I trust that the loss of coolant isn't an issue in itself?
Any nuclear savvy persons out there that could shed some light on this?
If it isn't radioactive, it's probably the secondary loop, which is used to cool and condense the primary loop after it exits the turbines. Fermi #2 is a Boiling Water Reactor; Pressurized Water Reactors often have three or more loops, but the turbine loop is generally non-radioactive, which has definite benefits.