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http://dx.doi.org/10.4191/KCERS.2008.45.1.725

Study on an Intermediate Compound Preparation for a HTGR Nuclear Fuel  

Kim, Yeon-Ku (HTGR Nuclear Fuel Technology Development Division, KAERI)
Suhr, Dong-Soo (Department of Material Engineering, Chungnam National University)
Jeong, Kyung-Chai (HTGR Nuclear Fuel Technology Development Division, KAERI)
Oh, Seung-Chul (HTGR Nuclear Fuel Technology Development Division, KAERI)
Cho, Moon-Sung (HTGR Nuclear Fuel Technology Development Division, KAERI)
Publication Information
Journal of the Korean Ceramic Society / v.45, no.11, 2008 , pp. 725-733 More about this Journal
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.
Keywords
$UO_3$ kernel; Sol-gel; Liquid droplet; Vibration;
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