ChNPP, 2009

Current status of Chernobyl NPP decommissioning`

Bulgaria, VarnaBulgaria, Varna, 27-29 , 27-29 MayMay 2009 2009

ChNPP, 2009

Strategy of Chernobyl NPP decommissioning

Deferred dismantling (SAFSTOR)• 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”

Shutdown Final shutdown and Preservation

Safe Enclosure

Dismantling

204520222012 20642002

L i c e n s e f o r d e c o m m i s s i o n i n g ( 2 0 0 2 – 2 0 6 4 )

Separate permissions for stages implementation

ChNPP, 2009

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

ChNPP, 2009

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

Maintenance in Safe Condition

ChNPP, 2009

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

Maintenance of units in safe state

ChNPP, 2009

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

ISF-1 maintenance in safe state

License obtaining to operate ISF-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

ChNPP, 2009

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

Progress in ChNPP shutdown

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

ChNPP, 2009

● 317 systems and subsystems were decommissioned, that is about 60% of total 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”

Progress in ChNPP shutdown

Final shutdown of systems and elements

ChNPP, 2009

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

Decommissioning activities main results

Building of Nitrogen Oxygen Plant -1 before (on the left) and after (on the right) equipment dismantling

ChNPP, 2009

● 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

Main work results on ChNPP operation shutdown:

Weight of nonferrous

metal(Т)

Weight of stainless steel(Т)

Weight of carbon steel(Т)

Weight of cast iron

(Т)

I generation

Units 1 and 2

I 693, 51 195, 25 748, 05 10, 98

II 1 719, 08 2 598, 42 12 030, 95 102, 39

III 126, 47 4 984, 78 8 985, 18 26, 243

IV 2, 46 465, 48 713, 086 4, 98

2 541, 54 8 243, 93 22 477, 27 144, 61

II generation

Unit 3

I 907, 88 684, 15 4 297, 19 41, 09

II 3 143, 01 7 084, 72 22 355, 81 302, 64

III 177, 35 3 690, 95 3 049, 51

IV 31, 65 1 199, 25 1 181, 85 154,96

4 259, 90 12 659, 075 30 884, 37 343, 89

Comprehensive Engineering Radiation Survey of systems and elements

ChNPP, 2009

ChNPP decommissioning documentation development

Developed and approved:1. “State program on ChNPP decommissioning and

transformation of the “Shelter” object into ecologically safe system".

2. “ChNPP decommissioning integrated program"3. “ChNPP decommissioning conception". 4. “ChNPP decommissioning program".5. “Levels of limited release from regulatory control

(criteria of site final state)".

In process of development:1. “Program of research-and-engineering

maintenance of ChNPP decommissioning activities and transformation of the SO into ecologically safe system”.

2. “Project of ChNPP final shutdown and preservation”

ChNPP, 2009

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

“Stabilization of SO building structures and work completion to repair “light” roof

Main results of activities at the Shelter object

In 2008 the works were performed to implement the project “Stabilization of the Shelter object building structures”.

ChNPP, 2009

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.

Main results of activities at the Shelter object

ChNPP, 2009

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.

ChNPP, 2009

Main results of activities at the Shelter object

Excavations works necessary for northern and southern bands foundation ditches arrangement for future confinement assembly site are performing during this phase.

Works of the 2-nd phase of the first project stage on site preparation for New Safe Confinement construction are close to completion.

ChNPP, 2009

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.

Decommissioning infrastructure

ChNPP, 2009

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).

Industrial Heating Plant (IHP)

Decommissioning infrastructure

ChNPP, 2009

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.

Decommissioning infrastructure

ChNPP, 2009

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.

Decommissioning infrastructure

ChNPP, 2009

• 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 completion is carried out by ChNPP’s own forces;

• Designed capacity of the plant – 2500 m3/year RAW;

Liquid Radioactive Waste Treatment Plant (LRTP)

Decommissioning infrastructure

ChNPP, 2009

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

Decommissioning infrastructure

ChNPP, 2009

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 project framework

• The tender for the Contractor selection is announced• Tender proposals opening - 08.06.2009

Decommissioning infrastructure

ChNPP, 2009

Chernobyl NPP Decommissioning Information Support System

Unified system of ChNPP decommissioning activity Management is 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.

Data bank

Projects Management and calculations

Inventory and survey

Dismantling activity management

Accounting of dismantled materials

and RAW

Archive and reference data

WEB

Modules of ChNPP decommissioning Information Support System

Decommissioning infrastructure

ChNPP, 2009

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.