Quantitative Analysis of Fit-up Accuracy for Field Narrow Gap Orbital TIG Welding of Primary Piping in PWR Nuclear Power Plants
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摘要: 核电厂主管道现场焊接采用的窄间隙钨极惰性气体保护电弧焊(TIG)自动焊对组对精度的要求比较高。本研究建立了一回路组对三维几何模型,并在此基础上定量分析主设备制造尺寸、安装尺寸对组对精度的影响,甄别出需要控制的关键因素。根据分析结果对施工方案提出了建议。Abstract: Field Narrow Gap Orbital TIG（NGOT） welding of the primary piping requires much more strict fit-up accuracy.To satisfy this requirement,a 3-D geometric computer model was developed to conduct the quantitative analysis of the relationship between fit-up accuracy and variables in the manufacture and in-stallation process.The essential variables were identified and recommendations were given for the construc-tion program based on the analysis results.
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Key words:
- Primary piping /
- Narrow Gap Orbital TIG welding /
- Fit-up accuracy /
- Quantitative analysis
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