Publication: Thermal-and fast-spectrum molten salt reactors for minor actinides transmutation
Дата
2020
Авторы
Journal Title
Journal ISSN
Volume Title
Издатель
Аннотация
© 2020 Elsevier LtdThe long-lived Minor Actinides (MAs): 237Np, 241Am, 243Am, 243Cm, 244Cm, and 245Cm are responsible for the effective dose and heat generation after direct disposal in deep geological structures. Thus, long-lived MAs represent a major burden of nuclear power. The long-lived MAs have not yet been utilized as nuclear fuel. Therefore, the transmutation of these MAs is proposed as an alternative to the direct final disposal. In the current work, we analyze and compare the MAs transmutation performance in the critical Single-fluid Double-zone Thorium-based Molten Salt Reactor (SD-TMSR) and Small Molten Salt Fast Reactor (SMSFR). We study the variation of the Keff and core reactivity with different MAs loadings, the neutron spectrum shift, the time evolution of MAs and major nuclides inventories, and the transmutation ratio (TR). The TR of the long-lived MAs is calculated by using the SERPENT-2 Monte-Carlo code. The total neutron flux in the SD-TMSR and SMSFR can reach 4.1 × 1014 and 1.8 × 1015 n.cm−2.s−1, respectively. The results show that the SD-TMSR consumes about 50% of the generated Pu isotopes in the fuel salt, however, the SMSFR consumes about 86.5% of the generated Pu isotopes. During burnup, we apply the online reprocessing and refueling, therefore, the core is maintained critical and the total fuel mass in the core and blanket is almost constant. The results demonstrate that both reactors effectively transmute 237Np, 241Am,243Am, and 243Cm, meanwhile, the SMSFR has a higher TR than the SD-TMSR. The TR of the total MAs reaches 54.84% and 87.97% in the SD-TMSR and SMSFR, respectively.
Описание
Ключевые слова
Цитирование
Ashraf, O. Thermal-and fast-spectrum molten salt reactors for minor actinides transmutation / Ashraf, O., Tikhomirov, G.V. // Annals of Nuclear Energy. - 2020. - 148. - 10.1016/j.anucene.2020.107751
URI
https://www.doi.org/10.1016/j.anucene.2020.107751
https://www.scopus.com/record/display.uri?eid=2-s2.0-85089338413&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000568756900046
https://openrepository.mephi.ru/handle/123456789/22181
https://www.scopus.com/record/display.uri?eid=2-s2.0-85089338413&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000568756900046
https://openrepository.mephi.ru/handle/123456789/22181