> what makes it acceptable for a prison, but not "livable" is that

Much simpler. The main concerns are digging (radioactive fallout is about 30cm deep into the ground at this point) and unmapped hot spots. Basically, there could be a patch of the land with radioactivity high enough that it has to be either deactivated or tagged out.

> government is interested

One of the cultural gaps between us, russian [1] people and western world is the vast depth is misunderstanding of the function of government. Our governments is only interested in personal enrichment and the well being of people is never a factor. Literally.

[1] as in "slavic people", not "citizens of russian federation".