ХОЯТ-2Interim Spent Nuclear Fuel Dry Storage Facility (ISF-2) construction progress

ISF-2 construction is financed from Nuclear Safety Account in European Bank for Reconstruction and Development (EBRD).

ISF-2 Facility is intended for Spent Fuel Assemblies (SFA) and Additional Absorbers (AA), currently stored at Chernobyl NPP, acceptance, preparation for storage and storage.

ISF-2 Facility capacity:
ISF-2 will provide acceptance for storage, preparation for storage and storage within 100 years more than 21000 SFA RBMK-1000 with productivity 2500 SFA per year.

ISF-2 will consist of 2 parts:

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1. Spent Fuel Processing Facility (SFPF)
SFPF function is preparation for storage and packing of more than 21 thousand SFAs, about 2 thousand AAs and more than 23 thousand extension roads, transported from ChNPP Units 1, 2, 3 and from ISF-1. The facility is designed to ensure the minimal annual capacity for processing of 2500 SFAs or AAs.

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2. Spent Fuel Storage Zone (SFSZ)
Following operations is carrying out in SFSZ:
• Transportation of the canisters, filled with Spent Nuclear Fuel from SFPF in SFSZ with canisters manipulation and transportation system (CMTS);
• loading of canisters into horizontal concrete storage modules (CSM) with a design life-time 100 years.
• Storage of canisters with Nuclear Fuel within 100 years.

On September 17, 2007, a contract was signed with “Holtec International” Company (USA) for “Completion of the Interim Spent Nuclear Fuel Dry Storage Facility at the Chernobyl NPP site”.

According to the terms and conditions of the Contract the project is implemented in two stages – design and construction. The first stage of the project was completed in June 2010.

On February 16, 2011, Amendment No. 4 was signed to the Contract with “Holtec International” for implementation of the work stage under Authorization 2 (supply of materials and equipment, building and assembling works, holding of pre-commissioning tests, support of obtaining authorization for ISF-2 commissioning).

Positive conclusion of the state comprehensive expert review was obtained on December 30, 2012, and the ISF-2 Construction Completion Design has been approved.

The updated License for implementing the work “construction and commissioning of a nuclear facility (spent nuclear fuel storage facility (ISF-2)) was obtained on February 20, 2013.

Contract agreement between “Holtec International” for one part and LLC “UTEM-Engineering” and “Ukrtransbud” Corporation for the other part was signed on August 18, 2014 for providing services related to implementation and completion of construction, assembling and acceptance activities at the ISF-2 site (“UTEM-Engineering” performs the functions of the Construction General Contractor).

The work scope under the Contract includes the design, manufacturing, supply of materials and equipment, construction and installation works, pre-commissioning tests, as well as support of the Employer at the stage of ISF-2 commissioning.

The work related to review and update of documentation on ISF-2 safety important equipment and Preliminary Safety Analysis Report rev.7.0 (PSAR) is underway in the manner of working interface with the State Nuclear Regulatory Inspectorate of Ukraine/State Scientific and Technical Center for Nuclear and Radiation Safety and the Contractor.

To the date, the conclusions of the State Nuclear and Radiation Safety expertise have been obtained for all technical specifications of safety important equipment, for all technical specifications of safety important systems, and for all plant acceptance test of safety important equipment.

Manufacturing of double-wall shielded canisters (DWSC) is underway at the Holtec International (Pittsburgh, USA) factory. 150 DWSC and 27900 fuel tubes (FT), 186 auxiliary FTs and 186 additional fuel Tubes have already been delivered at Chernobyl NPP.

Delivery of safety important equipment, safety important systems elements, and equipment not important for safety to ISF-2 site is close to completion.

The first stage of ISF-2 comprehensive tests with SFA simulators was started 01.08.2017 in accordance with the approved program. According to the current schedule, its completion is planned for March 2018. "Hot" test with Spent Fuel Assemblies is planned to be performed from June 2018 within the three months period. Work completion under Permit 2, stipulating delivery of all canisters at ISF-2, is scheduled for December 2018.

As of December 2017, the level of construction and installation works completion is 99%, the level of works performance under Permit 2 is 98.1%.

For information.

Spent Fuel Assemblies are stored at Chernobyl NPP in "wet type" storage facility (ISF-1) and in cooling pools at Units 1 and 2.

During the whole period of operation Chernobyl NPP accumulated more than 21 thousand nuclear fuel assemblies
at its site .

The design capacity and design lifetime of possible safe operation of ISF-1 do not allow placing all SFAs being available at ChNPP for long-term storage. This determined the necessity to construct a new spent nuclear fuel storage facility (ISF-2).


20.12.1995 Memorandum of Understanding between Governments of G7 countries, Commission of European Community and Government of Ukraine about Chernobyl NPP shutdown was signed.

According to the Comprehensive Program of Chernobyl NPP decommissioning, Interim Storage Facility (ISF-2) for Spent Nuclear Fuel is the condition for transition to the second stage of Chernobyl NPP decommissioning.

With the purpose to discharge ISF-1 and ChNPP Units from the Spent Nuclear Fuel and Spent Additional Absorbers, Cabinet of Ministers of Ukraine issued Resolution dated November 29, 2000 No 1747 about necessity to construct Dry Type Storage Facility for Spent Nuclear Fuel.

Taking into account available in Ukraine and global experience of SF Management, as result of open international tender, the dry storage in the tight canister located in ventilated concrete modules has been chosen for Chernobyl NPP’s SF.

12.11.1996 Grant Agreement No006 was signed between European Bank for Reconstruction and Development (EBRD), Government of Ukraine and Chernobyl NPP which was ratified by Verkhovna Rada of Ukraine 18.03.1997. The purpose of this Agreement is financing of facilities construction intended for Chernobyl NPP decommissioning, including Interim Storage Facility (ISF-2).

18.07.2007. Decision about Contract awarding to Holtec Int. Company for completion of Spent Nuclear Fuel Storage Facility construction and about funds allocation for this Project completion was made at Nuclear Safety Account Donors Assembly meeting.

17.09.2007. Contract for completion of Spent Nuclear Fuel Storage Facility construction was signed with Holtec Int. Company.

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