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Agus Riyanto
Departement of Physics, University of Lampung, Indonesia, 35141
Control & Systems Engineering Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Desain High Temperature Gas-Cooled Reactor (HTGR) Model Geometri Heksagonal Dua Dimensi dengan Bahan Bakar Thorium Hasil Daur Ulang Mutia Utari; Yanti Yulianti; Agus Riyanto
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 1 (2020): Journal Of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (327.399 KB) | DOI: 10.23960/jemit.v1i1.6

Abstract

The Research about the design of high temperature helium gas-cooled reactor (HTGR) terraces with thorium fuel recycled using the SRAC program has been completed. This research includes the percentage of fuel enrichment, reactor core size, reactor core configuration, criticality, and the distribution of the power density. The calculation of reactor core is done in two dimensions \sfrac{1}{6} hexagonal terrace section with a triangular mesh. The fuel is used, i.e. thorium with a burn-up of 20 GWd/t and 30 GWd/t, and helium gas as a cooler. The results obtained in this study show that the ideal HTGR reactor core design with reactor core size and configuration are (x) 22 cm at point (y) = 2035,05 cm and at (y) 11 cm at point (x) = 2035,05 cm, then enrichment in fuel 8%. The result of maximum power density is 550.3685 Watt/cm3 where the position at (x) = 22 cm and axis (y) = 11 with the effective multiplication factor value keff of 1,0000002.
Perhitungan Burn Up pada Reaktor HCLWR Model Geometri Heksagonal Dua Dimensi BahanBakar Uranium menggunakan SRAC COREBN Wahyuning Ramadhanta Ardanti; Yanti Yulianti; Agus Riyanto; Syafriadi Syafriadi
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 1 (2020): Journal Of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (361.126 KB) | DOI: 10.23960/jemit.v1i1.8

Abstract

This study about burn up calculations on the HCLWR reactor with two dimensional hexagonal geometric models of uranium using SRAC COREBN has been carried. This study used uranium-235 and uranium-238 as the fuels, light water as coolant and moderator. The calculation was done with computational simulation of COREBN. The calculation aims to produce a conversion ratio more than 1 and a critical multiplication factor (keff). The research used fuels enrichment, burn up period, burn up step, linier power and volume fraction parameters. The percentage of enrichment from U1 and U3 were 3% and U2 was 2,5%. The volume fraction of each material was 52% fuels, 12% cladding, and 36% coolant, the reactor operating period for 548 days with 6 step of burn up then the reactorpower is 2400 MW and the linear poweris 1,792722 MW/cm. The calculation of conversion ratio was 1,01233 and keff was 0,901.
Efektivitas Ekstrak Daun Jambu Biji (Psidium Guajava l.) Sebagai Inhibitor Pada Baja Karbon St37 dalam Medium Korosif NaCl 3% Dian Mardiana; Ediman Ginting; Agus Riyanto
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 3 (2020): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

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Abstract

The effectiveness of guava leaf extract as an inhibitor of St37 carbon steel in a corrosive medium of 3% NaCl had been researched. The concentration of guava leaf extract inhibitor was used 0%. 3%. 5% and 7% with immersion time of 4 and 8 days. Corrosion rate testing was done by weight loss method. The results of the research at each immersion time, showed that the optimum concentration of leaf guava extract to inhibit corrosion is 7% and the longer time immersion resulted in decreasing corrosion rate on St37 carbon steel. The maximum effectiveness of inhibitor occurred at 7% concentration with 8 days immersion time which is 70,12%. Characterization using Scanning Electron Microscopy (SEM) in sample St37-4-7 and St37-8-7 not all surfaces corroded, but on samples St37-4-0 and St37-8-0 almost all samples were corroded. This is reinforced with eds results in which sample St37-8-0 and St37-4-0 have a lower FeO content than sample St37-8-7 and St37-4-7. The X-Ray Diffraction (XRD) result shows that the phase was Fe.
Pengaruh Variasi Konsentrasi Inhibitor Ekstrak Daun Kakao (Theobroma Cacao) Terhadap Laju Korosi Baja ST 37 Dalam Larutan HCl 3% Syafriadi Syafriadi; Risca Adriana; Agus Riyanto
Journal of Energy, Material, and Instrumentation Technology Vol 4 No 1 (2023): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v4i1.35

Abstract

The effectiveness of cacao leaf extract (Theobroma Cacao.) used as an inhibitor on St 37 steel sample. Which cures in HCl 3 % Corrosive Medium for 144 hours, the inhibitor concentration variation added 0 %, 3%, 6 %, 9 %, and 12 %, respectively. The sample rate is measured by using the loose-weight method. The results show that the lowest sample is 1.397 mm/y of 12%, and the highest is 3.694 mm/y of 0 %. Inhibitor efficiency to the sample St 37 Stainless steel portrays adequate progress to 62.66% with 12% concentration. X-Ray Diffraction Results acquired BCC with Fe-a phase along with SEM that forms an agglomeration, cracked, and holes which result in its corrosion. In addition, EDS contains FeO Element, which indicates that stainless is still affected by corrosion and the reduced FeO content in the sample was less. Thus three samples characterized and measured show that avocado leaves effectively as an inhibitor to the sample St 37 in HCl 3% corrosive medium.
Co-Authors Dian Mardiana Ediman Ginting Mutia Utari Risca Adriana Syafriadi Syafriadi Wahyuning Ramadhanta Ardanti Yanti Yulianti