On the plus side, with 200 people if you just rotate people around regularly you can significantly reduce the radiation exposure of those on the inside of the c

On the plus side, with 200 people if you just rotate people around regularly you can significantly reduce the radiation exposure of those on the inside of the cluster and their total exposure while in space. Their body and water mass surely make for a decent shield. Or again, realistically with humanity being humanity, whatever disadvantaged group emerges in space will end up as the shield layer.