Ansaldo Nucleare has provided a significant support to the passive plant technology development and, starting from 2000, is cooperating with Westinghouse to the development of AP1000 Plant. The AP1000 is a two-loop 1117 MWe Pressurized Water Reactor (PWR). It is based on proven technology, but with an emphasis on safety features that rely on natural driving forces, such as pressurized gas, gravity flow, natural circulation flow and convection. On 24th of July 2007 Westinghouse Electric Co. signed landmark contracts with China’s State Nuclear Power Technology Corporation (SNPTC), to provide four AP1000 nuclear power plants in China. In this framework, Ansaldo Nucleare, in Joint Venture with Mangiarotti Nuclear, has signed a contract with Westinghouse for the design and the supply of innovative components to be installed in the first AP1000 unit to be constructed in the Sanmen site. The contract includes the design of the Steel Containment Vessel, preparation of construction and fabrication Specifications, design and Supply of SCV Mechanical Penetrations, Air Locks and Equipment Hatches. Moreover, Ansaldo Nucleare is in charge of the final design of the AP1000 PRHR-HX and together with Mangiarotti Nuclear will supply the component for the Sanmen Unit 1 NPP. The paper presents an overview of the design and manufacturing activities performed by Ansaldo Nucleare and its partners for the AP1000 plant in China.

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