Analisis Fraksi Volume Bahan Bakar Uranium Karbida Pada Reaktor Cepat Berpendingin Gas Menggunakan SRAC Code

Analysis of fuel volume fraction with uranium caride fuel in Gas Cooled Fast Reactor (GFR) with SRAC Code is has been done. The calculation used SRAC Code (Standard Reactor Analysis Code) which is developed by JAEA (Japan Atomic Energy Agency), and the data libraries nuclear used JENDL 4.0. There are two calculation has been used, fuel pin cell calculation (PIJ Calculation) and core calculation (CITATION Calculation). In core calculation, the leakage is calculated so the calculation more precise. The CITATION calculation use two type of core configuration, i.e. homogeneous core configuration and heterogeneous core configuration. The power density value of two type core configuration is quite difference. It is better use heterogeneous core configuration than homogeneous core configuration, because the power density of heterogeneous core configuration is flatter than the other. From the analysis of fuel volume fraction, when the volume fraction is increase, the k-eff value is increase. And the optimum design after has been analysis for fuel volume fraction, that is the fuel volume fraction is 49% with a heterogeneous core configuration of three types of fuel percentages, for Fuel1 9%, Fuel2 12% and Fuel3 15%. This reactor is cylindrical, has a core diameter of 240 cm and a core height of 100 cm.

Potensi Pemanfaatan Ulang Sampah Plastik Menjadi Eco-Paving Block

Eco-paving block is a product used for construction consisting of sand and plastic mixes. In order to produce eco-paving blocks, the mixture of sand and concrete was substituted in part with sand and plastics. In order to properly mix plastics to create eco-paving blocks, a plastic smelter was used to generate heat and melt the plastic materials. The plastic material types used in this case was PETE or PETE, which has the characteristics of being flexible and high adhesive properties; along with ABS which can stand pressures. Based on the tests conducted with the plastic smelter using PET, ABS, and the combination of PET and ABS, the most promising result was shown with the combination of PET and ABS. This combination required 8 minutes 21 seconds for the plastics to become fully melted, and a temperature of 278oC. The combination of PET and ABS resulted in a mixture of plastics with strong adhesive properties and durability. This product could potentially be developed into eco-paving blocks. Additional studies regarding the optimum dosage combinations of PET and ABS plastics in eco-paving blocks can potentially be established in order to further optimize the usage of these plastics in eco-paving blocks.

Jaringan Sensor Nirkabel: Studi dan Evaluasi Kinerja LoRa Transmitter dan Long Range Radio Frekuensi (RF) Pada Luar Ruang

Transmitter merupakan tulang punggung komunikasi pada Jaringan Sensor Nirkabel. Sebagian besar transmitter menggunakan frekuensi ism band sehingga jangkauan komunikasinya terbatas sejauh 100 m. Beberapa jenis transmitter yang memiliki kemampuan komunikasi jarak jauh adalah nRF24 1 km dan LoRa. Paper ini melaporkan studi komperasi antara nRF24 1 km dan LoRa dalam komunikasi data, konsumsi daya dan ketahanan terhadap halangan. Hasil studi menunjukkan bahwa LoRa memiliki kemampuan jangkauan 1,6 km dan nRF24 memiliki kemampuan pengiriman sejauh 1 km. NRF24 1 km lebih cocok digunakan untuk komunikasi jarak jauh yang membutuhkan kecepatan yang tinggi dan juga tahan terhadap halangan non- line of sight.

Studi Ekstraksi Teh Hitam terhadap Kandungan Tanin untuk Pembuatan Minuman Teh

Pada penelitian ini telah dilakuan tentang pengaruh temperatur, waktu, dan kecepatan pengadukan pada proses ekstraksi teh hitam. Suhu yang di gunakan pada penelitian ini yaitu 600 C - 70oC. Sedangakan rentang waktu yang di gunakan yaitu berkisar 10-30 menit dengan beda waktu 30detik. Dan dengan kecepatan pengadukan yaitu 100 rpm, hasil ekstraksi dengan di dapat 9 kadar tannin. Kadar tannin tertinggi di dapat dari ekstraksi dengan temperature 750C, waktu 7 menit, dan kecepatan pengadukan yaitu 430 rpm. Dari kadar tannin yamg terbaik di lakukan pengujian kembali denganmenggunakan spektrofotometeruv-vis.Dan di dapat nilai absorbansi terbesar yaitu 0,381 dengan kadar tannin 582,4 %.

Optimisasi Operasi Pemboran Di Basin Afrika Utara

Tujuan pengoptimalan pengeboran adalah untuk mengurangi biaya, meningkatkan kondisi lubang sumur dan integritas reservoir, dengan tetap mengutamakan kinerja keselamatan maksimum dan pemeliharaan lingkungan. Meskipun hasil akhir dari suatu operasi pengeboran mudah diamati, akan tetapi yang hampir sering luput dari perhatian adalah kompleksitas masalah dalam perencanaan dan pelaksanaan operasi Pengeboran. Dalam tulisan ini telah dievaluasi studi kasus pemboran eksplorasi di salah satu basin di Afrika Utara. Selama periode 2006 hingga 2011, peningkatan pengeboran yang berkelanjutan telah dicapai. Elemen kunci dalam optimasi tersebut meliputi fokus pada struktur manajemen team pemboran, perencanaan rekayasa/teknik sumur, perbaikan dalam pengelolaan operasi pemboran seperti praktek manajemen keselamatan di lokasi, dan juga analisis pasca pengeboran untuk mengimplementasikan pembelajaran untuk sumur berikutnya yang akan dibor. Hasilnya, selama pemboran 26 sumur selama tahun 2006 hingga 2011, hari pemboran berhasil dikurangi dari 87 hari (sumur pertama) menjadi rata-rata 40 hari, dengan kemampuan deliverable produksi sumur yang tinggi, juga kinerja catatan keselamatan yang sangat baik.

Implementasi Algoritma SAW (Simple Additive Weighting) Dalam Pengambilan Keputusan Pembelian Mesin Produksi Pada PT Ardhi Karya Teknik

Ardhi Karya Teknik is a company engaged in construction, painting, cooling engineering and information technology. This company has difficulty in making decisions to buy equipment, especially for goods with a high enough value, because the goods purchased must meet certain criteria and be able to help the company's operations effectively and efficiently. This research was conducted to overcome the above, the method chosen in this study was SAW (Simple Additive Weighting) with the general stages: first entering data, second determining the weighting of each assessment criterion, third determining the best value of each criterion. , fourth calculates the value of the normalization matrix, fifth Calculate the final value for each data input by multiplying the normalized matrix with the weight matrix. The selected data is the data with the largest final value. Another method used in making an application is Waterfall. The SAW method is quite effective in assisting in decision making to purchase company operational support equipment.

APLIKASI ALAT PULSE NEUTRON LOGGING UNTUK MENENTUKAN ZONA HIDROKARBON BARU DI LAPANGAN X

Pengukuran Neutron Porosity pada sumur terbuka (Open Hole) ditujukan untuk mengukur indeks hidrogen yang terdapat pada formasi batuan. Indeks hidrogen didefinsikan sebagai rasio dari konsentrasi atom hidrogen setiap cm3 batuan terhadap kandungan air murni pada suhu 75oF. Neutron Porosity log tidaklah mengukur porositas sesungguhnya dari batuan, melainkan yang diukur adalah kandungan hidrogen yang terdapat pada pori-pori batuan. Secara sederhana, semakin berpori batuan semakin banyak kandungan hidrogen dan semakin tinggi indeks hidrogen. Sehingga, shale yang banyak mengandung hidrogen dapat ditafsirkan memiliki porositas yang tinggi pula. Untuk mengantisipasi uncertainty tersebut, maka pada praktiknya, interpretasi porositas dapat dilakukan dengan mengelaborasikan log density logging. Pengukuran diatas dilakukan pada sumur terbuka (Open Hole) untuk mengetahui respon dari litology, salinity, tipe fluida dan lain-lain. Sedangkan, pengukuran Neutron pada sumur tertutup (Cased Hole) akan sulit dan membutuhkan alat yang khusus. Pada Tesis kali ini penulis ingin memberikan suatu metode penilian formasi dengan mengunakan alat Reservoir Tool Monitoring (RMT) yang dapat bekerja di dalam casing maupun di dalam tubing. Kata Kunci : Alat Pulse Neutron Logging, Hidrocarbon dalam Tubing

PENINGKATAN PELUANG BISNIS STRATEGIS PADA PEMASANGAN SPM DAN JALUR PIPA BAWAH LAUT PROYEK SUPPLY AVTUR KE BANDARA SOEKARNO HATTA DARI REFINERY UNIT-VI BALONGAN

Increasing business opportunities from an economic aspect that includes the financial performance of the Refinery Unit VI is very important to manage. Good financial performance will support the company's business continuity, and also have a positive impact on stakeholders. Refinery Unit VI's commitment to improving financial performance is very high, and strives to achieve predetermined key performance indicators (KPI). Refinery Unit VI measures the achievement of KPI regularly every quarter as part of the evaluation. Targets related to current economic performance are the achievement of KPIs on Refinery Gross Margin and Net Margin. The person in charge for recording and reporting financial performance is under the Financial Function. Refinery Unit VI uses Internal Control over Financial Reporting (ICoFR) to control financial reports, where each function that has the authorization uploads it on the ICoFR web system. In 2017, Refinery Unit VI succeeded in 100% compliance with the IcoFR. The realization of the Refinery Unit VI financial performance from 2015 was always above the target despite fluctuations in product prices. This is a good thing, supported by the achievement of the increasing Gross Refinery Margin and Net Margin from 2015–2017. Refinery Unit VI has continuously succeeded in improving financial performance and achieving the highest Gross Refinery Margin among all Refinery Units owned by PT Pertamina (Persero). The installation of SPM and subsea pipelines is the target of increasing the Refinery Unit VI development program.

Perancangan Sistem Informasi Jasa Wedding Organizer pada CV. Boganesia Jaya Berbasis Web

The presence of technology and science has evolved in the world of work and its development, in this Globalization Era, it requires people to participate in these developments. This method uses processing in the field of work which was initially managed manually by recording orders written in a ledger, now managed using modern technology. From the results of this study it can be seen that in recording existing orders on the CV. Boganesia Jaya has not implemented the system or is still using manual methods. In that case some suggestions can be given to the company for further development by means of an information system designed using an application with the web-based PHP and MySQL programming language to solve this problem in CV. Boganesia Jaya which is more effective and accurate.

Electrical Wing Prototype Anti Icing pada Pesawat Komersil

The accumulation of ice on the aircraft's wings can cause a decrease in the aerodynamic properties of the aircraft, increase in weight, and it is difficult to control the aircraft so that it affects aircraft safety. Icing handling on aircraft is growing. One of the newest systems being developed is electrical anti-icing. Therefore, the researcher designed a prototype of an anti-icing electrical wing on a commercial aircraft with advantages in terms of maintenance and lighter components. The purpose of making this prototype is to design an anti-icing electrical wing in the form of a prototype and can be used as an anti-icing. The prototype consists of three parts, namely input, control unit, and heating element. The heating element working system is by attaching the heating element to the surface of the wing, so when the tool is active through the controls, the heating element will work with an indication of the LED on. After testing the Prototype electrical anti-icing function that has been made, it can be used as a de-icing that removes icing that has already frozen on the leading edge.