Metal particles in the radiator coolant.

[major7venth]

Installed new radiator (flushed out prior to install) filled with just water and fllushed out the system a few more times and ran it and let cool and flushed it out a few more times, and I have really small metal particles in the radiator water, some stick to a magnet, little sparklies in the drain pan. Like panning for frigin aluminum.
Assuming it can only be the water pump, Please tell me, has anyone ever experienced a water pump going out like this (destroying itself ) on an SVX?
I have never seen anything like it my whole life of working on cars.
Thanks for the help.
M7