Geoinformatics Investigation of the Bátaapáti Radioactive Waste Repository Chambers from a Seismoacoustic Point of View

The Bátaapáti National Radioactive Waste Repository was created using mining methods in a granitoid formation. Changes in the receiving rock body are monitored by the seismo-acoustic measurement network that has been in operation since the cavity was designed. The present work builds on geoinformatics methods and presents automated codes written for a Geographical Information System, which filters out incorrect spatial positions from a large mass of seismoacoustic point sources. The incorrectly measured points show the greatest inaccuracy vertically. The most intense emission source points with appropriate positions can be detected in the areas between the side walls of the adjacent storage chambers and near the fracture system detected along the trench end of the chambers. Based on the distance between the point sources and the storage chambers, it was also possible to refer to the extent of the damaged/disturbed rock zone around the excavation, which means a 7-meter rock belt.

Keywords: Bátaapáti, excavation, geoinformatics, seismo-acoustic emission