Title: Accelerated leach test for low-level radioactive waste forms in the Hungarian NPP Paks

Authors: György Pátzay; Ottó Zsille; Jozsef Csurgai; Gyula Vass; Ferenc Feil

Addresses: Budapest University of Technology and Economics, Budafoki u 8.,1111 Budapest, Hungary ' SOMOS Environmental Protection Development Service and Trading Ltd., Sasadi u 70., 1118 Budapest, Hungary ' National University of Public Service, H-1083 Budapest, Ludovika tér 2, Hungary ' National University of Public Service, H-1083 Budapest, Ludovika tér 2, Hungary ' MVM Paks Nuclear Power Plant Ltd., H-7030 Paks, Hungary

Abstract: An accelerated leach test method was used for low-level radioactive evaporator residue waste forms in the Hungarian NPP Paks. Experiments were performed using cylinders prepared form Hungarian cement type CEM I 32, 5 LH and CEM III/B 32, N-LH/SR. Each cylinder was made using cement or cement plus additive using radioactive evaporator residue waste water. The cemented radioactive material was evaporator bottom residue, containing 134Cs, 137Cs and 60Co as main radioactive components. Leach tests were performed according to ASTM C 1308-08 standard. A computer program (ILT15) associated with the accelerated leach test was developed based on the ASTM C 1308-08 standard. Literature test and measured leaching data were analysed to assess whether the model for diffusion from a finite cylinder describes leaching from cement based waste forms. In this paper some of the experimental and modelling works used to validate the test method are presented.

Keywords: radioactive waste; leach test; cement; computer program; diffusion.

DOI: 10.1504/IJEWM.2019.103105

International Journal of Environment and Waste Management, 2019 Vol.24 No.3, pp.302 - 312

Received: 19 Dec 2017
Accepted: 25 Dec 2018
Published online: 15 Oct 2019 *

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