The results of model calculations on nuclide yields produced in selected scenarios using reactions with U nuclei are presented. The calculation combines the modelling of the initial reaction mechanism, the deexcitation process including the fission competition with the prediction of the nuclide production in the fission of excited U and all daughter nuclei produced in the evaporation cascade. T...

Computing in the energy dimension is one of greatest challenges confronting present-day deterministic neutron transport solvers. Accurately resolving flux as neutrons downscatter across resonances nuclear cross sections currently requires considerable computing power and suffers from approximation errors. Flux uncertainty resulting resonance structure single-largest cause reactivity uncertainty...

P. M. Ostrovsky, I. V. Gornyi, 3 and A. D. Mirlin 4, 5 1 Institut für Nanotechnologie, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany 2 L. D. Landau Institute for Theoretical Physics RAS, 119334 Moscow, Russia 3 A.F. Ioffe Physico-Technical Institute, 194021 St. Petersburg, Russia 4 Institut für Theorie der kondensierten Materie, Karlsruhe Institute of Technology, 76128 Karlsruhe, ...

Global macroscopic features observed in the fully-damped binary processes in light di-nuclear systems, such as limiting angular momenta, mean total kinetic energies and energy thresholds for fusion-fission processes (”fission thresholds”) are presented. Their deduced systematics are consistent with that obtained for heavier systems and follow a fusion-fission picture which can be described by a...

This paper describes a novel methodology for the analysis of nuclear criticality excursions in fissile powder beds under wetting conditions. These potentially hazardous powder, slurry and sludge systems may be found fuel manufacturing fabrication facilities. A point neutron kinetics model was coupled with water infiltration, thermal–hydraulics radiolysis models through use reactivity feedbacks....

Nuclear fission is still one of the most complex physical processes we can observe in nature due to interplay macroscopic and microscopic nuclear properties that decide result. An example this coupling presence dissipation as an important ingredient contributes drive dynamics has a clear impact on time process. However, different theoretical interpretations, scarce experimental data make it poo...

Nuclear fission has been used as a reliable source for utility power in the United States for decades. Even in the 1940’s, long before the United States had a viable space program, the theoretical benefits of nuclear power as applied to space travel were being explored [Humble, et. al.]. These benefits include long-life operation and high performance, particularly in the form of vehicle power d...

The cross section for the neutron-induced fission of 238 U nuclei has been measured using time-of-flight spectrometer GNEIS neutron complex at Petersburg Nuclear Physics Institute, National Research Center Kurchatov in energy range 0.3–500 MeV. Fission fragments have detected by low-pressure position-sensitive multiwire proportional counters. U( n , f ) with respect to 235 fission, which is an ...