EP1471135A1 - Composition de décontamination radioactive - Google Patents
Composition de décontamination radioactive Download PDFInfo
- Publication number
- EP1471135A1 EP1471135A1 EP04290826A EP04290826A EP1471135A1 EP 1471135 A1 EP1471135 A1 EP 1471135A1 EP 04290826 A EP04290826 A EP 04290826A EP 04290826 A EP04290826 A EP 04290826A EP 1471135 A1 EP1471135 A1 EP 1471135A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- surfactant
- composition
- composition according
- mass
- carbon atoms
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 114
- 238000005202 decontamination Methods 0.000 title claims description 31
- 230000003588 decontaminative effect Effects 0.000 title claims description 27
- 230000002285 radioactive effect Effects 0.000 title abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002245 particle Substances 0.000 claims abstract description 19
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 10
- 239000012736 aqueous medium Substances 0.000 claims abstract description 6
- 239000004094 surface-active agent Substances 0.000 claims description 42
- 239000006260 foam Substances 0.000 claims description 33
- 125000004432 carbon atom Chemical group C* 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 18
- 125000000217 alkyl group Chemical group 0.000 claims description 15
- 150000002191 fatty alcohols Chemical class 0.000 claims description 13
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 11
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000007791 liquid phase Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- JDSQBDGCMUXRBM-UHFFFAOYSA-N 2-[2-(2-butoxypropoxy)propoxy]propan-1-ol Chemical compound CCCCOC(C)COC(C)COC(C)CO JDSQBDGCMUXRBM-UHFFFAOYSA-N 0.000 claims description 2
- 239000004753 textile Substances 0.000 claims description 2
- 238000011109 contamination Methods 0.000 abstract description 5
- 239000000047 product Substances 0.000 description 12
- 125000004429 atom Chemical group 0.000 description 11
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 235000010755 mineral Nutrition 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 101100536354 Drosophila melanogaster tant gene Proteins 0.000 description 5
- 241000195940 Bryophyta Species 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 239000002609 medium Substances 0.000 description 3
- 235000011929 mousse Nutrition 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 229920001983 poloxamer Polymers 0.000 description 2
- 229940072033 potash Drugs 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 235000015320 potassium carbonate Nutrition 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- DUFKCOQISQKSAV-UHFFFAOYSA-N Polypropylene glycol (m w 1,200-3,000) Chemical compound CC(O)COC(C)CO DUFKCOQISQKSAV-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 235000021183 entrée Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002563 ionic surfactant Substances 0.000 description 1
- 239000008258 liquid foam Substances 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
- G21F9/28—Treating solids
- G21F9/30—Processing
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/825—Mixtures of compounds all of which are non-ionic
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/48—Medical, disinfecting agents, disinfecting, antibacterial, germicidal or antimicrobial compositions
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/662—Carbohydrates or derivatives
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/72—Ethers of polyoxyalkylene glycols
Definitions
- the invention relates to a composition intended to be brought into contact with a part presenting on its surface contaminated particles, to allow the decontamination of said part, as well as decontamination methods of a piece using such a composition.
- the composition is particularly intended for the treatment of radioactive contamination not fixed, i.e. when it is not necessary to erode the part to reach the contaminated particles and allow their transfer from the surface of the room to the decontamination composition.
- Decontamination of the room corresponds to the reduction in the number of radioactive particles present on the surface of the part, up to a threshold predetermined, which may vary according to the needs and wishes of the user of the room.
- Rooms to be decontaminated can be fluid lines, walls, floors, ceilings, tanks, swimming pools, or various objects.
- compositions for radioactive decontamination of a room We already know compositions for radioactive decontamination of a room. However, the known compositions do not give whole satisfaction.
- compositions do not make it possible to obtain the efficacy of decontamination required in terms of quantity of radioactive particles remaining on the surface of the room after decontamination operations.
- compositions cannot form foams adapted to needs, and are therefore exclusively brought into contact in the form liquid with the part to be decontaminated, by washing, soaking, or high pressure jet spraying.
- compositions which can be used in the form of foams have a number of drawbacks.
- these compositions do not generate stable foams for a sufficient time, which can be transported from an area of foam formation towards the part to be decontaminated without undergoing degradation. It is therefore necessary that the operator forms the foam nearby immediately of the room to be decontaminated.
- the known compositions are not capable of respecting the new constraints imposed in the field of radioactive decontamination (quality of the foam allowing a high level of decontamination to be obtained, reduction of the dose of radioactivity received by the operator during the operations of decontamination).
- the known compositions do not make it possible to obtain a foam which can be suitably projected onto the part to be decontaminated with force necessary.
- the invention aims to solve these problems.
- HLB hydrophilic-lipophilic balance
- the first surfactant has good foaming and detergent properties, while that the second surfactant has good detergent and wetting power.
- the composition according to the invention is particularly effective in terms of degree of decontamination obtained.
- it provides a foam of very good quality. Thanks to this composition, which is in liquid form, can therefore carry out effective decontamination in the liquid phase or foam phase from the same composition.
- the invention may provide for mixing the two surfactants, water, and possibly other products in proportions such as the composition has a cloud point below 90 ° C, even below 80 ° C, or even less than 70 ° C.
- the first surfactant and the second surfactant belong to separate chemical families.
- the first surfactant is a polyglucoside, the alkyl chain of which contains between 6 and 10 carbon atoms, and more particularly a polyglucoside whose alkyl chain contains between 6 and 9 carbon atoms.
- the second surfactant can be an ethoxylated fatty alcohol, comprising between 8 and 12 carbon atoms and between 5 and 9 ethylene oxide groups in medium, and more particularly an ethoxylated fatty alcohol comprising between 10 and 12 carbon atoms and between 5 and 9 ethylene oxide groups in average.
- the composition can contain between 1 and 15% by mass of a propylene glycol ether, for example of dipropylene glycol (DPM), as a solvent, and / or between 1 and 15% by mass of an alkaline base such as soda or potash.
- a propylene glycol ether for example of dipropylene glycol (DPM)
- DPM dipropylene glycol
- This composition has a cloud point close to 70 ° C., and between 65 and 70 ° C for a 5 to 10% dilution. No aggressiveness of this composition is not detected on the following materials: stainless steels, brass, Inconol.
- the composition comprises, in addition to the first and second surfactants, between 1 and 15% of a third nonionic surfactant including HLB, measured at room temperature in a medium aqueous, is between 13 and 15.
- the third surfactant is for example a polyglucoside, the alkyl chain of which has between 8 and 12 carbon atoms, said third surfactant being different from the first surfactant.
- This composition has a cloud point greater than 95 ° C., and included between 72 and 80 ° C for a dilution of 5 to 10%. No aggressiveness of this composition is not detected on the following materials: stainless steels, brass, Inconol.
- the composition according to the invention does not contain of ionic surfactant, all the surfactants contained in this composition being non-ionic.
- the invention relates to a decontamination process of a part with contaminated particles on its surface, using the composition as previously described.
- the composition is applied to the part by spraying in liquid phase.
- the part is immersed in the composition.
- said part is rubbed with a support in textile (e.g. cotton cloth) or cellulosic material soaked in composition.
- a support e.g. cotton cloth
- cellulosic material soaked in composition.
- We can then add to said support, in addition to the composition: nitric acid, soda, solvent and / or soapy water.
- the decontamination process comprises the steps of generating a foam from the composition, applying the foam on the part, rinse said part.
- the composition is a formulation aqueous biodegradable surfactants, in alkaline medium, designed specially for treating unbound contamination in the presence of fatty substances.
- the composition also includes dipropylene glycol.
- Dipropylene glycol is miscible in water and makes it possible to dissolve fatty substances (fat, oil present on the surface of the part to be decontaminated), inside the micelles formed by surfactants.
- the composition further comprises an alkaline base such as sodium hydroxide caustic or potash.
- the alkaline base allows, in addition to a good degreasing from the surface, to decrease the temperature of the cloud point (beyond which the composition is much less foaming), from 90 ° C to 70 ° C approximately. This facilitates the reprocessing of effluents in an evaporator, in which seeks to avoid foaming for more efficiency.
- composition comprises water, for example demineralized water.
- composition is given in the table below.
- Component % by mass component trade name provider Polyglucoside (8 carbon atoms) 7 SIMULSOL SL8 SEPPIC ethoxylated fatty alcohol (10 carbon atoms, 7 ethylene oxide groups) 7 SYNPERONIC 10/7 HERE dipropylene glycol 6 DOWANOL DPM DOW CHEMICAL pearl soda 4 SOLVAY water 76
- the various containers containing the components are rinsed with the remainder of demineralized water, the liquid obtained then being poured into the tank. After stirring for approximately 5 minutes, the composition is obtained.
- fresh product is meant the composition produced according to the process described above, for example packaged in cans, and ready to use (diluted, heated, pressurized to form a foam, etc.) to decontamination of a room.
- the composition is a formulation aqueous biodegradable surfactants, at neutral pH, designed specially to treat non-fixed contamination in the absence of fatty substances. Its neutral pH allows the composition to be used on all materials.
- the presence of the polyglucoside, the alkyl chain of which contains 10 atoms of carbon allows better adsorption of the composition on the surface of contaminated particles.
- the composition also comprises water, for example demineralized water.
- component % by mass component trade name provider polyglucoside (8 carbon atoms) 18 SIMULSOL SL8 SEPPIC ethoxylated fatty alcohol (10 carbon atoms, 7 ethylene oxide groups) 7.2 SYNPERONIC 10/7 HERE polyglucoside (10 carbon atoms) 3 SIMULSOL SL10 SEPPIC water 71.8
- composition is given in the table above.
- the polyglucoside with 10 carbon atoms is prepared. If the product is pasty, pour three-quarters of the demineralized water at around 30 ° C. If the product is liquid, pour three quarters of the demineralized water to ambient temperature.
- the polyglucoside with 10 carbon atoms thus prepared is poured into a tank, then stir for about 10 minutes, or even 20 minutes, until the dissolution is complete.
- the solution obtained is then translucent to light yellow.
- the various containers containing the components are rinsed with the remainder of demineralized water, the liquid obtained then being poured into the tank. After stirring for approximately 5 minutes, the composition is obtained.
- composition produced according to the first or second embodiment previously described, is biodegradable and complies with the relative requirements products used in nuclear power plants.
- composition is optimized so that the material concentration organic and mineral is as low as possible, and less than 5%, in the effluents, in order to reduce the cost and facilitate the treatment of these effluents.
- composition according to the invention specially designed to treat the radioactive decontamination not fixed, is intended to be brought into contact with a part with contaminated particles on its surface, to allow decontamination of said part by ensuring the passage of particles contaminated from the surface of the room to the composition.
- the composition can be applied to the part by phase spraying liquid.
- One can also immerse the part in the liquid composition.
- a third mode of decontamination consists in generating a wet foam from the composition then spray this foam on the piece to be decontaminate.
- a foam is formed from the liquid and water composition (dilution between 0.1 and 50%, even between 5 and 30%, in particular close to 20%, in depending on the material of the part to be decontaminated and the degree of contamination).
- two containers one containing water and the other containing the composition liquid according to the invention are provided.
- the water and the composition are brought into the desired proportions (by a system of pipes and pumps dosers) to a foam generating device, and introduced into a nozzle communicating coaxially with the convergent of a Venturi stage.
- the Venturi stage having a gas inlet opening into the convergent, gas, for example air, is sucked in by the Venturi effect.
- the gas - water mixture - composition is then moved to the divergent part of the Venturi stage and then to a mixing chamber.
- the geometry of the device - and in particular of the divergent - is provided for create a cavitation phenomenon at the exit of the Venturi stage. It follows foaming in the divergent and the mixing chamber.
- the foam is then transported, via hoses, from the device generation of this foam up to the part to be decontaminated, then sprayed onto said part using specific tools.
- the quality and stability of the foam obtained from the composition according to the invention make it possible to generate the foam at a distance from the part, from the transport over several tens of meters and project it efficiently against the part without the foam being degraded, in terms of composition, size of bubbles, etc. An operator can therefore work remotely of the contaminated part, which considerably reduces the dose of radioactivity that it receives during this decontamination.
- One or more applications of foam may be necessary in depending on the degree of decontamination of the part predetermined by the user.
- a water rinse is carried out, which allows removing the contaminated particles with the decontamination composition.
- the effluents generated by this composition can be treated on the conventional nuclear installations after simple neutralization with a product.
- the concentration of organic matter and mineral content in effluents is less than 5%. According to decontamination effluents can contain 96 to 98% water.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Detergent Compositions (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
- entre 1 et 25 % en masse d'un premier tensioactif non ionique dont le HLB (balance hydrophile - lipophile), mesuré à température ambiante en milieu aqueux, est compris entre 14 et 16 ;
- entre 1 et 20 % en masse d'un deuxième tensioactif non ionique dont le HLB, mesuré à température ambiante en milieu aqueux, est compris entre 12 et 14 ;
- de l'eau.
- entre 5 et 10 % en masse d'un polyglucoside dont la chaíne alkyle comporte 8 atomes de carbone, en tant que premier tensioactif ;
- entre 5 et 10 % en masse d'un alcool gras éthoxylé comportant 10 atomes de carbone et 7 groupements oxydes d'éthylène en moyenne, en tant que deuxième tensioactif ;
- entre 3 et 9 % en masse de dipropylène glycol ;
- entre 0,1 et 6 % en masse de soude en perles ;
- le complément en eau.
- entre 15 et 20 % en masse d'un polyglucoside dont la chaíne alkyle comporte 8 atomes de carbone, en tant que premier tensioactif ;
- entre 5 et 10 % en masse d'un alcool gras éthoxylé comportant 10 atomes de carbone et 7 groupements oxydes d'éthylène en moyenne, en tant que deuxième tensioactif ;
- entre 1 et 5 % en masse d'un polyglucoside dont la chaíne alkyle comporte 10 atomes de carbone, en tant que troisième tensioactif ;
- le complément en eau.
- prévoir un dispositif comprenant d'une part une buse d'introduction de liquide et d'autre part un étage Venturi comportant un convergent coaxial à ladite buse, une entrée de gaz débouchant dans le convergent, et un divergent communiquant avec une chambre de mélange, la géométrie du dispositif étant définie pour créer un phénomène de cavitation en sortie de l'étage Venturi ;
- introduire la composition sous forme liquide par la buse vers l'étage Venturi, entraínant l'aspiration du gaz par effet Venturi et la formation de mousse dans le divergent et la chambre de mélange.
- un polyglucoside dont la chaíne alkyle comporte 8 atomes de carbone ; Ce tensioactif présente un HLB voisin de 15,8 et permet ainsi d'obtenir, à partir de la composition, une mousse possédant une stabilité et une persistance plus importantes qu'avec les compositions de décontamination connues. La mousse peut ainsi être générée à distance de la pièce à décontaminer et être transportée vers cette pièce, sans subir de dégradation de ses qualités, notamment dans le temps.
- un alcool gras éthoxylé, comportant 10 atomes de carbone et 7 groupements oxydes d'éthylène en moyenne. Ce tensioactif présente un HLB voisin de 13,5, ce qui le rend très adsorbant sur la surface des particules contaminées, permettant ainsi de déplacer facilement les particules radioactives depuis la surface de la pièce à décontaminer vers la composition. Ce tensioactif contribue à l'efficacité de l'opération de décontamination de la pièce.
| Composant | % massique | dénomination commerciale du composant | fournisseur |
| Polyglucoside (8 atomes de carbone) | 7 | SIMULSOL SL8 | SEPPIC |
| alcool gras éthoxylé (10 atomes de carbone, 7 groupements oxydes d'éthylène) | 7 | SYNPERONIC 10/7 | ICI |
| dipropylène glycol | 6 | DOWANOL DPM | DOW CHEMICAL |
| soude en perles | 4 | SOLVAY | |
| eau | 76 |
- matières organiques dans le produit frais : 17 % en masse
- matières minérales dans le produit frais : 4 % en masse
- eau dans le produit frais : 79% en masse.
- état physique à 20°C liquide
- couleur marron clair
- odeur légère
- solubilité dans l'eau à 20°C très soluble
- pH (10% dans l'eau à 20°C) entre 12 et 13
- pression de vapeur à 20°C similaire à celle de l'eau
- masse volumique à 20°C entre 1,045 et 1,065 g/cm3
- tension superficielle (1 % dans l'eau) entre 27 et 32 mN/m
- un polyglucoside, dérivé du sucre, dont la chaíne alkyle comporte 8 atomes de carbone ;
- un alcool gras éthoxylé, comportant 10 atomes de carbone et 7 groupements oxydes d'éthylène en moyenne ;
- un polyglucoside, dérivé du sucre, dont la chaíne alkyle comporte 10 atomes de carbone.
| composant | % massique | dénomination commerciale du composant | fournisseur |
| polyglucoside (8 atomes de carbone) | 18 | SIMULSOL SL8 | SEPPIC |
| alcool gras éthoxylé (10 atomes de carbone, 7 groupements oxydes d'éthylène) | 7,2 | SYNPERONIC 10/7 | ICI |
| polyglucoside (10 atomes de carbone) | 3 | SIMULSOL SL10 | SEPPIC |
| eau | 71,8 |
- matières organiques dans le produit frais : 19 % en masse
- matières minérales dans le produit frais : 0 % en masse
- eau dans le produit frais : 81 % en masse.
- état physique à 20°C liquide
- couleur translucide
- odeur légère
- solubilité dans l'eau à 20°C très soluble
- pH (10% dans l'eau à 20°C) entre 6 et 7
- pression de vapeur à 20°C similaire à celle de l'eau
- masse volumique à 20°C entre 1,025 et 1,035 g/cm3
Claims (16)
- Composition destinée à être mise en contact avec une pièce présentant sur sa surface des particules contaminées, pour permettre la décontamination de ladite pièce, ladite composition comprenant au moins :entre 1 et 25 % en masse d'un premier tensioactif non ionique dont le HLB (balance hydrophile - lipophile), mesuré à température ambiante en milieu aqueux, est compris entre 14 et 16 ;entre 1 et 20 % en masse d'un deuxième tensioactif non ionique dont le HLB, mesuré à température ambiante en milieu aqueux, est compris entre 12 et 14 ;de l'eau.
- Composition selon la revendication 1, caractérisée en ce que le premier tensioactif et le deuxième tensioactif appartiennent à des familles chimiques distinctes.
- Composition selon la revendication 1 ou 2, caractérisée en ce que le premier tensioactif est un polyglucoside dont la chaíne alkyle comporte entre 6 et 10 atomes de carbone.
- Composition selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le deuxième tensioactif est un alcool gras éthoxylé, comportant entre 8 et 12 atomes de carbone et entre 5 et 9 groupements oxydes d'éthylène en moyenne.
- Composition selon l'une quelconque des revendications 1 à 4, caractérisée en ce qu'elle comporte entre 1 et 15 % en masse d'un éther de propylène glycol, par exemple de dipropylène glycol (DPM).
- Composition selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'elle comporte entre 1 et 15 % en masse d'une base alcaline telle que la soude ou la potasse.
- Composition selon la revendication 1, caractérisée en ce qu'elle comporte :entre 5 et 10 % en masse d'un polyglucoside dont la chaíne alkyle comporte 8 atomes de carbone, en tant que premier tensioactif ;entre 5 et 10 % en masse d'un alcool gras éthoxylé comportant 10 atomes de carbone et 7 groupements oxydes d'éthylène en moyenne, en tant que deuxième tensioactif ;entre 3 et 9 % en masse de dipropylène glycol ;entre 0,1 et 6 % en masse de soude en perles ;le complément en eau.
- Composition selon l'une quelconque des revendications 1 à 4, caractérisée en ce qu'elle comporte entre 1 et 15 % d'un troisième tensioactif non ionique dont le HLB, mesuré à température ambiante en milieu aqueux, est compris entre 13 et 15.
- Composition selon la revendication 8, caractérisée en ce que le troisième tensioactif est un polyglucoside dont la chaíne alkyle comporte entre 8 et 12 atomes de carbone, ledit troisième tensioactif étant différent du premier tensioactif.
- Composition selon la revendication 8, caractérisée en ce qu'elle comporte :entre 15 et 20 % en masse d'un polyglucoside dont la chaíne alkyle comporte 8 atomes de carbone, en tant que premier tensioactif ;entre 5 et 10 % en masse d'un alcool gras éthoxylé comportant 10 atomes de carbone et 7 groupements oxydes d'éthylène en moyenne, en tant que deuxième tensioactif ;entre 1 et 5 % en masse d'un polyglucoside dont la chaíne alkyle comporte 10 atomes de carbone, en tant que troisième tensioactif ;le complément en eau.
- Composition selon l'une quelconque des revendications 1 à 10, caractérisée en ce que tous les tensioactifs contenus dans ladite composition sont non ioniques.
- Procédé de décontamination d'une pièce présentant sur sa surface des particules contaminées, caractérisé en ce qu'on applique une composition selon l'une quelconque des revendications 1 à 11 sur ladite pièce, par pulvérisation en phase liquide.
- Procédé de décontamination d'une pièce présentant sur sa surface des particules contaminées, caractérisé en ce qu'on plonge ladite pièce dans une composition selon l'une quelconque des revendications 1 à 11.
- Procédé de décontamination d'une pièce présentant sur sa surface des particules contaminées, caractérisé en ce qu'on frotte ladite pièce avec un support en matériau textile ou cellulosique imbibé d'une composition selon l'une quelconque des revendications 1 à 11.
- Procédé de décontamination d'une pièce présentant sur sa surface des particules contaminées, caractérisé en ce qu'il comprend les étapes consistant à :générer une mousse à partir d'une composition selon l'une quelconque des revendications 1 à 11 ;appliquer la mousse sur la pièce ;rincer ladite pièce.
- Procédé de décontamination selon la revendication 15, caractérisé en ce que l'étape de génération de la mousse comprend elle-même les étapes consistant à :prévoir un dispositif comprenant d'une part une buse d'introduction de liquide et d'autre part un étage Venturi comportant un convergent coaxial à ladite buse, une entrée de gaz débouchant dans le convergent, et un divergent communiquant avec une chambre de mélange, la géométrie du dispositif étant définie pour créer un phénomène de cavitation en sortie de l'étage Venturi ;introduire la composition sous forme liquide par la buse vers l'étage Venturi, entraínant l'aspiration du gaz par effet Venturi et la formation de mousse dans le divergent et la chambre de mélange.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0303885 | 2003-03-28 | ||
| FR0303885A FR2853130B1 (fr) | 2003-03-28 | 2003-03-28 | Composition de decontamination radioactive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1471135A1 true EP1471135A1 (fr) | 2004-10-27 |
| EP1471135B1 EP1471135B1 (fr) | 2010-12-22 |
Family
ID=32947267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04290826A Expired - Lifetime EP1471135B1 (fr) | 2003-03-28 | 2004-03-29 | Composition de décontamination radioactive |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1471135B1 (fr) |
| AT (1) | ATE492619T1 (fr) |
| DE (1) | DE602004030634D1 (fr) |
| ES (1) | ES2358263T3 (fr) |
| FR (1) | FR2853130B1 (fr) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2539928A1 (de) * | 1975-09-09 | 1977-03-10 | Eduard Bossert | Verfahren und mittel zum reinigen von oberflaechen von lebens- u. futtermitteln |
| US4129514A (en) * | 1976-03-24 | 1978-12-12 | Rhone-Poulenc Industries | Surface-active composition based on non-ionic surfactants |
| EP0342043A2 (fr) * | 1988-05-13 | 1989-11-15 | The Procter & Gamble Company | Compositions détergentes granulaires |
| FR2763595A1 (fr) * | 1997-05-26 | 1998-11-27 | Inst Francais Du Petrole | Composition aqueuse contenant des composes tensio-actifs et un alcool, et procede de decontamination in situ d'un milieu poreux pollue par des hydrocarbures |
| US6046152A (en) * | 1996-04-16 | 2000-04-04 | The Procter & Gamble Company | Liquid cleaning compositions containing selected mid-chain branched surfactants |
-
2003
- 2003-03-28 FR FR0303885A patent/FR2853130B1/fr not_active Expired - Lifetime
-
2004
- 2004-03-29 ES ES04290826T patent/ES2358263T3/es not_active Expired - Lifetime
- 2004-03-29 EP EP04290826A patent/EP1471135B1/fr not_active Expired - Lifetime
- 2004-03-29 AT AT04290826T patent/ATE492619T1/de not_active IP Right Cessation
- 2004-03-29 DE DE602004030634T patent/DE602004030634D1/de not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2539928A1 (de) * | 1975-09-09 | 1977-03-10 | Eduard Bossert | Verfahren und mittel zum reinigen von oberflaechen von lebens- u. futtermitteln |
| US4129514A (en) * | 1976-03-24 | 1978-12-12 | Rhone-Poulenc Industries | Surface-active composition based on non-ionic surfactants |
| EP0342043A2 (fr) * | 1988-05-13 | 1989-11-15 | The Procter & Gamble Company | Compositions détergentes granulaires |
| US6046152A (en) * | 1996-04-16 | 2000-04-04 | The Procter & Gamble Company | Liquid cleaning compositions containing selected mid-chain branched surfactants |
| US6087309A (en) * | 1996-04-16 | 2000-07-11 | The Procter & Gamble Company | Liquid cleaning compositions containing selected mid-chain branched surfactants |
| FR2763595A1 (fr) * | 1997-05-26 | 1998-11-27 | Inst Francais Du Petrole | Composition aqueuse contenant des composes tensio-actifs et un alcool, et procede de decontamination in situ d'un milieu poreux pollue par des hydrocarbures |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2853130B1 (fr) | 2006-02-17 |
| FR2853130A1 (fr) | 2004-10-01 |
| DE602004030634D1 (de) | 2011-02-03 |
| ES2358263T3 (es) | 2011-05-09 |
| EP1471135B1 (fr) | 2010-12-22 |
| ATE492619T1 (de) | 2011-01-15 |
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