Models for long-term glass alteration are required to satisfy performance predictions of vitrified nuclear waste in various disposal scenarios. Durability parameters are usually extracted from short-term laboratory tests, and sometimes checked with long-term natural experiments on glasses, termed analogues. In this paper, unique potential ancient glass analogue from Sweden is discussed. The hillfort glass found at Broborg, represents a unique case study as a vitrified waste glass analogue to compare to Low Activity Waste glass to be placed in near surface conditions at Hanford (USA). Glasses at Broborg have similar and dissimilar compositions to LAW glasses, allowing the testing of long-term alteration of different glass chemistries. In addition, the environmental history of the site is well documented. Initial investigations on previously collected samples established methodologies for handling and characterizing these artifacts by laboratory methods while preserving their alteration layers and cultural context. Evidence of possible biologically induced glass alteration, and different alteration in the 2 types of glass found at the Brogorg site is presented.
