在役核电站蒸汽发生器返修堵管自动焊工艺研究

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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

1序言

为了应对全球气候变化带来的严峻挑战,能源低碳化转型已经是世界各国共识及中长期目标[1],中国也在2020年提出了“双碳目标”,其中煤炭作为我国能源体系结构中的主要基础性能源,已经开始在以煤、油、气、电、核,以及新能源和可再生能源的多样化能源体系中消费比重逐年下降,能源的利用向着清洁化、低碳化的方向发展。(剩余4780字)

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