A point-kinetics model is used to investigate the effect of the amount of auxiliary power and energy of the injected neutral beam on the dynamics of the International Thermonuclear Experimental Reactor (ITER). Four different confinement scalings are tried. A multigroup slowing-down method is followed to consider the finite thermalization time of the fusion fast alpha particles and the injected neutral beam particles. The analysis shows the ability of the reactor to approach a steady-state operation. An auxiliary heating scenario of 20 MW and 1.3 MeV neutral beam allows steady-state operation without violating the beta limit. The analysis also shows the sensitivity of the reactor dynamics to the confinement scaling. In addition, the analysis shows that the reactor power can be increased by increasing the rate of the injected fuel, but varying the energy of the injected fuel does not affect the reactor power.