FR2380624A1 - Radioactive decontamination by applying gel contg. decontaminant - then rinsing off or removing when dry - Google Patents

Radioactive decontamination by applying gel contg. decontaminant - then rinsing off or removing when dry

Info

Publication number
FR2380624A1
FR2380624A1 FR7703618A FR7703618A FR2380624A1 FR 2380624 A1 FR2380624 A1 FR 2380624A1 FR 7703618 A FR7703618 A FR 7703618A FR 7703618 A FR7703618 A FR 7703618A FR 2380624 A1 FR2380624 A1 FR 2380624A1
Authority
FR
Grant status
Application
Patent type
Prior art keywords
gel
decontaminant
obtd
dry
removing
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
Application number
FR7703618A
Other languages
French (fr)
Other versions
FR2380624B1 (en )
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 l'Energie Atomique et aux Energies Alternatives
Original Assignee
Commissariat a l'Energie Atomique et aux Energies Alternatives
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

Links

Classifications

    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21FPROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/001Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
    • G21F9/002Decontamination of the surface of objects with chemical or electrochemical processes

Abstract

Radioactive decontamination of part is effected by applying a decontaminating gel to its surface, them removing it. The gel pref. has a viscosity of >=350 cP. It can be a glycerophthalic gel contg. a soln. of decontaminant, obtd. by reacting a 1:4 or 1:1 molar mixt. of phthalic anhydride and glycerol. Alternatively, it can be a glycerophosphoric gel, obtd. by reaction of an equimolar mixt. of glycerol and phosphoric acid; a cellulosic gel, e.g. obtd. by reaction of cellulose acetate, ethylene glycol, and acetic acid; a PVA gel; a silica gel, e.g. a silico-ethyl acetate gel; or an alumina gel. It can be applied by spray gun, and rinsed off with water, or allowed to dry and removed mechanically. The method overcomes the disadvantages of mechanical methods (which involve surface modification, and are difficult to apply to parts of complicated shape) and chemical methods (which lead to the production of large vols. of effluent and are difficult to apply to large parts). Low quantities of decontaminant are required, and the viscosity of the gel allows contact for the needed time for decontamination.
FR7703618A 1977-02-09 1977-02-09 Expired FR2380624B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7703618A FR2380624B1 (en) 1977-02-09 1977-02-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7703618A FR2380624B1 (en) 1977-02-09 1977-02-09

Publications (2)

Publication Number Publication Date
FR2380624A1 true true FR2380624A1 (en) 1978-09-08
FR2380624B1 FR2380624B1 (en) 1980-03-07

Family

ID=9186513

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7703618A Expired FR2380624B1 (en) 1977-02-09 1977-02-09

Country Status (1)

Country Link
FR (1) FR2380624B1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047857A2 (en) * 1980-09-13 1982-03-24 Nukem GmbH Process for decontaminating radioactively polluted surfaces
FR2518904A1 (en) * 1981-12-24 1983-07-01 Commissariat Energie Atomique A process for depositing a distance a product on a surface and its application to the fixation of toxic dust on the walls of a cavity contaminated
FR2522869A1 (en) * 1982-03-02 1983-09-09 Peintures Vernis Ste Lorraine Process for the radioactive decontamination of surfaces
FR2656949A1 (en) * 1990-01-09 1991-07-12 Commissariat Energie Atomique Decontaminating gel and its use for the radioactive decontamination of surfaces
EP0674323A1 (en) * 1994-03-22 1995-09-27 Commissariat A L'energie Atomique Gel for radioactive decontaminating and protecting of surfaces
WO1997035323A1 (en) * 1996-03-21 1997-09-25 Stmi - Societe Des Techniques En Milieu Ionisant Organomineral decontamination gel and use thereof for surface decontamination
FR2798603A1 (en) * 1999-09-20 2001-03-23 Tech En Milieu Ionisant Stmi S organic decontamination gel and its use for the decontamination of surfaces
FR2827530A1 (en) * 2001-07-17 2003-01-24 Commissariat Energie Atomique Surface treatment gel, especially for decontaminating ventilation shafts in nuclear plants, comprises a colloidal solution containing an inorganic viscosifier and a treatment agent

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047857A3 (en) * 1980-09-13 1982-06-23 Nukem GmbH Process for decontaminating radioactively polluted surfaces
EP0047857A2 (en) * 1980-09-13 1982-03-24 Nukem GmbH Process for decontaminating radioactively polluted surfaces
EP0083525A1 (en) * 1981-12-24 1983-07-13 COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel Method of decontaminating a closed cavity containing toxic dust
FR2518904A1 (en) * 1981-12-24 1983-07-01 Commissariat Energie Atomique A process for depositing a distance a product on a surface and its application to the fixation of toxic dust on the walls of a cavity contaminated
FR2522869A1 (en) * 1982-03-02 1983-09-09 Peintures Vernis Ste Lorraine Process for the radioactive decontamination of surfaces
FR2656949A1 (en) * 1990-01-09 1991-07-12 Commissariat Energie Atomique Decontaminating gel and its use for the radioactive decontamination of surfaces
EP0674323A1 (en) * 1994-03-22 1995-09-27 Commissariat A L'energie Atomique Gel for radioactive decontaminating and protecting of surfaces
FR2717709A1 (en) * 1994-03-22 1995-09-29 Commissariat Energie Atomique Gel capable of retaining radioactive contamination and its use to protect or decontaminating a surface.
FR2746328A1 (en) * 1996-03-21 1997-09-26 Stmi Soc Tech Milieu Ionisant ORGANOMINERAL decontamination gel and its use for the decontamination of surfaces
WO1997035323A1 (en) * 1996-03-21 1997-09-25 Stmi - Societe Des Techniques En Milieu Ionisant Organomineral decontamination gel and use thereof for surface decontamination
FR2798603A1 (en) * 1999-09-20 2001-03-23 Tech En Milieu Ionisant Stmi S organic decontamination gel and its use for the decontamination of surfaces
WO2001022431A1 (en) * 1999-09-20 2001-03-29 S.T.M.I. Société des Techniques en Milieu Ionisant Decontaminating organic gel and use thereof for decontaminating surfaces
US6689226B1 (en) 1999-09-20 2004-02-10 S.T.M.I. Société des Techniques en Milieu Ionisant Decontaminating organic gel and use thereof for decontaminating surfaces
FR2827530A1 (en) * 2001-07-17 2003-01-24 Commissariat Energie Atomique Surface treatment gel, especially for decontaminating ventilation shafts in nuclear plants, comprises a colloidal solution containing an inorganic viscosifier and a treatment agent
WO2003008529A1 (en) * 2001-07-17 2003-01-30 Commissariat A L'energie Atomique Method for treating a surface with a treating gel and treating gel
US7713357B2 (en) 2001-07-17 2010-05-11 Commissariat A L'energie Atomique Method for treating a surface with a treatment gel and treatment gel
US7718010B2 (en) 2001-07-17 2010-05-18 Commissariat A L'energie Atomique Method for treating a surface with a treatment gel, and treatment gel

Also Published As

Publication number Publication date Type
FR2380624B1 (en) 1980-03-07 grant

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Legal Events

Date Code Title Description
ST Notification of lapse