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S molensk NPP is a nuclear power station, situated 3 km from the city Desnogorsk Smolensk region. Smolensk nuclear power plant - the largest power plants north-western region of the unified energy system of the country with capacity 3000 MW. 
 
The central reactor hall. The reactor is housed in reinforced concrete shaft sizes 21.6 х21, 6h25, 5 pm Mass
of the reactor is transferred to the concrete through the metal, which serve as both protection from radiation,
and together with the casing form a sealed cavity of the reactor - reactor space. Within the space of the
reactor is graphite stack of cylindrical shape with diameter 14 and height of 8 meters, consisting of a
collection of columns of block size 250h250h500 mm vertical holes for the channel in the center.
To prevent the oxidation of graphite and to improve the transfer issue of the graphite reactor coolant to the
space is filled with nitrogen-helium mixture. 
On your chest hang a special sensor to radiation.
The fuel in RBMK reactors used uranium dioxide U235.
In natural uranium contains 0.8% isotope U235.
To reduce the size of the reactor contents of U235 in the fuel prior to 2 or 2.4% on the enrichment plants.
Control room  
The main circulation pumps are designed to create the circulation of coolant in the primary circuit accident.
To enter , you need an helmet
In power plants you need of special socks, shoes, gowns, hats, gloves, and helmets 
The advantage of the RBMK reactors in the hull type, replacement of the spent fuel cartridges, which want
to stop the reactor, is the ability to transfer cassettes during reactor at nominal power.
Transhipment done unloading-loading machine (REM), which is controlled remotely.
The machine fits tightly with the upper part of the technological channel, the pressure in it equalized with
the pressure in the channel, then the spent fuel cartridge, and retrieved in its place installed the latest.
The design of REM provides reliable protection against biological radiation during overload condition in the
central hall is almost not changed.
When operating the reactor at nominal power per day are loaded, one-two fresh fuel cartridges.
The spent fuel is placed first in special pools extracts, which are located in the central hall, and then, as
they fill, will be transported to a separate storage facility for spent nuclear fuel.
A closed loop heat from the reactor is called the multiple forced circulation circuit (MCC).
It consists of two independent loops, each of which cools the reactor half. 
Fuel (fuel elements) is a zirconium tube of height 3.5 m and wall thickness of 0.9 mm, with inmates in a
88 mm wall thickness of 4 mm and the Office of the reactor being evenly distributed on reactor 211 rods
containing neutron absorbing water is delivered to the channels bottom washes with TVEL fuel cartridge is
installed in the technological channel. Number of channels in the reactor technology - 1661.
Radiation measurement
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