Abstract: The positions of the water intake inlet and the water discharge outlet of Qinshan Nuclear Power Station project phase II and the form of water intake engineering were optimized. Some practical examples in thermal power plant construction in the northern region, the rich in coal and waterdeficient region, were analyzed, which include to adopt direct or indirect air cooled unit, to utilize the urban reclaimed water from the sewage treatment plant as supplement water for power plant, to adopt the form of water treating island to arrange the water system of the power plant and so on. The necessity of optimized design of water engineering system for thermal power plant and nuclear power station was expounded. The result of this paper provides reference for similar power plants in water engineering system design.

Key words: air cooled unit, urban reclaimed water, positions of water intake inlet and water discharge outlet, water treating island, optimized design