Related by context. Frequent words. (Click for all words.) 64 containment vessel 61 reactor cores 59 reactor 55 Fukushima Daiichi 55 Fukushima Daiichi plant 51 fuel rods 51 Fukushima plant 51 radioactive steam 50 Fukushima Dai ichi 49 Nishiyama 48 seawater 48 Co TEPCO 48 radioactivity 47 reactors 47 partial meltdown 47 leaking radiation 46 Edano 46 Fukushima Dai ichi nuclear 46 Fukushima Daiichi nuclear 46 spent fuel rods 46 Fukushima 46 TEPCO 45 Tepco 44 Onagawa 44 tritium 44 spokesman Yukio Edano 43 coolant 43 Reactor 43 radioactive 43 Tokyo Electric 43 Fukushima nuclear 42 partially melted 42 steam generator 42 radiation leaks 42 radioactive substances 42 radiation 42 Dai ichi 41 condenser 41 nuclear fuel rods 41 nuclear reactor 41 containment dome 41 exterior walls 40 Browns Ferry 40 radioactive leaks 40 cooling 40 radioactive contamination 40 radioactive iodine 39 heat exchanger 39 leak 39 reinforced concrete 39 Secretary Yukio Edano 38 structural integrity 38 millisieverts 38 radioactive material 38 radioactive particles 38 Kashiwazaki 37 pressurized 37 Hidehiko Nishiyama 37 Calvert Cliffs 37 leakage 37 magma 37 containment 37 overheating 36 leaking 36 blowout preventers 36 cavern 36 foam insulation 36 toxic gases 36 casing 36 vapor 36 cesium 36 Jaczko 36 encase 36 ventilate 36 steam generators 36 ventilation 36 heat shield 35 bulkhead 35 superheated 35 Radiation 35 thermal conductivity 35 carbon monoxide 35 pressurization 35 radionuclides 35 contaminants 35 leaks 35 containment cap 35 cosmic radiation 35 radiation emitted 35 Kalpakkam 35 valve 35 valves 35 withstand earthquakes 35 hydrogen sulfide 35 pipework 35 bulkheads 35 nuclear reactors 35 blowout preventer 34 Daiichi 34 Diablo Canyon 34 radioactive isotope