What method is required for dissipating waste heat from massive reactor cores in space?

Relying solely on radiation via enormous radiator arrays

In the vacuum of space, heat transfer mechanisms available on a terrestrial body, such as conduction and convection, are severely limited or unavailable across external surfaces. For structures operating in orbit, the primary method for shedding waste heat—especially massive amounts generated by powerful reactors and life support systems—is thermal radiation. To manage the colossal thermal output of a weapon system capable of planet destruction, the station would necessitate enormous radiator arrays integrated into its structure. These arrays must be large enough to radiate the waste energy away effectively; otherwise, the internal components, including the reactor and crew areas, would rapidly overheat, leading to catastrophic failure.