Quantitative Analysis of Trace Metals in Lithium Molten Salt by ICP-AES

ICP-AES를 이용한 리튬 용융염내의 미량 금속성분원소 정량에 관한 연구

  • Kim, Do-Yang (Nuclear Chemistry Research Team, Korea Atomic Energy Research Institute) ;
  • Pyo, Hyung-Yeal (Nuclear Chemistry Research Team, Korea Atomic Energy Research Institute) ;
  • Park, Yong-Joon (Nuclear Chemistry Research Team, Korea Atomic Energy Research Institute) ;
  • Park, Yang-Soon (Nuclear Chemistry Research Team, Korea Atomic Energy Research Institute) ;
  • Kim, Won-Ho (Nuclear Chemistry Research Team, Korea Atomic Energy Research Institute)
  • 김도양 (한국원자력연구소 원자력화학연구팀) ;
  • 표형열 (한국원자력연구소 원자력화학연구팀) ;
  • 박용준 (한국원자력연구소 원자력화학연구팀) ;
  • 박양순 (한국원자력연구소 원자력화학연구팀) ;
  • 김원호 (한국원자력연구소 원자력화학연구팀)
  • Received : 2000.03.09
  • Published : 2000.06.25

Abstract

The quantitative analysis of various trace metals including fission products in lithium molten salts has been performed using a inductively coupled plasma atomic emission spectrometer (ICP-AES). The spectral interferences of lithium content, 500, 1,000 and 2,000 mg/L, in the sample solution were investigated using an optimum wavelength for the respective metal species. As a result, the line intensities for Y, Nd, Sr, and La had no influences from the lithium content up to 2,000 mg/L, while Mo, Ba, Ru, Pd, Rh, Zr and Ce showed spectral interferences of 10% to 50%. The group separation of metals from lithium in the molten salts solution was carried out by adding ammonia water into the solution. The recovery of Ru, Y, Rh, Zr, Nd, Ce, La and Eu was found to be over 90%, while Mo, Ba, Pd, and Sr provided low recovery percentages.

리튬 용융염($LiC+Li_2O$) 내에 미량으로 존재하는 핵분열생성물을 유도결합 플라스마 원자방출분광기(ICP-AES)를 이용하여 분석하였다. 분석대상 원소 중 감도가 가장 좋은 파장을 선택해 이들 파장에서 리튬 500, 1,000, 2,000 mg/L에 따른 분광학적 간섭 여부를 확인한 결과, 분석원소중 0.1 mg/L 이하의 Y, Nd, Sr, La, Eu의 방출세기는 리튬의 농도가 2,000 mg/L까지 증가시켜도 분광학적 간섭을 받지 않은 반면, Mo, Ba, Ru, Pd, Rh, Zr, Ce는 10% 에서 50% 이상 분광학적 간섭과 매트릭스에 의한 스펙트럼 방해가 나타났다. 리튬 매질로부터 미량 금속원소들을 군분리하기 위하여 모의 용융염 용액을 조제해 암모니아수를 가한 후 분리하고 다시 산처리하여 얻은 용액을 ICP-AES로 회수율을 측정하였다. 분석원소 중 Ru, Y, Rh, Zr, Nd, Ce, La, Eu의 회수율은 90% 이상인 반면 Mo, Ba, Pd, Sr는 낮은 회수율을 보여주었으며, 가해준 암모니아수 양이 증가할수록 회수율이 증가하는 경향을 보였다.

Keywords

References

  1. Nucl. Technol. v.93 T. Inoue;M. Sakata;H. Miyashiro
  2. ANL/CMT/CP-84354 Pyroprocessing oxide spent nuclear fuels for efficient disposal C. C. Mcpheeters;R. D. Pierce;T. P. Mulcahey
  3. ANL/CMT/CP-89562 Treatment of oxide spent nuclear fuel using the lithium reduction process E. J. Karell;R. D. Pierce;T. P. Mulcahey
  4. Proceedings of GLOVAL '95 Development of lithium process for reprocessing LWR spent fuel M. Fujie;Y. Shoji;T. Kobayashi
  5. Proceedings of GLOVAL '95 Analysis of reduction behavior of oxide fuels by lithium using UO₂and simulated materials T. Usami;M. Iizuka;T. Koyama
  6. Nucl. Technol. v.80 H. Kleykamp
  7. USAEC Division of Technical Information v.75 Analysis of Essential Nuclear Reactor Materials C. J. Rodden
  8. Radiochim. Acta v.1 A. Guillon;M. Colonomos;R. Sauvagnac
  9. EDB-9504 Solubility of molten salt into liquid lithium M. Hirotake;N. Teruhito;I. Yasuhiko
  10. CONF-9407103 Electrochemical separation of actinides and fission products in molten salt R. L. Gay;L. F. Grantham;S. P. Fusselman
  11. Spectrochimica Acta v.38B M. A. Floyd;R. W. Morrow;R. B. Farrar
  12. Analyst v.112 P. M. Jimenez;M. Gallego;M. Valcarcel
  13. J. Inorg. Nucl. Chem. v.6 T. Sato
  14. The Chemistry of the Transuranium Element C. Keller
  15. J. Chromatogr. v.482 W. Buchberger;K. Winsauer