neutron, [26], [28]
nucleus, [27], [29]
pitchblende, [23]
plutonium, [46]
power plant, [42]
pressurized water reactor, [43]
proton, [26]
radioactivity, [22]
radioactive cocktail, [64]
radioactive iodine, [57]
radioisotope, [52], [64]
radium, [23], [30], [32]
Roentgen, Wilhelm K., [18]
thorium, [23], [30]
tracers, [53]
uranium, [20], [29], [30], [32], [43]
uranium-234, [29]
uranium-235, [29], [46]
uranium-238, [29], [46]