These radioactive elements are by-products of the fission reaction that generates power in the nuclear plants.
这些放射性元素为核电站裂变发电时的副产品。
Both Xenon 133 and 135, which have been detected, are by-products of nuclear fission. The substances themselves are not considered a health risk.
这次侦测出的133和135型氙气，是核裂变发生的副产品。氙气本身不致危害健康。
The measurement of thermal neutron cross sections of long-lived fission products (LLFPs) also has practical application value in nuclear waste disposal.
对于长寿命裂变产物核素热中子反应截面测量，除了上述意义外，在废物处理处置方面也具有实际应用价值。
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