Some observations on the PuZr0 system

Mardon, P.G.; Hodkin, D.J.; Dalton, James S.

doi:10.1016/0022-3115(69)90148-2

Cited by 19 publications

(4 citation statements)

References 7 publications

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“…The materials listed in the table are of relatively better properties: their melting points are high with reasonably low vapor pressures, compatibility with their environmental species is comparatively good and their thermal conductivities are high with the exception of ZrO 2 and CeO 2 . It is also to be noted that the ZrO 2 -PuO 2 system is not completely miscible due to the tetragonal and monoclinic structures of ZrO 2 in the temperature ranges of 1,200-2,300 o C and below 1,200 o C respectively [8]. These transitions can be overcome by stabilization with CaO or Y 2 O 3 to form a stable cubic phase.…”

Section: Physico-chemical Propertiesmentioning

confidence: 96%

Inert matrix fuel — A new challenge for material technology in the nuclear fuel cycle

et al. 2001

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An innovative nuclear fuel concept for the utilization as energy resources and for the incineration of excess Pu arisings as well as for an effective transmutation of minor actinides (MA's; Am, Np and Cm) is discussed from the aspect of material technology. Stabilized cubic phase ZrO 2 and other potential candidate materials for the Inert Matrix are compared in terms of the material properties and other behaviors such as the behavior against irradiation with the relevant information currently available. Strategies for the use of the Inert Matrix Fuel concept in various countries are discussed and compared for their options in nuclear fuel cycle technology.

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Section: Physico-chemical Propertiesmentioning

confidence: 96%

Inert matrix fuel — A new challenge for material technology in the nuclear fuel cycle

et al. 2001

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“…The columnar grains surrounding the PuO 2 -rich inclusion were believed to be formed due to significant variation of ZrO 2 solubility in PuO 2 with temperature. Examination of the PuO 2 -rich end of the PuO 2 -ZrO 2 phase diagram [11] revealed that the solubility of ZrO 2 in PuO 2 increases from 20 to 60 mol% with the increase of temperature from 1473 to 1973 K. Therefore, this variation in solubility caused diffusion of ZrO 2 into the PuO 2 particle during the furnace ramp-up and sintering, and rejection of ZrO 2 by PuO 2 -rich particle during furnace ramp-down. Rejection of ZrO 2 by the PuO 2 -rich particle caused particle densification which led to the formation of a gap between the particle and the matrix observed in Fig.…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

Fabrication and characterization of dual phase magnesia–zirconia ceramics doped with plutonia

Medvedev

Jue

Frank

et al. 2006

Journal of Nuclear Materials

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Dual phase magnesia-zirconia ceramics doped with plutonia are being studied as an inert matrix fuel (IMF) for light water reactors. The motivation of this work is to develop an IMF with a thermal conductivity superior to that of the fuels based on yttria stabilized zirconia. The concept uses the MgO phase as an efficient heat conductor to increase thermal conductivity of the composite. In this paper ceramic fabrication and characterization by scanning electron microscopy, energy and wavelength dispersive xray spectroscopy is discussed. Characterization shows that the ceramics consist of the two-phase matrix and PuO 2 -rich inclusions. The matrix is comprised of pure MgO phase and MgO-ZrO 2 -PuO 2 solid solution. The PuO 2 -rich inclusion contained dissolved MgO and ZrO 2 .

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“…The columnar grains surrounding the PuO 2 -rich inclusion were believed to be formed due to significant variation of ZrO 2 solubility in PuO 2 with temperature. Examination of the PuO 2 -rich end of the PuO 2 -ZrO 2 phase diagram [25] revealed that the solubility of ZrO 2 in PuO 2 increases from 20 to 60 mol% with the increase of temperature from 1200 o C to 1700 o C. Therefore, this variation in solubility caused diffusion of ZrO 2 into the PuO 2 particle during the furnace ramp-up and sintering, and rejection of ZrO 2 by PuO 2 -rich particle during furnace ramp-down. Rejection of ZrO 2 by the PuO 2 -rich particle caused particle densification which led to the formation of a gap between the particle and the matrix observed in Figure 10b.…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

AECL/US INERI - Development of Inert Matrix Fuels for Plutonium and Minor Actinide Management in Power Reactors -- Fuel Requirements and Down-Select Report

Carmack¹,

Lee²,

Medvedev³

et al. 2005

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Some observations on the PuZr0 system

Cited by 19 publications

References 7 publications

Inert matrix fuel — A new challenge for material technology in the nuclear fuel cycle

Inert matrix fuel — A new challenge for material technology in the nuclear fuel cycle

Fabrication and characterization of dual phase magnesia–zirconia ceramics doped with plutonia

AECL/US INERI - Development of Inert Matrix Fuels for Plutonium and Minor Actinide Management in Power Reactors -- Fuel Requirements and Down-Select Report

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