In the 70 years since nuclear energy was developed, name one
explosion of a nuclear power plant?

Chernobyl and Three Mile Island
Neither were nuclear explosions. In fact if you would take the time to
check three Mile Island was a leak.

Well that's true. But the Question was, (see above)
There was a hydrogen explosion at TMI.
There was actually a third incident, but I don't remember the name of it.