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Khrushchov, D. P.; Gromok, L. I.
Proceedings of the 5th International Conference: Nuclear Option in Countries with Small and Medium Electricity Grids2004
Proceedings of the 5th International Conference: Nuclear Option in Countries with Small and Medium Electricity Grids2004
AbstractAbstract
[en] Ukraine currently has stored enormous quantities of radioactive waste (RAW) resulting from the operation of nuclear power plants (NPP) and the Chernobyl accident. At present, there are five NPP's (including Chernobyl), comprising 14 units (including four at Chernobyl, whose closure was affirmed by a special State Decree in 2000). The total capacity for energy production is about 12000 MW. The major part (96-97%) of NPP's operational waste is represented with law and intermediate ones (LLW, ILW). In 2000 total amount of LLW-ILW solid waste was about 43000 m3, liquid waste - 42000 m3. The total volume of high level waste (HLW), ILW with long-lived radionuclides and spend full is: spent fuel in cooling pools - 3000 t (560 m3) operational waste - 12000, waste at the shelter object - 34000 t. If a simple linear prognosis is used, the dynamics of RAW has to be as follows: LLW-ILW 86000 m3 (solid) 84000 m3 (liquid) - by 2010; spent fuel 2010 - 8200 t, 2020 - 11700 t, 2030 - 15200 t. RAW accumulation pose actual and potential danger for population and environment both in Ukraine and in other countries of Europe and Asia. The strategy for RAW management is in development now. The legislative basis results from special Decrees and laws of Ukraine. Regulatory basis for low level and intermediate level waste (LLW, ILW) management and high level waste (HLW) and spent fuel management in NPP's is more or less formed. Regulatory basis for HLW and spent fuel disposal is in development now. The NPP's waste management comprises the following areas: LLW, ILW; HLW and long-lived ILW; spent fuel. The system for LLW-ILW management includes two subsystems, namely: preliminary reprocessing in NPP's and subsequent reprocessing and disposal in Central enterprise for reprocessing RAW (CERRW). Nowadays according to State Complex Program on Radioactive Waste Management (1995-99) the preparation of CERRW foundation and construction of surface interim repository and subsurface storage is in progress. A system of HLW and spent fuel management comprises operational waste and spent fuel of PWR and RBMK reactors. In NPP's initial storage of spent fuel is provided in pools and operational wastes are stored in storage facilities. Program for RAW disposal in storages of geological type has been elaborated as a part of Complex Program (see above). In fact the preparatory stage of the Program has been completed. The realization of RAW management program in the terms of the above areas includes the following general issues and tasks: legislative basis; regulatory and scientific methodology supervision; informative-analytical supervision; management and control systems; financial, resources and personnel supervision; scientific-technical supervision, technologies; international cooperation; public relations; definition of program measures (by stages). The main tasks and measures are have been defined for outlined areas of RAW management. Three successive three stages of program activities are singled out, as listed below. The first stage of the Complex Program includes the development and modernization of subsystems for RAW preliminary reprocessing in NPP's and preparation of subsystems for deep reprocessing foundation in CERRW, the beginning of multipurpose containers stock foundation, planning and organizing of special transport manufacturing, planning of surface temporary storage facilities (including central storage for HLW and storages for LLW-ILW), beginning of dry storages for spent fuel construction in four NPP's etc; selection of sites for deep geological RAW disposal storages and preliminary sites characterization activities are also planned. Middle-term plan comprises further development of subsystems for LLW-ILW management, construction of surface and near surface storage facilities, as well as subsystems for HLW and spent fuel-reprocessing waste in CERRW. The characterization of sites for storages in geological formations is planned. Long-term plan includes the continuation and completion of middle-term targets measures. In the branch of deep geological disposal the experiments in Underground experimental laboratory and construction of the storage facility is planned. According to departmental planning of Ministry of fuels and power the major part numbers of NPP's units have to be turned over for decommissioning in the period 2011-2019. Several units that are in the state of construction have to be dismantled after 2030. A process of NPP's decommissioning includes a set of conventional operations according to generally accepted approaches (excluding accidental damaged Chernobyl 4th unit). Technical operations of decommissioning which have the direct relation to RAW management area are as follows: extraction of radioactive materials, decontamination, radioactive materials handling, transportation and RAW disposal. The main groups of decommissioning RAW are as follows: deactivation (decontamination), constructions and equipment dismantling, facility dismantling and site remediation. General scheme of decommissioning RAW management includes the following operations and technologies: collection, separation, conditioning, immobilization, packing, interim storage, transport, transfer to disposal.(author)
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Pevec, D.; Debrecin, N. (eds.); Croatian Nuclear Society, Zagreb (Croatia); International Atomic Energy Agency, Vienna (Austria); European Nuclear Society, Brussels (Belgium); 996 p; ISBN 953-96132-8-0;
; 2004; [6 p.]; 5. International Conference: Nuclear Option in Countries with Small and Medium Electricity Grids; Dubrovnik (Croatia); 16-20 May 2004; Available E-mail: Khrushchov@hotmail.com

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