The Paton Welding Journal, 2013, №06



2013 №06 (04)

2013 №06 (06)

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The Paton Welding Journal, 2013, #6, 28-33 pages  

APPLICATION OF AUTOMATIC ORBITAL WELDING IN MANUFACTURE OF HOUSINGS OF NEUTRON MEASUREMENT CHANNELS OF NUCLEAR REACTORS

N.M. MAKHLIN¹, V.E. POPOV¹, N.S. FEDORENKO¹, A.V. BURBA¹, V.M. PYSHNY², V.A. DYUKOV³ and V.B. GONTAREV³

¹SE REC WCPE of the E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine. E-mail: techno@paton.kiev.ua
²SE NNEGC «Energoatom», Kiev, Ukraine. E-mail: 1.kizmenko@direkcy.atom.gov.ua
³SS «Energoeffektivnost» of NNEGC «Energoatom», Kiev, Ukraine. E-mail: ee@eff.atom.gov.ua
 
 
Abstract
Up to present time neutron measurement channels were mainly delivered in Ukraine from abroad. Therefore, problem of improvement of operating characteristics and mastering of domestic production of such channels is highly relevant. Application of automatic non-consumable electrode orbital welding was considered for obtaining of welded joints of elements of housings neutron measurement channel of being one of the most important elements of the system of in-pipe measurements of nuclear power units. Results of working through of technology of automatic GTA welding and optimum modes of performance of these joints using domestic modernized automatic machines for orbital welding ADTs 627 U3.1 and ADTs 625 U3.1 as well as technical characteristics of indicated automatic machines are given. Procedure of assembly for GTA welding of structural elements of housings of neutron measuring channels was described. Results of non-destructive testing, mechanical testing, metallographic investigations and tests to intercrystalline corrosion resistance of welded joints are submitted. It is shown that application of developed technologies and equipment allows mastering the domestic production of neutron measurement channels. 10 Ref., 3 Tables, 3 Figures.
 
 
Keywords: automatic orbital welding, neutron measurement channels, nuclear reactors, spigot-and-socket joint, non-consumable electrode
 
 
Received:                27.03.13
Published:               28.06.13
 
 
References
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3. Trofimov, N.A., Lappo, V.V. (1979) Measurement of parameters of thermophysical processes in nuclear power engineering. Moscow: Atomizdat.
4. Makhlin, N.M., Korotynsky, A.E., Bogdanovsky, V.A. et al. (2011) Single- and multioperator systems for automatic welding of position butt joints of nuclear power plant piping. The Paton Welding J., 11, 28-36.
5. Bogdanovsky, V.A., Gavva, V.M., Makhlin, N.M. et al. (2011) Application of automatic orbital welding to fabricate absorbing inserts for spent nuclear fuel storage containers. Ibid., 12, 34-37.
6. Ishchenko, Yu.S. (2002) Physical-technological principles of weld formation in arc welding process. In: Welding in nuclear industry: Transact. of NIKIMT. Moscow: IzdAT, Vol. 2, 204-240.
7. Bukarov, V.A. (2002) Technology of automatic shielded arc welding. Ibid., Vol. 1, 149-210.
8. Poloskov, S.I., Bukarov, V.A., Ishchenko, Yu.S. (2000) Influence of parameter deviations of argon-arc position butt welding on quality of welded joints. In: Proc. of All-Russian Sci.-Techn. Conf. (Moscow, Sept. 2000). Moscow: MEI, 22-25.
9. PN AE G-7-016-89: Unified procedure of control of base materials (semi-products) of welded joints and surfacing of equipment and pipelines of nuclear power plant. Visual and measuring control. Moscow: Energoatomizdat.
10. PN AE G-7-019-89: Unified procedure of control of base materials (semi-products) of welded joints and surfacing of equipment and pipelines of nuclear power plant. Control of tightness. Gas and liquid method. Moscow: Energoatomizdat.

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