AP1000介绍（英文原版）.doc

AP1000 The AP1000 is an advanced 1000 MWe nuclear power plant that uses the forces of nature and simplicity of design to enhance plant safety and operations and reduce construction costs. The Westinghouse AP1000 is a logical extension of its AP600 plant. Design studies have shown that a two-loop configuration could produce over 1000 MWe with minimal changes in the AP600 design. The primary purpose of developing the AP1000 was to retain the AP600 design objectives, design details and licensing basis, while optimizing the power output, thereby reducing the resulting electric generation costs. PASSIVITY AND SAFETY As in AP600, the AP1000 design uses passive safety systems to enhance the safety of the plant and to satisfy the Nuclear Regulatory Commission’s (NRC) safety criteria. These systems use only natural forces, such as gravity, natural circulation, and compressed gas. No pumps, fans, diesels, chillers, or other rotating machinery are used in the passive safety sub-systems. The passive safety systems include passive safety injection, passive residual heat removal, and passive containment cooling. All these passive systems have been designed to meet the NRC single-failure criteria and its recent criteria, including TMI (Three Mile Island) lessons-learned and unresolved/generic safety issues. Probabilistic Risk Assessment (PRA) tools have also been used to quantify the safety of the design. SIMPLICITY The passive safety systems are significantly simpler than the traditional PWR safety systems. They do not require the large network of safety support systems needed in typical nuclear plants, such as AC power, HVAC (heating, ventilation air conditioning), cooling water systems and seismic buildings to house these components. Simplification of plant systems, combined with increased plant operating margins, reduces the actions required by the operator. The AP1000 has 50 percent fewer valves, 83 percent less piping, 87 percent less control cable, 35 percent fewer pump