Authors & Affiliations

Blokhina A.N., Lyakishev S.L., Khalutin A.A.
Experimental and Design Organization "GIDROPRESS", Podolsk, Russia

Blokhina A.N. – Engineer-designer of the 2nd category, Experimental and Design Organization "GIDROPRESS". Contacts: 21, Ordzhonikidze st., Podolsk, Moscow region, Russia, 142103. Tel.: +7(4967) 65-29-18; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Lyakishev S.L. – Head of Department, Cand. Sci. (Tech.), Experimental and Design Organization "GIDROPRESS".
Khalutin A.A. – Engineer-designer of the 2nd category, Experimental and Design Organization "GIDROPRESS".

Abstract

In the article studied influence of coolant flow profile nonlinearity through straight-pipe steam generators tube assembly for fast neutron reactor with sodium coolant on heat exchange tubes strength. In last decade of atomic energy progress there is a stable tendency of fast neutron reactors with sodium coolant revival. BN-800 power unit has been started-up and operate successfully, BN-600 service life been extended, and more powerful plant with hull steam generator being designed. The choice of hull steam generator for new power units with fast neutron reactors with sodium coolant is conditioned with reducing weight-size characteristics of reactor plant’s main equipment. A high level of risk and severe effects of sodium-water steam generator’s heat exchange tubes depressurization leads to the need of calculation and experimental researches aimed at efficiency and reliability justification of steam generator’s construction in terms of heat exchange tubes strength assurance during the entire service life. To assess the impact of coolant flow profile nonlinearity through steam generators tube assembly on heat exchange tubes strength calculation model with seven tubes, simulating tube beam zones with different coolant flow rate, been designed. Temperature boundary conditions, when the distribution of coolant flow rate in the longitudinal section of the tube beam is uneven, been determined, temperature field and stress-strain state calculations for steam generator’s model were made. Based on the results nature of influence of coolant flow profile nonlinearity through steam generators tube assembly section on heat exchange tubes strength is shown, measures to reduce stress in heat exchange tubes and ensure the strength of steam generator are proposed.

Keywords
heat exchange tube, steam generator, sodium coolant, nonuniformity, analysis, velocity field, coolant flow, thermal field, stress-strained state, strengt

Article Text (PDF, in Russian)

References

UDC 621.18-9

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants", 2018, issue 3, 3:8