Hazardous or toxic waste destruction or containment – Destruction or containment of radioactive waste – By fixation in stable solid media
Patent
1996-09-12
2000-07-04
Mai, Ngoclan
Hazardous or toxic waste destruction or containment
Destruction or containment of radioactive waste
By fixation in stable solid media
588252, 588 18, 588 20, 428469, 501155, 264681, 427370, 134 4, G21F 900
Patent
active
06084146&
ABSTRACT:
Processes for immobilizing solid contaminated materials, such as radioactive species, hazardous species, or combinations of both radioactive and hazardous species, comprise mixing the contaminated materials with hydrated ferric oxides, and then pressing the mixture at a temperature of at least about 150.degree. C. and gradually removing a large part of the water while under pressure to produce a solid composition. The water content of the mixture is adjusted if necessary. Contaminated materials dissolved or suspended in an aqueous solution can be immobilized by precipitating hydrated ferric oxide in the solution, and adjusting the water content and pressing, as above. In another process in accordance with the present invention, hydrated ferric oxides are deposited on metal surfaces. The deposited ferric oxide is pressed to produce a solid coating adhered to the surface, to retard corrosion. A ceramic body of ferric oxide composition may also be made in accordance with the present invention.
REFERENCES:
patent: 2728696 (1955-12-01), Singer
patent: 3944683 (1976-03-01), Church et al.
patent: 4014766 (1977-03-01), Watanabe et al.
patent: 4086182 (1978-04-01), Hengelhaupt et al.
patent: 4108769 (1978-08-01), Krieg et al.
patent: 4118243 (1978-10-01), Sandesara
patent: 4241039 (1980-12-01), Koh et al.
patent: 4318788 (1982-03-01), Duffey
patent: 4343706 (1982-08-01), Etzel et al.
patent: 4369073 (1983-01-01), Fukutsuka et al.
patent: 4389254 (1983-06-01), Tusset et al.
patent: 4427034 (1984-01-01), Nagata et al.
patent: 4454098 (1984-06-01), Scheithauer et al.
patent: 4508641 (1985-04-01), Hanulik
patent: 4518508 (1985-05-01), Conner
patent: 4601832 (1986-07-01), Hooykaas
patent: 4606829 (1986-08-01), Rice et al.
patent: 4642203 (1987-02-01), Matsunaga et al.
patent: 4642204 (1987-02-01), Burstrom et al.
patent: 4649019 (1987-03-01), Jawor
patent: 4680126 (1987-07-01), Frankard et al.
patent: 4693798 (1987-09-01), Gale et al.
patent: 4726895 (1988-02-01), Martinez
patent: 4834917 (1989-05-01), Ramm et al.
patent: 4970079 (1990-11-01), Hem et al.
patent: 5013453 (1991-05-01), Walker
patent: 5073305 (1991-12-01), Miyao et al.
patent: 5093007 (1992-03-01), Domvile
patent: 5106508 (1992-04-01), Schwitzgebel
patent: 5177305 (1993-01-01), Pichat
patent: 5221323 (1993-06-01), Li
patent: 5252003 (1993-10-01), McGahan
patent: 5290589 (1994-03-01), Clough et al.
patent: 5292435 (1994-03-01), Schwitzgebel
patent: 5302565 (1994-04-01), Crowe
patent: 5326439 (1994-07-01), Brewster
patent: 5330658 (1994-07-01), Grant et al.
patent: 5352517 (1994-10-01), Clough et al.
patent: 5358643 (1994-10-01), McClintock
patent: 5505857 (1996-04-01), Misra et al.
patent: 5520917 (1996-05-01), Mizuguchi et al.
patent: 5678235 (1997-10-01), Crowe
patent: 5732564 (1998-03-01), Kujawa et al.
"Steam Generator Sludge at the Indian Point 2 Nuclear Station: Implications to Tube Corrosion", A. Barkatt et al., Corrosion 95, The NACE Annual Conference and Corrosion Show, Paper No. 453, pp. 453/1-453/9; Mar. 1995.
"Characterization of Sludge from Indian point 2", A. Barkatt et al., EPRI PWR Sludge Management Workshop, pp. 21-1-21-17; May 1994.
"Composition, Characteristics and Study of Sludge Formation in the Indian Point 2 PWR Steam Generators", A Barkatt et al., Corrosion 93, The NACE Annual Conference and Corrosion Show, Paper No. 365, pp. 365/1-365/6; 1993.
"Characterization and Simulation of Hematite-Rich Deposits in PWR Steam Generators", A. Barkatt et al., NE-Vol. 8, Steam Generator Sludge Deposition in Recirculating and Once Through Steam Generator Upper Tube Bundle and Support Plates, eds. R.L. Baker et al., ASME, New York, N.Y., pp. 69-73; 1992.
"Studies of the Properties and Build-Up of Hard Sludge at Indian Point 2", A. Barkatt et al., EPRI PWR Plant Chemists' Meeting, Nov. 1992.
"Immobilisation of high level nuclear reactor wastes in SYNROC", A.E. Ringwood et al., Nature, vol. 278, pp. 219-223; Mar. 15, 1979.
"Synroc Production Using A Fluid Bed Calciner" Ackerman et al., Mat. Res. Soc. Symp. Proc. vol. 15 (1983), pp. 63-71.
"The SYNROC process: A geochemical approach to nuclear waste immobilization", A.E. Ringwod et al., Geochemical Journal, vol. 13, pp. 141-165; 1979.
"Evolution, Composition and Properties of Steam Generator Sludge at Indian Point 2: Modeling and Observations", A. Barkatt, Proceedings: PWR Plant Chemistry Meeting, vol. 2, Sessions 4-8; Feb. 1996, based on a presentation given Nov. 1-3, 1995.
Barkatt Aaron
Gmurczyk Marta
Labuda Ewa
Wilder Donna M.
Consolidated Edison Company of New York, Inc.
Mai Ngoclan
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