MCBEND computer model

FIG. 19. Section of MCBEND Computer model used to predict the cold and hot gas duct Neutron flux levels... 

The conical shape of the fuel channel pots which allow for ease of refuelling was taken account of in the computer models. The boron shield is a sandwich of 2% boron steel between wide steel plates which, for MCBEND modelling purposes, was homogenised. Also included in this region was the metal foil insulation. 

The MCBEND geometrical model represents a quadrant of the reactor containing a coolant loop ext nal to the steel reactor pressure vessd. Adjacent ducts are accounted for by the use of reflecting boundaries. Figure 19 shows the computer repres itation of the MCB model... 

---