As long as an aether reactor is properly designed, I can't imagine that rigging it to explode would be an easy task. After all, you'd need to do it in such a way that it maintains the tap rather than simply disconnecting from the great white flow, and even then, do it in such a way that it blew up when and where you wanted.
While I can imagine purposeful overloads as a self-destruct, it largely depends on how much capacity the reactor is able to produce before the tap is disconnected. While the explosion would never be small, there's a big difference in the 'voltage', so to speak, of a capital ship's reactor and the one in an electric car.