EDN: MNMQIJ
Authors & Affiliations
Lebezov A.A., Morozov A.V., Sakhipgareev A.R.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia
Lebezov A.A. – Director General.
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: This email address is being protected from spambots. You need JavaScript enabled to view it..
Sakhipgareev A.R. – Junior Researcher.
Abstract
The paper presents the results of experimental and computational studies aimed at substantiating the possibility of increasing the duration of autonomous operation of passive safety systems of a WWER reactor plant. In the course of research conducted at IPPE JSC, two processes were studied that have a significant impact on the efficiency of these systems: the generation of non-condensable gases and the accumulation of boric acid in the reactor core. As part of the work carried out, a calculation was carried out to assess the influence of the solubility of boric acid in the steam leaving the reactor operating in emergency boiling mode on the possibility of crystallization of boric acid in the core. At an experimental facility, the process of contact condensation of steam on a stream of subcooled liquid with parameters typical for a WWER reactor plant one day after the start of an accident associated with the rupture of the main circulation pipeline was studied. The supply of jets of liquid into the volume of tanks of the second stage system filled with a vapor-gas mixture can be used to maintain the operation of WWER steam generators in the steam condensation mode, which ensures a long-term supply of coolant to the reactor in an emergency. The results of the research can be used to substantiate the performance of WWER passive safety systems, as well as to verify computer codes.
Keywords
WWER, passive safety systems, heat and mass transfer, boric acid, crystallization, non-condensable gases, condensation
Article Text (PDF, in Russian)
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UDC 621.039.58:536.423.4
Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2024, no. 1, 1:10
