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J. Korean Ceram. Soc. > Volume 45(11); 2008 > Article
Journal of the Korean Ceramic Society 2008;45(11): 725.
doi: https://doi.org/10.4191/kcers.2008.45.1.725
고온가스로용 핵연료 중간화합물 제조에 대한 연구
김연구, 서동수1, 정경채, 오승철, 조문성
한국원자력연구원 피복입자 핵연료기술개발과제
1충남대학교 재료공학과
Study on an Intermediate Compound Preparation for a HTGR Nuclear Fuel
Yeon-Ku Kim, Dong-Soo Suhr1, Kyung-Chai Jeong, Seung-Chul Oh, Moon-Sung Cho
HTGR Nuclear Fuel Technology Development Division, KAERI
1Department of Material Engineering, Chungnam National University
ABSTRACT
In this study the preparation method of the spherical ADU droplets, intermediate compound of a HTGR nuclear fuel, was detailed-reviewed and then, the characteristics on an ageing and a washing steps among the wet process and the thermal treatment process on the died-ADU${rightarrow}UO_3$ conversion with the high temperature furnaces were studied. The key parameters for spherical droplets forming are a precise control of feed rate and a suitable viscosity value selection of a broth solution. Also, a harmony of vibrating frequency and amplitude of a vibration dropping system are important factor. In our case, an uranium concentration is $0.5{sim}0.7mol/l$, viscosity is $50{sim}80$ centi-Poise, vibration frequency is about 100Hz. In thermal treatment for no crack spherical $UO_3$ particle, the heating rate in the calcination must be operated below $2^{circ}C$/min, in air atmosphere.
Key words: $UO_3$ kernel, Sol-gel, Liquid droplet, Vibration
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