کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8070128 1521138 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Increasing transcurium production efficiency through directed resonance shielding
ترجمه فارسی عنوان
افزایش بازده تولید ترانسکوریوم از طریق محافظت رزونانس مستقیم
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
The Radiochemical Engineering Development Center at Oak Ridge National Laboratory is the world's leader in production of 252Cf. This and other heavy actinides are produced by irradiation of mixed curium/americium targets in the High Flux Isotope Reactor. Due to the strong dependence of isotopic cross-sections upon incoming neutron energy, the efficiency with which an isotope is transmuted is highly dependent upon the energy spectrum and intensity of the neutron flux. There are certain energy ranges in which the rate of fission absorptions in feedstock materials is reduced relative to the rate of (n, γ) captures. Using a variety of computational models it is shown that by perturbing the flux spectrum, it is possible to alter the net consumption of curium feedstock, as well as the yields of key isotopes for the heavy element research program, such as 249Bk and 252Cf. This flux spectrum perturbation is accomplished by means of focused resonance shielding through the use of filter materials. It is further shown that these perturbations can alter the target yields in a significant way, increasing the amount of 252Cf produced per unit curium consumption by over 40%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Annals of Nuclear Energy - Volume 60, October 2013, Pages 267-273
نویسندگان
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