One of the goals in improving design compact portable micronuclear heat pipe reactors is to enhance their operating life so that they can generate maximum power within safe nuclear, thermal, and mechanical limits with minimal human intervention. This work carries out an analysis estimate effect non-uniform fuel enrichment thermo-mechanical performance a 1 MW thermal uranium nitride fueled Micro Nuclear Heat Pipe Reactor (MNHPR). For neutronic analyses, open-source Monte Carlo code OpenMC...

Selective laser melting (SLM), a metal powder fusion additive manufacturing process, has the potential to manufacture complex components for aerospace and biomedical implants. Large-scale adaptation of these technologies is hampered due presence defects such as porosity part distortion. Nonuniform melt pool size major cause defects. The changes heat from previous bed tracks. In this work, effect sourced neighbouring tracks was modelled feedback control designed. objective regulate...

The nonlinear output of a photovoltaic (PV) panel under different irradiance and temperature values, poses challenge for the design Maximum power point trackers (MPPT). An MPPT optimizes being generated from PV varying environmental conditions by virtue algorithms which are controlling duty cycle DC-DC converter. Conventionally hill climbing open circuit voltage methods have been deployed this purpose provide cheap easy way tracking, however their drawbacks low accuracy, slow operation...

Bio-Mechatronics is the field that deals with passive and active prosthetic limb design. The conventional prosthesis carries constant mechanical properties so motion of joints not similar to humans while type more realistically represents human motion. latter however, expensive than consumes energy. Semi-active less but its results are very much it a better solution control gait artificially. This research based on design leg can simulate pattern normal person's gait. divided into two parts:...

Pakistan is among the emerging economies of South Asia. Despite current progress and ambitious future goals set by government, nation faces many challenges, foremost being poverty unemployment. a 210 million people with 60% population under 30 years age, has dire need for training its burgeoning young provide them skills needed their useful gainful employment. This paper gives critical analysis technical education status in upgradations absorbing technologies possible avenues skill...

Active below-knee prosthesis has been commercially available but the present day devices consume high amount of torque, resulting in power requirement. A gap complete understanding biomechanics ankle-foot followed by dynamic interaction an amputee and is one main hitches developing optimal bio-mimetic prosthesis. This paper highlights 1) Electromechanical modeling system (AFS) Pro-e® 2) Dynamic AFS 3) Optimization torque. 1DOF electro-mechanical model wearable as a result torque required to...

People with lower extremity amputations face great hardship in keeping pace the world around them. The solution for their problems is use of advanced prosthetic devices which can help them to regain freedom mobility. But exorbitant cost such a hindrance. Hence, there requirement development low devices. main objective this research design effective, light weight and durable device that be used by wide range transfemoral amputees. system has been designed according anthropometric constraints....

An optimal design analysis is carried out for an explosives’ detection system (EDS) based on thermal neutron activation (TNA) of a sample under investigation. The objective this work to use genetic algorithm (GA) obtain the optimized moderator that would yield “best” signal in system. In preliminary analysis, full Monte Carlo (MC) simulation estimate effectiveness various moderators, namely, water, graphite, and beryllium with respect radiative capture (n,γ) reactions Since MC...

Neutronic analysis of a conceptual heat pipe-cooled micronuclear reactor with 70 % enriched uranium nitride fuel is carried out by modeling the core and peripheral control drum movement to estimate power distribution. The configuration results in non-uniformities hotspots. For removal, empirical formulae have been used case sodium, lithium, potassium working fluids. neutronic simulation was OpenMC code. It has found that radial flux peaking as high ~20 can occur at various stages movement....

Seeking optimal material distribution in a nuclear system to maximize response function of interest has been subject considerable engineering. Examples are the fuel reactor core achieve uniform burnup using minimum critical mass and use composite materials with an mix constituent elements detection systems radiation shielding. For such studies, variational methods have found be useful but, they used for standalone analyses often restricted idealized models, while more elaborate design...

: The energy deposition and radiation dose from commonly used radioisotopes, 125I,103Pd, 131Cs, for brachytherapy of cancers is estimated using Monte Carlo (MC) simulations. To enhance the dose, gold nanoparticle (GNP) solutions are injected into tumor; this results in more effective shorter therapy duration. It thus important to estimate enhancement factor (DEF) achievable by a radioisotope. research presented paper focuses on comparative analysis radioisotopes. N-particle code MCNP5 was...

Soft islanded system is the current trend of electrical energy distribution system. These micro-grid systems are not only sustainable, environment friendly, conserving but also minimally dependent on national grid, therefore reducing overall load main grid. However, to manage multiple sources and loads deal with constraints each source cumbersome for manual traditional procedures as they require intelligence achieve optimality in performance. Therefore, this work an intelligent fuzzy logic...

In multiplying systems, such as nuclear reactors and criticality experiments, it is desirable to place the fissile material in optimal or ‘best’ way reduce critical mass of system well achieve uniform fuel burnup. This paper considers two methods, namely Pontryagin’s maximum principle (PMP) Monte Carlo (MC) perturbation for estimating a minimum configuration. These methods are applied an elementary multizone model pressurized water reactor (PWR) experiment estimate mass. It found that while...

Functional metal parts with complicated geometry and internal features for the aerospace automotive industries can be created using laser powder bed fusion additive manufacturing (AM) technique. However, lack of uniform quality produced in terms strength limits its enormous potential general adoption industries. Most defects selective melting (SLM) are associated a nonuniform melt pool size. The area may fluctuate spite constant SLM processing parameters, like power, speed, hatching...

Nuclear and process industry has seen tube bundle failures more frequently in recent years. There is some concern that the practice of structural configuration not advanced as rapidly thermal design heat exchangers. Catastrophic vibration a can be avoided if natural frequency kept well above estimated existing turbulent buffeting frequencies. Flow distribution partial admission to due upstream piping further complicates system. In this paper, been modeled beam on multiple supports. Effects...

The success of solar thermal systems for electricity production hinges very crucially on the selection, mechanical design and optimal operation an energy storage system which can enable continuous a power plant. being investigated include solid graphite, encapsulated Phase Change Materials (PCMs) liquids such as water ammonia. A option large solar-thermal is liquid ammonia by its endothermic dissociation converts to nitrogen hydrogen gases, be synthesized exothermically recover heat when...