Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Preparation of an Intermediate and Particle Characteristics for HTGR Nuclear Fuel

고온가스로 핵연료 중간물질 제조와 분말특성

  • 정경채 (한국원자력연구소 입자연료개발부 피복입자 핵연료기술개발과제) ;
  • 김연구 (한국원자력연구소 입자연료개발부 피복입자 핵연료기술개발과제) ;
  • 오승철 (한국원자력연구소 입자연료개발부 피복입자 핵연료기술개발과제) ;
  • 이영우 (한국원자력연구소 입자연료개발부 피복입자 핵연료기술개발과제)
  • Published : 2007.02.28
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Abstract

In this study, first the ADU gel particle, an intermediate for final $UO_2$ kernel of a HTGR nuclear fuel, was prepared from sol-gel method using the broth solution which was made by mixing of the uranyl nitrate, poly vinyl alcohol and tetra-hydrofurfuryl alcohol. The prepared dried-ADU gel particles were converted to the $UO_2\;via\;UO_3$ from thermal treatment with the 4% $H_2$ atmosphere. The sizes of the spherical liquid droplets appeared $1900{\sim}2100{\mu}m$, and the harmony between the flow rate of the broth solution and the frequency and the amplitude of a vibrating system are important factors for the spherical ADU gel particles via the mono size spherical droplets. From the XRD and FT-IR analyses, the prepared ADU gel particles were judged to be a $UO_3{\cdot}xNH_3{\cdot}yH_2O$ form, and the most important factor during the thermal treatment of the dried-ADU gel particle must be avoided a rapidly heating rate in the range of $180{\sim}400^{\circ}C$, and the heating rate should be kept below $5^{\circ}C/min$.

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References

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