Development of CAP process for fabrication of ThO2–UO2 fuels Part I: Fabrication and densification behaviour

Kutty, T.R.G.; Khan, K.B.; Somayajulu, P.S.; Sengupta, Arijit; Panakkal, J.P.; Kumar, Arun; Kamath, H.S.

doi:10.1016/j.jnucmat.2007.06.010

Cited by 28 publications

(16 citation statements)

References 23 publications

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“…Considering the heating conditions of 700 o C in air, the co-existence of U 3 O 8 is not surprising. The reduction treatment by H 2 was intentionally not performed in the present study because it has been shown that the presence of U 3 O 8 helps to enhance sintering [32]. The above results also imply that the ThO 2 -30%UO 2 and ThO 2 -50%UO 2 pellets could be fabricated using the powders obtained by the co-precipitation technique which yielded densities in the range of 96-98% T.D.…”

Section: Discussionmentioning

confidence: 79%

“…In the solid solution phase of UO 2 concentrations 15-78 mol%, the excess oxygen atoms are deduced to occupy the interstitial sites in the fluorite lattice. It has been reported that the solid state solubility of U 3 O 8 in ThO 2 is negligibly small [32,39,40]. Hund and Niessen [41] studied the phase relations in the ThO 2 -U 3 O 8 -O 2 system.…”

Section: Discussionmentioning

confidence: 99%

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Characterization of ThO2–UO2 pellets made by co-precipitation process

Kutty

Khan

Achuthan

et al. 2009

Journal of Nuclear Materials

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Section: Discussionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Characterization of ThO2–UO2 pellets made by co-precipitation process

Kutty

Khan

Achuthan

et al. 2009

Journal of Nuclear Materials

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“…Coated Agglomerate Pelletization (CAP) [51][52][53] and Powder oxide Pelletization (POP) and co precipitation route have been developed at BARC, Mumbai [54].…”

Section: Fabrication Processingmentioning

confidence: 99%

ThO<sub>2</sub> and (U,Th)O<sub>2</sub> processing—A review

Balakrishna¹

2012

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India is one of the few countries committed to expansion of nuclear power. In view of the abundance of thorium relative to uranium, thorium cycle is under serious development and implementation. Both ThO 2 and (U,Th)O 2 are used. Fine powders of the same are mostly prepared through the aqueous chemical route, pressed and sintered. Extrusion and hot impact densification are also being used. Sol-gel method and other alternatives are also being pursued with the advantage of automation and remote operation. Relevant papers on the thorium cycle with emphasis on processing methods and related aspects are reviewed here.

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“…For the fabrication of ThO 2 -4%UO 2 pellets (4 g UO 2 in 96 g ThO 2 ) using the CAP process, ThO 2 granules and U 3 O 8 powders were used as the starting materials. It was found that the ThO 2 -4%UO 2 pellets developed by the CAP process showed a 'rock in sand' structure with small grains in the center of the granules and large grains along the periphery [1,2]. However, no delineation of granules could be found.…”

Section: Introductionmentioning

confidence: 95%

“…Recently, a new fabrication procedure using Coated Agglomerate Pelletization (CAP) was developed by Bhabha Atomic Research Centre (BARC) for the fabrication of ThO 2 -233 UO 2 pellets [1,2]. This process is developed to replace the conventional powder metallurgy process that consists of direct blending of 233 UO 2 and ThO 2 powders [3].…”

Section: Introductionmentioning

confidence: 99%