کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1729067 1521154 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Alternative definitions of kinetic parameters for accelerator driven systems
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
Alternative definitions of kinetic parameters for accelerator driven systems
چکیده انگلیسی

This study introduces a new formulation of kinetic parameters for accelerator driven systems and it is structured into two parts. The first part is dedicated to the classic definition of the kinetic parameters and compares different calculation methodologies. The second part considers a new definition of the kinetic parameters for subcritical assemblies, with particular emphasis on the delayed neutron fraction and the prompt neutron lifetime. This new definition takes into account neutrons from the external neutron source and (n, xn) reactions, which increase the fraction of prompt neutrons.The developed theoretical framework has been applied by Monte Carlo and deterministic calculations to the YALINA Thermal subcritical assembly located in Belarus. This facility can be driven by californium, deuterium–deuterium (D–D), or deuterium–tritium (D–T) external neutron sources. For the D–T neutron source, (n, xn) reactions must be taken into account in order to produce accurate results because the average energy of D–T source neutrons is 14.1 MeV, a value which is much higher than the threshold energy of the (n, 2n) cross section of uranium isotopes.


► New definition of kinetic parameters for accelerator driven systems.
► Difference between effective and average delayed neutron fraction.
► Difference between effective and average prompt neutron lifetime.
► Effect of the neutron source (Cf, D–D, D–T) on ksrc.
► Effect of the (n, xn) reactions and source energy-angle distribution on ksrc.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Annals of Nuclear Energy - Volume 44, June 2012, Pages 12–21
نویسندگان
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