کمال حداد
دانشکده مهندسی مکانیک، دانشگاه شیراز، شیراز، ایران
[ 1 ] - مدل سازی و تحلیل عددی جریان در بستر‌های پر شده از گوی برای خنک سازی قلب راکتور گداخت
یکی از چالش های مهم در راکتورهای گداخت هسته‌ای برداشت حرارت به کمک کانال‌های انتقال حرارت تعبیه شده می‌باشد. این موضوع سبب گردیده تا از روش‌های مختلفی جهت بهبود خنک‌سازی راکتور استفاده شود. یکی از روش‌های مورد مطالعه در این بخش، استفاده از مغشوش‌کردن هر چه بیشتر میدان جریان به کمک کانال پر شده از گوی می‌باشد. در کار حاضر شبیه‌سازی و تحلیل عددی انتقال حرارت در کانال‌های پر شده از گوی، به عنوان ر...
[ 2 ] - بسته نرم افزار آموزشی SIMTRANS برای شبیه سازی راکتورهای هسته ای در حالت های گذرا و پایدار
به منظور شبیه سازی حلقه اول نیروگاه های نوع آب سبک تحت فشار(PLWR ) بسته نرم افزای به نام SIMTRANS طراحی و پیاده سازی شد. این نرم افزار با اهداف کاربرد آموزشی به کاربرانی که در زمینه مهندسی هسته ای فعالیت دارند این امکان را می دهد که رفتار و پاسخ سیستم های راکتور نوع System 80 را که تحت 5 نوع حادثه قرار می گیرد، شبیه سازی و بررسی کنند. حوادثی از قبیل از دست رفتن آب تغذیه، از دست رفتن آب خنک کنند...
[ 3 ] - VOC level control by ventilation improvement of Flexography printing room using CFD modeling
Using Computational Fluid Dynamics (CFD) technique, the dispersion contours and the exposure rate of Flexographic printing workers to VOCs in a printing department is evaluated. Firstly, VOCs distribution is determined in the printing room due to the existing ventilation system. Through next steps, 4 scenarios for lowering VOCs concentration and its exposure rate to workers are analyzed. Concen...
[ 4 ] - Application of characteristic X-rays to measure linear attenuation coefficient of nano-composites used in shielding
Using of X-rays in different industries and especially in medical application is increasing. In this regard, designing of light and efficient protective material based on polymeric nanocomposites and precise study of the effect of adding nanoparticles with different sizes on the X-ray attenuation is necessary. In this study the epoxy nanocomposites with different percentages of copper oxide nan...
[ 5 ] - Investigating the trajectory and amount of radioactive materials effluence in the atmosphere due to operation of Fars proposed research reactor
In this study, the trajectory and the concentration of radioactive nuclei in the atmosphere resulting from the Fars proposed research reactor innormal operation condition have been investigated. Since the reactor is in the conceptual design stage, so we use the characteristics of the Tehran research reactor, which is very similar to this reactor. Simulations were carried out for a one-year peri...
[ 6 ] - Experimental comparison of thermal neutron absorption cross section in nano and micro particles
The neutron collision cross-section is important in neutron use for a specific job, such as neutron therapy or even in nuclear reactors. In calculating computational codes such as MCNP, only information from the neutron-to-mass collision information contained in the computational code library is used, in the case of nanoscale particles in contrast to the mass of materials and / or particulate m...
[ 7 ] - Accuracy Evaluation of Oncentraâ„¢ TPS in HDR Brachytherapy of Nasopharynx Cancer Using EGSnrc Monte Carlo Code
Background: HDR brachytherapy is one of the commonest methods of nasopharyngeal cancer treatment. In this method, depending on how advanced one tumor is, 2 to 6 Gy dose as intracavitary brachytherapy is prescribed. Due to high dose rate and tumor location, accuracy evaluation of treatment planning system (TPS) is particularly important. Common methods used in TPS dosimetry are based on computat...
[ 8 ] - Evaluation of MLC Thickness and Composite Effects on Collimation Parameters using EGSnrc and IAEA Phase Space Data
Background: Recently, multileaf collimators (MLC) have become an important part of any LINAC collimation system because they reduce the treatment planning time and improve the conformity. Important factors that affect MLCs collimation performance are leaves material composition and their thickness.Objective: In this study, we investigate main dosimetric parameters of a typical MLC includi...
[ 9 ] - Assessment of Different Training Methods in an Artificial Neural Network to Calculate 2D Dose Distribution in Radiotherapy
Introduction: Treatment planning is the most important part of treatment. One of the important entries into treatment planning systems is the beam dose distribution data which maybe typically measured or calculated in a long time. This study aimed at shortening the time of dose calculations using artificial neural network (ANN) and finding the best method of training t...
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