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"Telah dilakukan Penentuan Recovery dan Limit Deteksi Unsur Kadmium, Kobalt, Tembaga, Mangan, Nikel, Molibdenum dan Timbal pada Uranium Oksida Menggunakan Spektrofotometer Serapan Atom - flame yang didahului dengan proses ekstraksi menggunakan TBP, TBP + CCL4 20 % dan CCL4. Validasi metode dilakukan untuk menentukan unjuk kerja suatu metode pengujian yang dikembangkan diantaranya perolehan kembali (recovery) dan limit deteksi. Penelitian ini bertujuan menentukan perolehan kembali (recovery) dan limit deteksi unsur Cd, Co, Cu, Mn, Ni, Mo dan Pb dalam Uranium Oksida (U3O8) menggunakan alat spektrofotometer serapan atom - flame yang didahului dengan proses ekstraksi menggunakan TBP, TBP + CCL4 20 % dan CCL4. Pada penelitian ini Uranium Oksida dilarutkan dengan HNO3, dilakukan ekstraksi menggunakan TBP, TBP + CCl4 20 % dan CCL4, selanjutnya fase air dalam asam encer dianalisis menggunakan SSA ? flame, recovery ditentukan dengan metode adisi (spike). Diperoleh persentase recovery antara 81,84 % hingga 113 %, penurunan persentase recovery menunjukkan adanya kehilangan analit selama berlangsungnya proses preparasi, kenaikan persentase recovery menandakan adanya penambahan analit yang berasal dari pelarut atau ekstraktan selama proses preparasi. Limit deteksi pengujian yang diperoleh adalah antara 0,0021 mg/L dan 0,8998 mg/L, lebih tinggi dibanding limit deteksi instrumen.Studies on the determination recovery and detection limit of Cadmium, Cobalt, Copper, Manganese, Nickel, Molybdenum and Lead in Uranium Oxide using Atomic Absorption Spectrophotometer - Flame are described. A method developed should be validated to verify its performance parameter. The studies aim to determine the recovery and detection limit of Cadmium, Cobalt, Copper, Manganese, Nickel, Molybdenum and Lead in Uranium Oxide using Atomic Absorption Spectrophotometer ? Flame. In this study, the bulk of the matrix is dissolved with nitric acid and separated by batch extraction using TBP, TBP +CCl4 20 % and CCL4. The final aqueous phase containing the metallic impurities is fed to AAS ? flame, the recovery is determined by spike method. It is found that the recovery for various elements is in range 81,84 % - 113 % while the limit of detection for various elements is in range 0.0021 mg/L ? 0.8998 mg/L."

"The influence of U3 O8 and U3 Si2 powder diffrence toward the formation of porosity, uranium homogeneity and cladding thickness of U3 O8 -Al and U3 Si2 - Al fuel plate product. Research of raw material influence of U3 O8 and U3 Si2 in the making of U3 O8 - Al and U3 Si2 - Al fuel plate has been conducted. The U3 O8 represent result of the amonium uranil carbonate calcination process, while U3 Si2 powder result by milling ingot U3 Si2 (U - 7,5 w%)...."

"In Mentawa areas there are indications that the U mineralization associated with tourmaline, quartz, sulfide minerals that fill the fracture aperture, on the rocks metasilt, and filit with the direction of WNW-ESE, the thickness milimetric-centrimetic with radioactivity 500-15000 c/s SPP 2 NF. The purpose of this study is to know the characters, parageneses and the process of formation of uranium minerals. The method used by microscopic observation of several examples of thin sections and polished sections of the previous research results. The study shows that uranium minerals are uraninite, associated with molybdenite, magnetite, rutile, ilmenite, pyrite, pyrrhotite, tourmaline, garnet, quartz and mineral pikblende associated with arsenopyrite, covelite, hematite, chalcopyrite, pyrite, pyrrhotite, tourmaline, quartz fill in cracks in rocks biotite and biotite schist. Mineral associations indicate that the process of formation of uranium mineralization occurs in three phases: pegmatik pneumatolitik, and hydrothermal alteration."

"The influence of the urea and HMTA as additives, time and temperature reduction on UO2 kernel specification has been studied. UO2 kernel was made up by totla gelation process uranium (TGU). Uranyl nitrate,urea, HMTA, polyvinyl alcohol (PVA) and tetra hidrofurfural (THF),were used as base materials..."