I wasn't aware that there's unaccounted for coolant loss. I am totally chagrinned and bummed out I am apparently so unequivocally WRONG! When dealing with nuclear reactors, valid conclusions are irrelevent if they aren't actually sound.
THREE unexplainable coolant level drops is alarming. It certainly looks like its Apollo 13 time:
http://www.freerepublic.com/focus/f-news/2688687/posts
Well, if pumping water in isn’t raising the level, then it’s most likely leaking. Or boiling off faster than the rate of fill (if that can even happen), which would mean that it will be dispersed as (somewhat?) radioactive steam.
If the containment is leaking, odds are that the leak is underneath where it can’t be detected easily. Maybe they can pour water in faster than it leaks out and cool the reaction if that is the case. They’ll still have to devise a way to seal it up, perhaps by injecting concrete below the containment structure or into the bottom of it, while maintaining a flow of water adequate to keep things cool.