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57 results about "Radioactive decontamination" patented technology
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Radiation Decontamination RDS is a nuclear technology solutions company specializing in the decontamination of radioactive surfaces including: commercial, nuclear power plants, homeland security, emergency, and first responder applications. See Raddecon Products. being used in Japan.
Dry vertical shaft storage system for spent fuel of nuclear power station and storage method thereof
ActiveCN101740147AReduce the amount of wasteAvoid influenceNuclear energy generationReactor fuel elementsNuclear powerRadioactive agent
The method provides a dry vertical shaft storage system for spent fuel of a nuclear power station and a storage method thereof. The system comprises a loading subsystem, a storage subsystem, a reloading subsystem, a transferring subsystem, a residual heat discharge subsystem, a negative pressure ventilation subsystem, a fuel suction subsystem and an air blowing subsystem. The system saves a water-cooling system and a water purification system on the basis of the water storage method; the storage vertical shaft is arranged underground, so that the influence of an external event can be effectively prevented, such as airplane crash; when the spent fuel needs to be transferred, a spent fuel storage tank can be taken out of a storage depot, and then directly loaded in a spent fuel shielding transport cask through lifting equipment so as to be conveniently transported; a plant and structural equipment are not polluted by radioactive materials, so the spent fuel storage depot can be normally disassembled and retired after the spent fuel storage tank is transferred; radioactive decontamination is not needed and the spent fuel storage depot can be conveniently retired; and the storage tank can be processed in different phases to reduce initial cost according to the operation of the power station.
Owner:CHINERGY CO LTD
Reparation method of self-embrittled radioactive decontamination coating
InactiveCN102690579ATo achieve the effect of decontaminationAchieve the purpose of separationCoatingsEmulsionRadioactive decontamination
The invention discloses a preparation method of a self-embrittled radioactive decontamination coating. The self-embrittled radioactive decontamination coating is prepared by performing copolymerization on a methacrylic acid monomer and a methyl methacrylate monomer through emulsion. Crosslinking agent is added into the prepared polymer emulsion so as to realize complexing and crosslinking of polymer molecular chain sections in the emulsion, and the emulsion can be self-embrittled and stripped off after being painted, molded and solidified, thus being separated from a contaminated object; and a certain amount of complexing agent is added into the polymer emulsion to perform a complexing adsorption action on radioactive nuclide particles, thus fulfilling the aim of clearing radioactive nuclide. The self-embrittled coating can be applied to radioactive decontamination in general occasions and on the surface of complicated structural parts; and brittle sheets produced by decontamination can be collected mechanically, so that the radiation amount to an operator can be reduced.
Owner:SOUTHWEAT UNIV OF SCI & TECH
Vacuumable gel for decontaminating surfaces and use thereof
ActiveCN101278358AGood removal effectAvoid washing with waterAqueous liquid non-soap compositionsDetergent compounding agentsStrong acidsRadioactive decontamination
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES +1
Vacuumable Gel for Decontaminating Surfaces and Use Thereof
ActiveUS20080228022A1Accelerated dryingPromote recoveryAqueous liquid non-soap compositionsDetergent compounding agentsOxidation-Reduction AgentRedox
The present invention relates to a vacuumable gel that can be used for decontaminating surfaces, and also to the use of this gel. The decontamination may be, for example, a radioactive decontamination. The gel of the present invention is composed of a colloidal solution. It comprises from 5 to 25 wt % of an inorganic viscosity modifier relative to the total weight of the gel; from 0.01 to 0.2 wt % of a surfactant relative to the total weight of the gel, and, particularly preferably, a surfactant in an amount strictly below 0.1 wt % relative to the total weight of the gel; from 0.5 to 7 mol, per litre of gel, of an inorganic acid or base; and optionally from 0.05 to 1 mol, per litre of gel, of an oxidizer having a standard redox potential E0 greater than 1.4 V in a strong acid medium or of the reduced form of this oxidizer; the remainder being water. It may be applied, by spraying, to a surface to be decontaminated, and removed in the form of dry residues by suction or brushing after drying.
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES +1
Mobile on-line radioactive decontamination system for nuclear power plant
InactiveCN106098129AReduce radiation doseEasy to operateRadioactive decontaminationNuclear plantNuclear power
The invention discloses a mobile online radioactive decontamination system for a nuclear power plant, which includes a mixing tank, an injection pump, a buffer tank, a decontamination pump and an electric heater. The decontamination system includes at least two movable modules, and each movable module All are equipped with input and output interfaces for connecting with other movable modules or equipment to be decontaminated; mixing tanks, injection pumps, buffer tanks, decontamination pumps and electric heaters are respectively set in the movable modules; when in use, the The movable module is moved to a suitable position, and the movable module and the online equipment to be decontaminated are connected to each other in a predetermined order through the connection interface, so that the liquid in the mixing tank can pass through the pipeline in turn through the injection pump, buffer tank, decontamination pump and electric decontamination pump. After the heater enters the equipment to be decontaminated, the equipment to be decontaminated is decontaminated online. The advantages of the present invention are as follows: the present invention can carry out online decontamination of the equipment to be decontaminated in the nuclear power plant, thereby simplifying the operation, reducing the radiation dose of personnel and reducing the risk of radiation exposure.
Owner:中广核工程有限公司 +1
Radioactive surface strippable detergent and preparation method thereof
ActiveCN111909559AImprove stabilityGood decontamination effectCoatingsRadioactive decontaminationPolyvinyl alcoholAdhesive
The invention relates to a radioactive surface strippable detergent and a preparation method thereof, and belongs to the technical field of application of polymer chemical coating materials to nuclearfacility surface radioactive decontamination. The radioactive surface strippable detergent is prepared by taking polyvinyl alcohol as a main film-forming agent, taking water as a solvent and adding an auxiliary agent, wherein the auxiliary agent is prepared from the following components: a gelatinizing agent, a dispersing agent, a reinforcing agent, a surfactant, an adhesive, a chelating agent, an auxiliary film-forming agent, a lubricating agent, an anti-freezing agent, a plasticizer, Vaseline, an emulsifying agent and a thickening agent. The prepared strippable film detergent is good in film-forming property, long in quality guarantee period and good in strippability, and can meet the operation requirements of short-term and medium-term storage and stainless steel surfaces for radioactive waste pits and hot chambers.
Owner:SOUTHWEAT UNIV OF SCI & TECH
Radioactive decontamination
InactiveUS6444097B1Lower Level RequirementsOrganic compounds purification/separation/stabilisationPhysical/chemical process catalystsMelting tankSurface layer
A method for the removal of embedded contamination from a metallic surface in which a laser beam is directed on to the contaminated surface. The laser beam has sufficient power density to cause direct ejection of laser-generated melt pool liquid from the metallic surface thereby removing a metallic surface layer containing the embedded contamination. Means are provided for the collection of laser ejected material in order to prevent recontamination of the metallic surface or contamination of previously uncontaminated surfaces.
Owner:NUCLEAR DECOMMISSIONING AUTHORITY
Composite laser decontamination device and method for radioactive decontamination of nuclear power plant components
ActiveCN108597638AAccurate detectionImprove decontamination abilityAnalysing solids using sonic/ultrasonic/infrasonic wavesAnalysis by thermal excitationNuclear powerLight beam
The invention discloses a composite laser decontamination device and method for radioactive decontamination of nuclear power plant components. The composite laser decontamination device comprises at least two laser emission modules, light beam shaping modules which are in one-to-one correspondence with the laser emitting modules, and a laser shaping module, wherein the laser emitted by the laser emitting module enters the corresponding beam shaping module for beam shaping, and then enters the laser shaping module for laser shaping, finally is output to the surface of the to-be-decontaminated base layer of the nuclear power plant component, wherein the pulse width of the laser emitted by each laser emitting module is different, and a corresponding laser emission module is determined to openaccording to the surface attachment condition of the to-be-decontaminated base layer. The novel composite laser decontamination solution is provided for nuclear power station decontamination, and a corresponding laser emitting module is selected and opened according to the actual situation of the to-be-decontaminated surface.
Owner:SUZHOU NUCLEAR POWER RES INST +2
Vacuumable gel for decontaminating surfaces and use thereof
ActiveUS8636848B2Easy to disassembleInorganic/elemental detergent compounding agentsAqueous liquid non-soap compositionsOxidation-Reduction AgentStrong acids
The present invention relates to a vacuumable gel and the gel use to decontaminate surfaces, for example, radioactive decontamination. The gel is composed of a colloidal solution comprising:from 5 to 25 wt % of an inorganic viscosity modifier;from 0.01 to 0.2 wt % of a surfactant, preferably, a surfactant in an amount strictly below 0.1 wt %, wt % relative to the total weight of the gel;from 0.5 to 7 mol, per liter of gel, of an inorganic acid or base; andoptionally from 0.05 to 1 mol, per liter of gel, of an oxidizer having a standard redox potential Eo greater than 1.4 V in a strong acid medium or of the reduced form of this oxidizer;the remainder being water.The gel may be applied, by spraying, to a surface to be decontaminated, and removed in the form of dry residues by suction or brushing after drying.
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES +1
Polyvinyl alcohol-based strippable film detergent, preparation method and use method thereof
ActiveCN111909558AExcellent decontaminationGood film formingCoatingsRadioactive decontaminationActive agentSurface-active agents
The invention relates to a polyvinyl alcohol-based strippable film detergent, a preparation method and a use method thereof, and belongs to the technical field of application of polymer chemical detergents to nuclear facility surface radioactive decontamination. The polyvinyl alcohol-based strippable film detergent takes 100-300 parts by weight of polyvinyl alcohol as a main film-forming agent andwater as a solvent, and is added with the following components in parts by weight: 2-10 parts of a gelatinizing agent, 1-6 parts of a surfactant, 2-10 parts of an adhesive, 1-5 parts of a thickeningagent, 2-10 parts of a reinforcing agent, 0.5-2.0 parts of a composite chelating agent, 1-5 parts of a dispersing agent, 1-5 parts of a lubricating agent, 5-10 parts of a plasticizer and 2-8 parts ofa preservative, wherein the composite chelating agent is composed of EDTA-2Na and sodium tripolyphosphate according to a weight ratio of 1-3:1-3. The prepared strippable film detergent is excellent indecontamination performance, good in film-forming property, long in shelf life and good in strippability, and has very high application value.
Owner:SOUTHWEAT UNIV OF SCI & TECH
Pressure drainage type radioactive sewage filter
PendingCN110947218AIngenious and reasonable structureSolving Sealed Connection IssuesStationary filtering element filtersNuclear plantNuclear power
The invention provides a pressure drainage type radioactive sewage filter, and belongs to the technical field of radioactive decontamination of nuclear power plants. The filter comprises a shielding shell, an inner cylinder and a positioning sealing disc, an outer ring and an inner ring on the lower surface of the positioning sealing disc are respectively aligned and hermetically welded to upper ports of the shielding shell and the inner cylinder, and an interlayer space formed by welding the inner cylinder, the shielding shell and the positioning sealing disc is filled with a shielding lead plate, a recess for embedding a filter element adapter disc is formed in the middle of the upper surface of the positioning sealing disc, a shielding ring is fixed around the recess, the middle part ofthe filter element adapter disc is a filter element area, vertical drainage holes are distributed in the periphery of the filter element adapter disc at intervals, a shielding cover is arranged on the upper surface of the filter element adapter disc, an isolating ring for separating the filter element area from the vertical drainage holes is arranged on the lower surface of the shielding cover, and a medium inlet hole and a medium outlet hole are formed in the shielding cover. By the pressure drainage type radioactive sewage filter, the filtering effect can be guaranteed, the ideal anti-radiation performance is achieved, and maintenance and replacement are convenient.
Owner:AEROSUN CORP
Process and device for low-level radioactive wastewater MVC evaporation in nuclear power plant
PendingCN109147982AEasy to installIncreased radioactive decontamination factorRadioactive decontaminationNuclear plantLiquid waste
The invention provides a device for low-level radioactive wastewater MVC evaporation in a nuclear power plant. According to the invention, a steam recompressor fully enhances the taste of secondary steam for heating of an external heating natural-circulation heating chamber, so a fresh heat source is not needed to be replenished except that an external heat source is required for first starting; awaste liquid is adopted to exchange heat with condensed water, so a large amount of cooling water is no longer needed to fully condense secondary steam; and a secondary separator with higher efficiency is adopted, so radioactive decontamination factors can be further increased by 10 to 100 times .
Owner:DALIAN DESIGN INST CO LTD CHINA FIRST HEAVY IND +1
A high-strength peelable film for radioactive decontamination, its preparation method and application
ActiveCN108034324BHigh strengthHigh decontamination efficiencyAntifouling/underwater paintsPaints with biocidesSulfidationRadioactive decontamination
The invention discloses a radioactive dirt-removing high-strength strippable film as well as a preparation method and application thereof. The invention aims to solve the problems that the existing stripping type pressing dirt removing agent is mainly applied to pressing and removal of large-area radioactive fallout materials and has certain limitation on removal of loose pollution. The radioactive dirt-removing high-strength strippable film is prepared from the following raw materials in percentage by weight: 50 to 70 percent of polyisoprene, 0.3 to 3 percent of sulfur, 0.25 to 3 percent of nanometer white carbon black, 0.3 to 2 percent of an accelerant ZDC, 0.5 to 2 percent of an anti-ageing agent, 0.1 to 1 percent of zinc oxide, 0.05 to 1.0 percent of casein, 0.5 to 2 percent of EDTA, 0.02 to 0.5 percent of a dispersing agent BX, 20 to 40 percent of water and the like. The polyisoprene base material is subjected to vulcanization modification and is compounded with other components to obtain the radioactive dirt-removing high-strength strippable film, and the defects that the original strippable film has insufficient strength and is not liable to strip are effectively overcome. Through actual verification, the strippable dirt-removing agent has high film-forming strength and the tensile strength can reach 110 kg / cm<2>; and furthermore, in actual application, the surface pollution can be removed to below the clearance level (less than 0.08 Bq / cm<2>), and remarkable progressive significance is achieved.
Owner:MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
Saturated steam decontamination device
Owner:CNNC FUJIAN FUQING NUCLEAR POWER
Cleaning tool for detection device for nuclear reactor rod cluster control assembly (RCCA)
ActiveCN103157627AImprove efficiencyIncreased flexibility of useCleaning processes and apparatusNuclear reactorRadioactive decontamination
The invention belongs to the technical field of nuclear power plant equipment radioactive decontamination, particularly relates to a cleaning tool for a detection device for a nuclear reactor rod cluster control assembly (RCCA). A connection plate is in a rectangular hollow cavity structure, a plurality of holes communicated with the rectangular hollow cavity are evenly distributed in one lateral surface, and two ashore air pipe connectors communicated with the rectangular hollow cavity are symmetrically installed on the other lateral surface. Cleaning rods are respectively in a cylindrical hollow cavity structure, wherein a plurality of air holes are evenly distributed in each cleaning rod. A connection handle is in a rectangular plate-shaped structure, wherein a plurality of through holes are evenly distributed in the connection handle. A plurality of the cleaning rods are combined into a cleaning rod group through the connection handle, the upper end of each cleaning rod is connected and fixed with one through hole in the connection handle and is connected with a corresponding hole in the connection plate through an air pipe, an air source is respectively connected with the two ashore air pipe connectors through a pipeline, and the pipelines between the air source and the two ashore air pipe connectors are sequentially provided with a stop valve and a pressure regulating valve. The cleaning tool for the detection device for the nuclear reactor RCCA is capable of effectively removing pollutant on the detection device, and lowering the radioactive dosage of the detection device.
Owner:RES INST OF NUCLEAR POWER OPERATION +1
Cleaning tool for detection device for nuclear reactor rod cluster control assembly (RCCA)
ActiveCN103157627BImprove efficiencyIncreased flexibility of useCleaning processes and apparatusNuclear reactorRadioactive decontamination
Owner:RES INST OF NUCLEAR POWER OPERATION +1
Method for the radioactive decontamination of soil by dispersed air flotation foam and said foam
The present invention relates to a process for treating an earth contaminated by at least one radionuclide such as cesium 137Cs comprising at least one step of separating said radionuclide by dispersed air flotation foam produced by blowing air bubbles in a suspension comprising said earth and at least one collector. The present invention also relates to the flotation foam obtained by implementing such a process.
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Movable radioactive decontamination device
The invention belongs to the technical field of radioactive decontamination treatment and particularly relates to a movable radioactive decontamination device. The movable radioactive decontamination device comprises a cleaning tank with a hanging basket, a tank cover, a manual spraying device, a spraying valve, a stainless steel heater, an ultrasonic generator, rubber wheels with brakes, a blow-off pipe and a rack. The cleaning tank with the hanging basket is installed in the rack, the tank cover is arranged on the top of the rack, and the rubber wheels with the brakes are installed in the four corners of the bottom of the rack respectively. A circulating filtration system is arranged at the bottom of the cleaning tank with the hanging basket. The manual spraying device is connected with one end of the spraying valve, and the other end of the spraying valve is connected with the circulating filtration system. The stainless steel heater is installed on the right side of the cleaning tank with the hanging basket. The blow-off pipe is installed on the left side of the cleaning tank with the hanging basket. The ultrasonic generator is installed on a tank body of the cleaning tank with the hanging basket. The problems existing in existing decontamination equipment can be solved, the decontamination efficiency is high, and the movable radioactive decontamination device is suitable for radioactive movable radioactive decontamination device of small parts of a nuclear power plant.
Owner:JIANGSU NUCLEAR POWER CORP
Oxidation decontamination gel as well as preparation method and application thereof
The invention belongs to the technical field of radioactive decontamination, and relates to oxidation decontamination gel as well as a preparation method and application thereof. The oxidation decontamination gel is prepared from the components including, by weight, 5%-15% of a gel base material serving as a gel framework material, 5%-10% of a surfactant, 0.5%-5% of a thixotropic multiplication agent, 3%-20% of a strong oxidant, 3%-20% of acid, 1%-5% of a modifier and 25%-82.5% of water. By means of the oxidation decontamination gel as well as the preparation method and application thereof, the oxidation decontamination gel can be better prepared, the prepared oxidation decontamination gel is the oxidation gel for decontamination of second-generation radioactive contaminated metal, water washing is not needed after decontamination is completed, the residual oxidation decontamination gel can be automatically dried and cracked, and a brush is conveniently used for cleaning, or a dust collector is used for sucking and collecting the gel, so that secondary liquid waste is not generated in the decontamination process, and the gel is more suitable for field decontamination.
Owner:CHINA INST FOR RADIATION PROTECTION
Radioactive decontamination wet tissue and preparation method thereof
ActiveCN114197207AHigh densityEasy to wipeOrganic detergent compounding agentsSurface-active detergent compositionsSodium acetateDiethylenetriamine
The invention provides a radioactive decontamination wet tissue and a preparation method thereof.The radioactive decontamination wet tissue comprises a wet tissue body and decontamination liquid infiltrated in the wet tissue body, and the wet tissue body is made of dust-free cloth; the decontamination solution is prepared from the following raw materials: ultrapure water, fatty alcohol-polyoxyethylene ether, isopropanol, 2-carboxyl phosphonoacetic acid and pentasodium diethylenetriamine pentaacetate. The preparation raw materials adopt ultrapure water and isopropanol as solvents, and do not contain halogen, sulfur, water-soluble high-molecular compounds and the like, so that the influence on metal materials in nuclear industry equipment or pipelines can be avoided, and the increase of radioactive liquid waste caused by the water-soluble high-molecular compounds can be avoided. The 2-carboxyl phosphonoacetic acid and the diethylenetriamine sodium pentaacetate are compounded to have relatively strong complexing property on actinide nuclides and transition metals, and particularly have relatively strong complexing and dispersing performance on radioactive cation nuclides, and the introduced isopropanol and fatty alcohol-polyoxyethylene ether can effectively reduce the surface tension of the decontamination solution and improve the decontamination efficiency; therefore, the residual quantity after decontamination is very low.
Owner:YANGJIANG NUCLEAR POWER +2
Modular mobile type purification device for airborne radioactive matter
PendingCN110164577AReduce the size of the moduleEasy to carryRadioactive decontaminationComputer moduleModular design
The invention relates to a modular mobile type purification device for airborne radioactive matter. The device comprises an air inlet module, a fan module, and a filter part arranged between the air inlet module and the fan module; and the filter part comprises one or more selected from a smoke filter module, an aerosol filter module and an iodine adsorption module, the filter part is selectivelycombined with the air inlet module and the fan module according to the requirements in a use occasion, and the modules are tightly connected by connecting mechanisms and sealed by sealing members. According to the device provided by the invention, through the modular design, the modules can be separately transported, moved and further recombined; through a combination of the modules, the filteringrequirements in different environments can be realized; and through arrangement of an easily-torn film of an outer shell, the easily-torn film can be peeled off every time after the device is used, so that the problem of surface contamination of the device can be effectively solved.
Owner:CHINA NUCLEAR POWER ENG CO LTD
Nuclear power plant movable master pump impeller radioactive decontamination apparatus
ActiveCN106816198AReduced risk of corrosionMaintenance timeRadioactive decontaminationImpellerEngineering
Owner:JIANGSU NUCLEAR POWER CORP
Method for producing radioactive strontium-90 and caesium-137 simultaneously by adopting centrifugal extractor
The invention discloses a method for producing radioactive strontium-90 and caesium-137 simultaneously by adopting a centrifugal extractor and belongs to the technical field of radioactive wastewatertreatment. The method includes: adopting the centrifugal extractor, taking crown ether as an extraction agent of <90>Sr to extract radioactive <90>Sr in high-level liquid waste after acid adjustment,adopting nitrite acid solutions of different concentrations as washing agents and back extracting agents, and sequentially washing and back extracting extraction agents loaded with impurities and <90>Sr elements to obtain radioisotope <90>Sr products; taking crown as an extraction agent of <137>Cs, extracting radioactive <137>Cs from high-level liquid waste after <90>Sr is extracted, adopting nitrite acid solutions of different concentrates in the centrifugal extractor as washing agents and back extracting agents, sequentially washing and back extracting extraction agents loaded with impurities and <137>Cs to obtain radioisotope <137>Cs products. The method has the advantages of good transferring effect, high selectivity of <90>Sr and <137>Cs and radioactive decontamination factor and thelike, continuous production can be realized, and two kinds of high-purity radioisotope<90>Sr and <137> Cs products with important applications are obtained efficiently.
Owner:TSINGHUA UNIV
Method for removing radioactive contamination deposited oxide
PendingCN113990541AIncrease concentrationOptimizing componentsRadioactive decontaminationCleaning using liquidsRadioactive contaminationRadioactive decontamination
The invention belongs to the technical field of radioactive decontamination, and relates to a method for removing radioactive contamination deposited oxides. The method comprises the following steps: (1) oxidizing and decontaminating a part by using an oxidizing decontaminating agent solution; (2) rinsing the component; (3) reducing and decontaminating by using a reducing decontaminant solution of the part; (4) rinsing the component; and (5) airing the components. According to the method for removing the radioactive contamination deposited oxide, the metal oxide deposited on the surface of the zinc injection reactor component can be removed on the basis of a traditional chemical decontamination technology, and a base body is not damaged.
Owner:CHINA INST FOR RADIATION PROTECTION
Ultra-low pressure reverse osmosis system and method for treating iodine ions in radioactive polluted water by using same
InactiveCN109621727AGood effect of removing iodineEfficient removalReverse osmosisRadioactive decontaminationEngineeringStock solution
The invention provides an ultra-low pressure reverse osmosis system, wherein a feeding device is provided with a raw water tank; a stock solution at an outlet of the raw water tank is pressed into a multi-medium filter through a centrifugal pump; the multi-medium filter changes membrane pressure through a multi-stage pump and enables the stock solution to enter a reverse osmosis membrane componentfor treatment; and a concentrated water outlet pipe of the reverse osmosis membrane component is provided with a valve to adjust a standard recovery rate of the system. The invention also discloses amethod for treating iodine ions in radioactive polluted water by adopting the system, which comprises the following steps: under the conditions that the operating pressure is 0.3-0.8MPa, the temperature is 20+ / -3 DEG C and the standard recovery rate of the system is 15.0%-17.0%, the maximum radioactive decontamination factor of iodine ions of the reverse osmosis system can reach 920 by using a polyamide roll composite membrane. The method can effectively remove iodine ions in radioactive polluted water, the separation process has no phase change, energy consumption is low and operation can becarried out at normal temperature. The method has wide application prospect in the fields of emergency water supply, radioactive wastewater treatment, nuclear concentration and the like in sudden nuclear accidents.
Owner:TIANJIN UNIV
Radioactive decontamination efficiency test method
PendingCN110132795ADiffusion does not causeX/gamma/cosmic radiation measurmentNeutron radiation measurementRadioactive wasteRadioactive decontamination
The invention discloses a radioactive decontamination efficiency test method. The test method comprises the following steps: (I) testing the decontamination efficiency of detergent on radioactive dustin the air; and (II) testing the decontamination efficiency of the detergent on the surface contaminated by the radioactive dust. The invention provides a radioactive decontamination efficiency testmethod, which comprises a test method for the decontamination efficiency of the detergent on the radioactive dust in the air and a test method for the decontamination efficiency of the detergent on the surface contaminated by the radioactive dust; quantitative analysis is carried out on the spraying amount of the detergent, the atomizing effects of different atomizing nozzles are compared and analyzed so as to judge whether radioactive nuclides can be effectively captured by the detergent. According to the test method disclosed by the invention, measurement is mainly carried out in a closed box body, and diffusion of the radioactive dust in a large amount is not caused.
Owner:RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
Composite nanosecond laser decontamination device and method for radioactive decontamination
ActiveCN112382428ARealize smelting release controlRealize requirementsRadioactive decontaminationCleaning processes and apparatusNanosecond laserOptical Module
The invention discloses a composite nanosecond laser decontamination device and method for radioactive decontamination. The cooperative decontamination method comprises the following steps: driving anoptical module of the composite nanosecond laser decontamination device to perform scanning type stepping movement above a to-be-decontaminated workpiece, and keeping a preset time interval between two adjacent stepping movements, after each stepping movement, firstly starting a high-efficiency nanosecond laser, stopping the high-efficiency nanosecond laser after running for a first time period,starting an ultra-high-energy nanosecond laser after running for a second time period, stopping the ultra-high-energy nanosecond laser after running for a third time period, and stopping the ultra-high-energy nanosecond laser until the high-efficiency nanosecond laser is started next time at an interval of a fourth time period; and making the optical module perform stepping movement according to the steps until the upper surface of the to-be-decontaminated workpiece is scanned. The two paths of lasers cooperate at intervals for composite operation, dirt attached on a surface to be cleaned canbe removed after once scanning, deep peeling and decontamination of a radioactive member can be completed, and the decontamination efficiency is improved.
Owner:SUZHOU NUCLEAR POWER RES INST +2
Pressurized water reactor nuclear power station radioactive decontamination system and process arrangement structure thereof
PendingCN114550962AThe structure of the process layout is simpleEmission reductionNuclear energy generationRadioactive decontaminationPressurized water reactorNuclear power
The invention relates to a pressurized water reactor nuclear power station radioactive decontamination system and a process arrangement structure thereof. According to the decontamination system and the process arrangement structure thereof provided by the invention, the decontamination equipment and the decontamination waste liquid collection equipment provided by the decontamination system are reasonably arranged in the decontamination workshop; the purposes that the decontamination workshop where the decontamination system is located is simple in process arrangement structure form, small in occupied space, high in decontamination operation working efficiency, easy and convenient to operate and capable of being remotely controlled are achieved. Meanwhile, decontamination equipment in the decontamination system is novel, the discharge amount of decontamination waste liquid is small, the safety of operators is guaranteed, collection and treatment of the decontamination waste liquid are facilitated, and the storage and treatment capacity of the waste liquid is further improved. In addition, according to the process arrangement structure provided by the invention, the arrangement number of pipelines and cables is also simplified, so that the arrangement of the whole decontamination system and matched facilities reaches the optimal design as far as possible.
Owner:CHINA NUCLEAR POWER ENG CO LTD
An ultra-low pressure reverse osmosis system and its method for treating iodide ions in radioactively polluted water
InactiveCN109621727BGood effect of removing iodineEfficient removalReverse osmosisRadioactive decontaminationPolyamideWastewater disposal
The invention provides an ultra-low pressure reverse osmosis system. The feeding device is provided with a raw water tank, and the raw liquid at the outlet of the raw water tank is pressed into a multi-media filter through a centrifugal pump. The raw liquid enters the reverse osmosis membrane module for treatment, and the concentrated water outlet pipe of the reverse osmosis membrane module is provided with a valve to adjust the standard recovery rate of the system. It also discloses a method for treating iodide ions in radioactively polluted water by using the system, using a polyamide roll-type composite membrane, operating at an operating pressure of 0.3-0.8MPa, a temperature of 20±3°C, and a system standard recovery rate of 15.0%-17.0%. Under certain conditions, the radioactive decontamination factor of the reverse osmosis system for iodide ions can reach up to 920. The invention can effectively remove iodide ions in radioactively polluted water, has no phase change in the separation process, low energy consumption and operates at normal temperature. It has broad application prospects in the fields of emergency water supply, radioactive wastewater treatment and nuclear enrichment in sudden nuclear accidents.
Owner:TIANJIN UNIV
Automatic detection and classification device for radioactive contamination parts of nuclear power station
PendingCN113399316AReduce the risk of exposure to radiationImprove work efficiencySortingRadiation riskNuclear engineering
The invention belongs to the technical field of nuclear power station radioactive decontamination, and provides an automatic detection and classification device for radioactive contamination parts of a nuclear power station. The automatic detection and classification device is characterized in that a conveying mechanism is arranged on a rack and is used for conveying the radioactive contamination parts, and a clamping mechanism is arranged on the rack and is used for clamping and moving the radioactive contamination parts; and a radiation detector is arranged on the rack and is used for carrying out radioactivity detection on the radioactive contamination parts clamped by the clamping mechanism, and a storage part is arranged on the rack and is used for storing the radioactive contamination parts which are clamped by the clamping mechanism and are qualified or unqualified after radioactivity detection. According to the automatic detection and classification device, radioactive detection can be automatically carried out on the radioactive contamination parts, the radioactive contamination parts which are detected to be unqualified are automatically classified and collected in the storage part, and the radioactive contamination parts which are detected to be qualified are conveyed to the next station by the conveying mechanism to be automatically classified and collected, so that the working efficiency is remarkably improved, and the radiation risk of workers can be reduced.
Owner:GUANGDONG NUCLEAR POWER JOINT VENTURE +3
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