EP3698381A1 - Ensemble comprenant un emballage de transport de matieres radioactives et des moyens de surelevation de cet emballage par rapport a une plateforme de base - Google Patents
Ensemble comprenant un emballage de transport de matieres radioactives et des moyens de surelevation de cet emballage par rapport a une plateforme de baseInfo
- Publication number
- EP3698381A1 EP3698381A1 EP18836281.8A EP18836281A EP3698381A1 EP 3698381 A1 EP3698381 A1 EP 3698381A1 EP 18836281 A EP18836281 A EP 18836281A EP 3698381 A1 EP3698381 A1 EP 3698381A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- walls
- plate
- package
- side elevation
- assembly according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 32
- 239000012857 radioactive material Substances 0.000 title claims abstract description 19
- 230000035939 shock Effects 0.000 claims description 20
- 238000013459 approach Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000003028 elevating effect Effects 0.000 claims description 2
- 238000013016 damping Methods 0.000 description 6
- 230000001154 acute effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F5/00—Transportable or portable shielded containers
- G21F5/06—Details of, or accessories to, the containers
- G21F5/08—Shock-absorbers, e.g. impact buffers for containers
Definitions
- the present invention relates to the field of transporting radioactive materials. It relates more particularly to an assembly comprising a radioactive material transport packaging, mounted on a base platform generally intended to be an integral part of a transport vehicle platform.
- a radioactive material transport package usually has a side body, a bottom and a lid. These parts of the package define a housing cavity for radioactive materials, for example nuclear fuel assemblies or waste cases.
- a basket can be arranged within the housing cavity to define compartments in which are placed the different cases / assemblies.
- the package usually comprises shock absorbing hoods.
- the latter For the transport of the packaging between different sites, the latter is placed on a transport vehicle, for example a motor vehicle road transport.
- the vehicle usually has a platform, called base platform, receiving elevation means of packaging, also called chassis.
- the entity formed by the package and its raising means can be put in place and mounted on the base platform of the vehicle, the latter then providing transportation.
- the entity before being mounted on the vehicle, the entity also comprises at least one removable portion of the platform of this vehicle.
- the entity On arrival at the site, the entity can be removed from the base platform, but more generally, only the package is removed because the raising means remain on the vehicle.
- the safety demonstration of the packaging is based in particular on regulatory fall tests such as free fall or punch fall, with the packaging loaded or not loaded with radioactive materials, the worst case being chosen. Also, packaging is designed to meet these requirements necessary for their certification.
- Another solution may be to provide raising means formed by a damping block, for example made of wood, honeycomb or aluminum foam.
- a damping block for example made of wood, honeycomb or aluminum foam.
- these massive dampers induce acceleration peaks on the package, capable of causing damage to the latter as well as the radioactive content arranged in the package.
- this design leads to uncertainties as to the proper functioning of the shock absorbing hoods, during the crushing phase simultaneously involving the damper block and these shock absorbing hoods.
- the invention therefore aims to at least partially overcome the disadvantages mentioned above, relating to the achievements of the prior art.
- the subject of the invention is an assembly comprising:
- a package for transporting radioactive materials comprising a lateral body extending around a longitudinal axis of the package, the latter also comprising at least one shock absorbing cover arranged at a longitudinal end of said lateral body; each shock absorbing hood extending laterally beyond the lateral body,
- a base platform delimiting a base surface located at a distance from each shock absorbing hood
- said raising means consist of the following elements:
- an upper support structure of the lateral body of the package said upper support structure extending at least partly under the lateral body of the package;
- each side wall consisting of:
- each main portion connecting the upper and lower connection portions, each main portion extending downwards, in said superposition direction, beyond each shock absorbing cover, and each main portion being formed of a single plate or a plurality of plates connected end-to-end and inclined relative to each other, each plate being arranged to define a non-zero angle with the direction of superposition, in any cutting plane passing through the plate on all its height and including the direction of superposition.
- the invention advantageously offers a simple construction of the raising means, to ensure the necessary rigidity in normal transport conditions, and to easily deform in case of a fall, at least at the plastic deformation zones. Therefore, before and during the damping of the fall by the / shock absorbing hoods, the risk of damage to the packaging by the raising means, as well as the risks of too severe acceleration of the packaging, are greatly diminished or even reduced to nothing.
- the invention preferably provides at least one of the following optional features, taken alone or in combination.
- Said upper support structure comprises at least one support plate, and at least one of the elevation side walls is made in one piece with said support plate, and preferably two side elevation walls are made of a alone holding with said support plate being arranged on either side of a fictitious plane of symmetry of the same support plate.
- Said upper support structure may comprise two support plates superimposed in the superposition direction, and said plurality of elevation side walls consists of four walls, among which two side elevation walls are made in one piece with the plate of most support high, and the other two side elevation walls are made in one piece with the lowest support plate. This facilitates the manufacture of raising means when they are equipped with four side walls.
- said upper support structure comprises a support plate made in one piece with all the walls of said plurality of side elevation walls.
- said plurality of elevation sidewalls consists of four walls facing each other in pairs, a first pair of walls each having a main portion formed of a single sloped plate so that the two single plates approach each other. each other upwardly, and a second pair of walls each having a main portion formed of a single sloped plate so that the two single plates move towards each other towards each other the bottom.
- the inclination inwards of the main portions of the second pair of walls reduces the overall size of the raising means, and thus reduces the risk of interaction with the shock absorbing covers in case of a fall.
- said plurality of side elevation walls consists of two facing walls, the main portion of each of which preferably consists of two plates inclined relative to one another and connected end-to-end by a zone of intermediate plastic deformation.
- the inclination retained between the two plates therefore leads to the formation of this zone of intermediate plastic deformation which, like the aforementioned plastic deformation zones, contributes to a better control as well as a reduction of the buckling peak necessary for the crushing the raising means.
- said support structure comprises a support plate made in one piece with both side elevation walls.
- the two side elevation walls are made in one piece within which the two support portions are located in continuity with one another, and said upper support structure is preferably made of a single piece with these side walls of elevation, in having a first plate carried by the upper connecting portion of one of the two walls, and a second plate separated from the first and carried by the upper connecting portion of the other of the two walls.
- the upper support structure is in the form of a single plate, the raising means being then formed by a single tubular piece.
- each zone of intermediate plastic deformation is formed so as to form a salient angle opening outwardly of the raising means.
- the projecting angle may open inwards, for example to form section elevation means in the general shape of a hexagon.
- the upper support structure has a perimeter defined by several sides, at least some of which are connected to a side elevation wall whose width is substantially identical to that of said associated side.
- the package comprises two shock absorbing covers arranged at the opposite longitudinal ends of said lateral body, and said raising means are arranged axially between the two covers.
- said base surface is substantially planar.
- said base platform is a platform, removable or not, a transport vehicle.
- said base platform is the combination of a platform, removable or not, a transport vehicle, and a fastening plate secured to the support portions of the side walls of elevation, this fixing plate covering at the least partly said platform.
- the subject of the invention is also a vehicle for transporting radioactive materials equipped with at least one assembly as described above.
- FIG. 1 shows a perspective view of an assembly according to a first preferred embodiment of the invention, incorporating in particular a transport packaging of radioactive material;
- FIG. 2 is a perspective view of a radioactive material transport vehicle equipped with the assembly shown in the previous figure;
- FIG. 2a is a simplified view similar to that of Figure 2, showing an alternative embodiment
- FIG. 2b is a schematic perspective view showing the disconnection of the package after transport
- FIG. 3 represents a perspective view of the raising means implemented in the assembly shown in FIG. 1;
- FIG. 4 is a front view of that shown in the previous figure
- FIG. 5 is a sectional view taken along the line V-V of FIG.
- FIG. 6 is a perspective view similar to that of Figure 3, with the raising means shown in a deformed state following a drop of 9m of the assembly according to the first preferred embodiment of the invention;
- FIG. 7 shows a perspective view of the raising means, according to a second preferred embodiment of the invention.
- FIG. 8 shows a sectional view of the elevation means shown in the previous figure
- FIG. 9 represents a perspective view of the raising means according to a third preferred embodiment of the invention.
- FIG. 10 is a side view of an assembly in the form of a fourth preferred embodiment of the invention.
- - Figure 11 is a side view similar to that of Figure 10, with the raising means shown in a deformed state following a drop of 9m of the assembly; and - Figure 12 is a side view similar to that of Figure 10, showing the raising means according to an alternative embodiment.
- FIG. 1 there is shown a set 100 according to a first preferred embodiment of the invention, this assembly 100 comprising in particular a package 1 for the transport of radioactive material, a base platform 5 , as well as means 3 of elevation of the package with respect to the platform 5, these elevating means 3 being comparable to a support frame of the package.
- the package 1 is provided with a lateral body 2, a bottom and a lid closing an opening of the package opposite the bottom.
- the lateral body 2 extends around a longitudinal axis 8 of the package, oriented substantially horizontally in the transport position as shown in FIG. 1.
- the package forms an outer envelope of a package and defines a cavity for housing the radioactive material, and possibly a storage basket.
- the radioactive materials may for example be waste cases, or assemblies of nuclear fuel.
- the bottom and the cover are not visible because they are covered respectively by two shock absorbing hoods 6 mounted at the longitudinal ends of the packaging body. These covers 6 extend laterally beyond the lateral body 2, that is to say that they have a greater radial size than that of the lateral body, the radial direction being considered here in relation to the longitudinal axis 8.
- This axis is centered relative to the side body 2, and through the lid and the bottom of the same packaging. It is arranged substantially parallel to the base platform 5, which is constituted by the removable platform of a road transport vehicle of radioactive materials.
- This platform delimits with its upper surface a base surface 10 which is here preferably flat, and oriented substantially horizontally.
- This base surface 10 is arranged at a distance from the shock absorbing hoods 6, in a vertical direction of superposition 12 according to which are superimposed the package 1, the raising means 3, and the base platform 5.
- FIG. 2a shows an alternative in which the basic platform 5 resides in the combination of the platform 5a of the transport vehicle, and a fixing plate 5b secured to the raising means 3 covering a portion of the platform 5a.
- the base surface 10 delimited by the elements 5a, 5b has a recess at the fixing plate 5b, as can be seen on the dotted line 10 of FIG. 2a.
- the platform 5a of the vehicle 20 could have a recess so that once the fastening plate 5b assembled, the base surface 10 is flat or substantially flat.
- the fixing plate 5b constitutes the bottom of a box to be fixed on the platform 5a of the vehicle 20, with this box containing the package 1 and its raising means forming a frame .
- the elevation means 3 thus make it possible to raise the package 1 with respect to the base surface 10, in the vertical direction of superposition 12.
- the upper end of the means 3 supports the lateral body 2 of the package, while its lower end is supported and fixed the base surface 10. It is noted that its upper end can cooperate directly with the usually cylindrical outer surface of the lateral body 2, or this the latter can be equipped locally with a cradle 15 intended to provide a substantially flat and horizontal bearing surface for this upper end of the raising means 3.
- holding means 14 for example of the type straps and / or connecting rods and / or chains.
- These holding means 14 connect the securing members of the lateral packaging body 2 to the base platform 5. They are dismounted after the transport of the package 1, so that the latter can be detached from the raising means 3 and moved to a storage site.
- This disassembly is shown schematically in Figure 2b.
- One of the particularities of the invention lies in the design of the raising means 3, several embodiments of which will now be described with reference to the following figures.
- elevation means 3 according to the first preferred embodiment of the invention. These means are formed by a structure made in one piece, that is to say a piece in one piece. It contrasts in particular with parts produced by the assembly of distinct elements, for example by welding or by similar fastening means, even if this possibility remains possible for the present invention. In this respect, it is noted that the fact of providing one-piece elevation means makes it possible to better control its deformation in the event of the assembly 100 fall.
- the elevation means 3 comprise firstly an upper support structure 22, which is a support plate oriented substantially horizontally and intended to extend preferably entirely under the lateral packaging body. It is this structure 22 which cooperates and supports the cradle of the lateral body of the package. To ensure proper positioning of the latter, the structure 22 may be equipped with one or more centering pins 24 arranged vertically, intended to penetrate into corresponding orifices of the aforementioned cradle.
- the lateral packaging body is simply plated vertically downwards against the upper support structure 22, and held against it via the fastening straps referenced 14 in FIG.
- the upper support structure 22 has a square or rectangular shape, whose perimeter is formed of four sides. From each of these four sides emerges a side elevation wall 26a, 26b, of width substantially identical to that of its associated side. Each side wall 26a, 26b consists of several elements always made within the same room, which will now be described.
- each side wall 26a, 26b has a bearing portion 30 on the base surface 10 of the base platform of the assembly.
- Each portion 30, oriented parallel to the upper support structure 22, is preferably fixed on this base surface 10 by means of bolts or similar elements conferring a reversible mechanical attachment.
- the wall 26a, 26b also comprises a lower portion 32 for connection with the bearing portion 30, this portion 32 also forming a plastic deformation zone and taking the form of a connecting radius or a fold.
- a main portion 34 connecting the upper and lower connection portions 28, 32.
- This main portion 34 extends downward, in the vertical direction of superposition 12, beyond the shock absorbing covers of the 'packaging. It is formed of a single plate arranged to define a non-zero angle with the direction of superposition, in any cutting plane traversing the plate over its entire height and including the direction of superposition 12.
- the acute non-zero angle A1 defined between each main portion 34 and the direction 12 is preferably between 20 and 70 °, the value being preferably the same or substantially identical for the four side walls 26a, 26b.
- the four side elevation walls 26a, 26b are arranged facing two by two, to form a first pair of walls 26a and a second pair of walls 26b.
- the main portions 34 of the first pair of walls 26a are inclined so that the two single plates constituting them approach each other while going upwards, while the main portions 34 of the second pair of walls 26b are inclined so that the two single plates approach each other by going down.
- It is these latter walls 26b which are spaced apart from one another in the longitudinal direction of the package, and which, by their inclination towards the inside of the means 3 while going downwards, limit the bulk of these means 3 in order to avoid in particular any interference with the damping hoods in the event of a fall.
- the two side walls 26b are thus arranged on either side of a notional plane PI of symmetry of the support structure 22, this imaginary plane PI preferably constituting a first plane of symmetry for the elevation means 3.
- this imaginary plane PI preferably constituting a first plane of symmetry for the elevation means 3.
- the two side walls 26a are arranged on either side of another imaginary plane of symmetry of the support structure 22, this imaginary plane defined by the line VV of FIG. 4 preferably constituting a second plane of symmetry. for these same elevation means 3, this second plane being orthogonal to the first.
- the upper connecting portion 28 of each side wall 26a is configured to define, between the upper support structure 22 and the main portion 34, a first obtuse angle Agi between 110 and 160 °.
- the lower connecting portion 32 is configured to define, between the bearing portion 30 and the main portion 34, a second obtuse angle Ag2 between 110 and 160 °.
- the upper connecting portion 28 of each side wall 26b is configured to define, between the upper support structure 22 and the main portion 34, a first acute angle Agi 'of between 20 and 70 °.
- the lower connecting portion 32 is configured to define, between the bearing portion 30 and the main portion 34, a second acute angle Ag2 'also between 20 and 70 °.
- the risks of damage to the package 1 by the raising means 3 are low or even harmful, as well as the risks of accelerations too severe packaging during this fall.
- FIG. 7 and 8 there is shown a second preferred embodiment of the present invention. It has many similarities with the first mode described above. Moreover, in the figures, the elements bearing the same reference numerals correspond to identical or similar elements. The only difference between the two modes lies in the segmentation of the raising means 3 into two distinct parts, and no longer in the realization of these means 3 in one piece. More specifically, a first part made in one piece incorporates the first pair of side walls 26a, and a first plate 22a forming part of the support structure 22. This first part constitutes the outer part of the means 3. A second integral part incorporates the second pair of side walls 26b and a second plate 22b also forming part of the support structure 22. The two plates 22a, 22b are substantially identical and superimposed in the direction 12, the first plate 22a being preferably the highest in the stack of these two plates jointly constituting the structure 22.
- the advantage of this second preferred embodiment lies in the simplicity of manufacturing the raising means 3, thanks to their segmentation into two pieces easy to manufacture, for example using conventional techniques of the type stamping.
- FIG. 9 represents a third preferred embodiment of the invention, in which the raising means 3 are made only with the first piece of the second mode described above. It is a part made in one piece and thus incorporating the support plate 22a, as well as the two side walls 26a elevation. This third mode is adopted when the mechanical strength offered by the raising means 3, under normal conditions of transport and despite the presence of only two side walls, is deemed sufficient.
- FIG. 10 represents a fourth preferred embodiment of the invention, in which the raising means 3 are made in one piece constituted by the plate 22 supporting the package 1, and by only two side walls 26a. These walls 26a, facing one another, may be spaced in the direction of the longitudinal axis 8 as in Figure 10, or in a transverse direction of the package.
- the side walls 26a which always each comprise the two connecting portions 28, 32, the support portion 30 fixed on the base surface 10, and finally the main portion 34.
- the latter consists of two plates 34a, 34b inclined relative to each other and connected end-to-end by an intermediate plastic deformation zone 44 also taking the form of a radius of connection or fold.
- the upper plate 34a and the lower plate 34b jointly form a protruding angle B1 opening outwards.
- This angle B1 is preferably between 100 and 170 °.
- the raising means 3 crash like a bellows.
- the radius of curvature decreases and the fold increases.
- the elevation means 3 are always made in one piece, but within which the two support portions 30 of the two side walls 26a are no longer distinct. one of the other as in the mode of Figure 10, but instead arranged in the continuity of one another without breaking between them. In other words, the two support portions 30 are formed within a single uninterrupted plate, as shown in FIG. 12.
- the support structure 22 is no longer formed by a single uninterrupted plate as in the embodiment of FIG. 10, even if this remains possible, but it is preferentially segmented into a first plate 22 'and a second plate 22 '' separated from each other.
- the first support plate 22 ' is carried by the upper connecting portion 28 of one of the two side walls 26a, while the second support plate 22' 'is carried by the upper connecting portion 28 of the other wall lateral 26a.
- the falling behavior of this alternative is identical or similar to that of the fourth mode of FIGS. 10 and 11.
- the number of inclined plates forming each main portion may be greater than two.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Buffer Packaging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1762983A FR3076058B1 (fr) | 2017-12-22 | 2017-12-22 | Ensemble comprenant un emballage de transport de matieres radioactives et des moyens de surelevation de cet emballage par rapport a une plateforme de base |
PCT/FR2018/053319 WO2019122642A1 (fr) | 2017-12-22 | 2018-12-17 | Ensemble comprenant un emballage de transport de matieres radioactives et des moyens de surelevation de cet emballage par rapport a une plateforme de base |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3698381A1 true EP3698381A1 (fr) | 2020-08-26 |
EP3698381B1 EP3698381B1 (fr) | 2021-08-25 |
Family
ID=61913318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18836281.8A Active EP3698381B1 (fr) | 2017-12-22 | 2018-12-17 | Ensemble comprenant un emballage de transport de matieres radioactives et des moyens de surelevation de cet emballage par rapport a une plateforme de base |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3698381B1 (fr) |
FR (1) | FR3076058B1 (fr) |
WO (1) | WO2019122642A1 (fr) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2588993B1 (fr) * | 1985-10-17 | 1988-01-08 | Transnucleaire Sa | Emballage pour le transport de matieres dangereuses |
US5841147A (en) * | 1997-03-12 | 1998-11-24 | Newport News Shipbuilding And Dry Dock Company | Intermodal modular spent nuclear fuel transportation system |
FR2846778B1 (fr) * | 2002-11-06 | 2005-04-08 | Cogema Logistics | Conteneur pour le stockage/transport de matieres radioactives non irradiees telles que des assemblages de combustible nucleaire |
JP5401524B2 (ja) * | 2011-10-19 | 2014-01-29 | 原子燃料工業株式会社 | 燃料ホルダ、燃料ホルダの使用方法、及び燃料集合体の輸送方法 |
FR3009762B1 (fr) | 2013-08-14 | 2018-03-09 | Tn Int | Ensemble comprenant un emballage de transport de matieres radioactives et un chassis de support de l'emballage |
-
2017
- 2017-12-22 FR FR1762983A patent/FR3076058B1/fr not_active Expired - Fee Related
-
2018
- 2018-12-17 WO PCT/FR2018/053319 patent/WO2019122642A1/fr unknown
- 2018-12-17 EP EP18836281.8A patent/EP3698381B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
WO2019122642A1 (fr) | 2019-06-27 |
FR3076058A1 (fr) | 2019-06-28 |
EP3698381B1 (fr) | 2021-08-25 |
FR3076058B1 (fr) | 2020-01-24 |
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