Patent Number: 060463740
Section: claims

1. A cellular cement grout for forming a radiation barrier around a radioactive component, said grout comprising in mixture: a cement slurry;  a finished foam material;  a gel-forming material; and  a radiation-absorbing metal constituent.  a cement slurry;  a finished foam material;  a bentonite gel material; and  a radiation-absorbing metal constituent.  a container which encloses said radioactive component; and  a cellular cement grout which forms a radiation barrier in said container around said radioactive component, said grout comprising in mixture: 2. The grout of claim 1, wherein said gel-forming material comprises a bentonite gel material. 3. The grout of claim 1, wherein said radiation-absorbing metal constituent comprises an iron-containing material. 4. The grout of claim 1, wherein said radiation-absorbing metal constituent comprises a barium-containing material. 5. The grout of claim 1, wherein said radiation-absorbing metal constituent comprises a rounded metal shot material. 6. The grout of claim 5, wherein said rounded metal shot material comprises rounded steel shot material. 7. The grout of claim 6, wherein said rounded steel shot material comprises steel shot in the size of approximately size 2 to size 4 bird shot. 8. A cellular cement grout for forming a radiation barrier around a radioactive component, said grout comprising in mixture: 9. A radiation barrier for a radioactive component, said barrier comprising: 10. The barrier of claim 9, wherein said gel-forming material comprises a bentonite gel material. 11. The barrier of claim 9, wherein said radiation-absorbing metal constituent comprises an iron-containing material. 12. The barrier of claim 9, wherein said radiation-absorbing metal constituent comprises a barium-containing material. 13. The barrier of claim 9, wherein said radiation-absorbing metal constituent comprises a rounded metal shot material. 14. The barrier of claim 13, wherein said rounded metal shot material comprises rounded steel shot material. 15. The barrier of claim 14, wherein said rounded steel shot material comprises steel shot in the size of approximately size 2 to size 4 bird shot.