The influence of neutron irradiation on the microstructure of Al2O3, MgAl2O4, Y3Al5O12 and CeO2

Konings, R.J.M.; Bakker, K.; Boshoven, Jacobus; Conrad, R.; Hein, H.

doi:10.1016/s0022-3115(97)00355-3

Cited by 43 publications

(11 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These facts suggested that the swelling of spinel was mainly caused by fission fragment damage. It is known that the neutron resistance of corundum is inferior to that of spinel [5], and corundum becomes amorphous by fission damage. Berman et al reported that the fuel specimen irradiated at low temperature (about 560 K) showed a large swelling (about 30%) due to amorphization of the corundum phase [4].…”

Section: Swellingmentioning

confidence: 99%

“…However, it is known that the corundum matrix fuels show larger irradiation swelling [4]. On the other hand, the resistance of spinel to neutron irradiation is high [5], but that to fission fragment damage might not be sufficient. We have proposed dispersion of coarse particles of actinides-containing phase in spinel or corundum matrix [2,6], because it is preferable to localize fission fragments damage to a small region of the matrix to suppress the extensive swelling and the degradation of thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fuel performance evaluation of rock-like oxide fuels

Nitani

Kuramoto

Nakano

et al. 2008

Journal of Nuclear Materials

View full text Add to dashboard Cite

Section: Swellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fuel performance evaluation of rock-like oxide fuels

Nitani

Kuramoto

Nakano

et al. 2008

Journal of Nuclear Materials

View full text Add to dashboard Cite

“…The spinel or corundum phase immobilizes alkali and alkaline earth FPs, and improves thermal conductivity. The resistance of spinel to neutron irradiation is high (3) , but that to fission fragment damage might not be sufficient. For the improvement of swelling behavior, we have also proposed dispersion of coarse particles of actinides-containing phase in spinel or corundum matrix (2,4) .…”

Section: Introductionmentioning

confidence: 99%

Study of Rock-like Oxide Fuels under Irradiation

Nitani

Kuramoto

Nakano

et al. 2008

JPES

View full text Add to dashboard Cite

To evaluate the irradiation behavior of the rock-like oxide fuel, irradiation experiments were carried out. Three fuels were prepared; a single phase fuel of yttria-stabilized zirconia containing UO 2 (U-YSZ) and two types of particledispersed fuels of U-YSZ particles in spinel or corundum matrix. U-YSZ particle sizes were about 100 -200 µm. These fuels were irradiated in Japan Research Reactor No.3 for about 280 days. The burnups were about 11% FIMA. The fission gas release rate (FGR) was determined by puncture test and gas analysis. Corundum-based fuel showed extremely high FGR (88%). The irradiation behavior of spinel-based fuels in conditions avoiding the spinel decomposition was superior to corundum-based fuels, in view of their retention of FP gases. The temperature of U-YSZ single-phase fuel pellets was highest among the fuels, because of its low thermal conductivity. Nevertheless the U-YSZ single-phase fuel showed very low FGR (5%). Microstructure analyses of irradiated fuel pellets were carried out by ceramography and electron probe micro-analysis (EPMA). The restructuring of fuel pellet was not observed in the spinel-based fuel irradiated below 1400 K. Significant appearance changes were not also observed for corundum-based fuel, in the range of about 800 K to 1900 K, where the irradiation tests were carried out.

show abstract

“…The roles of spinel or corundum are to immobilize the alkali and alkaline earth nuclides and to improve thermal conductivity. The resistance of spinel to neutron irradiation is high [3], but may not be sufficient for fission fragments. For the improvement of swelling behavior, a particle-dispersed type fuel has been proposed [2,4].…”

Section: Introductionmentioning

confidence: 99%