Process for treating waste gas in reprocessing of used nuclear f

Details Process for treating waste gas in reprocessing of used nuclear f Process for treating waste gas in reprocessing of used nuclear f

1973-12-26

1984-11-13

Lechert, Jr., Stephen J.

Compositions

Radioactive compositions

Nuclear reactor fuel

252631, 423249, G21F 902

Patent

active

044824793

ABSTRACT:
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.

REFERENCES:
patent: 3501923 (1970-03-01), Lehmer
patent: 3748864 (1973-07-01), Lofredo et al.
patent: 3944646 (1976-03-01), Martin
Bendixsen et al., "Operation of the ICPP Rare-Gas Recovery Facility During Fiscal Year 1970", ICP-1001, pp. ii-v and 1-12, U.S.A.E.C., 1971.
Bendixsen et al., "Rare-Gas Recovery Facility at the Idaho Chemical Processing Plant", IN-1221, pp. ii-v and 1-15, U.S.A.E.C., 1969.
Bendixsen et al., "Rare-Gas Recovery Facility at the ICPP", Transaction of the American Nuclear Society, 1969 Winter Meeting, pp. 497-498, 1969.
Bendixsen et al., "Operational Performance and Safety of a Cryogenic System for Krypton Recovery", Transactions of the American Nuclear Society 1972 Annual Meeting, pp. 97-98, 1972.

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