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All Journal Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Jurnal Fisika Unand Indonesian Journal of Physics (IJP)
Nur Asiah Aprianti
Nuclear Physics And Biophysics Research Division Physics Study Program Faculty Of Mathematics And Natural Sciences, Institut Teknologi Bandung Jalan Ganesa 10, Bandung 40132, Indonesia
Astronomy Biochemistry, Genetics & Molecular Biology Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics

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Optimization of Small Pb-Bi Cooled Modified CANDLE Burnup based Long Life Fast Reactors Zaki Su'ud; Nur Asiah Aprianti; Rida Siti NM; Hiroshi Sekimoto
Indonesian Journal of Physics Vol 23 No 1 (2012): Vol. 23 No. 1, July 2012
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (653.103 KB) | DOI: 10.5614/itb.ijp.2012.23.1.1

Abstract

In this study optimization of modified CANDLE burnup scheme based long life Pb-Bi Cooled Fast Reactors with natural Uranium as Fuel Cycle Input for small long life reactors has been performed. In this design the reactor cores are subdivided into several parts with the same volume in the axial directions. The natural uranium is initially put in region 1, after one cycle of 10 years of burn-up it is shifted to region 2 and the region 1 is filled by fresh natural uranium fuel. This concept is basically applied to all regions, i.e. shifted the core of I’th region into I+1 region after the end of 10 years burn-up cycle. In this paper we discuss the characteristics of several designs of small long life Pb-Bi cooled fast reactors with modified CANDLE burn-up scheme. Four power levels of 250MWt, 400MWt, 600MWt, and 800MWt were investigated. For 250MWt and 400MWt cores we employed 67.5% high fuel volume fraction nitride fuels with large pin diameter of 1.35 cm while for 600and 800MWt cores we employed 60% fuel volume fraction nitride fuel with 1.2 cm pin diameter. The results show that all cores show similar trend in k-eff pattern change, k-inf pattern change, conversion ratio pattern change, and U-238 and Pu-239 atomic density pattern changes. Maximum discharged burn-up is in the range of 26-33%HM, while peak power density is in the range of 340-410 W/cc.
The Study of Fluid on Rayleigh-Taylor Instability Phenomena using Finite Volume Particle (FVP) Method Nur Asiah Aprianti; Sparisoma Viridi; Zaki Su'ud; Koji Morata
Indonesian Journal of Physics Vol 26 No 2 (2015): Vol. 26 No. 2, December 2015
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1819.244 KB) | DOI: 10.5614/itb.ijp.2015.26.2.6

Abstract

Rayleigh-Taylor instability phenomena were encountered in science world, both on a small scale and large scale (interstellar gas). Rayleigh-Taylor instability is the interpenetration of material that occurs when a fluid is above the other fluid with smaller mass density. The fluid which was originally located in the upper part will continuously broke down and the void is filled by a fluid which was originally located in lower part, so it looks like a bubble. In computational fluid dynamic field, this phenomenon is one of the benchmarks used to test the performance of buoyancy force on a numerical method. On the particle method, particularly, the Rayleigh-Taylor instability has been successfully simulated using Moving Particle Semi-implicit (MPS) method. Similar to the MPS, on this study, the Rayleigh-Taylor instability between the silicon oil and water which driven by buoyancy force was simulated using finite volume particle (FVP) method. From the simulation results it can be concluded that the shape of the bubble produced in the present calculation is similar to the results observed in the experiments and methods of MPS.
SIMULATION OF STRATIFICATION BEHAVIOR OF TWO IMMISCIBLE FLUIDS USING FINITE VOLUME PARTICLE (FVP) METHOD Faris Kamal Islahi; Nur Asiah Aprianti; Asril Pramutadi Andi Mustari; Koji Morita
Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Vol 24, No 1 (2023): February 2023
Publisher : HIMNI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jstni.2023.24.1.6751

Abstract

In this modern era, the need for energy is increasing, and the environmental issues caused by the energy industry are also increasing. Therefore, one of the long-term alternative energy sources is nuclear energy. However, as is well known, there have been many nuclear reactor accidents, such as the Chernobyl, Three Miles Island, and Fukushima reactors. In those cases, there was an accident in the core reactor, especially the melting of the reactor core. One phenomenon is the stratification of the molten metal component of the melted reactor core. Using simulation, this study will discuss the stratification behavior of two immiscible and incompressible fluids. The particle-based simulation method has advantages over the mesh method in simulating free surface conditions and has a lighter computational load. The particle method used in this simulation is the Finite Volume Particle (FVP) method, derived based on the finite volume method by assuming each particle occupies a certain volume. The simulation of the stratification behavior is carried out using three types of fluids, water, cooking oil, and lubricating oil, which are combined into three variations. The stratification simulation results will be compared with the experimental results obtained from the reference. From the simulation results obtained, there is a pattern similar to the experimental results. Simulation data is also processed to obtain the penetration ratio between fluids in each variation and the length of water penetration through cooking and lubricating oil. The results show that the magnitude of the difference in fluid density and viscosity affects the stratification process.
Alat Deteksi Denyut Jantung Tipe Fingertip dengan Sensor Non-invasif untuk Masyarakat Pedesaan (Studi Kasus Desa Raharja, Banjar, Jawa Barat) Maria Evita; Prihatini, Jihan; Sawita, I Kadek Agus Sara; Kamal, Muhammad; Aprianti, Nur Asiah
Jurnal Fisika Unand Vol 14 No 5 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.5.500-506.2025

Abstract

Heart disease is one of the most lethal diseases in the world, including in Indonesia. This disease affects both urban and rural populations Lack of access to medical equipment particularly for heart rate detection, is the reason for developing a fingertip-type heart rate device using a cheap and convenient non-invasive sensor. This system consists of an infrared sensor equipped with an analog filter, an operational amplifier and Arduino Uno microcontroller for signal processing, and an LCD for displaying the heart rate. After calibration, this system was tested on 20 participants in Desa Raharja to validate its performance. In two phases of testing, the average accuracy obtained ranged from 3.28% to 8.08% in phase 1, and from 2.89% to 31.73% in phase 2. Most of the results have met the accuracy standards for heart rate detection equipment. The shortcomings of this research allow for further development in future studies.
Co-Authors Asril Pramutadi Andi Mustari Faris Kamal Islahi Hiroshi Sekimoto Koji Morata Koji Morita Maria Evita Muhammad Kamal Prihatini, Jihan Rida Siti NM Sawita, I Kadek Agus Sara Sparisoma Viridi Zaki Suud