钋是高放射性的元素，金属。
日本福岛核电站问题的一大部分是那些保存在电站存储池里高放射性的烧过的核燃料棒。
A big part of the problem at Japan's Fukushima Daiichi power station are the highly radioactive spent fuel rods kept in storage pools at the plant.
这块裹尸布在中世纪后期遭到火灾破坏，也可能会增加另外的碳元素，这样会产生高放射性的碳素使计算的年代有所延迟。
The shroud was also damaged by a fire in the late Middle Ages which could have added carbon material, resulting in a higher radiocarbon content and a later calculated age.
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