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All Journal Jurnal Keteknikan Pertanian Jurnal Teknologi Pertanian JRPM (Jurnal Review Pembelajaran Matematika) Adi Widya : Jurnal Pengabdian Masyarakat AGROTECH : JURNAL ILMIAH TEKNOLOGI PERTANIAN Jurnal Ilmiah Padma Sri Kreshna Jurnal PEKA (Pendidikan Matematika) Jurnal Pendidikan Matematika Indonesian Journal of Mathematics Education Hipotenusa: Journal of Mathematical Society Journal on Mathematics Education Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir
Masrukan Masrukan
Universitas Widya Mataram
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Education Environmental Science Mathematics Social Sciences Other

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PHASE CHANGES ON 4H AND 6H SIC AT HIGH TEMPERATURE OXIDATION Jan Setiawan; Ganisa Kurniati Suryaman; Masrukan
Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol. 22 No. 2 (2016): Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/urania.2016.22.2.3091

Abstract

The oxidation on two silicon carbide contains 6H phase and contains 6H and 4H phases has been done. Silicon carbide is ceramic non-oxide with excellent properties that potentially used in industry. Silicon carbide is used in nuclear industry as structure material that developed as light water reactor (LWR) fuel cladding and as a coating layer in the high temperature gas-cooled reactor (HTGR) fuel. In this study silicon carbide oxidation simulation take place in case the accident in primary cooling pipe is ruptured. Sample silicon carbide made of powder that pressed into pellet with diameter 12.7 mm and thickness 1.0 mm, then oxidized at temperature 1000 oC, 1200 oC dan 1400 oC for 1 hour. The samples were weighted before and after oxidized. X-ray diffraction con-ducted to the samples using Panalytical Empyrean diffractometer with Cu as X-ray source. Diffraction pattern analysis has been done using General Structure Analysis System (GSAS) software. This software was resulting the lattice parameter changes and content of SiC phases. The result showed all of the oxidation samples undergoes weight gain. The 6S samples showed the highest weight change at oxidation temperature 1200 oC, for the 46S samples showed increasing tendency with the oxidation temperature. X-ray diffraction pattern analysis showed the 6S samples contain dominant phase 6H-SiC that matched to ICSD 98-001-5325 card. Diffraction pattern on 6S showed lattice parameter, composition and crystallite size changes. Lattice parameters changes had smaller tendency from the model and before oxidation. However, the lowest silicon carbide composition or the highest converted into other phases up to 66.85 %, occurred at oxidation temperature 1200 oC. The 46S samples contains two polytypes silicon car-bide. The 6H-SiC phases matched by ICSD 98-016-4972 card and 4H-SiC phase matched by ICSD 98-016-4971 card. Diffraction pattern on 46S also showed lattice parameter, composition and crystallite size changes. The lattice parameter changes not significant. For 6S and 46S samples at 1400 oC, the 6H-SiC phase changes into other phases more than 50 % from its original weight percentage.
PENGARUH PROSES SINTERING TERHADAP PERUBAHAN DENSITAS, KEKERASAN DAN MIKROSTRUKTUR PELET U-ZrHx Masrukan; Mujinem
Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol. 22 No. 1 (2016): Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/urania.2016.22.1.2742

Abstract

The process of sintering fuel pellets U-ZrHx performed to obtain a higher density compared pellets before sintered. At first, U-ZrHx pellets made from the content of Zr respectively 35%, 45% and 55% by weight. Sintering process is carried out for 1 hour at varying temperature 1100°C, 1200°C and 1300°C with an increase rate of 2°C temperature/ min, then lowered the temperature at a rate of decrease in temperature of 10°C / min until room temperature. U-ZrHx pellets that have been sintered subsequently subjected to various tests, such as: the dimensions, density, hardness, and microstructure. In testing the density, it appears that at the same Zr composition, but the sintering temperature is higher than an increase in the density. When seen in the same sintering temperature and Zr content is higher then the lower the density obtained. Micro hardness testing results show that the composition Zr 35% fixed and 55% were sintered at the sintering temperature is higher, have the higher the hardness, and then decreases as the sintering temperature increase. If the test results viewed in the sintering temperature fixed but the content of Zr is different, it can be seen from the content of Zr 35% (U-35ZrHx) to 45% (U-45ZrHx) an increase in hardness and will decrease to an increase in the content of Zr to 55% (U- 55ZrHx). Meanwhile, the results of the microstructure observation of the pellets can be seen that at composition Zr fixed but the sintering temperature is higher, then the distance between the powder / porosity increasingly dense. When viewed from the sintering temperature fixed but the composition increasingly higher Zr it is seen that higher Zr composition, the density between the powder in the pellets decreased. It can be concluded that the sintering process the pellets will increase density, hardness, and distance between powder increasingly dense. The optimum condition is achieved at sintering process the pellets with a composition of 45% Zr (U-45ZrHx) sintered at temperatures of 1200°C. In these conditions the sintered the pellets has a density of 8.673 g/cm3, hardness of 661 HVN without developing cracks.
PERBANDINGAN DENSITAS PELET UO2 HASIL PELETISASI MENGGUNAKAN SERBUK DAN MIKROSPIR Etty Mutiara; Meniek Rachmawati; Masrukan
Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol. 22 No. 1 (2016): Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/urania.2016.22.1.2743

Abstract

A pelletization process UO2 fuel has been developed using UO2 microsphere as a substitute of UO2 powder. Microspheres are spherical, free flowing and porous with certain hardness (soft particle). The benefit of using microsphere in pelletization process is dust free in compaction and more effective in packing so the granulation process and solid lubricants are not required. It is hypothesized that the use of UO2 microsphere in the pelletization process will provide higher sintered pellet density than UO2 powder at the same pelletization process parameters. UO2 microsphere size used in this pelletization was 900 μm with crushing strength of 2.0 N/particles while the UO2 powder size between 150 and 850 μm. The pelletization processes of UO2 microsphere and UO2 powder were performed by varying the compacting pressure between 200 MPa up to 500 MPa and sintered at temperatures of 1100 °C for 6 hours in an atmosphere of hydrogen and nitrogen gas mixture. Characterizations performed on the green and sintered pellets of UO2 microsphere and UO2 powder were dimension measurements, weighing and densities measurements. The densities of green and sintered pellets of UO2 microsphere were higher than the green and sintered pellets densities of UO2 powder with corresponded compaction pressure variations. The results indicate that the density of the green pellets both compaction results UO2 powder and UO2 microsphere increased with increasing compacting pressure. microsphere UO2 pellets density crude ranged from 82.1 to 84.2%TD. At the same sintering conditions, both Compaction UO2 powder and UO2 microsphere. Compaction shows the density increases with the greater pressure compacting process. The sintered pellets densities of UO2 obtained from this research were not appropriate with density requirements of PWR fuel. It is necessary to perform advanced research related to the effective pelletization process parameters and UO2 microsphere specifications in providing the appropriate sintered pellets densities.
Co-Authors Adi Nur Cahyono Ahmad Thoriq Alifah Irmawati Ambar Rukmini Arief Agoestanto Ary Woro Kurniasih Bertina, Bernadeta Wiska Pramestia Cahya, Nabella Dwi Darmawan Hidayat Darmawan, Eman Drupadi Ciptaningtyas Dwi Biyantoro Dyah Titin Laswati Etty Mutiara Fahmi Rafika Perdana Fahrizi, Ahmad Luthfi Fajar Al Afghani Fiersta, Nissa Clara Firsta, Nissa Clara Ganisa Kurniati Suryaman Gorotomole, M. Alamin Hadijaya Halim, Mansyur Ali Idra Faudu, Muhammad Iqbal Kharisudin Ismail Maskromo Isnarto Isyuniarto Iwan Junaedi Jablonski, Simone Jan Setiawan Khumairo, Siti Latifatul Kristiana Sri Utami Kuntjahjawati SAR Ludwig, Matthias M. Husna Alhasa Maman Kartaman Ajiriyanto Maulana, Bagus Surya Meniek Rachmawati Muhammad Achirul Nanda Mujinem Mujinem Mulyono Munahefi, Detalia Noriza Nereroan, Yuliana Nur Purwandhani, Siti Oehler, Deng-Xin Ken Opsa Lena Pamungkas, Mieko Taqwa Pratopo, Lukito Hasta Purwadi, Dani Radika Widiatmaka Regilia, Dety Rukmi, Kuntjahjawati Susilo Adi SAR, Kuntjahjawati Scolastika Mariani Setyani, Arie Siti Aidah Sri Lestari Harjanta Syarif Hakim, Isna Tunnisa, Fitra Umar Santoso Yanlinastuti Yanlinastuti