What I am suggesting is that for the 5 reactor types there is a different type of effect when a reactor goes critical or a ship self distruct happens.
for example:
Fission: Explosion but hot core is left behind on the battlefield, core acts as a hazard, ship flying near it takes damage, ship flying into it takes a lot of damage.
Fusion: explosion as normal.
Antimatter: larger explosion, armor is removed if unshielded inside blast radius.
Quantum: Shields removed in blast radius.
Black Hole: Temporary black hole, ships instant killed, smaller radius