Introduction Welding is one of the important basic industrial technoligies， which is related to the safe and stable operation of nuclear power equipment. Considering that the R&D technologies are not sufficient， the production and testing methods are not advanced， and the key welding materials， welding equipment and testing devices are imported， the nuclear power plant construction progress and development meet a large number of “bottleneck” issues.
Method To learn the current development of nuclear power welding industry and diffenrence between the current technologies and the international advanced technologies， Shanghai Municipal Nuclear Power Office visited and investigated a large number of manufacturing enterprises， universities， research institutes and construction enterprises.
Result Based on the market demands， it demonstrated that the enterprises in the nuclear industry relied on and supported each other， and the technical difficulties and research direction were found. Based on the nuclear industry base and responding to the state and local industry policies， it gives the scheme on application of efficient and reliable welding technology， welding materials， welding processes and testing.
Conclusion It explores a new mode of mutual symbiosis and cooperation between the upstream and downstream enterprises of the nuclear industrial chain， and puts forward the path of promoting welding localization and intelligentize development in nuclear industry.
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