Nuclear power is the technology involving the nuclear fission reactions. The science of nuclear reaction was started in the late 19th century. However, the nuclear power technology was only reliable since 1942. Until present, the nuclear technology has undergone three technological generations and the generation IV is expected to be available in 2040. Nuclear energy contributes to about 11% of total world electricity production. In this short report we briefly look over the development and contribution of the nuclear power technology.