Design and layout of nuclear heating stations provided for cogeneration of hot water and process steam

In this paper possibilities of extending supply mission of nuclear heating stations by provision of both hot water for district heating and steam for industrial consumers are studied. Based on applying a method developed for hot water generation only, trends in the heat-engineering design of a nuclear heating station designated to cogeneration of hot water and process steam are derived. Results of calculations show that in the case of larger amounts of process steam to be generated modifications of the reactor of the AST-500 type nuclear heating station developed in the USSR for hot water generation only would have to be provided. Lower amounts of steam might be provided by slightly increasing core pressure with no changes in the design of the primary coolant circuit. (author)