1134 results about "Radiation resistant" patented technology

This invention relates to single session image guided all field simultaneous radiation therapy combined with hyperthermia. Hyperthermia renders the radiation resistant cells as more radiation sensitive cells. The high and super-high dose rate radiation greatly improves the RBE of the photon radiation. It also minimizes photon radiation therapy's OER and cell cycle dependent tumor cell kill by minimizing the repair capacity of cell after photon radiation. Single session hyperthermia and radiation therapy overcomes the thermotolerance-associated inefficiency of hyperthermia treatment as it is when hyperthermia is combined with fractionated, lower dose rate radiation. The synergetic effects of sublethal damage repair inhibiting single session hyperthermia-combined with high dose and dose rate single session radiation therapy, and combined chemotherapy brings the photon radiation therapy's tumor cure and control capabilities closer to high LET radiation therapy.

Apparatus and methods to fabricate a radiation hardened optical fiber from a preform are provided. Various parameters affecting the draw process are controlled to optimize the radiation resistance of the resulting fiber. An annealing zone may be provided to allow a drawn fiber exiting a primary hot zone to undergo an annealing process which may increase radiation resistance.

The invention relates to a microminiature operation underwater robot of a nuclear power plant, and the robot comprises an underwater robot body and an onshore control system, wherein two propellers are respectively arranged in the horizontal and vertical directions of the robot body, a depth gauge is arranged on the right side of the front part of the robot body, a manipulator is arranged at the bottom in front of the robot body, and a sonar is arranged on the top of the robot body; a control cabin is arranged in the middle rear part of the robot body; an outer cabin is sealed by a transparent glass cover, and is provided with a rearview camera and an auxiliary lighting light-emitting diode (LED) lamp; a front-view camera system is arranged at the front part of the robot body, and comprises a zooming radiation resistant camera tube, a tripod head and a lighting lamp; a video image and control signal is transmitted to the onshore control system through a shield cable; and the control system comprises a movement control rod, a manipulator control button, a keyboard, a main display screen and a speed governing knob. The microminiature operation underwater robot of the nuclear power plant is used for the monitoring and the simple foreign body fishing of a core pool, a spent fuel pool and a component pool of the nuclear power plant.

An apparatus is disclosed for nonintrusively inspecting an object. The apparatus has a curtain assembly for attenuating scattered x-rays leaving the apparatus. The curtain assembly has a flexible member that forms a closed loop over the first and second horizontally spaced curtain rollers, and a plurality of radiation-resistant curtain members secured to the flexible member. Rotation of the curtain rollers causes movement of the curtain members in an orbital path. The curtain members are folded onto one another when moving in one direction at the top, and are suspended and hang down when they are at the bottom of the orbital path. The apparatus also has a conveyor belt on which objects can be located. The curtain members move at the same speed together with the conveyor belt and the objects located thereon. An advantage of the curtain assembly is that small objects can pass through the curtain assembly without being hindered by the weight of the curtains.

The present invention relates to radiation resistant plasticized polyolefin compositions comprising a polyolefin and a non-functionalized hydrocarbon plasticizer.

The invention discloses wear-resistant, antiknock and radiation-resistant concrete and a preparation method thereof. Each cubic meter of the concrete comprises 600-1600kg of cement, 400-1400kg of fine aggregate, 30-560kg of a high-strength admixture, 250-1800kg of functional aggregate, 3-500kg of high tensile strength fibers, 0.4-45kg of organic fibers, 0.6-43.2kg of a water reducer (based on solid content), 0.06-43kg of an antifoaming agent, 6-129kg of an expanding agent and 100-430kg of water. The wear-resistant, antiknock and radiation-resistant concrete has high wear resistance, instant high temperature explosion resistance, high knock resistance, high toughness and radiation resistance.

The invention discloses a fully distributed fiber Rayleigh and Raman scattering photon strain and temperature sensor, which is a sensor for positioning a measuring point by adopting a fiber Rayleigh and Raman fusion scattering sensing principle and using an optical time-domain reflection principle based on an integrated fiber wavelength division multiplexing technique. The sensor comprises pulsed laser, an integrated fiber wavelength division multiplexer, a sensor fiber, three photoelectric receiving modules, a digital signal processor, a display and an alarm. The sensor can simultaneously measure field deformations, cracks and temperatures without crossing one another. Fiber paved in a site is not electrified, resists electromagnetic interference, and is radiation resistant and corrosion resistant, and the fiber is not only a transmission medium but also a sensing medium. The sensor has the advantages of low cost, long service life, simple structure, good noise-signal ratio and good reliability, and is applicable to monitoring the production process of middle-short distance between 100 meters and 15 kilometers and large scale civil engineering and monitoring hazard forecasts.

The present invention relates generally to radiation-resistant medical devices which contain polymer regions for release of therapeutic agents. The present invention also relates to radiation-resistant copolymer materials for use in connection with insertable or implantable medical devices. The radiation-sterilized medical device comprises (a) a release region and (b) at least one therapeutic agent and the release region comprises a phenoxy resin block.

It has been found that basalt particles, when combined with a resin binder and a reinforcing material, such as fiberglass, provide unexpected strength, fire-resistance, radiation impermeability, and projectile shielding for ballistic armor/shields, fire-resistant building panels, construction blocks and protective coatings on substrates. The armor panels can be worn, as in a bullet-proof vest, or can be used as a shield to protect a vehicle, aircraft or other structures as projectile penetration-resistant and fire and radiation resistant materials.

The invention belongs to the field of new material preparation, resumptively relates to a method for growing a large area of graphene at a low temperature through a chemical vapor deposition (CVD) method by using a polystyrene solid state carbon source. The graphene grown by adopting the method has a smooth and level surface and the layer number of the graphene is controllable. The invention provides the method for preparing a layer-number-controllable graphene thin layer in a low temperature condition by adopting the low-cost solid state carbon source. Compared with a traditional method for preparing the graphene thin layer by adopting a high temperature CVD method, the manufacturing cost of the graphene thin layer is greatly reduced, and the method disclosed by the invention has enormous application potential in the aspects of high temperature, high frequency, large power, photoelectron, radiation-resistant electronic devices and the like.

The invention discloses a radiation-resistant halogen-free low smoke flame retardant insulating material for cables of nuclear power plants and a preparation method. The radiation-resistant halogen-free low smoke flame retardant insulating material is prepared from the following raw materials: ethylene propylene diene rubber, phenyl siloxane rubber, magnesium hydrate, aluminium hydroxide, zinc borate, white carbon black, cerium dioxide, zinc oxide, Bis(tert-butyldioxyisopropyl)benzene, tri allyl cyanurate, 2-mercaptobenzimidazole, 2,2,4-trimethyl-1,2-dihydroquinoline, Aflux A-25, stearic acid, vinyl tris(beta-methoxyethoxy) silane, and paraffin oil by heating and mixing. The formulation and the mixture ratio are scientific and reasonable, and the process is advanced. The prepared insulating material has good radiation resistance, excellent mechanical property, good electrical property and long service life, and is a good radiation-resistant halogen-free low smoke flame retardant insulating material for manufacturing the cables of the nuclear power plants.

The invention relates to radiation-resistant concrete based on environment protection type functional aggregates and a preparation method thereof. The radiation-resistant concrete based on environment protection type functional aggregates is characterized in that the radiation-resistant concrete consists of water, gel materials, fine aggregates, coarse aggregates, water reducing agents and fiber,wherein the gel materials consist of cement and mineral admixture, and the fiber consists of steel fiber and lead boron polyethylene fiber, wherein each ingredient has the following mixture ratio: 140 to 160 kg/m<3> of water, 200 to 400 kg/m<3> of cement, 100 to 200 kg/m<3> of mineral admixture, 1000 to 2000 kg/m<3> of fine aggregates and 1500 to 2500 kg/m<3> of coarse aggregates. The mass dopingamount of the water reducing agents accounts for 0.6 to 1.0 percent of the total mass of the gel materials, the volume doping amount of the steel fiber accounts for 0.5 to 1.5 percent of the total volume of the gel materials, and the volume doping amount of the lead boron polyethylene fiber accounts for 0.8 to 1.2 percent of the total volume of the gel materials. The invention has the advantages of environment-friendly effect and low cost. The obtained radiation-resistant concrete has good ray shielding effect, good work performance, good crack resistance performance and good durability performance.

The invention discloses a cold-heat circulation aging treatment method for increasing magnetic stability of permanent magnets. The method comprises the following steps of: putting one or more permanent magnets magnetized in a saturated manner on a non-magnetic bottom plate; then putting in a high-low temperature chamber, and freezing at minus 70 DEG C to minus 20 DEG C for 30-120 min; then, heating the high-low temperature chamber to 60-250 DEG C at the temperature increasing rate of 1-10 DEG C/min, and keeping the temperature for 30-240 min; and finally, naturally cooling to room temperature, and completing cold-heat circulation aging treatment. By adopting the method disclosed by the invention, total loss, irreversible loss, reversible loss and reversible temperature coefficients when temperature of the permanent magnets is changed can be effectively eliminated or reduced; and heat stability, time stability, magnetic stability and radiation-resistant magnetic stability of the permanent magnets under a vibration condition can be increased.

The invention relates to aqueous radiation-resistant coating belonging to the chemical engineering technology field. The aqueous radiation-resistant coating takes flaky graphite powder, acetylene carbon power, carbonyl iron powder and ferrite power as main materials with electromagnetic wave absorption function and takes diffusant, cement, film forming agent, ammonia and pure water as auxiliary materials. The aqueous radiation-resistant coating has the electromagnetic wave absorption frequency of 1.0-20000 MHz, can attenuate the electromagnetic wave absorption by 2-20 dB according to the different coating thickness, can solve the unsolvable problem of purifying environment polluted with electromagnetic radiation by shielding material and effectively prevent the harm of electromagnetic radiation to surrounding equipment and personnel.

The invention relates to the nanometer plate surface glue equipment and the cloth glue that comprises the working platform, cloth hopper distributing nanometer fluid on the compound extractor, vibrating device connected with the cloth hopper, cloth applying device setting the glass fiber net on the nanometer glue band, and the scraping device and compression device. The compound extraction band moving horizontally on the working platform and forming nanometer band, setting glass fiber net cloth with tension on the nanometer band, compressing the glass fiber net cloth and the nanometer band into nanometer compound band, compressing the compound band tightly. It is heat and sound insulation, radiation resistant, and improved in product feature and reduced in production cost.

The invention relates to a semiconductive silicon rubber shielding material for a radiation-resistant cable, and a preparation method of the material, belonging to the technical field of cable shielding material. The semiconductive silicon rubber shielding material comprises the raw material components in parts by weight: 100 parts of silicon rubber, 20-40 parts of conductive carbon black, 40-50 parts of white carbon black, 1.0-2.5 parts of dicumyl peroxide, 2.0-3.0 parts of auxiliary vulcanizing agent, 5-15 parts of diphenyl silanediol, 1.0-2.0 parts of stearic acid, 4-6 parts of zinc oxide and 2-5 parts of ferric oxide, wherein the silicon rubber is phenyl ether supporting silicone rubber or phenylene silicone rubber; and the auxiliary vulcanizing agent is triene propyl cyanurate. The silicon rubber shielding material is good in radiation-resistant performance, and can give play to the specified function for a long time on radiation occasion when being used as a shielding layer of an electric wire and the cable.

The invention provides a high-temperature-resistant epoxy resin-based neutron and gamma-ray shielding composite material and a preparation method thereof. The high-temperature-resistant epoxy resin-based neutron and gamma-ray shielding composite material is prepared from, by weight, 50-100 parts of epoxy resin, 10-100 parts of curing agent, 100-800 parts of radiation-resistant functional auxiliary, 5-100 parts of fiber reinforced material, 10-150 parts of flame retardant functional filler and 1-50 parts of processing aid. The high-temperature-resistant epoxy resin-based neutron and gamma-ray shielding composite material has excellent neutron and gamma-ray shielding performance, dimensional stability and flame retardation and keeps stable neutron and gamma-ray shielding performance when working within 120-200 DEG C for a long time.

The invention discloses an aldehyde/benzene-removing radiation-resistant inner wall putty powder which is composed of the following raw materials in parts by weight: 14-18 parts of ground calcium carbonate. 8-12 parts of talcum powder, 10-14 parts of white cement, 4-6 parts of gypsum powder, 6-8 parts of meerschaum powder, 5-7 parts of bamboo charcoal powder, 3-5 parts of nano porous silicon dioxide, 1-2 parts of zinc oxide micropowder, 4-6 parts of conductive powder, 4-6 parts of lignocellulose, 2-3 parts of alpha-starch, 0.5-1.5 parts of inorganic antimicrobial powder, 3-5 parts of thickening agent, 7-9 parts of binding agent, 2-3 parts of fiber, 0.7-0.9 part of dispersing agent, 0.6-0.8 part of defoamer, 2-3 parts of ethylene glycol and 20-30 parts of water. The putty powder disclosed by the invention not only has the conventional properties of the common putty powder, but also has the functions of aldehyde/benzene removal and radiation resistance.

An electric wire and cable according to the present invention comprises a sheath made of a radiation-resistant non-halogen flame-retardant resin composition in which the radiation-resistant non-halogen flame-retardant resin composition includes one to 30 parts by weight of aromatic amine antioxidant with a melting point of 40° C. or higher and 50 to 300 parts by weight of metal hydroxide blended into 100 parts by weight of ethylene polymer.

Methods and apparatus are provided for reducing the overall radiation hardness of a semiconductor chip. A radiation detector and a failure memory are provided. A disable signal or signals is produced by the failure memory. The disable signal is a required input to a user logic function, such as an off chip driver, an off chip receiver, a clock, or a static random access memory. When the radiation detector detects radiation, that detection is stored in the failure memory. The disable signal, when active, causes some or all of the user function to be inoperative. This invention is particularly important when the semiconductor chip is produced in a silicon on insulator (SOI) Complementary Metal Oxide Semiconductor (CMOS) process, which is naturally radiation resistant.

The invention discloses a radiation resistant tea which mainly comprises the following components (by weight portion): green tea 180-220 parts, chrysanthemum flower 10-20 parts, acanthopanax root 10-20 parts, sea-buckthorn 10-20 parts and ganoderma lucidum 10-20 parts. The tea contains rich amino acids, linolic acid, vitamin A, B, C, E, beta-carotene, and microelements including selenium, manganese, zinc and ferrum.