On the oxidation state of UO2 nuclear fuel at a burn-up of around 100MWd/kgHM

Walker, C.T.; Rondinella, V.V.; Papaioannou, D.; Winckel, Stefaan Van; Goll, W.; Manzel, R.

doi:10.1016/j.jnucmat.2005.05.010

Cited by 56 publications

(92 citation statements)

References 33 publications

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“…From the overall PWR data (figure 3), the initiation threshold determined from EPMA measurements by Lassmann and Walker [42] was ranging from 60 to 75 GWd/MtU. However, the determination of the local burn-up in this case is not so accurate as in the HBRP samples.…”

Section: Burn-up and Temperature Threshold (Local Values)mentioning

confidence: 93%

Discussion About HBS Transformation in High Burn-Up Fuels

Baron¹,

Kinoshita²,

Thévenin³

et al. 2009

Nuclear Engineering and Technology

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Section: Burn-up and Temperature Threshold (Local Values)mentioning

confidence: 93%

Discussion About HBS Transformation in High Burn-Up Fuels

Baron¹,

Kinoshita²,

Thévenin³

et al. 2009

Nuclear Engineering and Technology

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“…Lattice parameter measurements using micro-XRD have shown that the lattice strain is highest at the radial position where nucleation of the high burn-up structure begins as would be expected if the transformation of the microstructure is initiated by radiation damage (see figure 4 of ref. [28]). EPMA has revealed that when re-crystallisation occurs nearly all the fission gas is swept out of the fuel matrix [21].…”

Section: Re-crystallisation Of Nuclear Fuel At High Burn-upmentioning

confidence: 99%

Microbeam analysis of irradiated nuclear fuel

Walker¹,

Stephan²,

Pöml³

et al. 2012

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Microbeam analysis is widely used in the nuclear power industry. It is used to characterise the as-fabricated fuel, for routine post-irradiated examination and for research into the mechanisms of phenomena that limit the energy production of the fuel. The techniques most commonly used are wavelength-dispersive electron probe microanalysis, scanning electron microscopy and secondary ion mass spectrometry. Other microbeam analysis techniques that have been successfully applied to irradiated nuclear fuel are transmission and replica electron microscopy, X-ray fluorescence and micro X.-ray diffraction. Specific examples illustrating the past and present use of microbeam analysis in nuclear research establishments are presented with emphasis on the unique results they provide. As an aid to understanding, some basic facts about nuclear fuel rods and their irradiation are first given. This is followed by a description of features that set apart the microbeam analysis of high radioactive materials from standard practice.

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“…It can be noted that even calculation of the oxygen potential with a complete thermochemical database should also be regarded as approximate given the incomplete knowledge of FP behaviour in the UO 2 kernel. Additionally, the burn-up dependence of the oxygen potential in irradiated fuels remains today an intensely debated point in the literature (see [13,14]). For these reasons, here, the thermodynamic calculations are presented as a function of oxygen potential.…”

Section: Oxygen Potential and Particle Pressurizationmentioning

confidence: 99%

“…Recent measurements [13] have indicated that this oxygenpotential range between À325 and À350 kJ mol À1 can be potentially reached for a burn-up of 9% FIMA in PWR UO 2 fuel at 1273 K. For such low-enriched fuel, the burn-up accumulated after the third irradiation cycle mainly results from the fission of 239 Pu which is known to be a more oxidising process than the fission of 235 U. For the TRISO fuel kernel, the uranium fission is assumed to be preponderant during a longer time considering the higher initial enrichment.…”

Section: Oxygen Potential and Particle Pressurizationmentioning

confidence: 99%