Scalability of the LEU-Modified Cintichem Process [electronic resource] : 3-MeV Van de Graaff and 35-MeV Electron Linear Accelerator Studies

• Ngôn ngữ: eng
• Ký hiệu phân loại: 543.5 Optical spectroscopy (Spectrum analysis)
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. National Nuclear Security Administration ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2016
• Mô tả vật lý: Size: 52 p. : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 268095
• Chủ đề: 1. 38 radiation chemistry, radiochemistry, and nuclear chemistry; 2. Electrons; 3. Mev range 01-10; 4. Mev range 10-100; 5. Molybdenum 99

Tóm tắt

 Molybdenum-99, the mother of Tc-99m, can be produced from fission of U-235 in nuclear reactors and purified from fission products by the Cintichem process, later modified for low-enriched uranium (LEU) targets. The key step in this process is the precipitation of Mo with ?-benzoin oxime (ABO). The stability of this complex to radiation has been examined. Molybdenum-ABO was irradiated with 3 MeV electrons produced by a Van de Graaff generator and 35 MeV electrons produced by a 50 MeV/25 kW electron linear accelerator. Dose equivalents of 1.7?31.2 kCi of Mo-99 were administered to freshly prepared Mo-ABO. Irradiated samples of Mo-ABO were processed according to the LEU Modified-Cintichem process. The Van de Graaff data indicated good radiation stability of the Mo-ABO complex up to ~15 kCi dose equivalents of Mo-99 and nearly complete destruction at doses >
 24 kCi Mo-99. The linear accelerator data indicate that even at 6.2 kCi of Mo-99 equivalence of dose, the sample lost ~20% of Mo-99. The 20% loss of Mo-99 at this low dose may be attributed to thermal decomposition of the product from the heat deposited in the sample during irradiation.