In commercial nuclear reactors, the highest cost is in the capital cost. However, when electricity is generated, the operational costs of nuclear energy are much lower than the capital costs. The costs of decommissioning and waste handling are usually fully included in the operating costs. When combined with system costs and social, health, and environmental costs, nuclear is very competitive with other forms of electricity generation, both coal and renewable energy. Ref: https://world-nuclear.org/information-library/economic-aspects/economics-of-nuclear-power.aspx