92 results about "Radioactive environment" patented technology

The invention provides a liquid sampling bottle sealing structure for a radioactive environment and a use method, and belongs to the technical field of sampling and sample sending in a radioactive environment factory building, and the liquid sampling bottle sealing structure is characterized in that a bottle plug main body is embedded into a bottle opening and is tightly attached to the inner side wall of the bottle opening to form a first layer of sealing; after the bottle plug main body is embedded into the bottle opening, the first sealing part is tightly attached to the end face of the bottle opening to form a second layer of sealing; the second sealing part is tightly attached to the inner wall surface of the bottle opening to form a third layer of sealing; through the triple extrusion sealing structure design of different positions of the sealing plug and the bottle opening, and three-stage sealing does not interfere with each other, good sealing inclusiveness between the sealing plug and the bottle opening is guaranteed, and it is guaranteed that sampling liquid in the bottle does not leak in the sampling and sample sending process; after sample liquid enters the sampling bottle, the sampling bottle does not need to be opened, and the second sealing part which protrudes outwards is embedded into the bottle opening and is clamped and locked with the bottle opening, so that the stability and the reliability of sealing connection between the sealing plug and the bottle opening are ensured, and the conditions that the state in the bottle is damaged and liquid leaks are prevented.

The invention relates to an acylhydrazone bond-connected covalent organic framework material, in particular to an acylhydrazone bond-connected covalent organic framework material as well as a preparation method and application thereof, and aims to overcome the defects of various materials for adsorbing Pd (II) in one aspect or the defects of poor stability and durability in high-acidity and high-radioactivity environments. Or the adsorption selectivity on Pd (II) is not strong. As an emerging crystalline organic porous polymer, the covalent organic framework is mainly formed by connecting pure organic structural units through dynamic covalent bonds, has the advantages of permanent high porosity, low density, high chemical stability, high thermal stability and the like, and is expected to realize Pd (II) adsorption in strong acid and ray irradiation environments.

The invention relates to the field of nuclear power, in particular to a control method for natural oxidation of a primary loop of a nuclear power plant. The method comprises the following steps: carrying out primary loop dissolved hydrogen control; primary loop nitrogen purging hydrogen removal; and the primary loop is naturally oxidized. The method is suitable for a VVER unit, the activity concentration of the activated corrosion product in a primary loop main system is reduced, deposition of the activated corrosion product on the surface of main equipment is reduced, and therefore the radiation dose field level in the unit maintenance period is reduced, and the irradiation dose of workers in the radioactive environment is reduced.

The invention relates to the related technical field of radiation intensity testing, in particular to a radiation intensity testing method for radioactivity protection, and the method comprises the steps: collecting data, carrying out the two-dimensional fusion, and setting a dynamic radiation pattern; correcting space distortion, and identifying and marking hot spot coordinates; and generating a protection instruction according to a protection optimization engine, updating a weight coefficient, and establishing a mapping table and an early warning model to perform efficiency verification, thereby solving the technical problems that noise and space distortion are liable to occur in radiation detection due to environmental electromagnetic interference, the accuracy and effectiveness of radiation protection are limited, and the radioactivity protection efficiency is further influenced. The method achieves the correction of the space distortion of the dynamic radiation intensity distribution diagram, adapts to a complex and changeable radioactive environment, improves the pertinence and effectiveness of radiation protection measures, guarantees the accuracy of a radiation detection result, reduces the measurement error caused by environmental electromagnetic interference, verifies and optimizes the radioactive protection efficiency, and improves the accuracy of the radiation detection result. And the overall efficiency of radioactive protection is improved.

The invention relates to the technical field of automatic control, and discloses a PLC-based seawater multi-nuclide separation automatic control method and system, and the method comprises the steps: obtaining analysis task parameters, such as a sample volume, a target nuclide type sequence, and the like; converting the data into an internal execution formula containing a precise time sequence and an actuator action sequence through PLC internal compiling logic; the method comprises the following steps: performing online pretreatment on original seawater based on sensor feedback of pH value, flow velocity and the like to obtain a sample flow with optimized conditions; according to system state data, multi-nuclide sequential adsorption is realized, and a separation column loaded with target nuclide is obtained; and sequentially eluting by using different eluents, and collecting to obtain the purified single nuclide component. The whole process runs in a full-automatic mode, the risk that experimenters are exposed to the radioactive environment is greatly reduced, errors caused by manual operation are effectively eliminated, and high consistency and traceability of analysis data of different batches and different monitoring mechanisms are guaranteed.

The invention provides a nuclear power plant CRDM middle weld joint machining tool and method. The machining tool comprises a cutter head and a tool assembly. And the cutter assembly is used for cutting the slope welding seam. The cutter assembly comprises a first cutter, a second cutter and a third cutter which are axially arranged around the cutter head at intervals. Wherein in the axial direction, the cutting tracks of the first tool, the second tool and the third tool coincide, and the cutting edge heights of the first tool, the second tool and the third tool are sequentially increased from bottom to top. Due to the design of the heights of the cutting edges of the three sets of cutters, the cutting process is more stable, the output of cuttings is reduced, the cuttings are easier to break, the cuttings which are too long and difficult to clean cannot be formed, the cleaning work is simplified, and potential safety hazards caused by incomplete cleaning of the cuttings are reduced. The labor intensity and the operation risk of constructors are reduced, especially in a radioactive environment, the exposure time of the constructors is shortened, and the construction safety is improved.

The application discloses an ultrasonic decontamination tank and ultrasonic decontamination device for radioactive environment, which comprises an ultrasonic decontamination tank shell, an ultrasonic decontamination tank top cover, a cooling mechanism, an ultrasonic oscillation mechanism and a gas removal mechanism. The ultrasonic decontamination tank top cover is rotationally connected with the ultrasonic decontamination tank shell, and is used for opening and closing the ultrasonic decontamination tank shell by rotating to a preset position. The cooling mechanism, the ultrasonic oscillation mechanism and the gas removal mechanism are arranged in the ultrasonic decontamination tank shell respectively. The ultrasonic oscillation mechanism is used for cleaning through ultrasonic oscillation, and the gas removal mechanism is used for removing the gas accumulated at the bottom of a decontamination container. The ultrasonic decontamination tank and the ultrasonic decontamination device for radioactive environment have good decontamination and cleaning effect on aerosol on the surface of a product container, control the spread of pollution, greatly reduce the pollution to subsequent related equipment and reduce the waste amount.

The fluorinated slag tank lid assembly includes an industrial robot A and an overhead platform. The end of the industrial robot A is equipped with a lid disassembly / assembly mechanism, which includes a double-shank bolt tightener, an electromagnetic chuck A with a floating buffer structure, and a hydraulic rotating joint. The overhead platform has a placement surface at its upper end, with a perforated hole at its center connecting to the lower overhead section. The advantages of this invention are: by using an industrial robot in conjunction with the double tightener and hydraulic joint, bolt disassembly / assembly and cover plate handling are replaced by manual labor, significantly improving work efficiency; the floating electromagnetic chuck avoids rigid collisions that could damage the flange sealing surface, ensuring docking stability; the perforated design of the overhead platform exposes the cover sealing ring groove, allowing for convenient replacement of the sealing ring without flipping the heavy cover; it is compatible with an anti-loosening spring bolt structure, preventing parts from scattering and simplifying automated material management; and it enables human-machine isolation operations, significantly reducing the risk of personnel exposure to radioactive environments.

The present invention relates to the technical field of radiation environment monitoring, and specifically discloses a method for the interim verification of radioactive sources in a radioactive environment laboratory, including the following steps: Step 1: Inspect the appearance of the radioactive source to determine whether there is damage. If damage occurs, it is determined that the verification fails and the source is scrapped; if the appearance is intact, proceed to the next step; Step 2: Use a radiation detector to measure the activity of the radioactive source, and compare the measurement result with the activity of the previous verification certificate after decay correction. If the result is determined to be satisfactory, the interim verification of the radioactive source passes; if the result is determined to be unsatisfactory, recalibrate with a third-party calibration agency. The method of the present invention can keep the radioactive source in a controlled state and ensure the accuracy of the detection results.

The present invention discloses a transfer device, including a transfer track and a transfer trolley. The transfer trolley is an integral module that can be hoisted and moved as a whole away from or placed on the transfer track. The transfer trolley includes a walking mechanism, a grabbing mechanism and a motor assembly. The grabbing mechanism is installed on the walking mechanism and is used to pick up and place the waste barrel. The walking mechanism is movably connected to the transfer track and is used to support the grabbing mechanism and move the waste barrel along the transfer track. The motor assembly is provided with two groups, and the two groups of motor assemblies are respectively connected to the walking mechanism and the grabbing mechanism. The walking mechanism, the grabbing mechanism and the motor assembly are all submodules that can be hoisted and moved separately, and each submodule can be detachably connected to form an integral module. The transfer device of the present invention adopts a modular layout form and has a reasonable structural arrangement. It can meet the requirements of remote maintenance, replacement and installation of vulnerable components on the basis of realizing transfer, and is suitable for radioactive environment working conditions. The present invention also provides a radioactive waste treatment system.

The invention belongs to the technical field of nuclear facility decommissioning, and particularly discloses an underwater laser cleaning and cutting combined machining device and a using method, cleaning and cutting are achieved through refraction and reflection of cleaning laser by scanning an X / Y-axis galvanometer set and a dichroscope and transmission of cutting laser by the dichroscope, and coaxial focusing is achieved through a common field lens; a gas-liquid coaxial composite nozzle is arranged at the bottom, and center auxiliary airflow and annular high-pressure laminar flow water can be independently regulated and controlled; millisecond-level process switching is matched, and instant cutting is carried out after cleaning is completed at the same underwater station. Aiming at the problems of low efficiency, high safety risk, more secondary pollution, poor cutting quality and the like in the decontamination and disintegration process of the high-level metal part of the nuclear power station, the invention does not generate radioactive waste liquid, effectively avoids secondary pollution, remarkably improves the cutting quality, the operation safety and the system reliability, and is suitable for green and efficient retirement operation in a high-radioactivity environment.

The invention discloses a sealed rotary joint, a mechanical arm and a nuclear industry robot, which can form a sealed channel in the sealed rotary joint and can enable a spool to be accommodated in the sealed channel so as to be prevented from being polluted by a radioactive environment, so that the decontamination difficulty of the sealed rotary joint is reduced. The sealing rotary joint comprises a first arm pipe, a second arm pipe and a rotary assembly. A first communicating hole is formed in the end face of the second arm pipe connecting end and communicates with the interior of the second arm pipe. The rotary assembly is fixed in the first arm pipe; after penetrating through the end face of the connecting end of the first arm pipe, the rotating part of the rotating assembly is fixedly connected with the connecting end of the second arm pipe in a sealed mode and used for driving the second arm pipe to rotate around the axis of the second arm pipe so that the second arm pipe can rotate relative to the first arm pipe; the rotating part of the rotary assembly is also hermetically and rotationally connected with the connecting end of the first arm pipe; a through hole is formed in the rotating part of the rotating assembly and communicates with the first communicating hole of the second arm pipe and the interior of the first arm pipe.

The invention provides an anti-corrosion process of a closed cooling water system in a radioactive environment, which comprises the following steps: step 1, adding lithium hydroxide into a primary loop closed cooling water system of a nuclear power plant, and adjusting the pH value of the primary loop closed cooling water system of the nuclear power plant to 9.5-10.5 through the lithium hydroxide; 2, hydrazine is added into the primary loop closed cooling water system of the nuclear power plant, and the dissolved oxygen concentration of the primary loop closed cooling water system of the nuclear power plant is controlled to be smaller than 50 micrograms per kilogram through hydrazine. By adding lithium hydroxide to adjust the pH value of the system and adding hydrazine to adjust the dissolved oxygen of the system, the problems that the influence of a radioactive environment on a corrosion inhibitor anti-corrosion process is hardly considered at present, so that when a part of newly-built nuclear power plants are designed in a primary loop closed type cooling water anti-corrosion process, the corrosion resistance of the system is influenced are solved; and neglecting the negative influence of the activation of the corrosion inhibitor on the personnel environment.

The invention discloses an electric melting furnace for a glass solidified body and an assembling method thereof.The electric melting furnace comprises a melting furnace body, an electrode, a heat preservation body, a top cover plate covering the melting furnace body and a melting pool arranged in the melting furnace body, a discharging opening used for discharging is formed in the bottom of the melting furnace body, and the heat preservation body is arranged outside the melting furnace body and the top cover plate; the electrode penetrates through the wall of the smelting furnace body and is used for heating a glass solidified body in a molten pool, the smelting furnace body is formed by piling up refractory bricks, a reserved gap value between the refractory bricks is smaller than a preset gap value, and the heat preservation body is an elastic heat preservation body. According to the electric melting furnace for the glass solidified body and the assembling method of the electric melting furnace, the electric melting furnace adopts a bottom discharging mode, the special requirements of the radioactive field on the aspects of heat preservation, shock resistance, insulativity and the like are met, no expansion gap is reserved in the electric melting furnace, the assembling process of electrodes and corresponding refractory bricks is defined, and the production efficiency is improved. And reliable use of the assembled electric melting furnace in a radioactive environment can be effectively guaranteed.

The present invention discloses a sealing surface cleaning, inspection and defect measurement device for use in a radioactive environment, comprising a traveling mechanism, wherein the traveling mechanism comprises a vehicle chassis, one end of which is provided with a driving system, and the vehicle chassis is also provided with a sealing surface cleaning module or an inspection and defect measurement module. The beneficial effect is that the device can effectively replace the existing manual operation mode, effectively reduce the radiation dose of personnel and improve the cleaning efficiency, avoid the blind spot of human eye inspection, and obtain three-dimensional visualization data of the sealing surface quality of the top cover. At the same time, the defect position can be located and the size can be measured, providing a reliable basis for defect judgment to ensure the integrity of the pressure boundary of a circuit.

The invention discloses a material for a cutting type cutter used for an anti-irradiation environment, a preparation process of the material and the cutter, and the preparation process comprises the following steps that (1) steel alloy powder is used as a matrix, WC powder and / or TiC powder are / is used as a hard phase, the two kinds of powder are mixed, and the steel alloy powder is formed by pre-sintering Fe powder, Ni powder, Cr powder, C powder and Mo powder; (2) pressing; (3) vacuum sintering; (4) forging; and (5) heat treatment is conducted in the modes of quenching, first tempering, deep cooling and second tempering, and the material for the cutting tool is obtained. According to the preparation process, a special heat treatment process is adopted, the hardness of the material is improved, meanwhile, the toughness of the material is not reduced, the proportion of martensite to austenite in matrix components reaches an ideal value, and therefore the effect of improving the wear resistance of the material is achieved; and the toughness of the cutting tool in the radioactive environment is greatly improved.

The embodiment of the invention relates to the technical field of radioactive substance sorting, in particular to a method for sorting samples in a hot cell, the samples have high radioactivity, and the method comprises the steps that feature images of simulation samples without radioactivity are obtained, the feature image of the simulation sample without radioactivity is similar to the feature image of the sample with high radioactivity; dispersing the mixed samples; obtaining an image of the dispersed sample; according to the obtained feature image, identifying an image with a predetermined feature from the obtained image of the sample; a sample corresponding to the image of the predetermined feature is picked up and placed at a predetermined position. By means of the method, multiple kinds of high-radioactivity samples can be accurately recognized and sorted in the high-radioactivity environment in the hot chamber, compared with an existing sorting mode, the accuracy and efficiency are higher, the radiation risk existing in manual operation can be avoided, and the sorting efficiency is improved. And the sorting safety is effectively improved.

The invention belongs to the technical field of measuring tools, and particularly relates to a support and hanger gap measuring device in a high-radioactivity environment, in the device, the center position of a fixed handle is movably connected with a rotating handle through a middle rotating shaft, one end of the rotating handle is provided with a measuring inclined plane, and the measuring inclined plane is an inclined plane; a measuring scale is fixedly mounted on the surface of the measuring slope, a fixed metal sheet is fixedly mounted on one side surface, close to the measuring slope, of one end of the fixed handle, and a reading datum line is arranged on the surface of the fixed metal sheet; a reference measuring sheet is fixedly installed at the edge of the other end face of the lower surface of the fixed handle, a measuring sheet is fixedly installed at the edge of the other end face of the lower surface of the rotary handle, and the initial scale on the measuring graduated scale corresponding to the reading reference line is the thickness of the measuring sheet and the reference measuring sheet when the measuring sheet and the reference measuring sheet are overlapped. Measurement work in a high-radioactivity environment can be rapidly and accurately completed, meanwhile, remote measurement and reading can be achieved, and personnel are prevented from getting close to the nuclear ray range.

A feedthrough for shielding against radioactive radiation includes electrical feedthrough conductors, a tubular metal housing, a connecting conductor, and shielding bodies. The tubular metal housing includes ends and seals, the ends including a seals so that an interior is formed in the tubular housing between the seals. The seals include an insulating body through which an electrical feedthrough conductor is fed so that the electrical feedthrough conductor is fixed in the seals while electrically insulated from the tubular housing. The connecting conductor extends in the interior and connects an electrical feedthrough conductor at one of the seals to an electrical feedthrough conductor at another of the seals. The shielding bodies, which are respectively interrupted by at least one opening therein, are arranged successively in an axial direction of the tubular housing, the connecting conductor being fed through the opening. The shielding bodies shield against radioactive radiation by way of shielding material.

The invention provides a sampling bottle receiving and sending device in a radioactive environment, and relates to the technical field of nuclear industry. The receiving and dispatching cabin is connected with the transition section; the flange is connected with the receiving and dispatching cabin; the receiving and dispatching cabin comprises a cabin body; the locking device is fixedly connected with the cabin body; the sealing door mechanism is fixedly connected with the cabin body through the locking device, and the locking device controls the sealing door mechanism to be opened or closed; when the bottle is taken, the locking device is controlled by the manipulator to unlock, the sealing door mechanism is opened, and the sampling bottle in the sealing door mechanism is taken out; when the sampling bottle is conveyed, the manipulator grabs the sampling bottle and places the sampling bottle in the sealing door mechanism, the manipulator controls the locking device to lock the sampling bottle, and the sealing door mechanism is closed. According to the scheme, the jamming and jamming phenomena occurring in the operation process are eliminated, the equipment failure rate can be reduced, the operation efficiency is improved, and reliable guarantee is provided for object transfer in the hot chamber.

The application discloses a welding device for a radioactive environment, which comprises a welding unit, a shielding unit, a maintenance unit and a channel. The welding unit is used for welding of parts in the radioactive environment. The shielding unit is installed outside the radioactive environment to shield the radiation of the radioactive environment. The maintenance unit is arranged outside the radioactive environment to maintain the welding unit. The channel passes through the shielding unit to connect the welding unit and the maintenance unit, so that the welding unit moves between the radioactive environment and the maintenance unit to connect the welding station and the maintenance station together. The welding device simplifies the remote indirect welding and maintenance operation, and can realize the maintenance and repair of the welding device by the operator outside the hot chamber, thereby ensuring the accuracy and safety of the operation.

The application discloses a multi-stage fastening system which can be quickly disassembled, comprising a cam connecting mechanism and a locking mechanism, the cam connecting mechanism comprising a connecting rod and a cam pressing rod, the cam pressing rod comprising a rear end cam and a front end pressing rod, one end of the connecting rod being connected with a first part, the other end of the connecting rod penetrating through the first part and a second part and being rotatably connected with the cam, the cam being provided with a transition curve section and a plurality of straight line sections, when the pressing rod is pressed downward to the second part to drive the cam to rotate, the transition curve section first contacts the second part, then each straight line section sequentially contacts and extrudes the second part to realize connection and multi-stage fastening, and the locking mechanism is arranged on the second part and used for clamping the pressing rod. The application also discloses a device used in a radioactive environment. The application has the advantages of fastening, multi-stage pre-tightening, high disassembly and assembly efficiency, wide application range and the like, and can meet the requirements of connection, adhesion and sealing of parts in a special environment such as radioactivity and the like which need to be conveniently and quickly disassembled and assembled.

The invention relates to an all-fiber in-place sensor in a radioactive environment and an all-fiber in-place sensor system thereof, in particular to an optical fiber quick connector which is convenient for a mechanical operation arm to quickly plug and pull, and the position of a moving target in the closed radioactive environment is accurately sensed by utilizing a transmission collimated light beam blocking principle. According to the invention, full photoelectric passivity is utilized, a good radiation-resistant optical fiber type device is provided, the structure is compact, the cost is low, the positioning precision is high, the response speed is high, the sensing range is large, and the device can be rapidly detached and replaced, and the requirement for accurate detection of the position of a moving part in an extreme hot chamber environment is met.

The present invention discloses a high-precision plasma cutting method and system in a radioactive environment, which relates to the technical field of nuclear industry decommissioning. The method includes collecting two-dimensional images of a target workpiece and performing stitching processing to obtain a two-dimensional stitched image, performing target recognition on the two-dimensional stitched image to obtain the positioning data of the target workpiece; collecting three-dimensional point cloud data of the target workpiece, performing stitching processing on the three-dimensional point cloud data to obtain the cutting boundary of the target workpiece; obtaining the optimal cutting trajectory of the target workpiece based on the positioning data and cutting boundary of the target workpiece, and using a plasma cutting tool head to cut the target workpiece according to the optimal cutting trajectory of the target workpiece. The present invention adopts high-precision image and point cloud data processing technologies, combined with an advanced template matching algorithm, to generate an optimal cutting path for various complex-structured objects to be cut, thereby improving the cutting efficiency and quality.

The invention discloses a sterile bottle for radiopharmaceuticals, and relates to the field of medical instruments, the sterile bottle comprises a bottle body, the bottle body is made of high density polyethylene and nano yttrium oxide composite modified materials; the bottle opening gasket is of a sandwich layered structure and comprises a puncture contact layer made of a medical-grade polytetrafluoroethylene film and with the thickness of 1-2.5 mm; the elastic sealing layer is made of brominated butyl rubber, and the thickness of the elastic sealing layer is 3-5 mm; and the adhesive interface layer is positioned between the puncture contact layer and the elastic sealing layer and is used for realizing the compounding of the layered structure. According to the present invention, the modified bottle body is formed by compounding the HDPE and the Y2O3 material, such that the gamma ray energy can be effectively captured and can be converted into the heat energy for diffusion, the breakage of the HDPE molecular chain due to the high energy ray impact can be reduced, the radiation aging resistance can be significantly enhanced, and the service life of the sterile bottle in the radioactive environment can be prolonged so as to meet the long-term safe storage requirement of the radioactive drug.

1. Name of the design product: Gamma ray protective clothing (split). 2. Use of the design product: Protective clothing used for wearing in a radioactive environment to shield rays and protect the human body. 3. Design key points of the design product: Lies in the shape. 4. Picture or photo that best shows the design key points: Perspective view in the combined state. 5. The top view of Kit 1, the bottom view of Kit 1, the top view of Kit 2, the bottom view of Kit 2, the top view in the combined state, and the bottom view in the combined state are not common, so the top view of Kit 1, the bottom view of Kit 1, the top view of Kit 2, the bottom view of Kit 2, the top view in the combined state, and the bottom view in the combined state are omitted. 6. Other circumstances that need to be explained: Other explanations: Kit 1 is a jacket with a detachable front placket, and Kit 2 is a pair of trousers with a detachable front placket.