Recent developments in PSI BEPU analysis for SPERT-III RIA transient: ND uncertainty breakdown and kinetic parameters uncertainty assessment
نویسندگان
چکیده
• Best-Estimate-Plus-Uncertainty analysis of SPERT-III RIA experiments. Nuclear Data uncertainty propagation in CASMO down to SIMULATE-3K. Identify dominant nuclear data contributors overall uncertainty. Impact cross-section perturbation the resonance self-shielding calculation. kinetic parameters’ uncertainties. The current research summarizes recent developments performed within PSI BEPU methodology and corresponding results on In this regard, three main studies have been carried out. First, an breakdown study has order identify quantify their respective contributions uncertainties parameters interest. On other hand, second was devoted assess impact considering effect cross section (limited for time being U-238 capture) calculation, known as implicit effect, different transient. Finally, third conducted with goal parameter uncertainties, such delayed neutron yields associated decay constants, quantification first study, based ENDF/B-VII.1 library, showed that, steady-state, contributor static reactivity worth k-eff is U-235 nubar, followed by then capture sections. However, transient, e.g. total power reactivity, inelastic scattering. More interestingly, it found contribution uncertainty, during initial excursion phase, due while reversal becomes contribution, even one end Moreover, demonstrated a clear systematic decrease all inclusion effect. steady state, Doppler coefficient relative could be reduced up 30%, which reflected especially phase where plays key role, parameters. estimated regarding both steady-state transient parameters, shown larger values compared those data.
منابع مشابه
Uncertainty and Uncertainty Management in EFL Translators
This study tried to examine EFL translators’ uncertainty and uncertainty management strategies through employing think aloud procedures. The participants of this study were some MA andBA translators selected from several universities in Iran. To this aim, a proficiency test was firstly administered among the volunteers. Then, think aloud protocol and retrospective interview were used to collect...
متن کاملPrediction uncertainty estimation despite unidentifiability : an overview of recent developments
One of the most important properties of a mathematical model is the ability to make predictions: to predict that which has not yet been measured. Such predictions can sometimes be obtained from a simple simulation, but that requires that the parameters in the model are known from before. In biology, the parameters are usually both not known from before and not identifiable, i.e. the parameter v...
متن کاملUncertainty Quantification for Kinetic Equations
Kinetic equations contain uncertainties in their collision kernels or scattering coefficients, initial or boundary data, forcing terms, geometry, etc. Quantifying the uncertainties in kinetic models have important engineering and industrial applications. In this article we survey recent efforts in the study of kinetic equations with random inputs, including their mathematical properties such as...
متن کاملUncertainty Analysis of Spillway Erosion Parameters
Windows Dam Analysis Modules (WinDAM) is a set of modular software components that can be used to analyze overtopped earthen embankments and internal erosion of dams. WinDAM is being developed in stages. The initial computational modules address routing of floods through the reservoir with dam overtopping and evaluation of the potential for vegetation or riprap to delay or prevent failure of th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Engineering and Design
سال: 2021
ISSN: ['0029-5493', '1872-759X']
DOI: https://doi.org/10.1016/j.nucengdes.2021.111378