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Saefurrochman Saefurrochman
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ANALISIS DESAIN DAN UJI KINERJA STT-MBE BASIS TRAFO Darsono Darsono; Saefurrochman Saefurrochman; Rian Suryo Darmawan
GANENDRA Majalah IPTEK Nuklir Volume 15 Nomor 2 Juli 2012
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (592.527 KB) | DOI: 10.17146/gnd.2012.15.2.19

Abstract

ANALISIS DESAIN DAN UJI KINERJA STT-MBE BASIS TRAFO. Telah dilakukan analisis desain dan uji kinerja STT-MBE berbasis transformator (trafo) 3 fase untuk menentukan penyebab spesifikasi teknis tidak dicapai pada uji kinerja. Metode analisis dilakukan dari tiga aspek. Pertama analisis dokumen desain dan konstruksi menggunakan standar IEC/SNI dan handbook trafo ABB untuk mengetahui kesesuaian komponen desain. Kedua, simulasi desain trafo menggunakan program VIZIMAG untuk mengetahui kebenaran perhitungan analitik desain. Ketiga, melakukan uji tegangan dadal komponen konstruksi padat dan insulasi oli untuk mengetahui desain keamanan tata letak komponen tegangan tinggi STT. Berdasarkan analisis pertama ternyata hampir 30% bahan komponen STT tidak memenuhi standar trafo. Dari analisis kedua ternyata perhitungan analitik desain trafo sudah benar. Berdasarkan analisis ketiga ternyata tegangan dadal oli terukur 3 kali lebih kecil dari asumsi desain keamanan, sedangkan struktur fleksiglas bisa digunakan karena mempunyai tegangan dadal 45 kV/mm dan flashover 60 kV pada jarak 1 cm. Dari hasil review dokumen desain, hasil analisis eksperimen tegangan dadal dan flashover serta dari simulasi analisis desain trafo terungkap bahwa penyebab utama spesifikasi STT-MBE tidak dicapai, karena asumsi angka keamanan desain tata letak komponen STT sebesar 2 kali tegangan dadal oli trafo adalah aman. Berdasarkan analisis ini dapat disimpulkan bahwa trafo tidak dapat dioperasikan sesuai spesifikasi teknis, namun dengan perbaikan tata letak komponen STT di dalam bejana oli diharapkan dapat dioperasikan sampai 260 kV.Kata kunci : trafo, STT, analisis desain, kinerja, MBE.
ARDUINO AND IOT-BASED OBSERVATION METHOD FOR MONITORING TEMPERATURE, HUMIDITY, AND AIR PRESSURE OF ELECTRON BEAM ACCELERATOR’S ROOM Rachmawati, Isti Dian; Linandia, Ismi Putri Mei; Fajarudin, Rizky; Saefurrochman, Saefurrochman; Adabiah, Suhadah Rabi'atul
GANENDRA Majalah IPTEK Nuklir Volume 26 Nomor 2, 2023
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/gnd.2023.6842

Abstract

The monitoring system for temperature, humidity and air pressure in the electron accelerator’s room has been designed. This research is based on operational environmental monitoring procedures in the accelerator room that must be carried out before the accelerator operates. We offer a simple and adaptable monitoring solution for the electron accelerator room. Parameter data can be monitored using a smart device. Operators do not need to go into the accelerator room to carry out environmental monitoring. The proposed system uses Arduino technology and the Internet of Things (IoT). Data acquisition programming was performed using Arduino IDE and ESP8266 NodeMCU as microcontrollers. The microcontroller then transmits temperature, humidity, and pressure data parameters to the cloud server, where they are then displayed on the smart device via the Blynk app. The results show that the system that has been designed is able to read and store parameter readings on the sensors used and the system has been able to make decisions in the form of notifications about whether the Electron Beam Machine is ready or not to be operated.
AN IMPROVEMENT OF ARJUNA 1.0 CONVEYOR SYSTEM FOR 3D IRRADIATION Saefurrochman, Saefurrochman; Purwanto, Agus Tri; Adabiah, Suhadah Rabi'atul; Sukaryono, Sukaryono; Setiaji, Galih; Arthanto, Dwi Handoko; Anggraeni, Karina; Rachmawati, Isti Dian; Dwiatmaja, Agus; Wijono, Wijono; Nuraini, Elin; Andriyanti, Wiwien; Darsono, Darsono; Adjie, Andreas Bimo Putro
GANENDRA Majalah IPTEK Nuklir Volume 26 Nomor 1, 2023
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/gnd.2023.6826

Abstract

An improved design of the conveyor system of Arjuna 1.0 electron accelerator for 3D object irradiation has been done. The penetration of low energy electrons is less than 1 cm in the surface, causing a challenge for the irradiation process for sterilization of 3D objects. We design a conveyor that can be rotated 360o to irradiate objects evenly. The dimension of this conveyor is 1750 x 600 x 800 mm and the maximum diameter of the object is 7 cm. Based on the Frame Bending Stress analysis to calculate the strength of the conveyor frame, it is shown that the maximum displacement is only 0.029 mm, which is very small so it will cause no disturbance to power transfer from the motor to the conveyor. The normal stress (Smax) is 3.926 MPa and the bending stress for Smax (Mx) and Smax (My), are 2.391 MPa and 3.925 MPa respectively. We also calculate the stress analysis of the 3 mm-thickness of the motor mount and found that the Von-Misses Stress, first, and third Principal Stress are 4.425 MPa, 5.01 MPa, and 1.95 MPa respectively. These results confirm that the design and the material used for the conveyor are safe because the stress is very low than the material’s yield strength which is 207 MPa. The power needed for this conveyor is 0.01724 kW, with a maximum speed is 880 rpm. The new model of 3D conveyor has been constructed and can be implemented to ARJUNA 1.0 to irradiate objects on all its surfaces
Co-Authors Adabiah, Suhadah Rabi'atul Adjie, Andreas Bimo Putro Anggraeni, Karina Arthanto, Dwi Handoko Darsono Darsono Darsono Darsono Dwiatmaja, Agus Elin Nuraini Fajarudin, Rizky Galih Setiaji Linandia, Ismi Putri Mei Purwanto, Agus Tri Rachmawati, Isti Dian Rian Suryo Darmawan Sukaryono Sukaryono Wijono Wijono WIWIEN ANDRIYANTI