THE LONG TERM BEHAVIOUR OF WASTE FORMS IN RELATION TO HAZARDOUS WASTE MANAGEMENT

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Abstract

Hazardous waste treatment might involve solidification before landfilling. With time, the strength of the wasteform is expected to decline with the presence of water, leading to an increase in the leaching capacity. It is important to be able to predict the behaviour of these wasteforms in order to protect human health and the environment. The main action is to test the waste in order to characterize it. pH dependence tests, the upflow percolation test, the maximum availability test and NEN 7375 tank test are available to characterize the granular and monolithic waste. Compressive tests enable operators to calculate the load bearing capacity. Others methods are applied for nuclear waste characterization. The review of the major degradation pathway of a waste package permits the prediction of the long term behaviour of waste. This report underlines the importance of the tests and models and their limitations and builds on reports such as the Non-Radioactive Waste Solidification Methods and Stability Assessment from Dundee University. Much progress has been made about waste characterization and technologies. However, the prediction of long term deterioration of wasteforms is a topic where researchers can intensify their knowledge before devising a new regulatory tool.

Aims and Objectives

Headline Findings