Performance and safety analysis

National experience

Kemakta has been a central supplier of performance and safety analysis to support the disposal of radioactive waste from the Swedish nuclear power programme since the start of operations in 1975. In March 2011, SKB applied to the Swedish Radiation Safety Authority and to the Land and Environmental Court for permission to build a spent fuel repository in Forsmark. Kemakta has been an integral part of the development of the concept, modelling and safety analysis for this. In the second half of the 1970s and beginning of the 1980s, Kemakta contributed to the KBS-1, KBS-2 and KBS-3 studies that developed the concept for disposal of high-level waste and spent nuclear fuel. We have also evaluated alternative methods for the disposal of spent nuclear fuel.  During the 1990s, Kemakta has contributed to several safety analyses of the concept such as SR-95, SR-97, SR-Can and the base for the application (SR-Site).

SKB has finished an application for a licence to extend the SFR repository for disposal of decommissioning wastes from the Swedish nuclear facilities. Kemakta has been a part of the team preparing the safety assessment for this. We were heavily involved in the development and licensing of the original SFR repository in the 1980s, and were the consultancy responsible for the preliminary and final safety assessment reports for the facility (1982, 1987). Kemakta were also engaged in updating the safety evaluations in the 1990s and early 2000s. These safety assessments are supported by groundwater flow modelling, radionuclide transport modelling, evaluation of the durability of concrete barriers and evaluation of processes for degradation of waste solidification matrices (primarily concrete and bitumen) carried out by Kemakta.

International experience

  • Kemakta has significant experience of working with different international concepts for radioactive waste disposal including studies in, for example, Switzerland Germany, France, Russia, Lithuania, Japan, Korea and Taiwan.
  • Evaluation of safety indicators for the assessment of the long term safety of the final disposal of radioactive waste.
  • Bundesamtes für Strahlenschutz BfS, Germany.Safety analysis studies for low and intermediate level radio-active waste for Project Gewähr, NAGRA, Switzerland.
  • Safety analysis studies for Centre de La Manche, ANDRA, France.
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