RU140343U1 - INDUSTRIAL PACKAGING FOR SOLID RADIOACTIVE WASTE - Google Patents

Abstract

1. Industrial packaging for low-level radioactive waste, made in the form of a rectangular case, equipped with a door with its fixation elements in the closed position, elastic seals are made around the door perimeter, side longitudinal and end walls of the case are equipped with vertically mounted force elements, the case is made with internal and external protective coatings, characterized in that the door of the housing is made in the form of a removable roof, while the inner coating of the housing is made on the basis of polyurea tomera.2. Industrial packaging according to claim 1, characterized in that the housing base is equipped with a lockable drainage channel device made in the form of a curved pipe.

Description

The utility model relates to nuclear energy and can be used for the treatment of solid and solidified radioactive waste during their intermediate storage at storage sites (open areas, under awnings, in pavilions) and transportation.

Known metal containers for the treatment of solid radioactive waste "Krad-1.36", "Krad-3.0", "KMZ" (http://www.345mz.ru/ru/page/n100.html), KTBN- 3000 (http://www.ecomet.ru), UKT-1A-6M4, UTK-1A-6K9 (http://www.onegastar.ru).

The main disadvantages of these containers is the lack of usable volume.

Also known from the prior art is the UKTN-24000 large-tonnage transport container for low-level radioactive waste selected by the applicant as a prototype (http://www.ecomet-s.ru/transportirovanie-rao.html#&panel1-1), made in the form of a rectangular case, equipped with an end double-leaf door with fixation elements in the open and closed position, elastic seals are made around the door perimeter, the side longitudinal and end walls of the body are equipped with vertically mounted power elements, the body is made with internal and external Barrier coatings.

The disadvantages of the prototype container for use as an industrial package for the localization of radioactive waste (RW) are:

- the possibility of only end loading of radioactive waste, which complicates the operations of loading waste due to the need for additional fragmentation when loading large-sized equipment, reduces the degree of filling of the container, and also increases the danger when handling radioactive waste, and also does not allow temporary storage of radioactive waste in this container in due to the fact that the end-loading container cannot guarantee complete isolation of the waste from the environment throughout its temporary storage;

- low resistance of the coating of internal surfaces to decontamination solutions.

The task to which the claimed utility model is aimed is to eliminate the disadvantages of the prototype by creating industrial packaging for the temporary storage (up to 15 years) of low-level radioactive waste, the design of which will provide convenient loading / unloading of waste, as well as improving the environment from getting into it radioactive substances contained in industrial waste packaging.

The technical result is to increase the operational characteristics of industrial packaging for low-level radioactive waste.

The specified technical result is achieved by the fact that the industrial packaging for low-level radioactive waste is made in the form of a rectangular case equipped with a door with its fixation elements in the closed position, elastic seals are made around the door perimeter, the side longitudinal and end walls of the case are equipped with vertically mounted power elements, the case is made with internal and external protective coatings, and the door of the housing is made in the form of a removable roof, and the inner coating of the housing is made on polycarbamide elastomer again.

The implementation of the door of the case in the form of a removable roof allows the top loading of the container with bulky waste without preliminary fragmentation, which when loading / unloading is performed using special lifting mechanisms, which cannot be done when loading through the end double-leaf door. In addition, thanks to the aforementioned door, a complete isolation of the waste from the environment is ensured throughout the entire temporary storage of waste.

The implementation of the inner coating of the housing from a material based on a polycarbamide elastomer allows to increase the resistance of the inner coating to deactivating solutions, mechanical and corrosion resistance, as well as resistance to chemically aggressive environments. This is achieved due to the unique properties of polycarbamide elastomer (polyurea), which combines high strength, high wear resistance, as well as high resistance to the effects of solutions with varying degrees of chemical and biogenic aggressiveness.

The technical result is also achieved by the fact that the base of the housing is equipped with a lockable drainage channel made in the form of a bent pipe, which provides, in contrast to the prototype, a solution draining after decontamination, thereby greatly facilitating the collection of waste decontamination solutions contaminated with radionuclides.

The proposed industrial packaging is illustrated by the following drawings.

In FIG. 1 shows the appearance of industrial packaging.

In FIG. 2 shows the appearance of an industrial package without a roof.

In FIG. 3 shows the appearance of a loaded industrial package without a roof.

In FIG. 4 shows a sectional view of a drainage channel device.

The claimed industrial packaging has the following main design parameters and characteristics:

empty packaging mass (∗ - taking into account the inner and 2280 (2365 ∗) outer coatings), kg, not more

weight of loaded packaging, kg, no more 24000

overall dimensions of packaging, mm

length 6058 width 2438 height 1340

internal package sizes, mm, no more

length 5922 width 2305 height 1083

roof opening dimensions, mm, no more

length 5422 width 2218 internal packing volume, cubic meters, not less 13.8

Structurally, the housing of FIG. 1 industrial packaging consists of panels of the end and side walls 1 and 2, as well as of the base panel 3 (see Fig. 2) and the roof 4, made of steel grades 09G2 or 09G2S with a thickness of 2 mm. The panels of the end and side walls 1, 2 with the base panel 3 are supported by power elements - a supporting frame of rectangular pipes 5, corners 6 and channels 7, made of steel of strength class 345 according to GOST 19281-89, having a thickness of 3 and 4 mm. The walls of the packaging do not have doors; loading is carried out exclusively from above. For this, the roof 4 is removable with locking devices 8 on each long side. Locking devices 8 are hinged bolts M14 with turnkey nuts. To ensure the tightness of the internal volumes, the joints of the walls and the floor are hermetically boiled, between the roof 4 and the upper beam of the housing along the entire perimeter of the roof there is an elastic seal made of profile oil and gasoline-resistant rubber (not shown conventionally in Fig.). The design of the removable roof provides the ability to manipulate the roof using a crane or other load-lifting mechanism, eliminates spontaneous depressurization of the packaging during transportation and storage under normal use, and eliminates atmospheric precipitation and sparks from entering the inner packaging volume.

In order to fix the cargo during transportation, elements for fastening are provided inside the package 9. Primary packages 10 with radioactive waste (see Fig. 3) are fastened in the claimed industrial package using flexible linking means located on the structural elements, for example, tie straps 11. For loading and unloading and stacking operations are provided with upper and lower corner fittings 12, as well as fork pockets 13. To drain the internal volume from liquid media (during decontamination), a drainage channel device is provided la, made in the form of a curved pipe 14 and hermetically connected to the fitting 15 of the external placement, which is blocked by a cover 16 (see Fig. 4). Access control to the drainage drain is carried out using intervention indication devices (sealing).

The inner surfaces of the package are covered with a protective coating “Karboflex”, which is a two-component system based on polycarbamides, consisting of resins AC-100 (a mixture of polyetheramines with additives) and B-100 isocyanate (polyurethane prepolymer). The external surfaces are coated with highly structured acrylic resin based paint of non-chlorinated plasticizer of the “Hempatex Hi-Bild 46410” type. The inner and outer coatings provide the possibility of multiple decontamination using decontamination solutions based on surfactants, weak acids, and alkalis.

Packing with radioactive waste can be carried out by rail and road transport in the III transport category.

The packaging design under normal conditions of transportation and storage provides:

- preventing the release and dispersal of radioactive contents;

- the reliability of the fastening system for primary packaging with radioactive waste, which prevents leakage of radioactive substances;

- RW safety during transportation and stay under the influence of precipitation;

- the ability of the loaded package to withstand loads when freely falling from a height of 0.3 m to each angle, with a permissible maximum level of radiation increase on the outer surface of not more than 20% of the maximum value;

- the ability to assemble and disassemble (extract) the components of the primary packaging fastening system with radioactive waste;

- decontamination of external and internal surfaces and its components;

- implementation of manipulations with the help of lifting mechanisms;

- permissible loads on the supporting surfaces of the package within the limits established for the respective modes of transport and the possibility of stacking loaded packages of up to six tiers;

- reliable fixation of packages on specific modes of transport;

- guaranteed safety of the mechanical, strength and operational characteristics of the packaging in conditions of placement on open areas for up to 15 years, at temperatures from minus 50 to plus 70 ° C.

The packaging design meets the requirements for industrial packaging of type 2 (PU-2) in accordance with NP-053-04. When loading RW and during transportation, the package meets the requirements of NP-053-04, the Rules for the Safe Transport of Radioactive Materials (safety standards series ST-1, MA-GATE, Vienna, 1996 edition) presented for packages of type PU-2, SanPiN 2.6 .1.1281-03.

Claims (2)

1. Industrial packaging for low-level radioactive waste, made in the form of a rectangular case, equipped with a door with its fixation elements in the closed position, elastic seals are made around the door perimeter, side longitudinal and end walls of the case are equipped with vertically mounted force elements, the case is made with internal and external protective coatings, characterized in that the door of the housing is made in the form of a removable roof, while the inner coating of the housing is made on the basis of polyurea Tomer. 2. Industrial packaging according to claim 1, characterized in that the housing base is equipped with a lockable drainage channel device made in the form of a curved pipe.

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