Track for inclined elevator of nuclear reactor

FIELD: transportation.

SUBSTANCE: claimed track for an inclined elevator of a nuclear reactor is made with alternating straight and curved areas, wherein the initial and the final areas are made rectilinear and arranged at the same angle of inclination α to the horizon plane.

EFFECT: possibility of reducing the presence time of the SFA truck in gaseous atmosphere due to reducing the track length, and increasing the safety of transporting spent fuel assemblies by the inclined lift of a nuclear reactor.

2 cl, 1 dwg

 



 

Same patents:

FIELD: agriculture.

SUBSTANCE: invention relates to means of deactivation of soils contaminated with radionuclides. The declared method of deactivation of the territory comprises filling it with clean soil, and the clean soil is produced directly on the deactivated territory using airlifts.

EFFECT: elimination of the need of excavation works in remote territories and improving the quality of deactivation.

1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to device designed to remove MOX-fuel sediment from electrolytic cell cathode and can be used in radiochemical production for fabrication of mixed uranium-plutonium fuel (MOX-fuel) suitable for fuel elements of nuclear power station fast reactors. Proposed device comprises support plate with portable cylindrical container arranged at its centre. Guide cores are fitted outside said container while MOX-fuel sediment destructors are arranged in opposition at support plate edges. Feeders of liquid nitrogen or its vapour jets to said container are arranged perpendicular thereto. Note here that said container is equipped with two-flap bottom and liquid nitrogen or its vapour jets intake pipes. Every said feeder is composed by casing furnished with nozzles and communicated with liquid nitrogen source.

EFFECT: higher efficiency of irradiated nuclear fuel recovery, decreased non-productive outlays, ruled out losses of MOX-fuel.

4 dwg

FIELD: construction.

SUBSTANCE: invention relates to nuclear power industry, in particular, to facilities for rehabilitation of environment when liquidating ponds with radioactive bottom deposits. The device for clean the pond from radioactive bottom deposits comprises a platform mounted on a pontoon with supports and a frame installed in supports with the possibility of vertical displacement with a receiving chamber made in the form of a rectangular tilted vessel. Suction nozzles of two pulsation valve submersible pumps, pumping and mixing, are submerged into the receiving chamber. The receiving chamber is connected to a compensating vessel that communicates via a filter to atmosphere, and via a check valve - to the pond. The injection pipeline of the mixing pulsation valve submersible pump is connected with a system of nozzles placed in a special manner inside the receiving chamber. The compressor is installed on the shore and is connected with a receiver, which is a part of pontoon vessels, with a flexible pipeline placed on floats. Operation of pumps is provided by air distributing devices, each comprising two valves, one valve is connected to a receiver, and the second one - via the filter to the ejector installed on the pontoon.

EFFECT: possibility to use jet erosion of bottom deposits and their discharge by pulsation pumps having high reliability.

5 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to radiochemical contamination/decontamination and can be used for decontamination of inner surface of pipelines conveying high-activity solutions and provided with protective coating and inaccessible for servicing and repair. Decontamination plant comprises detergent and decontamination agent solution chamber, compressed air feed and discharge chamber communicated with the latter and provided with air control valve composed by two fast-action valves fitted at compressed air feed and discharge pipelines, and control board. Valves bodies incorporate pressure device provided with decontaminating solution feed pipes and orifices communicating said pipes with pipeline to be decontaminated. Decontaminating solution chamber is connected to said decontaminating solution feed pipe of one of pressure device while receiver is connected with pipe of the other pressure device. Receiver volume is larger than that of decontaminating solution chamber. Decontaminating solution chamber and receiver can be arranged in safety plug seats, under shutoff valve.

EFFECT: smaller consumption of decontaminating solutions, higher efficiency of decontamination.

4 cl, 5 dwg

FIELD: physics.

SUBSTANCE: method of cleaning soil contaminated with a strontium radionuclide involves cutting and removing vegetation, adding lime and tilling the soil. After removing vegetation, the soil on the contaminated area is loosened at a depth of 1.2-1.5 m while feeding carbon dioxide gas into the bottom part of the loosened layer and water-retaining rolls are filled around the area after adding lime and tilling.

EFFECT: invention increases efficiency of fixing the strontium isotope outside the root layer.

FIELD: power industry.

SUBSTANCE: objective of the proposed technical solution of the device is creation of a special machine for cutting of a hole of large diameter in a thick-wall tube sheet around the caisson using technological machining methods under conditions of high embedded depth and narrowness of a cutout. The machine is equipped with a cutting tool rotation and vertical supply mechanism, as well as a moving platform. The machine is equipped with a horizontal supply mechanism and installed on guide posts arranged on the moving platform. A fixed support of the machine, at the end of which there is a conical cavity made coaxially to rotation axis of the cutting tool and into which a semi-spherical projection of a centring head, in the centre of which there is a blind hole, is installed on the caisson end face with its location along its inner diameter and is spring-loaded from below.

EFFECT: improving centring accuracy of a machine relative to a caisson being cut, reducing the time of guidance of a cutting tool and reducing dose loads on operating personnel and minimising radioactive emissions to environment.

5 dwg

FIELD: power engineering.

SUBSTANCE: invention relates to methods for radioactive wastes handling and may be used to dismantle caissons with installed defect irradiated fuel assemblies (IFA), which are in storages of nuclear-technological support (NTS) vessels. In a cavity of each caisson they add in sequence large-sized polyethylene, a mixture of crushed stone fractions, steel shots, and then Wood's alloy granules to the level of IFA brackets, afterwards the caisson is cut from the tube sheet of the storage tank, heated to melting with subsequent cooling and hardening of the Wood's alloy, afterwards a lifting cover is welded to the upper end of the caisson, and it is loaded with axial stretching load, then circular cutting of the caisson wall is carried out below location of fuel parts of the IFA with partial cutting of of the wall leaving 0.3-0.4 mm, then the axial stretching load is removed from the lifting cover, the caisson is torn off by jacks and transferred with the help of a transfer container into a transport radiation-safe container for storage and processing.

EFFECT: invention makes it possible to minimise radioactivity emissions into environment.

4 cl, 9 dwg

FIELD: power engineering.

SUBSTANCE: drainage network is built on a contaminated plot. At the same time in the soil below the root layer above the drainage a system of internal soil humidifiers is installed, flush water is supplied by even humidification of soil from the surface, and simultaneously a solution of sodium bicarbonate is supplied into internal soil humidifiers, and the flush water that leaked into the drainage network is removed for treatment from remaining radionuclides or recycling.

EFFECT: invention makes it possible to efficiently clean a root layer of soil from contamination with radionuclides, through settling and burial of strontium isotope outside a root layer.

1 dwg

FIELD: power engineering.

SUBSTANCE: in a pulsation valve submersible pump comprising a body, a pulse line, an inlet ball valve with a limiter of ball raising, an injection pipeline with an outlet ball valve, a chamber of lower nozzles, inside of which there is a shaft, which connects lower nozzles with a rotation drive and a control system, the chamber of lower nozzles is arranged in the body beyond a partition, which separates the body into the chamber of lower nozzles and a discharge chamber. The chamber of lower nozzles and the discharge chamber communicate with each other via a gap above the partition installed under the pulse line inlet into the body. In the partition there is a hole, in which there is a relief valve with a ball floating in water.

EFFECT: invention makes it possible to expand process capabilities of a pump due to realisation of simultaneous mixing and discharge of a suspension from a reservoir, and to increase efficiency of its operation.

2 cl, 3 dwg

FIELD: power engineering.

SUBSTANCE: inventions are related to methods of extraterrestrial burial of radioactive wastes and to spacecrafts (SC) with an electrojet propulsion system (EPS) for transportation of these wastes to areas of burial. The method includes placement of ampoules with specified wastes into heat-conductive matrices inside a container. Heat released in them is removed by coolant of the first closed circuit to a heat accumulator and further to a hot junction of a thermal electric generator. The cold junction is cooled with coolant of the second closed circuit, removing heat to the emitting radiator surface. Electric energy produced in the generator is supplied to the EPS. The coolant of the first circuit (for instance, lithium, potassium. caesium, mercury, bismuth, or gases) is partially used as a working body of the EPS. The flow of the latter is increased in accordance with the exponential law, selecting excessive coolant above the necessary one for removal of the current thermal power. This power drops as a result of radioactive decomposition of transported wastes. The first circuit of the coolant is equipped with a thermal throttle and an electric valve and has a branch at the outlet from the container. The first outlet of the branch is connected to the inlet of the thermal accumulator, and the outlet of the first circuit is connected with the inlet of the electric valve. The outlet of the electric valve is connected with the inlet of the thermal throttle, the outlet of which is connected with the outlet of the EPS working body reservoir.

EFFECT: increased mass of transported radioactive wastes by increasing thrust of EPS and reduction of its working body mass.

2 cl, 2 dwg

FIELD: physics, atomic power.

SUBSTANCE: invention relates to means of repairing nuclear power plants. The apparatus for repairing a damaged area of the underwater region of the wall of a container or reservoir, particularly in the region of the wall of a reservoir of a nuclear power plant includes a guiding system (6), which can be attached along a side wall (12) at a distance therefrom and can be fixed thereto. On the rails of the guiding system (6) there is at least a first support (20), which can be moved on the rails and can move in the longitudinal direction (5). A receiving element (30) capable of being displaced is placed on said support, said element being intended for an adhesive surface of a repair cover plate (22) which can be placed on the region of the wall having the damaged location (21). On the first support (20) there is at least one suction cup which is connected to a suction pipe and can be mounted on the side wall (12).

EFFECT: efficient repair of leaks.

6 cl, 8 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to servo drive with power plant to be used, for example, at nuclear power stations. Servo unit comprises power plant to drive mechanical element, mechanical element locator and mechanical element manual control device. The latter is arranged inside the so-called main shell. Said device is initiated by actuators arranged outside said main shell. Said shell is connected to power plant and to locator.

EFFECT: easy and fast access to servo drive components, possibility of starting the servo drive manual control.

9 cl, 4 dwg

FIELD: test equipment.

SUBSTANCE: invention can be used for generation of radiation defects and performance of radiation tests, and namely tests at investigation of influence of irradiation on mechanical properties, relationship between deformation of radiation deformation and radiation thermal creep of specimens of tested materials in nuclear reactors, and mainly in fast neutron reactors with a metal heat carrier, for example sodium, lead, and lead and bismuth ones. A device for testing materials in a nuclear reactor includes a housing, a valve and a sleeve with a hole, in which a cassette with specimens of materials, which are fixed in it, is located. The valve is fixed so that it can be moved in a longitudinal direction; besides, it closes the hole at an upward movement and opens it at a downward movement.

EFFECT: accelerating test performance; simplifying the design at improvement of fire safety.

8 cl, 1 dwg

FIELD: power engineering.

SUBSTANCE: in one version a circular structure is made with the possibility of assembly into a packet with similar structures to form a packet structure, which fully surrounds the inner retention limit. In the other version the circular structure has gaps of certain geometry to receive material that absorbs neutrons. According to one aspect, the circular structure is an intermediate device installed within the retention limit to hold a bucket with fuel and/or to improve heat removal via a retention limit. According to another aspect, the invention relates to a fuel bucket comprising one or more traps of neutron flux, which controls neutron radiation, and plates made of composite material on the basis of metal matrix.

EFFECT: increased radiation protection during transportation or storage of nuclear fuel, safe cooling of radiated nuclear fuel.

FIELD: transportation.

SUBSTANCE: fuel-handling machine of nuclear reactor comprises trolley with support and vertical working stem installed on trolley support with the possibility to diverge from vertical line. Trolley is equipped with controlled supports with shear pins and damping elements, which interact with stem. Such design of fuel-handling machine will make it possible to reduce stresses in unit of connection of working stem and trolley support.

EFFECT: improved operational reliability of fuel-handling machine.

2 cl, 6 dwg

FIELD: physics; transportation.

SUBSTANCE: operating platform for operator position during nuclear fuel recharge on vessels with nuclear steam plant includes interconnected platforms, rail barriers and traps. Operating platform consists of at least two platforms connected by strainers. Strainers are mounted in boards with through slots and fixed nuts with washers adjusting gap between platforms. Platform is mounted on steam generator cap eyebolts tilted against platform symmetry axis, by hooked bolts adjusting platform position against reactor axis. Platform features boards and scuppers for deactivation solution collection, and arm supporting power and recharge equipment control cables. The arm can rotate around its axis. Also the platform includes annular base protecting reactor instruments from mechanical damage, a shutter between platform and base, preventing radioactive contamination.

EFFECT: improved operational safety, reduced radiation impact amount on personnel; reduced radioactive contamination, prevention of cable twisting; reduced time of platform resetting during reactor recharge, enhanced operation reliability and manoeuvrability of operating platform.

7 cl, 2 dwg

The invention relates to nuclear energy production and may be used to control the position of elements active area of fast reactors

The invention relates to mechanical engineering and can be used in a copying sealed manipulators

O-ring seal // 2128866
The invention relates to the field of sealing technology, applies, in particular, seals cylindrical surfaces of joints operated under varying temperature and pressure, and can be used, for example, in the fuel assemblies of nuclear reactors for sealing technological channels channel nuclear reactors

O-ring cuff // 2127458
The invention relates to the field of sealing technology, applies, in particular, cylindrical surfaces of joints operated under varying temperature and pressure, and can be used, for example, in the fuel assemblies of nuclear reactors for sealing technological channels channel nuclear reactors

FIELD: physics; transportation.

SUBSTANCE: operating platform for operator position during nuclear fuel recharge on vessels with nuclear steam plant includes interconnected platforms, rail barriers and traps. Operating platform consists of at least two platforms connected by strainers. Strainers are mounted in boards with through slots and fixed nuts with washers adjusting gap between platforms. Platform is mounted on steam generator cap eyebolts tilted against platform symmetry axis, by hooked bolts adjusting platform position against reactor axis. Platform features boards and scuppers for deactivation solution collection, and arm supporting power and recharge equipment control cables. The arm can rotate around its axis. Also the platform includes annular base protecting reactor instruments from mechanical damage, a shutter between platform and base, preventing radioactive contamination.

EFFECT: improved operational safety, reduced radiation impact amount on personnel; reduced radioactive contamination, prevention of cable twisting; reduced time of platform resetting during reactor recharge, enhanced operation reliability and manoeuvrability of operating platform.

7 cl, 2 dwg

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