Hershal,
If it is the "Nuclem" I am familiar with, I have a 10 or 12 year old tree in the ground here. It bears heavily ever year and the fruit is very good. It is fairly seedy, but not enough seed to be a problem for me.
My start came from a friend in Montezuma, GA (near Macon). The tree at Montezuma has been hardy there for years. If I remember correctly some seedlings I grew some years back bore fruit in 3 to 4 years. Seems like the fruit those seedlings tasted like the parent. I have been told this is a cross between Satsuma and Clementine, but I can't verify that. Given the growing habit and taste, it is certainly possible.