2016-4(21)

Design, manufacturing and commissioning of nuclear industry equipment

Article NameOperational Reliability Increase of Welded Connections of Steam Generators for PWR Reactor Installations
AuthorsN.N. Podrezov*(1), S.A. Tomilin *(2), V.V. Shishov**(3)
Address

* Volgodonsk Engineering Technical Institute the branch of National Research Nuclear University «MEPhI»,
73/94 Lenin St., Volgodonsk, Rostov region, Russia 347360

(1) e-mail: p1n2f@rambler.ru ; (2) e-mail: SATomilin@mephi.ru
** Atommash the branch of JSC AEM-technology in Volgodonsk,
Zhukovskoye shosse, 10, Volgodonsk, Rostov region, Russia 347360

(3) e-mail: shishov_vv@atommash.ru

AbstractA number of the problem seams reducing operational reliability of product exists in a design of PGV-1000 and PGV-1000M steam generators for pressurized water reactor installations. The special attention is required by ring seams № 111-1 and № 111-2 of welding of cold and hot collectors to Du 1200 branch pipe. These collectors work in the conditions of progressing stress corrosion that sometimes leads to loss of their constructional durability in 5 – 25 years after start-up of reactor installations. In work the technology of welding of the specified seams at the Atommash the branch of JSC AEM-technology in Volgodonsk is considered. Production measures which realization is directed to increase in a technological welding of the considered seams for the purpose of level reduction of residual welding tension in the critical zone are proposed. A critical zone is considered to be transition zone from collector "pocket" to Du 1200 branch pipe according to Technique of assessment of service life of the heat carrier welding collector knot to the PGV-1000 steam generator case.
Keywordssteam generator, welding connection, welded seam defects, residual welding tension, operational reliability
LanguageRussian
References

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[2] Getman A.F., Usanov A.I., Lukasevich B.I., Tutnov A.A., Pasmanik L.A., Smirnov V.A., Kamyshev A.V. Prichiny povrezhdeniy svarnykh shvov №111 PGV-1000 i predlozheniya po ikh ustraneniyu [Damage reasons of welded seams № 111 PGV-1000 and offer on their elimination]. Available at: http://www.gidropress.podolsk.ru/files/proceedings/seminar8/documents/sgpg2010-017.pdf (in Russian)

[3] Doronin Yu.V., Podrezov N.N. Neobkhodimost formalizatsii ponyatiya svarivaemosti v proizvodstve izdeliy AES [Need of formalization of welding concept for manufacturing of the NPP products]. Globalnaya yadernaya bezopasnost [Global nuclear safety], 2014, №3(12), ISSN 2305-4141Х, pp. 26–30. (in Russian)

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