Nuclear power units has low fuel cost

zero pollutant and carbon dioxide discharge

using nuclear power unit to supply heat can better meet the needs of social and economic development in China. By taking an AP1000 third generation million-kilo watt level nuclear power unit as an example

this paper compares and analyzes two heat supply schemes including high-level extraction and hot re-extraction extraction

and introduces the influence of each extraction scheme on economy and safety of the unit. The results show that

the high-discharge extraction scheme is the most economical scheme and has a better comprehensive technical economy.