only lightly-contaminated items, such as tools and work clothing, and contains only 1 of the total radioactivity. Both reactors are designed to run using UO2 fuel types enriched with fissile uranium to 3-5. If this process continues, a nuclear chain reaction occurs. Fusion Fusion occurs when two atoms slam together to form a heavier atom, like when two hydrogen atoms fuse to form one helium atom. There are three types of nuclear waste, classified according to their radioactivity: low-, intermediate-, and high-level. \): The fission of a large nucleus, such as U-235, produces two or three neutrons, each of which is capable of causing fission of another nucleus by the reactions shown. ![]()
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