Patent Number: 054003750
Section: claims

1. A transuranium element-transmuting fuel assembly, said fuel assembly comprising a wrapper tube and a plurality of fuel pins enclosed within said wrapper tube, said plurality of fuel pins comprising transuranium fuel pins charged with a transuranium element fuel material and an uranium-plutonium mixed fuel material, and non-transuranium fuel pins charged with at least one member selected from the group consisting of enriched uranium fuel material, uranium-plutonium mixed fuel material and mixtures thereof, the amount of transuranium elements being controlled so as to prevent melting of said fuel assembly, wherein the amounts of .sup.242 Cm, .sup.244 Cm and .sup.241 Am in said fuel assembly satisfy the equation EQU 1.2.times.10.sup.2 .times.M.sub.242 +2.8.times.M.sub.244 +1.1.times.10.sup.-1 .times.M.sub.241 &lt;Q.sub.1 2. The fuel assembly of claim 1, wherein said transuranium fuel material comprises Sr or alkaline metal radioactive fission products.