Add to the potential for reactor 1 core explosion the Reactor 4 fuel pool crisis.

Fukushima Daiichi’s Reactor 4 fuel pool was damaged after an explosion several weeks ago (many main stream media report only two explosions, but there were three; reactors 1, 3 & 4 buildings). The problem is that it is now apparent that Reactor 4 fuel pool is leaking water faster than they can pour in (maybe this is the source of the leaks into the ocean?).

If spent fuel rods are exposed too long they will break down and spew radiation.

Japanese media now saying that the main reason for United States interest in the nuclear crisis is because the U.S. is in the path of most radiation contamination.  The U.S. is going to start using an UAV (unmanned aerial vehicle) to monitor airborne radiation levels above Fukushima Daiichi, especially Reactor 4 fuel pool.

There are more than 10,000 spent fuel rods at Fukushima Daiichi, according to Hosono Goshi, a special adviser to Japanese Prime Minister Kan Naoto.