Publication: Neutronic evaluation of VVER fuel assembly with chemical spectral shift regulation
Дата
2024
Авторы
Ashraf, O.
El-Kholy, A. H.
Elzayat, T.
Abdalla, A. M.
Ashry, A. H.
Journal Title
Journal ISSN
Volume Title
Издатель
Аннотация
he performance of the spectral shift control (SSC) method is evaluated and compared to the conventional poison method in the VVER-1000 fuel assembly design. The SSC method can be implemented by gradually adjusting the ratio of heavy water to light water moderator (D2O/H2O) during the fuel cycle. In this study, the efficiency of using the SSC design with or without a thermal absorber (gadolinium) is investigated. We apply the SSC with both 12 burnable absorber rods containing 4.0 wt.% Gd2O3 (Case 1) and without Gd2O3 (Case 2). The neutronic calculations indicate that the discharge burnup is enhanced by 60% and the conversion ratio (CR) is increased by 64.4% at the beginning of the cycle (BOC) compared to the benchmark data. The breeding of Pu239 and Pu241 is extended to 33.7% and 29.5%, respectively, for the SSC design case (2), and better utilization of U-235 and U-238 has been achieved compared to BM.
Описание
Ключевые слова
Neutronics , fuel cycle , VVER , SERPENT-2 , Chemical spectral shift regulation
Цитирование
Ashraf O, El-Kholy AH, Elzayat T, Abdalla AM, Ashry AH (2024) Neutronic evaluation of VVER fuel assembly with chemical spectral shift regulation. Nuclear Energy and Technology 10(3): 153-160. https://doi.org/10.3897/nucet.10.125815