Reactor
AGR (Advanced Gas cooled Reactor). General Presentation of the British Nuclear Fleet

The main components of the AGR reactor system are the core, heat exchangers and blowers, which are housed in a pre-stressed concrete casing with an internal stainless steel liner that also acts as a deflector to optimize cooling of the casing's internal structures. The graphite moderator consists of columns of stacked graphite bricks held together by a system of wedges. These bricks are designed to slow neutrons, form cooling channels and house fuel elements and instrumentation (figure 3 ). Figure 4 shows the lattice pattern: fuel element location,...