고점성 모사용액 내 Carbon Black 입자의 분산특성 = Dispersion Characteristics of Carbon Black Particles in a High Viscous Simulated Solution

다국어 초록 (Multilingual Abstract)

An external gelation method in place of an internal gelation method applied to the fabrication process of an intermediated compound of Uranium Oxy-Carbide (UCO) kernel spheres for Very High Temperature Reactor (VHTR) fuel preparation is under development in Korea. For the preliminary experiments of the UCO kernel sphere preparation using an external gelation method, the carbon black dispersion experiments were carried out using a simulated broth solution. From the selection experiments of various kinds of carbon black through dispersion experiments in a viscous metal salt solution, Cabot G carbon black was selected owing to its dispersion stability, and the homogeneous dispersing state of carbon black particles in our system. For the effective dispersion of nano-size aggregated carbon black particles in a high viscous liquid, the carbon black particles in a metal salt solution were first de-aggregated with ultrasonic force. The mixed solution was then dispersed secondly by the use of the extremely high-speed agitation with a mechanical mixer of 6000 rpm after feeding the Poly Vinyl Alcohol (PVA) in the solution. This results in the broth solution with good stability and homogeneity alongside no further changes in physical properties.

참고문헌 (Reference)

1 C. W. Forsberg, 28 : 1073-, 2003

2 J. L. Collins, 42 : 121-, 1987

3 M. Wagner-Loffler, 35 : 392-, 1977

4 F. J. Homan, 35 : 428-, 1977

5 R. L. R. Lefevre, 35 : 263-, 1977

6 E. Lopez-Honorato, 238 : 3121-, 2008

7 P. Naefe, 42 : 163-, 1979

8 H. D. Ringel, 45 : 287-, 1979

9 V. N. Vaidya, 148 : 324-, 1987

10 R. D. Hunt, 92 : 909-, 2004

11 T. D. Gulden, 35 : 206-, 1977

12 H. Shaochang, 2012

13 J. A. Belmont, "US patent 6,042,643"

14 Colombian Chemicals Company, "Technical Brochure, Carbon Black Process and Basic Properties"

15 C. I. Contescu, "Selection and Characterization of Carbon Black and Surfactants for Development of Small Scale Uranium Oxicarbide Kernels" 2005

16 J. L. Collins, "Production of depleted UO2 Kernels for the Advanced Gas-cooled Reactor Program for Use in TRISO Coating Development" 2004

17 J. C. Kinsey, "NGNP Fuel Qualification White Paper" 2010

18 E. Brandau, "Microspheres of UO2, ThO2, and PuO2 for the High Temperature Reactor" 2002

19 J. W. Chang, "KAERI/AR-600/2001"

20 C. M. Barnes, "Fabrication Process and Product Quality Improvements in Advanced Gas Reactor UCO Kernels" 2008

21 T. B. Lindermer, "An Analysis of Chemical Failure of Coated UO2 and Other Oxide Fuel in the HTGR" 1974

22 Kyung-Chai Jeong, "ADU Compound Particle Preparation for HTGR Nuclear Fuel in Korea" 한국공업화학회 13 (13): 744-750, 2007