Tritium release from Zircaloy-2: Dependence on temperature, surface conditions and composition of surrounding medium
Tritium release from Zircaloy-2: Dependence on temperature, surface conditions and composition of surrounding medium
复制标题
Zircloy-2 中氚的释放：取决于温度、表面条件和周围介质的成分
DOI：
10.1016/0022-3115(85)90026-1
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发表时间：
1985
影响因子：
3.1
通讯作者：
U. Kunz
中科院分区：
文献类型：
--
作者：
W. Kunz;H. Münzel;U. Kunz
在 200 至 600°C 的温度范围内研究了使用反应性和惰性载气的氚化和部分氧化的锆合金样品的氚释放。对于覆盖有 ≲ 0.1 μm 厚氧化层的商用轧制箔，在研究的温度区间内释放速率增加了 5 个数量级。释放的氚在低温下优先以 HTO 形式出现，即使载气中仅存在几个 ppm 的氧气。此外，还研究了氧化层厚度对释放速率的影响。在较低温度下，释放速率与层的厚度相关。然而，由于氧扩散的影响，在500℃时这一现象并不十分明显。
Tritium release of tritiated and partially oxidized Zircaloy samples using reactive and inert carrier gases was studied in a temperature range from 200 up to 600°C. For commercial rolled foils, covered by a ≲ 0.1 μm thick oxide layer, the release rates increased by 5 orders of magnitude in the investigated temperature interval. Released tritium appears at low temperatures preferentially as HTO, even if there are only a few ppm oxygen present in the carrier gas. Furthermore, the effect of the thickness of the oxide layer on the release rates was studied. At lower temperatures the release rates are correlated with the thickness of the layer. However, this was not very evident at 500°C due to the influence of oxygen diffusion.