239 results about "Radiation resistant" patented technology

The invention discloses a radiation-resistant all-digital high-frequency low-level control system which is characterized in that the system can be arranged on an accelerator site with strong radiation and is used for solving the problem that signals are interfered due to the fact that the signal transmission distance is too long. According to the system, the functions of all peripheral chips which cannot work normally due to strong radiation on the accelerator site are included in the radiation-resistant FPGA chip, and the functions of all the external chips and the original functions of the radiation-resistant FPGA chip are achieved through the radiation-resistant FPGA chip. The system is realized by using a single radiation-resistant FPGA chip, a high-frequency digital control algorithm is realized through firmware program design of the radiation-resistant FPGA chip, the control function of a high-frequency low-level control system is met, and the radiation-resistant problem of the whole system is directly solved. The system can be placed on the site of an accelerator, breaks through the limitation that a transmission cable needs to penetrate through a wall, is closer to a controlled object, and does not need a radio frequency cable to penetrate through a pipeline in the wall.

The invention relates to the technical field of image processing, and discloses a plastic package material defect detection method and system in a radiation environment based on machine vision. The method comprises the following steps: acquiring an anti-radiation image in a gamma-ray environment through a lead-tungsten alloy shielding high-radiation tolerance type image sensor, and performing adaptive contrast enhancement. Defect features including microcracks, bubbles, deformation and chromatic aberration are extracted by using dual-tree complex wavelet transform and an HSV color space; and inputting the multi-dimensional features into an AR-DCNN network to carry out multi-task learning, identifying defect types and carrying out scoring. Based on Weibull distribution and a random forest algorithm, the radiation-resistant life of the plastic package material is predicted, and a material degradation curve and safety threshold early warning are obtained. According to the invention, standardized processing of the radiation damage quantitative index is realized, and the prediction accuracy is effectively improved.

A portable small protective workstation for alpha nuclide operation comprises a protective cabin, a transparent window and glove holes are formed in the front side face of the protective cabin, radiation-resistant operating gloves are embedded in the glove holes in a sealed mode, a tray inlet is formed in the side face of the protective cabin, and a drawer type bracket is connected to the tray inlet in a sliding mode. The drawer type bracket comprises a tray layer, a cushion layer and a cover plate, the tray layer and the cushion layer are both vertically and fixedly connected to the side face of the cover plate, the tray layer is located above the cushion layer, a high-adsorbability radioactive water absorption pad is fixedly installed on the cushion layer, a plurality of through holes are formed in the bottom face of the tray layer, and the tray layer and the cushion layer are movably installed in the protection cabin body through a tray inlet. The cover plate abuts against the outer side face of the protection cabin in a sealed mode. An air filter box is arranged above the protective cabin body, and a filter layer is arranged in the air filter box. According to the utility model, the defects in the prior art are overcome, and the organic unification of radiation protection, pollution control and experiment convenience for operators is realized.

The invention discloses a radiation-resistant protective cable for a nuclear power station and a preparation method thereof, and belongs to the technical field of cables, the radiation-resistant protective cable for the nuclear power station comprises a cable body and a sheath layer, and the sheath layer comprises the following components in parts by mass: 100 parts of polypropylene resin, 20-40 parts of ethylene propylene diene monomer and 5-12 parts of modified multi-walled carbon nanotubes. 8-15 parts of a heat conduction enhancer, 2-6 parts of an antioxidant, 1-3 parts of a heat stabilizer and 4-8 parts of a plasticizer; the heat conduction reinforcing agent is prepared by carrying out surface modification on composite powder of aluminum nitride and boron nitride through a silane coupling agent. Through the synergistic effect of the modified multi-walled carbon nanotubes and the surface modified heat-conducting enhancer, the heat-conducting property, radiation resistance and heat stability of the cable are remarkably improved on the premise of keeping excellent electrical insulation property.

The invention provides a peroxide crosslinked polyethylene pipe as well as a preparation method and a preparation system thereof, and belongs to the technical field of polyethylene pipes. According to the peroxide crosslinked polyethylene pipe disclosed by the invention, the high-density polyethylene and the ultra-low-density polyethylene are adopted, and the antioxidant and the lubricant are combined, so that the heat resistance, the flexibility, the creep resistance, the environmental stress cracking resistance, the radiation resistance and the oxidation resistance of the peroxide crosslinked polyethylene pipe are improved; meanwhile, a polymer containing boric acid ester bonds is added into the assistant crosslinking agent, so that the crosslinking uniformity, radiation resistance, heat resistance, durability, aging resistance and mechanical properties of the peroxide polyethylene pipe are improved.

The invention relates to the technical field of static storage, and particularly discloses an anti-radiation SRAM (Static Random Access Memory) unit, array and storage and calculation integrated system, which realizes the balance of anti-radiation capability and engineering feasibility through the collaborative design of a circuit and the system. A polarity-reinforced RHCIM-16T unit structure is adopted as the core, and directional conductive constraint is introduced, so that complex multi-node flipping is simplified into a single'lock 0 'error, and the error rate is reduced from the source. On the basis, a lightweight single error correction code is combined to form an efficient fault-tolerant mechanism of circuit simplification and SEC coding. According to the scheme, through the design of splitting word lines and the like, logic operations such as AND and NOR are compatible, and stable execution of the storage and calculation integrated function in a radiation environment is ensured. Simulation and experiment results show that the robustness and the expandability of the memory array in the radiation environment can be remarkably enhanced while the relatively low area and the relatively low power consumption overhead are maintained.

The utility model discloses an anti-radiation high and low temperature vacuum motor, and particularly relates to the field of high and low temperature vacuum motors, the anti-radiation high and low temperature vacuum motor comprises a high and low temperature vacuum motor shell, a stator, a rotor and a rotating shaft, the stator is installed on the side wall of the inner cavity of the high and low temperature vacuum motor shell, and the rotating shaft is transversely arranged at the center of the inner cavity of the high and low temperature vacuum motor shell. A rotor is arranged on the outer diameter surface of the rotating shaft, a bearing is arranged on the contact face of the rotating shaft and the high-low temperature vacuum motor shell, and a sealing assembly is arranged on one side of the bearing. A high-low temperature vacuum motor is generally applied to fields with extremely strict environmental requirements, such as space flight and aviation and nuclear industry. Through the radiation-resistant ceramic layer, the lead-boron polyethylene plate, the nickel-based alloy layer and the modified phenolic aldehyde amine epoxy anticorrosive coating in the radiation-resistant layer in the high-low temperature vacuum motor shell, the effects of preventing the internal structure of the motor from being damaged and preventing the performance from being reduced and even losing efficacy are achieved, and through the structure, high-energy particles and radiation are prevented from penetrating through the motor shell to damage the interior of the motor. And the effect of preventing radiation is effectively achieved.

The invention relates to the technical field of photovoltaic adhesive films, and discloses an anti-radiation photovoltaic packaging adhesive film, a preparation method thereof and a photovoltaic module. The adhesive film is of a multi-layer co-extrusion composite structure formed by co-extrusion molding and irradiation, and comprises an upper surface layer, a middle functional layer and a lower surface layer, the upper surface layer is a radiation-resistant polymer matrix (such as EVA-g-St, EVA-g-(alpha-MeSt), POE-g-St and an EVA / POE-aromatic resin blend); the middle functional layer comprises a packaging resin matrix, an anti-radiation agent (which is a nano-scale radiation protection material such as a rare earth oxide, a heavy metal oxide, a boron-containing compound and a polymer derivative of a benzotriazole type ultraviolet absorbent) and a stabilizer; and the lower surface layer is a bonding surface layer formed by light-transmitting bonding resin. The adhesive film is good in radiation resistance, the light transmittance, the cohesiveness, the elongation at break retention rate, the yellowing resistance, the power attenuation resistance of a component and the like after accelerated radiation are obviously improved, and the service life of the component under strong radiation can be prolonged.

The invention discloses an electromagnetic shielding foam material and a preparation forming method thereof, and relates to the technical field of polymer processing. The electromagnetic shielding foam material is prepared by adopting polyphenylene sulfide as a raw material, so that the mechanical strength of the electromagnetic shielding foam material is high, and PPS has excellent mechanical strength, tensile strength, bending strength and other indexes which are at a relatively high level in engineering plastics, and can bear relatively high pressure and wear; the melting point of the PPS exceeds 280 DEG C, the heat distortion temperature exceeds 260 DEG C, the PPS can resist the high temperature of 260 DEG C in a short term, the long-term use temperature can reach 200-220 DEG C, and the PPS still can keep good performance at the high temperature; the PPS has excellent electrical insulation property, low dielectric constant and dielectric loss angle tangent value and good arc resistance, and is suitable for insulating materials in the field of electronic and electric appliances; excellent chemical corrosion resistance and radiation resistance are realized; the PPS electromagnetic shielding foam material prepared by a special process also has a good electromagnetic shielding effect, and can be used in occasions requiring electromagnetic shielding.

The invention provides a plastic film for packaging a medical non-woven fabric and a preparation method of the plastic film. The plastic film comprises a polyimide layer, an ethylene-vinyl alcohol copolymer layer and a polypropylene layer from outside to inside, the polyimide layer is prepared from the following raw materials: 4, 4-diaminodiphenyl ether, pyromellitic dianhydride, a polyimide coated nano titanium dioxide / tetrapod-like zinc oxide whisker composite material and modified diatomite; the polyimide layer in the plastic film has excellent steam sterilization resistance and good radiation resistance, and after the polyimide layer is matched with the ethylene-vinyl alcohol copolymer layer and the polypropylene layer, the plastic film not only has excellent gas and microorganism barrier properties, but also can adapt to the modes of high-temperature steam sterilization, gamma ray irradiation sterilization and the like; the high mechanical property is kept for a long time, and the risk of damage caused by external force is reduced.

The invention relates to the technical field of coatings and provides a fireproof coating for a radiation control area as well as a preparation method and application of the fireproof coating. The fireproof coating for the radiation control area comprises the following components in parts by weight: 40-50 parts of epoxy resin, 12-18 parts of a curing agent, 5-10 parts of filler, 8-16 parts of a flame retardant, 0.1-1 part of a dispersing agent, 0.1-1 part of a defoaming agent, 1-5 parts of carboxyl-terminated hyperbranched polyester and 1-5 parts of polyetherimide. According to the technical scheme, the problems of relatively low bonding strength and relatively poor radiation resistance of fireproof coatings in related technologies are solved.

The invention belongs to the field of organic silicon materials, and particularly relates to carborane modified heat-resistant silicone oil and a preparation method thereof. The carborane modified heat-resistant silicone oil is prepared by introducing a molecular chain containing a benzene ring and carborane structure into a side chain of the silicone oil, and the heat resistance and radiation resistance of the hydrogen-containing silicone oil are remarkably improved by utilizing the synergistic effect of a cage structure of the benzene ring and carborane; the modified silicone oil can still keep good physical and chemical properties in high-temperature and radiation environments, the application range of the modified silicone oil in the high-temperature and radiation fields is expanded, the modified silicone oil rubber material containing a carborane structure can be further processed to be used in a thermal protection system of an aircraft, and the situation that the aircraft is prone to falling off in the high-speed flight process is prevented. And the material embrittlement and cracking are caused by violent friction between the surface of the aircraft body and air, so that the structural integrity of the aircraft is effectively protected.

The invention discloses a total dose radiation resistant triode and a preparation method thereof, and belongs to the technical field of radiation hardening of bipolar devices. According to the preparation method of the total dose radiation resistant triode provided by the invention, an STI (shallow trench isolation) structure above the interface of the base well region and the emitter well region is eliminated and replaced by an oxide layer and polycrystalline silicon double-layer protection structure. As the thickness of the oxide layer is far smaller than that of the STI shallow trench isolation structure, under the same total dose irradiation, the number of oxide layer fixed charges and interface states generated by the oxide layer is greatly reduced, the excess base current of the triode can be effectively reduced, the degree of current gain damage is reduced, and the total dose irradiation resistance of the triode is improved.

Apparatuses, systems, and methods for dual processor single board computers are provided. For example, a dual processor single board computer may include a management processor with associated memory, an application co-processor with associated memory, and a plurality of bus switches. The dual processor single board computer may be used in devices that may be exposed to radiation, such as satellites. During a radiation event, the management processor may continue operation and isolate the application co-processor and certain memories to cease operation to increase the amount of radiation safely received before damage. After the radiation event, the management processor may reboot the application co-processor, and update applications to allow a device to continue its mission.

The invention relates to glass for a liquid flash capillary array as well as a preparation method and application of the glass. The glass comprises the following components by mole percent: 80-85% of SiO2; 0.5% to 4% of Al2O3; 4.5 to 8% of B2O3; the sum of the contents of K2O and Na2O is 2-8%; the sum of the PbO content and the CdO content is 1-2%; 1.5%-4% of ZrO2; the sum of the contents of the KFH2 and the K2SiF6 is 1 to 4 percent; 0.2% to 0.5% of BaF2; and 0.5%-1% of CeO2. The technical problem to be solved is how to provide glass with low refractive index, high softening point, good devitrification resistance, good pressure resistance and radiation resistance, so that the glass can be used for preparing the liquid flash capillary tube array.

The composite material is mainly applied to protection and improvement of electronic devices in a high-temperature environment. (1) a polyimide film layer; because the polyimide film has excellent ductility, high and low temperature resistance, electrical insulation, cohesiveness, radiation resistance and medium resistance, the polyimide film can be used for a long time in a temperature range of-269 DEG C to 280 DEG C, and can reach a high temperature of 400 DEG C in a short time. The polyimide film has excellent high-voltage-resistant insulativity, and the highest withstand voltage of the film with the thickness of 0.1 mm is larger than or equal to 12 kv. The polyimide film can be bent and extended in various ways according to use scenes, and has no influence on material performance (2) the lowest density of the polyimide foam can reach 5.4 kg per cubic meter, and the density is far lower than that of other common materials. The high-toughness high-temperature-resistant steel not only can bear the long-term working temperature as high as 350 DEG C, but also can keep excellent toughness in an environment as low as-269 DEG C. Zero VOC and flame retardance are achieved, and good environment friendliness and chemical stability are achieved. After the two materials are compounded and combined, better heat insulation and temperature resistance can be achieved in the using process, meanwhile, due to the low density of the polyimide foam, better shaping can be achieved after the insulating paint is combined and cured, and better heat conduction and heat dissipation can be achieved on the surface.

The environment-friendly nuclear power high-voltage power cable comprises a cable body, and the cable body comprises a conductor, a semi-conductive shielding layer, an insulating layer, a filling layer, a belting layer, a waterproof layer, an armor layer and an outer protective layer from inside to outside in sequence; the semi-conductive shielding layer is made of a low-smoke halogen-free cross-linked polyolefin semi-conductive material; the insulating layer is made of a radiation-resistant low-smoke halogen-free cross-linked polyolefin composite material; the filling layer is a low-smoke halogen-free polypropylene filling rope; the belting layer is made of a low-smoke halogen-free polypropylene and water-based butyl rubber composite material; the semi-conductive shielding layer tightly wraps the outer side of the conductor, the semi-conductive shielding layer is made of a low-smoke halogen-free cross-linked polyolefin semi-conductive material, is used for uniformizing an electric field on the surface of the conductive wire core and preventing point discharge, and is firmly bonded with the adjacent insulating layer, and the insulating layer is made of a radiation-resistant low-smoke halogen-free cross-linked polyolefin composite material, so that the radiation-resistant low-smoke halogen-free cross-linked polyolefin semi-conductive material has good radiation resistance. And the arrangement of the filling layer, the belting layer and the outer sheath layer improves the comprehensive performance of the cable body and meets the halogen-free, low-smoke, low-toxicity and environment-friendly requirements of the cable.

The invention relates to the field of nuclear cable manufacturing, in particular to a radiation-resistant cable for a nuclear power platform and a preparation method of the radiation-resistant cable. According to the nuclear cable, the five-layer structural design of conductor-insulation-shielding-polyimide film-sheath is adopted, the overlapping wrapping technology of the polyimide film is combined, and the comprehensive performance of the cable in the extreme environment of a nuclear power platform is comprehensively improved. The low-smoke halogen-free flame-retardant ethylene-propylene rubber is adopted as an insulating material, and through the cooperation of an EPDM / POE blending system and the ternary composite flame retardant, the insulating property is stable under the condition of ensuring radiation, and the flame retardant property is excellent. The sheath material is added with the intumescent flame retardant and the polysilazane modifier, so that the cable has no crack at the low temperature of-40 DEG C, the bending radius can be controlled to be less than 5 times of the outer diameter, and the cable is adaptive to the layout of a narrow cabin. Through the synergistic effect of material innovation and structural design, the balance of flame retardant property, mechanical property, radiation resistance, low temperature resistance, aging resistance and small-space applicability of the nuclear cable is realized.

The utility model discloses a kind of irradiation resistance underwater light supplementing lamps, belong to underwater light supplementing lamp technical field, solve the irradiation range of the underwater light supplementing lamp of multiple lamp body becomes larger, but condensing effect is obviously worse, so cannot condensing clear irradiation certain object, affect the visibility when actual underwater operation problem. Including circular arc lamp panel, the lamp body of several fixed connections in lamp panel, and the light-reflecting plate of the rotation connection in lamp panel outer circle, several light-reflecting plate can be relative lamp panel flip, several light-reflecting plate synchronous rotation setting. The utility model uses, when needing large range illumination, traction electromagnet pulls connection rope, makes light-reflecting plate deflect, torsional spring accumulates elastic potential energy, turns wire pole and prevents connection rope scratch breakage. When needing condensing irradiation, traction electromagnet is powered off, release connection rope, torsional spring releases potential energy and drives light-reflecting plate reverse deflection, forms spotlight cover, makes light concentration, clear irradiation object, does not affect underwater operation visibility.

The invention relates to the technical field of thermal control coatings, in particular to a liquid metal commercial aerospace thermal control coating adaptive to extreme temperature difference, which comprises a substrate binding layer and a thermal control functional layer, the thermal control functional layer is arranged on the side wall of the substrate binding layer, a thermal circulation pipe is arranged in the thermal control functional layer, and a composite heat conduction layer is arranged on the side wall of the thermal control functional layer. A limiting stabilizing layer is arranged on the side wall of the composite heat-conducting layer. By arranging the multi-layer composite structure and the liquid metal, efficient heat regulation and control in an extreme temperature difference environment are achieved, the substrate combination layer is made of a radiation-resistant material, it is ensured that the structure stability is kept in a strong radiation environment, the liquid metal material in the heat control function layer and a cross circulation plate form a three-dimensional heat conduction network through a disc-shaped heat control circulation pipe, and the heat conduction efficiency is improved. And by arranging the separation cavity, atomic oxygen erosion is effectively blocked, and the inorganic thermal control coating layer of the separation cavity can adjust the surface thermal radiation characteristic.

The invention provides a TPE blood bag membrane material and a preparation method thereof, and solves the technical problems that an existing PVC blood bag membrane material is not environmentally friendly, not resistant to radiation and sterilization, poor in air permeability and the like. The TPE blood bag membrane material is prepared from the following raw materials in percentage by mass: 20 to 50 percent of SEBS, 5 to 20 percent of plasticizer, 30 to 60 percent of POE and 5 to 20 percent of EVA, the preparation method of the TPE blood bag membrane material comprises the following steps: S1, weighing the raw material components in percentage by weight; s2, fully and uniformly mixing the raw material components weighed in the step S1 to obtain a mixture; s3, carrying out melt extrusion and granulation on the mixture weighed in the step S2 through a twin-screw extruder; the method can be widely applied to the technical fields of polymer materials and medical application.

An alternating current to direct current (AC to DC) power converter assembly that converts a plurality of low voltage alternating current (AC) inputs into a high voltage DC power output. The converter includes two or more AC to DC power converters, each of the two or more AC to DC power converters including: a low power AC power input configured to receive an AC input from a low power AC power source; and a low power DC power output. The converter also includes two or more isolated DC to DC power converters, each DC to DC power converter electrically coupled at least one of the AC to DC power converters, wherein each DC to DC power converter includes an output and wherein each of the DC to DC power converters are connected in series to produce the high power DC power output.

The invention relates to the technical field of cables, in particular to a self-checking acid and alkali resistant nuclear cable which comprises conductors, double-layer insulation, a polyimide tape layer, a filling layer, a waterproof inner sheath and an outer sheath. The waterproof inner sheath and the waterproof outer sheath are made of acid and alkali resistant fluororubber materials, and can cope with long-term soaking of strong acid and alkali solutions under extreme accidents of a nuclear power station; through the combined design of double-layer insulation and the polyimide tape layer, the radiation resistance, high temperature resistance and flame retardance of the cable are improved, and the special working condition requirements of the nuclear power station are met; through the synergistic effect of the built-in diversion monitoring pipe, the external diversion monitoring pipe and the magnetic control reciprocating diversion pump, in cooperation with the temperature and humidity sensor and the pressure sensor, temperature, humidity and pressure state parameters in the cable can be monitored in real time, so that the running state of the cable is judged, the internal heat dissipation effect of the cable is enhanced, and when the parameters exceed a preset threshold value, the cable is protected. Early warning signals can be sent to an external monitoring terminal in time, so that workers can check hidden dangers in time, and the maintenance cost is reduced.

This invention relates to the field of neutron dose monitoring, specifically to a method and apparatus for monitoring the dose equivalent around neutrons over a wide energy range. The apparatus includes an outer moderator, a thermal neutron absorbing layer, a high-energy neutron compensation layer, and an inner moderator. The high-energy neutron compensation layer is composed of a heavy metal material capable of undergoing a significant neutron multiplication reaction with ultra-high-energy neutrons. The thermal neutron detector is a radiation-resistant solid-state semiconductor detector, comprising a silicon carbide semiconductor substrate and an enrichment layer closely adhering to its surface. 6 The device is equipped with a lithium fluoride thermal neutron converter; an initial thermal neutron detector group is deployed within the device to collect thermal neutron fluence information under different slowing degrees; based on the initial thermal neutron detector group, position optimization and weight coefficient output are performed, and multiple groups of thermal neutron detectors in the first depth order are selected to make the total dose response flat in a wide energy range for dose equivalent monitoring.

A vacuum adiabatic body according to the present embodiment can include a first plate, a second plate, a seal configured to seal the first plate and the second plate to provide a vacuum space, and a support configured to maintain the vacuum space. Optionally, the support can include a first support having a first support plate formed in a mesh shape; and a plurality of spacer coupling portions protruding from the first support plate. Optionally, the support can include a second support having a second support plate formed in a mesh shape; and a plurality of spacers protruding from the second support plate and coupled with each of the plurality of spacer coupling portions to form a plurality of bars together with the plurality of spacer coupling portions. Optionally, the support can include a radiation resistant sheet supported by a portion of the plurality of bars and spaced apart from at least one of the first support plate and the second support plate. Alternatively, each of the support plates can include a plurality of through-holes. Optionally, a distribution structure produced after injection molding of the first support and the second support can be disposed in some of the plurality of through-holes.

The utility model belongs to the technical field of power cables, and particularly relates to an IE-grade K3-class radiation-resistant power cable, which comprises a protective sleeve, ventilation and heat dissipation ports arranged at equal intervals are arranged on the outer surface of the protective sleeve, a connecting sleeve is arranged in the protective sleeve, a power cable is arranged on the inner wall of the connecting sleeve, and two groups of support rings are fixedly connected to the outer surface of the connecting sleeve. The side faces, close to each other, of each set of supporting rings are fixedly connected with supporting plates arranged at equal intervals, the side face, away from the connecting sleeve, of each supporting plate is fixedly connected with two sets of telescopic springs, and the ends, away from each other, of each set of telescopic springs are fixedly connected with connecting plates. Particularly, an elastic buffering system composed of a supporting ring, a supporting plate, a telescopic spring and a connecting plate can convert mechanical impact into spring deformation energy, the external force resisting performance is greatly improved, and meanwhile an efficient heat dissipation path can be formed by matching equidistant ventilation heat dissipation openings in the surface of the protective sleeve with an air channel between the protective sleeve and a connecting sleeve.

The application relates to a preparation method of a radiation-resistant PVC resin and belongs to the technical field of grafted polymer compositions. The existing radiation-resistant modification method of the PVC resin has low radiation-resistant modification effect or seriously affects the mechanical properties of the PVC resin. The method is as follows: 1) uniformly dispersing an initiator, a dispersing agent, a radiation-resistant agent and a chain transfer agent in water; 2) vacuumizing and adding a vinyl chloride monomer, uniformly stirring at normal temperature and heating and reacting; 3) uniformly stirring after adding a terminating agent and drying to obtain the PVC resin; wherein the radiation-resistant agent in the step 1) is a solution of p-methoxy cinnamoyloxy propyl trimethoxysilane and 4-methyl-acrylate-2-hydroxy benzophenone in any proportion. The radiation-resistant component is combined into the PVC resin particles, and the radiation-resistant capacity is improved from the essence of the particles. The selected specific radiation-resistant agent component can be well combined with the PVC resin, and does not affect or even improves the mechanical properties.

The invention discloses a radiation-resistant antifouling paint and a preparation method thereof. The radiation-resistant antifouling paint comprises the following components in percentage by mass: 20-30% of radiation-resistant antifouling resin; 4-10% of a dissolution auxiliary agent; 10-20% of a radiation-resistant filler; 30-50% of an antifouling agent; 0.5%-2% of a surfactant; 0.5-2% of an anti-settling auxiliary agent; and 5-15% of a solvent. According to the radiation-resistant antifouling coating disclosed by the invention, through a benzene ring structure in a resin structure and a shielding effect of mica and flake graphite powder in the coating, the risk of paint film pulverization, cracking and failure caused by radiation can be effectively avoided, and under the stable hydrolysis effect of the main chain degradation type polysilane methacrylate self-polishing resin in seawater, the radiation-resistant antifouling coating has the advantages of good anti-fouling effect and good anti-fouling effect. The antifouling agent can be released continuously and stably, long-term antifouling performance is achieved, and normal operation of underwater equipment and ships is guaranteed.

The invention belongs to the technical field of high polymer materials, and particularly relates to a radiation-resistant halogen-free flame-retardant cable material for a nuclear power station cable and a preparation method thereof. The cable material is prepared from the following components in parts by mass: 50 parts of ethylene-vinyl acetate copolymer, 20 parts of ethylene propylene diene monomer, 20 parts of ethylene-octylene copolymer, 10 parts of maleic anhydride grafted ethylene-octylene copolymer, 3 to 6 parts of silicone master batch, 180 to 220 parts of active magnesium hydroxide, 40 to 60 parts of bismuth hydroxide, 10 to 20 parts of flame-retardant synergist, 3 to 6 parts of main antioxidant and 1 to 3 parts of auxiliary antioxidant. 2 to 4 parts of TAIC (triallyl isocyanurate) and 3 to 6 parts of octaphenylcyclotetrasiloxane; the cable material has excellent radiation-resistant stability, halogen-free environment-friendly flame retardance, balanced mechanical properties and long-term thermal stability, the preparation process is simple, and the cost is controllable.

The invention relates to the technical field of nuclear energy fuel cladding materials, in particular to a nuclear high-temperature-resistant and radiation-resistant ODS ferrite alloy and a preparation method of a pipe of the nuclear high-temperature-resistant and radiation-resistant ODS ferrite alloy. The ODS ferrite alloy comprises the following components in percentage by mass: 11.0 to 15.0 percent of Cr, 1.0 to 3.0 percent of W, 0.1 to 1.0 percent of Mn, 0.0 to 0.6 percent of Ta, 0.2 to 0.6 percent of Ti, 0.15 to 0.5 percent of Y, 0.11 to 0.26 percent of O and Clt, 0.1%, Zirt; %, 0.01%, Allt; the mass ratio of Y to Ti is equal to 0.4-1.0, and the pipe is prepared by adopting the processes of hot forging, low-temperature quick forging and room-temperature rolling. The ODS ferrite alloy and the pipe thereof provided by the invention have a microstructure with fine grains and uniformly distributed nano oxides, the alloy and the pipe have excellent high-temperature mechanical properties, the quality of the inner surface and the outer surface of the pipe is good, and the linear precision is high.