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Indonesian Journal of Physics (IJP)
Published by Institut Teknologi Bandung
ISSN : 23018151     EISSN : 29870828     DOI : https://doi.org/10.5614/itb.ijp
Core Subject : Science, Engineering,
Astronomy Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering
Indonesian Journal of Physics welcomes full research articles in the area of Sciences and Engineering from the following subject areas: Physics, Mathematics, Astronomy, Mechanical Engineering, Civil and Structural Engineering, Chemical Engineering, Electrical Engineering, Geotechnical Engineering, Engineering Science, Environmental Science, Materials Science, and Earth-Surface Processes. Authors are invited to submit articles that have not been published previously and are not under consideration elsewhere.
Arjuna Subject : Fisika dan Astronomi - Fisika Nuklir dan Molekuler, dan Ooptik
Articles 5 Documents
 1 
Search results for , issue "Vol 21 No 1 (2010): Vol. 21 No. 1, January 2010" : 5 Documents clear
System Development on the Uncertainty Propagation Analysis on Estimation of Environmental Radiation Exposure Mike Susmikanti; Entin Hartini; Nursinta Adi Wahanani; Khairina Ns
Indonesian Journal of Physics Vol 21 No 1 (2010): Vol. 21 No. 1, January 2010
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (200.931 KB) | DOI: 10.5614/itb.ijp.2010.21.1.1

Abstract

This paper describes the system development to measure the uncertainty propagation analysis on estimation of environmental radiation exposure. The estimation of environmental radiation exposure is one of the important things that needs to be calculated as a result of nuclear activities in nuclear facilities from exploration and mining, nuclear fuel processing, nuclear power station, nuclear fuel repository or radioactive waste management. The nuclides that result from the radioactive waste are very hazardous to environment. One of the most hazardous materials resulted from the radioactive waste is Radon (222Rn). People who are exposed to excessive Radon emission might have lung cancer. However, the estimation of the Radon exposes to the environment is quite complicated as there are many parameters to be considered. Moreover, the estimation also includes several assumptions about the process of the exposure. Therefore, the main topic of this paper is the uncertainty of the input parameters of the model to be developed. Furthermore, this paper will apply the Monte Carlo method to estimate the propagation analysis of Radon exposure in nuclear waste facility. In addition, the developed system will make use of Nuclear Regulatory Committee (NRC) Regulatory Guide model to estimate the propagation analysis from radioactive storage and waste management. Finally, the system software will be developed using open source and multiplatform environments.
Density-Functional Study of Electronic Band Structure of Graphene with H2, H, and N Impurities Taufik Adi Nugraha; Fatimah A. Noor; Mikrajuddin Abdullah; Khairurrijal Khairurrijal
Indonesian Journal of Physics Vol 21 No 1 (2010): Vol. 21 No. 1, January 2010
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (774.768 KB) | DOI: 10.5614/itb.ijp.2010.21.1.2

Abstract

Graphene is widely investigated for many applications because of its unique properties. One of the most surprising phenomena is the change of its electronic band structure due to impurities adsorption. The density-functional study has been performed to obtain the electronic band structure of graphene with molecular hydrogen H2, atomic hydrogen H, and atomic nitrogen N impurities. Pure graphene has no band gap because the bonding and anti-bonding states are degenerate at the K point at which the Fermi level passes. Molecular hydrogen H2 adsorption gives the same result, while atomic hydrogen H and nitrogen N adsorptions on graphene could result in indirect-band gaps of 2.67 and 4.68 eV, respectively. These results bring impure graphene as a promising candidate for electronic device applications in the future.
Parallel Burnup Analysis of Long-life Fast Reactors Using Multi-core Programming Imam Taufiq; Zaki Su'ud; Abdul Waris; Mitra Djamal
Indonesian Journal of Physics Vol 21 No 1 (2010): Vol. 21 No. 1, January 2010
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (328.676 KB) | DOI: 10.5614/itb.ijp.2010.21.1.3

Abstract

A scalable parallel program for burnup analysis of long-life fast reactor has been succesfully built. The scalability test was conducted by comparing the program performance on dual-core and quad-core platforms. The best speedup gain were 1.72 on dual core 2.0 GHz, 3.58 on quad-core 2.4 GHz and 3.05 on quad-core 3.2 GHz. The slight drop of the speedup on quad-core 3.2 GHz could be well explained in connection with communication-time needed in running parallel version of the program.
Study on Annual Internal Radiation Dose from Consumption of Sweet Potatoes Contaminated by 134 Cs Idam Arif; Siti Nurul Khotimah; Octolia Tobigasa Tambunan; Poppy Intan Tjahaja
Indonesian Journal of Physics Vol 21 No 1 (2010): Vol. 21 No. 1, January 2010
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (127.379 KB) | DOI: 10.5614/itb.ijp.2010.21.1.4

Abstract

The transfer of 134Cs from soil to sweet potato crops has been investigated. Sweet potato crops were cultivated in soil contaminated by 134Cs with concentration of 167.62 Bq/g as well as in non-contaminated soil as control. The 134Cs activity concentrations of leaves, stems, roots, tubers and the whole plant were determined every week up to 16 weeks. 134Cs activity concentrations of soil in root zone and outside root zone were also determined. The maximum transfer factor for the whole sweet potato plants takes place at the second week with TF value of 1.277. The maximum TF value for each parts are roots (18.448), tubbers (13.153), stems (1.241), and leaves (0.746). Annual equivalent dose was calculated based on the activity of sweet potato plants at harvest time. This research obtained annual internal radiation dose from consumption of sweet potatoes contaminated by 134Cs of 0.0185 mSv/year. This value compared with average annual dose limits recommended by BAPETEN, IAEA and ICRP respectively was 0.14%, 0.37%, and 0.19%.
A Code Development for PWR Efficiency Analysis and Energy Conversion Process Simulator Utaja Utaja; Arjoni Amir; Elfrida Saragi
Indonesian Journal of Physics Vol 21 No 1 (2010): Vol. 21 No. 1, January 2010
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (211.206 KB) | DOI: 10.5614/itb.ijp.2010.21.1.5

Abstract

Nuclear Power Plant is the energy producer which converts the nucleus binding energy to heat energy and then converts to the electrical energy. The conversion process from heat energy to the mechanical energy and then becomes to the electrical energy, is an important process. The main problem is how much the heat energy can be converted to the work which is known as the efficiency of the energy conversion. The other problem is how the energy- conversion process on the turbine-steam generator system takes place. The efficiency analysis includes the saturated steam data reading, and repeating calculation, which are very tedious if they are done by manual calculation. In such a manner, the energy conversion process includes the efficiency conversion, nozzel process, and valve calculation, therefore a computer code for calculation process is needed. This research is directed to a computer code development for the heat to work conversion analysis and for heat conversion process simulation. This software is based on the Rankine cycle of saturated steam, the nozzel thermodynamics on open cycle, and the fluid flow in the valve. Among the input processes are the steam pressure on the turbine inlet, the vacuum pressure in the condenser, the amount of the regenerator, the electrical power, and the reheater temperature. The result is displayed as entropy versus temperature graphical, which shows the variation of pressure, temperature, and the steam flow rate along the Rankine cycle. The total steam flow rate for a certain power is also displayed on the monitor. This variable is also displayed in the block diagram of the simulator. The pressure, temperature, and the steam consumption determine the amount of the total thermal energy which should be generated in the reactor core, determine the turbine and pipe size, where these variables are used on the next design process step. Using this software, the energy conversion calculation on the nuclear power plant could be done easier and faster.

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