Current status of Chernobyl NPP decommissioning `

1. Current status of Chernobyl NPP decommissioning ` Bulgaria, Varna, 27-29 May 2009

2. Strategy of Chernobyl NPP decommissioning • early removal of fuel channels • equipment dismantling in the central hall • central hall hipped roof reconstruction • dismantling of reactor external systems • primary circuit and reactor safe enclosure up to 50 years • final state – “Brown spot” Deferred dismantling (SAFSTOR)

3. ChNPP current activity Main activities at the stage of ChNPP units shutdown : • units maintenance in safe state; • decommissioning infrastructure construction; • unloading of SNF – main activity determining the stage duration; • systems and elements final shutdown; • decommissioning life-support systems reconstruction; • Comprehensive engineering and radiation survey (CERS); • dismantling of the reactor facilities external equipment; • removal of RAW from units; • decommissioning documentation development

4. Maintenance in Safe Condition In 2008 SSE ChNPP operator provided adequately: • safety of units 1, 2, 3, Interim Storage Facility - 1 and “Shelter” object; • safe storage of spent nuclear fuel in ISF-1, reactor cooling ponds, safe management of ChNPP and Shelter object Radioactive Waste under conditions of observance of appropriate licenses, normative acts and IAEA safeguards being in force. Radiation impact on personnel, public and environment did not exceed established dose limits of personnel and public, normative releases and effluents

5. Maintenance of units in safe state Design lifetimes of units 1, 2 have been extended • Units 1, 2 ageing management program has been developed; • Technical condition of units 1, 2 critical elements and their remaining life have been assessed; • Safety evaluation reports for units 1, 2 have been developed; • Design lifetime for unit 1 has been extended till 09.2009. Currently, the documents for extension of operation life till 2017 are being prepared; • Design lifetime for unit 2 has been extended till 10.2018

6. ISF-1 maintenance in safe state License obtaining to operate ISF-1 In accordance with the SNRCU Collegium decision No 18 dated 26.06.2008 the License ЕО No 000859 dated 25.06.2008 was obtained to carry out activity at the stage of life cycle “operation of nuclear facility” Interim Storage Facility-1 • “Implementation plan to improve Interim Storage Facility-1 safety” has been developed and is being carried out. • To present day there have been performed the following activities: • reinforcement of storage facility building structures; • installation of preventing shielding plate in the fuel receipt cooling pond

7. Progress in ChNPP shutdown SNF unloading 05.12.2005 – the works commenced to unload Spent Nuclear Fuel from reactor cores of units 1, 3 and move them to Interim Storage Facility -1. January 2007 – Spent Nuclear Fuel were completely unloaded from reactor core of unit 1; April 2008 – Spent Nuclear Fuel were completely unloaded from reactor core of unit 3 At present: -There are no Spent Nuclear Fuels in the reactor cores of units 1, 2, 3 -Spent nuclear fuels are only in the reactor cooling ponds -The works are underway to prepare movements of spent nuclear fuels from unit 3 cooling ponds -It was started manufacture of penals for Spent Nuclear Fuel Assemblies using own resources

8. Progress in ChNPP shutdown Final shutdown of systems and elements • 317 systems and subsystems were decommissioned, that is about 60% oftotal amount of ChNPP equipment and piping; • The units were released from potentially dangerous substances (combustible and hostile environment); • Units 1, 2 reactors have been “finally shut down”; • The works are underway to bring unit 3 reactor into state “Final shutdown”

9. Decommissioning activities main results Dismantling operations In 2004 the activities started to dismantle reactor external equipment. More than 1000 tons of heat-mechanic and electrotechnical equipment, pipes, metal structures have been dismantled for the whole period of works. 120 tons of metal have been decontaminated to the levels of unrestricted use Buildingof Nitrogen Oxygen Plant -1 before (on the left) and after (on the right) equipment dismantling

10. Main work results on ChNPP operation shutdown: Comprehensive Engineering Radiation Survey of systems and elements • Over the 1998 to 2005 period Comprehensive Engineer Radiation Survey was being carried out for units 1, 2, 3 and external facilities. • Over the 2007 to 2009 period Comprehensive Engineer Radiation Survey for unit 1 was being updated. • Amount of metal at units 1, 2, 3 was determined broken down by contamination categories

11. ChNPP decommissioning documentation development Developed and approved: • “State program on ChNPP decommissioning and transformation of the “Shelter” object into ecologically safe system". • “ChNPP decommissioning integrated program" • “ChNPP decommissioning conception". • “ChNPP decommissioning program". • “Levels of limited release from regulatory control (criteria of site final state)". In process of development: • “Program of research-and-engineering maintenance of ChNPP decommissioning activities and transformation of the SO into ecologically safe system”. • “Project of ChNPP final shutdown and preservation”

12. Main results of activities at the Shelter object “Stabilization of SO building structures and work completion to repair “light” roof In 2008 the works were performed to implement the project “Stabilization of the Shelter object building structures”. On 06.11.2008 State commission signed acceptance certificate to put into operation the facility of the completed construction within the framework of this project. That allowed to provide the sufficient level of safety for the next 15 years and it is a necessary condition for the implementation of the New Safe Confinement construction project

13. Main results of activities at the Shelter object Works on “Pioneer Wall” Berm removal were performed in 2008. It has been removed about 23000 m3 of technological materials and 1 and 2 categories SRW . Deed of Work Acceptance was signed.

14. Main results of activities at the Shelter object Local sealing (repair) of an easy roof is executed in 2008 that has allowed to reduce considerably ingress of atmospheric precipitation inside the Shelter object, to reduce Liquid Radioactive Waste volume and to improve building constructions conditions.

15. Main results of activities at the Shelter object Works of the 2-nd phase of the first project stage on site preparation for New Safe Confinementconstruction are close to completion. Excavations works necessary for northern and southern bands foundation ditches arrangement for future confinement assembly siteare performing during this phase.

16. Decommissioning infrastructure • The main infrastructure facilities ensuring ChNPP decommissioning activity are: • Industrial Heating Plant – to provide with steam and hot water; • Industrial Complex for Solid Radioactive Waste Management; • Liquid Radioactive Waste Treatment Plant; • Interim Spent Fuel Storage Facility 2–to store more than 21 000 Spent Fuel Assemblies.

17. Decommissioning infrastructure Industrial Heating Plant (IHP) • The main characteristics: • Quantity of boilers - 3 steam-boiler and 3 water-heating boiler; • Fuel - gas, black oil; • Capacity on hot water - 150 Gcal/h; • Capacity on steam - 150 t/h (~100 Gcal/h).

18. Decommissioning infrastructure Interim Spent Fuel Storage Facility (ISF-2) • Construction is carried out for Nuclear Safety Account funds; • The general contractor was "FRAMATOME“ company; • Since April 2003 construction is suspended because of impossibility to license this facility due to significant safety deficiencies, the contract with "FRAMATOME" was terminated; • Completion of ISF-2 Project will carry out Holtec International, USA. The contract agreement between SSE ChNPP and Holtec International has been signed in September 2007; • Forecasted term of Interim Storage Facility - 2 commissioning is the middle of 2013.

19. Decommissioning infrastructure Industrial Complex for Solid Radioactive Waste Management (ICSRM) Lot 1 - Installation for solid waste retrieval from existing solid waste storage facilities; Lot 2 – Solid waste processing plant and temporary storage facility for Long Lived Waste and High Level Waste(84 Building); Lot 3 – Near-surface storage facility for low and intermedium short-lived RAW.

20. Decommissioning infrastructure Liquid Radioactive Waste Treatment Plant (LRTP) • Liquid Radioactive Waste Treatment Plant construction is carried for the Nuclear Safety Account funds; • The general contractor is Consortium of companies with leading organization BELGATOM; • The contract was terminated in 2006 by mutual consent of the parties, LRTP completionis carried out by ChNPP’s own forces; • Designed capacity of the plant – 2500 m3/year RAW;

21. Decommissioning infrastructure Complex for steel drums and reinforced concrete container manufacturing for SSE ChNPP’s radioactive waste storage (CSD and RCCM) • Topographical,geodesic and development works at the site are implemented • The basic documents are developed and approved, payment under the project is made • Design is agreed without remarks, currently passes complex expertise

22. Decommissioning infrastructure Tacis Project – Upgrading of capacities for cutting of long-length waste at Chernobyl NPP • Currently available in CH installations FLIC - Facilities for long-length items cutting doesn’t meet modern requirements • Facility for highly active long-length items cutting (FHALIC)is created within the Tacis projectframework • The tender for the Contractor selection is announced • Tender proposals opening - 08.06.2009

23. Decommissioning infrastructure Chernobyl NPP Decommissioning Information Support System Unified system of ChNPP decommissioning activity Managementis under development at Chernobyl NPP. Integrated ChNPP Units decommissioning schedule will be introduced on the basis of this system according to facilities breakdown and activity directions at the enterprise. The system of coding of activity types,works and resources, with the subsequent costing in process of decommissioning will be introduced. That will ensure a transparency of planning and centralized control of expenses. Modules of ChNPP decommissioning Information Support System

24. Main tasks for 2009 • ChNPP Units and Shelter object maintenance in a safe condition; • ICSRM commissioning; • Preparation of trenches for NSC foundations; • Starting of Unit 3 defueling; • Completion of works on Reactor Installation - 3 final shutdown.