Nuclear power plants 681 Nuclear energy 181 Safety measures 154 Nuclear industry 118 Accidents 97 Law and legislation 87 Licenses 87 Government policy 77 Environmental aspects 73 Nuclear reactors 60 Power resources 57 Radioactive waste disposal 56 History 50 Nuclear weapons 49 Research 48 Design and construction 46 Risk assessment 37 Energy policy 36 Nuclear facilities 36 General 35 Management 34 HISTORY 32 Safety regulations 31 Nuclear physics 30 POLITICAL SCIENCE 30 Nuclear accidents 28 Politics and government 27 Pollution 27 Arms control 25 Renewable energy sources 25