WO2012165027A1 - Procédé de nettoyage/décontamination de partie interne de constructions polluées par des substances radioactives, et véhicule avec dispositif de nettoyage/décontamination - Google Patents

Procédé de nettoyage/décontamination de partie interne de constructions polluées par des substances radioactives, et véhicule avec dispositif de nettoyage/décontamination Download PDF

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Publication number
WO2012165027A1
WO2012165027A1 PCT/JP2012/058675 JP2012058675W WO2012165027A1 WO 2012165027 A1 WO2012165027 A1 WO 2012165027A1 JP 2012058675 W JP2012058675 W JP 2012058675W WO 2012165027 A1 WO2012165027 A1 WO 2012165027A1
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WO
WIPO (PCT)
Prior art keywords
cleaning
water
waste water
wastewater
decontamination
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Application number
PCT/JP2012/058675
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English (en)
Japanese (ja)
Inventor
上村　親士
昭彦 津田
Original Assignee
株式会社津田
有限会社情報科学研究所
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Application filed by 株式会社津田, 有限会社情報科学研究所 filed Critical 株式会社津田
Priority to CN201280025926.5A priority Critical patent/CN103827974A/zh
Publication of WO2012165027A1 publication Critical patent/WO2012165027A1/fr

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    • 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
    • G21F9/04—Treating liquids
    • G21F9/06—Processing
    • G21F9/12—Processing by absorption; by adsorption; by ion-exchange
    • B08B1/32—
    • 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

Definitions

  • the present invention relates to a cleaning decontamination method and a cleaning decontamination apparatus inside a structure contaminated with a radioactive substance. More specifically, the present invention relates to an oxidation / reduction treatment technique to remove contamination due to a radioactive substance, and to decontamination. The present invention relates to a cleaning and decontamination method and a cleaning and decontamination vehicle for the inside of a structure contaminated with a radioactive substance that can be reused by cleaning used wastewater.
  • the concrete surface of the inner wall and the exposed metal surface are oxidized due to high temperature exposure for a long period of time.
  • radioactive materials are taken into the oxidized materials, and highly concentrated radioactive materials accumulate on the walls and metal surfaces of nuclear power plants. Such contamination by radioactive substances is not easy because the contaminants are taken into the walls and the like.
  • radioactive substances are chemisorbed on concrete surfaces such as floors, walls, ceilings and removed easily. Difficult to do. Such contamination, unlike contamination in the reactor, has a large effect on the human body even at low levels, and its removal is performed by elution with a chelating agent, organic acid, etc. Since there is a residual radioactive material, there is a need for a technique for removing this to the limit.
  • Patent Document 1 discloses that the elution of metal ions from the corrosion film becomes large at an appropriate water temperature, and that the elution of metal ions is further promoted by the presence of hydrogen peroxide. A method of shutting down a boiling water reactor plant is described that removes material and reduces the air dose rate of the piping.
  • Patent Document 2 discloses a method for removing radioactivity on a cementitious surface, in which a cementitious surface contaminated with a radioactive substance is degraded by applying microorganisms, and residues containing the radioactive substance are removed by suction, scraping, or the like.
  • Patent Document 3 describes a radioactivity removal apparatus in a reactor pressure vessel that removes radioactivity by adsorbing it to an ion cladding, and Patent Document 4 injects a noble metal solution and hydrogen into a nuclear reactor.
  • An apparatus and method for attaching a noble metal to a nuclear reactor structure material in which a noble metal is attached to the structural material and an oxide film on the surface of the nuclear reactor structure is removed by a shot peening method are described.
  • Patent Document 5 describes a radioactivity removal apparatus that heats and pressurizes an extraction solvent of trifluoroacetylacetone to form a supercritical fluid and performs radioactivity decontamination.
  • Patent Document 6 cleans air with a paper filter.
  • Patent Document 7 describes a chemistry for decontaminating the surface of a steel material contaminated with radioactivity with dicarboxylic acid so that the decontamination solution used therein can be reused. Decontamination methods and chemical decontamination equipment are described.
  • the present invention has been made in view of the above-mentioned problems, and the object of the present invention is to apply an oxidation / reduction treatment technique to contaminate floors, walls, ceilings, etc. of structures such as factories by radioactive substances.
  • An object of the present invention is to provide a method for cleaning and decontaminating the inside of a structure contaminated with a radioactive material that can be reused by removing waste water used for decontamination.
  • the object of the present invention is to apply oxidation / reduction treatment technology to remove contamination of floors, walls, ceilings, etc. due to radioactive substances, and to clean and reuse waste water used for decontamination.
  • the object is to provide a vehicle for decontamination of a structure contaminated with radioactive material.
  • a cleaning and decontamination method for a structure contaminated with a radioactive substance is applied to a decontamination target contaminated with a radioactive substance at a potential of ⁇ 400 mV to ⁇ 600 mV.
  • a first adsorption stage that adsorbs and removes the cationized radioactive material in the washing wastewater by passing through the column, and the washing wastewater that has completed the first adsorption stage is treated with hydroxide ions.
  • a second adsorption stage for adsorbing and removing the anionized radioactive material in the washing wastewater by passing it through a column of the anion exchange resin, and a column filled with zeolite after the washing wastewater after the completion of the second adsorption stage.
  • a third adsorption stage for passing and adsorbing and removing radioactive substances remaining in the washing wastewater, and a washing wastewater after the completion of the third adsorption stage is treated with air microbubbles to produce highly biologically active water. And bubbling stage.
  • a vehicle for cleaning and decontaminating a structure contaminated with a radioactive substance is a reduced water connected to a water reduction treatment device that continuously generates reduced water.
  • a water supply hose, a suction device that sucks cleaning wastewater and contaminated dust, a cleaning wastewater transfer hose that is connected to the suction device and transports the suctioned cleaning wastewater and contaminated dust to a cleaning wastewater cleaning device, and the reduced water supply A cleaning device connected to the hose and the cleaning wastewater transfer hose and brushing the object to be decontaminated while spraying the reducing water.
  • the cleaning device is supported by an arm that can change the direction of the cleaning brush forward, down, left, and right, and includes a reducing water injection device, a rotating brush, and a cleaning waste water vacuum suction port. In addition, it is preferable that the cleaning waste water can be sucked at the same time.
  • the washing / decontamination apparatus vehicle is preferably an unmanned remote control type vehicle.
  • the decontamination inside the contaminated structure is performed by washing and decontamination using the reducing water having high adsorptivity of the radioactive substance as washing water. It is possible to efficiently decontaminate and restore the usable state without spreading the contamination, and to make the cleaning wastewater reusable as functional water.
  • the cleaning and decontamination apparatus vehicle inside the structure contaminated by the radioactive substance of the present invention it can cope with a wide range of radiation concentration environment, without diffusing the contamination inside the contaminated structure, It can be efficiently decontaminated and restored to a usable state.
  • the present invention uses a contaminated structure by cleaning and decontamination using cleaning water as reducing water having high adsorptivity to the radioactive substance in cleaning and decontamination of the internal environment of the structure contaminated by the radioactive substance.
  • cleaning water as reducing water having high adsorptivity to the radioactive substance in cleaning and decontamination of the internal environment of the structure contaminated by the radioactive substance.
  • the reduced water used as the washing water in the present invention has a different oxidation-reduction potential (Eh) (under normal temperature and normal pressure) depending on the reduction treatment conditions.
  • the potential of the reducing water used in the present invention is negatively charged from ⁇ 400 mV to ⁇ 600 mV in terms of the cleaning effect and solubility of the ionized radioactive substance.
  • the method for cleaning and decontaminating a structure is a cleaning method in which reducing water is sprayed and brushed on a decontamination target inside the structure such as a floor surface, a wall surface, or a ceiling surface contaminated with a radioactive substance.
  • a washing waste water collecting stage for collecting washing waste water, a filtration stage for sending washing waste water to a filter to filter coarse particles, a first adsorption stage for passing washing waste water through a first adsorption column, A second adsorption stage for passing through the second adsorption column; a third adsorption stage for passing through the third adsorption column; and a microbubble treatment stage for subjecting the washing wastewater to microbubble treatment.
  • the cleaning and decontamination method inside the structure differs depending on the size of the structure to be decontaminated, the contamination status, etc., so a manual method, a method using a passenger type vehicle with a protective device, an unmanned remote control vehicle Three examples of the method will be described with reference to the drawings.
  • FIG. 2 is an exemplary view for explaining a manual cleaning operation of the decontamination method according to the embodiment of the present invention.
  • the situation shown in FIG. 2 is a situation where three workers wearing protective clothing are cleaning and decontaminating the floor surface 1 contaminated with radioactive materials inside the structure by human power.
  • a worker has a reducing water injection gun 2 provided at the tip of a reducing water feed hose 3 connected to a reduction treatment tank 5, and sprays reducing water toward the floor surface 1.
  • the surface 1 is brushed, and another worker has a suction nozzle 12 provided at the tip of the suction hose 13 connected to the suction device 14, and sucks contaminated reduced water (hereinafter referred to as cleaning waste water) after cleaning.
  • the solution is sent to the wastewater treatment facility.
  • the radioactive material charged positively such as cesium, cobalt, strontium, etc. is efficiently used. Because it dissolves well and the water cluster is small, it has strong penetrating power and high detergency.
  • Reduced water is also negatively adsorbed to the decontamination target by spraying a large amount of negatively charged reduced water to the decontamination target, even for radioactive substances that are negatively charged, such as iodine. Since the charged radioactive substance is replaced with reduced water and the radioactive substance is transferred to the water side, an excellent cleaning effect is exhibited.
  • FIG. 4 is a diagram schematically showing a passenger-type radioactive material decontamination apparatus vehicle according to an embodiment of the present invention.
  • the cleaning and decontamination method using a passenger-type vehicle provided with a protective device corresponds to cleaning and decontamination inside a structure having a relatively large space where the radiation concentration is high and the working time is limited.
  • the passenger-type radioactive material decontamination apparatus vehicle is connected to the reduced water feed hose connected to the water reduction treatment apparatus, the suction apparatus that sucks the cleaning waste water and the contaminated dust, and the suction apparatus.
  • the passenger-type radioactive material decontamination apparatus vehicle is supported by an arm that can change the direction of the cleaning brush forward, down, left, and right, and the reduced water injection device, the rotating brush, and the cleaning waste water vacuum suction It is preferable to provide a mouth and to be capable of simultaneously performing injection of reducing water, brushing with a rotating brush, and suction of cleaning wastewater.
  • the passenger-type radioactive material decontamination apparatus vehicle uses a rotating brush device 27 with a heavy motor 28 as a left and right rotating arm 29, an upper and lower front rotating fulcrum 30, and hydraulic pressure.
  • This is a passenger-type radioactive decontamination vehicle equipped with a hose 34.
  • the vehicle can turn the rotating brush upward, forward, downward, left and right, and the vertical moving main arm allows the rotating brush to move up and down and move left and right.
  • FIG. 5 is a diagram schematically showing an unmanned remote control type radioactive material decontamination apparatus vehicle according to an embodiment of the present invention.
  • the method using the unmanned remote control vehicle corresponds to the cleaning and decontamination of the inside of the structure where the radiation dose is very high and a person cannot enter.
  • the unmanned remote control type radioactive material decontamination apparatus vehicle is similar to the occupant type radioactive material decontamination apparatus vehicle.
  • the reduced water feed hose connected to the water reduction treatment apparatus, the washing waste water, and the contaminated dust Connected to the suction device, and connected to the cleaning waste water transfer hose for transporting the suctioned cleaning waste water and contaminated dust to the cleaning waste water cleaning device, the reduced water feed hose and the cleaning waste water transfer hose for reduction.
  • a cleaning device that brushes the object to be decontaminated while spraying water.
  • the unmanned remote control type radioactive material decontamination apparatus vehicle of this embodiment will be described in detail.
  • This is an unmanned vehicle capable of remote control equipped with a reducing water supply hose 33 and a washing waste water suction hose 34.
  • the operation direction change of the apparatus vehicle is a system in which the command receiving antenna 44 catches a radio command while checking the position with the radioactivity measuring device 42 and the rotatable rotary camera 43 and operates.
  • the vehicle is provided with a front rotary brush 37 on the front surface and a plurality of bottom rotary brushes 38 on the bottom surface, and the reduced water is jetted from both sides downward from the reduced water injection port 36 to the front rotary brush 37. While the reducing water is jetted toward the floor surface, brushing is performed with a plurality of bottom rotating brushes 38, and cleaning wastewater contaminated by cleaning can be sucked and removed by a suction device 41 having a vacuum suction pipe built therein.
  • the unmanned remote control type radioactive material decontamination apparatus vehicle of the present embodiment is provided with a pair of moving wheels 40 on the left and right sides and four auxiliary casters 39 on the front and rear ends. By rotating, it is possible to smoothly rotate and change the direction on the spot, and to direct the brush on the front surface in a desired direction.
  • the cleaning and decontamination method for the inside of a structure according to the present invention can reduce the radioactive material of the contamination source in any of a manual method, a method using a passenger type vehicle with a protective device, and a method using an unmanned remote control vehicle. Since the reducing water dissolved in water and dissolved in the radioactive substance is collected and transferred to the treatment apparatus, the diffusion of the contamination does not occur, and the concentration of the contamination in the drainage can be avoided.
  • FIG. 3 is a diagram schematically showing a method for decontamination and regeneration of cleaning wastewater contaminated with radioactive substances in the decontamination method according to an embodiment of the present invention.
  • the decontamination and regeneration of the washing wastewater includes a first adsorption stage, a second adsorption stage, a third adsorption stage, and a microbubble treatment stage.
  • the suctioned and recovered cleaning wastewater is stored in the cleaning wastewater storage tank 16 through a filtration stage in which coarse particles are filtered by a filter (not shown), and the first adsorption stage for performing the first adsorption stage from the cleaning wastewater storage tank 16. 1 is sent to the adsorption column 18.
  • the first adsorption stage is a stage in which washing waste water is passed through the first adsorption column in order to adsorb and remove positively charged radioactive substances such as cesium, cobalt, and strontium in the washing waste liquid. May be a column filled with a mixture of clay and alum saturated with hydrogen ions or a column filled with a cation exchange resin saturated with hydrogen ions.
  • the washing waste water that has finished the first adsorption stage is sent to the second adsorption column 20 for performing the second adsorption stage.
  • the second adsorption stage is a stage in which a negatively charged radioactive substance such as iodine is passed through the second adsorption column in order to adsorb and remove, and as the second adsorption column, anion exchange saturated with hydroxide ions is performed.
  • a resin packed column 18 is used as the second adsorption column.
  • the washing waste water that has finished the second adsorption stage is sent to the third adsorption column 22 for performing the third adsorption stage.
  • the third adsorption stage is a stage for removing radioactive substances that could not be removed in the first and second adsorption stages, and a column filled with zeolite is used as the third adsorption column. Zeolite is porous and negatively charged, and the radioactive material is drawn into the porous material and adsorbs the radioactive material very strongly.
  • the first and second adsorption It is possible to adsorb and remove radioactive substances that could not be removed in stages.
  • the washing wastewater that has finished the third adsorption stage is sent to the microbubble generation apparatus 24 by the powerful pump 23 in order to perform the microbubble treatment stage.
  • the microbubble treatment stage is a stage where air microbubbles are generated in the cleaning wastewater from which radioactive substances have been removed to return it to highly biologically active water.
  • the microbubble generator used in this stage is a cavitation method, etc. A well-known thing can be used.
  • Recycled purified water generated after the microbubble treatment stage is sent to the decontamination purified water tank 25 and can be reused from the water outlet 26.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning In General (AREA)

Abstract

L'invention concerne un procédé de décontamination de partie interne de constructions polluées par des substances radioactives qui permet d'éliminer la pollution du sol, des murs, du plafond, ou similaire, de la partie interne de constructions polluées par des substances radioactives, avec une eau de réduction pour eau de nettoyage, tout en permettant la réutilisation après purification d'un effluent mis en œuvre pour la décontamination. Le procédé de l'invention comporte : une étape de nettoyage au cours de laquelle l'objet de la décontamination pollué par des substances radioactives, est soumis à un brossage par dispersion d'une eau de réduction chargée négativement et de potentiel électrique compris entre -400mV et -600mV; une étape de récupération d'effluent de nettoyage au cours de laquelle l'effluent de nettoyage est récupéré; une étape de filtrage au cours de laquelle l'effluent de nettoyage est envoyé dans un filtre, et des solides grossiers sont filtrés; une première étape d'adsorption au cours de laquelle l'effluent de nettoyage passe à travers une colonne remplie d'un mélange d'argile et d'alun saturé par des ions hydrogènes, ou à travers une colonne remplie d'une résine échangeuse de cations saturée par des ions hydrogènes, et les substances radioactives cationisées à l'intérieur de l'effluent de nettoyage sont éliminées par adsorption; une seconde étape d'adsorption au cours de laquelle l'effluent de nettoyage passe à travers une colonne remplie d'une résine échangeuse d'anions insaturée par des ions hydroxyde, et les substances radioactives anionisées à l'intérieur de l'effluent de nettoyage sont éliminées par adsorption; une troisième étape d'adsorption au cours de laquelle l'effluent de nettoyage passe à travers une colonne remplie de zéolite, et les substances radioactives restant à l'intérieur de l'effluent de nettoyage sont éliminées; et une étape de traitement de microbulles au cours de laquelle l'effluent de nettoyage est soumis à un traitement à l'aide de microbulles d'air, et est transformé en une eau de bioactivité élevée.
PCT/JP2012/058675 2011-05-28 2012-03-30 Procédé de nettoyage/décontamination de partie interne de constructions polluées par des substances radioactives, et véhicule avec dispositif de nettoyage/décontamination WO2012165027A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201280025926.5A CN103827974A (zh) 2011-05-28 2012-03-30 被放射性物质污染的构造物内部的清洗去污染方法以及清洗去污染装置车辆

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JP2011-132666 2011-05-28
JP2011132666 2011-05-28

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WO2012165027A1 true WO2012165027A1 (fr) 2012-12-06

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150306644A1 (en) * 2012-08-22 2015-10-29 Hideo Yoshida Method for decontaminating soil and the like and system for decontaminating soil and the like
FR3027150A1 (fr) * 2014-10-12 2016-04-15 Conseils Et Etudes En Radioprotection (Cerap) Dispositif et procede pour la decontamination d’une piscine radioactive
JP2016133362A (ja) * 2015-01-16 2016-07-25 株式会社神戸製鋼所 放射性汚染水貯留タンクの除染方法及び放射性汚染水貯留タンクの除染システム

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104900285B (zh) * 2015-04-08 2017-11-07 武汉网绿环境技术咨询有限公司 一种含放射性核素污染物的治理方法
CN106297933B (zh) * 2015-05-22 2018-03-06 森元信吉 辐射能污染水的处理方法和核电站的密封处理方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007309864A (ja) * 2006-05-22 2007-11-29 Toshiba Corp 除染方法、除染装置および原子力施設
JP2009511653A (ja) * 2005-10-05 2009-03-19 コミツサリア タ レネルジー アトミーク 表面を除染するための吸引可能ゲルおよびその使用
JP2009238861A (ja) * 2008-03-26 2009-10-15 Dainippon Screen Mfg Co Ltd 基板処理装置および基板処理方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009511653A (ja) * 2005-10-05 2009-03-19 コミツサリア タ レネルジー アトミーク 表面を除染するための吸引可能ゲルおよびその使用
JP2007309864A (ja) * 2006-05-22 2007-11-29 Toshiba Corp 除染方法、除染装置および原子力施設
JP2009238861A (ja) * 2008-03-26 2009-10-15 Dainippon Screen Mfg Co Ltd 基板処理装置および基板処理方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150306644A1 (en) * 2012-08-22 2015-10-29 Hideo Yoshida Method for decontaminating soil and the like and system for decontaminating soil and the like
US9770742B2 (en) * 2012-08-22 2017-09-26 Hideo Yoshida Method for decontaminating soil and the like and system for decontaminating soil and the like
FR3027150A1 (fr) * 2014-10-12 2016-04-15 Conseils Et Etudes En Radioprotection (Cerap) Dispositif et procede pour la decontamination d’une piscine radioactive
WO2016058973A1 (fr) * 2014-10-12 2016-04-21 Conseils Et Etudes En Radioprotection (Cerap) Dispositif et procédé pour la décontamination d'une piscine radioactive
JP2016133362A (ja) * 2015-01-16 2016-07-25 株式会社神戸製鋼所 放射性汚染水貯留タンクの除染方法及び放射性汚染水貯留タンクの除染システム

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CN103827974A (zh) 2014-05-28

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