Authors & Affiliations

Zagorulko Y.I., Ganichev N.S., Konovalov M.A.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia

Zagorulko Y.I. – Leading Researcher, Cand. Sci. (Techn.), A.I. Leypunsky Institute for Physics and Power Engineering. Contacts: 1, pl. Bondarenko, Obninsk, Kaluga region, Russia, 249033. Tel.: +7(484) 399-80-84; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Ganichev N.S. – Head of laboratory, A.I. Leypunsky Institute for Physics and Power Engineering.
Konovalov M.A. – thermal engineer 2 categories, A.I. Leypunsky Institute for Physics and Power Engineering.

Abstract

At simulation of carbon thermodynamic activity distribution in sodium nonisothermal circulation circuit there are necessary quantitative characteristics of mass-exchange between carbon particulate phase, carbon deposits on the circuit walls and carbon in sodium solution. In particular, one needs to know carbon dissolution rates in dependence on temperature and flowing around hydrodynamic regimes at the boundary of the dissoluted bodies. In the report, there are presented results of experimental measurements of graphite dissolution rate in laminar flow of sodium. Sodium temperature and characteristic dimensions of the dissoluted graphite samples were selected to be varied experimental parameters at practically identical values of sodium flow rate in a series of investigation. Increase of carbon concentration in sodium flow was measured by means of equilibrium tabs method. There were used equilibrium tabs made of alloys Fe-11.6Mn and Fe-20Mn, characteristic by high values of carbon equilibrium distribution coefficients in the system “sodium-tabs materials”. From experimental results processing and analysis it follows that data good enough (with deviation of 5—7 %) represented known correlation for plate dissolution in laminar flow with utmost deviation for plate samples of 0.1 m length.

Keywords
graphite, sodium, masstransfer, dissolution, kinetics, Fe-Mn alloys, equilibrium tabs, dissolution rate coefficient

Article Text (PDF, in Russian)

References

UDC 621.039.5

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2018, issue 5, 5:14