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Method of storing radioactive rare gas. [gas occupies spaces in the zeolite crystal lattice]

Abstract

A method is provided to prevent dispersion of radioactive rare gas atoms by sealing them in a pressurised state within zeolite and thereby confining them in position within the zeolite crystal lattice. Radioactive rare gas is separated from exhaust gas and concentrated by using a low temperature adsorption means or liquefaction distillation means and necessary accessory means, and then it is temporarily stored in a gas holder. When a predetermined quantity of storage is reached, the gas is led to a sealing tank containing zeolite heated to 300 to 400/sup 0/C and held at 3,000 to 4,000 atmospheres, and under this condition radioactive rare gas is brought to occupy the spaces in the zeolite crystal lattice. After equilibrium pressure is reached by the pressure in the tank at that temperature, the gas is cooled in the pressurised state down to room temperature. Subsequently, the rare gas remaining in the tank and duct is recovered by a withdrawal pump into the gas holder. Thereafter, the zeolite with radioactive rare gas sealed in it is taken out from the tank and sealed within a long period storage container, which is then housed in a predetermined place for storage.
Publication Date:
May 15, 1975
Product Type:
Patent
Report Number:
JP 1976-133699; A
Reference Number:
AIX-08-333123; ERA-03-009818; EDB-78-013843
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; RADIOACTIVE WASTE STORAGE; ABSORPTION; GASEOUS DIFFUSION; POLLUTION CONTROL EQUIPMENT; RARE GASES; SAFETY; ZEOLITES; DIFFUSION; ELEMENTS; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; MANAGEMENT; MINERALS; NONMETALS; STORAGE; WASTE MANAGEMENT; WASTE STORAGE; 052002* - Nuclear Fuels- Waste Disposal & Storage
OSTI ID:
7209245
Country of Origin:
Japan
Language:
Japanese
Submitting Site:
INIS
Size:
Pages: 3
Announcement Date:
May 13, 2001

Citation Formats

Nagao, H, Miharada, H, Takiguchi, Y, Kanazawa, T, and Soya, M. Method of storing radioactive rare gas. [gas occupies spaces in the zeolite crystal lattice]. Japan: N. p., 1975. Web.
Nagao, H, Miharada, H, Takiguchi, Y, Kanazawa, T, & Soya, M. Method of storing radioactive rare gas. [gas occupies spaces in the zeolite crystal lattice]. Japan.
Nagao, H, Miharada, H, Takiguchi, Y, Kanazawa, T, and Soya, M. 1975. "Method of storing radioactive rare gas. [gas occupies spaces in the zeolite crystal lattice]." Japan.
@misc{etde_7209245,
title = {Method of storing radioactive rare gas. [gas occupies spaces in the zeolite crystal lattice]}
author = {Nagao, H, Miharada, H, Takiguchi, Y, Kanazawa, T, and Soya, M}
abstractNote = {A method is provided to prevent dispersion of radioactive rare gas atoms by sealing them in a pressurised state within zeolite and thereby confining them in position within the zeolite crystal lattice. Radioactive rare gas is separated from exhaust gas and concentrated by using a low temperature adsorption means or liquefaction distillation means and necessary accessory means, and then it is temporarily stored in a gas holder. When a predetermined quantity of storage is reached, the gas is led to a sealing tank containing zeolite heated to 300 to 400/sup 0/C and held at 3,000 to 4,000 atmospheres, and under this condition radioactive rare gas is brought to occupy the spaces in the zeolite crystal lattice. After equilibrium pressure is reached by the pressure in the tank at that temperature, the gas is cooled in the pressurised state down to room temperature. Subsequently, the rare gas remaining in the tank and duct is recovered by a withdrawal pump into the gas holder. Thereafter, the zeolite with radioactive rare gas sealed in it is taken out from the tank and sealed within a long period storage container, which is then housed in a predetermined place for storage.}
place = {Japan}
year = {1975}
month = {May}
}