Computational codes are necessary tools for geochemical modeling of the alteration of minerals due to their ability to handle key mechanisms, such as dissolution, precipitation, diffusion, and convection at many temporal and spatial resolutions. Modeling glass corrosion specifically requires a description of the amorphous layer that forms on the surface of the glass and its effect on glass alteration kinetics. The objective of the GRAAL model (glass reactivity in allowance of the alteration layer) is both to provide a simple implementation of the passivation process in a reactive transport code and to provide data relative to the composition and the solubility of the amorphous layer. The size and properties of the protective amorphous layer drives the glass alteration rate, with regard to passivation; the greater the quantity of the protective amorphous layer, the lower the dissolution rate of the primary mineral. Here, concepts, equations, and implementation of GRAAL are reported. Simple glass alteration experiments are used to apply the model and measure parameters. The International Simple Glass used for nuclear glass long-term behavior studies is at the center of the glass compositions studied.

计算代码是矿物变化的地球化学建模的必要工具，因为它们具有在许多时空分辨率下处理关键机制（例如溶解，沉淀，扩散和对流）的能力。对玻璃腐蚀进行建模特别需要描述在玻璃表面上形成的非晶层及其对玻璃蚀变动力学的影响。GRAAL模型的目的（在改变层允许的情况下玻璃反应性）既要以反应性传输代码提供钝化过程的简单实现，又要提供有关非晶层的组成和溶解度的数据。就钝化而言，保护性非晶层的尺寸和性质决定了玻璃的蚀变速率。保护性无定形层的数量越多，主要矿物质的溶解速率越低。在此，报告了GRAAL的概念，方程式和实现。简单的玻璃蚀变实验用于应用模型和测量参数。用于核玻璃长期行为研究的国际简单玻璃是所研究玻璃成分的中心。