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

被引：2

作者：

Tomarov G.V. ^{[1
]}

Shipkov A.A. ^{[1
]}

Golubeva T.N. ^{[1
]}

Greblov P.N. ^{[1
]}

机构：

[1] Geoterm-EM, Moscow 111250

来源：

Thermal Engineering (English translation of Teploenergetika) | 2013年 / 60卷 / 05期

关键词：

control valve; feed water; local erosion-corrosion; nuclear power station; power unit;

D O I：

10.1134/S0040601513050091

中图分类号：

学科分类号：

摘要：

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. © 2013 Pleiades Publishing, Ltd.

引用

页码：338 / 344

页数：6

共 5 条

[1]

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[2]

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[3]

Tomarov G.V., Shipkov A.A., Koreshkova N.S., Calculated and Experimental Substantiation of Operating Conditions under Which Adequate Erosion Resistance of Valves Used in Power Units at Nuclear Power Stations Is Ensured, Therm. Eng., No. 5, (2011)

[4]

Tomarov G.V., Shipkov A.A., Golubeva T.N., Et al., Problems Concerned with Local Erosion-Corrosion of Welded Connections in the Pipelines of a Power Unit at a Nuclear Power Station, Therm. Eng., No. 8, (2012)

[5]

Povarov O.A., Tomarov G.V., Gontarenko A.F., Et al., Erosion-Corrosion Wear of the Metal of Elements Used in the Turbine Units of Thermal and Nuclear Power Stations: A Review, (1991)

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