As I &#x2F;really&#x2F; don&#x27;t want to search those terms in order to confirm it... I&#x27;m just going to point out that it seems like meatysnapper is saying:<p>Alfa sub hulls were done (, welded using,) plutonium (welding) rods; according to their memory.  Not, as another reply speculates, made out of plutonium rods (which sounds silly from all sorts of perspectives).