TY - JOUR
T1 - An extreame disposition method for low-level radioactive wastes using supercritical water (3)
AU - Sugiyama, Wataru
AU - Yamamura, Tomoo
AU - Park, Ki Chul
AU - Tomiyasu, Hiroshi
AU - Shiokawa, Yoshinobu
AU - Okada, Hidetsugu
AU - Sugita, Yuji
N1 - Funding Information:
The authors wish to thank Mr. Mitsuyuki Takahashi and Ms. Kaori Sato of Tohoku University for their cooperation in our experiments. This work was performed under the inter-university cooperative research program of the Institute for Materials Research, Tohoku University.
PY - 2005/7
Y1 - 2005/7
N2 - Disposition of low-level radioactive wastes has been performed in supercritical water with RuO2 as a catalyst without the addition of any oxidizing materials. These wastes arose from nuclear power plants etc., constituting of nonflammable organic materials, such as fire resistant sheeting and rubber gloves. We investigated the distribution behavior of iron and cobalt attached to nonflammable organic materials, in solid, liquid and gas phases during the decomposition of this method. The distributions of these elements under various conditions (initial amounts) were determined by using their radioisotopes as simulated low-level radioactive wastes in order to ease the detection of trace amounts of elements even in solid and gas phases. Iron and cobalt were found only in the solid phase when non-radioactive iron hydroxide was added as a precipitation reagent before the supercritical-water reaction.
AB - Disposition of low-level radioactive wastes has been performed in supercritical water with RuO2 as a catalyst without the addition of any oxidizing materials. These wastes arose from nuclear power plants etc., constituting of nonflammable organic materials, such as fire resistant sheeting and rubber gloves. We investigated the distribution behavior of iron and cobalt attached to nonflammable organic materials, in solid, liquid and gas phases during the decomposition of this method. The distributions of these elements under various conditions (initial amounts) were determined by using their radioisotopes as simulated low-level radioactive wastes in order to ease the detection of trace amounts of elements even in solid and gas phases. Iron and cobalt were found only in the solid phase when non-radioactive iron hydroxide was added as a precipitation reagent before the supercritical-water reaction.
KW - Disposition
KW - Low-level radioactive wastes
KW - Radiometric analysis
KW - Recovery of radioactivity as solids
KW - Supercritical water
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U2 - 10.1016/j.pnucene.2005.05.046
DO - 10.1016/j.pnucene.2005.05.046
M3 - Article
AN - SCOPUS:28444499963
VL - 47
SP - 448
EP - 453
JO - Progress in Nuclear Energy
JF - Progress in Nuclear Energy
SN - 0149-1970
IS - 1-4
ER -