Nuclear fusion represents a promising solution for sustainable and large-scale energy production, with tritium playing a central role as a key fuel. Efficient tritium management, including its breeding, recovery, and recycling, is essential to ensure the viability of a fusion power plant, and is governed by the design and performance of the fuel cycle system. Existing models of the nuclear fusion fuel cycle often rely on simplified assumptions, such as the use of residence time to describe the behaviour of gas retention. While computationally efficient, these models lack a detailed description of the physical processes governing the system and offer limited insight into the operation and limitations of key components.