translation.en: Everybody was really excited about Curiosity, and that had this big plutonium battery on board that has plutonium-238, than the low-enriched uranium fuel of these molten salt reactors, which means that the effects would be negligible, because you launch it cold, and when it gets into space is where you actually activate this reactor.
translation.zh: 大家都对”好奇号“火星探测器感到很兴奋， 那个探测器上就有一个很大的钚电池， 用的是钚238， 它其实比这些熔盐反应堆里的低浓度铀燃料 具有更高的比活度， 这就意味那些影响几乎可以忽略不计， 因为我们是在它还未启动的时候就发射出去了， 当到达太空后，我们才真正激活这些反应堆。