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

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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.
Sintesis dan Karakteristik Struktur, Sifat Fisis, dan Sifat Mekanik Komposit Aspal Silika dengan Variasi Komposisi Aspal Silika (20%:80%wt; 15%:85%wt; 10%:90%wt) Enang Widwiyantoro; Simon Sembiring; Syafriadi Syafriadi; Suprihatin Suprihatin
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 2 (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 (370.32 KB) | DOI: 10.23960/jemit.v1i2.20

Abstract

Synthesis and characterization of asphalt silica composites with various compositions have been carried out 20%: 80%wt; 15%: 85%wt; 10%: 90%wt. Silica synthesis was carried out using the sol-gel method. The materials used are rice husks, solid asphalt, distilled water, gasoline, NaOH 1,5% and HNO3 10%. This research was conducted for knowing the effect variations composition of asphalt silica on the phase structure, physical, and mechanical properties. The results of characterization asphalt silica composites with X-Ray Diffraction (XRD) obtained nothing change of phase and so that the phase structure still amorphous that consist of amorph silica and amorph carbon. The result of water adsorbent testing obtained that all variation was infest the standard, which was above 10%. The result compressive strength testing obtained the variation 15%:85%wt got the highest value amount 47,55 Mpa.
Karakteristik Struktur Mikro Komposit Aspal Silika Sekam Padi Dengan Variasi Komposisi (20%:80%, 15%:85% dan 10%:90%) Qori Sari Dewi; Simon Sembiring; Syafriadi Syafriadi; Ediman Ginting
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 2 (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 (460.954 KB) | DOI: 10.23960/jemit.v1i2.23

Abstract

Synthesis and characterization of rice husk and asphalt silica composites with various compositions have been carried out 20%: 80%, 15%: 85% and 10%: 90%. Silica synthesis from rice husk wa carried out using the sol-gel method. The materials used are rice husks, solid asphalt, distilled water, gasoline, NaOH and HNO3. This research was conducted of variations in the composition the effect of silica and asphalt on the microstructure and structure of the sample. The characterization results of Scanning Electron Microscopy and Energy Dispersive Spectroscopy (SEM-EDS) on the surface of silica asphalt composites in the form of erratic clots and cracks on the surface of the sample with an average grain size of 3.483 µm, 8,127 µm, and 7,192 µm. The analysis EDS results in the elements content contained in the sample elements of carbon (C), silicon (Si), oxygen (O), a little element of sulfur (S) and aluminum (Al). Then, the results of the X-Ray Diffraction (XRD) characterization obtained the structure of amorphous silica and amorphous carbon.
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 Agus Riyanto Ediman Ginting Enang Widwiyantoro Qori Sari Dewi Risca Adriana Simon Sembiring Suprihatin Suprihatin Wahyuning Ramadhanta Ardanti Yanti Yulianti