Detta beskriver väl dagssituationen rätt bra:
For now, workers must keep pumping water into the reactor vessel and spent fuel pools to prevent overheating and a further meltdown while they try to rebuild the cooling system.
There are no easy choices, though.
"They are trapped in a situation where they have to feed and bleed the water in the reactor," Arnie Gundersen, a 29-year veteran of the nuclear industry who worked on reactors similar to those at Daiichi and who is now chief engineer at Fairewinds Associates Inc of Burlington, Vermont.
Until the cooling systems are working normally workers have to allow the steam to escape to stop the pressure from getting dangerously high, even though that steam is radioactive. But as the steam comes out they have to pour more water in.
Some radioactive water is also escaping from the reactors and storage pools, possibly because of damage from the earthquake or explosions in the early stages of the crisis. It is getting into unexpected places inside and outside the plant, making it unsafe for workers to navigate the buildings to make needed repairs.
"There's definitely a conflict now between trying to keep the reactors cool and managing the contaminated waste water being generated by the operation," said Ed Lyman, a senior scientist with the Union of Concerned Scientists, a U.S.-based nuclear watchdog group.
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http://us.mobile.reuters.com/article/idUSTRE72U04N20110331?ca=rdtr