Fusion power plants are certainly not the only thing we have that makes neutrons. You can buy neutron sources suitable for irradiating fissile material without

Fusion power plants are certainly not the only thing we have that makes neutrons. You can buy neutron sources suitable for irradiating fissile material without having to build a fusion power plant. Fusion power plants would also be a terrible place to irradiate uranium. Getting material in and out would be a total hassle and you wouldn't necessarily be able to control the reaction.