Using nuclear power as alternative source

Paper represents perspectives for wider usage of nuclear power as one of the alternative sources. Paper studies nuclear reactions and their general principles, classification of various radioactive isotopes and chain reactions. Here are given calculations of thermal power, radioactive products power, changes of neutron current in reactor and irregularity factor of neutron current. Power reactors are classified: by neutron energy that initiates decomposition reaction as thermal reactors and speed ones; by usage of fuel as multiply reactors and converters: by their structure as heterogeneous and homogeneous reactors; by cooling and moderating types as water, heavy water, water-graphite, gas, channel and complex reactors.