SU793175A1 - Method of deactivating metal surfaces - Google Patents

Method of deactivating metal surfaces Download PDF

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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
order
Prior art date
Application number
SU792834195A
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Russian (ru)
Inventor
А.Ф. Чабак
Original Assignee
Предприятие П/Я А-1758
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Priority to SU792834195A priority Critical patent/SU793175A1/en
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Publication of SU793175A1 publication Critical patent/SU793175A1/en

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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)

1. СПОСОБ ДЕЗАКТИВАЦИИ МЕТАЛЛИЧЕСКИХ ПОВЕРХНОСТЕЙ, закпючаю.щийся в обработке поверхностей дез-1. METHOD FOR DEACTIVATION OF METAL SURFACES, which is hidden in the surface treatment of 2 активирующим раствором при нагреве, отличающийся тем, что, с целью упрощения способа, в качестве дезактивирующего раствора используют кислый раствор восстановителя.2 with an activating solution during heating, characterized in that, in order to simplify the method, an acid reducing solution is used as the deactivating solution. 2, Способ поп. 1, отличающийся тем, что, с целью снижения скорости образования радиоактивных отложений после дезактивации, производят нанесение на поверхность защитной пленки путем введения в раствор соли никеля.2, the method of pop. 1, characterized in that, in order to reduce the rate of formation of radioactive deposits after decontamination, a protective film is applied to the surface by introducing nickel salt into the solution.
SU792834195A 1979-10-30 1979-10-30 Method of deactivating metal surfaces SU793175A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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

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SU792834195A SU793175A1 (en) 1979-10-30 1979-10-30 Method of deactivating metal surfaces

Country Status (1)

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SU (1) SU793175A1 (en)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Патент GB № 1516914, кл. G 6 С, опублйк. 1978. Патент СМА 3496017, кл. 134-2, опублйк. J 9 70. *

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