Following the shutdown of a nuclear power plant, the operator is obliged to dismantle the facilities. In order to remove plant components from nuclear power plants and release them in accordance with the Radiation Protection Ordinance, their activity must be below a limit value. Typical nuclear power plants in Germany have 100,000 m² to 450,000 m² of concrete surfaces [Gentes et al., 2015] that must be processed for clearance.

According to the current state of the art, the spatial data acquisition is performed manually in the previous process. Thus, no digital spatial models or similar are available for the further process steps.

The aim of the ViMPoG project, which is funded by the BMFTR, is to develop methods and algorithms for an improved, efficient and at the same time safe execution of building clearance and for planning decommissioning works.  In the center of the project is the digital model for users in nuclear facilities, on the basis of which both the premises to be released and all relevant trouble spots within these parts of the building can be visualised and evaluated according to the requirements of the clearance process. In the project, algorithms are investigated and developed for automated creation of the model. Based on the visualisation of the building structures and other information from the so called building cadastre decontamination work and clearance measurements are to be planned digitally and the precise positioning of the measuring device is to be supported and monitored. Therefore, appropriate procedures and algorithms are being investigated and developed. The measuring geometries are to be optimized with the involvement of the trouble spots and further information included in the digital model. In this way, it should be possible to reduce the effort required for measurement planning, execution and documentation of decontamination and decision measurements for users in nuclear facilities. In addition, a digital release process on the part of operators, authorities and experts can be realized based on this, which can contribute to standardisation  of building clearance.

The project builds on the findings and results of the ViSDeMe project, which was also funded by the BMFTR.