Authors & Affiliations
Lebezov A.A., Kuzina Yu.A., Morozov A.V.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia
Lebezov A.A. – Director General.
Kuzina Yu.A. – Head of the Department of Nuclear Energy, Can. Sci. (Tech.).
Morozov A.V. – Leading Researcher, Dr. Sci. (Tech.). Contacts: 1, pl. Bondarenko, Obninsk, Kaluga region, Russia, 249033. Tel.: +7 (484) 399-81-19; e-mail:
Abstract
The paper is devoted to the use of liquid boron compounds in water-cooled pressurized reactors in our country and abroad. The history of the development of boron control technology is considered on the example of domestic pressurized water reactors, starting with VVER-1. The fundamentals of the use of boric acid in safety systems of various reactor installations are outlined. The evolution of the use of boron compounds in the core flooding systems of PWR and VVER reactors, using both active and passive operating principles, is considered. Problems associated with the cooling of the reactor core with boron compounds, associated with both dilution and crystallization of boric acid, have been identified. Various scenarios associated with non-uniform heterogeneous dilution of boric acid in the core are presented. The main results of the performed computational and experimental works aimed at studying the mass transfer of boric acid in the core are considered. The experience of solving the problem of accumulation and crystallization of boric acid in modern foreign reactors of the PWR type is analyzed. Based on the analysis carried out, recommendations are formulated and the main directions for studying the thermophysical properties and mass transfer of boric acid in relation to promising projects of domestic pressurized water reactors to ensure long-term efficient operation of passive safety systems are outlined.
Keywords
VVER, PWR, boric acid, regulation, core, dilution, crystallization
Article Text (PDF, in Russian)
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