Peter Anthony Colombo

US Patent:

57323640, Mar 24, 1998

Filed:

Jan 9, 1997

Appl. No.:

8/781003

Inventors:

Paul D. Kalb - Wading River NY
Peter Colombo - Patchogue NY

Assignee:

Associated Universities, Inc. - Washington DC

International Classification:

G21F 900

US Classification:

588 8

Abstract:

The present invention provides a composition and process for disposal of radioactive, hazardous and mixed wastes. The present invention preferably includes a process for multibarrier encapsulation of radioactive, hazardous and mixed wastes by combining substantially simultaneously dry waste powder, a non-biodegradable thermoplastic polymer and an anhydrous additive in an extruder to form a homogenous molten matrix. The molten matrix may be directed in a "clean" polyethylene liner, allowed to cool, thus forming a monolithic waste form which provides a multibarrier to the dispersion of wastes into the environment.

US Patent:

40200035, Apr 26, 1977

Filed:

Feb 24, 1976

Appl. No.:

5/660909

Inventors:

Meyer Steinberg - Huntington Station NY
Peter Colombo - Patchogue NY
Jacob Pruzansky - E. Islip NY

Assignee:

The United States of America as represented by the United States Energy
Research and Development Administration - Washington DC

International Classification:

G21F 916

US Classification:

2523011W

Abstract:

A method for the fixation of tritium comprising reacting tritiated water with calcium carbide to produce calcium hydroxide and tritiated acetylene, polymerizing the acetylene, and then incorporating the polymer in a solidifying matrix.

US Patent:

41742931, Nov 13, 1979

Filed:

Oct 12, 1977

Appl. No.:

5/841410

Inventors:

Peter Colombo - Patchogue NY
Robert M. Neilson - Setauket NY
Walter W. Becker - Shoreham NY

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G21F 920

US Classification:

2523011W

Abstract:

A process for disposing of radioactive aqueous waste solutions whereby the waste solution is utilized as the water of hydration to hydrate densified powdered portland cement in a leakproof container; said waste solution being dispersed without mechanical inter-mixing in situ in said bulk cement, thereafter the hydrated cement body is impregnated with a mixture of a monomer and polymerization catalyst to form polymer throughout the cement body. The entire process being carried out while maintaining the temperature of the components during the process at a temperature below 99. degree. C. The container containing the solid polymer-impregnated body is thereafter stored at a radioactive waste storage dump such as an underground storage dump.

US Patent:

56493231, Jul 15, 1997

Filed:

Jan 17, 1995

Appl. No.:

8/375387

Inventors:

Paul D. Kalb - Wading River NY
Peter Colombo - Patchogue NY

International Classification:

G21F 900

US Classification:

588 8

Abstract:

The present invention provides a composition and process for disposal of radioactive, hazardous and mixed wastes. The present invention preferably includes a process for multibarrier encapsulation of radioactive, hazardous and mixed wastes by combining substantially simultaneously dry waste powder, a non-biodegradable thermoplastic polymer and an anhydrous additive in an extruder to form a homogenous molten matrix. The molten matrix may be directed in a "clean" polyethylene liner, allowed to cool, thus forming a monolithic waste form which provides a multibarrier to the dispersion of wastes into the environment.

US Patent:

56782349, Oct 14, 1997

Filed:

Nov 7, 1994

Appl. No.:

8/334930

Inventors:

Peter Colombo - Patchogue NY
Paul D. Kalb - Wading River NY
John H. Heiser - Bayport NY

Assignee:

Associated Universities, Inc. - Washington DC

International Classification:

G21F 900

US Classification:

588 4

Abstract:

The present invention provides a method for encapsulating and stabilizing radioactive, hazardous and mixed wastes in a modified sulfur cement composition. The waste may be incinerator fly ash or bottom ash including radioactive contaminants, toxic metal salts and other wastes commonly found in refuse. The process may use glass fibers mixed into the composition to improve the tensile strength and a low concentration of anhydrous sodium sulfide to reduce toxic metal solubility. The present invention preferably includes a method for encapsulating radioactive, hazardous and mixed wastes by combining substantially anhydrous wastes, molten modified sulfur cement, preferably glass fibers, as well as anhydrous sodium sulfide or calcium hydroxide or sodium hydroxide in a heated double-planetary orbital mixer. The modified sulfur cement is preheated to about 135. degree. +-. 5. degree. C. , then the remaining substantially dry components are added and mixed to homogeneity.

US Patent:

59267720, Jul 20, 1999

Filed:

Oct 14, 1997

Appl. No.:

8/950023

Inventors:

Paul D. Kalb - Wading River NY
Peter Colombo - Patchogue NY

Assignee:

Brookhaven Science Associates LLC - Upton NY

International Classification:

G21F 900

US Classification:

588 8

Abstract:

The present invention provides a composition and process for disposal of radioactive, hazardous and mixed wastes. The present invention preferably includes a process for multibarrier encapsulation of radioactive, hazardous and mixed wastes by combining substantially simultaneously dry waste powder, a non-biodegradable thermoplastic polymer and an anhydrous additive in an extruder to form a homogenous molten matrix. The molten matrix may be directed in a "clean" polyethylene liner, allowed to cool, thus forming a monolithic waste form which provides a multibarrier to the dispersion of wastes into the environment.