Quote from MaklodaSux:
He's not he's a dipshit.
From what I've heard. Right now they are trying to maintain core cooling using the onsite de-mineralized water. If for some reason they cannot maintain cooling using the internal loop most plants have emergency cooling connections to an alternate source (the river/bay) in which they are connected. These stations are usually outfitted with a Standby Liquid Control system which inject Sodium Pentaborate (a neutron absorber) to poison the core killing all reactions. Either of the two options mentioned would essentially permanently shut down the plant as the contamination on the Nuclear Steam System would be irreparable. These are the next options and will be used as a last resort and will stop the reaction and maintain cooling.
This reactor is not coming back anytime soon. Seawater and boric acid being pumped straight into containment area.
http://www3.nhk.or.jp/daily/english/13_01.html