Due to deep burn-up, the spent fuel of nuclear power reactors has not only complex composition, but also high-level radioactivity.
动力堆乏燃料由于其燃耗深，所以成分复杂，放射性强，从而给其后处理分析带来极大的困难。
2
M5 alloy was a new zirconium alloy used in highburnup assembly such as fuel cladding, end plug, guide tube and grid spring and so on.
M 5合金是一种适用于高燃耗组件的新型锆合金，主要用作燃料棒包壳、端塞、导向管和定位格架材料。
3
Processing of spent fuel with highburn-up should take special measure in order to avoid heavy radiolytic degradation of the solvent and the criticality of plutonium.