Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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A Basic Study on Spherical UO2 Kernel Preparation Using the Sol-Gel Method

Sol-Gel법을 이용한 구형 UO2 Kernel 제조에 관한 기초연구

  • Kim, Yeon-Ku (Nuclear Hydrogen Production Technology Development Team, KAERI) ;
  • Jeong, Kyung-Chai (Nuclear Hydrogen Production Technology Development Team, KAERI) ;
  • Oh, Seung-Chul (Nuclear Hydrogen Production Technology Development Team, KAERI) ;
  • Cho, Moon-Sung (Nuclear Hydrogen Production Technology Development Team, KAERI) ;
  • Na, Sang-Ho (Nuclear Hydrogen Production Technology Development Team, KAERI) ;
  • Lee, Young-Woo (Nuclear Hydrogen Production Technology Development Team, KAERI) ;
  • Chang, Jong-Wha (Nuclear Hydrogen Production Technology Development Team, KAERI)
  • 김연구 (한국원자력연구소 수소생산기술개발팀) ;
  • 정경채 (한국원자력연구소 수소생산기술개발팀) ;
  • 오승철 (한국원자력연구소 수소생산기술개발팀) ;
  • 조문성 (한국원자력연구소 수소생산기술개발팀) ;
  • 나상호 (한국원자력연구소 수소생산기술개발팀) ;
  • 이영우 (한국원자력연구소 수소생산기술개발팀) ;
  • 장종화 (한국원자력연구소 수소생산기술개발팀)
  • Published : 2005.09.01
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Abstract

HTGR (High Temperature Gas-Cooled Reactor) is highlighted to next generation power plant for producing the clean hydrogen gas. In this study, the spherical $UO_2$ kernel via $UO_3$ gel particles was prepared by the sol-gel process. Raw material of slightly Acid Deficient Uranyl Nitrate (ADUN) solution, which has pH = 1.10 and $[NO_3]/[U]$ mole ratio = 1.93, was obtained from dissolution of $U_3O_8$ powder with conc.-$HNO_3$. The surface of these spherical $UO_3$ gel particles, which was prepared from the broth solution, consisted of 1 M-uranium, 1 M-HMTA, and urea, were covered with the fine crystallite aggregates, and these particles were so hard that crushed well. But the other $UO_3$ gel particles prepared with the broth solution, consisted of 2 M-uranium, 2 M-HMTA, and urea, have soft surface characteristics and an amorphous phase. This type of $UO_3$ gel particles is some chance of doing possibility of high density from the compaction. The amorphous $UO_3$ gel particles was converted to $U_3O_8$ and then $UO_2$ by calcination at $600^{\circ}C\;in\;4\%\;-\;H_2\;+\;N2$ atmosphere.

Keywords

References

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