| 2006 №05 (04) | 2006 №05 (06) |
The Paton Welding Journal, 2006, #5, 19-25 pages
Development and certification of automatic narrow-gap argon-arc welding technology of MCP Dn850 elements at NPP
A.K. Tsaryuk1, V.Yu. Skulsky1, I.L. Kasperovich2, A.I. Byvalkevich2, T.V. Ostashko2, V.V. Zhukov2, S.N. Dudkin2, N.A. Ivanov2, A.P. Miroshnichenko3, N.V. Nemlej3, A.V. Bazhukov3
1E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.2Company «Atomremontservis», «Energoatom», Slavutich, Ukraine
3Company «Yuzhno-Ukrainskaya NPP», «Energoatom», Yuzhno-Ukrainsk, Ukraine
Abstract
Automatic narrow-gap argon-arc welding in gas mixture of 70 % He + 30 % Ar using 0.8–0.9 mm diameter welding wire Sv-08G1NMA was employed to Join elements of the main circulation piping (MCP) Dn850 of clad steel 10GN2MFA to steam generator branch pipes. The technology suggested passed the research and industrial certification to advantage, was approved by the State Inspection Body of the State Nuclear Regulatory Committee of Ukraine and recommended for Joining elements of MCP Dn850 when replacing steam generators at NPP. The automatic narrow-gap argon-arc welding technology will allow significant reducing labor content of welding operations, increasing productivity, reducing amount of deposited metal and level of residual welding stresses, and ensuring high quality of weldedJoints and significant reducing dose of radiation action on the personnel performing welding operations.
Keywords: automatic argon-arc welding, welding technology, narrow-gap groove, nonconsumable electrode, helium, argon, weld metal, welded joints, physical-mechanical properties of metal, steam generator, piping
References
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