Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지
DOI QR코드

DOI QR Code

UO2 Kernel Particle Preparation for HTGR Nuclear Fuel

고온가스로용 핵연료 UO2 Kernel 입자제조

  • 정경채 (한국원자력연구원 입자연료개발부 피복입자 핵연료기술개발과제) ;
  • 김연구 (한국원자력연구원 입자연료개발부 피복입자 핵연료기술개발과제) ;
  • 오승철 (한국원자력연구원 입자연료개발부 피복입자 핵연료기술개발과제) ;
  • 조문성 (한국원자력연구원 입자연료개발부 피복입자 핵연료기술개발과제)
  • Published : 2007.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

The broth solution was prepared by the mixing of an uranyl nitrate, THFA, PVA, and water. The uranium concentration of the broth solution was $0.5{\sim}0.8$ mole-U/L and the viscosity of it was $30{\sim}80cSt$. The droplets of this broth solution were farmed in air and ammonia by the vibrating nozzle with the frequency of 100 Hz at the amplitude of $100{\sim}130V$. The diameter of the droplet was about $1900{\mu}m$ from using the nozzle diameter of 1 mm. The diameter of the aged gel was about $1400{\mu}m$ after aging in ammonia solution at $60{\sim}80^{\circ}C$, and the dried gel with the diameter of about $900{\mu}m$ was obtained after drying at room temperature or partially vacuum condition. The diameter of the calcined $UO_3$ microsphere after calcination at $600^{\circ}C$ appeared about $800{\mu}m$ in air atmosphere. Although the droplets of the same sizes were formed, the calcined microspheres of different sizes were manufactured in the case of the broth solutions of the different uranium concentration. The droplets of the desired diameters were obtained by the change of the nozzle diameters and the broth flow rates.

Keywords

References

  1. INEEL/EXT-05-02581, 'Next Generation Nuclear Plant Research and Development Program Plan,' Idaho National Engineering and Environmental Laboratory, 2005
  2. J. W. Chang, 'Status of Hydrogen Production by Nuclear Power,' KAERI/AR-600/2001, KAERI, 2001
  3. ORNL/TM-2004/1004, 'Status of Preconceptual Design of the Advanced High-Temperature Reactor(AHTR),' 2004
  4. IAEA-TECDOC-1085, 'Hydrogen as an Energy Carrier and Its Production by Nuclear Power,' 1999
  5. GIF-002-00, 'A Technology Roadmap for Generation IV Nuclear Energy Systems,' 2002
  6. K. Minato, H. Kikuchi, T. Tobita, and K. Fukuda, 'Improvements in Quality of As-manufactured Fuels for High-Temperature Gas-Cooled Reactors,' J. Nucl. Sci. & Tech., 34 [3] 325-33 (1997) https://doi.org/10.3327/jnst.34.325
  7. P. A. Hass, J. M. Begovich, A. D. Ryon, and J. S. Vauska, 'Consolidated Fuel Recycle Program-Refabrication, Chemical Flowsheet Conditions for Preparing Urania Spheres by Internal Gelation,' ORNL/TM-6850, (1979)
  8. R. E. Bullock, 'All-Ceramic Fuel Elements for the High Temperature Gas-Cooled Reactor(A Review),' High Temperature-High Pressure, 12 593-98 (1980)
  9. C. J. Brinker and G. WScherer, 'Sol-Gel Science (The Physics and Chemistry of Sol-Gel Processing),' Academic Press Inc., NewYork, 1990
  10. L. C. Klein, 'Sol-Gel Technology for Thin Film, Fibers, Preforms, Electronics, and Specialty Sphere,' Noyes, Park Ridge, N.J., (1988)
  11. P. A. Hass, F. G. Kitts, and H. Beutler, 'Preparation of Reactor Fuels by Sol-Gel Processes,' Chem. Eng. Prog. Symposium Series, 63 [80] 16-27 (1979)
  12. H. D. Ringel and E. Zimmer, 'The External Gelation of Thorium Process for Preparation of $ThO_2\;and\;(Th,U)O_2$ Fuel Kernels,' Nucl. Tech., 45 287-98 (1979)
  13. P. G. Alfredson, 'Development of Processes for Pilot Plant Production of Purified Uranyl Nitrate Solution,' AAEC/E-334, Australia, 1975
  14. B. Stinger, P. J. Russell, B. W. Davis, and K. A. Danso, 'Basic Aspects of the Gel-Precipitation Route to Nuclear Fuel,' Radiochimica Acta, 36 31-6 (1984)
  15. J. L. Collins, M. H. Lyoyd, and R. L. Fellows, 'The Basic Chemistry in the Internal Gelation Method of Precipitating Uranium as Determined by pH Measurement,' Radiochimica Acta, 42 121-34 (1987)
  16. G. Brambilla, P. Genontopulos and O. Neri., 'The SNAM Process for the Preparation of Ceramic Nuclear Fuel Microspheres: Laboratory Studies,' Energ. Nucl.(Milan), 17 17-24 (1970)
  17. L. Wolf, G. Ballensiefen, and W. Frohling, 'Fuel Elements of the High Temperature Pebble Bed Reactor,' Nucl. Eng. & Des., 34 [10] 93-108 (1975) https://doi.org/10.1016/0029-5493(75)90159-4
  18. P. Hass, 'Formation of Uniform Liquid Drops by Application of Vibration to Laminar Jets,' Ind. Eng. Chem. Res., 31 959-67 (1992) https://doi.org/10.1021/ie00003a043
  19. P. Naefe and E. Zimmer, 'Preparation of Uranium Kernels by as External Gelation Process,' Nucl. Tech. 42 [2] 163- 71(1979)
  20. J. Jannov, P. G. Alfredson, and V. K. Vilkaitis, 'Pilot Plant Development of Processes for the Production of Ammonium Diuranate,' AAEC/E-333, 1975