Decontamination method for radiation contaminated metal
Description
An organic acid solution is used as a decontamination liquid, and base materials of radiation contaminated metals are dissolved in the solution. The concentration of the organic acid is measured, and the organic acid is supplied by an amount corresponding to the lowering of the concentration. The decontamination liquid wastes generated during the decontamination step are decomposed, and metals leached in the organic acid solution are separated. With such procedures, contamination intruded into the inside of the mother materials of the metals can be removed, and radioactivity of the contaminated metals such as stainless steels and carbon steels can be eliminated, or the radiation level thereof can be reduced. In addition, the amount of secondary wastes generated along with the decontamination can be suppressed. (T.M.)
Availability note (English)
Available from JAPIO. Also available from EPO.Additional details
Publishing Information
- Imprint Pagination
- 14 p.
- IPC:
- Int. Cl. G21F9/28; G21F9/12.
- IPC
- Int. Cl. G21F9/28; G21F9/12.
- Patent number
- JP patent document 9-113690/A/
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 28065087
- Subject category
- S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- CARBON STEELS; CONTAMINATION; DECOMPOSITION; DISSOLUTION; LEACHING; LIQUID WASTES; ORGANIC ACIDS; RADIOACTIVE WASTE PROCESSING; STAINLESS STEELS; VOLUME
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; CHEMICAL REACTIONS; HIGH ALLOY STEELS; IRON ALLOYS; IRON BASE ALLOYS; MANAGEMENT; ORGANIC COMPOUNDS; SEPARATION PROCESSES; STEELS; TRANSITION ELEMENT ALLOYS; WASTE MANAGEMENT; WASTE PROCESSING; WASTES
Optional Information
- Secondary number(s)
- JP patent application 7-270989.