Fabrication of Monolithic UAl2 Pellet for High-Density Nuclear Fuel


Article Preview

Uranium powder, which can be obtained by the atomization process, was used to fabricate UAl2 by using powder metallurgy technology. Uranium powder and Al powder were blended, extruded, and annealed into a UAl2 rod in a mold. Sound UAl2 rods were fabricated by the powder metallurgical process. The relative density of the UAl2 pellet formed by an annealing was at about 94%. The density increased with higher constraints on the mold and a smaller particle size of the uranium powder. A coarse uranium powder of about 80 μm in average diameter represented the remaining un-reacted uranium phase. On the other hand, a fine uranium powder of about 50 μm in average diameter could achieve a pure UAl2 phase without a uranium phase. The analysis by an X-ray diffraction pattern confirmed that the annealed specimens had interacted to form a UAl2 phase. Conclusively, the sintered UAl2 pellet is expected to be useful in developing advanced fuels.



Advanced Materials Research (Volumes 26-28)

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee




K. H. Kim et al., "Fabrication of Monolithic UAl2 Pellet for High-Density Nuclear Fuel", Advanced Materials Research, Vols. 26-28, pp. 925-928, 2007

Online since:

October 2007




[1] S. Nazarė , G. Ondracek and F. Thümmler: J. of Nuclear Materials, Vol. 56 (1975), pp.251-259.

[2] L.F. Mondolof, in : Extended Life Aluminide Fuel Final Rep., Butterworth, London (1976), in press.

[3] G.L. Hofman : Nuclear technology, Vol. 77 (1987), p. pp.110-115.

[4] G.L. Hofman, J.L. Snelgrove : Nuclear Materials, Vol. 10A, , Part I, New York (1994).

[5] K. H. Kim, et. al.: J. of Nuclear Materials, Vol. 245 (1997), pp.179-184.

[6] K. H. Kim, et. al.: J. of Nuclear Science and Technology, Vol. 34(1997), pp.1127-1132.

[7] M. K. Meyer, et. al. : J. Nuclear Materials, Vol. 304 (2002), pp.221-236.

[8] C.K. Kim, et al. : RRFM 2004, Munchen, Germany. � � � �� � � ��� � 20 40 60 80 100 0 50 100 150 200 250 300 350 Intensity (cps) Diffraction Angle (2 theta) UAlUAlUAlUAl2222.