Temperature and Weight Loss

By using the same ‘form factors,’ the moderator brick mean weight loss can be estimated, assuming that weight loss is proportional to burnup or fluence.

The gas temperature will vary roughly linearly in the axial (vertical) direction from the inlet tempera­ture T to the outlet temperature T2. A more detailed profile may be calculated using a thermohydraulics
code. The radial temperature can be assumed to follow the radial flux profile. Thus, an approximate mean gas temperature for an individual moderator brick may be obtained.