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Policy Department D: Budgetary Affairs ____________________________________________________________________________________________________________________ For each of the key phases sub-tasks of second level are defined (work packages) as well as their sequence of implementation. Third and lower level activities are defined, as well as the time and the terms of their implementation. A detailed schedule is developed. Analysis of the necessary human resources and expenditures has been done. According to the Work Breakdown Structure, dismantling activities start in the 'observed area' (OA) and end in the 'controlled area' (CA). The international experience to start the dismantling from the non-contaminated systems and equipment is followed. The dismantling of systems by category of contamination follows the next sequence: category I, category II, category III. Due to the accepted acceleration of the decommissioning process the dismantling of the activated equipment will be implemented in parallel with the III category equipment dismantling in the CA. Dismantling in the OA: In early 2004 the Nuclear regulatory Agency (NRA) issued to Kozloduy NPP a license series Е, № 00613 for Unit 2 and license series Е № 00707 for Unit 1 operation in operational status E of the reactor – without production of energy. This reactor status is characterized by absence of fuel in the core and storage of the fuel in the at-reactor pools. In the beginning of December 2006 NRA introduced changes in the operational licenses of Units 1 and 2, thus permitting dismantling of systems and equipment, not related to the safety and not containing radioactive substances over the regulatory clearance levels. Kozloduy NPP developed and started to implement a 'Dismantling program', which scope is the dismantling of constructions and system’s components конструкциите of Units 1 and 2, characterized as III-d category for decommissioning (unnecessary systems that may be isolated and/or dismantled). Since October 2010 NRA issued to SERAW licenses for operation of Units 1 and 2 as radioactive waste management facilities, subject to decommissioning. The licenses include activities for dismantling and regulatory clearance of materials. In 2011-2013 SERAW has dismantled large-dimension equipment in Units 1 and 2 Turbine hall, amounting to over 3000 tons from critical groups by Radiological inventory: І – clean materials without potential contamination and ІІ – clean material with potential contamination, for which clearance criteria are met based on approved by NRA radionuclide vector. Dismantling in the CA: The dismantling in the CA will start after obtaining a license for decommissioning of Units 1 and 2. The development of a project for dismantling of the equipment and systems in the CA is forthcoming. The project will include reactor vessels and other internal equipment dismantling as well. 148
Nuclear Decommissioning: Management of Costs and Risks ____________________________________________________________________________________________________________ The identified decision breakpoints in that plan (technical, regulatory and financial dependencies, decision base etc.) The planning of the main decommissioning activities on Units 1 and 2 has the following aims: Final aim of the decommissioning activities: Decommissioning activities frame: until 2030 Quantities of materials, subject to dismantling during decommissioning: Operational RAW, stored in AB-1, to be treated: Removal from the site of the sources of ionizing radiation and its clearance from regulatory control. About 30 000 tons, 20 0000 tons of them - metals About 2000 m 3 solid phase in ECT About 347 m 3 sorbents About 540 m 3 solid RAW etc. The 'Technical Design for the Decommissioning of KOZLODUY Units 1 and 2 (PHARE Contract BG 9608-01-01- L001)', determines the technical, regulatory and financial aspects of the decommissioning, and the main approaches for their solution. The time planning in that concept (What were the major set-backs in the time plans so far? What measures were taken to remove obstacles? Etc.) On 14 April 2011 Bulgaria has presented to the EC its position on the continuation of the financial support of the EU for 2014-2020 in relation with the earlier shutdown for decommissioning of Units 1-4 of Kozloduy NPP, including conceptual linear schedule for the decommissioning of Units 1-4. According to the schedule the decommissioning is accelerated and is foreseen to be finished in 2030 (5 years earlier than according to the initial plan). The necessary prerequisites for the implementation of the accelerated decommissioning are: Decommissioning license for Units 1 and 2 – by end 2013; Timely implementation of the projects of the decommissioning programme for Units 1-4 of Kozloduy NPP (financed mainly from KIDSF): o Commissioning of the facility for measurement and clearance of materials - September 2016; o Commissioning of the Workshop for defragmentation and decontamination of materials – Contactor: Consortium ONET Technologies Nuclear International and Risk Engineering OOD. It is expected to be implemented in July 2015; 149
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