The long-term evolution of cemented waste packages is governed by (bio)chemical reactions between waste, cement, and barrier materials, and by transport processes inside the waste package and through openings in the waste package hull. Inside a waste package, gases can be generated by pH-dependent anoxic corrosion of metals and the degradation of organic matter. The (bio)chemical reactions consume water and will not proceed under dry conditions. The degradation of cementitious materials lowers the alkaline pH of the pore water. The modeling of such a complex feedback system shows that the internal structure of a waste package and the exchange of mass with the environment (boundary conditions) are major factors that determine the importance of process couplings. The (bio)chemical reactions are controlled by internal re-distribution of water predominantly via vapor transport. Calculated gas generation rates were found to be affected by dry-out processes inside the drum.

胶结废物包装的长期演变取决于废物，水泥和阻隔材料之间的（生物）化学反应，以及废物包装内部的运输过程以及废物包装船体的开口。在废物包装内，金属的pH依赖性缺氧腐蚀和有机物的降解会产生气体。（生物）化学反应会消耗水，在干燥条件下不会进行。胶凝材料的降解降低了孔隙水的碱性pH。这种复杂的反馈系统的建模表明，废物包装的内部结构以及与环境（边界条件）的质量交换是决定过程耦合重要性的主要因素。（生物）化学反应主要通过蒸气传输通过内部的水再分布来控制。发现计算出的气体产生速率受转鼓内部干燥过程的影响。