EP0631291A1 - Solution de décontamination de tissus contaminés par l'argent 110m et procédé de décontamination d'un tel tissu - Google Patents

Solution de décontamination de tissus contaminés par l'argent 110m et procédé de décontamination d'un tel tissu Download PDF

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Publication number
EP0631291A1
EP0631291A1 EP94401416A EP94401416A EP0631291A1 EP 0631291 A1 EP0631291 A1 EP 0631291A1 EP 94401416 A EP94401416 A EP 94401416A EP 94401416 A EP94401416 A EP 94401416A EP 0631291 A1 EP0631291 A1 EP 0631291A1
Authority
EP
European Patent Office
Prior art keywords
solution
decontaminating
silver
tissue
concentration
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.)
Ceased
Application number
EP94401416A
Other languages
German (de)
English (en)
French (fr)
Inventor
Daniel Revy
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
Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP0631291A1 publication Critical patent/EP0631291A1/fr
Ceased 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
    • G21F9/002—Decontamination of the surface of objects with chemical or electrochemical processes

Definitions

  • the present invention relates to a decontamination solution for tissue contaminated with silver Ag 110 m , as well as to a method for decontamination of such tissue using this decontamination solution.
  • the object of the invention is therefore to develop a specific decontaminating solution for this type of contamination.
  • this solution for decontaminating tissues contaminated with silver Ag 110 m comprises: - an aqueous ammoniacal solution whose concentration is between 2.63 and 52.5 g / l in which silver nitrate AgNO3 is dissolved, at a concentration between 12 and 18 mg / l, and a surfactant at a concentration between 12 and 24 g / l.
  • This cycle of steps can be repeated several times, depending on the residual contamination accepted for a given type of fabric or garment.
  • the solution for decontaminating tissue contaminated with silver Ag110 m comprises an aqueous ammoniacal solution whose concentration is between 2.63 and 52.5 g / l and preferably between 10.5 and 52.5 g / l.
  • silver nitrate AgNO3 and a surfactant are dissolved in said ammonia solution.
  • the concentration of silver nitrate in the ammoniacal solution is between 12 and 18 mg / l, or better still between 15 and 16 mg / l.
  • the concentration of the surfactant varies between 12 and 24 g / l.
  • the surfactant is preferably chosen from anionic or nonionic detergents, such as, for example, alkylsulfonates, alkylarylsulfonates, ethoxylated alkylphenols or ethoxylated alcohols. These products are known under the brands RBS, TEEPOL or SKIP, for example.
  • the silver from the AgNO3 solution replaces Ag 110m which was in the contaminated tissue.
  • samples were taken by cutting and brought into contact with different concentrations of the decontaminating solution, in 100 ml beakers, kept under stirring and at heating temperatures between 45 and 90 ° C.
  • the measurements were carried out on a 40% efficiency germanium diode HP.
  • the signal processing was carried out by an INTERTECHNIQUE spectrometer (registered trademark) equipped with INTER-GAMMA software, (registered trademark).
  • Table 1 sample number and initial contamination contamination of the first washing solution (Bq) decontamination factor (%) contamination of the second washing solution (Bq) decontamination factor (%) contamination of the third washing solution (Bq) residual contamination on the tissue (Bq) 1 (105 Bq) 100 ⁇ 5 95.2 5 ⁇ 1 4.8 ⁇ 0.5 ⁇ 0.5 2 (94 Bq) 91 ⁇ 5 96.8 2.9 ⁇ 0.6 3.1 - ⁇ 0.5 3 (98 Bq) 92 ⁇ 8 93.8 4.4 ⁇ 0.8 4.5 - 2.2 ⁇ 0.7
  • the average of the results gives a decontamination factor of 95.1% after the first wash and 4.1% after the second wash.
  • the residual contamination of the tissue is close to 1%.
  • Table 2 sample number and initial contamination contamination of the first washing solution (Bq) decontamination factor (%) contamination of the second washing solution (Bq) decontamination factor (%) residual contamination on the tissue (Bq) 1 (95 Bq) 86 ⁇ 5 90.5 4.6 ⁇ 0.7 4.9 3.5 ⁇ 0.8 2 (78 Bq) 72 ⁇ 4 92.3 5.3 ⁇ 0.8 6.8 0.8 ⁇ 0.2 3 (86 Bq) 81 ⁇ 4.3 94.2 3.5 ⁇ 0.7 4.1 1.4 ⁇ 0.2
  • Table 3 sample number and initial contamination contamination of the first washing solution (Bq) decontamination factor (%) contamination of the second washing solution (Bq) decontamination factor (%) residual contamination on the tissue (Bq) 1 (86 Bq) 78 ⁇ 5 90.7 3.8 ⁇ 0.7 4.4 3.9 ⁇ 1 2 (75 Bq) 70.5 ⁇ 4.2 94 4 ⁇ 0.8 5.3 0.9 ⁇ 0.2 3 (85 Bq) 77 ⁇ 4.8 90.5 3.7 ⁇ 0.6 4.3 3.5 ⁇ 4.2
  • the average of the results gives a decontamination factor of 91.7% after the first wash and 4.7% after the second wash. Furthermore, the residual contamination on the fabric is 3.3%.
  • Table 4 sample number and initial contamination contamination of the first washing solution (Bq) decontamination factor (%) contamination of the second washing solution (Bq) decontamination factor (%) contamination of the third washing solution (Bq) residual contamination on the tissue (Bq) 1 (325 Bq) 273 ⁇ 15 84 41 ⁇ 4 12 5.7 ⁇ 1.7 5.8 ⁇ 1.5 2 (175 Bq) 156 ⁇ 12 89 16 ⁇ 2.3 9.1 ⁇ 0.5 3.1 ⁇ 0.8
  • the average of the results gives a decontamination factor of 86.5% after the first washing and 10.5% after the second washing. Furthermore, the residual contamination on the fabric is 1.8%.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Detergent Compositions (AREA)
EP94401416A 1993-06-25 1994-06-23 Solution de décontamination de tissus contaminés par l'argent 110m et procédé de décontamination d'un tel tissu Ceased EP0631291A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9307766 1993-06-25
FR9307766A FR2707036B1 (uk) 1993-06-25 1993-06-25

Publications (1)

Publication Number Publication Date
EP0631291A1 true EP0631291A1 (fr) 1994-12-28

Family

ID=9448566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94401416A Ceased EP0631291A1 (fr) 1993-06-25 1994-06-23 Solution de décontamination de tissus contaminés par l'argent 110m et procédé de décontamination d'un tel tissu

Country Status (2)

Country Link
EP (1) EP0631291A1 (uk)
FR (1) FR2707036B1 (uk)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998053462A1 (en) * 1997-05-16 1998-11-26 British Nuclear Fuels Plc A method for cleaning radioactively contaminated material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60199969A (ja) * 1984-03-19 1985-10-09 三菱重工業株式会社 放射能汚染衣類の洗浄方法
FR2575775A1 (fr) * 1984-12-10 1986-07-11 Quadrex Hps Inc Methode et appareil pour nettoyer des vetements et tissus contamines par des contaminants nucleaires, chimiques et/ou biologiques
JPS61195400A (ja) * 1985-02-25 1986-08-29 東京電力株式会社 放射性核種を含有する廃液の処理方法
FR2591791A1 (fr) * 1985-12-18 1987-06-19 Gallo Lucien Composition permettant la decontamination des tenues de protection contre les radiations nucleaires

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60199969A (ja) * 1984-03-19 1985-10-09 三菱重工業株式会社 放射能汚染衣類の洗浄方法
FR2575775A1 (fr) * 1984-12-10 1986-07-11 Quadrex Hps Inc Methode et appareil pour nettoyer des vetements et tissus contamines par des contaminants nucleaires, chimiques et/ou biologiques
JPS61195400A (ja) * 1985-02-25 1986-08-29 東京電力株式会社 放射性核種を含有する廃液の処理方法
FR2591791A1 (fr) * 1985-12-18 1987-06-19 Gallo Lucien Composition permettant la decontamination des tenues de protection contre les radiations nucleaires

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DATABASE INIS INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA), VIENNA, AT; VANURA, P. ET AL: "Modification of laundry waste water cleanup technology for water containing new washing powders. Modifikace technologie cisteni pradelenskych odpadnich vod pro vody obsahujici nove praci prostredky." *
DATABASE WPI Week 8547, Derwent World Patents Index; AN 85-292403 *
DATABASE WPI Week 8641, Derwent World Patents Index; AN 86-268617 *
NUKLEON. (1988) (NO.1) P. 22-26. CODEN: NKLNA3 ISSN: 0302-8542, CZECHOSLOVAKIA *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998053462A1 (en) * 1997-05-16 1998-11-26 British Nuclear Fuels Plc A method for cleaning radioactively contaminated material
AU724767B2 (en) * 1997-05-16 2000-09-28 British Nuclear Fuels Plc A method for cleaning radioactively contaminated material
AU724767C (en) * 1997-05-16 2001-12-20 British Nuclear Fuels Plc A method for cleaning radioactively contaminated material

Also Published As

Publication number Publication date
FR2707036B1 (uk) 1995-09-22
FR2707036A1 (uk) 1994-12-30

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