核主泵制造的基础理论问题研究进展

Fundamental Theory on Manufacture of Main Coolant Pump in Nuclear Power Plant

本文综述了国家重点基础研究发展计划项目"核主泵制造的关键科学问题"项目组在核主泵全工况超长使役安全评价理论、高放射性高温高压流体宏微流动规律及其流固热强耦合作用机理,以及核主泵过流表/界面洁整化理论等三方面所取得的基础理论研究结果。代表性地介绍了核主泵与强关联系统各要素间的交互作用机理,工况极端变化下特殊工质在过流部件内作用规律,密封和轴承的静态和动态特性分析方法,核主泵零部件表面污染产生机理及其对系统造成危害的作用规律,加工制造过程中零部件高表面完整性形成机理及工艺规划策略等典型结果,旨在为核主泵制造的关键技术创新与应用提供理论基础和技术支撑。

This paper reviews recent theoretical achievements made in the key scientific difficulties for manufacture of main coolant pump in nuclear power plant by the research group of National Basic Research Program of China(973 Program),mainly involving the following three aspects,i.e.safety assessment theory for overall performance of MCPs in an extra-long term service,macro-micro flow behaviors of high-radioactivity,high-temperature and high-pressure fluid and associated strong thermo-hydro-mechanical coupling mechanisms,and surface/interface integrity theory for manufacturing hydraulic components of MCPs,respectively.Representative results are introduced for interaction mechanism between MCPs and other key components in the strongly coupled system,flow interaction behavior of the specific working fluid in flow-passage of hydraulic components in MCPs with extremely varied working conditions,static and dynamic characteristics analysis approaches for mechanical seals and bearings,and formation mechanism of surface contaminations on manufactured components of MCPs and their deteriorating effects on the whole system,and high surface/interface integrity generation mechanism during manufacture of components and the process planning strategy,etc.The achievements provide fundamental theories and advanced technologies supporting key technical innovation and application in the manufacture of MCPs.