Effects of TiO2 on the sintering densification of UO2–Gd2O3 burnable poison fuel. Issue 8 (September 2015)

• Record Type: Journal Article
• Authors: Wang, Yunfang; Fan, Caimei; Wang, Hui; Wang, Fu; Xu, Jiangming; Duan, Panpan; Zhang, Yong
• Is Part Of: Ceramics international. Volume 41:Issue 8(2015)
• Page Start: 10185
• Page End: 10191
• Publication Date: 2015-09
• Subjects: Advanced nuclear fuel -- Burnable poison -- Sintering densification -- Co-precipitation reaction method -- High burn-up; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.04.124
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: TiO2 -doped UO2 –Gd2 O3 (8% by wt Gd2 O3 ) burnable poison fuel was prepared using a co-precipitation reaction method. Doping of UO2 –Gd2 O3 with 0.05 wt% TiO2 significantly improves the sintered density, grain size, and bending strength of fuel pellets resulting from sintering at 1600 °C under hydrogen for 4 h. Additionally, homogeneous solid solutions were successfully formed without precipitation of TiO2 and/or Gd2 O3 . TiO2 doping in UO2 –Gd2 O3 fuel pellets accelerates their thermally activated material transport resulting in a decrease in onset temperature and the temperature of maximum densification rate.