naa a22 4500 510762220 CHVBK 20180411083143.0 cr unu---uuuuu 180411e20130501xx s 000 0 eng 10.1134/S0040601513050091 doi (NATIONALLICENCE)springer-10.1134/S0040601513050091 Preventing inadmissible erosion-corrosion thinning from occurring in the diffuser segments of feedwater supply control systems of power units at nuclear power stations equipped with RBMK-1000 reactors [Elektronische Daten] [G. Tomarov, A. Shipkov, T. Golubeva, P. Greblov] Results obtained from investigations of erosion-corrosion processes that occur during operation of the feedwater supply control systems used in power units of nuclear power stations equipped with RBMK-1000 reactors and the sensitivity of these processes to variations in the chemical composition of metal and in the flow path geometry are presented. It is found that local erosion-corrosion thinning of the walls in the diffuser segments of feedwater supply control systems occur mainly due to intense mass transfer in the near-wall region taken in combination with a low content of chromium. Hydrodynamic simulation was carried out, and it was shown based on its results that local erosion-corrosion thinning of the walls of pipeline segments downstream of the valves controlling the supply of feedwater to power units of nuclear power stations equipped with RBMK-1000 reactors can be prevented by subjecting them to appropriate modernization. It is found that the above mentioned diffuser parts can be made more resistant to erosion-corrosion wear by keeping the content of chromium in the main metal and weld joints at a level of no less than 0.25% and concurrently reducing the hydrodynamic effect in the zones of weld connections. Pleiades Publishing, Ltd., 2013 local erosion-corrosion nationallicence control valve nationallicence feed water nationallicence power unit nationallicence nuclear power station nationallicence Tomarov G. Geoterm-EM, ul. Lefortovskii Val 24, 111250, Moscow, Russia aut Shipkov A. Geoterm-EM, ul. Lefortovskii Val 24, 111250, Moscow, Russia aut Golubeva T. Geoterm-EM, ul. Lefortovskii Val 24, 111250, Moscow, Russia aut Greblov P. Geoterm-EM, ul. Lefortovskii Val 24, 111250, Moscow, Russia aut Thermal Engineering SP MAIK Nauka/Interperiodica 60/5(2013-05-01), 338-344 0040-6015 60:5<338 2013 60 11509 https://doi.org/10.1134/S0040601513050091 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0040601513050091 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tomarov G. Geoterm-EM, ul. Lefortovskii Val 24, 111250, Moscow, Russia aut NATIONALLICENCE 700 1- Shipkov A. Geoterm-EM, ul. Lefortovskii Val 24, 111250, Moscow, Russia aut NATIONALLICENCE 700 1- Golubeva T. Geoterm-EM, ul. Lefortovskii Val 24, 111250, Moscow, Russia aut NATIONALLICENCE 700 1- Greblov P. Geoterm-EM, ul. Lefortovskii Val 24, 111250, Moscow, Russia aut NATIONALLICENCE 773 0- Thermal Engineering SP MAIK Nauka/Interperiodica 60/5(2013-05-01), 338-344 0040-6015 60:5<338 2013 60 11509 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer