Skip to main content Accessibility help
×
Home

Photothermal microscopy applied to the characterization of UO2-Gd2O3 nuclear fuel pellets

  • Oscar Martínez (a1) (a2) (a3), Facundo Zaldivar (a4), Nélida Mingolo (a4) and Rodolfo Kempf (a5)

Abstract

The photothermal photodeflection technique is shown to provide information on the homogeneity of fuel pellets, pore distribution, clustering detection of pure urania and gadolinea and to provide a two-dimensional mapping of the thermal diffusivity correlated to the composition of the interdiffused Gadolinium and Uranium oxide. Histograms of the thermal diffusivity distribution become a reliable quantitative way of quantifying the degree of homogeneity and the width of the histogram can be used as a direct measure of the homogeneity. These quantitative measures of the homogeneity of the samples at microscopic levels provides a protocol that can be used as a reliable specification and quality control method for nuclear fuels, substituting with a single test a battery of expensive, time consuming and operator dependent techniques.

Copyright

References

Hide All
1. Durazzo, M., Oliveira, F.B.V., Urano de Carvalho, E.F., Riella, H.G., Phase studies in the UO2–Gd2O3 system, Journal of Nuclear Materials 400 (2010) 183188
2. TECDOC-844, International Atomic Energy Agency, Characteristics and Use of Urania-Gadolinia Fuels, ISSN 1011–4289, Viena, Austria, 1995.
3. Hälldahl, L., Eriksson, S., Characterization of homogeneity in (U, Gd)O2-pellets, Journal of Nuclear Materials 153 (1988) 6670.
4. Martínez, O.E., Balzarotti, F., Mingolo, N., Thermoreflectance and photodeflection combined for microscopic characterization of metallic surfaces, Applied Physics B 90 (2008) 6977.
5. Crossa Archiopoli, U., Mingolo, N., Martínez, O. E, Two-dimensional mapping of micro-hardness increase on surface treated steel determined by photothermal deflection microscopy, Surface and Coatings Technology, 205 (2011) 30873092.
6. Crossa Archiopoli, U., Mingolo, N., Martínez, O. E., Two-dimensional imaging of thermal diffusivity in metals by scanning photodeflection detection, Journal of Applied Physics 107 (2010) 023520–1 to 6.
7. Bincheng, Li, Roger, J. P., Pottier, L., and Fournier, D., Complete thermal characterization of film-on-substrate system by modulated thermoreflectance microscopy and multiparameter fitting, J. Appl. Phys. 86, (1999). 5314–1to3.
8. Fournier, D., Thermal-Wave Probing at Various Spatial Scales, MRS Bulletin 26, (2001) 465 -470
9. Rochais, D., Le Houëdec, H., Enguehard, F., Jumel, J., and Lepoutre, F., Microscale thermal characterization at temperatures up to 1000°C by photoreflectance microscopy. Application to the characterization of carbon fibres, J. Phys. D 38, (2005).14981503.
10. Rosencwaig, A., Opsal, J., Smith, W. L, and Willenborg, D. L, Detection of thermal waves through optical reflectance, Appl. Phys. Lett. 46, (1985). 10131015.
11. Rosencwaig, A., Opsal, J., and Willenborg, D. L., Thin-Film thickness measurements with thermal waves, Appl. Phys. Lett. 43, (1983). 166168.
12. Opsal, , Rosencwaig, A., Willenborg, D. L., Thermal-wave detection and thin-film thickness measurements with laser beam deflection, Appl. Optics 22 (1983) 31693176.
13. Singh, M. P., Thakur, C. S., Shalini, K., Banerjee, S., Bhat, N., Shivashankar, S. A.,. Structural, optical, and electrical characterization of gadolinium oxide films deposited by low-pressure metalorganic chemical vapor deposition, J. Appl. Phys. 96 (2004) 56315637
14. Fink, J.K., Thermophysical properties of uranium dioxide, Journal of Nuclear Materials 279 (2000) 118.
15. Amaya, M., Hirai, M., Sakurai, H., Ito, K., Sasaki, M., Nomata, T., Kamimura, K., Iwasaki, R., Thermal conductivities of irradiated UO2 and (U, Gd)O2 pellets, Journal of Nuclear Materials 300 (2002) 5764.

Keywords

Photothermal microscopy applied to the characterization of UO2-Gd2O3 nuclear fuel pellets

  • Oscar Martínez (a1) (a2) (a3), Facundo Zaldivar (a4), Nélida Mingolo (a4) and Rodolfo Kempf (a5)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed