You get a rather large explosion.
it would burn
No nuclear energy, no nuclear weapons
No volcanoes in Texas.
they already are
The world would explode
all the fish would die
you will get berned and die
split
it can stop the tornado
No physical or chemical process can alter the radioactivity of the waste, so it will still be there whatever you do with it. If the volcano is active, when the next lava flow occurs the nuclear waste will be ejected with the volcanic matter, so it would be a very bad idea. The idea for long term waste disposal is to find somewhere very geologically stable where it will stay for thousands of years without any risk of returning to the earth's surface, just the opposite of the volcano's contents.
nothing would happen, the sun is constantly going through nuclear reactions
it will blow up