In 1993 Hungary launched its first project to solve the final disposal of high level and/or long-lived radioactive waste, as well as of spent fuel. Between 1996 and 1998 – using the infrastructure of a former uranium mine – preliminary underground investigations (at 1100 m depth) were carried out concluding that the Boda Claystone Formation in southwest Hungary is potentially suitable for a future high level waste (HLW) repository. Unfortunately, these in-situ investigations had to be terminated in 1998 because of the closure of the uranium mine.

In 2000 PURAM initiated a country-wide screening process to identify potential host rocks. This country-wide screening was carried out by evaluating the potential host rock formations in detail, based on information that was available in literature. This comprehensive investigation confirmed that the Boda Claystone Formation has the highest potential among the suitable host rocks for a HLW repository.

Since 2000 two short surface-based investigation programs have taken place, the first one started in 2005 and the second in 2014. They used a wide range of geoscientific tools (such as boreholes, seismic sections etc.). However, financial obstacles emerged during these programs: the first project was interrupted without completion, while the second was suspended in 2015.

However, since 2015 preparations have been in progress to continue the site selection process in the future and the environmental and geodynamic monitoring activities have been continuously maintained.