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NEUTRONIC AND THERMAL HYDRAULICS ANALYSIS OF CONTROL ROD EFFECT ON THE OPERATION SAFETY OF TRIGA 2000 REACTOR Pinem, Surian; Surbakti, Tukiran; Kuntoro, Iman
Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol 25, No 3 (2019): Oktober, 2019
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (500.016 KB) | DOI: 10.17146/urania.2019.25.3.5576

Abstract

NEUTRONIC AND THERMAL HYDRAULICS ANALYSIS OF CONTROL ROD EFFECT ON THE OPERATION SAFETY OF TRIGA 2000 REACTOR. Analysis of neutronic and thermal-hydraulics parameters of whole operation cycle is very important for the safety of reactor operation. During the reactor operation cycle, the position of the control rods will change due to reactivity changes. The purpose of this study is to determine the effect of control rods position on neutronic and thermal-hydraulics parameters in relation to the safety of reactor operation of the TRIGA 2000 reactor using silicide fuel of MTR plate type. Those parameters are power peaking factor, reactivity coefficients, and steady-state thermohydraulic parameters. Neutronic calculations are performed using a combination of WIMSD/5 and Batan-3DIFF codes and for thermal-hydraulics the calculations are done using WIMSD/5 and MTRDYN codes. The calculation results show that the reactivity coefficient values are negative for all control rod positions both at CZP and HFP conditions. The MTC value decreases when the control rod is inserted into the active core while the FTC value increases. The total ppf results and temperature in steady-state rise when the control rods are inserted of into the active core whereby the maximum value occurs at the position of the control rods of 20 cm from the bottom of the active core. The calculation results of ppf, reactivity coefficient, and thermal-hydraulics parameters lay below safety limits, indicating that the TRIGA 2000 reactor can safely use U3Si2-Al silicide fuel as a substitute fuel for cylindrical type fuel.Keywords: neutronic, thermal-hydraulic parameter, control rod effect, TRIGA 2000, silicide fuel.
Core Design TRIGA2000 Bandung Using U3Si2Al Fuel Element MTR Type Pinem, Surian; Surbakti, Tukiran; Sembiring, Tagor M.
Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol 24, No 2 (2018): Juni, 2018
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/urania.2018.24.2.4302

Abstract

DESAIN TERAS REAKTOR TRIGA2000 BANDUNG MENGGUNAKAN TIPE ELEMEN BAKAR MTR U3Si2/Al. Reaktor TRIGA2000 Bandung selama ini menggunakan bahan bakar jenis silinder tetapi bahan bakar tersebut tidak diproduksi lagi. Upaya yang dilakukan agar reaktor TRIGA2000 dapat beroperasi secara kontinu maka direncanakan pergantian bahan bakar jenis silinder ke U3Si2/Al jenis MTR karena Indonesia dapat memprodusi bahan bakar tersebut. Dalam penelitian ini telah dilakukan perhitungan desain teras reaktor TRIGA2000  menggunakan bahan bakar MTR jenis U3Si2/Al dengan tiga densitas bahan bakar yang berbeda. Kegiatan ini dimulai dengan melakukan generasi tampang lintang makroskopik neutron untuk semua bahan teras sebagai fungsi temperatur, fraksi bakar dan xenon. Generasi tampang lintang dilakukan dengan program WIMSD5. Perhitungan parameter teras reaktor dilakukan dengan program Batan-FUEL. Berdasarkan hasil perhitungan parameter neutronik ada tiga kemungkinan konfigurasi teras yaitu 16 elemen bakar dan 4 elemen kendali (Core 16/4), teras dengan 14 elemen bahan bakar dan 4 elemen kendali (Core 14/4) dan teras dengan 12 elemen bahan bakar dan 4 elemen kendali (Core 12/4). Ketiga konfigurasi teras ini memenuhi batasan keselamatan operasi tetapi hanya Core 16/4 yang dapat menggunakan bahan bakar U3Si2/Al dengan kepadatan 2,96 g/cm3. Fluks neutron termal maksimum di pusat teras adalah 5,874 × 1013 n/cm2s dan panjang siklus adalah 310 hari pada daya 2 MW. Hasil perhitungan menunjukkan bahwa teras TRIGA2000 dapat dikonversi dari bahan bakar jenis silinder menjadi bahan bakar silisida jenis MTR.Kata kunci: bahan bakar jenis silinder, bahan bakar jenis MTR, Batan-FUEL, fluks neutron termal.
Co-Authors Iman Kuntoro Tagor M. Sembiring, Tagor M. Tukiran Surbakti