Uranium dioxide does not react with water at high temperature, a very valuable characteristic as otherwise cladding failures in water cooled reactors would lead to serious reactions.二氧化铀在高温下不与水发生反应,(这是)一 个重要的特性,否则水冷堆的包壳破损将导致严重的反应。 It can retain a large fraction of the gaseous fission products at temperatures below 1000oC, but as the fuel temperature at the center of a pellet is likely to be greatly in excess of this value, provision(iB)must made for fission product gas release.在1000度以下,它可以保持裂变气体产物的一大部分, 但是由于燃料芯块中心的温度可能超过这个温度,必须采取预防 措施防止气体释放。 This is usually done by having an empty space at the top of each fuel tube into which the gases can diffuse.这通常是通过 在燃料棒上部留出一个空间来使气体向其扩散的方式来实现。Uranium dioxide does not react with water at high temperature, a very valuable characteristic as otherwise cladding failures in water cooled reactors would lead to serious reactions. 二氧化铀在高温下不与水发生反应，(这是)一 个重要的特性，否则水冷堆的包壳破损将导致严重的反应。 It can retain a large fraction of the gaseous fission products at temperatures below 1000oC, but as the fuel temperature at the center of a pellet is likely to be greatly in excess of this value, provision (预防) must made for fission product gas release. 在1000度以下，它可以保持裂变气体产物的一大部分， 但是由于燃料芯块中心的温度可能超过这个温度，必须采取预防 措施防止气体释放。 This is usually done by having an empty space at the top of each fuel tube into which the gases can diffuse. 这通常是通过 在燃料棒上部留出一个空间来使气体向其扩散的方式来实现