Safeguards Against Weapons
A nuclear reactor is not a potential bomb, and its fuel is not an explosive. The raw material in nuclear weapons can only be made by a substantial military project. Nine nations have developed nuclear weapons. More that 190 governments have committed not to develop such weapons - and have accepted IAEA inspections designed to detect a nuclear weapons project. All nuclear material requires rigorous care. But the use of nuclear energy to make electricity has not contributed to the danger of nuclear weapons or to their proliferation.
Security of Nuclear Plants
Nuclear power plants are extremely robust in design. Indeed, they rank among the strongest structures ever built. For external protection, these natural defenses are fortified with security controls and guard forces. Although not impervious to every imaginable attack, most reactor designs would prevent a release of radioactivity even in an improbably worst-case scenario.