压水堆核电厂主管道静态铸造质量控制措施的研究

Study on Quality Control Measures of Static Casting Main Pipe in PWR Nuclear Power Plant

文章分析确定了影响压水堆核电厂M310堆型主管道弯头静态铸造质量的主要原因。从加强对原材料的精选、检验,改进砂型制作工艺和浇注工艺,提高人员精益管理水平,减少人因失误3个方面制定了质量控制措施,福清1、2号机组主管道静态铸造弯头的铸造缺陷均下降到只有实施前项目缺陷总数的50%以下,静态铸造的质量得到有效提高,节省了处理缺陷的成本,也赢得了产品交付进度。制定的质量控制措施对核电主管道设备的铸造工艺改进有良好的借鉴意义,也为进一步研究主管道静态铸造质量控制措施积累了宝贵的经验。

This study analyzes the main reasons which impact the quality of primary pipe static casting elbows in PWR-M310 nuclear power plant. The quality control measures are developed from the election and inspection of material, improving sand production and caking process, improving lean management of personnel. The static casting defects of Primary pipe elbows for Fuqing Unit 1 ＆ 2 were clown to less than 5（P/0 of the former project. The quality of static casting for the primary pipe elbows was significantly improved. Moreover, the implementation saves human resources and financing to repair casting defers, and also helps to win the delivery schedule. The quality control measures are good reference for improving primary pipe casting process. This study provides valuable experience for fl^her study of improving the quality of static casting for the primary pipe of PWR nuclear power plant.