MOXGD assembly configuration. Cell types:1 - Central tube cell; 2 - Fuel cell (with PU3, 4.2 wt.% Pu); 3 - Guide tube cell; 4 - Fuel cell (with PU2, 3.0 wt.% Pu); 5 - Fuel cell (with PU1, 2.0 wt.% Pu); 6 - Fuel cell (with GD1, 3.6 wt.% LEU with 4.0 wt.% Gd2O3).