Development of analytical equations for void fraction in biphasic systems using gamma radiation and MCNP6 code

IF 1.6 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Applied Radiation and Isotopes Pub Date : 2024-10-10 DOI:10.1016/j.apradiso.2024.111549

W.L. Salgado, R.S.F. Dam, C.M. Salgado

引用次数: 0

Abstract

This study presents the development of mathematical equations for calculating void fractions in pipes using gamma densitometry. A traditional measurement setup, consisting of a¹³⁷Cs point source and a NaI(Tl) scintillator detector, was simulated using the Monte Carlo method via the MCNP6 code. To validate the proposed equations, water-gas biphasic models were simulated in tubes with square and cylindrical cross-sections, varying diameters, and radiation sources (²⁴¹Am, ¹³⁷Cs, ⁶⁰Co) through gamma-ray transmission. A comparative analysis with existing equations from the literature was conducted. The void fractions, determined from the transmission photopeak, were in close agreement with the actual values. The proposed equations demonstrated a maximum mean relative error of 0.21% for cylindrical tubes in stratified and annular flow regimes.

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利用伽马辐射和 MCNP6 代码开发双相系统中空隙率的分析方程

本研究提出了利用伽马密度计计算管道中空隙率的数学方程。通过 MCNP6 代码，使用蒙特卡罗方法模拟了由 137Cs 点源和 NaI(Tl) 闪烁探测器组成的传统测量装置。为了验证所提出的方程，在横截面为方形和圆柱形、直径不等的管子中，通过伽马射线透射模拟了水气双相模型和辐射源（241Am、137Cs、60Co）。与文献中的现有方程进行了比较分析。通过透射光谱测定的空隙率与实际值非常接近。对于分层和环流状态下的圆柱形管道，所提出的方程显示的最大平均相对误差为 0.21%。

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

Applied Radiation and Isotopes 工程技术-核科学技术

CiteScore

3.00

自引率

12.50%

发文量

406

审稿时长

13.5 months

期刊介绍： Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.