Research and Development of Wet Winding Motor Reactor Coolant Pump for Generation 3 Nuclear Power Plant

Abstract

Within an eight-year period, starting in September 2011 and ending in July 2019, Shanghai Electric-KSB Nuclear Pumps & Valves Co., Ltd (hereinafter called SEC-KSB) has managed to develop a new pump type that can be used as reactor coolant pump (hereinafter called RCP) in generation 3 pressurized water reactor design. Wet winding motor reactor coolant pump (pump type RUV 650–870) is a customized and especially designed to meet the high safety criteria of generation 3 nuclear power plant, which is a hermetically sealed (without shaft seal system) type pump, and it is first time used as reactor coolant pump in pressurized water reactor in the worldwide. Started with the pump commissioning test in December 2014, total eight times high temperature and high-pressure full load testing had to be carried out in order to eliminate design or manufacturing flaws. In early 2019 within three months of intensive testing, under all the specified design transient scenarios, the RUV 650-870 pump had successfully passed all the qualification test items. On July 31. 2019 an expert qualification meeting was organized by China Machinery Industry Federation and China General Machinery Industry Association, the qualification committee states that the development of first set wet winding motor reactor coolant pump is successful in the worldwide, and the pump technical performance meet the requirements of the equipment specification, test specification and related industry standards, the RUV 650-870 pump can be used for nuclear power plant projects. On January 2022, the first production pump was delivered to nuclear power plant.