It was more that the RMBK was more designed around existing Soviet manufacturing capacity, they could and did build more conventional reactor designs as well but they required enormous pressure vessels the USSR only had one factory to produce. The RBMK on the other hand is not a monolithic pressure vessel, it's a collection of hundreds of individual pressurised tubes which were much easier for the Soviet manufacturing base to produce. It was actually a clever idea on the face of it, the problem was more it had inherently dangerous behaviour in certain regimes (the infamous positive void coefficient of reactivity) and the positive scram effect wasn't known until well into their deployment. The operators were also given contradictory operating instructions which failed to highlight the safety-critical nature of certain parameters.
One famous example is Jacek Karpiński [0]. Soviet pressure, opposition to the use of Western parts, and intense jealousy of the commie state bureaucracy which sought to hold a monopoly over computer production (e.g., through the state-owned companies Odra and Elwro) halted production.
Here's some English language documentation for one of his models (the K-202) which was exported to the UK [1]. (The state-produced Mera 400, a heavily modified version of the K-202, did achieve a great deal of success, however, despite high production costs.)
There was an article posted here about him about 10 years ago [2].
[0] https://en.wikipedia.org/wiki/Jacek_Karpi%C5%84ski
[1] https://web.archive.org/web/20241012182627/https://www.zenke...
It's worth noting that Poland was actually one of the least ideologically rigid countries in the Eastern Bloc. While you couldn't openly oppose the regime, it was entirely possible to have a brilliant career in science or medicine (like Zbigniew Religa, who pioneered Poland's heart transplantation program) without strictly toeing the Party line.
Yet even in Poland's relatively relaxed climate, Karpiński’s revolutionary K-202 was strangled by bureaucratic jealousy, state monopolies (Elwro), and the paranoia of central planners.
If that was the fate of an innovator in Poland, imagine how much worse it was inside the borders of the USSR proper. The Soviet system operated on a near-literal interpretation of totalitarian control, where maintaining absolute party monopoly over every facet of life was prioritized above efficiency, wealth, or technological progress.
In that environment, independent thinkers weren't just seen as eccentric or inconvenient—they were viewed as a systemic security threat. When a system treats structural innovation as a form of ideological deviance, the safest thing for a genius to do was to keep quiet, escape to the West, or risk ending up neutralized by the state. You can't build an "alien spaceship" computing paradigm when the system's primary metric of success is total bureaucratic obedience.
I really wanted an MSX looking box though, that we played Karateka on in some precursors of Internet cafes, they looked the business, like high end Japanese hifi gear of the era.