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All Journal Jurnal Teknologi Reaktor Nuklir Tri Dasa Mega JKM (Jurnal Kebidanan Malahayati)
Susyadi Susyadi
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Energy Health Professions Materials Science & Nanotechnology

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DEVELOPMENT OF EXPERIMENTAL POWER REACTOR (EPR) MODEL FOR SAFETY ANALYSES USING RELAP5 Andi Sofrany Ekariansyah; Muhammad Subekti; Surip Widodo; Hendro Tjahjono; Susyadi Susyadi; Puradwi Ismu Wahyono; Anwar Budianto
JURNAL TEKNOLOGI REAKTOR NUKLIR TRI DASA MEGA Vol 21, No 2 (2019): JUNI 2019
Publisher : Pusat Teknologi Dan Keselamatan Reaktor Nuklir (PTKRN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1853.799 KB) | DOI: 10.17146/tdm.2019.21.2.5449

Abstract

Pebble bed reactor design, classified as the high temperature gas-cooled reactor (HTGR), is currently being part of BATAN main program to promote nuclear energy by starting the Experimental Power Reactor (EPR) program since 2015. Starting from 2018, the detail design document has to be submitted into nuclear regulatory body for further assessment. Therefore results of design analysis have to be supplemented by performing a design evaluation, which can be achieved by developing the model of the EPR.  The development is performed using RELAP5/SCDAP/Mod.3.4 as the thermal-hydraulic analysis code validated for the light-water reactor having module for the pebble fuel element and non-condensable helium gas. Methodology of model development consists of defining the helium flow path inside the reactor pressure vessel, modelling of pebble bed core including its power distribution, and modelling of reflector components to be simulated under 100 % core power. The developed EPR model results in design parameters, which confirm the main thermal data of the EPR, including the pebble and reflector temperatures. The peak pebble temperature is calculated to be 1,375 °C, which requires further investigations in the model accuracy, since the reference values are around 1,015 °C, even it is below the pebble temperature limit. For safety analysis, the EPR model can be used under nominal core flow condition, which produces more conservative results by paying attention on the RELAP5 specific modules for the pebble bed-gas cooled system.Keywords: experimental power reactor, development, RELAP5, steady-state
PRELIMINARY ASSESSMENT OF ENGINEERED SAFETY FEATURES AGAINST STATION BLACKOUT IN SELECTED PWR MODELS Andi Sofrany Ekariansyah; Surip Widodo; Susyadi Susyadi; Hendro Tjahjono
JURNAL TEKNOLOGI REAKTOR NUKLIR TRI DASA MEGA Vol 23, No 2 (2021): June 2021
Publisher : Pusat Teknologi Dan Keselamatan Reaktor Nuklir (PTKRN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/tdm.2021.23.2.6204

Abstract

The 2011 Fukushima accident did not prevent countries to construct new nuclear power plants (NPPs) as part of the electricity generation system. Based on the IAEA database, there are a total of 44 units of PWR type NPPs whose constructions are started after 2011. To assess the technology of engineered safety features (ESFs) of the newly constructed PWRs, a study has been conducted as described in this paper, especially in facing the station blackout (SBO) event. It is expected from this study that there are a number of PWR models that can be considered to be constructed in Indonesia from the year of 2020. The scope of the study is PWRs with a limited capacity from 900 to 1100 MWe constructed and operated after 2011 and small-modular type of reactors (SMRs) with the status of at least under licensing. Based on the ESFs design assessment, the passive core decay heat removal has been applied in the most PWR models, which is typically using steam condensing inside heat exchanger within a water tank or by air cooling. From the selected PWR models, the CPR-1000, HPR-1000, AP-1000, and VVER-1000, 1200, 1300 series have the capability to remove the core decay heat passively. The most innovative passive RHR of AP-1000 and the longest passive RHR time period using air cooling in several VVER models are preferred. From the selected SMR designs, the NuScale design and RITM-200 possess more advantages compared to the ACP-100, CAREM-25, and SMART. NuScale represents the model with full-power natural circulation and RITM-200 with forced circulation. NuScale has the longest time period for passive RHR as claimed by the vendor, however the design is still under licensing process. The RITM-200 reactor has a combination of passive air and water-cooling of the heat exchanger and is already under construction.  
PERILAKU PENCARIAN PENGOBATAN PENDERITA PENYAKIT DIABETES MELITUS (DM) TIPE II KRONIS DI KABUPATEN PRINGSEWU TAHUN 2015 Susyadi Susyadi
JKM (Jurnal Kebidanan Malahayati) Vol 2, No 2 (2016): Volume 2 Nomor 2
Publisher : Program Studi Kebidanan Fakultas Kedokteran Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jkm.v2i2.576

Abstract

Perilaku merupakan suatu kegiatan manusia, dapat dilihat secara langsung maupun tidak langsung, merupakan hasil hubungan antara perangsang (stimulus dan respon). Perilaku ditentukan oleh kepercayaan bahwa mereka rentan terhadap masalah kesehatan tertentu, tingkat keseriusan masalah, meyakini keefektivitasan tujuan pengobatan dan pencegahan, biaya pengobatan tidak mahal serta menerima anjuran untuk mengambil tindakan kesehatan.DM merupakan suatu sindromagangguan metabolisme dengan hiperglikemia yang tidak semestinya sebagai akibat defisiensi sekresi insulin atau berkurangnya efektivitas biologis dari insulin atau keduanya. Dua tipe DM yaitu Insulin Dependent Diabetes Melitus (IDDM) dan Non Insulin Dependent Diabets Melitus (NIDDM). DM digolongan menjadi 4; Tipe I dan II, Gestasional, dan tipe lain.Permasalahan penelitian adalah belum diketahuinya perilaku pencarian layanan pengobatan penderita DM tipe II kronis di Kabupaten Pringsewu tahun 2015. Penelitian bertujuan mengetahui gambaran kerentanan,  keseriusan terhadap masalah, gambaran manfaat, rintangan serta peran keluarga dalam pencarian layanan pengobatan serta faktor yang mempengaruhi perilaku pencarian layanan pengobatan.Penelitian menggunakan metode kualitatif dengan melakukan wawancara mendalam pada 4 informan tidak teratur berkunjung ke pelayanan kesehatan (Nakes) dan 4 orang keluarganya, 3 informan teratur berkunjung ke Nakes dan 3 informan keluarganya serta 1 orang bidan desa.Hasil penelitian menunjukan bahwa informan tidak teratur ke Nakes menganggap DM bukan masalah yang serius, sedangkan informan teratur menganggap DM merupakan masalah yang serius. Rintangan dalam mencari pengobatan (jarak dan biaya) tidak menjadi permasalahan, menjadi permasalahan proses pengobatan adalah sedikitnya pemberian obat. Keluarga mendukung melakukan pencarian layanan pengobatan.Peneliti menyarankan meningkatan dan mengembangkan program promosi kesehatan serta penatalaksanaan DM. Kata kunci : Perilaku Pencarian Pengobatan, Diabetes Melitus
Co-Authors Andi Sofrany Ekariansyah Andi Sofrany Ekariansyah Anwar Budianto Hendro Tjahjono Muhammad Subekti Puradwi Ismu Wahyono Surip Widodo