2024. On March 28, 2017, the Office for Nuclear Regulation (ONR, UK) issued a Design Acceptance Confirmation for the AP1000 design, stating that 51 issues identified in 2011 had received an adequate response. However, the following day the designer, Westinghouse, filed for Chapter 11 bankruptcy in the U.S. because of $9 billion of losses from its nuclear reactor construction projects, mostly the construction of four AP1000 reactors in the U.S. In 2018, following an unsuccessful attempt to sell NuGeneration Toshiba decided to liquidate the company and abandon the project. Operations In March 2019 Sanmen Unit 2 was shut down because of a reactor coolant pump defect. A replacement pump has been shipped from the U.S. by Curtiss-Wright. There have been previous problems with these pumps, with several pumps returned from China. The pumps are the largest hermetically sealed pumps used in a nuclear reactor. Westinghouse and Curtiss-Wright are in a financial dispute over responsibility for the costs of pump delivery delays. See also Nuclear safety in the United States Nuclear power in the United States Nuclear power in China Nuclear power in the United Kingdom Nuclear power in Bulgaria Economics of nuclear power plants Nuclear Power 2010 Program References External links (Westinghouse AP1000 brochure). The AP1000 advanced 1000 MWe nuclear power plant AP1000 design review documents Revision 14. Fairewinds Associates Presentation AP1000 - extra risk of containment failure Nuclear power reactor types Nuclear power in China Nuclear power in the United States Nuclear power in Bulgaria Nuclear power in the United Kingdom