Abrégé

The basket is a metal structure consisting of a base (supporting disk) (1), heat-removing aluminum disks (2), intermediate disks (3), channels (4) for sealed canisters, vertical clamping elements, in this case, strainers (5) and (6). Base (1) - welded structure made of corrosion-resistant steel performs the function of the carrying element of the basket. From above, the base (1) has (7) grooves and (8) hooks for installing canisters. Disks (2) and (3) are equidistant to each other in certain order, thereat two rows of round apertures are made in disks (2) and (3) relative to their axes. There are two apertures made in the inner row of apertures and eight - in the outer. Channels (4) (pipes) made of boron steel are installed in the holes, and the channels are made with the possibility of placing sealed canisters with spent fuel assemblies into them. Channels (4) protect the sealed canisters (4) from mechanical damage. Sleeves (9) made of aluminum alloy are installed between steel disks (3) and aluminum disks (2). Assembling all parts of the basket into a single section is ensured by strainers (5) and (6), located along the perimeter of disks (2) and (3), as well as around the circumference between the axis of inner and outer rows of apertures.

Classes IPC  ?

• G21F 5/00 - Récipients blindés portatifs ou transportables

Abrégé

The invention relates to baskets for casks for the transportation and temporary storage of fuel assemblies from a pressurized water reactor. The present basket for a transportation and storage cask for spent nuclear fuel from a pressurized water reactor comprises a base, to which are fastened, one above the other, steel discs and aluminium discs disposed between said steel discs. The discs are provided with two rows of openings. Channels are mounted in said openings. The basket is comprised of a single section and is provided with additional vertical elements for fastening the discs, said elements being arranged in a circle between the axes of the inner and outer rows of openings in the discs. The openings and the channels are circular and are capable of receiving canisters for spent fuel assemblies. The base of the basket is provided with grooves and detents for said canisters. The inner row of openings is comprised of two openings, and the outer row is comprised of eight openings. The invention makes it possible to uphold the dimensions of existing baskets of transport packages for pressurized water reactors and to improve the maintainability of the basket.

Classes IPC  ?

• G21F 5/00 - Récipients blindés portatifs ou transportables

Abrégé

The present casing of a transport package is a metal structure configured as a rustproof, hollow cylinder having a support disk that is perforated for receiving hexagonal tubes, and an inner part of the cylinder consists of a rustproof vertical element fastened to the center of the disk, said vertical element having spacing disks fastened thereon which have hexagonal tubes inserted therein for the installation of spent fuel assemblies. Moreover, the hexagonal tubes are one-piece rustproof tubes having hexagonal rings made of an aluminium-based boron-containing composite material placed thereon. Circular neutron-absorbing rings made of an aluminium-based boron-containing composite material and comprised of segments are arranged on the inner side of a shell of the casing, and an open space from the central vertical element to the shell is filled with molten aluminium.

Classes IPC  ?

• G21F 5/008 - Récipients pour éléments combustibles

Abrégé

The invention relates to nuclear engineering, namely to methods for long-term dry storage of spent nuclear fuel and casks intended for this purpose. The invention allows increasing the safety of long-term storage of spent nuclear fuel by continuous monitoring the pressure of inert gas injected into the cavity between two lids of the SNF cask, which does not have direct contact with the inner cavity of the cask. A method for long-term dry storage of spent nuclear fuel includes injecting the inert gas into a cavity formed in the cask between the inner and outer lids under pressure greater than the pressure of the inert gas in the inner cavity of the cask in which the spent nuclear fuel is located. The spent nuclear fuel cask for long-term storage contains a body with a spent nuclear fuel container placed in it, tight inner and outer lids forming a cavity into which the inert gas is pumped under pressure greater than the pressure in the inner cavity of the cask, while in the outer lid there is a labyrinth hole closed with a flange and sealed with a gasket, an angle valve is installed in the flange, to which at least, two pressure sensors are connected, an angle valve and sensors are covered with a protective cover during long-term storage, in the lower flange of which there is an annular groove in which the gasket is installed.

Classes IPC  ?

• G21F 5/00 - Récipients blindés portatifs ou transportables
• G21F 5/12 - Dispositifs obturateurs pour récipients; Dispositions pour leur étanchéité

Abrégé

The invention is related to sealing devices and it can be used to seal protective lids in casks (containers) for transportation and/or long-term storage of radioactive materials, as well as for sealing flange joints for pipes, fittings, pressure vessels, etc. Task that should be solved by the requested invention is referred to production of the seal (gasket) for internal and external lids for shipping packages, providing double tight barrier and possibility to monitor tightness in both circuits of the seal. The seal contains a metal ring, placed between graphite layers, where sections of the metal ring to be coated with graphite have jagged profile, and as both sides of the metal ring are coated with graphite in such a way that graphite layers and the metal ring form a seamless whole. Recesses are made in the seal on both sides between graphite rings, a hole is placed in their centre.

Classes IPC  ?

• G21F 5/12 - Dispositifs obturateurs pour récipients; Dispositions pour leur étanchéité

Abrégé

The invention relates to sealing technology and can be used for sealing protective covers of containers for the transportation and/or long-term storage of radioactive materials, and also for hermetically sealing flanged pipe connections, fittings, pressure vessels, and the like. A seal comprises a metal ring disposed between graphite layers, wherein the regions of the metal ring to which graphite is to be applied have a toothed profile, and graphite is applied to form rings on both sides of the metal ring so that the graphite layers and the metal ring form a seamless whole. Recesses are formed from both sides of the seal, between the rings of graphite, said recesses having openings in the centre thereof.

Classes IPC  ?

• G21F 5/12 - Dispositifs obturateurs pour récipients; Dispositions pour leur étanchéité