activation product active safety advanced gas-cooled reactor atomic energy regulatory board atomic nucleus beryllium brachytherapy crac-ii canadian nuclear safety commission ceramic chernobyl disaster common mode failure conflict of interest containment building core damage frequency critical mass criticality accident david hahn deep geological repository defence in depth demron depleted uranium deuterium dirty bomb dry cask storage economics of new nuclear power plants effects of nuclear explosions enriched uranium factor of safety fertile material finland fission product fusion power gamma camera graphite moderated reactor hazard heavy water reactor history of nuclear weapons international atomic energy agency ionizing radiation isotope separation isotopes of plutonium kernfysische dienst light water reactor list of civilian nuclear accidents list of civilian radiation accidents list of military nuclear accidents list of nuclear tests list of nuclear weapons list of states with nuclear weapons lithium magnox medical imaging minor actinide never events nuclear regulatory commission nuclear and radiation accidents nuclear arms race nuclear chemistry nuclear criticality safety nuclear energy nuclear engineering nuclear explosion nuclear fission nuclear fuel nuclear fuel cycle nuclear fuel response to reactor accidents nuclear fusion nuclear medicine nuclear meltdown nuclear physics nuclear power nuclear proliferation nuclear propulsion nuclear reactor technology nuclear reprocessing nuclear technology nuclear terrorism nuclear testing nuclear thermal rocket nuclear transmutation nuclear warfare nuclear weapon nuclear weapon design nuclear weapon yield pakistan nuclear regulatory authority passive nuclear safety plutonium pressure vessel pressurised heavy water reactor probabilistic risk assessment proton therapy rbmk radiation radiation therapy radioactive contamination radioactive waste radiological protection institute of ireland radioluminescence reactor protective system reactor building reprocessed uranium risk russia sstar safety culture scram spent fuel pool spent nuclear fuel spent nuclear fuel shipping cask steam explosion tnt equivalent thorium threat three mile island accident tritium underground nuclear testing united states atomic energy commission uranium uranium oxide waste windscale fire zirconium