Broken radiator on S1

Does anyone have the scoop on the broken radiator on S1 ? I saw glimpses
of it during a short stint of watching the EVA.

Is it just some protective cover that is ripped, but the ammonia tubing
inside is still OK ? Has ammonia leaked ?

Is the whole unit inoperative because of this, or are they still using
it to cool the station ? (can they isolate individual "tiles" in the
array ?)


Whn did the rip happen ? When it was installed ? or sometimes more
recently ?