The Calder Hall nuclear power station in the United Kingdom, recognized as the world's first commercial nuclear power plant, continues to be the focus of specialists' attention 70 years after its launch—this time in connection with its decommissioning process. The station was opened in 1956 and for decades served as an important milestone in the development of civil nuclear power, demonstrating the possibility of practical application of atomic energy for electricity production on an industrial scale. Today, teams of engineers and nuclear safety specialists are carrying out work on the safe dismantling of the station. The decommissioning process of such facilities requires strict compliance with radiation safety standards, phased withdrawal of equipment, and prolonged monitoring of the site's condition. Such projects are considered complex and lengthy, given the need to handle radioactive materials and infrastructure created using mid-twentieth century technologies. The historical significance of Calder Hall lies in the fact that the station was the world's first to be connected to a national power grid exclusively for commercial purposes, opening the path for the development of nuclear energy in many countries. Despite the completion of its operational period, specialists note that the experience accumulated during the construction and operation of the station remains important for the modern nuclear industry. The process of decommissioning the facility is regarded as part of a broader program to safely close obsolete nuclear installations in the United Kingdom. Work is being conducted in accordance with modern standards of environmental and radiation safety, and the station itself remains a symbol of the beginning of the atomic era in energy production.