Design&Experimental Study Of Type XXX Condensation Pump In Secondary Loop Of Nuclear Power Plant

In this paper, based on "***" project, focus on three difficulties in localization of condensate pump nuclear power project urgent to be resolved: no negative performance deviation, high vibration noise level requirement (extremely important acceptance standard), effect on water supply method changed for mechanical seal. By design and research such as theoretical calculation and experiment, according to the purchasing contract for Condensate Pump signed between Shenyang Blower Works (Group) Co., Ltd. and a domestic nuclear power plant, TypeXXX Condensate Pump for a nuclear power project is designed and developed.In order to avoid negative performance deviation, optimized hydraulic design combined with similar performance curve for real pump type are applied to final design of wetted components to ensure no negative deviation in performance, flow, head and efficiency, and no positive deviation in NPSH. In order to meet the strict requirement on vibration and noise, optimized structure design, rotor dynamic characteristics analysis, and re-calculation&verification of main components are used to ensure that the requirement on vibration and noise can be met for pump unit. Finally, to reveal effect on water supply method adjusted for mechanical seal, the changed mechanical seal is researched, and cases in the international well-known pump companies are referenced and learned. Simulation verification of real pump type in our company is carried out. Vigorous investigation and analysis of the problems are made.Because the "***" project is for a contract, design and test must strictly comply with some relative paragraphs and requirements in the specification. After research, design, test and commissioning in two years, the power plant is successfully finished and put into trial operation.In this article, in the view of engineering, the three difficulties faced are researched, analyzed and to be resolved. There are so many engineering verifications. Theory calculation is combined with similar pump type to provide the theoretical and experimental approaches and reference to similar pumps or the required case.