Cost Estimation for Decommissioning & Radioactive Waste Seminar was held on September, 26 – 27, 2013. The seminar was devoted to the issues connected with cost assessment of decommissioning and waste management. Two our employees participated in the seminar: Vladimir Daniska with presentation about „Understanding the International Structure for Decommissioning Costing (ISDC) of Nuclear Installations“ and Matej Zachar withe presentation called „Decommissioning Costing and Planning Tool OMEGA – ISDC“.