ILT20 – an Upgraded Computer Program for Evaluation of Accelerated Leach Test Data of LLW in the Hungarian NPP Paks

Authors

  • György Pátzay
    Affiliation
    Department of Industrial Safety, Institute of Disaster Management, Faculty of Law Enforcement, National University of Public Service, H-1083Budapest, 2 Ludovika tér, Hungary
  • János Nyőgér
    Affiliation
    Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1111 Budapest, 3 Műegyetem rkp., Hungary
  • Ottó Zsille
    Affiliation
    Somos Ltd, H-1031 Budapest, 141 Szentendrei út, Hungary
  • József Csurgai
    Affiliation
    Department of Industrial Safety, Institute of Disaster Management, Faculty of Law Enforcement, National University of Public Service, H-1083Budapest, 2 Ludovika tér, Hungary
  • Ferenc Feil
    Affiliation
    MVM Paks Nuclear Power Plant, H-7031 Paks, P. O. B. 71, Hungary
  • Gyula Vass
    Affiliation
    Department of Industrial Safety, Institute of Disaster Management, Faculty of Law Enforcement, National University of Public Service, H-1083Budapest, 2 Ludovika tér, Hungary
  • Lajos Kátai Urbán
    Affiliation
    Department of Industrial Safety, Institute of Disaster Management, Faculty of Law Enforcement, National University of Public Service, H-1083Budapest, 2 Ludovika tér, Hungary
  • József Dobor
    Affiliation
    Department of Industrial Safety, Institute of Disaster Management, Faculty of Law Enforcement, National University of Public Service, H-1083Budapest, 2 Ludovika tér, Hungary
https://doi.org/10.3311/PPch.18137

Abstract

Computer Program ILT15 was earlier developed to accompany a new leach test for solidified radioactive waste forms in the Hungarian NPP Paks. The program was designed to be used as a tool for performing the calculations necessary to analyze leach test data, a modelling program to determine if diffusion is the operating leaching mechanism (and, if not, to indicate other possible mechanisms), and a means to make extrapolations using the diffusion models. The program uses computational algorithm of ASTM C1308 standard. Now we have developed another computational algorithm based on a Partial Differential Equation (PDE) of a cylindrical specimen, solved the PDE by a Crank-Nicolson Finite Difference Method (FDM) and calculated by integration the eluted amount of a given component in time. The new solution more accurate method was integrated into the existing ILT15 computer program and the resulting new ILT20 program is able to calculate the Incremental/Cumulative Fraction Leached IFL/CFL) either by ASTM or PDE numerical solution methods.
ILT20 program is written in C++ in the Borland C++ Builder programming environment. A detailed description of application of this upgraded modelling computer program is given.

Keywords:

accelerated leach test, computer program, Partial Differential Equation (PDE), Finite Difference Method (FDM), diffusion, fitting, cylinder

Citation data from Crossref and Scopus

Published Online

2021-08-26

How to Cite

Pátzay, G., Nyőgér, J., Zsille, O., Csurgai, J., Feil, F., Vass, G. “ILT20 – an Upgraded Computer Program for Evaluation of Accelerated Leach Test Data of LLW in the Hungarian NPP Paks”, Periodica Polytechnica Chemical Engineering, 65(4), pp. 550–558, 2021. https://doi.org/10.3311/PPch.18137

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