I've fixed it with this code, in AngelBob Nuclear/prototypes/more-override.lua:6
if settings.startup["MCP_enable_centrifuges"].value == true then
table.insert(data.raw["technology"]["centrifuging-2"].effects, {type = "unlock-recipe", recipe = "clowns-centrifuging-65%"})
table.insert(data.raw["technology"]["centrifuging-2"].effects, {type = "unlock-recipe", recipe = "clowns-centrifuging-70%"})
table.insert(data.raw["technology"]["centrifuging-2"].effects, {type = "unlock-recipe", recipe = "clowns-centrifuging-75%"})
table.insert(data.raw["technology"]["centrifuging-2"].effects, {type = "unlock-recipe", recipe = "clowns-centrifuging-80%"})
table.insert(data.raw["technology"]["centrifuging-1"].effects, {type = "unlock-recipe", recipe = "depleted-uranium-reprocessing"})
table.insert(data.raw["technology"]["centrifuging-1"].effects, {type = "unlock-recipe", recipe = "clowns-centrifuging-45%"})
table.insert(data.raw["technology"]["centrifuging-1"].effects, {type = "unlock-recipe", recipe = "clowns-centrifuging-55%"})
else
table.insert(data.raw["technology"]["nuclear-power"].effects, {type = "unlock-recipe", recipe = "clowns-centrifuging-65%"})
table.insert(data.raw["technology"]["nuclear-power"].effects, {type = "unlock-recipe", recipe = "clowns-centrifuging-70%"})
table.insert(data.raw["technology"]["nuclear-power"].effects, {type = "unlock-recipe", recipe = "clowns-centrifuging-75%"})
table.insert(data.raw["technology"]["nuclear-power"].effects, {type = "unlock-recipe", recipe = "clowns-centrifuging-80%"})
table.insert(data.raw["technology"]["nuclear-power"].effects, {type = "unlock-recipe", recipe = "depleted-uranium-reprocessing"})
table.insert(data.raw["technology"]["nuclear-power"].effects, {type = "unlock-recipe", recipe = "clowns-centrifuging-45%"})
table.insert(data.raw["technology"]["nuclear-power"].effects, {type = "unlock-recipe", recipe = "clowns-centrifuging-55%"})
end