EP2798644A1

EP2798644A1 - Container for transporting and/or storing radioactive materials

Info

Publication number: EP2798644A1
Application number: EP12808832.5A
Authority: EP
Inventors: Didier VUILLERMOZ; Hervé ISSARD; Roger Lahille
Original assignee: TN International SA
Current assignee: TN International SA
Priority date: 2011-12-29
Filing date: 2012-12-26
Publication date: 2014-11-05
Anticipated expiration: 2032-12-26
Also published as: CN104067350B; JP2015508496A; KR102030766B1; CN104067350A; ES2571450T3; EP2798644B1; KR20140118997A; FR2985365A1; WO2013098287A1; JP6145456B2; FR2985365B1

Abstract

The invention relates to a thermal conductor (16) for an inter-wall space (14) of a lateral body of a container (2) for transporting and/or storing radioactive materials, the conductor (16) comprising a member (30) crossing the inter-wall space (14) and a connecting member (32) that bears against one (20) of the internal and external walls of the lateral body, the member (32) having points (36) for fastening to the wall (20) spaced apart from each other along a longitudinal direction of the conductor. According to the invention, the member (32) is split into segments along the longitudinal direction so as to define sections (32a) separated from each other by slits (40) arranged between the fastening points (36), each slit (40) extending through the strut member (30) and defining a closed end of this slit.

Description

PACKAGING OF TRANSPORT AND / OR STORAGE OF MATERIALS

RADIOACTIVE

DESCRIPTION

TECHNICAL AREA

The invention relates to the field of packaging for the transport and / or storage of radioactive materials, preferably of the type of irradiated nuclear fuel assemblies.

STATE OF THE PRIOR ART

Conventionally, to ensure the transport and / or storage of radioactive materials, it is used storage devices, also called "baskets" or "racks" storage. These storage devices, usually of cylindrical shape and of substantially circular or polygonal section, are able to receive the radioactive materials. The storage device is intended to be housed in the cavity of a package to form together with it a container for the transport and / or storage of radioactive materials, in which they are perfectly confined.

The aforesaid cavity is generally defined by a lateral body extending along a longitudinal axis of the package, as well as a bottom and a package cover arranged at opposite ends of the body, in the direction of the longitudinal axis. The lateral body comprises an inner wall and an outer wall, generally taking the form of two concentric metallic shells together forming an inter-wall annular space inside which thermal conductors are housed, as well as radiological protection means, in particular to form a barrier against neutrons emitted by the radioactive material housed in the cavity. This neutron shielding is conventionally carried out using a material called "resin concrete".

The thermal conductors make it possible to conduct the heat released by the radioactive materials towards the outside of the container, in order to avoid any risk of overheating which may cause degradation of these materials, an alteration of the mechanical properties of the materials constituting the packaging, or an abnormal pressure rise in the cavity.

Thermal conductors have been the subject of many developments, which have led to various achievements. One of the most commonly used resides in the placement of fins in the inter-wall space, so that their opposite ends are respectively in contact with the two rings in order to create thermal bridges. These fins, which extend in length in the direction of the longitudinal axis of the package, and allow to conduct the heat of the inner shell to the outer shell. Furthermore, in this embodiment, it is classically interposed radiological protection blocks between the fins in the inter-wall space of the lateral body.

More specifically, each thermal conductor comprises at least one member for traversing the inter-wall space, and at one end of this passage member, a first support member and fitting on one of the walls. inner and outer side packing body. Generally, at the other end of the conductor, there is provided a second support member and connector on the other of the two walls. Each support and coupling member also has a plurality of attachment points on its associated wall of the lateral packaging body, these attachment points usually taking the form of through holes for fixing screws on the walls of the body. lateral.

The thermal conductors and the walls of the lateral body are generally made of materials having different coefficients of thermal expansion. Indeed, the conductors are generally made of copper, aluminum or their alloys, and the inner and outer walls of steel. Consequently, the mounting made at the fixing points must be able to take into account the phenomena of differential thermal expansion between these elements, without generate mechanical stresses likely to alter their mechanical connection. Similarly, the assembly must avoid any deformation of the support member which could affect the good contact of this body with the wall on which it is attached, and thus compromise the heat transfer between the wall and the conductor. To do this, at each attachment point, there is generally provided an oblong hole through the support member and coupling, this hole being traversed by a screw housed in the relevant wall of the lateral body. Thanks to the oblong hole, by performing a weak tightening of the screw, a relative movement is allowed between the support member and its associated wall, which makes it possible to respond to the differential expansion stress.

Nevertheless, the low tightening of the screws is a limiting factor for heat transfer. Therefore, there is a need for optimization of current solutions, to improve the heat transfer function while allowing the differential thermal expansion of the elements involved.

DISCLOSURE OF THE INVENTION The object of the invention is therefore to remedy at least partially the disadvantages mentioned above, relating to the embodiments of the prior art.

To do this, the subject of the invention is a packaging for transporting and / or storing radioactive materials, comprising a lateral body equipped with an inner wall and an outer wall defining between them an inter-wall space in which is arranged at least one thermal conductor, the inner wall defining a housing cavity for the radioactive materials, said thermal conductor comprising at least one member for traversing the inter-wall space, and, at one end of this passage member a first support and coupling member on one of said inner and outer walls of the lateral packaging body, said first wall, said first support and coupling member having a plurality of first fixing points on the first wall of the lateral packaging body, said first fixing points being spaced from each other in a longitudinal direction of the thermal conductor.

According to the invention, said first support member and coupling member is segmented in said longitudinal direction, so as to define first segments spaced apart from each other by first slots arranged between said first attachment points, each first slot extending through said through member defining a closed end of said first slot.

With the proposed solution, the first segments can expand without constraint on either side of their attachment points, towards their ends, by consuming the width of the slots forming gaps between the segments.

In addition, the proposed solution no longer requires the presence of oblong holes as in the prior art, and above all allows a firm attachment of the attachment points on their respective walls, for obtaining a better heat transfer.

Advantageously, the invention is therefore no longer subject to the antagonistic effects resulting from the tightening of the screws at the attachment points, as was the case previously.

Preferably, the ratio between the width of each first slot and the length, in the longitudinal direction, of any one of the first two segments arranged on either side of this slot is between 0.005 and 0.1.

Preferably, each first slot extends through the passage member at a distance which represents 40 to 90% of the total width of the passage member in the direction of the slot.

Preferably, each first slot extends substantially orthogonal to the longitudinal direction of the thermal conductor. These slots could nevertheless be inclined differently, without departing from the scope of the present invention.

Preferably, said first support member and coupling member and said traversing member are each of substantially flat shape, parallel to the longitudinal direction. These two elements are preferably intersecting, for example forming a V with an internal angle of between 90 and 150 °.

Preferably, at the other end of said bushing member, there is provided a second support member, and possibly a coupling, on said other of said inner and outer walls of the lateral packaging body, said second wall. According to one embodiment envisaged, the second support member is in the continuity of said traversing member, sandwiched between two sectors of the second wall, here in general the outer wall of the main body.

In this embodiment, said second support member is segmented in said longitudinal direction, so as to define second segments spaced apart from each other by second slots each extending through said passage member defining a closed end of said second slot. This makes it possible to improve the behavior of the thermal conductor with regard to the mechanical stresses generated during the thermal expansions, in particular in the case where the first slots have only a short length on the traversing member.

In other words, these second slots provide more flexibility to the support member clamped between the sectors of the second wall, and thus improve the overall flexibility of the thermal conductor.

According to another embodiment, the second support member is supported on a surface of said second wall defining the inter-wall space, and possibly connected thereto. In this case, the conductor then preferably has a section in the overall shape of S or Z, with projecting angles between the traversing member and each of the two support members preferably between 90 and 150 °.

Here, the second support member is preferably segmented in said longitudinal direction, so as to define second segments spaced apart from each other by second slots each extending through said passage member defining a closed end of said second slot. Alternatively, the second support member could be continuous, that is to say without slot, without departing from the scope of the invention.

The second slot solution is in particular retained when the second support member has a plurality of second attachment points on the second wall of the packaging side body, said second attachment points being arranged between the second slots separating the second segments. . The benefit of these second slots is then comparable to that of the first slots, as described above. In the other case envisaged, where the second slots are made despite the absence of fixing points on the second support member, this also makes it possible to improve the behavior of the thermal conductor with regard to the mechanical stresses generated during thermal expansion. , especially in the case where the first slots would have only a short length on the traversing member. In other words, these second slots confer increased overall flexibility to the thermal conductor.

Whatever the chosen solution, with or without second fixing points provided on the second support member, the driver may comprise the following elements:

said traversing member;

said first support and coupling member;

said second support member;

- Another passage member secured to one of said first and second support members, the first or second slots of the support member extending through said other passage member defining a closed end of each of these slots; and

another first or second support member secured to said other through member, so that said elements together define a general form of Ω (uppercase omega), said other first or second support member being segmented according to said longitudinal direction, so as to define first or second segments spaced apart from each other, each first or second slot extending each through said other bushing member defining a closed end of said first or second slot.

This embodiment can therefore comprise either two first support members and a second support member, or two second support members and a first support member, these support members being in both cases connected by the two crossing bodies. In addition, the second support members may or may not have second attachment points, depending on the desired needs. Still with this particular design in which each first support member can be attached to the inner wall or the outer wall of the packaging side body, the shape of Ω (uppercase omega) is crossed by slots each running through a part of each of the two crossing members, through the support member which connects them. These slots thus take a general shape of U contributing to obtaining a great flexibility of the thermal conductor.

Preferably, the conductor has a generally undulating shape, with radially external peaks and alternately alternating radially internal peaks, the generally wavy shape defining:

external units oriented radially outwards between two radially inner ridges, each external pattern being made from a first or a second support member and with the aid of two traversing members; extending on either side of this support organ; and

- Internal patterns oriented radially inwardly between two radially outer peaks, each internal pattern being made from a first or a second support member and with the aid of two crossing members s' extending on either side of this supporting body,

each slot passing through the support member and a portion of each of the two members passing through its associated pattern.

This configuration is similar to the realization, in one piece, of several adjacent thermal conductors in the form of Ω such as that described above. Each conductor can thus extend in one piece over a large angular sector of the inter-wall annular space, for example over 45 ° to 180 °.

In the embodiments mentioned above, said first slots and said second slots alternate preferably alternately in said longitudinal direction. Nevertheless, other configurations can be envisaged in the distribution of the first and second slots, without departing from the scope of the invention.

Preferably, said first support and coupling member is mounted on the first wall, at said first attachment points, by screwed elements. or by welding. It is the same for the second attachment points when they are provided on the second support member and coupling.

Finally, said first wall of the lateral packaging body is preferably the inner wall, but could alternatively be the outer wall.

Other advantages and features of the invention will become apparent in the detailed non-limiting description below.

BRIEF DESCRIPTION OF THE DRAWINGS

This description will be made with reference to the appended drawings among which;

- Figure 1 shows a cross-sectional view of a container comprising a transport packaging and / or storage of radioactive material according to the invention; and

FIGS. 2 to 9 show various preferred embodiments for the thermal conductors fitted to the inter-wall space of the lateral body of the package shown in FIG. 1.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Firstly with reference to Figure 1, there is shown a container 1 for the transport and / or storage of nuclear fuel assemblies, preferably irradiated.

The container 1 generally comprises a packaging 2 object of the present invention, inside which there is a storage device 4, also called storage basket. The device 4 is intended to be placed in a housing cavity 6 of the package 2, as shown schematically in FIG. 1, in which it is also possible to see the longitudinal axis 8 of this package, coinciding with the longitudinal axes. storage device and the housing cavity.

Throughout the description, the term "longitudinal" should be understood as parallel to the longitudinal axis 8 and the longitudinal direction of the package. The container 1 and its device 4 forming receptive housing assemblies of nuclear fuel, are here shown in a horizontal position / lying usually adopted during the transportation of the assemblies, different from the vertical position of loading / unloading fuel assemblies.

In general, the package 2 essentially has a bottom (not shown) on which the device 4 is intended to rest in a vertical position, a lid (not shown) arranged at the other longitudinal end of the package , and a lateral body 10 extending around and along the longitudinal axis 8, that is to say in the longitudinal direction of the container 1.

It is this lateral body 10 which defines the housing cavity 6, and more particularly an internal wall 20 by means of a lateral internal surface 12 of substantially cylindrical shape and of circular section, and of axis coinciding with the axis 8.

Still with reference to FIG. 1, the design of the lateral body 10, which firstly has two concentric metal walls / ferrules jointly forming an inter-wall annular space 14 centered on the longitudinal axis 8 of packaging. It is indeed an inner wall / shell 20 centered on the axis 8, and an outer wall / shell 22 also centered on the axis 8.

The inter-wall space 14 is filled by radiological protection means 18 essentially designed to form a barrier against neutrons emitted by the fuel assemblies housed in the storage device 4. Thus, these elements are housed between the inner wall 20 whose inner surface corresponds to the lateral inner surface 12 of the cavity 6, and the outer wall 22. The radiological protection means 18 are made using a material known per se, such as a matrix composite material polymer, and more specifically whose matrix is a resin, preferably highly hydrogenated, for example of the vinylester resin type. This neutron protection material is also known as "resin concrete". It can also incorporate additives to make the composite material self-extinguishing. The means 18 are preferably made in the form of prefabricated blocks distributed in the circumferential direction in the annular space 14, and separated in pairs by thermal conductors 16 contacting each of the two walls 20, 22. These conductors 16, made in an alloy having good heat conduction characteristics, of the aluminum alloy or copper type, are specific to the present invention and will now be detailed with reference to FIGS. 2 to 9.

First of all, with reference to FIG. 2, there is shown a thermal conductor 16 according to a preferred embodiment, this conductor extending preferably over the entire length of the space 14 in the direction of the axis 8, or else alternately cut in the same direction.

In cross section, it has the overall shape of an S or Z stretched so that the two projecting angles that it defines are each between 90 and 150 °.

The conductor firstly has a member 30 for traversing the inter-wall space, this member 30 adopting a substantially planar shape of sufficiently large width to connect the two walls 20, 22 of the lateral packaging body. At its end located on the side of the inner wall, the lower end in Figure 2, there is provided a first member 32 for support and connection on the same wall.

Similarly, at the other end of the through member 30, there is provided a second member 34 for support and connection to the other wall of the lateral body, namely the outer wall.

The three members 30, 32, 34 are preferably made in one piece, respectively taking the form of three flat plates, all parallel to the direction of the axis 8, and together defining the two aforesaid projecting angles.

Each of the support members 32, 34 is intended to be in contact with its associated wall, preferably over its entire surface. In this embodiment, only the member 32 is also intended to be fixed by screws on the inner wall of the packaging body, with the aid of first fixing points 36, here taking the form of passage holes for the screws. mounting. The holes 36 are here preferentially circular, of diameter slightly greater than that of the fixing screws. They are spaced from each other in the direction of the axis 8, even if, possibly, several attachment points can be grouped together by being spaced transversely, that is to say spaced apart from each other in a direction perpendicular to that of the axis 8. Preferably, each of these groups has only two attachment points.

One of the peculiarities of the invention lies in the segmentation of the first support member 32 in the longitudinal direction, defining first segments 32a spaced from each other by first slots 40 arranged between said first attachment points. In practice, each segment 32a preferably has a single attachment point 36, or a single group of points in the sense mentioned above, centered on the segment 32a in the longitudinal direction.

Each slot 40 passes through the entirety of the support and coupling member 32, in order to define independent segments 32a, only connected two by two by a material ligament at the through member through which each slot 40 is prolonged. Indeed, each slot 40 has a first open end at the edge of the member 32, and a closed second end arranged at the passage member 30.

Each slot 40 thus has a shape of L, arranged in a plane orthogonal to the axis 8. The ratio between its width and the length, in the longitudinal direction, of any one of the first two segments 32a arranged on both sides. another of this slot 40 is between 0.005 and 0.1. In this regard, it is noted that the width of the slot 40 is for example of the order of 2 mm, with a pitch of the order of 100 to 150 mm in the longitudinal direction.

In addition, each slot 40 extends through the through member 30 at a distance that represents 40 to 90% of the total width of the through member in the slot direction, the length of the remaining material ligament. corresponding to 10 to 60% of the total width of this traversing member 30.

In FIG. 3, there is shown a similar conductor, in which the first support and connecting member 32 is intended to be fixed on the outer wall of the side body packing. Therefore, the second support member 34 is here intended to be simply in contact with the inner wall.

The embodiments shown in Figures 4 and 5 are derived from that of Figure 2, with a second support member 34 which is shaped similarly to that of the first member 32. In other words, it is here provided the segmentation of the second support member 34 in the longitudinal direction, so as to define second segments 34a spaced from each other by second slots 42.

Each slot 42 passes through the entirety of the support and connecting member 34, to define independent segments 34a, only connected two by two by a material ligament at the through member 30 through which each cleft 42 goes on. Indeed, each slot 42 has a first open end at the edge of the member 34, and a closed second end arranged at the passage member 30.

Again, each slot 40 has an L shape, arranged in a plane orthogonal to the axis 8, with dimensions and ratios similar to those described for the first slots 40.

In this regard, it is noted that the first and second slots 40, 42 are in separate planes, preferably being arranged alternately, with the possibility of providing a plurality of first slots 40 arranged between two second slots 42 directly. consecutive, or vice versa.

In the two modes shown in FIGS. 4 to 5a, the first and second slots 40, 42 extend sufficiently deep through the through member 30 to provide a lap region 46, when viewed in the direction of the axis 8. Thus, with regular alternation of the first and second slots, and a regular spacing therebetween, the traversing member 30 adopts the general shape of a square sinusoidal.

In FIG. 4, the second segmented member 34 is intended to be only resting on its associated wall of the lateral packaging body, whereas in the mode of FIGS. 5 and 5a, a connection on this same wall 22 is provided by the second fixing points 48 similar to the first points 36. In practice, each segment 34a preferably has a single second attachment point 48, or a single group of points in the above-mentioned sense, centered on the segment 34a in the longitudinal direction.

In FIG. 5a, it is shown that the thermal conductors 16 follow each other in the circumferential direction in the inter-wall space 14, these conductors preferably being all identical and separated by the presence of the prefabricated neutron protection blocks (not shown). .

In addition, it is noted that to minimize the concentration of stresses at the closed ends of the slots 40, 42, these ends have a rounded shape with a diameter greater than the width of these same slots.

In this FIG. 5a, just as in FIG. 8 which will be described later, some of said fastening screws have also been shown through the points 36, these screws being referenced 37.

Referring now to Figures 6-7, two other preferred embodiments have been shown. These are embodiments in which the second support member and connector 34 is distinct from that shown in Figures 2 to 5, since it is here in the continuity of the passage member 30, c that is to say in the same plane as the latter, because it is intended to be sandwiched between two consecutive angular sectors 22a of the outer wall 22. This arrangement is shown in FIG. 6a, showing two welded wall sectors 22a and enclosing the song of the second organ 34.

In the embodiment of FIG. 6, the first slots 40 are substantially identical to those of the preceding modes, or even extend to the level of the opposite support member 34, which is not segmented. It is however segmented in the other mode of Figure 7, so as to define second segments 34a spaced from each other by second slots 42 substantially straight. Each slot 42 passes through the entire bearing and connecting member 34, in order to define independent segments 34a, only connected two by two by a material ligament at the passage member 30 to through which each slot 42 is extended. Indeed, each slot 42 has a first open end at the edge of the organ 34, and a second closed opposite end arranged at the through member 30. Here too, the first and second slots 40, 42 are in separate planes, preferably being arranged alternately, with always the possibility of providing several first slots 40 arranged between two second slots 42 directly consecutive, or vice versa.

The first and second slots 40, 42 extend sufficiently deep through the traversing member 30 to present an overlap area 46, when viewed in the direction of the axis 8.

The preferred embodiment shown in FIG. 8 shows thermal conductors 16 in the general form of Ω (uppercase omega). Here, it is a matter of two first support and connecting members 32 fixed on the inner wall 22, a second support member 34 intended to contact the outer wall of the packaging body, and two 30 directly consecutive passage, connecting the support members 32, 34. Naturally, the first members 32 could be fixed on the outer wall, and / or it could alternatively be provided two second members 34 and a single first member 32.

Each conductor 16 of FIG. 8 is then in the form of a conductor as shown in FIG. 4, to which is added another bushing member 30, as well as another first member 32 at the inner radial end. of this other crossing member 30.

In addition, the slots 42 of the second member 34 extend through the new through member 30, so that these slots 42 and each take the general shape of a U through a portion of each of two through members 30, through the second support member 34 which connects them. The length of the slot 42 is preferably identical at each of the two crossing members 30.

In addition, the first member 32 added is also segmented in a manner analogous to that of the other first member 32, again so as to define segments separated by slots 40 extending into the added through member 30. Here , it is ensured that the first slots 40 of the two members are located two to two in identical planes orthogonal to the axis 8. A longitudinal offset could alternatively be provided between these slots 40, without departing from the scope of the invention.

In addition, even if a regular alternation is possible between the slots 40, 42, it is here made so that two first directly consecutive slots 40 in the direction of the axis 8 are separated by two second slots 42 directly consecutive according to this same direction.

Finally, the last embodiment shown in FIG. 9 is similar to the one-piece construction of several conductors 16 of the type shown in FIG. 8, with the first slots 40 of the adjacent conductors which would be located in the continuity of each other, which is not necessarily the case in the embodiment of this Figure 8.

Indeed, in the latter mode where the conductor 16 has a generally corrugated shape, there is provided an alternation in the circumferential direction of first and second support members 32, 34, which are connected in pairs by traversing members 30. Each conductor 16 extends in one piece over an angular sector of the inter-wall annular space, for example over 45 to 180 °. In addition, each support member 32, 34 is fixed to its respective wall of the lateral body by attachment points 36, 48, even if alternatively, the second members 34 could be in contact only with the outer wall or the wall. internal of the lateral body.

The corrugated shape defines radially external crests and alternately alternating radially internal crests, which are respectively formed by the second support members 34 and the first support members 32.

It is therefore possible to discern radially outwardly oriented external patterns between two radially inner ridges 32, 32, each external pattern then being made from a second support member 34 as well as with the aid of the two bushing members 30 extending on either side of this support member 34. These external patterns preferably take the general form of a U open towards the inside. In the same way, it is possible to discern radially inwardly oriented internal patterns between two radially outer peaks 34, 34, each internal pattern being made from a first support member 32 and the help from two traversing members 30 extending on either side of this support member 32. These internal patterns preferably take the general form of an open-out U, implying that an external pattern and an internal pattern directly consecutive share a same crossing member 30, forming a branch common to both U.

Furthermore, each first and second slot 40, 42 extends in a manner analogous to that of the slots 42 of the embodiment of FIG. 8, namely that it passes through a portion of each of the two bushing members 30. its associated pattern, in addition to the support member connecting these two members 30.

The slots 40, 42 are thus all U-shaped, and arranged alternately in the longitudinal direction, even if other distributions are possible, such as that shown on each thermal conductor 16 of FIG. 8.

Of course, various modifications may be made by those skilled in the art to the invention which has just been described, solely by way of non-limiting examples.

Claims

1. Packaging (2) for transporting and / or storing radioactive materials comprising a lateral body equipped with an inner wall (20) and an outer wall (22) defining between them an inter-wall space (14) in which at least one thermal conductor (16) is arranged, the inner wall (20) defining a cavity (6) for accommodating the radioactive materials, said thermal conductor (16) comprising at least one member (30) for traversing the space inter-wall (14), and at one end of this bushing member, a first member (32) for support and connection to one of said inner and outer walls of the lateral packaging body, said first wall, said first support and coupling member (32) having a plurality of first attachment points (36) on the first wall of the packaging side body, said first attachment points being spaced from each other in accordance with a first longitudinal direction of the thermal conductor,

characterized in that said first support and coupling member (32) is segmented in said longitudinal direction, so as to define first segments (32a) spaced from each other by first slots (40) arranged between said first points fastener (36), each first slot (40) extending through said through member (30) defining a closed end of said first slot.

2. Packaging according to claim 1, characterized in that the ratio between the width of each first slot (40) and the length, in the longitudinal direction, of any one of the first two segments (32a) arranged on both sides. other of this slot, is between 0.005 and 0.1.

3. Packaging according to claim 1 or claim 2, characterized in that each first slot (40) extends through the traversing member (30) at a distance which represents 40 to 90% of the total width of the traversing member in the direction of the slot.

4. Packaging according to any one of the preceding claims, characterized in that each first slot (40) extends substantially orthogonal to the longitudinal direction of the thermal conductor.

5. Packaging according to any one of the preceding claims, characterized in that said first support member (32) and coupling and said bushing member (30) are each substantially planar, parallel to the longitudinal direction.

6. Packaging according to any one of the preceding claims, characterized in that at the other end of said bushing member (30), there is provided a second member (34) for support, and possibly coupling, on said other of said inner and outer walls of the lateral packaging body, said second wall.

7. Packaging according to claim 6, characterized in that the second member (34) of support is in the continuity of said passage member (30), sandwiched between two sectors (22a) of the second wall (22).

8. Package according to claim 7, characterized in that the second support member (34) is segmented in said longitudinal direction, so as to define second segments (34a) spaced apart from each other by second slots (42). each extending through said through member (30) defining a closed end of said second slot.

9. Packaging according to claim 6, characterized in that the second member (34) bears against a surface of said second wall (22) defining the inter-wall space, and possibly connected thereto.

Pack according to claim 9, characterized in that the second support member (34) is segmented in said longitudinal direction, so as to define second segments (34a) spaced from each other by second slots (42). each extending through said through member (30) defining a closed end of said second slot.

Pack according to claim 10, characterized in that the second support member (34) has a plurality of second attachment points (48) on the second wall (22) of the packaging side body, fixing being arranged between the second slots (42) separating the second segments (34a).

12. Package according to claim 10 or claim 11, characterized in that the thermal conductor comprises:

- said traversing member (30);

- said first member (32) for support and connection;

said second support member (34);

- Another bushing member (30) integral with one of said first and second bearing members (32, 34), the first or second slots of (40, 42) this support member extending through the other bushing member (30) defining a closed end of each of said slots; and

another first or second support member (32, 34) integral with said other traversing member (30), so that said elements together define a general shape of Ω, said other first or second support member (32, 34) being segmented in said longitudinal direction, to define first or second segments (32a, 34a) spaced from each other, each first or second slot (40, 42) extending each through said other member bushing (30) defining a closed end of said first or second slot.

13. Packaging according to claim 12, characterized in that the thermal conductor has a generally wavy shape, with ridges radially external and alternately alternating radially internal crests, the generally wavy shape defining:

external radially outwardly oriented patterns between two radially inner ridges, each external pattern being made from a first or a second support member (32, 34) and with the aid of two traversing members (30) extending on either side of this support member; and

- Internal patterns oriented radially inwardly between two radially outer peaks, each internal pattern being made from a first or a second support member (32, 34) and with the aid of two traversing members (30) extending on either side of this support member,

and in that each slot (40, 42) passes through the support member (32, 34) and a portion of each of the two through members (30) of its associated pattern.

14. Package according to any one of claims 8 and 10 to 13, characterized in that said first slots (40) and said second slots (42) succeed each other alternately in said longitudinal direction.

15. Package according to any one of the preceding claims, characterized in that said first member (32) for support and connection is mounted on the first wall, at said first attachment points (36), by screwed elements. (37) or by welding.

16. Packaging according to any one of the preceding claims, characterized in that said first wall of the lateral packaging body is the inner wall (20).