SU793175A1 - Method of deactivating metal surfaces - Google Patents
Method of deactivating metal surfaces Download PDFInfo
- Publication number
- SU793175A1 SU793175A1 SU792834195A SU2834195A SU793175A1 SU 793175 A1 SU793175 A1 SU 793175A1 SU 792834195 A SU792834195 A SU 792834195A SU 2834195 A SU2834195 A SU 2834195A SU 793175 A1 SU793175 A1 SU 793175A1
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- SU
- USSR - Soviet Union
- Prior art keywords
- solution
- metal surfaces
- deposits
- deactivating
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
Изобретение относитс к области атомной энергетики, а также к тепловой энергетике и другим област м народного хоз йства, где необходимо удаление отложений с металпических конструкций и защита их от коррозии.The invention relates to the field of nuclear energy, as well as to thermal energy and other areas of national economy, where it is necessary to remove deposits from metal structures and to protect them from corrosion.
Существует р д способов удалени отложений с поверхностей, металлических конструкций, например, очистку внутренних поверхностей водоохлаждаемого дерного реактора от радиоактивных отложений можно осуществл ть, добавл в теппоноситепь перекись водорода , котора раствор ет радиоактивные осадки, затем теплоноситель пропускают через деминерализатор, после чего возвращают в контур,There are a number of methods for removing deposits from surfaces, metal structures, for example, cleaning the internal surfaces of a water-cooled nuclear reactor from radioactive deposits can be done by adding hydrogen peroxide to the thermal substrate, which dissolves the radioactive precipitates, then the coolant is passed through a demineralizer, and then returned to the circuit ,
Ближайшим к за вл емому вл етс двухстадийный способ дезактивации оборудовани реакторов, охлаждаем 1Х водой, заключающийс в обработке поверхностей дезактивирующим раствором при нагреве.The closest to the claimed is a two-stage method of decontamination of equipment of reactors, cooled 1X with water, which consists in treating surfaces with decontamination solution during heating.
На первой стадии оборудование об (Л рабатываетс окислителем - раствором перманганата Щелочного металла, затем промывают и на второй стадии обраба- тывают кислым (рН 3) раствором цитрата или оксалата с ингибитором - солью In the first stage, the equipment is volatile (L is processed by an oxidizing agent — an alkali metal permanganate solution; then it is washed and, in the second stage, treated with an acidic (pH 3) solution of citrate or oxalate with an inhibitor salt
органической кислоты двух- или трех ;о со валентного металла.organic acid of two or three; o with a valent metal.
В известном способе удалени отложений используютс два раствора, In a known method of removing deposits, two solutions are used,
СП т.е.в этом случае объем растворов после использовани равен двум объемам контура, которые перед сбросом в спецканализацию необходимо очистить.The SP, i.e., in this case, the volume of solutions after use is equal to two volumes of the circuit, which must be cleaned before being discharged into the special sewer.
Удаление отложений этим способом не обеспечивает устранени по влени новых отложений за счет коррозии оборудовани , что приводит к росту радиоактивности контуров АЭС и ухудшению теплообмена на тегшопередающих поверхност х и ухудшение гидpoдинa «ки в трубопроводах и оборудовании АЭС.The removal of deposits by this method does not ensure the elimination of the appearance of deposits due to equipment corrosion, which leads to an increase in the radioactivity of the NPP circuits and the deterioration of heat transfer to the tag-transfer surfaces and the deterioration of the hydraulic fluid in the pipelines and equipment of the NPP.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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SU792834195A SU793175A1 (en) | 1979-10-30 | 1979-10-30 | Method of deactivating metal surfaces |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792834195A SU793175A1 (en) | 1979-10-30 | 1979-10-30 | Method of deactivating metal surfaces |
Publications (1)
Publication Number | Publication Date |
---|---|
SU793175A1 true SU793175A1 (en) | 1989-06-23 |
Family
ID=20856855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU792834195A SU793175A1 (en) | 1979-10-30 | 1979-10-30 | Method of deactivating metal surfaces |
Country Status (1)
Country | Link |
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SU (1) | SU793175A1 (en) |
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1979
- 1979-10-30 SU SU792834195A patent/SU793175A1/en active
Non-Patent Citations (1)
Title |
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Патент GB № 1516914, кл. G 6 С, опублйк. 1978. Патент СМА 3496017, кл. 134-2, опублйк. J 9 70. * |
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