Algorithmisation of nuclear installations equipment dismantling

• Published in: Nuclear engineering and design 2010-12, Vol.240 (12), p.4103-4110
• Main Authors: Bezak, Peter, Daniska, Vladimir, Rehak, Ivan, Necas, Vladimir
• Format: Article
• Language: English
• Subjects: Algorithms; Applied sciences; Categories; Controled nuclear fusion plants; Decommissioning; Decontamination; Demolition; Dismantling; Dosage; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Fission nuclear power plants; Fuels; Installations for energy generation and conversion: thermal and electrical energy; Mathematical models; Nuclear fuels; Surface chemistry
• ISSN: 0029-5493; 1872-759X
• DOI: 10.1016/j.nucengdes.2010.09.027

The standardised structure of cost items for decommissioning was issues jointly by OECD/NEA, IAEA and European Commission in 1999 for promoting of harmonisation in decommissioning costing. The computer code OMEGA, developed recently by the company DECOM, a.s. in Slovakia, implements this standardised structure of cost items as the base of an universal cost calculation structure for evaluation and optimisation of cost, exposure and other parameters for decommissioning options. The paper focuses on selected modules of the code which were developed for modelling of dismantling of systems, decontamination of building surfaces and demolition of structures. Evaluation of these activities is one of the most important tasks to be done prior to performance of decommissioning activities. Selection of proper techniques for these activities depends on category of the item to be dismantled, decontaminated or demolished (material composition, construction, type of building surface, etc.), local radiological conditions (dose rate, contamination), local working conditions (constraints), and other factors. Local radiological conditions and pre-defined limits of dose rate determine the selection of manual or remote techniques. Dismantling, decontamination of building surfaces and demolition activities include also set of preparatory and finishing activities. Extent of these auxiliary activities varies when performed within or outside of the controlled area and/or when performed manually or remote. Paper presents the approach for selection of the techniques for decommissioning activities and extent of auxiliary activities which was implemented in the OMEGA code, using the standardised cost structure as the cost calculation structure.