저 탄소강 음극을 사용한 금속우라늄의 용융염 전해정련에 관한 연구

양영석; 강영호; 황성찬

Journal of the Korean Industrial and Engineering Chemistry, Vol.10, No.8, 1119-1123, December, 1999

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저 탄소강 음극을 사용한 금속우라늄의 용융염 전해정련에 관한 연구

Study on Molten Salt Electrorefining of Uranium Metal Using Low Carbon Steel Cathode

양영석, 강영호, 황성찬

초록

본 연구는 용융염계에서 우라늄금속의 건식전해정련공정을 개발하기 위해서 수행되었다. 금속우라늄과 CdCl₂와의 반응은 약 3시간이 소요되었으며, 모든 전해전달실험에서 우라늄금속 석출물들은 음극표면에서 성장한 수지상으로 얻어졌다. 수지상의 형태는 부가전압에 따라 변화되었으며, 전류효율은 전류밀도가 증가함에 따라 감소하였다. 반응시간이 6시간 경과된 후에 석출속도는 변화하지 않았으며, 전류밀도가 100∼150 mA/cm²이고 교반속도가 약 75rpm일 때 최대석출속도를 얻었다. 또한, 전류효율은 음극에 있는 나선형 홈의 피치가 작을수록 증가되었다.

In this paper, electrorefining of uranium metal was studied to develop pyrometallurgical processing technology in molten salt system. The reaction between uranium metal and CdCl₂ was taken about 3 hours and the uranium metal deposits were obtained in the form of dendrite grown on the cathode surface in every electrotransport experiment. The shapes of dendrite were changed according to the applied voltages. Current efficiency was decreased with the increase of current density. Deposition rate was not changed after 6 hours and its maxium was obtained at 100∼150 mA/cm² of current density and about 75 rpm of stirring speed, respectively. Also, the current efficiency was increased with decrease of the pitch of spiral groove curved on cathode.

Keywords:electrorefining;eletrodeposition;molten salt;uranium metal

[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, Groval '93, 1080 (1993)
Kanno M, Yamagami S, Denki Kagaku, 43, 379 (1975)
Gay EC, Tomczuk Z, Miller WE, Plant-Scale Anodic Dissolution of Unirradiated IFR Fuel Pins, CONF-930913 (1993)
Kanno M, Yamagami S, Denki Kagaku, 43, 557 (1975)
Tomczuk Z, Ackerman JP, Wolson RD, Miller WE, Electrochem. Soc., 139, 3523 (1997)
Koyama T, Iizuka M, Shoji Y, Fugita R, Kobayashi T, Tokiwai M, J. Nucl. Sci. Technol., 34, 384 (1997)
Iizuka M, Koyama T, Kondo N, Fujita R, Tanaka H, J. Nucl. Mater., 247, 183 (1997)
염희택, 이주성, "도금·표면처리," 54, 문운당 (1996)
常盤井守泰, 金屬燃料 FBR サイクル, 原子力工學, 33 (1987)
常盤井守泰, FBR 金屬燃料の乾式再處理技術, 原子力工學, 34 (1988)
Inman D, Hills GJ, Young L, O'M Bockris J, Trans. Faraday Soc., 55, 1904 (1959)

[Referenced By]

[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, Groval '93, 1080 (1993)

[3] Kanno M, Yamagami S, Denki Kagaku, 43, 379 (1975)

[4] Gay EC, Tomczuk Z, Miller WE, Plant-Scale Anodic Dissolution of Unirradiated IFR Fuel Pins, CONF-930913 (1993)

[5] Kanno M, Yamagami S, Denki Kagaku, 43, 557 (1975)

[6] Tomczuk Z, Ackerman JP, Wolson RD, Miller WE, Electrochem. Soc., 139, 3523 (1997)

[7] Koyama T, Iizuka M, Shoji Y, Fugita R, Kobayashi T, Tokiwai M, J. Nucl. Sci. Technol., 34, 384 (1997)

[8] Iizuka M, Koyama T, Kondo N, Fujita R, Tanaka H, J. Nucl. Mater., 247, 183 (1997)

[9] 염희택, 이주성, "도금·표면처리," 54, 문운당 (1996)

[10] 常盤井守泰, 金屬燃料 FBR サイクル, 原子力工學, 33 (1987)

[11] 常盤井守泰, FBR 金屬燃料の乾式再處理技術, 原子力工學, 34 (1988)

[12] Inman D, Hills GJ, Young L, O'M Bockris J, Trans. Faraday Soc., 55, 1904 (1959)