Second , there appears to be ample uranium at reasonable cost to sustain the tripling in global nuclear power generation that we envisage with a once - through fuel cycle for the entire lifetime of the nuclear fleet ( about 40 to 50 years for each plant ) 其次,地球上似乎還有充份的鈾,能以合理的價格去維持未來全球核能電廠的營運這里所設(shè)想的情況是,這些電廠數(shù)目在未來將增加兩倍,而且在其整個壽命(每個電廠約40 ~ 50年)中都是使用單次燃料循環(huán)。