YENİDEN SİNTERLENEN UO2 PELLETLERİNİN MEKANİK ÖZELLİKLERİNİN MİKRO SERTLİK METODUYLA İNCELENMESİ

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

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