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Title: Process for decontaminating radioactive liquids using a calcium cyanamide-containing composition. [Patent application]

Abstract

The present invention provides a process for decontaminating a radioactive liquid containing a radioactive element capable of forming a hydroxide. This process includes the steps of contacting the radioactive liquid with a decontaminating composition and separating the resulting radioactive sludge from the resulting liquid. The decontaminating composition contains calcium cyanamide.

Inventors:
Publication Date:
OSTI Identifier:
6300127
Assignee:
Dept. of Energy TIC; ERA-06-030048; EDB-81-097500
DOE Contract Number:
AC04-76DP00053
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; RADIOACTIVE WASTE PROCESSING; LIQUID WASTES; PRECIPITATION; CALCIUM COMPOUNDS; CHEMICAL REACTIONS; CYANAMIDES; DECONTAMINATION; NEPTUNIUM; PLUTONIUM; STRONTIUM; ACTINIDES; ALKALINE EARTH METAL COMPOUNDS; ALKALINE EARTH METALS; CARBONIC ACID DERIVATIVES; CLEANING; ELEMENTS; MANAGEMENT; METALS; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; PROCESSING; SEPARATION PROCESSES; TRANSURANIUM ELEMENTS; WASTE MANAGEMENT; WASTE PROCESSING; WASTES; 052001* - Nuclear Fuels- Waste Processing

Citation Formats

Silver, G.L.. Process for decontaminating radioactive liquids using a calcium cyanamide-containing composition. [Patent application]. United States: N. p., 1980. Web.
Silver, G.L.. Process for decontaminating radioactive liquids using a calcium cyanamide-containing composition. [Patent application]. United States.
Silver, G.L.. 1980. "Process for decontaminating radioactive liquids using a calcium cyanamide-containing composition. [Patent application]". United States. doi:.
@article{osti_6300127,
title = {Process for decontaminating radioactive liquids using a calcium cyanamide-containing composition. [Patent application]},
author = {Silver, G.L.},
abstractNote = {The present invention provides a process for decontaminating a radioactive liquid containing a radioactive element capable of forming a hydroxide. This process includes the steps of contacting the radioactive liquid with a decontaminating composition and separating the resulting radioactive sludge from the resulting liquid. The decontaminating composition contains calcium cyanamide.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1980,
month = 9
}
  • A vent gas containing radioactive iodine and methyl iodide is effectively decontaminated by chemically adsorbing the iodine contained in the vent gas onto an activated carbon layer at first, then physically adsorbing the methyl iodide contained in the vent gas onto another activated carbon layer separately disposed from the former activated carbon layer, and retaining the radioactive iodine and radioactive methyl iodide on the respective activated carbon layers for a definite period of radioactive decay.
  • The present invention provides a process for decontaminating radioactive waste water containing a radioactive element that forms a water-insoluble compound. This process includes the steps of forming the compound of the radioactive element, treating the resulting waste water with a ferrofluid, dispersing the ferrofluid, diluting the solids concentration of the resulting mixture with a coagulation initiator, such as ethyl alcohol or acetone, and collecting by use of a magnetic field, the resulting radioactive sludge. In a variation of the process, the steps involving the use of the coagulation initiator and the use of the ferrofluid are reversed.
  • A process is described for solidifying aqueous solutions or suspension containing radioactive B as more than 5% boric acid or a borate and more than 5% other solids. Slaked lime in 5 to 30 parts by weight are first added to the solution or suspension, and then 30 to 80 parts by weight of cement are added to form solid, transportable, and storable blocks.
  • A process is given for the removal of sulfur oxides from exhaust gases by absorbing with a slurry of red mud containing calcium ion which comprises the steps of: (1) contacting an exhaust gas containing sulfur oxides of not higher than about 100/sup 0/ C with a slurry of red mud containing calcium ion led from the next step (2) to take up sulfur oxides in the gas until ph of the slurry becomes in the range of 4.3 to less than 6 while maintaining the molar fraction of SO/sub 4/-- to total SO/sub 2/ in the slurry within themore » said pH range at 0.05 to 0.7; and then, (2) contacting the treated gas with a fresh slurry of red mud containing calcium ion to further take up sulfur oxides in the gas while maintaining the concentration of NaHSO/sub 3/ in the slurry at not more than about 8 g/l.« less