http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
HIGH BURNUP CHANGES IN UO₂ FUELS IRRADIATED UP TO 83 GWD/T IN M5® CLADDINGS
J. NOIROT,I. AUBRUN,L. DESGRANGES,K. HANIFI,J. LAMONTAGNE,B. PASQUET,C. VALOT,P. BLANPAIN,H. COGNON 한국원자력학회 2009 Nuclear Engineering and Technology Vol.41 No.2
Since the 90’s, EDF and AREVA-NP have irradiated, up to very high burnups, lead assemblies housing M5® cladded fuels. Post-irradiation examination of high burnup UO₂ pellets show an increase in the fission-gas release rate, an increase in fuel swelling, and formation of fission-gas bubbles throughout the pellets. Xenon abundances were quantified, and phenomena leading to this bubble formation were identified. All examinations provided valuable data on the complex state of the fuel during irradiation. They show the good behavior of these fuels, exhibiting various microstructures at very high burnups, none of which is likely to lead to problems during irradiation
HIGH BURNUP CHANGES IN UO<sub>2</sub> FUELS IRRADIATED UP TO 83 GWD/T IN M5<sup>(R)</sup> CLADDINGS
Noirot, J.,Aubrun, I.,Desgranges, L.,Hanifi, K.,Lamontagne, J.,Pasquet, B.,Valot, C.,Blanpain, P.,Cognon, H. Korean Nuclear Society 2009 Nuclear Engineering and Technology Vol.41 No.2
Since the 90's, EDF and AREVA-NP have irradiated, up to very high burnups, lead assemblies housing $M5^{(R)}$ cladded fuels. Post-irradiation examination of high burnup $UO_2$ pellets show an increase in the fission-gas release rate, an increase in fuel swelling, and formation of fission-gas bubbles throughout the pellets. Xenon abundances were quantified, and phenomena leading to this bubble formation were identified. All examinations provided valuable data on the complex state of the fuel during irradiation. They show the good behavior of these fuels, exhibiting various microstructures at very high burnups, none of which is likely to lead to problems during irradiation.
J. Noirot,I. Zacharie-Aubrun,T. Blay 한국원자력학회 2018 Nuclear Engineering and Technology Vol.50 No.2
Focused ion beamescanning electron microscope and electron backscattered diffraction examinationswere conducted in the center of a 73 GWd/tU UO2 fuel. They showed the formation of subdomains withinthe initial grains. The local crystal orientations in these domains were close to that of the original grain. Most of the fission gas bubbles were located on the boundaries. Their shapes were far from spherical andfar from lenticular. No interlinked bubble network was found. These observations shed light on previousunexplained observations. They plead for a revision of the classical description of fission gas releasemechanisms for the center of high burn-up UO2. Yet, complementary detailed observations are needed tobetter understand the mechanisms involved