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All Journal POSITRON Jurnal Fisika Unand Jurnal Penelitian Pertanian Terapan Bunda Edu-Midwifery Journal (BEMJ) Ensiklopedia of Journal Jurnal Ilmu Fisika Borneo Nursing Journal (BNJ) INTEGRITAS : Jurnal Pengabdian BERNAS: Jurnal Pengabdian Kepada Masyarakat Jurnal Kebidanan Malakbi Jurnal Manajemen Pendidikan Dasar, Menengah dan Tinggi [JMP-DMT] Indonesian Journal of Physics (IJP) Indonesian Journal of Community Empowerment and Service Jurnal Indonesia Sosial Teknologi Socio-political Communication and Policy Review
Dian Fitriyani
Universitas Andalas
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Analisis Neutronik pada Reaktor Cepat dengan Variasi Fraksi Pengayaan Bahan Bakar UN-PuN, UC-PuC dan MOX Asnita, Reni; Fitriyani, Dian
Jurnal Fisika Unand Vol 8 No 3 (2019)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.8.3.266-272.2019

Abstract

Telah dilakukan penelitian tentang analisis neutronik pada reaktor cepat dengan memvariasikan fraksi pengayaan pada bahan bakar UN-PuN, UC-PuC dan MOX. Analisis ini bertujuan untuk mengetahui pengaruh perubahan fraksi pengayaan (enrichment) terhadap karakteristik neutronik pada reaktor cepat berpendingin Pb-Bi. Penelitian dilakukan secara simulasi komputasi menggunakan kode FIITB.CHI yang dikembangkan dalam bahasa pemrograman Delphi 7.0 untuk geometri teras 3D XYZ dengan variasi pengayaan berkisar antara 11%-20%. Penelitian dilakukan dengan mengamati parameter-parameter neutronik yaitu faktor multiplikasi neutron dan distribusi fluks neutron. Hasil analisis menunjukkan bahwa variasi fraksi pengayaan memberikan karakteristik neutronik yang berbeda-beda pada ketiga jenis bahan bakar. Untuk mencapai kondisi kritis bahan bakar MOX memerlukan fraksi pengayaan yang paling besar yaitu 14%-16% dibandingkan dengan bahan bakar UN-PuN sebesar 12%-14% dan bahan bakar UC-PuC sebesar 13%-15%. Distribusi fluks neutron pada grup energi rendah (grup ke-3 dan ke-4) didapatkan nilai fluks neutron yangpaling tinggi terutamauntuk bahan bakar MOX, sedangkan untuk neutron energi tinggi (grup ke-6 dan ke-7) didapatkan fluks neutron yang rendah terutama untuk jenis bahan bakarUC-PuC. Semakin tinggi energi neutronnya akan didapatkan fluks neutron lebih besar di energi neutron rendah.Kata kunci: Reaktor cepat, UN-PuN,UC-PuC, MOX, fraksi pengayaan, faktor multiplikasi neutron dan distribusi fluks neutron.
Analisis Pengaruh Temperatur Input Terhadap Kekritisan High Temperature Gas Reactor Berbahan Bakar TRISO Dengan Pelapis Zirkonium Karbida Rezki, Wanda Feri; Fitriyani, DIan
Jurnal Fisika Unand Vol 8 No 3 (2019)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.8.3.295-300.2019

Abstract

Analisis pengaruh temperatur masukan terhadap kekritisan High Temperature GasReactor (HTGR) telah dilakukan.HTGR yang diteliti berbahan bakar UO2 yang dilapisi TRISO dengan bahan pelapis berupa karbon pirolitik dan zirkonium karbida (ZrC).Variasi temperatur masukan 800˚C-1600˚C untuk bahan bakar dan temperatur pendingin dari 300˚C-700˚C.Reaktor ini menggunakan gas helium sebagai pendingin dan parameter yang diamati adalah faktor multiplikasi efektif (keff) pada teras reaktor.Penelitian ini dilakukan dengan komputasi menggunakan kode SRAC 2006 (Standard Thermal Reactor Analysis Code System) library yang digunakan yaitu JENDL-3.3. Teras Reaktor HTGR dibagi menjadi 8 region. Simulasi reaktor dilakukan dengan memvariasikan temperatur pendingin dalam setiap variasi temperatur bahan bakar, Dari setiap simulasi didapatkan faktor multiplikasi neutron dalam setiap variasi temperatur.Faktor multiplikasi neutron mengalami penurunan setiap kenaikan temperatur bahan bakar begitu juga dengan reaktivitas reaktor.Koefisien reaktivitas temperatur memenuhi standar yang ditetapkan oleh BAPETEN yaitu bernilai negatif.reaktor dalam keadaan kritis sempurna pada temperatur bahan bakar sebesar 1200˚C dan temperatur pendingin sebesar 500˚C.Kata kunci: faktor multiplikasi neutron, HTGR,  temperatur, TRISOzirkonium karbida
Optimisasi Ukuran Teras High Temperature Gass-cooled Reactor (HTGR) dengan Daya 30 MWt Tipe Pebble Bed Berbasis Bahan Bakar Uranium Armanita, Desi; Fitriyani, Dian; Setiadipura, Topan
Jurnal Fisika Unand Vol 9 No 1 (2020)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.9.1.100-109.2020

Abstract

Telah dilakukan optimasi ukuran teras Reaktor daya Eksperimental (RDE). Optimasi ini bertujuan untuk memperoleh ukuran teras yang optimal untuk RDE 30 MWt berdasarkan aspek neutronik antara lain discharge burn up, fuel residence time dan distribusi daya dan aspek keselamatan. Pada tahap awal dilakukan optimasi pass bahan bakar. Pass bahan bakar menyatakan jumlah sirkulasi bahan bakar ke teras reaktor dan parameter optimasi pass adalah nilai power peaking factor mendekati 1, discharge burn up tinggi serta memiliki temperatur puncak bahan bakar setelah DLOFC rendah. Berdasarkan parameter tersebut didapatkan pass optimal adalah 5 pass. Variasi ukuran teras ditentukan dengan dua cara, yaitu variasi ukuran teras pada volume tetap dan variasi tinggi teras pada diameter tetap. Tahap selanjutnya, terhadap ukuran teras yang optimal, dilakukan optimasi fraksi enrichment dan heavy metal loading bahan bakar. Dari hasil perhitungan diperoleh bahwa pada volume tetap (5 m3) parameter-parameter neutronik bernilai optimal jika ukuran diameter teras 1,5 m dan tinggi 2,83 m, sedangkan pada diameter teras tetap (1,8 m) parameter-parameter neutronik optimal pada ukuran tinggi teras 3,931 m.  Pada kedua ukuran teras ini aspek keselamatan, discharge burn up dan fuel residence time optimal pada enrichment 17% dan heavy metal loading 6 grU/pebble. Core size optimization of Experimental Power Reactor (EPR) has been done. This optimization aims to obtain the optimal core size for the RDE 30 MWt based on the neutronik aspect among other discharge burn ups, fuel residence time, power distribution and safety aspect. In the early stages the fuel pass optimization is done. The fuel pass is the amount of fuel circulation to the reactor core and the pass optimization parameter is the value of power peaking factor approaching 1, high discharge burnup as well as having a fuel peak temperature after DLOFC is low. According to the parameters, the optimal pass is 5 passes. The variation in the size of the core is determined in two ways, which is the core size variation on fixed volumes and a high variation of the core at fixed diameter. The next stage, against the optimal core size, carried out the optimization of the fraction of enrichment and heavy metal loading fuel.  From the results of the calculations obtained that on a fixed volume (5 m3) neutronik parameters are optimal if the size of the core diameter is 1.5 m and height 2.83 m, while on the fixed diameter of the ratio (1.8 m) The optimal neutronik parameters of on the size Height of core 3.931 m.  On both of these core sizes are safety aspects, discharge burn up and fuel residence time is optimal on the enrichment of 17% and heavy metal loading 6 grU/pebble.
Analisis Neutronik dan Temperatur Bahan Bakar Setelah Depressurized Loss of Forced Cooled (DLOFC) pada Pebble Bed Reactor (PBR) dengan Upgrade Daya Rosyidah, Amalia; Fitriyani, Dian; Setiadipura, Topan
Jurnal Fisika Unand Vol 9 No 2 (2020)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.9.2.231-237.2020

Abstract

Pada penelitian ini dilakukan analisis neutronik dan temperatur bahan bakar setelah DLOFC pada Pebble Bed Reactor (PBR) dengan upgrade daya. Reaktor acuan yang digunakan dalam penelitian ini yaitu HTR-PM. Penelitian ini bertujuan untuk memperoleh desain reaktor dengan daya 300 MWt. Perhitungan dalam penelitian ini menggunakan software PEBBED6 code. Pada tahap awal dilakukan upgrade daya pada desain default HTR-PM. Parameter neutronik yang diperhatikan dalam penelitian ini yaitu nilai burnup yang tinggi dan temperatur puncak bahan bakar setelah DLOFC tidak melebihi 1620 oC. Berdasarkan capaian kedua parameter tersebut, daya pada desain default HTR-PM hanya dapat ditingkatkan hingga 260 MWt. Selanjutnya perhitungan pada daya yang di-upgrade disertai dengan pengaturan pada enrichment dan HM loading. Dari hasil pengamatan disimpulkan bahwa dengan enrichment dan HM loading yang tinggi maka semakin tinggi densitas bahan fisil sehingga dapat memperbesar nilai burnup dan juga temperatur puncak setelah DLOFC. Selanjutnya dilakukan optimasi ketinggian dan diameter teras reaktor dengan volume teras default (77,44 m3). Diameter teras yang diperkecil dapat menghantarkan panas hasil reaksi fisi keluar teras lebih maksimal. Kemudian dilakukan pengaturan enrichment dan HM loading bahan bakar kembali untuk mendapatkan daya maksimal. Desain optimal pada penelitian ini diperoleh untuk daya 300 MWt dengan HM loading 6 gU/pebble, enrichment 8,5% dan tinggi teras 14,64 m yang dapat menghasilkan nilai burnup 77,11 MWd/Kg.HM. In this research neutron and fuel temperature analysis is done after DLOFC on the Pebble Bed Reactor (PBR) with a power upgrade. The reference reactor used in this study is HTR-PM. This study aims to obtain a reactor design with 300 MWt of power. The calculation in this study use the PEBBED6 code software. In the initial stage, a power upgrade is performed on the default HTR-PM design. The neutronic parameters considered in this study are high burnup values and peak temperature after DLOFC do not exceeding 1620 oC. Based on the achievement of the two parameters, the power in the default HTR-PM design can only be increased up to 260 MWt. Furthermore, calculation on the upgraded power are accompanied by setting on the enrichment and HM loading. The next step is optimizing the height and diameter of the reactor core by maintaining the default core volume (77.44 m3). The reduced diameter of the terrace can deliver maximum heat from the fission reaction outside the terrace. Then the enrichment and HM loading of the fuel are regulated to get maximum power. The optimal design in this study was obtained for 300 MWt power with HM loading of 6 gU/pebble, 8.5% enrichment and a terrace height of 14.64 m which can produce a burnup value of 77.11 MWd/Kg.HM.
Analisis Ukuran Teras dan Rasio H/D pada Molten Salt Fast Reactor dalam Tinjauan Neutronik Azurah, Puti Berkah; Fitriyani, Dian; Permana, Sidik
Jurnal Fisika Unand Vol 10 No 1 (2021)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.10.1.34-40.2021

Abstract

Telah dilakukan simulasi pada Molten Salt Fast Reactor (MSFR) berdaya 100 MWth untuk menganalisis pengaruh bentuk dan ukuran teras terhadap kinerja neutronik. Penelitian ini menggunakan kode komputasi SRAC (Standard Thermal Reactor Analysis Code System) yang dikembangkan oleh JAEA (Japan Atomic Energy Agency). Analisis dilakukan terhadap 9 variasi bentuk dan ukuran teras pada teras MSFR silinder dua dimensi (2-D) dengan peninjauan terhadap parameter neutronik yaitu faktor multiplikasi efektif,. Perhitungan neutronik dilakukan dengan mengatur komposisi bahan bakar dalam teras. Hasil perhitungan menunjukkan bahwa seluruh variasi model teras menghasilkan nilai faktor multiplikasi efektif di atas 1,0 pada awal masa operasi reaktor. Model teras C1 (volume teras 6 m3, bentuk teras tall) merupakan model teras yang paling baik dalam mempertahankan kekritisan reaktor dengan reactivity swing sebesar 0,0721. A simulation of 100 MWth Molten Salt Fast Reactor (MSFR) has been carried out to analyze the influence of core shape and size to its neutronic performance. This research used computational code SRAC (Standard Thermal Reactor Analysis Code System) developed by JAEA (Japan Atomic Energy Agency). Analysis has been done to 9 variation of core shape and size on two-dimensional (2-D) cylinder of  MSFR in terms of neutronic parameter such as the effective multiplication factor with arrangement of fuel composition. The neutronic calculation shows that all of core type bring out the value of effective multiplication factor above 1,0  in the beginning of reactor operation. C1 is the most optimum core model because it can maintain the criticality of the core reactor with reactivity swing value of 0,0721.
Analisis Sensitivitas Dalam Deteksi Homogenitas ROI Pada Pengukuran Kualitas Citra Pesawat CT-Scan Sari, Merly Dwipurnama; Fitriyani, Dian; Prasetio, Heru
Jurnal Fisika Unand Vol 12 No 1 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.12.1.158-163.2023

Abstract

Telah dilakukan penelitian tentang analisis sensitivitas dalam deteksi homogenitas ROI pada pengukuran kualitas citra pesawat CT-Scan. Penelitian ini bertujuan untuk memperoleh verifikasi metode baru untuk mengevaluasi homogenitas citra CT-Scan dengan cara mencari nilai CT-Number pada 12 titik (posisi arah jam 1 sampai jam 12) dengan analisis 6 area ROI berupa grafik atau histogram serta membandingkan hasilnya dengan metode pada umumnya yaitu pada hasil citra pesawat CT-Scan di area ROI pada posisi arah jam 12, jam 3, jam 6, jam 9 dan pusat fantom sehingga dapat mengetahui tingkat sensitivitas kedua metode tersebut dalam mendeteksi homogenitasnya. Pengambilan data yaitu data sekunder dari hasil citra fantom air pada CT-Scan sebanyak 30 citra yang diperoleh dari Pusat Riset Teknologi Keselamatan, Metrologi dan Mutu Nuklir-Organisasi Riset Tenaga Nuklir-Badan Riset dan Inovasi Nasional (PRTKMMN-ORTN-BRIN). Hasil pengukuran menunjukkan bahwa nilai keseragaman noise dari 30 data sampel terdapat 21 data sampel memenuhi batas toleransi yaitu ≤ 2 HU. Hasil ini memenuhi standar perka BAPETEN No. 2 Tahun 2018 tentang uji kesesuaian pesawat sinar-X radiologi diagnostik dan intervensional. Perbandingan sensitivitas dalam mendeteksi homogenitas ROI pada pengukuran kualitas citra pesawat CT-Scan menunjukkan bahwa metode ROI pada penelitian ini mampu menghasilkan sensitivitas yang lebih baik dalam mendeteksi homogenitasnya.
Pengaruh Filter Lowpass Terhadap Kualitas Citra CT-Scan Paru-Paru Ulga, Sofhia; Muttaqin, Afdhal; Fitriyani, Dian
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.587-593.2024

Abstract

A low pass filter can be employed to enhance the quality of lung CT-Scan images by smoothing sharp transitions and reducing noise present in the images. The aim of this research is to implement a low pass filter by applying different weight values. The kernel weights applied in filtering using a low pass filter are 1/6, 1/9, 1/10, and 1/16. This study is a quantitative research employing 102 images. The findings of this study reveal that applying low pass filters with different kernel weights yields varying image qualities. Based on the quality tests of Mean Squared Error (MSE) and Peak Signal to Noise Ratio (PSNR), it was found that the kernel weight of 1/6 produces images with excellent quality at 17,65%, good quality at 28,93%, and fair quality at 53,92%. Meanwhile, with a kernel weight of the 1/9, 36,36% of the images were found to have good quality, while 64% exhibited lower quality. The application of a low pass filter with a kernel weight of 1/10 resulted in 39% of the images being of good quality and 61% of the images being of lower quality. At the kernel weight of 1/16, 2% of the images were obtained with excellent quality, 40% with good quality, and 58% with lower quality. Based on the MSE and PSNR test values, it was found that applying a kernel weight of 1/6 resulted in better image quality compared to applying other kernel weights. From the overall result, it was found that the application of a low pass filter was not suitable for improving the quality of CT-Scan images of the lung, so other methods could be applied to improve the quality of the images.
Repeat Voting in the 2018 Cirebon Mayoral Election: Examining the Contributing Factors and the Professionalism of Cirebon's Electoral Commission (KPU) Fitriyani, Dian; Sardini, Nur Hidayat; Erowati, Dewi
Jurnal Indonesia Sosial Teknologi Vol. 5 No. 11 (2024): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v5i11.8760

Abstract

Elections are essential democratic processes that require integrity, professionalism, and adherence to electoral laws. However, the 2018 Cirebon Mayoral Election faced allegations of electoral malpractice, leading to a re-voting order by the Constitutional Court. This research analyzes the Re-voting events in the 2018 Cirebon Mayor and Deputy Mayor Elections. There were allegations of fraud committed by election organizers in Cirebon raised by the Bamunas Setiawan and Effendi Edo candidate pairs. However, the existence was denied by the Cirebon City KPU at the case title of the dispute hearing on the results of Pilwakot Cirebon 2018 at the Constitutional Court of the Republic of Indonesia. This research focuses on analyzing qualitative studies with a case study strategy. Data obtained through literature study. This phenomenon is pure negligence in electoral governance by the KPU, which disrupts professionalism in the institution.
Faktor Ekonomi Memengaruhi Pernikahan Remaja Perempuan Fitriyani, Dian
Jurnal Kebidanan Malakbi Vol 2 No 2 (2021): Agustus 2021
Publisher : Jurusan Kebidanan Poltekkes Kemenkes Mamuju

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33490/b.v2i2.371

Abstract

World Health Organization (WHO) in collaboration with UNICEF which aims to improve the health of mothers and newborns in 25 countries that contributed the highest maternal mortality rate, one of them is in Indonesia. Adolescent who become pregnant will increase the health risks for her and baby. The maternal mortality reach approximately 70,000 deaths each year and maternal mortality is closely related to pregnancy and childbirth by adolescents aged 15 – 19 years in the worldwide. Objective of the research is to analyze the factors that influence adolescent girls’ marriage in Indramayu regency. This study uses qualitative method, the paradigm fenomenology. The subjects taken by purposive sampling technique. The informants is adolescent women who married about aged <20 years, her husband, and her family as much as 21 people. The results shows that family economic factors affecting marriage adolescent girls in the Indramayu regency that is caused economic status, the attitude of materialistic. Limitations of the study, there are several girls who live outside the city because they took the husband or for work outside the city, so it's likely there are many factors that have not been revealed. Economic factors affecting marriage adolescent girls in Indramayu regency, is causes by economic status and the attitude of materialistic. It is necessary to consider the policy of the Marriage Law with the age of >20 years and the prohibition of marriages <20 years so that young girls avoid negative impacts, both physical and psychological.
Co-Authors Abu Khalid Rivai Abu Khalid Rivai Abu Khalid Rivai Adrial, Rico Afdal Afdal Afdhal Muttaqin Ahmad Fauzi Pohan Ainul Mardiyah Ainul Mardiyah, Ainul Alimin Mahyudin Amalia Rosyidah Arif Budiman Armanita, Desi Asnita, Reni Astuti Astuti - Astuti Astuti Azurah, Puti Berkah Bery, Winda Surya Dahyunir Dahlan Damayanti, Elok Dedi Mardiansyah Desi Armanita Dewi Erowati, Dewi Dian Milvita Dina Cinantya N Dina Cinantya N Dora Andris Dora Andris, Dora Dwi Pujiastuti Dwi Puryanti Eif Sparzinanda Elistia Liza Namigo, Elistia Elvaswer Elvaswer Enny Zarvianti Enny Zavianti Eza Pelita Zebua, Fajri Fadillah Ahmad Feriska Handayani Irka, Feriska Handayani Galih Putra Drantou Munggaran Galih Putra Drantou Munggaran, Galih Putra Drantou Hajjatun Khairah Hajjatun Khairah, Hajjatun Handayani Irka, Feriska Harmadi Harmadi Hartini, Teti Heru Prasetio Heru Prasetio Heru Purnomo Imam Taufik Imam Taufiq Indarta Kuncoro Aji Jaenudin Kartahadimaja Juita, Refi Kartadarma, Supriyatni Mardiyanto Mardiyanto Mardiyanto Mardiyanto Marzuki Marzuki Meiby Astri Lestari Meiby Astri Lestari Meqorry Yusfi Merly Dwipurnama Sari Mohammad Ali Shafii Mora Mora Muharsyah, Robi Muldarisnur, Mulda Muthia Annisa Putri Mutya Vonnisa Nella Permata Sari Nevi Haryani Nevi Haryani Nini Firmawati Nur Hidayat Sardini Nurkholilah Nurkholilah Nurkholilah, Nurkholilah Nurman Abdul Hakim Puspita, Riri Diah Puti Berkah Azurah Puti Berkah Azurah Putri, Muthia Annisa Raflis, Helen Rahmat Rasyid Ramacos Fardela Refi Juita Rena, Suci Ramda Reni Asnita Rezki, Wanda Feri Ridwan Ridwan Riska Riska Riska Riska Rosyidah, Amalia Sardi, Widya Sari, Merly Dwipurnama Sidik Permana Sidik, Adi Permana Siti Utami Dewi, Siti Utami Sofhia Ulga Solly Aryza Sri Handani Sri Herlinda Sri Mulyadi Sri Mulyadi Sri Oktamuliani Sulistioso G.S Sulistioso G.S, Sulistioso Sulistioso Giat Sukaryo Sulistioso Giat Sukaryo, Sulistioso Giat Suryanti, Krisna Susilo Wirawan Topan Setiadipura Topan Setiadipura Topan Setiadipura, Topan Trengginas Eka Putra Sutantyo Ulga, Sofhia Wanda Feri Rezki Widya Sardi Winda Surya Bery Zaki Suud Zarvianti, Enny Zavianti, Enny Zulfi