In compliance with the Federal target programme “Nuclear Energy Technologies of New Generation for 2010-2015 and for the Future Prospect up to 2020”  a new generation vessel-type SG design for BN-1200 RP is being developed at OKB “GIDROPRESS”.
During the BN-1200 RP SG design development the results of the designing, calculated and experimental justification of BOR-60, BN-350, BN-600 and BN-800 SG designs and also foreign experience in the vessel-type SG development is mostly used.
As a part of BN-1200 RP four steam generators are used at the Unit, one steam generator for each loop.

Each steam generator consists of two modules.

SG module is a vertical heat-exchanger combining the boiler and superheater function with the straight heat-exchanging tubes and vessel temperature expansion compensator. 

SG design shall provide:

 - Minimal materials consumption;
 - Reliable and safe operation during the assigned service life at the given parameters of the working medium (steam-water) and coolant (sodium);
 - Maintainability and control of state of the base metal and welded joint metal in-situ;
 - Adaptability to manufacture and simplicity of mounting (dismantling) in the SG compartments.