Thermophysical Properties of Mixtures of Thorium and Uranium Nitride

Autor:	J.T. White, S. Newman, A. J. Fallgren, S. Parker
Rok vydání:	2021
Předmět:	Work (thermodynamics) Materials science General Engineering Thorium chemistry.chemical_element Thermodynamics Nitride Miscibility Modeling and simulation chemistry.chemical_compound Heat pipe Lattice constant chemistry General Materials Science Uranium nitride
Zdroj:	JOM. 73:3564-3575
ISSN:	1543-1851 1047-4838
Popis:	The miscibility, lattice parameter, and thermophysical properties of (Th0.2U0.8)N and (Th0.5U0.5)N have been investigated. It is shown that additions of thorium nitride (ThN) to uranium nitride (UN) increases the thermophysical performance of the mixed nitride fuel form in comparison to reference UN. In the more dilute limit, additions of ThN serve as a burnable neutronic poison and reduces the change in keff over the lifecycle of the fuel. At higher concentrations, additions of ThN serve as a significant fertile source of 233U. Where appropriate, comparisons to previous work on UN + PuN mixtures are made, as this is a comparable fuel form for potential fast reactor concepts, and a suitable point of contrast in the possible design space afforded by mixed (ThxU1 − x)N fuel forms. The data from this work are the input parameters for finite element modeling of the temperature distribution in a compact reactor. The results of modeling and simulation of this core design are shown for the case of steady-state operation and during double, adjacent heat pipe failure.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::267743759047c06c41f4d1361208c67d https://doi.org/10.1007/s11837-021-04844-2 Zobrazit plný text záznamu Full text from SpringerLink