Multi-physics evaluation of the steady-state operation of an Aqueous Homogeneous Reactor for producing Mo-99 for the Brazilian demand

IF 0.9 Q4 THERMODYNAMICS

International Journal of Thermodynamics Pub Date : 2021-02-28 DOI:10.5541/IJOT.790728

D. M. Pérez, D. Pérez, Liván Hernández Pardo, D. Lorenzo, C. D. O. Lira

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引用次数: 1

Abstract

The studies summarized in this paper aims to predict the steady state operation of a low-enriched uranium fuel ARGUS type aqueous homogeneous reactor for producing 99Mo to meet the domestic demand of Brazil through a coupled multi-physics (Neutronics + Thermal-hydraulics) evaluation. The coupled multi-physics evaluation included aspects related to the neutronic behavior such as fission induced energy deposition profile, medical isotopes production; and the thermal-hydraulic behavior such as temperature, velocities and gas volume fraction profiles. The methodology followed for the multi-physics and multi-scale coupling of the neutronic and thermal-hydraulic codes (MCNP + ANSYS-CFX), discussed in detail in this paper, represent one of the main outcomes of the current study. The methodology was tested for two different operating configurations of the ARGUS reactor, the original high-enriched uranium configuration used since 1981, and the new low-enriched uranium configuration after the conversion process during 2012-2014. The calculations carried out showed that the reactor, in the studied configuration, is able to produce 246.5 six days Curie of 99Mo in operation cycles of five days. Which is equivalent to more than a third of the estimated Brazilian demand for 2025.

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为满足巴西需求而生产Mo-99的含水均质反应器稳态运行的多物理场评价

本文总结的研究旨在通过耦合多物理（Neutronics+Thermal hydroulics）评估来预测低浓缩铀燃料ARGUS型水性均质反应堆的稳态运行，以生产99Mo，以满足巴西国内的需求。耦合多物理评估包括与中子行为相关的方面，如裂变诱导的能量沉积剖面、医用同位素生产；以及诸如温度、速度和气体体积分数分布的热工水力学行为。本文详细讨论了中子和热工水力学代码（MCNP+ANSYS-CFX）的多物理和多尺度耦合所遵循的方法，代表了当前研究的主要成果之一。该方法针对ARGUS反应堆的两种不同运行配置进行了测试，即1981年以来使用的原始高浓缩铀配置和2012-2014年转换过程后的新低浓缩铀配置。计算表明，在所研究的配置中，该反应器能够在五天的运行周期内产生246.5个六天的99Mo居里。这相当于巴西2025年预计需求的三分之一以上。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Thermodynamics THERMODYNAMICS-

CiteScore

1.50

自引率

12.50%

发文量

期刊介绍： The purpose and scope of the International Journal of Thermodynamics is · to provide a forum for the publication of original theoretical and applied work in the field of thermodynamics as it relates to systems, states, processes, and both non-equilibrium and equilibrium phenomena at all temporal and spatial scales. · to provide a multidisciplinary and international platform for the dissemination to academia and industry of both scientific and engineering contributions, which touch upon a broad class of disciplines that are foundationally linked to thermodynamics and the methods and analyses derived there from. · to assess how both the first and particularly the second laws of thermodynamics touch upon these disciplines. · to highlight innovative & pioneer research in the field of thermodynamics in the following subjects (but not limited to the following, novel research in new areas are strongly suggested): o Entropy in thermodynamics and information theory. o Thermodynamics in process intensification. o Biothermodynamics (topics such as self-organization far from equilibrium etc.) o Thermodynamics of nonadditive systems. o Nonequilibrium thermal complex systems. o Sustainable design and thermodynamics. o Engineering thermodynamics. o Energy.