불화물/염화물 용융염을 이용한 우라늄금속의 전해정련에 관한 연구

강영호; 황성찬; 심준보; 유재형; Young Ho Kang; Sung Chan Hwang; Joon Bo Shim; Jae Hyung Yoo

Journal of the Korean Industrial and Engineering Chemistry, Vol.13, No.1, 29-32, February, 2002

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불화물/염화물 용융염을 이용한 우라늄금속의 전해정련에 관한 연구

A Study on Electrorefining of Uranium Metal in Fluoride/Chloride Molten Salt

강영호^†, 황성찬, 심준보, 유재형

한국원자력연구소

Young Ho Kang^†, Sung Chan Hwang, Joon Bo Shim, and Jae Hyung Yoo

Korea Atomic Energy Research Institute, Korea

E-mail:

초록

본 연구에서는 KCl-LiCl과 LiF-NaF-KF(FLINAK)용융염에서 금속우라늄과 희토류를 원료물질로 하여 전해정련을 수행하였다. 음극 전착물의 주성분은 우라늄이었으며 다른 희토류 금속에 대한 우라늄의 분리계수는 염화물과 불화물 용윰염의 차이는 없었다. 용융염과 전착물내의 희토류의 농도는 희토류의 분해전압인 1.9 V 이상의 인가전압에서 급격히 증가되었으며, 전류효율은 1.0~1.9 V내에서 인가전압에 반비례하였다.

The electrorefining experiments with an anode composed of U, Y, Gd, Nd and Ce were carried out in the KCI-LiCl and LiF-NaF-KF(FLINAK) eutectic melt at 500 ℃ and 600 ℃, respectively. Uranium was the major component in the cathode deposits, and the separation factors of uranium with respect to the rate earths (REs) were nearly same in both electrolytes. REs concentrations in the molten salts and cathode deposits increased sharply at above 1.9 V, which was the decomposition voltage of REs. The current efficiency was inversely proportional to the applied voltage in the range of 1.0 V to 1.9 V (vs. STS304 and Ni).

Keywords:electrorefining;eletrodeposition;molten salt;separation factor

[References]

Burris L, Steunenberg RK, Miller WE, The Application of Electrorefining for Recovery and Purification of Fuel Discharged from the Integral Fast Reactor, CONF-861146-14 (1986)
Chow LS, Basco JK, Ackerman JP, Johnson TR, Continuous Extraction of Molten Chloride Salt with Liquid Cadmium Alloys, Global '93, 1080 (1993)
Stern KH, Rolison DR, J. Electrochem. Soc., 137, 178 (1990)
Yoko T, Bailey RA, J. Electrochem. Soc., 131, 2590 (1984)
Elwell D, Rao GM, Electrochim. Acta, 27, 673 (1982)
Matsumiya M, Takagi R, Fujita R, J. Nucl. Sci. Technol., 34, 310 (1997)
Koyama T, Iizuka M, Kondo N, Fujita R, Tanaka H, J. Nucl. Mater., 247, 227 (1997)
Mellors GW, J. Electrochem. Soc., 113, 60 (1966)
Kiprouros GJ, Flengas SN, J. Electrochem. Soc., 132, 1087 (1985)
Yang YS, Kang YH, Hwang SC, J. Korean Ind. Eng. Chem., 10(8), 1119 (1999)
남종우, 현대의 전기화학, 131, 청문각 (1995)
Reavis JG, Experimental Studies of Actinides in Molten Salts, LA-10340 (1985)
Sakamura Y, Hijikata T, Kinoshita K, Inoue T, Storvick TS, Krueger CL, Roy JJ, Grimmett DL, Fusselman SP, Gay RL, J. Alloy. Compd., 271-273, 592 (1998)
Sakamura Y, Hijikata T, Inoue T, Storvick TS, Krueger CL, Grantham LF, Fusselman SP, Grimmett DL, Roy JJ, J. Nucl. Sci. Technol., 35, 49 (1998)

[Related Articles]

[1] Burris L, Steunenberg RK, Miller WE, The Application of Electrorefining for Recovery and Purification of Fuel Discharged from the Integral Fast Reactor, CONF-861146-14 (1986)

[2] Chow LS, Basco JK, Ackerman JP, Johnson TR, Continuous Extraction of Molten Chloride Salt with Liquid Cadmium Alloys, Global '93, 1080 (1993)

[3] Stern KH, Rolison DR, J. Electrochem. Soc., 137, 178 (1990)

[4] Yoko T, Bailey RA, J. Electrochem. Soc., 131, 2590 (1984)

[5] Elwell D, Rao GM, Electrochim. Acta, 27, 673 (1982)

[6] Matsumiya M, Takagi R, Fujita R, J. Nucl. Sci. Technol., 34, 310 (1997)

[7] Koyama T, Iizuka M, Kondo N, Fujita R, Tanaka H, J. Nucl. Mater., 247, 227 (1997)

[8] Mellors GW, J. Electrochem. Soc., 113, 60 (1966)

[9] Kiprouros GJ, Flengas SN, J. Electrochem. Soc., 132, 1087 (1985)

[10] Yang YS, Kang YH, Hwang SC, J. Korean Ind. Eng. Chem., 10(8), 1119 (1999)

[11] 남종우, 현대의 전기화학, 131, 청문각 (1995)

[12] Reavis JG, Experimental Studies of Actinides in Molten Salts, LA-10340 (1985)

[13] Sakamura Y, Hijikata T, Kinoshita K, Inoue T, Storvick TS, Krueger CL, Roy JJ, Grimmett DL, Fusselman SP, Gay RL, J. Alloy. Compd., 271-273, 592 (1998)

[14] Sakamura Y, Hijikata T, Inoue T, Storvick TS, Krueger CL, Grantham LF, Fusselman SP, Grimmett DL, Roy JJ, J. Nucl. Sci. Technol., 35, 49 (1998)