THE METHOD OF CORIUM COOLING IN A CORE CATCHER OF A LIGHT-WATER NUCLEAR REACTOR

Skakov M.K. Toleubekov K.O. Baklanov V.V. Gradoboev A.V. Akayev A.S. Bekmuldin M.K.
2022 E.A. Buketov Karaganda University Publish house

Eurasian Physical Technical Journal
2022 #19 Issue 3 69 - 77 pp.

During the development of a severe accident at nuclear power plant with a core melting, corium is formed. One of the main barriers preventing outflow of corium into the environment is a melt localization device or a melt trap. The melt trap must accept and prevent the corium parameters from exceeding critical values, ensuring its retention in a controlled volume and cooling. For this reason, melt traps are subject to serious requirements regarding cooling methods to ensure effective containment of the melt in the core of a nuclear reactor. In the presented article, experimental studies of the interaction between corium and water, which was supplied to the surface of the corium in a melt trap for its cooling, were analyzed. As a result of the work, a number of significant problems associated with the low efficiency of this cooling method were identified, and possible ways to eliminate them were considered. A solution is proposed for optimizing the method of corium cooling in a melt trap, as well as for the scope of research on the possibility of implementing the proposed method in practice and analyzing its effectiveness using the VCG-135 test-bench and the Lava-B facility.

core catcher , corium , hydrogen generation , Lava-B facility , safety , severe accident , steam exposure , VCG-135 test-bench

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National Nuclear Center of the Republic of Kazakhstan, Kurchatov, Kazakhstan
Institute of Atomic Energy NNC RK, Kurchatov, Kazakhstan
Shakarim University, Semey, Kazakhstan
National Research Tomsk Polytechnic University, Tomsk, Russian Federation

National Nuclear Center of the Republic of Kazakhstan
Institute of Atomic Energy NNC RK
Shakarim University
National Research Tomsk Polytechnic University

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