The power plant industry is a factory that converts various primary energy sources stored in nature into electrical energy (secondary energy). At the end of the 19th century, with the growth of electricity demand, people began to propose the idea of establishing an electricity production center. The development of motor manufacturing technology, the expansion of the scope of electric energy application, and the rapid growth of the demand for electricity in production have led to the emergence of power plants. There are various ways for power plants to generate electricity: thermal power plants that rely on thermal power, hydroelectric power plants that rely on hydroelectric power, and some power plants that rely on solar energy (photovoltaic) and wind and tidal power. Nuclear power plants powered by nuclear fuel have played an increasingly important role in many countries around the world.