Trapping Characteristics of Volatile Ruthenium Oxides by Y2O3 Filter

Jin-Myeong Shin; Jang-Jin Park

Korean Journal of Chemical Engineering, Vol.20, No.1, 145-150, January, 2003

DOI10.1007/BF02697200 Export Citation

Trapping Characteristics of Volatile Ruthenium Oxides by Y2O3 Filter

Jin-Myeong Shin^†, and Jang-Jin Park

Spent Fuel Technology Development Team, Korea Atomic Energy Research Institute, P.O. Box 105, Daejeon 305-600, Korea

E-mail:

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.

Keywords:Yttria Filter;Ruthenium Oxides;Y2Ru2O7;DUPIC Nuclear Fuels;Volatilization

[References]

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[1] Cains PW, Barnes SJ, Frankisg P, Delaney M, Warning S, "Absorption of Volatile Ruthenium," AERE-R 13179 (1998)

[2] Cho YH, Chun KS, Park JJ, Shin JM, Park HS, Ryu JS, "Development of Trapping Material for Radioactive Ruthenium in OREOX Process," Proceedings of the Korean Nuclear Society Autumn Meeting," Vol (II), Seoul, Korea, October 28, Korean Nuclear Society, Seoul, 860 (1995)

[3] Eicher B, Zude F, Fan W, Trautmann N, Herrmann G, Radiochim. Acta, 56, 133 (1992)

[4] Kim EH, Choung WM, Kim YK, Park JH, Yoo JH, Choi CS, Korean J. Chem. Eng., 17(2), 217 (2000)

[5] Lee JS, Park HS, Gadsby RD, Sullivan J, "Burn Spent PWR Again in CANDU Reactors by DUPIC," Global 95, Versailles, France, May (1995)

[6] Lee JW, Yang MS, Park HS, "DUPIC Nuclear Fuel Manufacturing and Process Technology Development," KAER/RR-2022/99, KAERI, Taejon, Korea (2000)

[7] Mass ET, Longo JM, Nucl. Technol., 47, 451 (1980)

[8] Park HS, Chun KS, Kim JH, Cho YH, Paek SU, Kang HS, Na JW, Lee HG, Park KI, Yang SY, "A Study on the Direct Use of Spent PWR Fuel in CANDU," KAERI/RR-1325/93 (1993)

[9] Sakurai T, hinatsu Y, Takahashi A, Fujisawa G, J. Phys. Chem., 89, 1892 (1985)

[10] Seddon EA, Seddon KR, "The Chemistry of Ruthenium," Elsevier, New York (1984)

[11] Shin JM, Park JJ, Chun KS, Kim JH, Yang MS, "Behavior of Ruthenium Trapped on an Yttria Filter under Reduction and oxidation," Proceedings of the 11th Pacific Basin Nuclear Conference, Vol. (I), Banff, Canada, May 3-7, Canadian Nuclear Society, Seoul, 529 (1998)

[12] Weast RC, "Handbook of Chemistry and Physics," CRC Press, Cleveland, Ohio (1997)

[13] Yang MS, Jung IH, Lee JW, Choi HB, Park JJ, Bae KK, Lee JS, Park HS, "Prospect and Challenges of DUPIC Development in Korea," Proceedings of the 11th Pacific Basin Nuclear Conference, CNS, Banff, Canada, May, 1305 (1998)