Power plant industry is a plant that converts various primary energy contained in nature into electrical energy (secondary energy). At the end of the 19th century, as the demand for electricity increased, people began to propose the idea of establishing a power production center. With the development of motor manufacturing technology, the expansion of the application range of electric energy, and the rapid increase of electricity demand in production, power plants have also come into being. Power plants generate electricity in a variety of ways: thermal power plants are called thermal power plants, hydro power plants are called hydro power plants, and some power plants rely on solar (photovoltaic) and wind and tidal energy to generate electricity. Nuclear power plants using nuclear fuel as energy are playing an increasing role in many countries in the world.