EPMA Analysis of Inter-reaction Layer in Irradiated U3Si-Al Fuels

EPMA를 이용한 U3Si/Al 조사 핵연료의 반응층 분석

  • Received : 2004.04.19
  • Accepted : 2004.06.11
  • Published : 2004.08.25

Abstract

Fission products and Inter reaction layer of $U_3Si-Al$ dispersion fuel, irradiated in HANARO research reactor with 121 kW/m of maximum liner power and 63 at% of average burn-up, was characterization by EPMA (Electron Probe Micro Analyzer). The fuel punching system developed by Irradiated Materials Examination Facility (IMEF) has used to make these samples for the EPMA. With this system a very small and thin specimen which is 1.57 mm in diameter and 2 mm in thickness respectively has been fabricated to protect the EPMA operator from high radioactive fuel and to mini-mize the equivalent dose rate less than 150 mSv/h. EPMA was performed to observe layers of sectional, Inter-reaction and oxide with specimens of cutting and polished. Stoichiometry in the Inter-reaction layer with $16{\mu}m$ of thickness was $U_{2.84}$ Si $Al_{14}$ with calibration of $UO_2$ and $U_{3.24}$ Si $Al_{14.1}$ with calibration of standard specimen. metallic precipitates in this layer were not observed using fission products examination.

Keywords

EPMA;nuclear fuel;post irradiation examination;$U_3Si/Al$ fuel

References

  1. B. O. Yoo, Y. S. Choo, K. P. Hong., 'Post Irradiation Examination of HANARO Nuclear Mini-Element Fuel', KAERI/TR-1836, KAERI, 2001.
  2. Y. H. Jung, B. O. Yoo, Y. S. Choo, K. P. Hong, 'Irradiated U3Si Fuel EPMA Quantitative', KAERI, 2000.
  3. I. H. Jung, K. C. Song, K. H. Kang, B. O. Yoo, Y. H. Jung, H. S. Park., 'Characterization of Irradiated SIMFUEL', Metals and Materials International, 7, 514(2001).
  4. H. Kleykamp, J. Nucl. Mater. 131, 221(1985).
  5. B. O. Yoo. Y. S. Choo, K. P. Hong., 'Post Irradiation Examination of HANARO Nuclear Mini-Element Fuel', KAERI/TR-1836, KAERI, 2001.
  6. B. O. Yoo, Y. H. Jung, Y. S. Choo, K. P. Hong., 'Post Irradiation Examination of Mini-Plate Nuclear Fuel', KAERI/TR-1896, KAERI, 2001.
  7. P. G. Luctuta, R. A. Verrall, H. J. Matzke and B. J. Palmer., 'Micro structural Features of SIMFUEL', J. Nucl. Mater. 178, 48(1991).
  8. Y. H. Jung, K. P. Hong, D. G. Park, S. B. Ahn., 'EPMA Analysis of non-coated UO2 pellet', KAERI/TR-2579, KAERI, 2003.