UN燃料耐腐蚀性能及掺杂改性的研究进展

王明江, 王晓敏, 肖红星

Research Progress on Corrosion Resistance of UN Fuel and Its Doping Modification

WANG Mingjiang, WANG Xiaomin, XIAO Hongxing

表1 制备工艺对UN燃料芯块特性的影响

Table 1 Influence of preparation process on the characteristics of UN fuel pellets

Preparation process Purity Density Grain size Corrosion resistance HDN High - - Higher purity is beneficial for enhancing corrosion resistance CTR-N High carbon and oxygen content - - Both carbon and oxygen impurities will reduce the corrosion resistance HP - A higher sintering temperature may cause the UN to decom-pose and result in a decrease in density Related to the ball-milling method and the ball-mill-ing time; relatively smaller Affected by density and grain size, the influence of other microstructures still needs to be studied SPS - It is conducive to increasing density Related to the ball-milling method and the ball-mill-ing time; relatively larger Higher density and smaller grain size are conducive to enhancing corrosion resistance. the influence of other microstructures still needs to be explored