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| Technology for 1 000 MW shaft sealed reactor coolant pump |
| FENG Xiaodong1, WU Dazhuan2, YANG Lifeng1, JIA Yun1 |
| 1.Harbin Electric Power Equipment Co. Ltd., Harbin, Heilongjiang 150066, China; 2.Institute of Process Equipment, Zhejiang University, Hangzhou, Zhejiang 310027, China |
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Abstract As high-end equipment in pump industry, CNP1000 shaft sealed reactor coolant pump(RCP)in the primary loop system of pressurized water reactor(PWR)in a nuclear power plant is the only equipment which cannot be manufactured domestically. Therefore, the independent design, manufacturing and test of this kind of pump are important and difficult tasks in promoting the nationalization of nuclear technology in China. In the paper, the domestic technological situation and structural characteristics of 1 000 MW shaft sealed RCP are introduced briefly, and the design principle and technical implementation requirement are elaborated in terms of pressure retaining boundary, hydraulic components, pump rotor system, heat insulation subassembly, shaft seal, standstill seal, lower guide bearings, thrust bearing, integrated oil pump, oil seal, auxiliary system and key equipment in detail. Through an analysis on export restriction and application prospect of various types of RCP, it is shown that shaft sealed RCP has more strength in export and will occupy a dominant position in the nuclear equipment market for a long time. Presently, several key technologies, such as shaft seal, hydraulic components, full-load test and so on have been nationalized in a few domestic factories, but the theoretical principle of RCP is still not well established and needs to be explored further. Hence, as an important mission, the nationalization of RCP still requires a long time to be tackled.
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Received: 19 July 2015
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