Abstract：The world desires to reduce greenhouse gas emissions and air pollution. Many researchers believe that one key method is greater use of nuclear energy to reduce fossil fuel consumption. NHR200-Ⅱ, a small, modular pressurized water reactor that produces 1.6 MPa saturated steam, can be used for district heating, industrial steam, seawater desalination, and remote power generation. NHR200-Ⅱ has integrated system components, full-power natural circulation, self-pressurization, passive safety systems, and an intermediate isolation loop. The design essentially eliminates the possibility of large radioactivity releases, so off-site emergency measures are probably unnecessary so NHR200-Ⅱ can be constructed near large cities and end-users, which is essential for district heating systems. At the same time, the simplified system design, convenient operation, and minimal radioactive waste make NHR200-Ⅱ very economically competitive. Experience with a test reactor and more than three decades of research has shown that this technology is mature and ready for demonstration projects.
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