Patent Number: 048470082
Section: claims

1. A nuclear containment composition resulting from the solidification of a melt of (1) a lead phosphate glass consisting essentially of, in weight percent, 45-66% PbO, 34-55% P.sub.2 O.sub.5, (2) a radioactive metal oxide mixture incorporated in said glass, and (3) an effective corrosion-inhibiting concentration up to 9% Fe.sub.2 O.sub.3 incorporated in said glass, based on the total weight of said composition. 2. The composition of claim 1 in which the metal oxide mixture content by weight is up to 20% of the lead-phosphate glass. 3. An improved process for the containment of radioactivity comprising: (a) forming a melt, at a temperature in the range of 800.degree. C. to 1,500.degree. C., of a lead glass composition consisting essentially of 45-66% PbO, 34-55% P.sub.2 O.sub.5 or a compound readily decomposable to P.sub.2 O.sub.5 and an effective corrosion - inhibiting concentration of up to 9% Fe.sub.2 O.sub.3 ; and  (b) incorporating up to 20%, based on the weight of the glass composition of a radioactive metal oxide mixture and then solidifying the melt.