Rosatom delivered the first batch of fuel assembly simulators to Kursk NPP-2 under construction

The first of two batches of fuel assembly simulators (FAS), an exact copy of industrial fuel assemblies, was delivered to the fresh fuel storage building of Kursk NPP-2.

The delivered batch, manufactured by Novosibirsk Chemical Concentrates Plant (PJSC NZHK, an enterprise of Rosatom's Fuel Company TVEL), consists of 92 ITBCs. They are used for commissioning work on reactor plant equipment and transport and process equipment. In addition to the ITBCs, 51 simulators of absorbing rods of the control and protection system (CPSS) were delivered.

Delivery of ITBCs is an important stage in the preparation for the start-up of Unit 1: they are required for modelling the hydraulic parameters of the reactor plant during the tests at Substage A-3 "Cold and Hot Running-in of the Reactor Plant Equipment". During the run-in phase, the performance of the reactor plant equipment and safety systems will be checked in operating modes.

“The fuel assembly simulators were designed and manufactured specifically for VVER-TOI-type reactors, taking into account modelling of the core geometry and determination of real hydraulic characteristics. Structurally, they are fully identical to fuel assemblies, but they do not contain nuclear fuel. Loading of simulators into the reactor core is one of the final operations of preparation for CSF,” commented Alexander Uvakin, Director of Kursk NPP.

The reactor vessel of Unit 1 has already been fitted with internals, which will directly house the ITBCs and, during commercial operation, the fuel assemblies (FAs). According to the project, 163 fuel assemblies will be loaded into the core, 313 fuel elements (fuel elements) per fuel assembly. The length of one fuel assembly is 4,570 mm. A reloading machine will be used to install the fuel assemblies into the reactor core.

“ITVS were delivered by rail in specialised packing sets protecting them from shocks and damage during transportation. Preparations are currently underway to carry out incoming inspection. The transport operation with ITVS will allow us to work out the algorithm of actions according to the transport and technological scheme of nuclear fuel handling, check the equipment operability and prepare the personnel for acceptance of nuclear fuel,” said Oleg Shperle, Vice President of JSC Atomstroyexport, Project Director for the construction of Kursk NPP-2.