ILT20 – an Upgraded Computer Program for Evaluation of Accelerated Leach Test Data of LLW in the Hungarian NPP Paks
-
Published:2021-08-26
Issue:4
Volume:65
Page:550-558
-
ISSN:1587-3765
-
Container-title:Periodica Polytechnica Chemical Engineering
-
language:
-
Short-container-title:Period. Polytech. Chem. Eng.
Author:
Pátzay György,Nyőgér János,Zsille Ottó,Csurgai József,Feil Ferenc,Vass Gyula,Kátai Urbán Lajos,Dobor József
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.
Publisher
Periodica Polytechnica Budapest University of Technology and Economics
Subject
General Chemical Engineering