Kai Krycki
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View article: Numerical Robustness of PINNs for Multiscale Transport Equations
Numerical Robustness of PINNs for Multiscale Transport Equations Open
We investigate the numerical solution of multiscale transport equations using Physics Informed Neural Networks (PINNs) with ReLU activation functions. Therefore, we study the analogy between PINNs and Least-Squares Finite Elements (LSFE) w…
View article: Numerical solution of a parameter estimation problem arising in Prompt-Gamma Neutron Activation Analysis
Numerical solution of a parameter estimation problem arising in Prompt-Gamma Neutron Activation Analysis Open
We study a parameter estimation problem which arises from measurements with QUANTOM, a measurement facility utilizing Prompt-Gamma Neutron Activation Analysis (PGNAA) to analyze elemental masses in 200-l nuclear waste drums. The presence o…
View article: PGNAA Spectral Classification of Aluminium and Copper Alloys with Machine Learning
PGNAA Spectral Classification of Aluminium and Copper Alloys with Machine Learning Open
In this paper, we explore the optimization of metal recycling with a focus on real-time differentiation between alloys of copper and aluminium. Spectral data, obtained through Prompt Gamma Neutron Activation Analysis (PGNAA), is utilized f…
View article: Non-destructive verification of materials in waste packages using QUANTOM<sup>®</sup>
Non-destructive verification of materials in waste packages using QUANTOM<sup>®</sup> Open
The nuclear and non-nuclear industry has produced a considerable amount of low and intermediate-level radioactive wastes during the last decades. The material characterization of waste packages recently became more and more important in or…
View article: PGNAA Spectral Classification of Metal with Density Estimations
PGNAA Spectral Classification of Metal with Density Estimations Open
For environmental, sustainable economic and political reasons, recycling processes are becoming increasingly important, aiming at a much higher use of secondary raw materials. Currently, for the copper and aluminium industries, no method f…
View article: "Prompt-Gamma Neutron Activation Analysis (PGNAA)" Metal Spectral Classification using Deep Learning Method
"Prompt-Gamma Neutron Activation Analysis (PGNAA)" Metal Spectral Classification using Deep Learning Method Open
There is a pressing market demand to minimize the test time of Prompt Gamma Neutron Activation Analysis (PGNAA) spectra measurement machine, so that it could function as an instant material analyzer, e.g. to classify waste samples instanta…
View article: Partial Cross-Section Calculations for PGNAA Based on a Deterministic Neutron Transport Solver
Partial Cross-Section Calculations for PGNAA Based on a Deterministic Neutron Transport Solver Open
The measurement facility QUANTOM is being developed for the material analysis of radioactive waste packed up in 200-L drums. QUANTOM enables a spatially resolved elemental analysis based on prompt gamma neutron activation analysis. The eva…
View article: QUANTOM − Non-destructive scanning of waste packages for material characterization
QUANTOM − Non-destructive scanning of waste packages for material characterization Open
For the final disposal of radioactive waste, the waste packages have to meet the acceptance requirements defined by national licensing and supervisory authorities. Non-destructive methods are very much preferred over destructive methods fo…
View article: Sensitivity analysis for dose deposition in radiotherapy via a Fokker–Planck model
Sensitivity analysis for dose deposition in radiotherapy via a Fokker–Planck model Open
In this paper, we study the sensitivities of electron dose calculations with respect to stopping power and transport coefficients. We focus on the application to radiotherapy simulations. We use a Fokker-Planck approximation to the Boltzma…
View article: Nonclassical Particle Transport in the 1-D Diffusive Limit
Nonclassical Particle Transport in the 1-D Diffusive Limit Open
This paper provides numerical results that demonstrate the validity of the nonclassical diffusion approximation to the nonclassical transport equation in certain 1-D diffusive systems. This result provides a more solid foundation in which …