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Pengaruh Variasi Penambahan Abu Ampas Tebu dan Serat Ampas Tebu Terhadap Sifat Fisis dan Mekanis Pada Mortar Muhammad Nursani; Pulung Karo Karo; Yanti Yulianti
Jurnal Fisika Indonesia Vol 24, No 3 (2020)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfi.v24i3.55989

Abstract

Penelitian tentang pengaruh variasi penambahan abu ampas tebu dan serat ampas tebu terhadap sifat fisis dan mekanis pada mortar telah dilakukan. Bahan-bahan yang digunakan dalam penelitian ini antara lain abu ampas tebu, serat ampas tebu, semen portland, CaCl dan air. Abu ampas tebu diperoleh dari pembakaran ampas tebu pada suhu 700 ˚C selama 2 jam. Serat ampas tebu diperoleh dari pencacahan ampas tebu menggunakan mesin disk mill dengan ayakan berukuran 5 mm. Perbandingan semen, abu ampas tebu dan serat ampas tebu yang digunakan yaitu sampel A (90%:0%:10%), sampel B (85%:5%:10%) dan sampel C (80%:10%:10%), dengan penambahan CaCl sebesar 5% dari massa total dan 250 ml air. Pengujian yang dilakukan yaitu uji fisis (daya serap air dan kerapatan) dan uji mekanis (kuat tekan, kuat lentur dan kuat tarik belah) serta karakterisasi scanning electron microscope-energy dispersive x-ray spectroscopy (SEM-EDS). Mortar sampel A masuk dalam kategori mortar tipe S dengan kuat tekan sebesar 132,28 kg/cm2, mortar sampel B masuk dalam kategori mortar tipe M dengan kuat tekan sebesar 176,16 kg/cm2 dan mortar sampel C masuk dalam kategori mortar tipe S dengan kuat tekan sebesar 170,68 kg/cm2, secara keseluruhan sampel C memiliki nilai yang lebih tinggi baik secara fisis maupun mekanisnya, mikrostruktur sampel C lebih baik dibandingkan sampel A dan B karena memiliki butiran yang lebih kecil serta terdapat banyak gumpalan yang menyebabkan ukuran pori mengecil sehingga kerapatannya meningkat, penambahan abu ampas tebu meningkatkan jumlah unsur oksigen yang dapat menambah kekuatan mekanis mortar.
Efektivitas Ekstrak Daun Gambir Sebagai Inhibitor Pada Baja Karbon API 5L dengan Perlakuan Panas Menggunakan Larutan NaCl 3% Ilwan Pusaka; Ediman Ginting Suka; Yanti Yulianti
Jurnal Teori dan Aplikasi Fisika Vol. 5 No. 2 (2017): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v5i2.148

Abstract

Abstract.The effectiveness of uncaria gambir leaves extract as inhibitor on carbon steel API 5L with heat treatment in NaCl 3% had been researched. The research was done by weight loss. Corrosion rate had been tested on carbon steel API 5L with heat treatment and carbon steel without heat treatment in NaCl 3% added by soursop leaves extract inhibitor for 168 hours with concentrations of 0%, 2%, 4%, and 6%. The result showed at carbon steel API 5L with and without heat treatment corrosion rate higher at concentration inhibitor 0% that is 0,051 mm/y. While corrosion rate lower at concentration inhibitor 2% that is 0,03%. Until, Efficiency higher at carbon steel API 5L with and without heat treatment in concentration inhibitor 2% that is 61,63% and 66,43%. The X-Ray Diffraction (XRD) characterization result showed at carbon steel API 5L with heat treatment that the phase formed is martensite. At carbon steel API 5L with heat treatment that the phase formed is pure Fe. Scanning Electron Microscopy (SEM) characterization at carbon steel API 5L with heat treatment showed even clusters and larger size, holes, cracks and grain boundary in the surface. At carbon steel API 5L without heat treatment showed uneven clusters and smaller size, holes, cracks, but grain boundary not showed in the surface. Energy Dispersive Spectroscopy (EDS) characterization on sample with inhibitor 0% obtained Cl element and Oxygen larger than inhibitor 2%. Key words:Carbon steel API 5L, soursop leaves extract, corrosion inhibitor, NaCl and heat treatment
Desain Inti (Core) Reaktor SCWR (Super Critical Water-cooled Reactor) Tiga Dimensi (X-Y-Z) Menggunakan Bahan Bakar Thorium Hasil Daur Ulang Sri Harjanti; Yanti Yulianti; Pulung Karo Karo
Jurnal Teori dan Aplikasi Fisika Vol. 5 No. 2 (2017): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v5i2.160

Abstract

The research of three-dimensional (X-Y-Z) core design of SCWR reactor using thorium recycled has been done. Neutronic calculations were calculated by SRAC program. Parameters of this research werefuel enrichment, core reactor sizes, core reactorconfigurations, criticality, and power density distribution. The desain of core reactor was 1/8 three-dimensional (X-Y-Z) slab. Fuel reactor was thorium 20 GWd/t burn as inner,and 30 GWd/t burn as outer. Zirconium as cladding,and light water as coolant. Critical condition was achieved at x = 310 cm, y = 170 cm, z = 190 cm and 2,49% of fuel enrichment. Core power reactor was 3.411 MWt, maximum power density was 366,8356 Watt/cc located at x = 34 (170 cm), y = 1 (5 cm), z = 38 (190 cm) and multiplication factor effective (keff) value was 1.0000000.
Analisis Kecelakaan Reaktor Transient Over Power (TOP) Reaktor SCWR (Supercritical Cooled Water Reactor) Abdullah Haris; Yanti Yulianti; Syafriadi Syafriadi
Jurnal Teori dan Aplikasi Fisika Vol. 6 No. 1 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i1.168

Abstract

Studi Perhitungan Laju Reaksi Neutron Dalam Reaktor SCWR (Supercritical Water Reactor) Model Perangkat (Assembly) Heksagonal Berbahan Bakar Thorium Apriliana Apriliana; Yanti Yulianti; Pulung Karo Karo
Jurnal Teori dan Aplikasi Fisika Vol. 6 No. 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.181

Abstract

The calculation of fission and capture reaction rate with and without filter has been done using REACT of SRAC. In material 1 fission reaction rate with and without filter were increased by increasing percent of U233. The highest fission reaction rate with filter was 5,7194x10-2reaction/cm3sand without filter was 6,1361x10-2 reaction/cm3s. Meanwhile capture reaction rate with and without filter were decreased by increasing percent of U233. The highest capture reaction rate with filter was 2,2156x10-2 reaction/cm3s and without filter was 2,4906x10-2 reaction/cm3s. In material 3, fission and capture reaction rate with and without filter were decreased by increasing percent of U233 in material 1. The highest fission reaction rate with filter was 1,5218x10-2 reaction/cm3s and without filter was 1,6293x10-2reaction/cm3s. The highest capture reaction rate with filter was 2,2156x10-2 reaction/cm3s and without filter was 2,3993x10-2reaction /cm3s. Neutron reaction rate with filter was smaller than neutron reaction rate without filter
Analisis Termal-hidrolik Reaktor Air Bertekanan (Pressurized Water Reactor) Menggunakan Metode LU Faktorisasi Dewi Efendi; Yanti Yulianti; Syafriadi Syafriadi
Jurnal Teori dan Aplikasi Fisika Vol. 6 No. 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.182

Abstract

PERHITUNGAN LAJU REAKSI NEUTRON MODEL PERANGKAT ANNULAR PADA JENIS REAKTOR SCWR (SUPERCRITICAL WATER REACTOR) BAHAN BAKAR THORIUM ismatul lisa; Yanti Yulianti; Syafriadi Syafriadi
Jurnal Teori dan Aplikasi Fisika Vol. 6 No. 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.184

Abstract

The calculation of fission reaction rate and capture reaction with and without filters have been done using the REACT of SRAC. The calculation of fission rate on fuel 1 and 2 were 5,39 x 10-2 reaction/cm3s with filter and 6,35 x 10-2 reaction/cm3s without filter, then of capture reaction rate with filter on fuel 1 and 2 were 2,91 x 10-2 reaction/cm3s, without filter on fuel 1 was 3,9 x 10-2reaction/cm3s and fuel 2 was 3,78 x 10-2 reaction/cm3s. The calculation of capture reaction on cladding with filter was higher than without filter was 2,15 x 10-3 reaction/cm3s, on moderator with filter was lower than without filter was 3,18 x 10-3 reaction/cm3s. The highest neutron spectrum with 1% enrichment of experiment 1 in thermal energy was 6,31 x 10-6 MeV-1 and in fast energy was 6,44 x 10-6 MeV-1, and decreased constantly. Meanwhile of experiment 2, neutron spectrum in thermal energy was 1,37 x 10-5 MeV-1 and in fast energy was 6,91 x 10-6 MeV-1, and decreased significantly from 1% to 2% enrichment then decreases constantly until 5% enrichment
ANALISIS DINAMIKA MOLEKUL PROTEIN LYSOZYME PUTIH TELUR DENGAN MODEL POTENSIAL LENNARD-JONES MENGGUNAKAN APLIKASI GROMACS harry prayoga; Yanti Yulianti; Agus Riyanto
Jurnal Teori dan Aplikasi Fisika Vol. 6 No. 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.186

Abstract

Analisis Termal-hidrolik Reaktor Cepat Berpendingin Gas (Gas Cooled Fast Reactor) Menggunakan Metode Runge Kutta Adeliya Ayu Anggraini; Yanti Yulianti; Posman Manurung
Jurnal Teori dan Aplikasi Fisika Vol. 6 No. 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.189

Abstract

Studi Desain High Temperature Gas-Cooled Reactor (HTGR) Berpendingin Gas Hidrogen Menggunakan Bahan Bakar Thorium Dika Riyan Saputra; Yanti Yulianti; Agus Riyanto
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.206

Abstract

The Research of design reactor HTGR cell core with thorium fuel and hydrogen gas cooled using SRAC program has been done. The reactor was designed to generate maximum thermal power and critical conditions. The parameters on this study are fuel enrichment, atomic density, size and configuration of reactor core, criticality and the distribution of power density. Reactor core calculation was done in two dimensional core (x,y) at 1/6 part of the reactor core with a triangular mesh. The fuel was Th232 and U233, and hydrogen as coolant. In this study, the ideal reactor core design was length (x) was 428 cm and width (y) was 214 cm, the first fuel enrichment was 6,037% and second fuel enrichment was 8%. Reactor core design in this study generated 60 MWth thermal power with maximum power density was 179,6747 Watt/cm3 which is located at x=1, y=18 point and effective multiplication (keff) is 1,000005.
Co-Authors Abdullah Haris Adeliya Ayu Anggraini AGUS RIYANTO Agus Riyanto Ahmad Rosadi Apriliana Apriliana Dewi Efendi Dika Riyan Saputra Ediman Ginting Suka Erika Sempana Ginting harry prayoga Hesti Wahyu Handani Ilwan Pusaka ismatul lisa Junaidi Junaidi - Marjunus, Roniyus Muhammad Nursani Posman Manurung Pulung Karo-Karo Renita Maharani Fauzi Rika Rahayu Setiyaningsih Setiyaningsih Simon Sembiring Sri Harjanti Sri Ratna Sulistiyanti Syafriadi Syafriadi