cthia wrote:If there is a compensator failure, in all likelihood it would happen under battle conditions. Under battle conditions the reactor's output would be at maximum power generation sending huge amounts of power through the system so it would be readily available for use. If power hungry systems are shut down then the reactor's output needs to be dialed back. Bad things happen when huge amounts of excess power is being fed through the grid. If everyone is goo, there's nobody around to coddle the reactor.
Though a reactor isn't exactly a hand stoked steam boiler. The moment to moment control is going to be handled by automated systems; as well as having automated safety systems to attempt to protect against unsafe operating conditions. So unless battle damage disrupts them the reactor's automatic controls should prevent it from running away or providing excess power after demand drops (and ships have huge amounts of capacitors to shunt that excess power into while throttling back reactor output. Though depending on exactly what happens, and how they're programmed to respond, the automated control systems may end up protecting the reactor by performing a safe shutdown of it (especially when they aren't getting human response to alarms).
That said, baring a perfect golden BB that hits it, compensator failures are very, very, rare even when warships are pushed beyond the normal safe operating limit for them.