upper two 3) Write out the detailed form of the mult-group diffusion equation for a 4-group model in which there is direct coupling and the fission Source exists only in the groups. . 4) The Table below lists the 2-group constants characterizing a Rwr. Calculate the multiplication factor of the PWR core of height 370 cm and diameter 340cm using the 2-group diffusion theory. Group Two-Group Constant 1 of 2 2 of 2 If wtwo w 0.008476 0.003326 0.01207 1.2627 0.02619 0.18514 0.07537 0.1210 0.3543 0.1210 upper two 3) Write out the detailed form of the mult-group diffusion equation for a 4-group model in which there is direct coupling and the fission Source exists only in the groups. . 4) The Table below lists the 2-group constants characterizing a Rwr. Calculate the multiplication factor of the PWR core of height 370 cm and diameter 340cm using the 2-group diffusion theory. Group Two-Group Constant 1 of 2 2 of 2 If wtwo w 0.008476 0.003326 0.01207 1.2627 0.02619 0.18514 0.07537 0.1210 0.3543 0.1210