In 1999 was issued commonly by EC, IAEA and OECD the document “A Proposed Standardised List of Items for Costing Purposes in the Decommissioning of Nuclear Installations” (PSL). The main aim of this document was to establish a standard platform for structure of presented decommissioning costs. The decommissioning costs calculated in various projects have in general different structure and for presenting the decommissioning costs in PSL structure, additional recalculation or rearrangement of data are needed. This can increase the uncertainty of data or it is not sure if they really reflect the cost defined in the PSL structure. The paper describes a newly developed cost calculation code, which respect the PSL structure. The calculated costs data are compatible with the standardised structure. The code is intended to use for decommissioning planning of a NPP with a non-standard radiological situation, shutdown after an accident For this purpose the code has an integrated material and radionuclide resolved radioactivity flow control system in calculation process which enables a direct calculation link between the input material and radiological inventory data and the calculated costs and other decommissioning parameters for increasing the accuracy of calculated data. The code has an integrated cost allocating system for generating of user defined working breakdown structure of the decommissioning project with allocated costs calculated in PSL structure. The working breakdown structure can be on-line optimised using the standard Microsoft Office Project Planning tool software.
The project include systematic scenarios analysis of conditionally released materials from the decommissioning of nuclear installations and the creation of new knowledge in this field, which will be used for implementing projects for reuse of these materials. New knowledge includes data about materials from the decommissioning (types of materials and radiological data on the basis of analysis of various scenarios). Scenarios contain information about conditionally released materials, data of the external exposure of personnel who will assemble those structures and who will be use the constructions up to the target scenario. Scenarios assume guarantee that the final products will be placed on the current position for a very long period from 50 to 100 years. The paper presents the review of activities for manufacturing of various steel construction elements made of conditionally released steels and activities for realisation of selected scenarios for reuse of construction elements. The ingots after melting of decommissioned radioactive steel materials are as the starting material for manufacturing of steel components. Ingots from the controlled area will be melted into induction furnace and the mixture of liquid steel will be alloyed for achieve of required chemical parameters. Typical steel products suitable for established scenarios are steel rebar of concrete, steel profiles of various forms, railway rails and rolled steel sheets. Target scenarios include an analysis of staff exposure during installation of steel constructions as well as exposure of individual from critical groups of population during their exploitation.
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