They're currently testing a new cooling system for it. It uses six fans, the same kind of fans that you'd use to cool off your computer. And not the cheap ones either-- we're talking some pretty decently expensive, high-CFM fans here.
The reason for the new cooling system is that the original design apparently got the fans too close to the magnetic field, and the current induced in the fans by the magnetic field overwhelmed the motor windings, and burned them up.
At maximum continuous operation, the beast needs to dissipate 3000 watts of heat. That's the equivalent of leaving your oven on full blast with the door open.