Original story from Gizmodo Australia Dec 16 2011
Japanese officials are preparing to finally declare the Fukiushima power plant in a state of cold shutdown as early as 9am tomorrow (GMT). Now they can begin the estimated 40-year process of dismantling the site and repopulating the area.
Cold shutdown is when the water used to cool the fuel rods is lowered below the boiling point, which brings the reactor subcritical — meaning the nuclear reaction isn’t self-sustaining. The reactors at Fukushima have actually been in cold shutdown since September but officials have been hesitant to declare the all-clear on account of occasional temperature spikes in the system. And the fact that an official announcement of that shutdown stipulates some 80,000 residents will be allowed back within the 12-mile exclusion zone.