587 results about "Radioactive contamination" patented technology

The present invention belongs to a process for extracting and separating thorium from sulfo-phosphoric mixed acid and extracting rare earth chloride. Said process adopts primary amine added mixed alcohol as extracting agent, and makes direct fractionation of rare earth slurry to extract thorium, and the thorium content in the separated rare earth slurry is ThO2/REO is less than or equal to 5X10 to the minus sixth. Said invention utilizes the thorium being in organic phase and adopts countercurrent reextraction process by means of nitric acid to obtain thorium nitrate product, its purity is 99%, and thorium recovery is up to 99%. Said invention adopts magnesium oxide precipitation method to remove the iron and phosphorus in the rare earth reffinate, uses ammoniated P507-kerosene to extract organic phase.

This invention relates to a the 3D color pattern slab formed by sintering ceramic powder, which is formed by pressing and sintering ceramic powders with minimum diameter of 0.1 mm-0.8 mm to provide a 3D color pattern slab formed by sintering ceramic powder, which is characterized in that, the ceramic product includes clear cut ceramic sintered pattern regions having 2-10 various kinds of colors or different shades of a single or mixed colors; at least 2 types of pattern regions each occupies 10%-90% of the total area of the ceramic product, in which at least each pattern region having at least one type of colored ceramic powder uniformly distributed in 80%-100% of the pattern area and 70%-100% from surface to the inside 70%-100% of the thickness of the ceramic product; also, in a 1 mm-20 mm intersecting region between said two types of colored pattern regions, the mixture ratio of the different colored powder material between two different color pattern regions can reach from 1:50 to 50:50. In this way imitation stone slab imitating natural stone in 3D space, with virtues of lower water absorption, less color difference, and higher degree of smoothness, and free of radioactive contamination etc.

The invention relates to an on-line visual pack absence detection device and a detection method for a cigarette pack cartoning machine. A visual unit collects images during the cigarette pack cartoning process, and is connected with a data management system via an Ethernet switch for data communication. A barcode scanner and a control module collect cigarette carton barcode information and transmit the cigarette carton barcode information to the data management system. An input and output control module receives rejecting signals of the visual unit, and outputs the rejecting signals to a warning and rejecting module. The method comprises the steps of initializing the detection device; judging whether a cigarette pack of a certain layer in the cartoning machine is in place; if in place, processing, analyzing and transmitting images of the cigarette pack of the layer to the data management system; judging whether the cigarette pack of the layer has any defect; if so, emitting warming and rejecting signals. The invention prevents the radioactive pollution caused by radioactive substances in the measurement process and the contact pollution caused by artificial weighing measurement, reduces the system complexity, and avoids huge industrial control computer chassis or huge system control cabinets.

The invention discloses a method for testing oil and water contribution of each segment of a volume fractured horizontal well by using a chemical tracer. The method mainly comprises the following four key links: first, determining types of an oiling agent and a water aqua; second, estimating use amount of the oiling agent and the water aqua in each segment; third, making injection methods of the oiling agent and water aqua in each segment of a horizontal well clear; four, in a flowback and production process of a fracturing fluid, sampling and analyzing and testing, determining production concentration of an effective tracer material in the oiling agent and water aqua in each segment, and calculating oil-producing water-producing contribution rate of each segment. The method solves problems in a previous tracer monitoring technology that when stratum absorption, bacteria encroachment, radioactive contaminatin, and special operation occur, a tracer material is used up, and only liquid producing contribution can be evaluated.

The embodiment of the invention discloses a mobile environment monitor, for enhancing the automatic monitor, automatic location and real-time transmission functions of the system and improving the system emergency response and real-time monitor under emergency state. The mobile environment monitor is arranged with an automobile gamma radiation automatic monitor, a globe positioning system GPS, two wireless communication devices which can be switched and a safe and reliable automobile power supplier, to confirm the operation stability and the reliability of real-time monitor and transmission of the system. An emergency environment radiation monitor network adopts a digit electronic map technique adopting a geographic information GIS as a software platform, to real-timely display the gamma radiation monitor data and the GPS positioning information of the monitor on the electronic graphic interface of each network monitor station, thereby in-timely and accurately finding wind direction radioactive contamination region for nuclear power station accidents and providing reliable monitor information for emergency commanders, based on the decision of operational intervention level.

The invention discloses a radiation protection control method for unit operation and maintenance during fuel damage of a pressurized water reactor nuclear power station. The radiation protection control method comprises the steps of: carrying out radiation control through scavenging and chemical operation of a main loop; monitoring relevant channel radioactivity conditions; measuring and evaluating air pollution of a production site; implementing iodine removal and scavenging on a reactor plant aiming at the radioactive contamination condition; and carrying out collective protection and personnel protection on the production site. Aiming at the defect of personal iodine internal contamination caused by poor radiation protection control after fuels of the pressurized water reactor nuclear power station are damaged in the prior art, the invention provides the radiation protection control method capable of carrying out effective control and protection without causing internal contamination to workers.

The invention provides a treatment method of fused salt chlorination slag. The method comprises the following steps: leaching fused salt chlorination slag by water or a dilute acid solution; then, extracting and back-extracting the leaching liquid by using a blank organic phase I as an extractant and an alkaline solution I as a back-extractant so as to obtain a back-extract I; after adjusting the acidity of the back-extract I by acid, extracting and back-extracting the back-extract I by using a blank organic phase II as the extractant and an alkaline solution II as the back-extractant so as to obtain a residual extraction solution II and a back-extract II; adding a scandium precipitator to the residual extraction solution II and filtering and calcining to obtain scandium oxide; and mixing the back-extract II and a thorium and uranium precipitator, and filtering to obtain a thorium and uranium enriched substance. Compared with existing treatment of fused salt chlorination slag, the method provided by the invention not only extracts scandium with high additional value, but also recovers thorium and uranium in waste residue, so that radioactive contamination is eliminated. Meanwhile, chemical materials used in the treatment method provided by the invention are simple and easy to obtain, and the method is lower in cost and simple in process.

The invention provides a wet-mixed mortar modifier. Every 1,000 parts of the wet-mixed mortar modifier comprises 15-20 parts of sodium tripolyphosphate, 1-2 parts of sodium hexametaphosphate, 4-5 parts of phosphonobutane tricarboxylic acid, 32-44 parts of glucose, 24-33 parts of citric acid, 50-80 parts of zeolite powder, 80-100 parts of silica fume, 200 parts of heavy calcium carbonate, 10-15 parts of starch ether, 20-40 parts of hydroxyethyl methyl cellulose ether, 1-2 parts of sodium dodecyl sulfate, 28-50 parts of a polycarboxylate superplasticizer, 20-25 parts of a polycarboxylate slump retaining agent, 40-80 parts of a naphthalene-based superplasticizer, 20-25 parts of redispersible latex powder, 8-10 parts of beta-cyclodextrin and the balance of fly ash. The plasticity-maintaining time of the wet-mixed mortar modifier is prolonged to 36 h, the later strength and bondability of the wet-mixed mortar are improved simultaneously, the mortar durability is improved, the problems of high probability of hollowing, cracking, leaking and the like of plastering mortar are solved, and the wet-mixed mortar modifier has low energy consumption and is free of chemical and radioactive contamination.

The invention discloses an artificial quartz plate and a production method thereof. According to the plate, an artificial stone product is obtained by taking quartz sand, quartz powder and broken glass pieces as main raw materials, adding a coupling agent, an accelerator and a curing agent and bonding and curing by organic resin, wherein the addition proportion of the broken glass pieces can achieve more than 25%. The production method comprises the steps: (1) determining a formula; (2) preparing production equipment; (3) mixing raw materials; (4) paving raw materials; (5) carrying out extrusion forming; (6) performing constant-temperature drying; (7) polishing, cutting, laminating and packaging. The artificial quartz plate product produced by using the method is hard and compact in texture, indeformable, non-cracking, non-discoloring, free from color fading, durable, and simple to maintain. Due to the use of a great amount of broken glass pieces, the influence of waste glass on the environment can be reduced, the produced plate does not contain any pollutant source and radiation source, and is wide in applications, thus being a novel environment-friendly and green building decoration material which has no radiation pollution and can be recycled.

The invention relates to a latex enhanced immunoturbidimetry kit for measuring the content of C peptide in human serum, a preparation method of the kit and a method for detecting the content of C peptide in human serum by use of the kit. The kit comprises a first reagent, a second reagent and a calibrator, wherein the first reagent contains buffer solution, electrolyte, a surface active agent, a stabilizing agent, a reaction enhancer and a preservative; the second reagent contains buffer solution, electrolyte, a surface active agent, a preservative and anti-human C peptide antibody enveloped sensitization polystyrene latex particles; and the calibrator contains buffer solution, a surface active agent, a stabilizing agent, a preservative and human C peptide protein. Compared with the existing kit used clinically, the kit provided by the invention has strong specificity, high sensitivity and high accuracy, the kit is suitable for biochemical analyzers of common detection mechanism, has short detection time, can be operated conveniently, has low detection cost, has no radioactive contamination, and is suitable for popularization and application clinically.

The invention discloses a method for monitoring horizontal well staged fracturing effects by a micro-element tracer. The method mainly includes the steps: 1) selecting a micro-element with low background concentration as the tracer; 2) estimating the dosage of the tracer at each stage according to the dosage of fracturing fluid at each stage; 3) adding the tracers into a fracturing blender truck by a constant-flow pump through a ground low-pressure pipeline, and adding different tracers into different layer stages in fracturing; 4) performing cluster sampling on fracturing flow-back fluid after fracturing, detecting concentration of the tracer in the flow-back fluid, drawing a curve of the concentration of the tracer along with time variation, calculating water yield of each stage, analyzing fracture morphology after each stage is fractured, determining contribution of each stage to the water yield, and defining connectivity between a well bore and a well after fracturing. The method solves the problems that signal-to-noise ratio is low, reliability is poor, cost is high, radioactive contamination is generated, and the fracturing effects of each stage cannot be accurately evaluatedafter horizontal well staged fracturing is implemented.

The present invention discloses a method for detecting third type hepatitis virus antibody by using magnetic micro-particle as transporting species which includes steps as follows: (1) using magnetic micro-particle as transporting species for reacting and separating, coupling third type hepatitis virus antibody on the magnetic micro-particle surface; (2) adding into confining liquid, oscillating 10 min with middle speed under condition of 20-40 deg c, magnetic separating, giving up supernatant; (3) combining the third type hepatitis virus antibody packed on the magnetic micro-particle surface with the specificity antibody on waited blood; (4) separating the magnetic micro-particle with specificity antigen-antibody complex on surface through an externally-applied magnetic field; (5) combining the antibody complex on the magnetic micro-particle surface with enzyme label rat mouse-anti-body IgG; (6) using chemiluminescence detector, irradiancy substrates A liquor and B liquor for detecting sample irradiancy value. The method has characteristics of rapid detecting speed, high specificity, stabilising, no radioactive pollution which can increase sensitivity and stabilizing ability for detecting.

The invention discloses a method for manufacturing a silicone modified double-sided double-color flexible decorative brick. The double-sided double-color flexible decorative brick is composited by three layers, the middle layer is a glass fiber reinforced layer (2), and a silicone modified polymer color sand A paste layer (1) and a silicone modified polymer color sand B paste layer (3) are respectively coated on the upper surface and the lower surface of the glass fiber reinforced layer, wherein the thicknesses of the coating layers of the A paste and the B paste can be controlled according to design requirements, and the colors of the A paste and the B paste can be the same or different according to design requirements. The double-sided double-color flexible decorative brick produced by adopting the manufacturing method of the invention has the advantages of good flexibility, light weight per unit area, no radioactive contamination, realistic stone-like and pottery-like patterns on the appearance, high manufacturing efficiency, energy saving and environmental protection without high-temperature sintering, weather resistance, wear resistance, vapor permeability, fire resistance, convenience of use and like.

A carbonizing chlorination process for extracting cerium and non-Ce rare-earth elements from rare-earth ore and separating them from each other includes such steps as low-temp carbonizing chlorination while adding defluorinating agent for selective chlorination and separating out non-rare earth elements, high-temp chlorination while chemical gas-phase delivery and water dissolving for separating out radioactive elements and alkali-earth elements, leaching in diluted aicd for separating Ce from non-Ce rare-earth elements, and chemical gas-phase delivery for separating the non-Ce rare-earth elements from each other.

The invention relates to a conductance-tracer relative method which is applied in injecting well flow quantity measurement, which mainly solves the problems that in the injecting well flow quantity measurement field, the existing measuring methods have some limitation on application. The method is characterized in that the method comprises the following steps: manually measuring through adding external destabilization in single-phase flow which is injected in a well, utilizing a marked solution releaser to release marked solution with high electric conductivity in liquid, the marked solution moves with liquid to flow to an up stream and a down stream sensor pair, diffused non-uniformity can form detectable hydrodynamic noise in the process of moving with liquid, hydrodynamic noise signal of a sensor can have excellent similarity as time variety tendency in sensitive areas of two sensor pairs, thereby achieving the purpose of utilizing conductance type relative flow quantity sensor to measure the flow quantity of injecting water. The conductance-tracer relative method has the advantages of low production cost, low starting output volume, excellent repeatability and uniformity, which has no movable members and blocking element, and has no radioactive pollution.

The invention relates to a chemical decontaminating agent and a decontamination method. The chemical decontaminating agent contains acids, bromides, molybdates, surfactants, corrosion inhibitors, anti-settling agents and deionized water. The chemical decontaminating agent is mainly applied to eliminate radioactive contamination during decommissioning and operation of nuclear facilities, reduces corrosion to facilities of different materials, and has a high decontamination factor (DF) of common nuclides. Besides, the chemical decontaminating agent has a good stability.

A method for carrying out a comprehensive quality control of MOX fuel rods, including measurement of plutonium content of pellets contained in the rod, check of internal structure and constituents in the rod, including the detection of rogue pellets, and measurement of dimensional characteristics and radioactive contamination along the rod surface, by moving the fuel rod axially, performing concurrently the measurements and checks along the fuel rod moved axially, using radiometry and radiography. An apparatus for carrying out the method.

The Hyd-RO-Secure™ System combines individual elements of aqueous and other fluid treatment technology into a treatment train including various devices for pre-treatment tailored to the source solution, a conventional reverse osmosis membrane treatment process, a RASco-designed Advanced Simultaneous Oxidation Process (ASOP™), and various devices for post-treatment tailored to the characteristics of the end-user needs and demand patterns; wherein the combination of technologies create a unique system for safely and cost-effectively removing chemical, biological, or radiological contamination from aqueous solutions.

This invention relates to a method for removing radioactive contamination on object surfaces and an eradicator, which applies a loop circulation method or a tank dipping method to remove the contaminated metal then rinses and dries it. The eradicator prepared with deionized water includes: HNO3 0.1-6.0mol/L and (NH4)2Ce(NO3)60.001-1.00mol/L, the decontamination temperature is 1-40deg.C and continuous time lasts for 0.1-48.0h and the circulation flow rate of the fluid is 0.5-5.00m/s when applying loop circulation method.

The invention relates to a building insulated wall body material and a preparation method of the building insulated wall body material. The preparation method comprises the following steps of: (1) mixing ardealite, red mud, fly ash, cement, yellow sand and lime according to the proportion, and adding a foamer so as to obtain a material which is uniformly mixed; (2) adding water in the material after mixing, performing ball milling, and preparing a slurry;(3) pouring the slurry after ball milling in a mould so as to carry out injection molding; and (4) placing a green body in a maintenance box, maintaining under high temperature and high pressure, and then maintaining under a natural state. Compared with the prior art, the building insulated wall body material and the preparation method have the advantages that the industrial residue, the ardealite and the red mud are sufficiently utilized, the pollution of the ardealite and the red mud to the environment can be reduced, and thus the purpose of recycling resources is achieved. The manufacturing of the building heat insulating material has the advantages of short period, low cost, no radioactive contamination, low density and high strength.

The invention belongs to the technical field of immunoassay and diagnosis and relates to a method for magnetic antibody immunoassay chemiluminescence detection of treponema pallidum antibodies. The method comprises the following steps of: using GoldMag particles as carriers, coating one or more antigens of specific recombinant proteins of treponema pallidum antibodies, TP15, TP17, TP47 and TP44.5, then adding a sample to be detected and enzyme labeled antigens, and finally adding luminescence substrates for luminescence detection. The GoldMag particle surface has a larger coupling capacity to the antigen and has characteristics of high specificity and no pollution of the enzyme linked immunoassay as well as high sensitivity of chemiluminescence, and therefore, the method has the advantages of high detection sensitivity, good specificity, wide linear range, no radioactive pollution and the like.

The embodiment of the invention discloses an emergency environment radiation monitoring system, comprising a mobile environment monitor and a center station emergency environment radiation monitor computer network system. The mobile environment monitor is arranged with an automobile gamma radiation automatic monitor, a globe positioning system GPS, two wireless communication devices which can be switched and a safe and reliable automobile power supplier, to confirm the operation stability and the reliability of real-time monitor and transmission of the system. The center station emergency environment radiation monitor computer network system adopts a digit electronic map technique adopting a geographic information GIS as a software platform, to real-timely display the gamma radiation monitor data and the GPS positioning information of the monitor on the electronic graphic interface of each network monitor station, thereby in-timely and accurately finding wind direction radioactive contamination region for nuclear power station accidents and providing reliable monitor information for emergency commanders, based on the decision of operational intervention level.

The invention provides automatic underwater welding maintenance equipment comprising a spindle. Two air-bag supports are symmetrically arranged at two ends of the spindle and respectively provided with an air bag, a welding space is formed between the air-bag supports, a barrel capable of axially moving is arranged in the welding space, an air inlet pipe and a drainage pipe are arranged on the barrel, the drainage pipe is communicated with the welding space and a drainage space on the outer side of the air-bag supports, and a welding device is arranged in the barrel. Due to the fact that the welding space is isolated through the air bags, and water in the welding space is discharged under the action of the air inlet pipe and the drainage pipe, a partially-dried type working environment is established; welding seams are repaired through the welding device by which affect of a water environment upon operation of parts is effectively avoided, risk of the parts being subjected to radioactive contamination is lowered, and stability of a welding process and repairing quality of the welding seams are guaranteed.

The invention discloses a calcium sulfate-whisker compounded quartz stone board product, which comprises the following materials in parts by weight: 58-75% of particle raw material, 10%-25% of quartz powder, 0.01%-10% of pigment, 0.1%-1% of silane coupling agent, 8%-12% of unsaturated polyester resin, 5%-10% of anhydrous calcium sulfate, and 0.8-2% of curing agent, wherein the particle raw material is one or two selected from quartz particles and glass particles. The product is an environment-friendly novel decoration material which has high property and no radioactive contamination, can be recycled, and has the characteristics of gay colors, high finish degree, uniform color, pressure-resistance and abrasion-resistance, good toughness, compact structure, low water absorption, corrosion-resistance, high strength, impact-resistance, innocuousness and zero radiation, and the like.

The present invention discloses a kit and method for detection of thyroid peroxidase antibody. The kit includes thyroid peroxidase antibody series standards, a magnetic separation reagent of a magnetic particle suspension conjugated with streptavidin and pigment, a first reagent of an antigen solution containing biotin N-hydroxysuccinimide ester labeled thyroid peroxidase antigen, a second reagent of a solution containing alkaline phosphatase labeled mouse-anti-human IgG monoclonal antibody. The kit is used for detection of thyroid peroxidase antibody. By the above-described manner, the invention uses a biotin-streptavidin signal amplification system and alkaline phosphatase labeling to solve the traditional problem of low ELISA sensitivity; the nanometer magnetic particle separation system achieves high sensitivity for radioimmunoassay (RIA), but has no radioactive contamination, and has greatly improved period of validity, security and environmental performance.