LWR燃料包壳锆合金吸氢的连续介质模型
Continuum model for hydrogen pickup in Zirconium alloys of LWR fuel cladding
摘要：
本文建立了一个连续介质模型，用于计算各种锆合金在水蒸气和加压水氧化条件下随时间变化的氢吸收率。仅使用一个拟合参数，在氧化物表面的有效氢气分压，得到的预测和先前测量的氢拾取分数之间的定性协议。因此，计算结果表明，通过致密的氧化物层的H扩散起着重要的作用，在氢拾取过程。最后讨论了该模型的局限性和可能的改进。
英文摘要：
A continuum model for calculating the time-dependent hydrogen pickup fractions in various Zirconium alloys under steam and pressured water oxidation has been developed in this study. Using only one fitting parameter, the effective hydrogen gas partial pressure at the oxide surface, a qualitative agreement is obtained between the predicted and previously measured hydrogen pickup fractions. The calculation results therefore demonstrate that H diffusion through the dense oxide layer plays an important role in the hydrogen pickup process. The limitations and possible improvement of the model are also discussed.
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