Through various examples and factors, the plan is to show the advantages and disadvantages of nuclear energy, where it originated, how it can be used. The first part discusses nuclear energy in general, fossil fuels and where they came from. Through the final work, a comparison was made between various energy producers, both pure and fossil. It also focuses on the economic side of the whole production story. The example will show the profit and loss of the construction of such a power plant, how nuclear energy is viewed by other countries in the world, some superpowers as well as smaller countries. Upon completion, it is important to note where and how nuclear power generation should move into the future. One such factor is thorium, which is also addressed. It will also describe the mode of operation and types of nuclear power plants, how nuclear energy is generated, the chain reaction process, show why certain types of nuclear power plants are better than others. The analysis of the latest data and the current state of application of nuclear energy in the power industry with the presented results is being carried out. Since safety is a big factor in the whole story of nuclear power, various ways of testing safety during and after construction will be shown.