The selection of immobilization waste technologies based on cementation should demonstrate that the so obtained matrices for packaging systems are reliable, durable and stable. Cementation of radioactive liquid organic wastes (RLOW) is a difficult technological task because of complex chemical composition, and relatively high activity of wastes streams to immobilize. A proper characterization of the cemented matrices is therefore felt necessary. The aim of this study is to investigate numerically, by means of finite element (FE) modelling, the thermo-mechanical behaviour of cementitious material or RLOW simulant. The FE numerical model is adopted to benchmark several RLOW simulants composition and correlate/compare the structural properties. Ageing effects are also investigated. Results are compared to experimental data. They indicate that the thermal conductivity monotonically decreases as the temperature increases. The compressive strength confirmed to be dependent on w/c ratio and to suffer irradiation damage; e.g. it reduces as porosity increases.
Numerical Simulation Of Cemented RLOW For Packaging System
Lo Frano R.
Primo
Conceptualization
;Cancemi S. A.Secondo
;Dolin V.
2022-01-01
Abstract
The selection of immobilization waste technologies based on cementation should demonstrate that the so obtained matrices for packaging systems are reliable, durable and stable. Cementation of radioactive liquid organic wastes (RLOW) is a difficult technological task because of complex chemical composition, and relatively high activity of wastes streams to immobilize. A proper characterization of the cemented matrices is therefore felt necessary. The aim of this study is to investigate numerically, by means of finite element (FE) modelling, the thermo-mechanical behaviour of cementitious material or RLOW simulant. The FE numerical model is adopted to benchmark several RLOW simulants composition and correlate/compare the structural properties. Ageing effects are also investigated. Results are compared to experimental data. They indicate that the thermal conductivity monotonically decreases as the temperature increases. The compressive strength confirmed to be dependent on w/c ratio and to suffer irradiation damage; e.g. it reduces as porosity increases.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
