of the technology used
a nuclear installation serving temporary and safe storage of spent nuclear fuel from WWER
reactors prior to its further processing at reprocessing plant or prior to its final
disposal. It was commissioned in 1986.
The initial status of the facility has been described in the National Report of September
The interim spent fuel storage facility was upgraded to increase its storage capacity,
extend service life and raise its seismic resistance. The overall ISFSF storage capacity
following the upgrading and raising of seismic resistance has been tripled as compared to
the initially designed one. The capacity is being gradually increased by replacing the
original T-12 containers by compact containers, and will be sufficient to store all spent
nuclear fuel produced during the operation of NPP V-1 and V-2 units. Replacement of
containers is expected to be completed by 2007. A computer-controlled handling equipment
serves the purposes of moving spent fuel from original into new compact containers.
Raising of seismic resistance of the construction and technological parts was performed
according to the project in 1999.
Owing to the increased demands on removal of residual heat from spent fuel, the original
cooling system of pool waters has been replaced by a new one. The system consists of two
plate coolers (one being a 100% stand-by) and 4 pumps. Heat from cooling water is removed
of by an autonomous system of cooling water comprising 3 cooling micro-towers and 2
circulation pumps (one of them as a 100% stand-by).