The Interim Spent Nuclear Fuel Dry Storage Facility (ISF-2) – is the facility designed for acceptance, preparation for storage and storage of Spent Fuel Assemblies (SFA) and Additional Absorbers (AA), currently stored at Chornobyl NPP.

The construction began in 2001 and is funded from the Nuclear Safety Account of the European Bank for Reconstruction and Development (EBRD).

ISF-2 consists of 2 parts:
1. Spent Fuel Processing Facility (SFPF). Its function is preparation for storage and packing of about 21 thousand spent fuel assemblies, transported from from “wet” type ISF-1. The facility is designed to ensure the minimal annual capacity for processing of 2,500 fuel assemblies or absorbers.

2. Spent Fuel Storage Area. The following operations are carried out in this Area:
• transportation of the canisters, filled with spent nuclear fuel from the Spent Fuel Processing Facility to the Storage Area, using the canisters handling and transportation system;
• loading of canisters into horizontal concrete storage modules with the 100-year design life-time
• storage of canisters with nuclear fuel within 100 years.

Storage of spent nuclear fuel will be carried out using the dry modular storage technology.

The general principle of dry model storage is that fuel is stored in sealed baskets filled with inert gas. The baskets themselves are placed in concrete modules. The module design serves as radiation protection, and also prevents the damage of the metal basket.

Dry technology has the following advantages:
1. Possibility to implement construction of the facility in a staged manner and lower initial investment in the construction.
2. Passive system (due to natural air exchange) for removal of residual heat from spent fuel assemblies.
3. Generation of insignificant amount of radioactive waste during operation of the storage facility and almost complete absence of liquid radioactive waste.
4. Operating costs are significantly lower in comparison with the wet storage.

The accepted technology for ISF-2 involves the use of a Double-Walled Canister (DWC). Its design provides long-term storage of fuel due to isolation from the environment. Therefore, there will be no radiation effect on the environment under normal storage in concrete modules. One DWC contains 93 spent fuel assemblies.

On December 14, 2020, active phase of hot testing was completed; 186 spent fuel assemblies were moved to ISF-2.

Read more: ChNPP completes transfer of spent nuclear fuel within “hot tests” at ISF-2

On April 26, 2021, ChNPP obtained Licence for ISF-2 Operation which enabled to start transportation of the fuel in operation mode.

On May 21, the SSE ChNPP obtained an individual permit for Removal of Standard Spent Nuclear Fuel from ISF-1.

On 08 June, spent fuel transportation in operation mode started. As of January 2022: 1,698 spent fuel assemblies have been moved to ISF-2 for long-term storage.

Project No

Project title


Cost (under the Contract)

Time frame


Modernization of dosimetric control system in the Exclusion Zone and environmental (radiation) monitoring at Vektor Complex and Buriakivka RAW Disposal Facility.

Assystem Engineering and Operation Services SAS

727 400 EUR

Beginning: 08.01.2021
Completion: 18.07.2022


Support to the Ukrainian institutions in addressing national decommissioning, radioactive waste and spent nuclear fuel management, including radio-ecological monitoring


392 767,50 EUR

Beginning: 01.01.2020
Completion: 31.12.2023


Spent Nuclear Fuel Storage Facility (ISF-2)

Holtec International, USA

166 185 472 EUR

362 058 522 USD

Beginning: 1996-11-12
Completion: 2021-12-31


Equipment dismantling



Beginning: 2012
Completion: -

The project is funded by the European Union.

Project objective: modernization of dosimetric control system in the Exclusion Zone and environmental (radiation) monitoring at Vektor Complex and Buriakivka RAW Disposal Facility.

Project tasks:

  • Development of design and purchase documentation for modernization of the environmental monitoring systems at Vektor and Buriakivka as well as dosimetric control systems at ChNPP and within the Exclusion Zone in general (including the contamination which can be spread by vehicles).
  • Analysis of available systems and their compliance with the safety requirements of Ukraine and best international practices.
  • Development of actions for improvement of the systems.
  • Development of technical specifications on whose basis the primary actions of the system improvement will be taken (these actions include shipment, installation, testing and commissioning).

In terms of upgrading the ChNPP radiation and dosimetric control, the existing system was analysed, the improvement actions for it were developed, and general assessment was completed. Due to both the limited financing of the next project phase and large scope of work, the project for ChNPP was split into two LOTs:

LOT-1 — purchase of equipment for refurbishment of the ChNPP Individual Dosimetric Control Laboratory and purchase of individual dosimeters.
LOT-2 — purchase of auxiliary dosimeters to check eye lens and limbs.

The development of the technical specifications and purchase documentation is in progress. The work is carried out in line with the project plan.

The activities are carried out under the IAEA technical cooperation project UKR9040.

The project objective is supporting the Ukrainian institutions in addressing national decommissioning, radioactive waste and spent nuclear fuel management, including radio-ecological monitoring.

Project tasks: 

Enhancing the capabilities at the enterprises under authority of State Agency of Ukraine on Exclusion Zone Management in terms of:

  • Arrangement of safe and efficient decommissioning activity.
  • Improvement of radioactive material management.
  • Arrangement of safe and efficient activities on radiation safety .
  • Ecological monitoring of the environment on basis of the best international practices.

Implementation progress: 

  • • Expert Missions were completed on review of SSE ChNPP report on progress of FS&P stage for 2019-2029.
  • • Technical specifications for purchase of the agreed with the IAEA equipment were developed and agreed.
  • • The work is underway to deliver the set of equipment, materials and guidance manual for radiochemical removal and quantitative identification of americium (241Am, 243Am) and plutonium (238Pu, 239Pu, 240Pu, 241Pu, 242Pu), radionuclide spectra in ChNPP radioactively contaminated waters and liquid radioactive waste.
  • • The work is underway to deliver the analyzer of total organic carbon.
  • • SSE ChNPP report on pilot operation of the facility for release of materials from regulatory control was submitted for the IAEA review.

The cooperation and project implementation are continued in accordance with the Work Plan.

The project is funded by the EU in the framework of the Agreement on Funding the Annual Nuclear Safety Action Plan of 2014.

The main objective of the project was to provide recommendations and subsequently to develop technologies for processing the selected streams of the problematic radioactive waste into the forms acceptable for their long-term storage and/or disposal.

Project tasks:
1. Detailed analysis of the problematic RAW streams.
2. Characterization of the selected streams of problematic waste.
3. Feasibility Study of the potential technologies to process the problematic RAW.
4. Description of techniques, technical specifications for equipment and safety case.
5. Support to the End User during review of the elaborated documentation by a regulatory authority.
6. Final Report and dissemination of the project results.

In the part of the project within the responsibility of ChNPP, the results have been obtained as follows:
The filter perlite pulp was determined as a problematic RAW stream for the SSE ChNPP.
The strategy and methods for sampling and characterization of the problematic waste was agreed with and approved by the SNRIU. As per the approved methods the SSE ChNPP took the samples from 40 sampling points and formed 10 combined samples of LRW, they were characterized according their chemical and radionuclide content.
Resulting from the project, ChNPP obtained the Feasibility Study of the potential technologies to process the filter perlite pulp, technical specifications for equipment and safety case for processing the problematic RAW.


The project is funded through the IAEA Technical Cooperation Fund and its budget can be changed or redistributed if it is necessary.

Project objective:

Completing the establishment and ensuring efficient operation of integrated system for radioactive waste/SNF management in Ukraine that will enable to achieve safe managing (incl. disposal) the radioactive waste of all types including the waste accumulated within the previous years, being generated currently in the course of nuclear energy use as well as the waste that will arise in the future; enhancing the technological capabilities, improving efficiency and safety of decommissioning activities at Chornobyl NPP industrial site.

Completion status:

The project was completed in December 2019.

Within the project the SSE ChNPP as one of the recipients received the expert support of the IAEA in the area of decommissioning and RAW management, namely about the methods for determination of organic content in radioactively contaminated water, methods for sample taking and characterization of ChNPP solid RAW, ion exchanging resin treatment, status of “Implementation Programme for the Stage of Chornobyl NPP Power Units 1, 2 and 3 Final Shutdown and Preservation”.

The specialists were trained and participated in the fellowship programme studying the laboratory methods to determine the radionuclides in radioactively contaminated water and liquid RAW with use of mass-spectrometer.

Also, ChNPP received a state-of-the-art digital microscope for laboratory investigations.

Project No

Project title

(under the Contract)

Time frame


Specification of the waste forms to allow safe treatment, storage and disposal of radioactive waste held at the Ukrainian nuclear energy facilities.

Consortium led by Plejades GmbH- Independent Experts with involved Brenk Systemplanung GmbH and NUKEM Technologies (Germany)

Beginning: 2018-11-03
Completion: 2021-10-10


Project of ChNPP Cooling Pond Decommissioning


Beginning: 2013
Completion: 2019-07-04


Technical cooperation project “Support to Decommissioning of Nuclear Power Plant Units and Management of Radioactive Waste within the ChNPP Site and Exclusion Zone"

315 375 EUR

Beginning: 2018-01-01
Completion: 2019-12-31


Improvement of the national system of training in the area of radioactive waste management, decommissioning and rehabilitation of contaminated territories

988 422 EUR

Beginning: 2016-12-20
Completion: 2019-12-20


Creation of Facility for Release of Materials from Regulatory Control at ChNPP

2 552 979 EUR

Beginning: 2015-12-18
Completion: 2019-12-20


Completion of the Industrial Heating Plant construction
WBS 03.02.02

30 000 000 USD

Beginning: -
Completion: 2000-04-21


Chornobyl decommissioning Visualization Center creation and development,
NMFA 711

100 000 EUR

Beginning: 2014-01-01
Completion: 2015-12-31


Industrial Complex for Solid Radioactive Waste Management, Lots 1, 2

38 294 000 EUR

Beginning: 2001-03-05
Completion: 2009-02-25


Liquid Radioactive Waste Treatment Plant (LRTP)

37 079 270 EUR
2 491 540 USD

Beginning: 1999-09-16
Completion: 2018-04-13


Technical assistance on the site to Ukrainian organizations in Chornobyl NPP RAW Management facilities creation, monitoring within the Exclusion Zone and NPP equipment repair, 

5 245 750 EUR

Beginning: 2004-12-01
Completion: 2009-12-31


Complex for metal drums and reinforced concrete containers production for ChNPP Radioactive Waste storage U4.01/04W

5 568 050 EUR

Beginning: 2007-12-28
Completion: 2012-05-23


Additional work in the framework ICSRM project in Chornobyl. Delivery of the ventilation system for buildings 84, U.4.02/07A

400 000 EUR

Beginning: 2009-01-19
Completion: 2010-06-19


Support in the Radioactive Waste characterization and release from regulatory control in Ukraine, U4.01/10B + E

1 469 900 EUR

Beginning: 2014-04-18
Completion: 2017-01-18


Decommissioning Information Support System of Chornobyl NPP, U4.04/06

1 532 530 EUR

Beginning: 2009-05-26
Completion: 2012-02-25


Additional work in the framework ICSRM project in Chornobyl - support providing in licensing activities, as well as "hot" tests controlling, U4.02/07

1 390 000 EUR

Beginning: 2010-01-18
Completion: 2014-11-17


Improvement of the overall strategy for Radioactive Waste Management at operating and shutdown NPPs in Ukraine, U4.01/08-D

1 775 180 EUR

Beginning: 2012-06-30
Completion: 2015-08-20


Reconstruction of Transport and Process Equipments of the Interim Storage Facility for Spent Fuel (ISF-1)


Beginning: 2010
Completion: 2012


Creation of an industrial facility for ChNPP Water and liquid Radioactive Waste purification from transuranium elements and organic compounds - Stage I, 

1 769 493 EUR

Beginning: 2014-09-01
Completion: 20


Support in Radioactive Waste Management in Ukraine, U4.01/10 СDF

3 865 200 EUR

Beginning: 2014-04-16
Completion: 20




The project is financed from IAEA Technical Cooperation fund and its budget can be varied or redistributed if necessary.

Project Objective:

Assistance in Chornobyl nuclear power plant (NPP) decommissioning and the Shelter object transformation into environmentally safe system, as well as creation of Comprehensive National Radioactive Waste Management Program and Action Plan.

Completion status:

Within the period 2016-2017, the project activity was focused on the crucial for ChNPP problems of Radwaste Management, particularly Liquid Radioactive Waste, radioactively contaminated water and ion-exchange resins and on supporting of the work implementation during the Chornobyl NPP Final shutdown and preservation stage. During the two years, 13 expert missions, workshops and meetings were organized in accordance with the agreed work plan, attended by more than 200 specialists, mainly from Chernobyl nuclear power plant, NPP Safety Problems Institute, SNRIU, SSR Institute “Chornobyl Center”, and others. 19 specialists took part in ten International conferences and workshops where they had the opportunity not only to study the existing best practices, but also to share ChNPP’s developments in field of decommissioning and Radioactive Waste Management.

List of activities performed:






16 – 19.02.2016

Vienna, Austria

Expert mission "Processing of radioactively contaminated water and liquid radwaste contaminated with chemicals of dust suppressing mixtures and transuranic elements"


10 – 12.05.2016

Vienna, Austria

Coordination meeting on the results of UKR/9/033 project "Support to radioactive waste management and nuclear power plants decommissioning" in 2014-2015 and agreement of the plan for 2016-2017.


09 – 12.08.2016

Vienna, Austria

Workshop on ChNPP Salt Water Purification Technologies selection (without evaporation)


31.10 – 03.11.2016

Slavutych, Ukraine

Expert mission "Assessment of the revised Chornobyl NPP Decommissioning Program"


16 – 18.11.2016

Slavutych, Ukraine

Workshop "Reuse and modification of the intended purpose of empty facilities for decommissioning needs"


23 – 24.01.2017

Slavutych, Ukraine

Coordination meeting on implementation and planning of the project for 2017 and plans for a new cooperation cycle 2018-2019.


23 – 27.01.2017

Slavutych, Ukraine

Expert mission to review decontamination methods for dismantled equipment (small diameter pipes with internal contamination) and to obtain recommendations on the possibility of their use at Chornobyl NPP


23 – 27.01.2017

Slavutych, Ukraine

Expert mission on assessment of the revised Program for ChNPP Radioactive Waste Management


27.02 – 03.03.2017

Slavutych, Ukraine

Workshop "Risks Assessment during nuclear power plants decommissioning. Obtaining of knowledge on risk assessment methodology and risk management recommendation. IAEA initiated workshop was combined with a similar workshop within the RER9138 project, thus the workshop had the status of a regional


12 – 14.06.2017

Slavutych, Ukraine

Expert mission "Review of the technical solution for irradiated graphite management, including selection of container options and storage"


22 - 25.08.17

Vienna, Austria

Workshop on review of options to manage secondary waste (sludge), obtained from the facility for RAW purification from TUE and organic compounds


12 – 14.09.2017

Slavutych, Ukraine

Workshop on problems of scientific and technical support for NPP decommissioning


22 – 24.11. 2017

Slavutych, Ukraine

Expert mission "Analysis of consistency of existing and creating radioactive waste management facilities and radioactively contaminated equipment and materials according to the acceptance / transfer criteria at all stages of management"

Participation in the International conferences, workshops in field of decommissioning and radioactive waste management


21 – 23.09.2016

Kurchatov, Kazakhstan

Conference "Semipalatinsk Test Site: Radiation Heritage and Development Prospects"


11 – 14.09.2016

Ottawa, Canada

The third conference on decommissioning, radioactive waste management and environmental remediation


07 – 11.11.2016

Vienna, Austria

International Conference on Knowledge Management: Challenges and Approaches



07 - 10.11.2016

Cadarache, France

Annual meeting of the international network of laboratories for nuclear waste characterization (LABONET)


07 – 09.02.2017

Sarpsborg, Norway

Workshop "Methods used and innovative methods for optimizing safety and efficiency in decommissioning in the nuclear industry"


07 – 09.06.2017

Varna, Bulgaria

The traditional international nuclear energy conference "Nuclear Energy of Bulgaria - National, Regional and Global Energy Safety"


20 – 22.06.2017

Trnava, Slovakia

International Conference "Decommissioning in Eastern and Central Europe" (ECED)


29.10 – 03.11.17

Sydney, Australia

Symposium "Scientific basis for nuclear waste management"


07 – 09.11.2017

Berlin, Germany

10th International Symposium "Exemption from Regulatory Control. Requirements to retrieval and cleaning”


05 – 07.12.2017

Vienna, Austria

The annual forum of the international decommissioning network (IDN)


The results obtained, their impact on the industry:

The work in field of RAW management is aimed on creation of an effective system for different types waste management at Chornobyl NPP. In particular, it is very important from the point of view of resource saving to select the technologies for salt water treatment without evaporation method. At present Chornobyl NPP uses an evaporation scheme for the radioactive waters purification, designed for the Unit in operation. It is necessary to select the technologies allowing an effective Chornobyl NPP radioactive waters processing using the other methods. After the technology selection it is necessary to perform pilot tests to confirm the effectiveness of the proposed technology and its suitability for use at ChNPP. During the project implementation, alternative purification methods were considered and technical specification for the pilot facility was developed. Work continuation is planned within the new project for 2018-2019.

Expert support is provided and further research is underway to select options for secondary waste management, obtained from the facility for RAW purification from transuranic elements (TUE). This is continuation of the activity launched in 2012-2015, within which a pilot facility for the liquid radioactive waste purification from transuranium elements and organics was created and technical specifications were developed, which were used as a basis for the industrial facility in the EC project U4.01/11C aimed on the industrial facility creation. Now work is under way to find solutions to manage a secondary waste from this facility.

Significant efforts within the project were aimed to support Chornobyl NPP decommissioning, in particular, expert assessment of the revised "ChNPP decommissioning program" in terms of compliance with IAEA recommendations, workshop for studying of successful international practices for reuse of territory and plans for Chornobyl NPP site and repurposing of existing buildings and facilities for industrial development in the field of radioactively contaminated materials, radioactive waste and SNF management. Developed by IAEA expert group proposals and recommendations for ChNPP plans will form the basis for Chornobyl NPP site industrial development optimization and its integration in the Ukrainian nuclear complex.  


Nearest Events

April 26, 1986 (1.23.40 a.m., Moscow time) – accident at Chornobyl NPP Unit No.4 in the course of design testing of one of the safety-related systems
In the beginning of May, 1977 the assemblers, builders, servicemen and operational personnel of ChNPP begun precommissioning works at Unit 1

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