That's not exactly true. There's enough neutron flux in a hypothetical fusion reactor (assuming D-T) for neutron activation of structural materials to be a rea

That's not exactly true. There's enough neutron flux in a hypothetical fusion reactor (assuming D-T) for neutron activation of structural materials to be a real concern. There are actually some hybrid fission-fusion designs which use a fusion reactor running at a loss as a neutron source for a subcritical assembly of fission fuel. You're right that the fission products and high-mass-number alpha emitters have left the picture, though.