在役核電站蒸汽發(fā)生器返修堵管自動(dòng)焊工藝研究

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Abstract： Inorder to prevent leakage of radioactive material from the primary circuit due to the damage of heat transfer tubes，an automatic welding technology for repairing these tubes in steam generator is proposed in this paper.Using the“self-melting ring”structure and the segmented welding approach，a set of automatic welding process parameters are obtained by optimizing the welding parameters and the heat input.Through this process，the welds of the tubes have good root fusion， surface forming and mechanical properties.

Keywords： nuclear power in service； steam generator； heat transfer tube； repairing； plugging； automatic welding process

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為了應(yīng)對全球氣候變化帶來的嚴(yán)峻挑戰(zhàn)，能源低碳化轉(zhuǎn)型已經(jīng)是世界各國共識(shí)及中長期目標(biāo)[1]，中國也在2020年提出了“雙碳目標(biāo)”，其中煤炭作為我國能源體系結(jié)構(gòu)中的主要基礎(chǔ)性能源，已經(jīng)開始在以煤、油、氣、電、核，以及新能源和可再生能源的多樣化能源體系中消費(fèi)比重逐年下降，能源的利用向著清潔化、低碳化的方向發(fā)展。（剩余4780字）