For one, the whole story about silencing the reactor flaw in secret libraries by KGB was made up, AFAIK.
An article by two engineers critical of RMBK's design had been published long before. In 'Kommunist' no less (the Central Committee's journal).
Source: Adam Curtis documentary 'A is for Atom' (1992)
KGB censorship is not needed, societies rarely listen to what alarmists/cassandras have to say anyway.
Chernobyl is a major human error incident in some way similar to Fukusima.