New fuel of the third-plus-generation with modified JA-profile enrichment for VVER-440. Perspective 15 monthly fuel cycles for VVER-440.
28th Symposium of AER on VVER Reactor Physics and Reactor Safety (2018, Olomouc, Czechia)
Fuel management issues
Zh. Liventseva, A. Gagarinsky (NRC Kurchatov Institute)
This paper is devoted to the presentation the new third-plus-generation fuel modified JA-profiling enrichment with 6 U-Gd fuel rods for VVER-440. The optimization of profiling enrichment in the cross-section of the fuel bundle RK3+ fuel assembly with 6 U-GD fuel rods was done in order to reduce the non-uniformity of rod power. Since 2017 year and in this article we have been showing, that changing the location of the U-Gd fuel rods in accordance with the JA- profiling fuel enrichment makes it possible to reduce the non-uniformity of rod power in VVER-440 fuel cycles. The new enrichment of RK3+ fuel allows to develop perspective 15-th month VVER-440 fuel cycles, satisfying modern requirements and to provide a work at the increased thermal power. The types of enrichment profiling and main characteristics fuel cycles are presented in this article.