Publication: Influence of different types of reflectors on 99 mo production in vvr-ts' targets
Дата
2020
Авторы
Kochnov, O. Yu.
Danilov, P. A.
Journal Title
Journal ISSN
Volume Title
Издатель
Аннотация
© 2020 Obninsk Institute for Nuclear Power Engineering, National Research Nuclear University 'MEPhI'. All rights reserved.The analysis of placement effectiveness for various types of reflectors in the core of the VVRts reactor for the production of 99Mo is carried out. Earlier, a calculation was made of the effect of only a beryllium reflector on the characteristics of the VVR ts reactor core such as reactivity margin, neutron flux in experimental channels, and accumulated activity of 99Mo. The calculations are based on the formed precision model of the core, which includes one experimental channel, where the targets for 99Mo production are irradiated. The model was created in the SCALE software package. The software package allows a fairly wide range of calculations to be carried out, from criticality assessment to the tasks of assessing the radiation situation. As a result of the computational analysis of the model, such characteristics were obtained as the effective multiplication factor, energy release in the targets for 99Mo generation, the neutron flux in the target raw material, and the amount of 99Mo generated after 120 hours of irradiation. The data were compared with the results of similar calculations of the parameters of the core of the VVR-ts reactor. Further, on the basis of reference literature, a list of widely used materials as a reflector or moderator in the reactor core was formed. Based on it, several models were formed and analyzed in which the water space at the periphery of the core was replaced with the researched materials. The calculation results showed that the maximum production of 99Mo is achieved when placing a beryllium reflector. Placement of other types of reflectors does not significantly increase production compared to an already placed water reflector.
Описание
Ключевые слова
Цитирование
Kochnov, O. Yu. Influence of different types of reflectors on 99 mo production in vvr-ts' targets / Yurievich, K.O., Anatolievich, D.P. // Izvestiya Wysshikh Uchebnykh Zawedeniy, Yadernaya Energetika. - 2020. - 1. - P. 49-57. - 10.26583/npe.2020.1.05