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"Soviet nuclear train art" by (?) Dmitry Choibolsan / Дмитрий Чойболсан
(neverwasmag.com)
Source: Soviet Superscience – Never Was
RSS Feed: https://neverwasmag.com/feed/
EDIT: From @Zeus@lemm.ee's comment:
[the source] says "for the magazine 'populjarnaja mechanika'", and credits dmitri choybolsan (Дмитрий Чойболсан). it's not on the linked portfolio page, but it kind of matches his style(-ish) and it was used for the cover of 2008/№ 11:\
see cover of 2008/№ 11
Original post:
I found one version of the image with "© Art. Lebedev Studio", but Wikipedia says:
Art. Lebedev Studio is a design firm in Russia, founded in 1995 by Artemy Lebedev.
~~So I don't think they are the original source, unless this is a modern retro-futuristic design.~~
It is not always possible (or worthwhile) to be sure about the sources. IMHO the best way is to just add all the info you find so that others can investigate further if they want to.