make fusion much more stronger because irl fission is weaker than fusion and in game plutonium creates 9000k degrees when working while hydrogen fusion creates 500 degrees exculding self sustained that does even less
IRL, a fission reaction is far more energetic than a fusion one. The most energetic fusion reaction is the one between deuterium and tritium, which releases around 18 MeV of energy. Nuclear fission on the other hand averages around 200 MeV of energy.
no fusion creates much more heat than 1000celsius