Fan Casting Feast of the Dead

A zombie movie made in the vein of 'Alien' and 'Aliens': After a power plant is soon breached by an explosion and radiation leak, its cooling towers collapse, releasing the radiation. Soon afterwards, an unusually green comet crashes into the area and that, combined with the radiation, creates a large horde of zombies. Now, a group of survivors must escaped their quarantined city before it's bombed to prevent the infection from spreading.