Brank
Shortly before the payload hits its target, the MAKs shields reengage, stopping most of the payload. Some explosives however, manage to get through beforehand, damaging the reactor. Though Kel'Shir engineers are working on repairing the damage, it will take them time to do so and thus the MAK wont be able to fire for a while.
(If you think this is too BS i can edit the post)