YENİDEN SİNTERLENEN UO2 PELLETLERİNİN MEKANİK ÖZELLİKLERİNİN MİKRO SERTLİK METODUYLA İNCELENMESİ

Year 2019, Volume: 31 Issue: 1, 24 - 29, 26.06.2019

Sevgi Akbal Ahmet Yaylı Ferhan Can Esra Keşaf

Abstract

Bu çalışmanın amacı, mikro
sertlik testi kullanılarak re-sinter UO₂ yakıt peletlerinin mekanik özelliklerinin
incelenmesidir. UO₂ yakıt peletleri toz metalurjisi yolu ile
üretilmiştir. Ar +% 5 H₂ atmosferinde 4 saat sinterleme ile üretilen
UO₂ peletleri, termal kararlılık testi için Ar +% 5 H₂
atmosferinde 24 saat boyunca 1700 ⁰C'de yeniden sinterlemeye tabi
tutulmuştur. Termal kararlılık testinin UO₂ peletlerinin mekanik ve
mikroyapı özelliklerine etkisi tartışılmıştır.  

Keywords

UO2, yeniden sinterleme, termal kararlılık testi, mikrosertlik, mekanik özellikler, mikroyapı

INVESTIGATION OF MECHANICAL PROPERTIES RESINTERED UO2 PELLETS BY MİCRO HARDNESS METHOD

Abstract

Thermal stability test
(re-sintering test) of the nuclear fuel is one of the most important
characterization steps before loading to the reactor. The purpose of this study
is investigation of mechanical properties of re-sintered UO₂ pellets using micro hardness test method. UO₂ fuel pellets were produced by
powder metallurgical route.  UO₂
pellets sintered for 4 hours at Ar + 5% H₂ atmosphere were subjected
to re-sintering at 1700 ⁰ C for 24 hours in Ar + 5% H₂
atmosphere for thermal stability test. Re-sintering effects
on the mechanical properties and microstructure of UO₂ pellets were investigated.

Keywords

UO2, re-sintering, thermal stability test, micro hardness, mechanical properties, microstructure

References

• 1-Artir, R., Aybers, M., Akşit, A., & Akbal, S. (2006). İnvestigation of some mecanical properties of TiO2-doped UO2 fuel Pellets. Materials Characterization, 182-186.
• 2-Basov, V. V. (2009). Developing a Procedure for the Repeated Heat Treatment(Resintering) of UO2 Fuel Pellets. ISSN 1067-8212, Russian Journal of Non-Ferrous Metals, 50(4), 404–407.
• 3- bsi-DPC:12/30254328DC. (tarih yok). Resintering test for UO2, (U,Gd)O2 and (U,Pu)O2 pellets. Drasft BS ISO 15646(Draft BS ISO 15646).
• 4- German, R. M. (2007). Toz Metalurjisi ve Parçacıklı Malzeme İşlemleri (1 b.). (S. Sarıtaş, M. Türker, & N. Durlu, Çev.) Ankara: TTMD.
• 5- Hellwing, C., Pouchon, M., Restani, R., Ingold, F., & Bart, G. (2005). Fabrication and microstructure characterization of inert matrix fuel based on yttria stabilized zirconia. Journal of Nuclear Materials, 340, pp. 163-170.
• 6- ISO/CD15646. (2010, 12 06). Nuclear Energy-Fuel Technology Re-sintering Test for UO2, (U,Gd)O2 powder.
• 7- KANG, S.-J. L. (2004). Sintering. Elsevier.
• 8- Kim, H. S., Kim, S. H., Joung, Y. K., Lee, Y. W., & Sohn, D. S. (2002,). Evaluation of thermalstability for (U,Ce)O2 Pellet sintered in an oxidizing atmosphere. Characterisation and Qualıty Control of Nuclear fuels, p.473.
• 9-Paraschiv, M. C., Paraschiv, A., & Grecu, V. V. (2002). On the nuclear oxide fuel densification, swelling and thermal re-sintering. Journal of Nuclear Materials, 109-124.
• 10 Rhee, Y. W., Kim, D. J., Kim, J. H., Kim, K. S., Song, K. W., Yang, J. H., & Kang, K. W. (2006). Fabrication and Resintering of Annular UO2 Pellet. Transaction of the Korean Nuclear Society Autumn Meeting. Gyeongju, Korea.