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Received May 27, 2002
Accepted January 6, 2003
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Trapping Characteristics of Volatile Ruthenium Oxides by Y2O3 Filter
Spent Fuel Technology Development Team, Korea Atomic Energy Research Institute, P.O. Box 105, Daejeon 305-600, Korea
jmshin@kaeri.re.kr
Korean Journal of Chemical Engineering, January 2003, 20(1), 145-150(6), 10.1007/BF02697200
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Abstract
Yttria filter has been suggested as a trapping agent for gaseous oxides of ruthenium volatilized during DUPIC fuel fabrication process. Experiments were performed to evaluate the trapping characteristics of gaseous ruthenium oxides by yttria ceramic foam filters in the two-zone furnace under air condition. Yttria filter is expected to offer stable material in which the volatility of the ruthenium can be effectively trapped because of its incorporation into a lattice of high stability over 900 ℃ under air condition. The XRF result of ruthenium trapped on an yttria filter under air condition showed that concentrations of ruthenium on the back and the front faces of the filter decreased linearly with increasing superficial air velocity, and the back face concentration of filter was lower than the front face concentration by about 30-45%. The TGA result of ruthenium trapped on an yttria filter indicates that there is weight loss of 5.8 wt% up to 1,400 ℃, which is believed to be due to the fact that the thermally stable Y2Ru2O7 phase was formed on an yttria filter.
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Lee JS, Park HS, Gadsby RD, Sullivan J, "Burn Spent PWR Again in CANDU Reactors by DUPIC," Global 95, Versailles, France, May (1995)
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