WO2023161592A1 - Device for improved fixing of a radioactive material transport package or its support frame to a transport system - Google Patents

Abstract

The invention relates to a device (14) for fixing a structure among a packaging for transporting radioactive materials and its support frame (8) to a transport system equipped with at least one fixing element (16), the device comprising a fixing member (26) intended to cooperate with the fixing element (16) provided on the transport system. According to the invention, the device has an adjustable character for adapting to the position of the structure (8) on the transport system, the device (14) comprising a blocking plate (34) arranged in a through opening (36) of a fixed part (24') of the device, the first opening having a first central axis (36a), the blocking plate (34) being designed so as to be able to be positioned in different positions within the opening (36) in order to bring a throughhole (38) into different positions relative to the first axis (36a).

Description

DESCRIPTION

TITLE: IMPROVED FASTENING DEVICE FOR A RADIOACTIVE MATERIAL TRANSPORT PACKAGING OR ITS SUPPORT FRAME, ON A TRANSPORT SYSTEM

TECHNICAL AREA

The present invention relates to the field of the transport of radioactive materials. It relates more particularly to the fixing of a container for transporting radioactive materials, or of its support frame, to a transport system.

PRIOR ART

Before being transported, a package must be fixed to its transport system, for example the platform of a trailer of a road transport vehicle. This fixing can be carried out by directly attaching the body of the package to the platform, or by fixing its support frame to this same platform.

To do this, the platform is equipped with fixing elements such as rails, threaded holes, etc., intended to cooperate with fixing devices present on the packaging or its support frame.

When mounting the packaging on the transport system, the removal must be carried out with great precision in order to match the fastening elements of the platform with the fastening devices of the packaging or its support frame. The precision required to obtain the desired cooperation complicates the assembly operations, and requires a non-negligible implementation time, especially when the transport system is not equipped with a device for centering the packaging or its chassis. support.

There is therefore a need to arrive at a solution making it possible to facilitate the assembly of the packaging on the transport system, in particular in order to reduce the time for implementation. DISCLOSURE OF THE INVENTION

The object of the invention is therefore to meet the need identified above. To do this, the invention firstly relates to a device for fixing a structure from among a container for transporting radioactive materials and its support frame, to a transport system equipped with at least one fixing element , the fixing device comprising a fixing member of the structure, intended to cooperate with the fixing element provided on the transport system.

According to the invention, the fixing device has an adjustable character to adapt to the position of the structure on the transport system, the adjustable fixing device comprising a blocking plate arranged in a first through opening of a fixed part of the fixing device, the first opening comprising a first central axis, the blocking plate comprising a passage hole through which the fixing member passes, and being designed so as to be able to be positioned in different positions within the first through opening , in order to bring the passage hole into different positions relative to the first central axis of the first opening.

The invention thus confers a simple design, which makes it possible to ensure the attachment of the structure to the transport system with a large relative positioning tolerance between this structure and the transport system. Placing the packaging on the transport system no longer needs to be extremely precise, which facilitates its implementation.

In addition, thanks to the adjustable nature of the fastening device, the proposed design makes it possible to adapt to transport systems having fastening elements according to various configurations, such as for example having fastening rails with spacings of different values.

The invention preferably has at least one of the following optional characteristics, taken individually or in combination.

Preferably, the blocking plate comprises a body as well as a secondary blocking plate arranged in a second through-opening of the body of the blocking plate, the second opening comprising a second central axis, the secondary blocking plate being traversed by the passage hole of the fixing member, and the secondary blocking plate being designed so as to be able to be positioned in different positions within the second through opening of the body of the blocking plate, in order to bring the passage hole into different positions relative to the second central axis of the second opening.

This configuration offers an even greater adaptation to the arrangement of the fastening elements provided on the transport system. In particular, with the two degrees of freedom conferred by this design, it is easily possible to adapt to the particular position of fixing elements of the point type, such as threaded holes, or even fixing elements bearing studs/rods threaded integral with the transport system.

According to a preferred embodiment of the invention, the first through-opening has a generally parallelepiped shape, and the blocking plate which only partially closes this first opening, can be brought into different positions within this first opening, in being moved relative thereto in a first direction.

According to another preferred embodiment of the invention, the first through opening has a generally circular shape centered on the first central axis of the first opening corresponding to a first adjustment axis of the adjustable fixing device, the blocking plate being designed to be positioned in different angular positions within the first through-opening, in relation to the first adjustment axis, in order to bring the passage hole, made eccentrically in relation to the first adjustment axis, into the different positions relative to this same first adjustment axis, the blocking plate preferably having a generally circular shape, of shape complementary to that of the first through-opening.

According to yet another preferred embodiment of the invention, the second through opening has a generally parallelepipedic shape, and the secondary blocking plate which only partially closes this second opening, can be brought into different positions within this second opening by being moved with respect thereto in a second direction, this second direction being different from the aforementioned first direction.

According to yet another preferred embodiment of the invention, the second through opening has a generally circular shape centered on the second central axis of the second opening corresponding to a second adjustment axis of the adjustable fixing device, the secondary blocking plate being designed to be positioned in different angular positions within the second through-opening, in relation to the second adjustment axis, in order to bring the passage hole, made eccentrically in relation to the second adjustment axis, into the different positions relative to this same second adjustment axis, the secondary blocking plate preferably having a generally circular shape, of shape complementary to that of the second through-opening.

Preferably, the adjustable fastening device also comprises a fastening sleeve passing through the passage hole, the sleeve itself being crossed by the fastening member. In addition, when the fastening element present on the transport system is a rail, the sleeve is preferably intended to be pressed against this fastening rail, which makes it possible to limit the opening of the rail during tightening.

Preferably, the locking plate ensures the locking of the fixed part, by shape cooperation with the first through opening, in at least one direction in a plane in which the fixed part is inscribed, orthogonal to the first central axis of the first through opening.

More precisely, there are two directions in the context of the embodiment with a circular plate described above, and a single direction for the embodiment with a sliding plate. In the latter case, other means are provided to ensure blocking in the sliding direction of the plate. Indeed, in this direction, there can for example be provided an interface between the fixed part and the blocking plate, with their respective surfaces comprising teeth/rack allowing fine adjustment of the position, as well as a recovery of the forces of slip, for example in the form of an anti-slip mat. Preferably, the blocking plate ensures the blocking of the fixed part, in a vertical direction of the fixing device, using abutment means carried by the blocking plate and cooperating with the fixed part. For example, these abutment means take the form of a shoulder on the plate.

Preferably, the fastening device also comprises a clamping member cooperating with a barrel of the fastening member, the latter preferably being a screw, and the clamping member a nut.

The invention also relates to a support frame for supporting a container for transporting radioactive materials, the support frame having a longitudinal direction, a transverse direction, and a vertical direction, the frame comprising: a support structure comprising:

- a support part intended to support the packaging,

- as well as a connection part intended to be fixed on a transport system, and a plurality of devices for fixing the connection part on the transport system, at least one of the fixing devices being adjustable and having the characteristics of the fixing device described above, also object of the invention.

Preferably, the fixing member of the adjustable fixing device comprises a head intended to cooperate with one of the fixing rails among two fixing rails fitted to the transport system, the two fixing rails being intended to be oriented parallel to the longitudinal direction of the frame, and the blocking plate of the adjustable fixing device being designed so as to be able to be positioned in different positions within the first through opening, in order to bring the passage hole into different positions relative to the first axis center of the first opening.

This makes it possible to control the spacing in said transverse direction between the passage hole and the first central axis of the first opening, in direction and/or in value, in order to match the passage hole with its associated rail.

Preferably, the frame comprises several adjustable fixing devices, and preferably at least two fixing devices spaced from each other in the longitudinal direction.

Preferably, the connection part of the support structure takes the form of a frame table, parallel to the two longitudinal and transverse directions.

The invention also relates to a container for transporting radioactive materials, the container comprising an outer body equipped with a plurality of devices for fixing this body to a transport system, at least one of the fixing devices being adjustable and having the characteristics of the fixing device described above, also object of the invention. All the characteristics mentioned above for the chassis are also applicable to the packaging.

The invention also relates to an assembly comprising:

- a radioactive material transport container;

- a support frame for this packaging;

- a transportation system;

- A plurality of fixing devices of the support frame on the transport system, at least one of the fixing devices being adjustable and having the characteristics of the fixing device described above, also object of the invention.

Preferably, the transport system comprises a platform on which are fixed fixing elements, preferably fixing rails.

The invention also covers a similar assembly, without the support frame, but with the packaging directly attached to the transport system, in an identical or similar manner.

Thus, the invention also relates to an assembly comprising:

- a radioactive material transport container;

- a transportation system; - a plurality of devices for fixing the packaging on the transport system, at least one of the fixing devices being adjustable and having the characteristics of the fixing device described above, also object of the invention.

Finally, the invention also relates to a method for mounting a structure from among a packaging for transporting radioactive materials and its support frame, on a transport system equipped with at least one fixing element, using at least one adjustable fastening device as described above, the method comprising the following steps:

- placing the structure on the transport system;

- adjustment of each adjustable fixing device, so as to align its through hole with its associated fixing element of the transport system.

Other advantages and characteristics of the invention will appear in the non-limiting detailed description below.

BRIEF DESCRIPTION OF DRAWINGS

This description will be given with regard to the appended drawings, among which;

[Fig 1] shows a side view of a vehicle for transporting radioactive materials, transporting an assembly according to the invention;

[Fig 2] shows a perspective view of a support frame of the packaging shown in Figure 1, equipped with several adjustable fastening devices, according to a preferred embodiment of the invention;

[Fig 3] is a top view of that of the previous figure;

[Fig 4] is a sectional view of the fastening device shown in Figures 2 and 3;

[Fig 5] is a top view of that of the previous figure;

[Fig 6] is a perspective view of the locking plate belonging to the fixing device shown in the previous figures;

[Fig 7] is a sectional view of the adjustable fastening device, according to another preferred embodiment of the invention, and taken along the line VII-VII of Figure 8;

[Fig 8] is a cross-sectional view taken along line VIII-VIII of Figure 7; [Fig 9] is a sectional view of the adjustable fastening device, according to yet another preferred embodiment of the invention;

[Fig 10] is a sectional view of the adjustable fastening device, according to yet another preferred embodiment of the invention;

[Fig 11] is a sectional view, showing an alternative for the realization of the adjustable fastening device;

[Fig 12]

[Fig 13]

[Fig 14] are sectional views showing other examples for the realization of the fixing elements on the transport platform of the vehicle; And

[Fig 15] shows a rear view of a package fixed to the platform of a vehicle, using the adjustable fixing devices shown in the previous figures.

DESCRIPTION OF EMBODIMENTS

With reference first of all to FIG. 1, there is shown a vehicle 1 for transporting radioactive materials, here a road transport vehicle, but it could alternatively be a rail transport vehicle.

The vehicle comprises a front traction unit 2, as well as a trailer 4 forming a transport system, with in particular the presence of a loading platform 6. On the platform 6, there is mounted a frame 8 supporting a packaging 10 for transporting radioactive materials. The fixing of the frame 8 on the platform 6 is removable, and specific to the present invention. It will thus be described in detail later.

The packaging 10, its support frame 8 and the transport system 4 form an assembly 15 also comprising several devices 14 for fixing the frame 8 to the platform 6, one or more of which are specific to the present invention, because of their adjustable nature which will be explained below.

In the preferred embodiment of FIG. 1, the fixing devices 14 cooperate with fixing elements provided on the platform 6, here fixing rails 16 arranged parallel to the longitudinal direction of the vehicle, and parallel to the longitudinal central axis 18 of the package 10 fixed to the platform. More specifically, these are four fixing devices 14, arranged in a square or rectangle, which are distributed so as to cooperate with two rails 16. Each fixing rail 16 thus cooperates with two devices 14 spaced from each other according to the longitudinal direction of the vehicle. Nevertheless, other types of fastening elements are possible on the platform 6, some of which will be described later.

Conventionally, the packaging 10 is formed by an outer body comprising a side body 12, a bottom, and a cover closing off an opening of the packaging axially opposite the bottom. The bottom and the lid are covered in FIG. 1 by two shock-absorbing covers 20, spaced from each other along the longitudinal central axis 18 of the packaging 10, which pass through the bottom and the lid. In this same figure 1, the packaging 10 is shown in the horizontal transport position, also called the "lying" position, in which its central longitudinal axis 18 is parallel to the platform 6 of the vehicle, and therefore parallel to the longitudinal axis of this last.

Still conventionally, the packaging 10 forms an outer envelope of a package and defines a cavity serving to house the radioactive materials, and possibly a storage basket. The radioactive materials can for example be waste casings, or nuclear fuel assemblies.

The support frame 8 on which the package 10 is mounted is shown in Figures 2 and 3. The frame has a longitudinal direction X intended to be parallel to the longitudinal central axis 18 of the package, as well as a direction transverse Y and a vertical direction Z, the three directions X, Y, Z being mutually orthogonal. This XYZ mark is the same that is attached to each fixing device 14, to the packaging 10, as well as to the platform 6 of the trailer.

The frame 8 comprises a support structure formed by two parts 22, 24 which are attached to one another using fastening means, such as bolts. Nevertheless, these two parts could be made in one piece, that is to say in one piece, without departing from the scope of the invention. It is first of all a support part 22, preferably in the form of a stool, whose upper plate 22a arranged in an XY plane is intended to support the side body of the packaging, in the direction Z. It is then a connection part 24 in the general shape of a plate, intended to be fixed on the platform 6 of the trailer via the fixing devices 14 which it incorporates at its four corners, respectively. The vertical plates of the support part 22 are fixed on the connecting part 24, which itself extends in an XY plane taking the form of a frame table.

Figures 4 to 6 show one of the fixing devices 14, with an adjustable character specific to the invention. This design can be adopted for all four devices 14, or for only part of them. In this case, preferably two of them are located on the same lateral side of the frame 8.

As emerges from what follows, the adjustable nature of the fixing device 14 results from the fact that it comprises a fixing member 26 which can be easily moved after the packaging and its frame have been placed on the platform, in order to match this fixing member 26 with its associated rail 16. Consequently, this removal can be carried out more easily, more quickly, and with less precision in the relative position of the frame 8 with respect to the rails 16 integrated into the platform 6.

The fixing member here is a screw 26, the head 28 of which is housed in the corresponding rail 16, and retained in the Z direction upwards by two abutment portions 30 opposite the bottom 32 of the rail, and arranged on either side. another of a screw barrel. It may be a rail of the Halfen™ rail type, the transverse spacing between the two vertical abutment portions 32 of which allows the insertion of the screw head 28 of parallelepipedal shape, which is then pivoted by 90° to be held vertically.

The fixing device 14 also comprises a blocking plate 34 arranged in a first through-opening 36 of a fixed part of this fixing device, this fixed part corresponding here to a corner portion 24' of the connecting part 24 in the form of plate. The first through-opening 36 comprises a first central axis 36a oriented in the direction Z. It is also equipped with an off-center passage hole 38, through which the shaft of the screw 26 passes. More specifically, in this preferred embodiment of the invention, the first through opening 36 has a generally circular shape centered on the first central axis 36a, corresponding to a first adjustment axis of the adjustable fastening device 14. The blocking plate 34 preferably also has a generally circular shape, of complementary shape to that of the first through-opening 36. This allows this plate 34 to be positioned in different angular positions within the first through-opening 36, in relation to the first adjustment axis 36a, in order to bring the eccentric passage hole 38 into different angular positions relative to this same first adjustment axis 36a. It is noted that in this embodiment, the screw is preferably in place in the rail before the positioning of the plate 34.

Also, thanks to this degree of freedom conferred by the rotational mobility of the plate 34 in the first through opening 36, it can easily be adopted the appropriate relative angular position of this plate to bring the screw 26 into correspondence with its associated rail 16 , so as to ensure the required assembly. This assembly, the outcome of which is shown in Figures 4 and 5, therefore begins with the removal of the frame 8 on the platform 6, the packaging being mounted on the frame only after the latter has been fixed on the platform. Then, the screw 26 is inserted into the rail 16, with the plate 34 removed from the frame 8, therefore by inserting the screw through the first through opening 36. The plate 34, in the general form of a cover or plate with preferably a handling handle 35, is then installed in its first opening 36, in the angular position which allows the insertion of the barrel of the screw 26 in the eccentric passage hole 38 of the plate 36. This adjustment of the angular position of the plate is well made to vertically align its through hole 38 with the fixing rail 16. Indeed, by angularly adjusting the position of the plate 34 around the first adjustment axis 36a, it is easily possible to control the spacing "E" in the Y direction between this axis 36a and the axis 38a of the passage hole 38, so that this axis 38a is found in correspondence with the rail 16, traveling between the two abutment portions 30 of this track. In this case, the blocking plate 34 is then removably mounted on the fixed part 24'. Nevertheless, in other configurations of the invention, the blocking plate 34 can be irremovably mounted on this fixed part 24' integrated into the frame, without departing from the scope of the invention.

Thanks to the shape cooperation between the side surface of the plate 34 and the corresponding surface of the first through opening 36, this plate ensures the blocking of the frame part 24 in the two directions X and Y.

In addition to this blocking in the XY plane conferred by the fixing device 14, the plate 34 is here also designed to ensure the blocking of the frame part 24 in the Z direction, using a shoulder 40 cooperating with the upper end of the first opening 36, as best seen in Figure 4.

In addition, a clamping member such as a nut 42 cooperates with the shaft of the screw 26, to clamp the locking plate 34 vertically between the rail 16 and this nut 42, thus forming a bolt with the screw 26. Nevertheless, it is noted that the fixing device 14 could only take up the forces of the frame 8 in the X and Y directions, the blocking of this frame in the Z direction being able to be carried out by other means.

Another preferred embodiment of the invention is shown in Figures 7 and 8. It differs from the previous mode in that the first through opening 36 has a generally parallelepipedic shape, just like the blocking plate 34. Nevertheless, the latter only partially closes the first opening 36, in order to be able to be brought into different positions within this first opening 36, by being moved relative to the latter in a first direction corresponding here to the Y direction, and thus to offer control easy positioning of the screw 26 relative to the rail 16, in order to put them in correspondence.

The width of the first opening 36 along the direction X corresponds to the length of the plate 34 along this same direction, so that the shape cooperation allows the forces of the frame 8 to be taken up along this direction X. Just as in the direction Z , via the nut 42 and the shoulder 40 which is formed in the upper part of the blocking plate 34. On the other hand, in the Y direction where this plate has a width less than the length of the first opening 36, there is for example provided an anti-slip interface between these two elements. This can be done by virtue of their respective surfaces comprising teeth or a rack allowing fine adjustment of the position of the plate 34 in the direction Y, while ensuring satisfactory recovery of the sliding forces of the chassis in this same direction.

In the two preferred embodiments which are the subject of FIGS. 9 and 10 and which will be described below, the design adopted allows an even finer adjustment of the fixing device 14, thanks to two degrees of freedom of movement to move the passage hole 38 of the screw 26. If these devices prove to be particularly suitable for an application with fixing elements of the point type platform, they can nevertheless be implemented with rails 16, as for the preferred embodiments previously described.

To do this, the blocking plate 34 is no longer made in one piece, but in two parts nested one inside the other. Indeed, the plate 34 comprises a body 34' which constitutes its main part, as well as a secondary blocking plate 34'' arranged in a second through-opening 46 of the body 34'. The second opening 46 comprises a second central axis 46a parallel to and distinct from the first central axis 36a. In addition, the secondary blocking plate 34" is traversed by the passage hole 38, centered on the parallel axis 38a and distinct from the axis 46a. This secondary blocking plate 34" can be mounted removable or not in its second opening 46 of body 34'.

More specifically, in the preferred embodiment of Figure 9, the second through opening 46 has a generally circular shape centered on the second central axis 46a, corresponding to a second adjustment axis of the adjustable fastening device 14. The locking plate secondary 34" also has a general circular shape, of complementary shape to that of the second through-opening 46. In this way, the secondary blocking plate 34" can be positioned in different angular positions within the second opening 46, in relative to the second adjustment axis 46a. This makes it possible to bring the eccentric passage hole 38 and the screw 26 into different angular positions relative to this same second axis. adjuster 46a. Also, thanks to these two degrees of freedom conferred by the rotational mobility of the body 34' of the plate 34 in the first opening 36 of the frame 8, and the rotational mobility of the secondary blocking plate 34" in the second opening 46 of the body 34', it is possible to bring the screw 26 into correspondence with its associated rail 16 or with any other fastening element, in particular of the point type, so as to ensure the required assembly.

According to a similar principle, in the preferred embodiment of Figure 10, the body 34 'of the plate 34 remains circular, but the second through opening 46 has a generally parallelepipedic shape, just like the secondary blocking plate 34 ” housed mobile in this opening. Nevertheless, the secondary plate 34” only partially closes the second opening 46, so that it can be brought into different positions within this second opening 46, by being moved relative to the latter in a second sliding direction De.

Here again, the double degree of mobility offered by the rotation of the body 34', and by the sliding of the secondary plate 34" in the body 34', makes it possible to bring the screw 26 precisely into correspondence with its associated rail 16 or with any other fastening element, in particular of the point type, so as to ensure the required assembly.

In other words, the embodiment of FIG. 10 corresponds to a combination of the two modes of FIGS. 4 and 7 described above. In this regard, it is noted that a combination of the two modes of Figures 7 and 10 can also be considered, so as to have the two degrees of sliding freedom in the XY plane, respectively in a first and a second distinct direction l each other.

Whatever the embodiment considered among all those described above, a fixing sleeve 48 can be housed in the passage hole 38, radially between the latter and the shaft of the screw 26. Such an embodiment is shown schematically in Figure 11 In this embodiment, the sleeve 48 itself has a passage hole 50 through which the shaft of the screw 26 passes, and this sleeve is centered in the passage hole 38. Thus, the sleeve is clamped vertically between the nut 42 and the abutment portions 30 of the rail 16, against which this sleeve 48 is pressed. This helps to limit the risks of opening of the rail 16 under the effect of the forces of the screw head 28 vertically upwards, by preventing the deformation of the two abutment portions 30 against which the screw head 28 is pressed. In other words, the two abutment portions 30, each extending longitudinally in the direction X, are clamped vertically between the screw head 28 and the lower part of the sleeve 48.

In addition, during the removal of the frame 8 on the platform 6, the blocking plate 34 can remain housed in the first opening 36, and once the removal is complete, the screw 26 can be introduced into the rail 16 passing through the enlarged passage hole 38. The sleeve 48 is then installed in a second step in the passage hole 38, just like the nut 42.

As mentioned above, the fixing elements 16 provided on the platform 6 can adopt different shapes, and are not limited to rails. By way of example, FIG. 12 represents a fixing element in the form of a threaded orifice 16 in the platform 6, and the screw 26 cooperates with this threaded orifice 16 by being screwed from above, the head 28 at the top. . Figure 13 shows a similar example, in which the fixing element takes the form of a passage hole 16 through the platform 6. The screw 26 is thus introduced from below, under the platform 6 and the head 28 in bottom, to be screwed onto the nut 42 in the upper part of the fastening device 14. FIG. 14 shows another example in which the fastening element is a weld 16 fixedly holding a threaded stud 26 projecting upwards on the platform 6, and whose upper free end cooperates with the clamping nut 42. Alternatively, the nut could be replaced by a through pin.

It is noted that all the preferred embodiments described above implement a support frame 8 to support the packaging 10. Nevertheless, another configuration of the invention is possible, in which the external body 12 of the packaging is fixed directly to the platform 6 of the trailer, via one or more adjustable fixing devices 14. In this case, the fixed part 24' of each device 14 is no longer integrated into the chassis which is no longer present, but it corresponds then to an extension of the lateral body 12 of the packaging, for example in the form of a tab extending radially in relation to the longitudinal central axis 18. All the characteristics of the devices 14, previously described for fixing the support frame 8, are applicable for the direct fixing of the packaging 10 on the platform 6, for example for the purpose of fixing the packaging 10 in a vertical position as this has been shown in Figure 15. Of course, various modifications can be made by those skilled in the art to the invention which has just been described, solely by way of non-limiting examples, and within the limit of the scope defined by the appended claims. In particular, the various embodiments can be combined with one another, their specific characteristics remaining in effect interchangeable and/or combinable.

Claims

1. Fixing device (14) of a structure among a packaging for transporting radioactive materials (10) and its support frame (8), on a transport system (6) equipped with at least one fixing element ( 16), the fixing device comprising a fixing member (26) of the structure, intended to cooperate with the fixing element (16) provided on the transport system, characterized in that the fixing device has an adjustable character to adapt to the position of the structure (8, 10) on the transport system (6), the adjustable fixing device comprising a blocking plate (34) arranged in a first through opening (36) of a part (24') of the fixing device, the first opening comprising a first central axis (36a), the blocking plate (34) comprising a passage hole (38) through which the fixing member (26) passes, and being designed so as to be able to be positioned in different positions within the first through opening (36), in order to bring the passage hole (38) in different positions relative to the first central axis (36a) of the first opening. 2. Fastening device according to claim 1, characterized in that the blocking plate (34) comprises a body (34') as well as a secondary blocking plate (34'') arranged in a second through opening (46) of the body of the blocking plate, the second opening comprising a second central axis (46a), the secondary blocking plate (34") being traversed by the passage hole (38) of the fixing member (26), and being designed so as to be able to be positioned in different positions within the second through opening (46) of the body of the blocking plate, in order to bring the passage hole (38) in different positions relative to the second central axis (46a ) of the second aperture. 3. Fastening device according to any one of the preceding claims, characterized in that the first through opening (36) has a generally parallelepipedic shape, and in that the blocking plate (34) which only partially closes off this first opening, can be brought into different positions within this first opening by being moved relative thereto in a first direction (Y). 4. Fastening device according to any one of claims 1 and 2, characterized in that the first through opening (36) has a generally circular shape centered on the first central axis of the first opening corresponding to a first adjustment axis ( 36a) of the adjustable fixing device, and in that the blocking plate (34) is designed to be positioned in different angular positions within the first through-opening (36), in relation to the first adjustment axis (36a), in order to bring the passage hole (38), made eccentrically in relation to the first adjustment axis (36a), into the different positions relative to this same first adjustment axis, the blocking plate (34) preferably having a generally circular shape, of complementary shape to that of the first through opening (36). 5. Fastening device according to any one of the preceding claims combined with claim 2, characterized in that the second through opening (46) has a generally parallelepiped shape, and in that the secondary blocking plate (34 ") which only partially closes off this second opening, can be brought into different positions within this second opening (46) by being moved relative thereto in a second direction (De). 6. Fastening device according to any one of claims 1 to 4, combined with claim 2, characterized in that the second through opening (46) has a generally circular shape centered on the second central axis of the second opening corresponding to a second adjustment axis (46a) of the adjustable fixing device, and in that the secondary locking plate (34") is designed to be positioned in different angular positions within the second through opening (46), in relation to the second adjustment axis (46a), in order to bring the passage hole (38), made eccentrically in relation to the second adjustment axis, into the different positions relative to this same second adjustment axis (46a), the plate secondary blocking (34 ") preferably having a generally circular shape, of complementary shape to that of the second through opening (46). 7. Fastening device according to any one of the preceding claims, characterized in that the locking plate (34) ensures the locking of the fixed part (24 '), by form cooperation with the first through opening (36), along at least one direction (X, Y) in a plane (XY) in which the fixed part (24') is inscribed, orthogonal to the first central axis (36a) of the first through opening (36). 8. Fixing device according to any one of the preceding claims, characterized in that the locking plate (34) ensures the locking of the fixed part (24 '), in a vertical direction (Z) of the fixing device, at using abutment means (40) carried by the blocking plate (34) and cooperating with the fixed part (24'). 9. Fastening device according to any one of the preceding claims, characterized in that it also comprises a clamping member (42) cooperating with a barrel of the fastening member (26), the latter preferably being a screw, and the tightening member (42) a nut. 10. Support frame (8) for supporting a radioactive material transport package (10), the support frame having a longitudinal direction (X), a transverse direction (Y), and a vertical direction (Z) , the chassis comprising: a support structure comprising: - a support part (22) intended to support the package (10); - a connecting part (24) intended to be fixed on a transport system (6), and a plurality of fixing devices (14) of the connecting part (24) on the transport system (6), at least one of the securing devices (14) being adjustable and having the features of any preceding claim. 11. Support frame according to claim 10, characterized in that the fixing member (26) of the adjustable fixing device (14) comprises a head (28) intended to cooperate with one of the fixing rails (16) among two fixing rails fitted to the transport system (6), the two fixing rails (16) being intended to be oriented parallel to the longitudinal direction (X) of the chassis, the blocking plate (34) of the adjustable fixing device (14) being designed so as to be able to be positioned in different positions within the first through opening (36), in order to bring the passage hole (38) in different positions relative to the first central axis (36a) of the first opening (36). 12. Packaging for transporting radioactive materials (10), the packaging comprising an outer body (12) equipped with a plurality of fixing devices (14) of this body (12) on a transport system (6), at the at least one of the attachment devices (14) being adjustable and having the features of any one of claims 1 to 9. 13. Set (15) comprising: - a container for transporting radioactive materials (10); - a support frame (8) for this packaging; - a transport system (6); - a plurality of fixing devices (14) of the support frame (8) on the transport system (6), at least one of the fixing devices (14) being adjustable and having the characteristics of any of the claims 1 to 9. 14. Set (15) comprising: - a container for transporting radioactive materials (10); - a transport system (6); - a plurality of fastening devices (14) of the packaging on the transport system (6), at least one of the fastening devices (14) being adjustable and having the characteristics of any one of claims 1 to 9. 15. Assembly according to claim 13 or 14, characterized in that the transport system comprises a platform (6) on which are fixed fixing elements (16), preferably fixing rails. 16. Method for mounting a structure from a radioactive material transport cask (10) and its support frame (8), on a transport system (6) equipped with at least one fixing element (16), using at least one adjustable fixation device (14) according to any one of claims 1 to 9, the method comprising the following steps: - removal of the structure (8, 10) on the transport system (6); - adjustment of each adjustable fixing device (14), so as to align its through hole (38) with its associated fixing element (16) of the transport system.