[Wonder Warthog]

"Electromagnetic repulsion is the reason why the fragments have the velocity in the first place. They are moving away from each other."

Sorry, but this simply isn't true. The energy comes from the mass difference due to the fission of the isotope, nothing else. There is no guarantee, even, that the two particles have the same sign of charge, depending on which one gets more or less of the original fissioned atom's electrons.

Look dude, my PhD minor subject area was Nuclear Science, this is kindergarten type nuclear knowledge.

[Moonman62]

There is no guarantee, even, that the two particles have the same sign of charge, depending on which one gets more or less of the original fissioned atom's electrons.

The electrons play no significant role in nuclear (hence the term nuclear) fission. It is the splitting of the nucleus that matters, and all the resulting fragments are going to have positive charge.

[WildTurkey]

There is no guarantee, even, that the two particles have the same sign of charge, depending on which one gets more or less of the original fissioned atom's electrons. Look dude, my PhD minor subject area was Nuclear Science, this is kindergarten type nuclear knowledge.

Actually we can pretty well guess that both have the same sign and both are positive.