The UO2 fuel is normally enriched with 3-5% of U235. The uranium alloy has been enriched to contain up to 90% U235, but is normally used at between 45-75% U235 enrichment in PWR for ships propulsion.
UO 2一般内含3 - 5%的U235，而铀合金经过浓缩则含有90%的U235，但是船用推进器一般使用U 235含量为45 - 75%的浓缩铀。
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