Plant for separating krypton and xenon from radioactive waste gases
A method of and apparatus for separating krypton from radioactive waste gases which become free during the chemical dissolution of burnt-off fuel particles and contain krypton and xenon. Simultaneously with the core fuel particles conveyed to the chemical dissolution, such quantity of chemically inactive carrier gas intermixable with the waste gases is added to the substances bringing about the chemical dissolution that after purification of the waste gas mixture from gas components such as oxygen, carbon dioxide, nitrous oxide, hydrocarbons and water steam and after subsequent cooling of the waste gas mixture to the boiling temperature of the liquid nitrogen, the quantity of xenon contained in the waste gas mixture is quantitatively precipitated in solid form. Thereupon the waste gas mixture is by means of liquid nitrogen, while simultaneously increasing the pressure, cooled to such an extent that krypton is precipitated. The apparatus for practicing the above mentioned method is characterized primarily in that a chamber communicating with a supply for the fuel particles and for carrier gas and equipped with a conveying device is provided with a connection to a dissolver. In a waste gas conduit connected to the dissolver are inserted in series a waste gas purifier, a nitrogen cooled container for separating solid xenon, a compressor for subjecting the waste gas mixture to a pressure of approximately 4 bars, and a nitrogen cooled separator for krypton with following shut-off device.
- Assignee:
- Kernforschungsanlage Julich Gmbh (Germany, Federal Republic of)
- Patent Number(s):
- US 4283367
- OSTI ID:
- 5992671
- Resource Relation:
- Patent Priority Date: Priority date 1 Jun 1974, German, Federal Republic of (F.R. Germany)
- Country of Publication:
- United States
- Language:
- English
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12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
FUEL REPROCESSING PLANTS
OFF-GAS SYSTEMS
KRYPTON
SEPARATION PROCESSES
RADIOACTIVE WASTE PROCESSING
XENON
COMPRESSORS
COOLING
GASEOUS WASTES
GASES
NITROGEN
PRECIPITATION
SCRUBBING
ELEMENTS
FLUIDS
MANAGEMENT
NONMETALS
NUCLEAR FACILITIES
PROCESSING
RARE GASES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
050800* - Nuclear Fuels- Spent Fuels Reprocessing
052001 - Nuclear Fuels- Waste Processing