There was a rather decent book written about Chernobyl that came out not too long after the accident. It is a docudrama style novel because, at the time it was written, there were many details not known due to the paranoid secrecy of the USSR. Since then, quite a bit of factual stuff has come to life and
a trip to wikipedia is worth a look.
But, that said, the novel is very well written and gives a lot of human dimension to the accident...the mistakes made, the heroes, the effects of intense radiation and the aftermath. The book is available
here. It's quite good and I have read it at least twice.
There is something to be said for people who, knowing that they will be condemned to a very early and very painful death, stood up and did very valiant things so that others could survive, so that a larger tragedy could be averted.