乏核燃料
溶解
过氧化氢
放射分析
扩散
体积热力学
稳态(化学)
弹丸
核燃料
化学
放射化学
氢
核工程
材料科学
环境科学
热力学
核化学
水溶液
物理
复合材料
有机化学
物理化学
工程类
作者
Fredrik Nielsen,Karin Lundahl,Mats Jonsson
标识
DOI:10.1016/j.jnucmat.2007.01.279
摘要
A simple mathematical model describing the hydrogen peroxide concentration profile in water surrounding a spent nuclear fuel pellet as a function of time has been developed. The water volume is divided into smaller elements, and the processes that affect hydrogen peroxide concentration are applied to each volume element. The model includes production of H2O2 from α-radiolysis, surface reaction between H2O2 and UO2 and diffusion. Simulations show that the surface concentration of H2O2 increases fairly rapidly and approaches the steady-state concentration. The time to reach steady-state is sufficiently short to be neglected compared to the times of interest when simulating spent fuel dissolution under deep repository conditions. Consequently, the steady-state approach can be used to estimate the rate for radiation-induced spent nuclear fuel dissolution.
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