SUBSTANTIATION OF THE BASIC TOOLS FOR THE CONTROL OF IMPURITIES IN SODIUM FOR IN-VESSEL APPLICATION IN PERSPECTIVE FAST
REACTORS

EDN: BLPCXE

Authors & Affiliations

Alekseev V.V., Sorokin A.P., Kuzina Yu.A.
A.I. Leypunsky Institute of Physics and Power Engineering, Obninsk, Russia

Alekseev V.V. – Chief Researcher, Dr. Sci. (Tech.). Contacts: 1, Bondarenko sq., Obninsk, Kaluga region, 249033. Tel.: +7 (484) 399-42-34; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Sorokin A.P. – Chief Researcher, Dr. Sci. (Tech.).
Kuzina Yu.A. – Director of Nuclear Energetic Department, Cand. Sci. (Tech.), A.I. Leypunsky Institute for Physics and Power Engineering.

Abstract

To select the performance and capacity of coolant purification systems, to develop requirements for impurity control systems, it is necessary to assess the intensity of all potential sources of impurities and predict their impact on the operation of installations during a given resource. Quantitative estimates of impurities entering the coolant (oxygen, hydrogen, carbon) during the preparatory and commissioning works, including sodium supply, installation pollution, and the initial period of operation, can be performed with sufficient reliability for practice. Due to the increase in the intensity of impurity sources during NPP operation at rated power with increased coolant parameters, more complete impurity control is required. The tasks of operational control of these impurities are to maintain acceptable levels of impurities in the coolant, timely detection of deviations from the nominal operating regimes and prevention of emergency situations. To control impurities in sodium coolant, a significant number of intermittent and continuous devices based on various physical and chemical principles have been developed. A description of a number of sodium impurity control devices used in modern plants is given. Taking into account the state of development of means for monitoring impurities in sodium coolant and shielding gas, as well as the experience of using devices in reactor plants and experimental stands, achieved in recent years, the necessary set of means for monitoring impurities in sodium and gas cavity for their in-vessel placement was determined in the tank of a promising sodium reactor.

Keywords
sodium coolant, impurities, control devices, temperature, oxygen, hydrogen, corrosion products, shielding gas, cork indicator, diffusion membrane

Article Text (PDF, in Russian)

References

UDC 621.03921

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2022, issue 2, 1:18