As countries plan their low carbon energy strategies for the future, nuclear cogeneration—using nuclear power plants not only for electricity generation but also to provide simultaneously electricity and heat for applications such as district heating, hydrogen production, water desalination or to support industrial processes—is emerging as an attractive option for decarbonizing of various energy consuming sectors, while also boosting the efficiency of nuclear power plants. The publication includes an overview on the use of nuclear energy for cogeneration applications to achieve a future with clean and sustainable energy. It aims to increase the understanding of the role of nuclear cogeneration in climate change mitigation and to showcase the experience available in several Member States in the field of nuclear cogeneration. The publication is intended for decision makers, managers and engineers involved in nuclear cogeneration projects.