EP0060314B1 - Procédé pour décontaminer des objets - Google Patents

Procédé pour décontaminer des objets Download PDF

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Publication number
EP0060314B1
EP0060314B1 EP19810102007 EP81102007A EP0060314B1 EP 0060314 B1 EP0060314 B1 EP 0060314B1 EP 19810102007 EP19810102007 EP 19810102007 EP 81102007 A EP81102007 A EP 81102007A EP 0060314 B1 EP0060314 B1 EP 0060314B1
Authority
EP
European Patent Office
Prior art keywords
layer
contamination
carrier layer
adhesion
bonding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19810102007
Other languages
German (de)
English (en)
Other versions
EP0060314A1 (fr
Inventor
Herbert Dr. Chem. Münnich
Eberhard Dr. Ing. Fischer
Günter Dr. Schröder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Bechem GmbH
Deutsche Gesellschaft fuer Wiederaufarbeitung von Kernbrennstoffen mbH
Original Assignee
Carl Bechem GmbH
Deutsche Gesellschaft fuer Wiederaufarbeitung von Kernbrennstoffen mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carl Bechem GmbH, Deutsche Gesellschaft fuer Wiederaufarbeitung von Kernbrennstoffen mbH filed Critical Carl Bechem GmbH
Priority to DE8181102007T priority Critical patent/DE3172473D1/de
Priority to EP19810102007 priority patent/EP0060314B1/fr
Priority to JP4097282A priority patent/JPS57161700A/ja
Publication of EP0060314A1 publication Critical patent/EP0060314A1/fr
Application granted granted Critical
Publication of EP0060314B1 publication Critical patent/EP0060314B1/fr
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/001—Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • US-A-2 877 131 relates to a method for coating objects with a water-soluble substance for protecting and decontaminating the surface of these objects.
  • the substance is sprayed on or brushed on. It preferably consists of a mixture of a water-soluble carbohydrate and water and an additive consisting of a hygroscopic agent. After radioactive contamination, the coating with the radioactive contamination adhering to it is washed off. In this known method, only a single layer is applied, which is washed off together with the contaminants after the contamination. This process is disadvantageous because the washing water is secondary waste, which has to be removed again at great expense.
  • FR-A-1 303 673 relates to a cleaning agent and a method for cleaning objects contaminated with radioactive substances.
  • the cleaning agent consists of a mixture of a cleaning compound and a liquid material that hardens by drying, vulcanizing or polymerizing to form a flexible and adhesive film that can be removed from the surface to which the mixture is applied.
  • the cleaning agent can also be mixed with an abrasive.
  • the cleaning agent layer is applied to the surface of the objects by spraying or brushing after the surface has been contaminated. After the film has been formed, the film is pulled off the object.
  • an additional amount of the same mixture is applied as a second layer directly to the first layer after the first film formation for reinforcement. The second layer forms another new film.
  • the present invention is therefore based on the object of specifying a method with which inorganic materials deposited, applied or adhered to surfaces of objects, for example metallic and non-metallic surfaces, bodies and apparatus such as cells, machines, tools, devices, building parts, vehicles, etc. or organic, in particular radioactive or toxic substances or living organisms can be safely removed.
  • objects for example metallic and non-metallic surfaces, bodies and apparatus such as cells, machines, tools, devices, building parts, vehicles, etc. or organic, in particular radioactive or toxic substances or living organisms can be safely removed.
  • the invention enables safe and rapid decontamination of the surface of objects.
  • radioactive contamination for example from process equipment and cell walls, can be eliminated safely and quickly, inexpensively and with significantly reduced radiation exposure for the personnel, in comparison to conventional methods.
  • a secondary waste for example from detergents, such as occurs in the process according to US-A-2877131, no longer occurs in the process according to the invention.
  • the method according to the invention is not very time-consuming and requires negligible downtimes.
  • the decontaminated surfaces can be re-coated with a new contamination carrier layer immediately after removal of the contamination-containing multiple layer (layer package) and are thus very quickly available again for operational use.
  • the personnel involved in the decontamination and the subsequent removal of the cleaning waste are frequently exposed to health hazards in the previous methods, which are largely eliminated in the present invention, since the harmful materials are firmly integrated between the layers and back contamination is prevented.
  • the process is essentially chemical-mechanical and can be easily automated.
  • 1 to 5 show the individual method steps of applying and removing the individual layers.
  • a dense contamination carrier layer 6 is applied to the surfaces of an object 2 to be treated in a suitable manner, for example by spraying, dipping, gluing, painting, welding, etc. (FIG. 1).
  • the surfaces in question are previously prepared or pretreated in such a way that a defined connection or adhesion corresponding to the respective area of application is achieved between them and the contamination carrier layer 6.
  • a layer 4 for example a primer, is applied to the object 2 to impart the connection or adhesion.
  • the pretreatment of the surfaces can also be carried out, for example, by removing material, by chemical conversion of the molecular interfaces or the like. It only has to be ensured that an adequate connection or liability is thereby conveyed.
  • a further dense, covering packaging layer 10 is applied to the contaminated carrier layer 6 in a suitable manner, for example by spraying, dipping, brushing, gluing, welding, etc. (FIG. 3 ).
  • a material is used for the contamination carrier layer 6, through which a special physicochemical mechanism of action is triggered. This is based on a molecular interaction between the layer 10 and the layer 6 and between the layer 6 and the layer 4, thereby causing an intensive connection or adhesion between the packaging layer 10 and the connection or adhesion-imparting layer 4 and at the same time lifting the original connection or adhesion between layers 6 and 4 in whole or in part.
  • the decontamination process described above works with a plurality of removable layers applied one above the other, depending on the type of pretreatment of the object 2 to be decontaminated, a two- or three-layer technique can be used.
  • the connection or liability mediation layer 4 is omitted.
  • the contamination carrier layer 6 also takes on this task.
  • the first two layers 4 and 6 and in the two-layer technology, layer 6 represent the operating state.
  • Layer 4 is preferably a chlorine-free primer, which should be acid-resistant, abrasion-resistant and radiation-resistant.
  • the contamination carrier layer 6 is preferably a highly stable product with a likewise high radiation resistance.
  • connection or adhesion-promoting layer 4 and the contamination carrier layer 6 are applied before the contamination (FIG. 1).
  • These two layers can be special varnishes.
  • the use of suitable foils is also possible.
  • the packaging layer 10 is then applied, for example sprayed on, spread on, glued on, etc. (FIG. 3).
  • Layers 6 and 10 form a firmly adhering connection and enclose the contaminants or contaminants 8. When these two layers bind, the adhesion between layers 4 and 6 is eliminated or reduced. It is also possible to remove or reduce the liability between the connection or liability mediation layer 4 and the object 2.
  • the layer package 10, 8, 6 can detach itself or be scratched and, for. B. with compressed air or mechanically the double layer 6, 10 with the fixed, embedded contamination 8 are easily removed (Fig. 4). By including the contamination, back contamination is reliably prevented.
  • the contamination carrier layer 6 is applied again to the surface of the object 2 or to the connection or adhesion-promoting layer 4, and the process can be repeated (as often as required) (FIG. 5).

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (9)

1. Procédé pour la décontamination d'objets dans lequel on applique sur les objets une couche de fixation de la contamination, caractérisé par le fait que sur la couche de fixation de la contamination (5), on applique, une fois que la contamination (8) de celle-ci a eu lieu, au moins une couche d'enveloppement (10) et qu'après l'application de la couche d'enveloppement (10), on enlève la couche composite multiple (6, 10), formée de la couche de fixation de la contamination (6) et de la couche d'enveloppement (10) et contenant les substances de contamination.
2. Procédé selon la revendication 1, caractérisé par le fait qu'entre la couche de fixation de la contamination (6) et la surface de l'objet (2), on applique une couche (4) servant d'intermédiaire de liaison ou d'adhérence entre la couche de fixation de la contamination (6) et la surface.
3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que l'application des différentes couches (4, 6, 10) s'effectue non seulement par la pulvérisation ou le badigeonnage en eux-mêmes connus, mais par immersion, collage ou soudage.
4. Procédé selon la revendication 2, caractérisé par le fait que la liaison ou l'adhérence peut être supprimée totalement ou partiellement.
5. Procédé selon l'une des revendications 1 à 4, caractérisé par le fait que l'on relie fermement d'un côté la couche d'enveloppement (10), par interaction physico-chimique, à la couche de fixation de la contamination (6) avec inclusion des substances de contamination et que, d'autre part, par la couche d'enveloppement, la liaison ou l'adhérence entre la couche de fixation de la contamination (6) et la surface de l'objet (2) ou entre la couche de fixation de la contamination (6) et la couche intermédiaire de liaison ou d'adhérence (4), est supprimée complètement ou partiellement par interaction physico-chimique.
6. Procédé selon l'une des revendications précédentes, caractérisé par le fait qu'on élimine de l'objet (2) la couche composite multiple (6, 10) contenant les substances de contamination (8), automatiquement, par soufflage, aspiration, brossage ou, ainsi qu'il est en soi connu, par décollement.
7. Procédé selon l'une des revendications précédentes, caractérisé par le fait que la couche intermédiaire de liaison ou d'adhérence est une couche primaire exempte de chlore.
8. Procédé selon la revendication 7, caractérisé par le fait que la couche primaire résiste aux acides, à l'abrasion et aux rayonnements.
9. Procédé selon l'une des revendications précédentes, caractérisé par le fait que la couche de fixation de la contamination (6) est formée d'une matière résistant aux acides, à l'abrasion et aux rayonnements.
EP19810102007 1981-03-18 1981-03-18 Procédé pour décontaminer des objets Expired EP0060314B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8181102007T DE3172473D1 (en) 1981-03-18 1981-03-18 Process for decontaminating objects
EP19810102007 EP0060314B1 (fr) 1981-03-18 1981-03-18 Procédé pour décontaminer des objets
JP4097282A JPS57161700A (en) 1981-03-18 1982-03-17 Method of removing poison of material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19810102007 EP0060314B1 (fr) 1981-03-18 1981-03-18 Procédé pour décontaminer des objets

Publications (2)

Publication Number Publication Date
EP0060314A1 EP0060314A1 (fr) 1982-09-22
EP0060314B1 true EP0060314B1 (fr) 1985-10-02

Family

ID=8187614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810102007 Expired EP0060314B1 (fr) 1981-03-18 1981-03-18 Procédé pour décontaminer des objets

Country Status (3)

Country Link
EP (1) EP0060314B1 (fr)
JP (1) JPS57161700A (fr)
DE (1) DE3172473D1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3446931C2 (de) * 1984-12-21 1987-01-08 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V., 3400 Göttingen Verfahren zum Dekontaminieren der Oberfläche eines Gegenstandes
FR2690163A1 (fr) * 1992-04-17 1993-10-22 Commissariat Energie Atomique Procédé de décontamination de la couche superficielle d'un sol recouvert de particules polluantes et solution de décontamination.
DE19521236C2 (de) * 1995-06-10 1999-08-05 Nukem Gmbh Verfahren zum Dekontaminieren der Begrenzungen von geschlossenen Bereichen
EP0820632A1 (fr) * 1996-02-12 1998-01-28 Siemens Aktiengesellschaft Fut contenant un corps presentant une contamination toxique et/ou radioactive, et procede de production dudit fut

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2877131A (en) * 1946-05-06 1959-03-10 Donald C Overholt Method and coating composition for protecting and decontaminating surfaces
GB848588A (en) * 1959-06-05 1960-09-21 Atomic Energy Authority Uk Method for separating particles of radioactive material from a solid surface
FR1303673A (fr) * 1960-08-16 1962-09-14 Atomic Energy Authority Uk Agents d'assainissement pour purifier des surfaces contaminées par des matières radio-actives
BE607242A (fr) * 1960-08-16
JPS4928880A (fr) * 1972-07-14 1974-03-14

Also Published As

Publication number Publication date
EP0060314A1 (fr) 1982-09-22
JPS57161700A (en) 1982-10-05
DE3172473D1 (en) 1985-11-07

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