Temperature distribution in the PGAA system: Collimator, shutter, and filter in TRIGA Mark II reactor

Nuclear Analysis Pub Date : 2024-07-09 DOI:10.1016/j.nucana.2024.100120

Jamila Yousfi , Abdessamad Didi , Hamane Lemziouka , Lamiae Mrharrab , Hamid Amsil , Otman Jai , Hamid Bounouira , Khalid Larakil

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Abstract

This article examines the impact of temperature on the steel collimator cap and the primary beam shutter. These components will be used to implement the Prompt Gamma Activation Analysis (PGAA) technique in the Moroccan TRIGA Mark-II research reactor. The steel collimator plug is essential for forming the neutron beam, while the main role of the shutter is to stop the beam when the channel is inactive. This study analyzes the effect of temperature on the collimator and shutter system, particularly focusing on the variation in maximum temperature over a month of operation with 8-h cycles per day, the behavior of temperature over 24 h, the total heat flux as a function of the length of the experimental device, the temperature distribution in mild steel (E235) and 304L stainless steel materials, and the total displacement and strain gradient as a function of temperature. All calculations were performed using COMSOL Multiphysics simulation software, based on the finite element method.

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PGAA 系统中的温度分布：TRIGA Mark II 反应器中的准直器、快门和过滤器

本文研究了温度对钢制准直器盖和主光束快门的影响。这些部件将用于在摩洛哥 TRIGA Mark-II 研究反应堆中实施即时伽马活化分析（PGAA）技术。钢制准直器塞对于中子束的形成至关重要，而快门的主要作用是在通道处于非活动状态时阻止中子束。本研究分析了温度对准直器和快门系统的影响，尤其侧重于每天 8 小时周期运行一个月内最高温度的变化、24 小时内的温度行为、总热通量与实验装置长度的函数关系、低碳钢（E235）和 304L 不锈钢材料的温度分布以及总位移和应变梯度与温度的函数关系。所有计算均使用基于有限元法的 COMSOL Multiphysics 仿真软件进行。

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

Nuclear Analysis

CiteScore

1.70

自引率

0.00%

发文量