Authors & Affiliations

Sakhipgareev A.R., Morozov A.V.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia

Sakhipgareev A.R. – Junior Researcher, A.I. Leypunsky Institute for Physics and Power Engineering.
Morozov A.V. – Leading Researcher, Dr. Sci. (Tech.), A.I. Leypunsky Institute for Physics and Power Engineering. Contacts: 1, pl. Bondarenko, Obninsk, Kaluga region, Russia, 249033. Tel.: +7(484) 399-81-19; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..


The results of an analysis of the experimental data of the heat transfer processes in the removal of the noncondensable steam-gas mixture from the bundles of air cooled longitudinal finned tubes in the passive safety system of NNP with WWER is considered in the article. The experiments were performed on the test facility with the working section "Gas removal device" with the parameters specific to the primary circuit of the reactor facility in 24 hours after the accident initiation. The nitrogen and the helium were used in the steam-gas mixture, as the non-condensable gases. The hydrogen was replaced of the helium for safety reasons.
It was established that the condensation capability of the model of the gas removal device in an ex-periment without steam-gas mixture removal is reduced to zero after gas supply for ~890 seconds. In an experiment with steam-gas mixture removal, the maintenance of the condensation capability is possible during the experiment.
The obtained data can be used for the numerical simulation of emergency processes in the WWER reactor facility during operation of the passive safety systems (the HA-2 system, passive heat removal system), with regard to the operation of the non-condensable gases removal device.

WWER, steam generator, condensation mode, condensation in vertical tubes, air heat exchanger, non-condensable gases, steam-gas mixture

Article Text (PDF, in Russian)


UDC 536.423

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2018, issue 4, 4:8