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EP0055671B2 - Verfahren zum Fixieren von radioaktiver Kontamination auf Materialien oder kontaminierten Abfallstoffen und Anwendung desselben - Google Patents

Verfahren zum Fixieren von radioaktiver Kontamination auf Materialien oder kontaminierten Abfallstoffen und Anwendung desselben Download PDF

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Publication number
EP0055671B2
EP0055671B2 EP19810402073 EP81402073A EP0055671B2 EP 0055671 B2 EP0055671 B2 EP 0055671B2 EP 19810402073 EP19810402073 EP 19810402073 EP 81402073 A EP81402073 A EP 81402073A EP 0055671 B2 EP0055671 B2 EP 0055671B2
Authority
EP
European Patent Office
Prior art keywords
resin
process according
resins
contaminated
application
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
EP19810402073
Other languages
English (en)
French (fr)
Other versions
EP0055671A1 (de
EP0055671B1 (de
Inventor
Guy Aubouin
Georges Aude
Christian De Tassigny
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9249751&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0055671(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP0055671A1 publication Critical patent/EP0055671A1/de
Application granted granted Critical
Publication of EP0055671B1 publication Critical patent/EP0055671B1/de
Publication of EP0055671B2 publication Critical patent/EP0055671B2/de
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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
    • 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
    • G21F9/28—Treating solids
    • G21F9/30—Processing
    • G21F9/301—Processing by fixation in stable solid media
    • G21F9/307—Processing by fixation in stable solid media in polymeric matrix, e.g. resins, tars

Definitions

  • the subject of the present invention is a method for fixing radioactive contamination on polluted materials or waste as well as its application.
  • the present invention provides a solution to this problem of transferring and handling contaminated objects.
  • the process which is the subject of the invention is easy to carry out, has a low cost price and provides very high safety.
  • the subject of the invention is a method for fixing labile radioactive contamination on the surfaces of a contaminated object, characterized in that one projects onto the contaminated object using an electrostatic gun, at minus a layer of polymerizable resin at room temperature, adhering to the surface of the contaminated object.
  • epoxy resins epoxy resins, polyester resins, vinyl resins, mixtures of thermosetting and thermoplastic resins can be considered.
  • Thinners to adjust the viscosity, can be added to the resins. Depending on the operating conditions, open air or closed premises, these diluents will be chosen to be flammable or not.
  • diluents By way of example of diluents, mention may be made of the mixture of 1.1.2 trichloro, 1.2.2 trifluoroethane and 1.1.1 trichloroethane, the ketone derivatives and the diluents E and SC 1 sold by the company BLANCOMME. These diluents are chosen according to their properties, in particular their flash point, their viscosity and their resistivity to obtain a mixture capable of being sprayed by an electrostatic gun.
  • Adjuvants can also be incorporated into the resins.
  • powdered metals can be used, for example, aluminum powder, zinc powder, etc., metal oxides such as oxides of zinc, iron, aluminum, titanium etc., salts such as calcium carbonate, fibers for example glass fibers, carbon, boron etc. and mineral beads for example glass or silica beads.
  • Any electrostatic paint having the aforementioned characteristics can be used in the process of the invention, for example epoxy - phenolic and epoxy - aminoplast resins, esters of epoxy resins and fatty acids and epoxy resins modified by polyamines or by diisocyanates.
  • the paints can be sprayed in liquid form in a solvent or in powder form.
  • the fixing of the contamination takes place only to ensure a transfer of the materials in complete safety.
  • a thin layer of resin is deposited in one or more passes on the material.
  • This deposit can take place in an armored cell or in the open air, depending on the activity.
  • the material is transported and packaged by any known means, such as that described in French patent FR-A 2361725: "Process for the storage of large solid radioactive waste".
  • the fixation of the contamination serves at the same time as final packaging.
  • a suitable number of passes should be provided to ensure a sufficiently thick resin coating.
  • the resin is applied pure or mixed with an inert filler.
  • fixation properties of the contamination were determined by comparison of smears carried out on control surfaces soiled by labile contamination, before and after projection.
  • the layer (s) adhere perfectly after polymerization to the surface of the waste, do not break or flake off if the waste undergoes mechanical deformation after coating, and are resistant to falling.
  • the installation comprises a closed enclosure 1 constituted by a fume cupboard inside which one can introduce an electrostatic projection gun 3, for example a gun of the Statary type sold by the SAMES Company, under the reference MRV96.
  • an electrostatic projection gun 3 for example a gun of the Statary type sold by the SAMES Company, under the reference MRV96.
  • the nozzle of the electrostatic gun 3 is supplied with electric current by a generator 5 which supplies by the conductor 7 a high voltage (90k-volt) with a current of approximately 0.1 milliampere, and which is connected to the sector by the conductor 9 .
  • the gun 3 is also supplied with compressed air by line 11 provided with an adjustable pressure gauge 13, and with resin by line 15 connected to a resin tank 17 itself supplied with compressed air by line 19.
  • pressure gauges 21 make it possible to control the pressure in the various circuits of the installation.
  • a container 27 is placed below the part 23 to collect the drops of excess resin liable to to flow from the part 23 during the projection operation.
  • the fume cupboard is connected to a duct 29 provided with a grid 31 in order to ensure ventilation inside the fume cupboard 1 and renew the air.
  • the nozzle of the gun 3 is chosen according to the shape of the pieces of contaminated material to be treated and it can project either a rounded jet 4 which is suitable for the treatment of pieces of complex shape, or a flat jet for the pieces of large surface .
  • the part 23 of contaminated material to be treated is placed in the fume cupboard and the electrostatic gun 3 is supplied, on the one hand, with electric current and, on the other hand, with resin. maintaining in the tank 17 an air pressure of 0.5 to 6 bars.
  • the resin is sprayed onto the external surface of the part 23 and the excess resin drops are collected in the container 27.
  • This example is intended to determine the yield of the fixing of the resin.
  • This example is intended to show the efficiency of the process.
  • Three plates of oxidized steel are prepared on which identical solutions are deposited, each containing 240 p.Ci of 1 3 7 C S.
  • the first plate After drying, the first plate is left intact as a control.
  • This example shows the effectiveness of the process when depositing the paint in a thick layer.
  • Three plates of degreased steel are prepared and the first plate is covered with a layer of powder paint electrostatically sprayed which consists of the epoxy paint sold by the company BLANCOMME under the reference 95 KT 17 White-red-brown powder.
  • the spraying is continued for 20 seconds and the curing is carried out hot at a temperature of 180 ° C.
  • a layer is thus obtained whose thickness is 700 microns.
  • degreasing the plates is to facilitate the attachment of the thick layer of paint.
  • this degreasing operation could be replaced by the deposition on the plates of a layer of primer paint, which also makes it possible to ensure the attachment of the paint subsequently deposited in a thick layer.

Landscapes

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

Claims (7)

1. Verfahren zum Fixieren labiler radioaktiver Kontamination auf den Oberflächen eines kontaminierten Objekts, dadurch gekennzeichnet, dass man mit Hilfe einer elektrostatischen Sprühpistole auf das kontaminierte Objekt wenigstens eine Schicht aus einem Kunstharz sprüht, die bei Umgebungstemperatur polymerisierbar ist und die auf der Oberfläche des kontaminierten Objekts haftet.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die bei Umgebungstemperatur polymerisierbaren Harze aus der Gruppe der Expoxydharze, Polyesterharze, Vinylharze und Harzmischungen von thermohärtbaren und thermoplastischen Harzen ausgewählt sind.
3. Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, dass wenigstens ein Verdünnungsmittel dem polymerisierbaren Harz zugesetzt wird.
4. Verfahren nach den Ansprüchen 1, 2 und 3, dadurch gekennzeichnet, dass dem Harz wenigstens ein Adjuvans hinzugefügt wird.
5. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass das Adjuvans Eisenoxid oder Zinkoxid ist.
6. Anwendung des Verfahrens nach einem der Ansprüche 1 bis 5 bei der Fixierung der Kontamination für die Transportsicherung kontaminierter Materialien.
7. Anwendung des Verfahrens nach einem der Ansprüche 1 bis 5 bei der Fixierung der Kontamination zur Sicherung der Verpackung und der Lagerung.
EP19810402073 1980-12-31 1981-12-23 Verfahren zum Fixieren von radioaktiver Kontamination auf Materialien oder kontaminierten Abfallstoffen und Anwendung desselben Expired EP0055671B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8027977A FR2501405B1 (fr) 1980-12-31 1980-12-31 Procede de fixation de la contamination radioactive sur des materiaux ou des dechets contamines et son application
FR8027977 1980-12-31

Publications (3)

Publication Number Publication Date
EP0055671A1 EP0055671A1 (de) 1982-07-07
EP0055671B1 EP0055671B1 (de) 1985-04-10
EP0055671B2 true EP0055671B2 (de) 1988-12-07

Family

ID=9249751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810402073 Expired EP0055671B2 (de) 1980-12-31 1981-12-23 Verfahren zum Fixieren von radioaktiver Kontamination auf Materialien oder kontaminierten Abfallstoffen und Anwendung desselben

Country Status (4)

Country Link
EP (1) EP0055671B2 (de)
JP (1) JPS57135400A (de)
DE (1) DE3169924D1 (de)
FR (1) FR2501405B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0820632A1 (de) * 1996-02-12 1998-01-28 Siemens Aktiengesellschaft Gebinde mit einem körper mit toxischer und/oder radioaktiver kontamination und verfahren zum herstellen eines solchen gebindes
FR2763264B1 (fr) * 1997-05-14 1999-07-23 Rene Massard Procede de projection electrostatique d'une resine sur un support fibreux ou contamine
RU2174724C1 (ru) * 2000-05-18 2001-10-10 Московское государственное предприятие-объединенный эколого-технологический и научно-исследовательский центр по обезвреживанию РАО и охране окружающей среды (МосНПО "Радон") Способ дезактивации твердых негорючих поверхностей
LU91605B1 (fr) * 2009-09-07 2011-03-08 Terra Nobilis S A Procédé de sécurisation du stockage de déchets radioactifs de longue vie.
NL2025759B1 (en) * 2020-06-04 2022-01-28 Rexnord Flattop Europe Bv Method and conveyor for in-line cleaning of containers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4811568B1 (de) * 1968-10-03 1973-04-14
DE1801578A1 (de) * 1968-10-05 1971-06-03 Tehab Kg M N Duivelaar & Co Abschirmung gegen Kernspaltungsstrahlungen
FR2361725A1 (fr) * 1976-08-13 1978-03-10 Commissariat Energie Atomique Procede de stockage de dechets radioactifs solides de grandes dimensions
JPS5441000A (en) * 1977-09-08 1979-03-31 Babcock Hitachi Kk Radioactive material fixation device

Also Published As

Publication number Publication date
FR2501405A1 (fr) 1982-09-10
JPS57135400A (en) 1982-08-20
DE3169924D1 (en) 1985-05-15
EP0055671A1 (de) 1982-07-07
FR2501405B1 (fr) 1986-01-17
EP0055671B1 (de) 1985-04-10

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