Compositions – Radioactive compositions
Patent
1985-08-09
1987-04-28
Terapane, John F.
Compositions
Radioactive compositions
252628, 252631, 422159, 501152, 501153, 501154, 501155, G21F 916
Patent
active
046612912
ABSTRACT:
According to the method of this invention for fixation of incinerator ash, incinerator ash containing SiO.sub.2 and Al.sub.2 O.sub.3 is incorporated with NaOH or NaOH and an SiO.sub.2 -containing substance in such an amount that the resulting mixture contains 25 to 90 wt % of SiO.sub.2, 2 to 10 wt % of Na.sub.2 O, and more than 3 wt % of Al.sub.2 O.sub.3 which is less than the content of SiO.sub.2 in terms of mol %; 100 parts by weight of the mixture is mixed with more than 5 parts by weight of water; and the resulting mixture is subjected to hydrothermal reaction under a pressure of 70 kg/cm.sup.2 or above and at a temperature of 150.degree. C. and above, whereby the fixation is accomplished.
According to the method of this invention for fixation of iodine sorbent, iodine is allowed to be adsorbed on a silver-loaded silicate sorbent; the iodine sorbent is mixed with 1 to 30 wt % of at least one of sodium hydroxide, potassium hydroxide, and barium hydroxide; and the resulting mixture is subjected to hydrothermal reaction under a pressure of 70 kg/cm.sup.2 and above and at a temperature of 150.degree. C. and above, whereby the fixation is accomplished.
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Burger et al., 1983, The Status of Radioiodine Control for Nuclear Fuelreprocessing Plants, Prepared for U.S. D.O.E. 49 pages.
Vance et al., 1981, Ceramic Phases for Immobilization of .sup.129 I. Rockwell International Energy Systems Group, California, Jul. 43 pages.
Hoshino Yoshihiro
Kubota Takeshi
Tanuma Hiroyuki
Yamasaki Nakamichi
Hamburg C. Bruce
Jordan Frank J.
Kanesaka Manabu
Locker Howard J.
Mitsui Engineering & Shipbuilding Co. Ltd.
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