You still don't understand. How does been burned work?
Heat is represented by how fast molecules are vibrating and moving. When a hot molecule (fast moving molecule) interacts with a slower molecule, it imparts momentum (collision) so that the slower molecule speeds up (becomes hotter). In reality, there is not such thing as hot since hot is basically a measure of how fast molecules are moving. Getting hit with something that is moving much faster than you will cause damage. But getting hit with something small that is moving the same speed as you or somewhat slower will not cause damage.
In conclusion, in order for Zoom to be burned, his molecules must vibrate faster than normal. But how can that happen when the radiation that's hitting him is moving and oscillating with speeds far less than his own molecules are moving. The heat from the blast might very well freeze him. Radiation poison cannot occur if one is not affected by the radiation (their molecules don't speed up significantly).
I'll help you out though. Zoom's powers are weird as phuck and may very well go against science more than any character in existence.
In reality, Zoom is suppose to be hot as phuck (hotter than the hottest stars), melting anything he touches. This is because his atoms and molecules are moving far faster than anything in the universe. The atmosphere should begin to freeze the shit out of him or him heat up the shit out of it.
So let's not discuss the physics of his powers. Let's just focus on stuff that is within the suspension of disbelief. Surely you agree that if an object can move faster than a bullet and has more mass than a bullet then it will hit harder than impart more kinetic energy to the target than a bullet would right?
If the board rules essentially mean they fight more realistically than in the comics, then Flash and Zoom both beat Superman 100/10. End of discussion. It's not even that interesting.
The more interesting discussion is how it would go in the comics. Superman should win that.