This photograph of Fukushima's reactor 4—just released by the Tokyo Electric Power Company—shows how they are pouring water inside the reactor building.
See that red crane? That holds the hose straight up to the top of the reactor building. Since the outer shell is almost destroyed, it's relatively easy to pour the water in. [Tepco]
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DISCUSSION
It used to be that you could click on a picture to see a larger version of that very same picture. Yep, those were the good days.