1) During a radiation leaks all radioactive compounds gain a radiation token
but in a solo game the only radioactive compound is the Radium Oxyde (3x) and since you randomly draw 6 cards on the 12 starting compounds you can end up with no radioactive compound in your research field.
I'm sure I missed something
2) When you resolve the chemical reaction on the saboteur card you first check the effect on the saboteur card otherwise you resolve as normal.
Does that means that if you resolve the Plumbane compound card you can return all the elements on the Geiger back in the bag?