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
Abstract
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.