Approaches to Safety Justification for Loading of VSC-VVER Containers in ZNPP DSFSF


dry spent fuel storage facility, dry ventilated storage container, Ukrainian NPPs, alternative nuclear fuel

How to Cite

Kostiushko, Y., Dudka, O., Kovbasenko, Y., & Shepitchak, A. (2019). Approaches to Safety Justification for Loading of VSC-VVER Containers in ZNPP DSFSF. Nuclear and Radiation Safety, (4(84), 82-87.


The introduction of new fuel for nuclear power plants in Ukraine is related to obtaining a relevant license from the regulatory authority for nuclear and radiation safety of Ukraine. The same approach is used for spent nuclear fuel (SNF) management system. The dry spent fuel storage facility (DSFSF) is the first nuclear facility created for intermediate dry storage of SNF in Ukraine. According to the design based on dry ventilated container storage technology by Sierra Nuclear Corporation and Duke Engineering and Services, ventilated storage containers (VSC-VVER) filled with SNF of VVER-1000 are used, which are located on a special open concrete site. Containers VSC-VVER are modernized VSC-24 containers customized for hexagonal VVER-1000 spent fuel assemblies.

The storage safety assessment methodology was created and improved directly during the licensing process. In addition, in accordance with the Energy Strategy of Ukraine up to 2035, one of the key task is the further diversification of nuclear fuel suppliers. Within the framework of the Executive Agreement between the Government of Ukraine and the U.S. Government, activities have been underway since 2000 on the introduction of Westinghouse fuel. The purpose of this project is to develop, supply and qualify alternative nuclear fuel compatible with fuel produced in Russia for Ukrainian NPPs. In addition, a supplementary approach to safety analysis report is being developed to justify feasibility of loading new fuel into the DSFSF containers. The stated results should demonstrate the fulfillment of design criteria under normal operating conditions, abnormal conditions and design-basis accidents of DSFSF components.  Thus, the paper highlights both the main problems of DSFSF licensing and obtaining permission for placing new fuel types in DSFSF.


1. IAEA-TECDOC-1100. Survey of wet and dry spent fuel storage. International Atomic Energy Agency, July 1999.

2. Certificate of Compliance Renewal Application for the VSC-24 Ventilated Storage Cask System. Docket No. 72-1007, Document No. VSC-04.1 100, Revision 0, 2012.

3. SOU NAEK 099:2015. Nuclear fuel handling. Radiation characteristics and residual energy release of spent fuel assemblies VVER-1000. Kyiv, NNEGC «Energoatom».

4. Regulatory Guide 3.34. Spent fuel heat generation in an independent spent fuel storage installation. Revision 1, U.S. Nuclear Regulatory Commission, 1999.

5. PNAE G-14-029-91. Safety Rules for Storage and Transport of Nuclear Fuel at Nuclear Facilities. Approved by GPAN USSR, 1991.

6. Kovbasenko, Yu., Dudka, E., Kostyushko, Ya. (2011). Experience in licensing loading of containers at Zaporizhzhya NPP dry spent fuel storage facility. Nuclear and Radiation Safety Journal, 1(49), pp. 21-26.

7. NP 306.2.221-2019. Safety requirements for nuclear fuel management. Approved by SNRIU Order No. 269 dated 21 July 2019 registered in the Ministry of Justice on 30 June 2019 under No. 833/33804 [in Ukrainian].