Isotope of _____ is used as a fuel in nuclear reactors.
uranium
iodine
helium
sodium
The following questions are about the nuclear reactor of a power plant. (a) Which isotope of uranium produces the energy in the fuel rods? (b) Will the fuel rods last forever? (c) Is the energy produced by nuclear fission or nuclear fusion greater? (d) What is the purpose of using the graphite moderator? (e) What is the function of boron rods in the nuclear reactor? (f) Why is liquid sodium (or carbon dioxide gas) pumped through the reactor?
Helium is used as a coolant, mostly in nuclear reactors.