Badan Tenaga Nuklir Nasional: Jurnal BATAN
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Analisis Koefisien Reaktivitas Teras RSG-GAS pada Kondisi Hot Full Power (HFP)
Full text linkAnalisis koefisien reaktivitas teras RSG-GAS pada kondisi Hot Full Power (HFP) telah dilakukan karena sangat berhubungan dengan keselamatan operasi. Perhitungan parameter ini belum pernah dilakukan, saat ini dilakukan dengan menggunakan dengan program komputer WIMSD-5B dan Batan-2DIFF. Program WIMSD-5B menggunakan data nuklir ENDFB-VIII.0 dengan muatan 250gram digunakan untuk menggenerasi tampang lintang makroskopik material teras dan program Batan-2DIFF digunakan untuk perhitungan teras. Tujuan penelitian ini adalah untuk mengetahui besaran parameter neutronik koefisien reaktivitas pada teras RSG-GAS dengan kondisi hot full power. Hasil perhitungan koefisien reaktivitas temperatur moderator dan temperature bahan bakar pada kondisi HFP adalah negatif dan nilainya tidak sama untuk setiap temperatur. Dari hasil perhitungan dapat disimpulkan bahwa teras reaktor bersifat undermoderated dan sesuai dengan harapan. Kata kunci : koefisien reaktivitas, teras RSG-GAS, WIMSD-5B, Batan-2DIFF, hot full powe
COMPUTATION STUDY OF RADIOISOTOPES GALLIUM-68 (68Ga) PRODUCTION USING LONG-LIVED & HIGH ACTIVITY METHODS
Full text linkRadioisotopes used for gamma-ray-based diagnostics have the main problem that imaging resolution quality.Gallium-68 is a positron (β+) emitting radioisotope that has better imaging resolution than gamma-based radioisotopes. Gallium-68 (68Ga) can be produced by irradiating natural gallium or zinc-68 enriched as a target with protons in an accelerator facility. Indonesia has planned to build a cyclotron type accelerator that operates in 13 MeV proton energy and 50 µA proton beam who has initials named DECY-13. Before it was commissioned for radioisotopes production purpose that was must conduct a preliminary study to determine 68Ga optimum irradiation time and properties, one of which was the monte carlo computation method using PHITS v3.24 software. Simulations were begun by irradiating proton with natural gallium target for 25 days with 2 days cooling and zinc-68 enriched for 120 minutes with cooling 10 minutes. The results at EOB of the long-lived process using the natGa target obtained total radioactivity of 189.42 MBq (5.12 mCi). The total radioactivity result of high activity process which used 68Zn enriched as a target was 268.6 GBq (7.259 Ci). the radioactivity was compared with another accelerator, that the long-lived process was too small and uneconomical to done, but the high activity process was feasible to produce. The results of this research expected will be considered as a feasibility study for the 68Ga production process in Indonesia in the future
Cover and Table of Content
No full textCover and Table of Content for Eksplorium Volume 43 No. 1 May 2022 Edition.Cover and Table of Content for Eksplorium Volume 43 No. 1 May 2022 Edition
Ag AND Pd FISSION PRODUCT IMPLANTATION ON SiC LAYER IN TRISO FUEL PARTICLE OF HTGR USING SRIM/TRIM MONTE CARLO COMPUTER
Full text linkAg AND Pd FISSION PRODUCT IMPLANTATION ON SiC LAYER IN TRISO FUEL PARTICLE OF HTGR USING SRIM/TRIM MONTE CARLO COMPUTER. Silicon Carbide (SiC) has excellent characteristics such as wide band gap, high electron mobility, high thermal conductivity, and radiation effects resistance. Therefore, SiC is widely used for various applications, including nuclear fuel systems. SiC is used in TRISO (Tri-Structural Isotropic) coated fuel particle in HTGR (High Temperature Gas cooled Reactor). TRISO, which consists of Inner Pyrolitic Carbon, SiC, and Outer Pyrolitic Carbon, is one of the safety systems features of the reactor. However, one of the issues of the system is corrosion of SiC caused by silver (Ag) and palladium (Pd). Nevertheless, the detailed mechanism of this corrosion phenomenon, such as the existence of Ag and Pd and how deep those two fission products penetrate the SiC layer, are still unknown. This study aims to investigate the physical interaction of Ag and Pd with the SiC coating layer of TRISO nuclear fuel particles. For this purpose, the physical effect of the penetration of the energetic Pd and Ag fission products into the SiC layer has been simulated using SRIM (Stopping and Range of Ions in Matter) /TRIM (TRansport of Ions in Matter) computer code with Monte Carlo method. Various Ag and Pd ion kinetic energies have been employed in this simulation. The results showed the Ag/SiC and Pd/SiC Ion Ranges, Doses, and Damage as the first-step evaluation to understand the corrosion phenomenon of the SiC-layer in the TRISO particles of HTGR
Adsorption of Phenol and Iron In Wastewater Using a Mixture of Active Carbon and Zeolite Modified with Chitosan
Full text linkPhenol (C6H5OH) and iron (Fe2+) contained in electroplating industrial wastewater are toxic even at small concentrations. One of the effective methods to remove these compounds is adsorption because the method is easy and simple. Activated carbon and zeolite are types of adsorbents that are often used in wastewater treatment, but both types of adsorbents are not selective in certain chemicals. In this study, modification of zeolite and activated carbon with chitosan was carried out to adsorb waste containing phenol and Fe2+. The variations used were pH (7 and 9) and the adsorbent composition to study its effect on the adsorption of phenol in the presence of Fe2+. Adsorption was carried out in a bed with circulating waste for 2 hours. Feed at pH 9 with adsorbent mixed of zeolite-chitosan composite (Z-Ch) and activated carbon-chitosan composite (AC-Ch) in a ratio of 1:1 gave the optimal results. Under these conditions, 94% and 97% of phenol and Fe2+ were adsorbed, respectively
Evaluasi Audit Internal Sesuai ISO/IEC 17025/2017 Dalam Memberi Nilai Tambah Organisasi
No full textAudit internal menjadi bagian tak terpisahkan dalam penerapan sistem manajemen pada suatu organisasi. Hasil dari audit internal digunakan sebagai saran perbaikan dan pengembangan sehingga dapat memberikan nilai tambah untuk organisasi. Laboratorium Uji dan Kalibrasi PRTBBN telah terakreditasi ISO/IEC 17025/2017 oleh KAN sehingga melakukan audit setiap tahunnya mengacu pada ISO/IEC 17025/2017. Hasil audit internal selama 4 tahun yaitu tahun 2018, 2019, 2020 dan 2021 terdapat temuan dengan porsi terbanyak dan berulang yaitu klausul 6.4 (Peralatan) sebanyak 18,67%, 7.5 (Rekaman Teknis) sebanyak 11,48% dan 8.4 (Pengendalian Rekaman) sebanyak 11,48%. Hasil ini menunjukan bahwa pada klausul-klausul tersebut masih perlu dilakukan perbaikan dan peningkatan. Analisis pada setiap klausul dilakukan dengan diagram fishbone sehingga dapat diketahui akar masalahny
COLLISION CASCADE AND PRIMARY RADIATION DAMAGE IN SILICON CARBIDE: A MOLECULAR DYNAMICS STUDY
Full text linkSilicon carbide (SiC) is a competitive candidate material to be used in several advanced and Generation-IV nuclear reactor designs as neutron moderator, fuel coating, cladding, or core structural material. Many studies have been performed to investigate the durability of SiC in severe environment in nuclear reactor. However, the nature and behavior of defect induced by neutron irradiation are still not fully understood. This paper is aimed to study collision cascade and primary radiation damage in SiC using molecular dynamics simulation. The potential being used was a hybrid Tersoff potential modified with Ziegler-Biersack-Littmark (ZBL) screening function. The collision cascade was let evolved for 10 ps from a Si or C primary knocked atom (PKA) located initially at the top center of a system containing 960.000 atoms. The simulation was carried out at room temperature as well as at several advanced fission reactor-relevant temperatures. It was obtained that the number of C point defects were larger than the number of Si point defects. The number of stable point defect was found to be temperature-dependent. It was also obtained that the recovery of point defects was larger at high temperature (>800 C)
Tinjauan Teknologi Sintilator Organik Plastik Untuk Detektor Nuklir
No full textTINJAUAN TEKNOLOGI SINTILATOR ORGANIK PLASTIK UNTUK DETEKTOR NUKLIR. Sintilator plastik banyak dikembangkan untuk penggunaan dibidang detektor nuklir, positron emission tomography di kedokteran bahkan untuk hadronic calorimeter dalam riset fisika energi tinggi. Berbeda dengan kristal anorganik seperti NaI(Tl) yang higroskopik dan relatif mahal, sintilator organik plastik meskipun menghasilkan light output di kisaran 10.000 foton/MeV, seperempat dari sintilator anorganik, tetapi menghasilkan waktu peluruhan 2- 4 ns yang sangat responsif sebagai detektor nuklir, disamping keuntungan sifat fleksibel, dapat difabrikasi untuk ukuran /volume besar serta relative ekonomis. Matrik dasar sintilator plastik umumnya menggunakan polystyrene, polyvinyltoluene, bahkan epoxy, yaitu semua polimer aromatik yang mengandung cincin benzene, yang di dalamnya dilarutkan bahan pendar atau dopan seperti PPO (2,5-diphenyloxazole), p-TP (para-terphenyl) serta wavelenght shifter (WLS) seperti POPOP (1,4-bis [2- (phenyloxazolyl)] - benzena) untuk mendapatkan spektrum cahaya tampak di 400 - 425 nm. Artikel tinjauan teknologi ini akan mengulas empat metode sintesis sintilator plastik dan karakterisasinya di bidang deteksi radiasi nuklir, yaitu metode polimerisasi adisi, polimerisasi termoset, metode injeksi dan metode 3D printing
EFFECT OF GAMMA IRRADIATION ON GROWTH OF ESCHERICHIA COLI AND SALMONELLA SP.
Full text linkEscherichia coli was still detected in treated water and Salmonella sp. filled 90% of the pathogenic bacteria content in the Wastewater Treatment Plant (WWTP) sludge. This research aimed to know the effect of gamma irradiation on the growth of E. coli and Salmonella sp. Experimental bacteria were in the form of un-raw material, bacterial isolates. The experimental method of this research gave gamma irradiation doses 1, 2, 3, 4, and 5 kiloGray (kGy) to bacterial suspensions. The isolates were cultured on Nutrient Agar (NA) and followed by cultured on Nutrient Broth (NB) to get the suspensions. The suspensions were put in microtubes for irradiation then followed by enumeration on Plate Count Agar (PCA) in Total Plate Count (TPC) based on SNI-2897-2008. This research proved that the higher dose of gamma irradiation had been given, the lower growth of bacteria (or were the higher death number of bacteria) resulted. Decimal Reduction Dose (D10) value of E. coli and Salmonella sp. were 0,3 kGy and 0,35 kGy, and totally dead by ≥ 3 kGy and ≥ 4 kGy. For further research might be conducted on raw material such as WWTP sludge, wastewater, drinking water, river water, soil water, or organic fertilizer.EFFECT OF GAMMA IRRADIATION ON GROWTH OF ESCHERICHIA COLI AND SALMONELLA SP