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Atom Indonesia Journal
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Core Subject : Science,
Exist for publishing the results of research and development in nuclear science and technology Starting for 2010 Atom Indonesia published three times a year in April, August, and December The scope of this journal covers experimental and analytical research in all areas of nuclear science and technology. including nuclear physics, reactor physics, radioactive waste treatment, fuel element development, radioisotopes and radio pharmaceutical engineering, nuclear and radiation safety, neutron scattering, material science and technology, as well as utilization of isotopes and radiation in agriculture, industry, health and environment.
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Articles 5 Documents
Search results for , issue " Vol 31, No 1 (2005): January 2005" : 5 Documents clear
Experimental Study of Quenching Process During Bottom Reflooding Using “Queen” Test Section Juarsa, M.; Antariksawan, A.R.; Joko, P.; Ismu, H.; Edy, S.; Kiswanta, Kiswanta
Atom Indonesia Vol 31, No 1 (2005): January 2005
Publisher : PPIKSN-BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (363.604 KB) | DOI: 10.17146/aij.2005.359

Abstract

Phenomenon of quenching of hot fuels in core during bottom reflooding following loca event is investigated in order to understand the performance cooling process. the study is conducted experimentally using queen test section which allow study of rod surface temperature histories based on which the heat fluxes are estimated. the visual observation is also done to study the boiling regimes. the test variables are initial rod temperature, i.e. 400oc, 500oc and 600oc, and coolant flow rate, i.e. 0,01kg/s, 0.02 kg/s and 0.04 kg/s with constant water inlet temperature of 30oc. the results shows different heat transfer regimes such as film boiling, transition boiling, nucleate boiling and convective single phase heat transfer regimes. for specified initial rod temperature, the higher flow rate provides high rewet velocity and higher maximum heat flux, then quenching process is more effective.
Irradiation for the Safety and Quality of Home Style Frozen Snacks Irawati, Z; Natalia, L; Nurcahya, CM; Anas, F; Tampubolon, M
Atom Indonesia Vol 31, No 1 (2005): January 2005
Publisher : PPIKSN-BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (69.459 KB) | DOI: 10.17146/aij.2005.123

Abstract

There are to market frozen prepared meals for microwaving or conventional way of preparation. Such meals. which offer convenience growing trends in Indonesia, and lesser time preparation are available in the developed countries, either chilled with limited shelf-life or frozen for long term sale in supermarkets. Irradiation at pasteurization doses has a potential role in improving the microbiological safety and shelf-life of chilled-prepared meals. Medium doses of gamma irradiation, 3-7 kGy, applied to spring rolls, rissole and croquette, in combination with frozen state during irradiation, followed by storage at 5 ± 2°C, have been conducted in order to ensure the safety and quality of the products during storage. The three different snacks. six pieces each. were vacuum packed in a laminate pouch of Poliester/Aluminum foil/LLDPE followed by fteezing over night at -20°C prior to irradiation at cryogenic condition. Irradiation at a dose of 7 kGy could relatively maintain the quality of the products during three months of storage 5 ± 2°C, based on different parameters, such as microbiological assessments, some chemical characteristics, and organoleptic analysis using five hedonic scales.
Effect of Heating Treatment on Synthetic Ceric Oxide as Inorganic Resin for Immobilization of Cadmium-(II) Soenarjo, S; Wijaya, C; Elzan, R; Sriyono, Sriyono
Atom Indonesia Vol 31, No 1 (2005): January 2005
Publisher : PPIKSN-BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (329.176 KB) | DOI: 10.17146/aij.2005.124

Abstract

The immobilization of cadmium-(II) following nuclear reaction of 114Cd (n,γ) 115Cd → 115mIn or 112Cd (p,2n) 111In is absolutely needed concerning to the quality of resulting radioisotope products and the efficiency of enriched target utilization. This presented study is based on hypothesis that heating treatment on synthetic ceric oxide resin will increase the binding capacity of Cd(II) over the resin. The aim of the presented study is to gain more experimental data supporting utilization of synthetic ceric oxide resin as separating agent in production of indium radioisotopes using enriched cadmium targets. Experiments in cold system using natural cadmium, instead of high-enriched cadmium, have been carried out, wherein a method of UV-spectrophotometry was performed for quantitative determination of Cd(II). It was found that the synthesized ceric oxide dried at 90 - 100°C was in form of hydrate compound formulated as CeO2.q H2O where q = (0.8868 ± 0.0026). The value of q descended to 0.1706 and to 0.0400 as influenced by heating treatment up to 400°C and 800°C respectively along with a change on the crystallinity of the ceric oxide from semi crystalline to purely crystalline. The binding capacity of Cd(II) on ceric oxide dried at 90 – 100°C was found to be (4.71 ± 0.08) × 10-2 mg Cd(II)/mg resin and significantly increased to (11.71 ± 0.24) × 10-2 and to (14.70 ± 0.17) × 10-2 mg Cd(II)/mg resin due to heating treatment up to 400°C and 800°C respectively. It can be concluded that the synthetic ceric oxide resin enable to be exploited for immobilization of Cd(II).
Conductivity and Structure of Superionic Composite (AgI)0.6(NaPO3)0.4 Kartini, E; Sakuma, T; Purwanto, A; Kamiyama, T; Collins, MF
Atom Indonesia Vol 31, No 1 (2005): January 2005
Publisher : PPIKSN-BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (175.774 KB) | DOI: 10.17146/aij.2005.125

Abstract

Superionic conductors are of considerable interest from both application and fundamental points of view. Superionic solid electrolytes can be used for batteries, fuel cells and sensors. We have used melt quenching to make a new superionic composite (AgI)0.6(NaPO3)0.4 which exhibits an ionic conductivity of about 2 x 10-4 S/cm at ambient temperature. The conductivity of crystalline AgI and NaPO3 glass are lower of orders of magnitude. (AgI)0.6(NaPO3)0.4 is a composite material containing both crystalline and glass phases. The paper presents the conductivity as a function of temperature measured by impedance spectroscopy and the crystal structure performed by a high resolution powder diffractometer, VEGA at the Neutron Science Laboratory (KENS), KEK, Japan.
Measuring the Corrosion Rate of Aluminum by Using Ultra Thin Layer Activation Technique Kambali, I.; Suryanto, H.; Parwanto, Parwanto
Atom Indonesia Vol 31, No 1 (2005): January 2005
Publisher : PPIKSN-BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (160.194 KB) | DOI: 10.17146/aij.2005.358

Abstract

Corrosion rate of aluminum (99.9% purity) in 0.001 M hydrochloride acid solution has been measured by using Ultra Thin Layer Activation (UTLA) technique. Iron foil of 25 μm thickness was used as the primary target and activated by 10.2 MeV proton beam coming from BATAN’s cyclotron with irradiation dose of 0.73 μAh (9.534 x 1015 protons/cm2). Radioisotope 56Co formed on the foil would have sufficient kinetic energy to run out of the foil’s surface and be implanted on the aluminum used as the secondary target. After 2 days of cooling down, about 0.397 MBq of 56Co stayed on the foil was counted by NaI(Tl) detector coupled with Multi Channel Analyzer (MCA).It was found that about 9.45% of the total 56Co formed on the iron foil was successfully implanted into aluminum target. Corrosion test of aluminum was conducted in a 2 inches diameter pipe filled with 0.001 M hydrochloride acid flowing with a rate of 80 liters/minute. The corrosion rate of the aluminum was determined from the change of 56Co activity during the process. The result of experiment indicated that the sample was corroded with a very slow rate of 0.064 nm/minute and 0.0054 nm/minute for measuring time of 0-180 and 180-300 minutes respectively.

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