Method and installation for the treatment of radioactive wastes

Details Method and installation for the treatment of radioactive wastes Method and installation for the treatment of radioactive wastes

2008-01-29

2008-01-29

Langel, Wayne A. (Department: 1754)

Hazardous or toxic waste destruction or containment

Destruction or containment of radioactive waste

Treating radioactive liquid

C588S002000, C588S003000, C204S518000, C422S159000

Reexamination Certificate

active

10494596

ABSTRACT:
The invention relates to a method and system for the treatment of radioactive wastes produced as a consequence of the operation of nuclear power plants with pressurized water reactors and boron reactivity regulation accompanied by the simultaneous production of environmentally acceptable substances of, for example, borax, calcium-magnesium borates, boron acid and sodium hydroxide solutions.As a result of the radioactive waste treatment method and system according to the invention, the following products are obtained: borax with an environmentally acceptable content of radioactive isotopes that contain only the cesium isotopes with a maximum total concentration of 800 Bq in one kilogram of borax; calcium, magnesium and/or calcium-magnesium borates with an environmentally acceptable content of radioactive isotopes; boron acid solution with an environmentally acceptable content of radioactive isotopes; sodium hydroxide solution containing only the cesium isotopes with a maximum total concentration of 800 Bq in one kilogram of sodium hydroxide; and radioactive waste containing under 5 g/l of boron acid.

REFERENCES:
patent: 4595528 (1986-06-01), Greenhalgh
patent: 4793947 (1988-12-01), Izumida et al.
patent: 4800042 (1989-01-01), Kurumada et al.
patent: 5096624 (1992-03-01), Dorr et al.
patent: 6448461 (2002-09-01), Toyohara et al.
patent: 51265 (1993-03-01), None
patent: 2163892 (1986-03-01), None
patent: 59-12400 (1984-01-01), None

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