Published August 26, 1997 | Version v1
Patent Metadata-only

Radioactive gaseous waste processing method

Creators

Description

Radioactive wastes such as vinyl chloride resins and rubbers contaminated by ruthenium (Ru) generated from a nuclear power plant are processed in an incinerator or a melting furnace. Radioactive gaseous wastes containing generated RuO4 are at first put to primary filtration and secondary filtration at a temperature range of from 700 to 800degC to remove dusts. Water is sprayed to lower the gas temperature to a range of from 150 to 350degC. They are brought into contact with adsorbents mainly comprising silica and iron oxide to adsorb and remove RuO4. Then, they are brought into contact with adsorbents mainly comprising calcium to absorb and remove HCl and SOx. With such procedures, RuO4, HCl and SOx can be removed from the radioactive wastes containing RuO4 without generation of wastes. Accordingly, various equipments and an great amount of handling operations which have been required in prior cases are no more necessary. (T.M.)

Availability note (English)

Available from JAPIO. Also available from EPO.

Additional details

Publishing Information

Imprint Pagination
4 p.
IPC:
Int. Cl. G21F9/02; G21F9/32.
IPC
Int. Cl. G21F9/02; G21F9/32.
Patent number
JP patent document 9-222496/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
29006948
Subject category
S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
CALCINATION; CONTAMINATION; GASEOUS WASTES; MELTING; RADIOACTIVE WASTE PROCESSING; RADIOACTIVE WASTES; RUBBERS; RUTHENIUM; RUTHENIUM OXIDES; TEMPERATURE DEPENDENCE; VINYL CHLORIDE
Descriptors DEC
CHALCOGENIDES; CHEMICAL REACTIONS; CHLORINATED ALIPHATIC HYDROCARBONS; DECOMPOSITION; ELASTOMERS; ELEMENTS; HALOGENATED ALIPHATIC HYDROCARBONS; MANAGEMENT; MATERIALS; METALS; ORGANIC CHLORINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; ORGANIC POLYMERS; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PLATINUM METALS; POLYMERS; PYROLYSIS; RADIOACTIVE MATERIALS; RUTHENIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; WASTE MANAGEMENT; WASTE PROCESSING; WASTES

Optional Information

Secondary number(s)
JP patent application 8-31544.