18.10.2018
KURSK NPP INFORMATION AND PUBLIC RELATIONS ADMINISTRATION
The first large-scale equipment for new power unit No 1 – a melt trap – was delivered to Kursk NPP-2 construction site
At the construction site of the VVER-TOI power unit No 1 of Kursk NPP-2 (a branch of Rosenergoatom JSC, a part of Rosatom’s Electric Energy Division) all parts of the core melt localization device (MLD)* – the so called melt traps – were delivered.
The melt trap for Kursk NPP-2 is the device of new generation. It is adapted for the relevant conditions of the site and safety requirements, has higher seismic resistance, hydrodynamic and impact resistance, as well as flood protection and simplified assembly technique.
Recently, 110 ton slide plate and 209 ton cantilever truss with the diameter of 9.5 m, as well as melt trap body – a lower part of the construction with the height of 6.5 m and the weight of 168 ton were delivered to the construction site. Especially for this, Ivanino-Makarovka route was blocked for vehicles in all directions.
“The transportation was carried out as planned, without complications”, the chief engineer of Capital Construction Department Nikolay Bobelev said. “By the end of December, 2018 we need to assemble all elements of the core melt localization device. Specifically for this operation heavy construction crane Demag CC 6800 will be delivered from Novovoronezh NPP.”
At the present time the parts of the melt trap are placed at the specially prepared concrete site before the reactor building No 1 of KuNPP-2. In the December it is planned to assemble the equipment in the reactor building.
For reference:
*MLD is a unique development of Russian nuclear specialists and is one of the most important safety systems of NPP. It is the special system of managing the non-project emergency. The melt trap is a shell that is installed under the reactor shaft. It is filled with the special materials that - if needed – will contain all materials of the reactor core, and provides its even distribution inside the trap. The device can hold a melt for an unlimited period of time keeping the radioactive materials from being released in the environment. This is a passive safety system; its action doesn’t depend on personnel qualification and circumstances; it obeys the fundamental laws of physics. For the first time, melt trap was installed at Tianwan NPP (China) constructed upon the Russian design. In Russia the traps are installed at the power units at Leningrad NPP-2 and Novovoronezh NPP-2.
Kursk NPP-2 is a replacement plant for the power units of the current operating Kursk NPP. It is planned to commission first two VVER-TOI power units of NPP-2 simultaneously with the decommissioning of the power units No 1 and 2 of the presently operating NPP. Rosenergoatom JSC is the developer and technical customer of the project. ASE JSC is the general designer and contractor.
VVER-TOI (Universal Optimized Digital power unit of VVER type) meets all modern Russian and International safety requirements, has longer service life and greater installed capacity in comparison with the reactors of the operating NPP.
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