PERANCANGAN KOLAM BAHAN BAKAR BEKAS AP1000 DENGAN SISTEM PENDINGINAN PASIF

nuclear reactor now One of the most current adays is III generation reactor. One of III + generation reactor is PWR Advanced Passive 1000 (AP1000). AP1000 uses passive system for the core and active system for the spent fuel pool storage. The main purpose of this study is to analyze and optimize variable parameter and geometry to get the design of AP1000 spent fuel pool storage with passive cooling system. The data specification for modeling is adapted from AP1000 specification.The main reasearch of this study is to design a heat exchanger that can passively cools the spent fuel pool without any aid of pumps. The heat exchanger model has parallel pipeline with hot fluid and cold fluid in counter flow. The material used for heat exchanger modeling is made of stainless steel with variation of 1 inch, 1.5 inch, and 2 inch Sch.40 pipe diameter, and the number of the tube varies in 27000 and 30000 with air mass flow rate 0.05 kg/s. From the conducted analysis, the heat exhanger length, the different altitude and the height of chimney are obtained. The length of heat exchanger, the altitude, and the chimney become smaller with the increasing of pipe diameter used. The higher the number of pipe used, the smaller the altitude and the heat exhanger length needed

PERANCANGAN SISTEM PENDINGIN SOLAR THERMAL POWER PLANT 250 KW

Solar Thermal Power Plant is a power plant which converts solar heat as heat source to be used by working fluids. Solar Thermal Power Plant system consists of 3 main parts, heat collector, turbine, and cooling system. Designing cooling system for Solar Thermal Power Plant is important to make sure the condensing process of exhaust steam from turbine. The components of cooling system from Solar Thermal Power Plant are condenser, cooling tower, and two pumps.The design of cooling system for Solar Thermal Power Plant 250 kW using direct-contact type condenser to condense exhaust steam. Designing and calculations have been made to determine the length of contact from droplets and exhaust steam in condenser at constant pressure. While in the cooling tower design, calculations are made to determine cooling loads and the influence of wind speed inside cooling tower to its performance. Based on calculation, the length of contact from droplets and exhaust steam in condenser are 3.7 m with 500 microns droplet diameter, and 4.53 m in the cooling tower length for 1200 microns droplet diameter. And the total power required for cooling system in Solar Thermal Power Plant is 13.9 kW

ANALISIS DISTRIBUSI DOSIS RADIASI PADA TERAPI KANKER PAYUDARA DENGAN BORON NEUTRON CAPTURE THERAPY (BNCT) MENGGUNAKAN MCNP5

Boron Neutron Capture Therapy (BNCT) is therapy that utilizes the interaction of neutron with boron-10 to kill cancer cells. Boron Neutron Capture Therapy (BNCT) is currently being developed for the treatment of HER-2+ breast cancer. HER-2+ breast cancer is resistant and have a chance of recurrence. The purpose of this study is to research about dose distribution for treatment HER-2+ breast cancer. This study used MCNP 5 simulation program to calculate the thermal neutron flux on the cancer and the health tissue so absorbed dose can be calculated. Concentration of boron-10 was varied into 20, 30, 40, 50, 60 and 70 �g/g, while variations on irradiation technique were en face technique and lateral technique. The result showed dose rate on the tumor volume increased and shorter irradiation times with increasing concentration of boron-10. So skin dose and lungs dose were reduced. En face technique gives the treatment time is shorter than lateral technique. Dose distribution in the concentration of boron-10 70 �g/g by en face technique received by skin, CTV, cancer, health tissue and lungs, respectively, 0.86 G

SIMULASI DINAMIKA REAKTOR TITIK UNTUK REAKTOR PRODUKSI ISOTOP BERBAHAN BAKAR CAIR (LFIPR) BERBAHAN BAKAR URANIL NITRAT

Liquid-Fueled Isotope Production Reactor (LFIPR) is one of Aqueous Homogeneous Reactor (AHR)-typed reactors being developed. Modelling and simulation of reactor dynamics play important roles in achieving insight regarding responses of the design for implementations during operation. Utilizing point reactor approximation, research on reactor dynamics of LFIPR has been performed. The main purpose o f the research was developing simulator and simulating point reactor dynamics of uranyl nitrate fuel-based LFIPR on burnup level of 0 MWd/t (Begin of Life, BOL), 20677.5 MWd/t (Middle of Life, MOL), and 41355 MWd/t (End of Life, EOL). The reactor dynamics model comprises two groups point reactor kinetics (thermal and fast neutron fluxes, 6 delayed neutron precursor group and 4 neutron poison with the parent concentrations, and fuel and coolant temperatures), feedback and control of kinetic properties (reactivity, average neutron lifetime, macroscopic cross sections, and diffusion coefficient), and kinetic properties. Simulation with its initial condition and kinetic parameters are provided for burnup level of BOL, MOL, and EOL. The track ed neutron poisons are xenon-135 and samarium-149. Numerical model of reactor kinetics is solved using Runge-Kutta-Fehlberg 45 (RKF45). Reactor core kinetic properties are obtained by utilizing PIJ and CITATION code in SRAC2006 code package. Feedback parameters (temperature, void, neutron poison coefficient) and control rod parameters (central and peripheral control rod coefficient) are obtained from gradient of polinomial regression model between kinetic property and related parameters. Burnup levels are obtained by utilizing BURN code in SRAC2006 code package. Overall heat transfer coefficient is assumed to be 1000 W/m 2 s. Simulator is built in Python programming language. The simulation results show that the reactor dynamic respons toward implementations during simu lation conform with the theory. The simulated implementations comprise insertion of positive and negative step reactivit ies on critical zero power and power level, engineered reactivity accident, shutdown, and loss of coo lant accident

ANALISIS KONSUMSI ENERGI BUS LISTRIK TRAYEK YOGYAKARTA-SURAKARTA

The mobility of modern society requires a supporting component which is capable to meet transportation commmunity activities. Transportation sector, which still relies on fossil fuels also contributes to CO2 pollution that resulting to greenhouse effect. Based on these conditions, this study designed an energy consumption analysis of the electric bus in Yogyakarta-Surakarta route in hopes of becoming the initial idea in the development of mass transportation that is more energy efficient and environmentally friendly in Indonesia. In this study, measurement of driving cycle in Yogyakarta-Surakarta route is performed by using Garmin GPS 76SCX to obtain further parameters for calculation of electric bus energy consumption. Results of electric bus energy consumption calculation will be compared to the ICE bus energy consumption calculation in order to know which type of bus requires less energy. Results of driving cycle masurement in Yogyakarta-Surakarta route was a graph of driving cycles and kinematic parameters such as 135,35 km mileage, 14845 s travel time, 32 km/h average speed, and a maximum speed on 94,93 km/hours. Energy consumption calculation is done by dynamic modeling through driving cycle data to obtain the total energy consumption of bus. The result energy consumption of electric bus was 2,702 to 3,209 KWh / km and the energy consumption of ICE bus was 4,850 kWh / km. These results indicate that the electric buses require less energy than the ICE bus. Keywords: electric bus, ICE bus, driving cycle, energ

ANALISIS KONSUMSI ENERGI, EMISI CO2, DAN STASIUN PENGISIAN BUS LISTRIK (STUDI KASUS BUS TRANS JOGJA JALUR 3A)

Transportation sector is the largest consumer of petroleum which consume 277 million BOE in 2012. Beside that, the increasing of energy needs compared to the availability was unbalance. Improving the quality of public transport is one step that can be done to support the changes of transportation mode from private vehicles into public transits. The provision of electric buses is a solution to overcome these problems because it will reduce the emissions and energy consumption in the city of Yogyakarta. Trans Jogja bus driving cycle is measured using GPSmap 76CSx to obtain parameters that will be used for energy consumption calculation. Energy consumption is determined by dynamic model of electric bus. After that, CO2 emissions calculated and charging system scenario is determined. Data processed into driving cycle graph with 39623 m distance, 7844 s travel time, 18.2 km/h average speed, and 75.6 km/h maximum speed. The calculation result show that the value of energy consumption of electric bus for one cycle of Trans Jogja bus line 3A based on basic scenario, security scenario, and mitigation scenario are 82.74 kWh, 82.55 kWh, and 77.63 kWh. While ICE bus energy consumption is 88.45 kWh. CO2 emission of electric bus based on basic scenario, security scenario, and mitigation scenario are 22.59 kgCO2, 21.46 kgCO2, and 16.85 kgCO2. While CO2 emission for ICE bus is 23.60 kgCO2. In order to fulfill 6 cycles in a day operation it needs Fast DC Charging 100 kW. Keywords� electric bus, ICE bus, driving cycle, energ

KAJIAN PARAMETER PENDINGINAN PASIF PADA SISTEM PENYIMPANAN LIMBAH PRODUK FISI PASSIVE COMPACT MOLTEN SALT REACTOR (PCMSR)

The technology of nuclear waste processing and management have been developed since long ago. Nuclear waste is radioactive that it can not be directly disposed to the environment. Thus, a certain container is needed. This container not only to contain but also distribute heat from radioactive decay. In this research, analysis of PCMSR waste management by using passive cooling system at the waste storage container was conducted. This system can still work without the presence of electricity to water circulate cooling water. To optimize the cooling process, the height of chimney was varied, then a condenser was employed. The results show that the ideal height of chimney was 6 m with -103 kPa of pressure drop in both riser and downcormer, in the generation of heat between 442.76 and 263.80 kW/m3. Compressing salt occurred with the thickness from0.005 to 0.0248 m with a density of heat between 4960 and 295 kW/m3. The right condenser length to produce optimum condensation at 5.62 m

ANALISIS KINERJA SISTEM PENGENDALI LEVEL DI CONDENSER DENGAN IDENTIFIKASI SISTEM KALANG TERTUTUP (STUDI KASUS DI CONDENSER PEMBANGKIT LISTRIK TENAGA PANAS BUMI UNIT IV PT.PERTAMINA GEOTHERMAL ENERGY AREA KAMOJANG)

System Identification is a method for determining the dynamic model of a system from input and output measurements of the system. Knowing a model system is needed to design and implement control systems with optimal performance. System identification is an experimental approach for determining the dynamic model of a system. Based on the results of closed-loop identification with algorithm closed-loop output error (CLOE) condenser system plant model is obtained and the control valve is of second order system. Analysis of responses transient and steady state of model in a closed loop system with exciting controller in the plant showed a fast oscillating with a settling time 4.28 seconds, peak time 3.58 seconds, rise time 0.756 seconds and no error steady state. Re-tuning control system gives the best results in response system using proportional-integral controller (PI) with the principle of ISE. The aim of re-tuning is to find the controllers constant that provides optimum performance and gives safety of the system especially in the actuator and the final element. Simulation results using MATLAB software shows the settling time of 24.7 seconds, peak time 3.57 seconds, rise time of 1.03 seconds and no steady state error occured. Controller constants the results of the re-tuning proportional band (K) is 260.34%, integral time (Ti) is 0.36 seconds and the time derivative (Td) 0 seconds