[en] The process of conversion of UF₆ to U0₂ through Integrated Dry Route (IDR) is done in a rotary kiln reactor. There are two stages of initial treatment / conditioning before inserting the UF₆ in to the reactor: changing UF₆ solid into the gas phase at a temperature of 60°C in an evaporator, and then, raising The temperature of UF₆ gas from 60°C to 290°C in a Heat Exchanger (HE). Therefore it is necessary to design a HE for heating UF6 gas by determination / calculation of HE specifications as a heater. The steps activities of determining the specifications of HE in the following sequence: determining the value of the heat load Q, determining the approximate dimensions of the Heal Exchanger. determining the dimensions / specifications corrected Heat Exchanger, HE pressure drop calculation. The result of this design specification is a type of hairpin double pipe HE with a length of 12ft, 2 x I ¼ IPS. Pipe material is Inconel (alloy -600) that is resistant to UF₆> HF, and Steam. Annulus material carbon steel. Pressure drop in annulus is 0.0004 psi, and in innerpipe is 0.042 psi. Heat Exchanger with specs like this can function as UF₆ gas heater so that the temperature be 290°C. (author)

[en] Data and information collection aimed in order to meet the needs of the initial design for pilot plant of monazite processing into thorium oxide (ThO_2). The content of thorium in monazite is high in Indonesia between 2.9 to 4.1% and relatively abundant in Bangka Belitung Islands. Thorium can be used as fuel because of its potential is more abundant instead of uranium. Plant of thorium oxide commercially from monazite established starting from pilot uranium. Plant of thorium oxide commercially from monazite established starting from pilot plant in order to test laboratory data. Pilot plant design started from initial design, basic design, detailed design, procurement and construction. Preliminary design needs includes data feed and products, a block diagram of the process, a description of the process, the determination of process conditions and type of major appliance has been conducted. (author)

[en] The process of conversion of UF₆ to UO₂ through Integrated Dry Route (IDR) is done in a rotary kiln reactor. There are two stages of initial treatment / conditioning before inserting the UF₆ in to the reactor: changing UF₆ solid into the gas phase at a temperature of 60°C in an evaporator, and then, raising the temperature of UF₆ gas from 60°C to 290°C in a Heat Exchanger (HE). Therefore it is necessary to design a HE for heating UF₆ gas by determination / calculation of HE specifications as a heater. The steps activities of determining the specifications of HE in the Following sequence: determining the value of the heat load Q, determining the approximate dimensions of the Heat Exchanger, determining the dimensions / specifications corrected Heat Exchanger, HE pressure drop calculation. The result of this design specification is a type of hairpin double pipe HE with a length of 12 ft, 2 x 1 ¼. IPS. Pipe material is Inconel (alloy -600) that is resistant to UF₆, HF, and Steam. Annulus material is carbon steel. Pressure drop in annulus is 0.0004 psi, and in inner pipe is 0.042 psi. Heat Exchanger with specs like this can function as UF₆ gas heater so that the temperature be 290°C. (author)

[en] Design activities has been carried out the first stage of the pilot plant processing monazite tailings to ThO₂ which aims to create a pilot plant design documents with the scope of the design process. The document contains a block diagram of the process, a description of the process, the calculation of the mass and energy balance, flow charts qualitative and quantitative, calculation of the main process equipment, process flow diagram (PFD), the initial P & ID and plant plots. The pilot plant is an application of laboratory results data that will be implemented on an industrial scale. Monazite tailings (RE, U, Th) OH is garbage processing monazite (RE, U, Th) PO₄ who has taken most of the rare earth element (RE). Thorium (Th) as radioactive materials, nuclear fuel is used instead of uranium, which is now diminishing reserves, while the reserves of thorium reserves of uranium 3-4 times and have not been processed commercially. The existence of monazite in Indonesia is quite abundant around 1.5 billion tonnes, is currently a lot of monazite sand resulting from the separation of tin by PT. Tin in Bangka Belitung. The content of thorium in monazite sand about 3-6 % and very worthy to be processed. (author)