In nature, uranium is found as uranium-238 (99.2742%) and uranium-235 (0.7204%). Isotope separation concentrates (enriches) the fissionable uranium-235 for nuclear weapons and most nuclear power plants, except for gas cooled reactors and pressurised heavy water reactors. Most neutrons released by a fissioning atom of uranium-235 must impact other uranium-235 atoms to sustain the nuclear chain reaction. The concentration and amount of uranium-235 needed to achieve this is called a 'critical mass'.
Along with gas cooled reactors, what type of reactor doesn't use uranium-235?
pressurised heavy water
Isotope separation concentrates (enriches) the fissionable uranium-235 for nuclear weapons and most nuclear power plants, except for gas cooled reactors and pressurised heavy water reactors.
Isotope separation concentrates (enriches) the fissionable uranium-two hundred thirty-five for nuclear weapons and most nuclear power plants, except for gas cooled reactors and pressurised heavy water reactors.
Along with gas cooled reactors, what type of reactor doesn't use uranium-two hundred thirty-five?