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Solidification method of radioactive wastes

Patent:

Abstract

Metal solidification material can completely seal radioactive wastes and it has high sealing effect even if a trace amount of evaporation should be caused. In addition, the solidification operation can be conducted safely by using a metal having a melting point of lower than that of the decomposition temperature of the radioactive wastes. Further, the radioactive wastes having a possibility of evaporation and scattering along with oxidation can be solidified in a stable form by putting the solidification system under an inert gas atmosphere. Then in the present invention, a metal is selected as a solidification material for radioactive wastes, and a metal, for example, lead or tin having a melting point of lower than that of the decomposition temperature of the wastes is used in order to prevent the release of the wastes during the solidification operation. Radioactive wastes which are unstable in air and scatter easily, for example, Ru or the like can be converted into a stable solidification product by conducting the solidification processing under an inert gas atmosphere. (T.M.).
Publication Date:
Jul 24, 1992
Product Type:
Patent
Report Number:
JP 4-204099; A
Reference Number:
JPN-93-001324; EDB-93-022508
Resource Relation:
Patent File Date: 30 Nov 1990
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; RADIOACTIVE WASTES; SOLIDIFICATION; EVAPORATION; GASES; INACTIVATION; LEAD; MELTING POINTS; RUTHENIUM; SEALS; TIN; ELEMENTS; FLUIDS; MATERIALS; METALS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; PLATINUM METALS; RADIOACTIVE MATERIALS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENTS; TRANSITION TEMPERATURE; WASTES; 052001* - Nuclear Fuels- Waste Processing
OSTI ID:
6896353
Research Organizations:
Hitachi Ltd., Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: PPN: JP 2-329055
Availability:
Available from JAPIO. Also available from INPADOC.
Submitting Site:
JPN
Size:
Pages: (2 p)
Announcement Date:

Patent:

Citation Formats

Baba, Tsutomu, Chino, Koichi, Sasahira, Akira, and Ikeda, Takashi. Solidification method of radioactive wastes. Japan: N. p., 1992. Web.
Baba, Tsutomu, Chino, Koichi, Sasahira, Akira, & Ikeda, Takashi. Solidification method of radioactive wastes. Japan.
Baba, Tsutomu, Chino, Koichi, Sasahira, Akira, and Ikeda, Takashi. 1992. "Solidification method of radioactive wastes." Japan.
@misc{etde_6896353,
title = {Solidification method of radioactive wastes}
author = {Baba, Tsutomu, Chino, Koichi, Sasahira, Akira, and Ikeda, Takashi}
abstractNote = {Metal solidification material can completely seal radioactive wastes and it has high sealing effect even if a trace amount of evaporation should be caused. In addition, the solidification operation can be conducted safely by using a metal having a melting point of lower than that of the decomposition temperature of the radioactive wastes. Further, the radioactive wastes having a possibility of evaporation and scattering along with oxidation can be solidified in a stable form by putting the solidification system under an inert gas atmosphere. Then in the present invention, a metal is selected as a solidification material for radioactive wastes, and a metal, for example, lead or tin having a melting point of lower than that of the decomposition temperature of the wastes is used in order to prevent the release of the wastes during the solidification operation. Radioactive wastes which are unstable in air and scatter easily, for example, Ru or the like can be converted into a stable solidification product by conducting the solidification processing under an inert gas atmosphere. (T.M.).}
place = {Japan}
year = {1992}
month = {Jul}
}