Nuclear power engineering is the use of nuclear fission or nuclear fusion reaction released energy to generate electricity. Nuclear power plants, which are currently in commercial operation, use nuclear fission to generate electricity.

Nuclear power plants are generally divided into two parts: the nuclear island (including the reactor unit and the primary circuit) and the conventional island (including the turbo-generator system) that uses steam to generate steam using nuclear fission.

Now the most popular civilian nuclear power plants are mostly pressurized water reactor nuclear power plant, its working principle is: the use of uranium made of nuclear fuel in the reactor fission and release a large amount of heat; high pressure circulating cooling water to heat, Steam is generated in the generator to propel the generator to rotate.