Turns out clientism is still bad even when it's the PEOPLE'S clientism
20th Century History
(media.piefed.social)
Cheaply built? No. But it did have a known design flaw that wouldn't be fixed in RBMK reactors until after the disaster. The control rods contained graphite tips to moderate reaction rates when the rods were fully removed. Because they're the first thing to enter the reactor during a scram (emergency shutdown), they temporarily increase the rate of reaction. This was discovered in 1983 but never fixed because "apparently there was a widespread view that the conditions under which the positive scram effect would be important would never occur".