Hazardous or toxic waste destruction or containment – Destruction or containment of radioactive waste – By fixation in stable solid media
Patent
1997-07-14
1998-10-20
Mai, Ngoclan
Hazardous or toxic waste destruction or containment
Destruction or containment of radioactive waste
By fixation in stable solid media
588 16, 976DIG392, G21F 900
Patent
active
058262032
ABSTRACT:
A method for solidifying a radioactive iodine-containing waste, in which volatilization of radioactive iodine outward can be suppressed during solidification, and a solidified waste having a high level of confinement of radioactive iodine and a long term stability can be obtained. The method comprised mixing a granular waste containing radioactive iodine, e.g. a granular iodine adsorbent having radioactive iodine adsorbed and collected thereon, with a metal powder, e.g. a copper powder, having a corrosion resistance in an environment of solidified waste disposal, filling the resulting mixture in a metal capsule, and subjecting the whole to hot isostatic pressing to effect solidification. In the resulting solidified waste, particles of the radioactive iodine-containing adsorbents are dispersed and retained in the sintered matrix of the metal powder formed through the isostatic pressing.
REFERENCES:
patent: 3262885 (1966-07-01), Rushbrook
patent: 4088737 (1978-05-01), Thomas et al.
patent: 4661291 (1987-04-01), Yamasaki et al.
Patent Abstracts of Japan, vol. 016, No. 536 (P-1449), Nov. 6, 1992, & JP 04 204099 A (Hitachi Ltd), Jul. 24, 1992.
Fukumoto Masahiro
Kanzaki Manabu
Doryokuro Kakunenryo Kaihatsu Jigyodan
Mai Ngoclan
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