The truth is no more welcomed by the US government now than it was by the Soviet government after Chernobyl. From Jacob G. Hornberger at fff.org:
SPOILER ALERT: If you have not yet seen the excellent HBO miniseries Chernobyl and might yet do so, you might want to wait to read this article until after you have seen the series, as it contains spoilers.
The five-part series documents the catastrophic nuclear explosion that took place at a nuclear power plant in the Soviet Union in the 1980s, an event that threatened the lives and health of millions of people, not only in the Soviet Union but also in Europe. The series documents the heroic life-endangering efforts of thousands of people in an effort to resolve the crisis with the least amount of damage and loss of life.
The most powerful part of the series occurs in part 5.
Whenever power plant officials conducted tests on the system, everyone knew that there was a failsafe button in the event that everything went wrong with the test and an explosion became imminent. All that the power plant people had to do was push the failsafe button and the entire plant would come to a halt. The reason was that the button activated the introduction of control rods containing boron into the fissioning uranium, which would cause the entire system to be immediately shut down.
To save money, Soviet officials had used graphite in the rods. In the 1970s, a Soviet nuclear scientist wrote an article stating that the graphite would serve as an accelerator, not a suppressant, of an impending nuclear explosion. He wrote that it was imperative that all the control rods be replaced immediately.