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Process for treating waste gas in reprocessing of used nuclear fuel

Patent ·
OSTI ID:6012262
; ; ;
A waste gas generated in the reprocessing of used nuclear fuel is at first subjected to removal of explosive, gaseous substances such as hydrocarbons and nitrogen oxides, and materials capable of forming the explosive gaseous substances, such as oxygen, and condensible substances such as carbon dioxide, water and ammonia from the waste gas, and then to cryogenic distillation, thereby separating and recovering Kr-85 from the waste gas. As the separation and recovery of Kr-85 is carried out by cryogenic separation after the removal of the substances having a possibility to explode in a cryogenic distillation apparatus and also the removal of condensible substances having a possibility to clog a piping system of the apparatus, the operation of the apparatus is ensured. It is also disclosed that the oxygen and nitrogen oxides can be completely removed by catalytic hydrogen reduction.
Assignee:
Hitachi Ltd. (Japan)
Patent Number(s):
US 4482479
OSTI ID:
6012262
Country of Publication:
United States
Language:
English

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Related Subjects

050800 -- Nuclear Fuels-- Spent Fuels Reprocessing
052001* -- Nuclear Fuels-- Waste Processing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
AMMONIA
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CRYOGENICS
DEHYDROGENATION
DEVOLATILIZATION
DISTILLATION
DISTILLATION EQUIPMENT
ELEMENTS
ENERGY SOURCES
EQUIPMENT
EVEN-ODD NUCLEI
FOULING
FUELS
GASEOUS WASTES
HOURS LIVING RADIOISOTOPES
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KRYPTON 85
KRYPTON ISOTOPES
MANAGEMENT
MATERIALS
MATTER
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
NONMETALS
NUCLEAR FUELS
NUCLEI
OPERATION
ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PROCESSING
RADIOACTIVE WASTE PROCESSING
RADIOISOTOPES
REACTOR MATERIALS
REMOVAL
REPROCESSING
SEPARATION EQUIPMENT
SEPARATION PROCESSES
SPENT FUELS
VOLATILE MATTER
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER
YEARS LIVING RADIOISOTOPES