Quoteing this again, because if you think real hard about it, it does make sense.
There are 2 big confusing things about the situation that sorta point to something fishy goin on over there. The first one is that for some reason, even though there wasn't any fuel in the reactor it still needed to be sprayed with water. Why? Could they have been possibly using the fuel that was in there to make weapons?
The second thing is, they have been using barges there under the cover of darkness that are protected by another ship. Why would they first the protector ship, then the darkness to move things around?
There is a third fishy thing I just remembered... there's this light that can be seen dimly on the nighttime web cam for the plant... They'd need light to move whatever it is their moving over there.
A fourth just occurred to me lol... just recently they upgraded it to a level 7 accident after being at 5 for so long. At level 5 it is still local and Tepco has control over it. At level 7 it becomes international so other countries can butt in, and if it was level 7 before now the other countries would have found out about whatever they were using reactor #4 for. They must have gotten everything out. If you are wondering where they move the stuff to with the barges... there is a very deep trench a bit to the east of Japan. Drop it down there and no-one's the wiser.
It sounds crazy, but it does kinda make sense.