Related by context. Frequent words. (Click for all words.) 64 radioactive materials 63 radioactive material 63 hazardous waste 61 radioactive 60 Yucca Mountain 57 coal ash 57 toxic waste 54 waste disposal 53 enriched uranium 53 waste 52 highly enriched uranium 52 plutonium 52 Nuclear Regulatory Commission 51 radioactivity 51 landfill 50 nuclear 49 nuclear reactors 48 reactors 48 sludge 48 landfills 47 reprocessing 47 uranium 47 groundwater 47 toxic chemicals 46 Nuclear 46 incinerator 45 tailings 45 wastes 44 reactor 44 low enriched uranium 43 Landfill 43 fuel rods 43 nuke 43 uranium mining 42 PCBs 42 dioxin 42 hazardous materials 42 NRC 42 enrich uranium 42 radiation 42 nuclear reactor 42 munitions 42 Waste 42 ash 41 mercury 41 radiological 40 contaminants 40 atomic 40 sediment 40 effluent 40 CO2 40 wastewater 40 Chernobyl 40 fissile material 40 Hanford 39 carbon dioxide 39 coal fired 39 nuclear weapons 39 arsenic 39 gasification 38 methane gas 38 pollutant 38 pollutants 38 coal 38 LNG 38 aquifer 38 nukes 38 uranium enrichment 37 liquefied natural gas 37 decommissioning 37 contaminant 37 asbestos 37 gases 37 solvents 37 Superfund 37 hydrogen 37 Vermont Yankee 37 Radiation 37 methane 37 toxic 37 radiation exposure 37 contamination 37 greenhouse gases 37 sewage 37 aquifers 37 hazardous 36 nuclear warhead 36 ordnance 36 atomic weapons 36 carbon capture 36 toxins 36 cubic yards 36 enriching uranium 36 benzene 35 polluting 35 silt 35 Atomic Energy 35 raw sewage 35 carbon 35 shale 34 warheads