A simple poloidal divertor able to enrich and exhaust helium ash has been proposed for an INTOR-size reactor. Monte-Carlo simulations are carried out to investigate the motion of DT-fuel and He-ash particles after they have been re-injected from the divertor neutralizer plate. Helium-ash exhaust is shown to be feasible with a modest pumping speed of about 5 × 105 litre s−1 for most of the conceivable conditions of plasma particle containment.