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All Journal Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Spektra: Jurnal Fisika dan Aplikasinya Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Hafni Lissa Nuri
Pusat Rekayasa Fasilitas Nuklir – BATAN
Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics Social Sciences

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KEBUTUHAN DESAIN AWAL PADA PILOT PLANT PENGOLAHAN MONASIT MENJADI THORIUM OKSIDA (ThO2) Nuri, Hafni Lissa; Prayitno, Prayitno; Jami, Abdul; Pancoko, M.
Eksplorium Buletin Pusat Teknologi Bahan Galian Nuklir Vol 35, No 2 (2014): November 2014
Publisher : Pusat Teknologi Bahan Galian Nuklir - BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (30.019 KB)

Abstract

Pengumpulan data dan informasi ditujukan untuk memenuhi kebutuhan desain awal pilot plant pengolahan monasit menjadi thorium oksida (ThO2). Kandungan thorium pada  monasit di Indonesia cukup tinggi antara 2,9 – 4,1 % dan cukup melimpah terutama di Kepulauan Bangka Belitung. Thorium dapat digunakan sebagai bahan bakar dikarenakan potensinya lebih melimpah dibandingkan uranium. Pabrik pengolahan thorium oksida dari monasit secara komersial didirikan mulai dari pilot plant untuk menguji data laboratorium. Desain pilot plant dimulai dari desain awal, basic design, desaindetil, procurement,dan konstruksi. Kebutuhan untuk desain awal  yang telah dilakukan meliputi  data umpan dan produk, blok diagram proses, deskripsi proses, penentuan kondisi proses, dan jenis alat  utama. Kata kunci:desain, monasit, thorium oksida
FABRICATION OF PLASTIC SCINTILLATOR USING POLYSTYRENE MATRIX BASED Nuri, Hafni Lissa; Pancoko, Marliyadi; Jami, Abdul; Subhiyah, Hana; Ardiyati, Tanti; Sari, Dian Maya; Desviana, Adinda Tisha
Spektra: Jurnal Fisika dan Aplikasinya Vol. 7 No. 3 (2022): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 7 Issue 3, December 2022
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.073.03

Abstract

Experiments on making a plastic scintillator with polystyrene as a base material mixed with fluorescent compounds (primary and secondary dopants) have been performed. Primary dopants (PTP) used to produce emission at wavelengths of visible light and secondary dopants (POPOP) to shift the visible wavelengths to wavelengths that could be detected by Photomultiplier Tube (PMT) ) were carried out. Experiments were performed on the melting points condition of these materials, which had previously been subjected to a thermo-mechanical analysis using a Thermogravimetric Analysis-Differential Scanning Calorimetry (TGA-DSC) machine, where the melting point was in the range of 200-240°C. Furthermore, the fabrication was carried out using the extrusion technique, where polystyrene pellets mixed with PTP (1.5% by weight) and POPOP (0.05% by weight) were fed into an extrusion machine which has four hot areas to obtain a thin plate plastic scintillator. The plates were then analyzed with a UV-Vis Spectrophotometer to determine the absorption spectrum and Fluorescence Spectrophotometer to determine the emission spectrum. From the results of the analysis, it was found that the samples that went through scintillation pellets and without the addition of antioxidants had absorption spectrum data of 330 nm and emission spectrum of 421 nm. These values are in accordance with the characteristics of plastic scintillators on the market.
Penentuan Kondisi Pelarutan Residu dari Hasil Pelarutan Parsial Monasit Bangka Sumarni, Sumarni; Prassanti, Riesna; Trinopiawan, Kurnia; Sumiarti, Sumiarti; Nuri, Hafni Lissa
EKSPLORIUM Vol. 32 No. 2 (2011): NOVEMBER 2011
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2011.32.2.2819

Abstract

Bangka monazite processing to separate its major elements i.e. phosphate (PO4), rare earth (RE), uranium (U) and thorium (Th) through decomposition prosess with NaOH to separate the PO4 first. This prosess produces a residue of (U, Th, RE) hydroxide. Then this residue is dissolved with HCl concentrate partially at 3,7 of pH to separate the RE from U and Th. In this process 62 % of RE is dissolved. The residue of RE dissolution at 3,7 of pH still contain U, Th and RE, so continuation research needed to be done separate U, Th and RE mentioned. The purpose of this research is to determine the optimum condition of residue dissolution as product of partiel dissolution by using concentrate H2SO4. On the next research each element of U, Th and RE will be separated. The research’s parameters are dissolution time, dissolution temperature and consumption of H2SO4. The result showed that the optimum conditions were 2 hours of time, 30 oC of temperature and 100 ml of H2SO4/gram of feed with recovery 92,30 % of U, 97,15 % of Th and 93,46 % of RE.
Perhitungan Stage Mixer Settler untuk Pemurnian Torium (Th) dari Pelarutan Monasit Nuri, Hafni Lissa; Prayitno Prayitno; Jami, Abdul
EKSPLORIUM Vol. 39 No. 2 (2018): NOVEMBER 2018
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2018.39.2.4524

Abstract

Monazite (Ce, La, Nd, Th)PO4 with thorium (Th) content between 3-4 % is significant enough to be processed to produce Th. The initial treatments conducted by using carbonate base reagents (Na2CO3) for monazite leaching to fetch the uranium. The remaining tailings were dissolved with sulfuric acid to produce Th(SO4)2 solution which is then purified from its impurities. The processing is carried out continuously using a mixer settler with the process steps include Th extraction, Th stripping, and organic solvents regeneration. Thorium extraction uses a primene JM-T (RNH2) organic solvent which is a mixture of 0.15M Primene JM; 5% Tridecanol and 95% Kerosine. Meanwhile, the Th stripping process uses 2M HCl solution. For efficiency, regeneration of organic solvents uses 1% H2SO4. To obtain a high recovery and purity from Th, it is necessary to calculate the number of stage mixer settlers using the McCabe Thiele method. Based on the calculation, the number of stage for extraction process, Th stripping, and organic solvents regeneration are 3, 3, and 2 respectively. The total recovery of Th is obtained at 84.90 % where product purity reaches 99.02 %
Perekayasaan Mixer Settler untuk Ekstraksi Siklus II pada Recovery Uranium dalam Larutan Asam Fosfat Jami, Abdul; Nuri, Hafni Lissa
EKSPLORIUM Vol. 34 No. 1 (2013): MEI 2013
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2013.34.1.645

Abstract

Mixer settler is technically designed for extraction and separation process of uranium from phosphoric acid solution. Design calculation results shows that: the mixer settler consists of two parts: part of extraction process in the mixer tank and part of separation process in settler tank. The mixer tank type of box with 4 baffles, the size of mixer tank, 0.8 m width, 0.8 m length, 1 m high of liquid, 1.05 m high of mixer tank, stirrer type of disk 6 blade, and power of mixing 4 hp and the settler tank type of rectangular with size of settler tank, 0.8 m width 5 m length, 1 m high of liquid, 1.05 m high of settler tank. For uranium recovery efficiency up to 91%, extraction process is done in 3 stage counter current flow using a solvent Organic (O) DEHPA-TOPO in Kerosene at a phase of ratio A/O of 2:1. The aqueous enter through stage 3 and the organic solvent enter through stage 1. The process of settling occurred with the value of settling velocity is 0.000694 m/s, dispersion factor Ψ = 0.3638 and the light fraction as the dispersed phase and value of Reynolds number (NRE) = 3,438. Because of the Reynolds number is lower than 5,000, it indicates that the quality of the separation is very good.
Kebutuhan Desain Awal Pada Pilot Plant Pengolahan Monasit Menjadi Thorium Oksida (ThO2) Nuri, Hafni Lissa; Prayitno, Prayitno; Jami, Abdul; Pancoko, Marliyadi
EKSPLORIUM Vol. 35 No. 2 (2014): NOVEMBER 2014
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2014.35.2.2758

Abstract

Data and information collection aimed in order to meetthe needs ofthe initial designfor pilot plantof monazite processing into thorium oxide (ThO2). The content ofthorium inmonaziteis high in Indonesia between 2.9 to 4.1% andrelatively abundantin Bangka Belitung Islands. Thorium can be used as fuel because of its potential is more abundant instead of uranium. Plant of thorium oxide commercially from monazite established starting from pilot plant in order to test laboratory data. Pilot plant design started from initial design, basic design, detailed design, procurement and construction. Preliminary design needs includes data feed and products, a block diagram of the process, a description of the process, the determination of process condition sand type of major appliance has been conducted.
Co-Authors Abdul Jami Ardiyati, Tanti Desviana, Adinda Tisha Dian Maya Sari Hana Subhiyah Kurnia Trinopiawan M. Pancoko Marliyadi Pancoko Prayitno Prayitno Prayitno Prayitno Riesna Prassanti Sumarni Sumarni Sumiarti Sumiarti