EP2140460B1 - Container for transporting and/or storing nuclear material, said container including a mobile heat-conducting structure - Google Patents
Container for transporting and/or storing nuclear material, said container including a mobile heat-conducting structure Download PDFInfo
- Publication number
- EP2140460B1 EP2140460B1 EP08736305.7A EP08736305A EP2140460B1 EP 2140460 B1 EP2140460 B1 EP 2140460B1 EP 08736305 A EP08736305 A EP 08736305A EP 2140460 B1 EP2140460 B1 EP 2140460B1
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- EP
- European Patent Office
- Prior art keywords
- storage space
- space device
- package
- mobile
- heat conduction
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
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- 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
- G21F5/005—Containers for solid radioactive wastes, e.g. for ultimate disposal
- G21F5/008—Containers for fuel elements
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- 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
- G21F5/10—Heat-removal systems, e.g. using circulating fluid or cooling fins
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
- F24F2013/0608—Perforated ducts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F2013/1493—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre using an elastic membrane
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/14—Details or features not otherwise provided for mounted on the ceiling
Definitions
- the present invention relates generally to the field of transport and / or storage of nuclear materials, such as assemblies of nuclear fuel, and in particular fresh fuel, for example of the Mox type.
- storage devices are used, also called “basket” or “rack” storage.
- These storage devices usually of cylindrical shape and of substantially circular section, have a plurality of adjacent housings each adapted to receive a nuclear fuel assembly.
- 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 nuclear fuel assembly, wherein the nuclear material is perfectly confined.
- the storage device is generally removable. In other words, it is designed to make it easy and easy to load into the cavity of the package. An operating clearance is thus provided between the cavity of the package and the storage device to allow these loading / unloading operations of the basket.
- the mechanical strength of the basket must be compatible with the regulatory safety requirements for the transport / storage of nuclear material, in particular with regard to so-called free fall tests.
- the mechanical characteristics of the materials used for the manufacture of the basket can degrade significantly depending on the temperature, particularly when these materials are aluminum or one of its alloys. Heat evacuation between the basket and the packaging is therefore also sought so as to ensure satisfactory mechanical strength of the basket.
- the inner side surface defining the cavity of the package is made with wide manufacturing tolerances.
- One of the disadvantages resulting from the use of wide manufacturing tolerances lies in the need to substantially increase the clearance usually provided to make it possible and easy to load a removable basket into the cavity of the package, as mentioned previously. .
- the observed play then performs a thermal insulating role going against the desired overall goal of thermal conduction between the basket and the package, and thus makes it difficult to evacuate the heat generated by the nuclear fuel assemblies.
- the invention therefore aims to overcome the disadvantages mentioned above, relating to the achievements of the prior art.
- the invention firstly relates to a storage device for transport and / or storing nuclear material, such as nuclear fuel assemblies, preferably fresh, comprising a main structure defining at least one housing for containing said nuclear material, the device also comprising a movable thermal conduction structure forming at least one part of a lateral outer surface of said storage device, said mobile thermal conduction structure comprising at least one movable thermal conduction member mounted on said main structure so as to be reversibly movable from a retracted position to a deployed position away from said main structure.
- nuclear material such as nuclear fuel assemblies, preferably fresh
- the storage device or storage basket according to the invention therefore presents in an original manner a deployable character allowing it to substantially increase the contact surfaces with the inner lateral surface of the package, delimiting the cavity in which is located the basket.
- the heat transfer between the basket and the packaging is thus satisfactorily provided, without requiring the use of narrow and expensive manufacturing tolerances for the realization of the inner lateral surface delimiting the cavity. Indeed, even if the use of wide manufacturing tolerances leads to consider greater play between the package and the basket that usually provided to allow the loading of the latter, once it housed inside of the cavity, the thermal conduction structure can then to be deployed in order to obtain the desired contact surface between the basket and the cavity of the package, which limits or even completely eliminates the previously discussed adverse effects relating to the presence of the initial high clearance forming thermal insulation.
- the heat removal function provided by the thermal conduction structure in the deployed position makes it possible to meet the maximum temperature criterion allowed for the fuel assemblies, or for all the other types of nuclear material intended to be stored / transported. Consequently, with the configuration according to the invention, the risks of degradation of the protective sheaths of the assemblies and their risk of mechanical weakening are advantageously reduced to nothing.
- the reduction of the overall temperature within the storage basket, permitted by the thermal conduction structure advantageously generates an increase in the service life of this basket, particularly when it is made of aluminum or in one of its alloys.
- the temperature reduction also contributes to justify more easily the mechanical behavior of the basket, especially during the free fall tests.
- the heat conduction structure is preferably deployed until contact is made with the cavity of the package, it is also possible to envisage a smaller deployment, not leading to contact. above, without departing from the scope of the invention. Indeed, a simple deployment of the thermal conduction structure has the advantageous consequence of reducing the clearance initially provided between the basket and the packaging, so that the heat transfer between these two elements is substantially improved.
- the latter can be later returned to its retracted position, in particular to facilitate the extraction of the basket out of the package.
- the sum of the lengths of each movable element of the mobile structure traversed, according to the longitudinal axis of the storage device represents at least 20% of a total length of said storage device along its longitudinal axis.
- At least one movable element is articulated on said main structure, along an axis of articulation parallel to a longitudinal axis of said storage device.
- This design is perfectly suited to obtaining a longitudinal linear contact between the movable element and the packaging cavity.
- the hinge axis passes through a peripheral portion of said main structure.
- the lateral outer surface of at least one movable element takes the form of an angular portion of a cylindrical surface of longitudinal axis parallel to a longitudinal axis of said storage device said angular portion being less than or equal to 180 °.
- the movable elements can participate in the formation of a lateral outer surface of the storage device of substantially cylindrical shape, and preferably of circular section.
- At least one movable element is articulated on said main structure at a longitudinal edge of this element.
- said mobile structure has a plurality of movable thermal conduction elements, distributed peripherally.
- these in the retracted position of each of said plurality of mobile thermal conduction elements, these form a peripheral envelope around said given longitudinal portion.
- the aforementioned envelope may alternatively not be entirely formed by the plurality of movable elements, but also with the aid of fixed elements relative to the main structure, for example each placed between two consecutive movable elements in the peripheral direction.
- said peripheral envelope of the given longitudinal part is constituted by two, three or four mobile thermal conduction elements, even if the number of these elements could be greater, without departing from the scope of the invention.
- said mobile thermal conduction structure comprises a plurality of movable thermal conduction elements distributed along a longitudinal direction of the storage device.
- This preferred feature highlights the "cut" nature of the movable structure in the longitudinal direction of the storage device. Nevertheless, it would alternatively be possible to provide that each movable element extends over substantially the entire length of the thermal conduction structure in the direction of the longitudinal axis of the storage device, without departing from the scope of the invention.
- each element of said mobile thermal conduction structure forms substantially the entirety of the lateral outer surface of said storage device.
- it reflects the fact that the entirety of the main structure is "covered” laterally by the mobile structure, although it could be otherwise, without departing from the scope of the invention.
- it can be provided that only the upper and lower ends of the basket are not covered by the deployable structure of thermal conduction.
- At least one movable thermal conduction member is biased towards its retracted position or towards its deployed position by elastic return means, for example of the spring type.
- the storage device comprises control means for generating the displacement of each movable thermal conduction element from its retracted position to its deployed position, and vice versa, said control means being operable from outside the storage device and more preferably operable externally from an upper end of the storage device.
- said control means comprise a control rod passing through said main structure parallel to a longitudinal axis of said storage device.
- said control means comprise a control member operable from a head plate of the storage device.
- the storage device applies preferentially to transport and / or storage of fresh nuclear fuel assemblies, for example of the Mox type.
- Another object of the present invention relates to a package comprising a housing cavity of a storage device for transporting and / or storing nuclear material, said package comprising a main structure and said housing cavity being delimited by a lateral inner surface. said package.
- the packaging also comprises a mobile thermal conduction structure forming at least a part of said inner lateral surface of the package, said mobile thermal conduction structure comprising at least one mobile thermal conduction element mounted on said structure primary so as to be releasably movable from a retracted position to an extended position approaching a longitudinal axis of said housing cavity.
- the advantages described above relating to the storage device according to the present invention characterize analogously the packaging according to the invention, since the common concept between these two entities lies in the provision of a conduction structure deployable thermal system to improve the heat transfer between the basket and the packaging, establishing a contact between these two entities, or, as mentioned above, by simply reducing the clearance initially provided between these two elements.
- the structure thermal conduction can then be deployed to increase the contact surfaces with the storage basket, which limits or even eliminates the adverse effects previously discussed relating to the presence of the initial large game forming thermal insulation.
- the sum of the lengths of each movable element of the mobile structure traversed, according to the longitudinal axis of said housing cavity represents at least 20% of a total length of said housing cavity along its longitudinal axis.
- At least one movable element is articulated on said main structure of the package, along an axis of articulation parallel to the longitudinal axis of said housing cavity.
- said hinge axis passes through an inner peripheral portion of said main structure of the package.
- the lateral inner surface of at least one movable element takes the form of an angular portion of a cylindrical surface having a longitudinal axis parallel to the longitudinal axis of said housing cavity, said angular portion being less than or equal to at 180 °.
- At least one movable element is articulated on said main structure of the package at a longitudinal edge of this element.
- said movable structure has a plurality of movable thermal conduction elements, distributed peripherally, and thus serving to delimit the housing cavity.
- movable thermal conduction elements Preferably, in the retracted position of each of said plurality of movable thermal conduction elements, these form a portion of a peripheral ring disposed internally with respect to said given longitudinal portion.
- said peripheral ring portion is constituted by two, three or four mobile thermal conduction elements.
- said mobile thermal conduction structure comprises a plurality of movable thermal conduction elements distributed along a longitudinal direction of the housing cavity.
- At least one movable thermal conduction element is held in its retracted position or in its deployed position by elastic return means.
- control means for generating the displacement of each movable thermal conduction member from its retracted position to its deployed position, and vice versa, said control means being operable from outside the package and more preferably operable externally from an upper end of the package.
- control means comprise a control rod passing through said main structure of the package, parallel to the longitudinal axis of said housing cavity.
- Another object of the present invention relates to a container for the transport and / or storage of nuclear material, this container comprising a package and a storage device removably placed in said package, said package being a package such that described above, and / or said storage device being a storage device as described above.
- the invention relates to a container for the transport and / or storage of nuclear material, this container comprising a package and a storage device removably placed in said package, and a movable structure of thermal conduction comprising at least one movable thermal conduction member arranged to be releasably movable from a retracted position to an extended position to reduce the clearance between the storage device and the package, or to both of these components mutually in contact, the mobile thermal conduction structure indifferently part of the storage device and / or packaging.
- the invention also relates to a method of loading a storage device as described above in a package so as to form a container for the transport and / or storage of nuclear materials, the method comprising a step introducing said storage device into a cavity defined by the package by means of an inner side surface thereof, characterized in that it also comprises a subsequent step of deploying said mobile structure of thermal conduction.
- this deployment is carried out so that each mobile thermal conduction member of said mobile structure comes into contact with said inner lateral surface delimiting said cavity of the package.
- a storage device 2 for the transport and / or storage of nuclear fuel assemblies, according to a preferred embodiment of the present invention.
- the storage device 2 is intended to be placed in a package (not shown in this figure) intended for the transport and / or storage of nuclear fuel assemblies (not shown), preferably fresh, for example of the Mox type.
- the storage device 2 comprises a plurality of adjacent housings L arranged in parallel, the latter each extending along a longitudinal axis of housing 3, parallel to a longitudinal axis 4 of the device / basket 2.
- the housings L are defined by a structure main 5 of the basket, also called central structure, and are each adapted to receive at least one fuel assembly of square or rectangular section, and preferably only one. They are each delimited by an inner surface, the cross section of which preferably takes the form of a square or a rectangle.
- the design of the main structure 5 of the storage device 2 may be of any form known to those skilled in the art, such as for example the type based on the stack of slabs traversed by housing delimiting folders, or of the type intended to obtain the housing L juxtaposed to each other through a plurality of structural assemblies with stacked and interlocking notches.
- the storage device 2 is shown in a vertical loading / unloading position of the fuel assemblies, different from the horizontal / recumbent position usually adopted during the transportation of the assemblies. Indeed, as is known to those skilled in the art, these assemblies are intended to be previously introduced into the housing L with the device 2 arranged vertically, namely resting on a bottom 6 located at one end of the device opposite to that bearing a head plate 11, through which the assemblies pass before entering their respective homes.
- the storage basket 2 comprises a lateral outer surface 7, a large part of which is constituted by the lateral outer surface 12 of mobile elements 10 belonging to a mobile thermal conduction structure 8, which will be detailed below. Indeed, in the preferred embodiment described, this results in the fact that almost all of the main structure 5 is covered laterally by the movable structure 8, since only the upper 14 and lower 16 ends of the basket 2 are not not covered by the moving elements of thermal conduction 10.
- the number of sections could be different, depending on the needs and constraints encountered.
- the structure 8 comprises two movable elements 10 distributed angularly / peripherally, and each extending over an angular sector of about 180 ° to jointly constitute a peripheral envelope around the longitudinal portion concerned 18a-18c, and this when the movable elements 10 occupy a retracted position as will be described later.
- the three peripheral envelopes thus formed are adjacent in the longitudinal direction of the basket 2, and can therefore be likened to one and the same substantially continuous envelope, extending all around the main structure 5, and substantially over almost the entire basket length 2.
- the ratio 3.11 / 12 is preferably identical regardless of the longitudinal half-section considered, which reflects the fact that the deployable structure 8 has a constant length all around the main structure 5.
- each of the two movable elements 10 is hingedly mounted on the main structure 5, along an axis of articulation 20 parallel to the axis 4.
- this hinge pin 20 is preferably placed so that it is located at an articulated longitudinal edge 22 of the element, and so that it passes through a peripheral portion 24 of the main structure 5, as is clearly visible on the figure 3 .
- each of the two movable elements 10 takes the form of an angular portion of a cylindrical surface, of circular section and of a longitudinal axis parallel to the longitudinal axis 4, and preferably coincides with the latter when the movable member 10 occupies its retracted position shown.
- the angular portion is of the order of 180 °, which allows the two elements 10 to jointly form a closed envelope around the longitudinal section considered, whose lateral outer surface 12 constituting a part of the lateral outer surface 7 of the basket 2, takes the form of a cylindrical portion of circular section.
- the two hinged longitudinal edges 22 are substantially placed facing one another, and are therefore arranged diametrically opposite to the two longitudinal free edges 26 of the two movable elements.
- the two longitudinal free edges 26 are also substantially placed opposite one another, and possibly in contact.
- each of the two movable thermal conduction elements 10 is mounted on the main structure 5 so as to be able to be moved from the retracted position to a deployed position which will be described below. , away from the main structure 5, namely away from the axis 4 by pivoting along its hinge axis 20.
- the intermediate longitudinal section 18b has been represented with only a part of its two associated moving elements, in order to better understand the design of the main structure 5, and to reveal a part of the control means allowing the moving elements of thermal conduction 10 to move.
- the main structure 5 comprises transverse slats 30 spaced longitudinally from each other, their periphery jointly forming a single circumferential bearing surface of cylinder shape and circular section, intended to be married by a lateral inner surface of the associated mobile element 10, in the retracted position.
- the annular spaces 35 situated between two directly consecutive transverse slabs 30 are filled by semi-annular elements 36, each preferably taking the form of a half-ring of substantially square or rectangular cross-section, these elements 36 forming an integral part of the elements. mobile 10, as will be discussed below.
- each section 18a-18c six annular spaces 35 are left free to be penetrated respectively by the six semi-annular elements 36 of the mobile elements 10. It is noted that these elements 36 participate strongly in the heat transfer between the movable element 10 and the main structure 5, at its wafers 30, this thermal transfer to improve the heat transfer between the basket and the cavity. For this, the required operating clearance between wafers 30 and the semi-annular elements 36 is set to be as small as possible.
- this element can be roughly realized by means of a hollow cylinder portion 38 defining the lateral outer surface 12 and extending over approximately 180 °, on which are reported six elements 36 each forming an internal portion of the element mobile 10 associated.
- the inner portions 36 are then preferably of the same longitudinal axis, also corresponding to the longitudinal axis of the hollow cylinder portion 38.
- each section 18a-18c two of the six annular spaces 35, left free to be penetrated by the internal portions 36, house a part of the control means for the setting in motion of these elements, as will now be be detailed with reference to Figures 4 to 7 .
- the control means firstly comprise a control rod 40 passing through the main structure 5 parallel to the longitudinal axis 4, this control rod 40 being situated generally between the free longitudinal edges 26 of the mobile elements 10, as this is the case. better visible on the figure 3 .
- the rod 40 extends substantially the entire length of the basket 4, crossing a periphery of the wafers 30, as is visible on the figure 6 .
- the rod 40 carries an actuatable control member 42 arranged externally relative to the basket, and more precisely mounted on the head plate 11 from which it is accessible.
- the control means further comprise, at two annular spaces 35 for respectively receiving two internal portions 36 of movable element 10, a sliding retaining module 44 cooperating with the free longitudinal edge 26 of each of the movable elements 10.
- the two elements concerned correspond to the second and the fifth elements 36 in the direction of the axis 4, although it could of course be otherwise, depending on the needs and constraints encountered.
- each sliding retaining module 44 comprises two guide ramps 46 disposed on either side of the control rod 40, these ramps 46 cooperating respectively with two guided pins 48 respectively integral with two free edges 26 in look, and more precisely two internal portions 36 facing.
- each module 44 is mounted via a threaded connection on the control rod 40, which performs the function of worm. Therefore, in case of rotation of the rod 40 according to its own axis, through the control member 42, each of the holding modules 40 moves relatively relative to the main structure 5, in the direction of axis 4.
- the permanent contact between the guide ramp 46 and its associated pin 48 is obtained by the resilient biasing means, spring-type, preferably compression spring.
- spring-type preferably compression spring.
- This is shown as an illustrative example on the figure 7 , showing the presence of springs 50 between the movable elements and the main structure 5, and more precisely between the hollow cylinder portion 38 and one or more of the wafers 30.
- the number and arrangement of the springs 50 are determined by according to the needs and constraints encountered, their action tending to push the movable elements of thermal conduction 10 towards their deployed position.
- the upper movable element 10 is shown in its retracted position, while the lower movable element 10 is shown in its extended position in which it is spaced from the main structure 5, as shown by the free space 52 between the portion hollow cylinder 38 and the periphery of the slabs 30.
- each guided pin 48 moves along its associated inclined ramp 46 with which it maintains the contact, thanks to the action exerted by Permanently by the springs 50.
- This is observed both when it is desired to move the elements 10 to their retracted position, that is to say when the rotation of the rod 40 exerted leads to bring the pins 48 of the rod 40 , when it is desired to move the elements 10 towards their deployed position, that is to say when the rotation of the rod 40 exerted leads to the removal of the pins 48 of this rod 40.
- This last phase in particular reflects the fact that the free edges 26 deviate from the main structure 5, following a pivoting of the elements 10 according to their respective axes of articulation 20.
- each mobile element 10 is equipped with two guided pins 48 spaced longitudinally, each of them cooperating with a separate retaining module 44.
- a container 100 also object of the present invention, comprising generally a package 102 inside which there is a storage device 2 as described above.
- the device 2 is intended to be placed in a cavity 112 of the package 102, as schematically shown in FIG. figure 8 on which it is also possible to see the longitudinal axis 104 of the package 102 coincides with the longitudinal axis 4 of the storage device, this package 102 having essentially a bottom 106 on which the device 2 is intended to rest in a vertical position, a cover 108, and a lateral body 110 extending around the longitudinal axis 104.
- this lateral body 110 which defines the housing cavity 112, with the aid of a lateral internal surface 114 of substantially cylindrical shape and of circular section, and of axis coinciding with the axes 104 and 4 above.
- the movable elements 10 are moved in their retracted position using the control means described above, in order to facilitate this operation of introduction of the basket, usually done vertically.
- the basket 2 is found in the configuration shown schematically on the figure 9a , wherein its lateral outer surface, namely the surfaces 12 of the movable elements 10, are spaced from the lateral inner surface 114 delimiting the housing cavity 112.
- the reference J placed between the surfaces 12 and 114 thus symbolizes the presence of a important initial clearance between the basket and the cavity of the package, before deployment of the mobile thermal conduction structure.
- each movable element 10 and the cavity 112 takes the form of a linear contact along a generatrix common to the surfaces 12 and 114, as shown schematically by the references 116 on the figure 9b .
- the deployment of the movable elements 10 reveals the free space 52, which is situated between the lateral inner surface 122 of the hollow cylinder portion of the movable element concerned 10, and the circumferential bearing surface 124 defined by the periphery of the patties 30, as visible on the figure 11 .
- the semi-annular internal portions 36 continue to be partially in contact with the two wafers 30 located on either side of each portion 36.
- each inner portion 36 of the movable elements 10 are respectively located in two separate transversal plans, and referenced 126 on the figure 11 also showing the new relative position of the guided pawns 48, by relative to their respective ramps 46 with which they are in contact.
- the cavity 112 is then closed by the lid 108 of the container.
- the container 100 is in the form of another preferred embodiment, in that it is the package 102 which carries the movable thermal conduction structure 8, and not the storage device 2 as it was the case in the previous mode.
- the inner lateral surface 114 delimiting the housing cavity 112 is at least partially defined by the lateral inner surfaces of the movable thermal conduction elements 10, which are now mounted articulated on the main structure 130 of the package, and more specifically on an inner peripheral portion thereof.
- Each movable member 10 is then mounted on the main structure 130 so as to be movable from a retracted position shown on the figure 12a , to an extended position shown on the figure 12b , approaching the longitudinal axis 104 of the housing cavity 112, thus moving away from the main structure 130 radially inwardly.
Description
La présente invention se rapporte de façon générale au domaine du transport et/ou stockage de matières nucléaires, tels que des assemblages de combustible nucléaire, et en particulier de combustible frais, par exemple du type Mox.The present invention relates generally to the field of transport and / or storage of nuclear materials, such as assemblies of nuclear fuel, and in particular fresh fuel, for example of the Mox type.
Néanmoins, l'invention pourrait également s'appliquer au domaine du transport et/ou stockage d'assemblages de combustible irradiés, sans sortir du cadre de l'invention.Nevertheless, the invention could also apply to the field of transport and / or storage of irradiated fuel assemblies, without departing from the scope of the invention.
Elle pourrait en outre trouver une application dans le domaine du transport et/ou stockage d'autres types de matières nucléaires, à savoir plus particulièrement les matières nucléaires dégageant une puissance thermique importante, tels que les déchets vitrifiés également dénommés « verres » et correspondant à des produits de fission.It could also find an application in the field of transport and / or storage of other types of nuclear material, namely more particularly nuclear material generating a significant thermal power, such as vitrified waste also called "glasses" and corresponding to fission products.
Classiquement, pour assurer le transport et/ou stockage d'assemblages de combustible nucléaire, il est utilisé des dispositifs de rangement, également appelés « panier » ou « râtelier » de rangement. Ces dispositifs de rangement, habituellement de forme cylindrique et de section sensiblement circulaire, disposent d'une pluralité de logements adjacents chacun apte à recevoir un assemblage de combustible nucléaire. De plus, le dispositif de rangement est destiné à être logé dans la cavité d'un emballage afin de former conjointement avec celui-ci un conteneur pour le transport et/ou stockage d'assemblage de combustible nucléaire, dans lequel la matière nucléaire est parfaitement confinée.Conventionally, for the transport and / or storage of nuclear fuel assemblies, storage devices are used, also called "basket" or "rack" storage. These storage devices, usually of cylindrical shape and of substantially circular section, have a plurality of adjacent housings each adapted to receive a nuclear fuel assembly. In addition, 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 nuclear fuel assembly, wherein the nuclear material is perfectly confined.
Il est à noter que le dispositif de rangement est généralement amovible. En d'autres termes, il est conçu pour rendre possible et aisé son chargement dans la cavité de l'emballage. Un jeu de fonctionnement est ainsi prévu entre la cavité de l'emballage et le dispositif de rangement pour permettre ces opérations de chargement/déchargement du panier.It should be noted that the storage device is generally removable. In other words, it is designed to make it easy and easy to load into the cavity of the package. An operating clearance is thus provided between the cavity of the package and the storage device to allow these loading / unloading operations of the basket.
Il est habituellement recherché à obtenir une conduction thermique satisfaisante entre le panier et l'emballage, dans le but d'évacuer, vers l'extérieur du conteneur, la chaleur importante dégagée par les assemblages de combustible.It is usually desired to obtain a satisfactory thermal conduction between the basket and the packaging, in order to evacuate to the outside of the container, the significant heat generated by the fuel assemblies.
Cette évacuation de chaleur est en partie recherchée afin de respecter le critère de température maximale autorisée pour les assemblages de combustible. En effet, en cas de dépassement de cette température, l'intégrité des crayons de combustibles qui constituent les assemblages pourrait être fragilisée en raison de la potentielle dégradation des caractéristiques mécaniques des gaines de ces crayons.This heat evacuation is partly sought in order to meet the maximum temperature criterion for fuel assemblies. Indeed, in case of exceeding this temperature, the integrity of the fuel rods that constitute the assemblies could be weakened because of the potential degradation of the mechanical characteristics of the sheaths of these rods.
Par ailleurs, il est à noter que la résistance mécanique du panier doit être compatible avec les exigences réglementaires de sûreté pour le transport/stockage de matières nucléaires, notamment en ce qui concerne les épreuves dites de chute libre. Or les caractéristiques mécaniques des matériaux utilisés pour la fabrication du panier peuvent se dégrader sensiblement en fonction de la température, en particulier lorsque ces matériaux sont l'aluminium ou l'un de ses alliages. L'évacuation de chaleur entre le panier et l'emballage est donc également recherchée de façon à garantir une résistance mécanique satisfaisante du panier.In addition, it should be noted that the mechanical strength of the basket must be compatible with the regulatory safety requirements for the transport / storage of nuclear material, in particular with regard to so-called free fall tests. However, the mechanical characteristics of the materials used for the manufacture of the basket can degrade significantly depending on the temperature, particularly when these materials are aluminum or one of its alloys. Heat evacuation between the basket and the packaging is therefore also sought so as to ensure satisfactory mechanical strength of the basket.
Pour des raisons économiques, la surface intérieure latérale délimitant la cavité de l'emballage est réalisée avec des tolérances de fabrication larges. L'un des inconvénients résultant de l'utilisation de tolérances de fabrication larges réside dans la nécessité d'augmenter sensiblement le jeu habituellement prévu pour rendre possible et aisé le chargement d'un panier amovible dans la cavité de l'emballage, comme évoqué précédemment. Le jeu observé remplit alors un rôle d'isolant thermique allant à l'encontre du but global recherché de conduction thermique entre le panier et l'emballage, et rend donc difficile l'évacuation de la chaleur dégagée par les assemblages de combustible nucléaire.For economic reasons, the inner side surface defining the cavity of the package is made with wide manufacturing tolerances. One of the disadvantages resulting from the use of wide manufacturing tolerances lies in the need to substantially increase the clearance usually provided to make it possible and easy to load a removable basket into the cavity of the package, as mentioned previously. . The observed play then performs a thermal insulating role going against the desired overall goal of thermal conduction between the basket and the package, and thus makes it difficult to evacuate the heat generated by the nuclear fuel assemblies.
L'invention a donc pour but de remédier aux inconvénients mentionnés ci-dessus, relatifs aux réalisations de l'art antérieur.The invention therefore aims to overcome the disadvantages mentioned above, relating to the achievements of the prior art.
Pour ce faire, l'invention a tout d'abord pour objet un dispositif de rangement pour le transport et/ou stockage de matières nucléaires, tels que des assemblages de combustible nucléaire, de préférence frais, comprenant une structure principale définissant au moins un logement destiné à contenir lesdites matières nucléaires, le dispositif comportant également une structure mobile de conduction thermique formant au moins une partie d'une surface extérieure latérale dudit dispositif de rangement, ladite structure mobile de conduction thermique comprenant au moins un élément mobile de conduction thermique monté sur ladite structure principale de manière à pouvoir être déplacé, de manière réversible, d'une position escamotée vers une position déployée en s'écartant de ladite structure principale.To do this, the invention firstly relates to a storage device for transport and / or storing nuclear material, such as nuclear fuel assemblies, preferably fresh, comprising a main structure defining at least one housing for containing said nuclear material, the device also comprising a movable thermal conduction structure forming at least one part of a lateral outer surface of said storage device, said mobile thermal conduction structure comprising at least one movable thermal conduction member mounted on said main structure so as to be reversibly movable from a retracted position to a deployed position away from said main structure.
Le dispositif de rangement ou panier de rangement selon l'invention présente donc d'une manière originale un caractère déployable lui permettant d'augmenter sensiblement les surfaces de contact avec la surface intérieure latérale de l'emballage, délimitant la cavité dans laquelle se trouve le panier. Le transfert thermique entre le panier et l'emballage est de ce fait assuré de manière satisfaisante, sans pour autant nécessiter l'utilisation de tolérances de fabrication étroites et coûteuses pour la réalisation de la surface intérieure latérale délimitant la cavité. En effet, même si l'utilisation de tolérances de fabrication larges conduit à considérer un jeu plus important entre l'emballage et le panier que celui habituellement prévu pour permettre le chargement de ce dernier, une fois celui-ci logé à l'intérieur de la cavité, la structure de conduction thermique peut alors être déployée afin d'obtenir la surface de contact désirée entre le panier et la cavité de l'emballage, ce qui limite voire éradique entièrement les effets néfastes discutés antérieurement relatifs à la présence du jeu important initial formant isolant thermique.The storage device or storage basket according to the invention therefore presents in an original manner a deployable character allowing it to substantially increase the contact surfaces with the inner lateral surface of the package, delimiting the cavity in which is located the basket. The heat transfer between the basket and the packaging is thus satisfactorily provided, without requiring the use of narrow and expensive manufacturing tolerances for the realization of the inner lateral surface delimiting the cavity. Indeed, even if the use of wide manufacturing tolerances leads to consider greater play between the package and the basket that usually provided to allow the loading of the latter, once it housed inside of the cavity, the thermal conduction structure can then to be deployed in order to obtain the desired contact surface between the basket and the cavity of the package, which limits or even completely eliminates the previously discussed adverse effects relating to the presence of the initial high clearance forming thermal insulation.
La fonction d'évacuation de chaleur procurée par la structure de conduction thermique en position déployée permet de respecter le critère de température maximale autorisée pour les assemblages de combustible, ou pour tous les autres types de matières nucléaires destinées à être stockées/transportées. Par conséquent, avec la configuration selon l'invention, les risques de dégradation des gaines protectrices des assemblages et leur risque d'affaiblissement mécanique sont avantageusement réduits à néant.The heat removal function provided by the thermal conduction structure in the deployed position makes it possible to meet the maximum temperature criterion allowed for the fuel assemblies, or for all the other types of nuclear material intended to be stored / transported. Consequently, with the configuration according to the invention, the risks of degradation of the protective sheaths of the assemblies and their risk of mechanical weakening are advantageously reduced to nothing.
Enfin, il est indiqué que la réduction de la température globale au sein du panier de rangement, permise par la structure de conduction thermique, engendre avantageusement un accroissement de la durée de vie de ce panier, en particulier lorsque celui-ci est fabriqué en aluminium ou dans l'un de ses alliages.Finally, it is stated that the reduction of the overall temperature within the storage basket, permitted by the thermal conduction structure, advantageously generates an increase in the service life of this basket, particularly when it is made of aluminum or in one of its alloys.
Dans ce dernier cas, la réduction de température contribue également à justifier plus facilement le comportement mécanique du panier, notamment lors des épreuves de chute libre.In the latter case, the temperature reduction also contributes to justify more easily the mechanical behavior of the basket, especially during the free fall tests.
Si, comme cela ressort de ce qui précède, la structure de conduction thermique est de préférence déployée jusqu'à établir le contact avec la cavité de l'emballage, il est également possible d'envisager un déploiement moins important, ne conduisant pas au contact précité, sans sortir du cadre de l'invention. En effet, un simple déploiement de la structure de conduction thermique a pour conséquence avantageuse de réduire le jeu initialement prévu entre le panier et l'emballage, de sorte que le transfert thermique entre ces deux éléments se trouve sensiblement amélioré.If, as is apparent from the foregoing, the heat conduction structure is preferably deployed until contact is made with the cavity of the package, it is also possible to envisage a smaller deployment, not leading to contact. above, without departing from the scope of the invention. Indeed, a simple deployment of the thermal conduction structure has the advantageous consequence of reducing the clearance initially provided between the basket and the packaging, so that the heat transfer between these two elements is substantially improved.
Grâce au caractère réversible du déplacement de l'élément mobile, ce dernier peut être ultérieurement replacé dans sa position escamotée, afin en particulier de faciliter l'extraction du panier hors de l'emballage.Thanks to the reversible nature of the displacement of the movable member, the latter can be later returned to its retracted position, in particular to facilitate the extraction of the basket out of the package.
De préférence, dans au moins une demi-section longitudinale du dispositif de rangement passant par un axe longitudinal de celui-ci et traversant la structure mobile de conduction thermique, la somme des longueurs de chaque élément mobile de la structure mobile traversée, selon l'axe longitudinal du dispositif de rangement, représente au moins 20 % d'une longueur totale dudit dispositif de rangement selon son axe longitudinal. Naturellement, il est indiqué que plus la valeur du pourcentage indiquée ci-dessus est importante, plus le transfert thermique assuré par les éléments mobiles de conduction thermique est satisfaisant.Preferably, in at least one longitudinal half-section of the storage device passing through a longitudinal axis thereof and passing through the mobile thermal conduction structure, the sum of the lengths of each movable element of the mobile structure traversed, according to the longitudinal axis of the storage device, represents at least 20% of a total length of said storage device along its longitudinal axis. Naturally, it is stated that the higher the value of the percentage indicated above, the more the heat transfer provided by the moving elements of thermal conduction is satisfactory.
De préférence, au moins un élément mobile est monté articulé sur ladite structure principale, selon un axe d'articulation parallèle à un axe longitudinal dudit dispositif de rangement. Cette conception est parfaitement adaptée à l'obtention d'un contact linéaire longitudinal entre l'élément mobile et la cavité d'emballage. A cet égard, il est de préférence fait en sorte que chacun des éléments mobiles de la structure soit monté articulé sur ladite structure principale, selon un axe d'articulation parallèle à l'axe longitudinal du dispositif de rangement.Preferably, at least one movable element is articulated on said main structure, along an axis of articulation parallel to a longitudinal axis of said storage device. This design is perfectly suited to obtaining a longitudinal linear contact between the movable element and the packaging cavity. In this respect, it is preferable to ensure that each of the elements movable structure is mounted articulated on said main structure, along an axis of articulation parallel to the longitudinal axis of the storage device.
Préférentiellement, l'axe d'articulation traverse une portion périphérique de ladite structure principale.Preferably, the hinge axis passes through a peripheral portion of said main structure.
De plus, la surface extérieure latérale d'au moins un élément mobile, et de préférence de chacun de ces éléments, prend la forme d'une portion angulaire d'une surface cylindrique d'axe longitudinal parallèle à un axe longitudinal dudit dispositif de rangement, ladite portion angulaire étant inférieure ou égale à 180°. Ainsi, lorsqu'ils occupent leur position escamotée, les éléments mobiles permettent de participer à la formation d'une surface extérieure latérale du dispositif de rangement de forme sensiblement cylindrique, et de préférence de section circulaire.In addition, the lateral outer surface of at least one movable element, and preferably of each of these elements, takes the form of an angular portion of a cylindrical surface of longitudinal axis parallel to a longitudinal axis of said storage device said angular portion being less than or equal to 180 °. Thus, when they occupy their retracted position, the movable elements can participate in the formation of a lateral outer surface of the storage device of substantially cylindrical shape, and preferably of circular section.
De préférence, au moins un élément mobile, et de préférence chacun de ces éléments, est articulé sur ladite structure principale au niveau d'un chant longitudinal de cet élément.Preferably, at least one movable element, and preferably each of these elements, is articulated on said main structure at a longitudinal edge of this element.
Toujours de manière préférentielle, autour d'une partie longitudinale donnée de ladite structure principale, ladite structure mobile présente une pluralité d'éléments mobiles de conduction thermique, répartis périphériquement. Dans un tel cas, on peut prévoir qu'en position escamotée de chacun de ladite pluralité d'éléments mobiles de conduction thermique, ceux-ci forment une enveloppe périphérique autour de ladite partie longitudinale donnée. L'enveloppe précitée pourrait alternativement ne pas être entièrement formée par la pluralité d'éléments mobiles, mais également à l'aide d'éléments fixes par rapport à la structure principale, par exemple chacun placé entre deux éléments mobiles consécutifs dans la direction périphérique.Still preferentially, around a given longitudinal portion of said main structure, said mobile structure has a plurality of movable thermal conduction elements, distributed peripherally. In such a case, it can be provided that in the retracted position of each of said plurality of mobile thermal conduction elements, these form a peripheral envelope around said given longitudinal portion. The aforementioned envelope may alternatively not be entirely formed by the plurality of movable elements, but also with the aid of fixed elements relative to the main structure, for example each placed between two consecutive movable elements in the peripheral direction.
De préférence, ladite enveloppe périphérique de la partie longitudinale donnée est constituée par deux, trois ou quatre éléments mobiles de conduction thermique, même si le nombre de ces éléments pourrait être supérieur, sans sortir du cadre de l'invention.Preferably, said peripheral envelope of the given longitudinal part is constituted by two, three or four mobile thermal conduction elements, even if the number of these elements could be greater, without departing from the scope of the invention.
Toujours de manière préférentielle, ladite structure mobile de conduction thermique comprend une pluralité d'éléments mobiles de conduction thermique répartis le long d'une direction longitudinale du dispositif de rangement. Cette caractéristique préférée fait ressortir la nature « tronçonnée » de la structure mobile selon la direction longitudinale du dispositif de rangement. Néanmoins, il serait alternativement possible de prévoir que chaque élément mobile s'étende sur sensiblement toute la longueur de la structure de conduction thermique dans la direction de l'axe longitudinal du dispositif de rangement, sans sortir du cadre de l'invention.Still preferentially, said mobile thermal conduction structure comprises a plurality of movable thermal conduction elements distributed along a longitudinal direction of the storage device. This preferred feature highlights the "cut" nature of the movable structure in the longitudinal direction of the storage device. Nevertheless, it would alternatively be possible to provide that each movable element extends over substantially the entire length of the thermal conduction structure in the direction of the longitudinal axis of the storage device, without departing from the scope of the invention.
Comme évoqué précédemment, on peut faire en sorte qu'en position escamotée de chaque élément de ladite structure mobile de conduction thermique, celle-ci forme sensiblement l'intégralité de la surface extérieure latérale dudit dispositif de rangement. Cela traduit le fait que l'intégralité de la structure principale est « recouverte » latéralement par la structure mobile, bien qu'il pourrait en être autrement, sans sortir du cadre de l'invention. A cet égard, on peut prévoir que seules les extrémités supérieure et inférieure du panier ne sont pas recouvertes par la structure déployable de conduction thermique.As mentioned above, it can be ensured that in the retracted position of each element of said mobile thermal conduction structure, it forms substantially the entirety of the lateral outer surface of said storage device. it reflects the fact that the entirety of the main structure is "covered" laterally by the mobile structure, although it could be otherwise, without departing from the scope of the invention. In this regard, it can be provided that only the upper and lower ends of the basket are not covered by the deployable structure of thermal conduction.
Préférentiellement, au moins un élément mobile de conduction thermique, et de préférence chacun de ces éléments, est rappelé vers sa position escamotée ou vers sa position déployée par des moyens élastiques de rappel, par exemple du type ressort.Preferably, at least one movable thermal conduction member, and preferably each of these elements, is biased towards its retracted position or towards its deployed position by elastic return means, for example of the spring type.
De préférence, le dispositif de rangement comporte des moyens de commande permettant d'engendrer le déplacement de chaque élément mobile de conduction thermique de sa position escamotée vers sa position déployée, et inversement, lesdits moyens de commande étant actionnables depuis l'extérieur du dispositif rangement, et plus préférentiellement actionnables extérieurement depuis une extrémité supérieure du dispositif de rangement. A ce titre, on prévoit de préférence que lesdits moyens de commande comprennent une tige de commande traversant ladite structure principale parallèlement à un axe longitudinal dudit dispositif de rangement. De plus, on peut faire en sorte que lesdits moyens de commande comprennent un organe de commande pouvant être actionné depuis une plaque de tête du dispositif de rangement.Preferably, the storage device comprises control means for generating the displacement of each movable thermal conduction element from its retracted position to its deployed position, and vice versa, said control means being operable from outside the storage device and more preferably operable externally from an upper end of the storage device. As such, it is preferably provided that said control means comprise a control rod passing through said main structure parallel to a longitudinal axis of said storage device. In addition, it can be arranged that said control means comprise a control member operable from a head plate of the storage device.
Enfin, il est rappelé que le dispositif de rangement s'applique préférentiellement au transport et/ou stockage d'assemblages de combustible nucléaire frais, par exemple du type Mox.Finally, it is recalled that the storage device applies preferentially to transport and / or storage of fresh nuclear fuel assemblies, for example of the Mox type.
Un autre objet de la présente invention concerne un emballage comprenant une cavité de logement d'un dispositif de rangement pour le transport et/ou stockage de matières nucléaires, ledit emballage comprenant une structure principale et ladite cavité de logement étant délimitée par une surface intérieure latérale dudit emballage. Selon l'invention, l'emballage comporte également une structure mobile de conduction thermique formant au moins une partie de ladite surface intérieure latérale de l'emballage, ladite structure mobile de conduction thermique comprenant au moins un élément mobile de conduction thermique monté sur ladite structure principale de manière à pouvoir être déplacé, de manière réversible, d'une position escamotée vers une position déployée en s'approchant d'un axe longitudinal de ladite cavité de logement.Another object of the present invention relates to a package comprising a housing cavity of a storage device for transporting and / or storing nuclear material, said package comprising a main structure and said housing cavity being delimited by a lateral inner surface. said package. According to the invention, the packaging also comprises a mobile thermal conduction structure forming at least a part of said inner lateral surface of the package, said mobile thermal conduction structure comprising at least one mobile thermal conduction element mounted on said structure primary so as to be releasably movable from a retracted position to an extended position approaching a longitudinal axis of said housing cavity.
Ainsi, les avantages décrits ci-dessus relatifs au dispositif de rangement selon la présente invention, caractérisent de manière analogue l'emballage selon l'invention, étant donné que le concept commun entre ces deux entités réside dans la fourniture d'une structure de conduction thermique déployable permettant d'améliorer le transfert thermique entre le panier et l'emballage, en établissant un contact entre ces deux entités, ou, comme évoqué ci-dessus, par simple réduction du jeu initialement prévu entre ces deux éléments.Thus, the advantages described above relating to the storage device according to the present invention, characterize analogously the packaging according to the invention, since the common concept between these two entities lies in the provision of a conduction structure deployable thermal system to improve the heat transfer between the basket and the packaging, establishing a contact between these two entities, or, as mentioned above, by simply reducing the clearance initially provided between these two elements.
En particulier, même si l'utilisation de tolérances de fabrication larges conduit à considérer un jeu important entre l'emballage et le panier pour permettre le chargement de ce dernier, une fois celui-ci logé à l'intérieur de la cavité, la structure de conduction thermique peut alors être déployée afin d'accroître les surfaces de contact avec le panier de rangement, ce qui limite voire éradique entièrement les effets néfastes discutés antérieurement relatifs à la présence du jeu important initial formant isolant thermique.In particular, even if the use of wide manufacturing tolerances leads to consider a large clearance between the packaging and the basket to allow the loading of the latter, once it is housed inside the cavity, the structure thermal conduction can then be deployed to increase the contact surfaces with the storage basket, which limits or even eliminates the adverse effects previously discussed relating to the presence of the initial large game forming thermal insulation.
Par ailleurs, l'ensemble des caractéristiques préférentielles exposées ci-dessus et associées au dispositif de rangement peuvent s'appliquer d'une manière analogue à l'emballage selon l'invention. Néanmoins, seules quelques unes d'entre elles sont rappelées ci-après.Moreover, all of the preferential features described above and associated with the storage device can be applied in a similar manner to the packaging according to the invention. Nevertheless, only a few of them are recalled below.
De préférence, dans au moins une demi-section longitudinale de l'emballage passant par l'axe longitudinal de ladite cavité de logement et traversant la structure mobile de conduction thermique, la somme des longueurs de chaque élément mobile de la structure mobile traversée, selon l'axe longitudinal de ladite cavité de logement, représente au moins 20 % d'une longueur totale de ladite cavité de logement selon son axe longitudinal.Preferably, in at least one longitudinal half-section of the package passing through the longitudinal axis of said housing cavity and passing through the mobile thermal conduction structure, the sum of the lengths of each movable element of the mobile structure traversed, according to the longitudinal axis of said housing cavity, represents at least 20% of a total length of said housing cavity along its longitudinal axis.
De préférence, au moins un élément mobile est monté articulé sur ladite structure principale de l'emballage, selon un axe d'articulation parallèle à l'axe longitudinal de ladite cavité de logement.Preferably, at least one movable element is articulated on said main structure of the package, along an axis of articulation parallel to the longitudinal axis of said housing cavity.
De préférence, ledit axe d'articulation traverse une portion périphérique intérieure de ladite structure principale de l'emballage.Preferably, said hinge axis passes through an inner peripheral portion of said main structure of the package.
De préférence, la surface intérieure latérale d'au moins un élément mobile prend la forme d'une portion angulaire d'une surface cylindrique d'axe longitudinal parallèle à l'axe longitudinal de ladite cavité de logement, ladite portion angulaire étant inférieure ou égale à 180°.Preferably, the lateral inner surface of at least one movable element takes the form of an angular portion of a cylindrical surface having a longitudinal axis parallel to the longitudinal axis of said housing cavity, said angular portion being less than or equal to at 180 °.
De préférence, au moins un élément mobile est articulé sur ladite structure principale de l'emballage au niveau d'un chant longitudinal de cet élément.Preferably, at least one movable element is articulated on said main structure of the package at a longitudinal edge of this element.
Toujours préférentiellement, au niveau d'une partie longitudinale donnée de ladite structure principale de l'emballage, ladite structure mobile présente une pluralité d'éléments mobiles de conduction thermique, répartis périphériquement, et servant donc à délimiter la cavité de logement. De préférence, en position escamotée de chacun de ladite pluralité d'éléments mobiles de conduction thermique, ceux-ci forment une portion d'une couronne périphérique disposée intérieurement par rapport à ladite partie longitudinale donnée.Still preferentially, at a given longitudinal portion of said main structure of the package, said movable structure has a plurality of movable thermal conduction elements, distributed peripherally, and thus serving to delimit the housing cavity. Preferably, in the retracted position of each of said plurality of movable thermal conduction elements, these form a portion of a peripheral ring disposed internally with respect to said given longitudinal portion.
De préférence, ladite portion de couronne périphérique est constituée par deux, trois ou quatre éléments mobiles de conduction thermique.Preferably, said peripheral ring portion is constituted by two, three or four mobile thermal conduction elements.
De préférence, ladite structure mobile de conduction thermique comprend une pluralité d'éléments mobiles de conduction thermique répartis le long d'une direction longitudinale de la cavité de logement.Preferably, said mobile thermal conduction structure comprises a plurality of movable thermal conduction elements distributed along a longitudinal direction of the housing cavity.
De préférence, au moins un élément mobile de conduction thermique est maintenu dans sa position escamotée ou dans sa position déployée à l'aide de moyens élastiques de rappel.Preferably, at least one movable thermal conduction element is held in its retracted position or in its deployed position by elastic return means.
De préférence, il comporte en outre des moyens de commande permettant d'engendrer le déplacement de chaque élément mobile de conduction thermique de sa position escamotée vers sa position déployée, et inversement, lesdits moyens de commande étant actionnables depuis l'extérieur de l'emballage, et plus préférentiellement actionnables extérieurement depuis une extrémité supérieure de l'emballage.Preferably, it further comprises control means for generating the displacement of each movable thermal conduction member from its retracted position to its deployed position, and vice versa, said control means being operable from outside the package and more preferably operable externally from an upper end of the package.
De préférence, les moyens de commande comprennent une tige de commande traversant ladite structure principale de l'emballage, parallèlement à l'axe longitudinal de ladite cavité de logement.Preferably, the control means comprise a control rod passing through said main structure of the package, parallel to the longitudinal axis of said housing cavity.
Un autre objet de la présente invention se rapporte à un conteneur pour le transport et/ou stockage de matières nucléaires, ce conteneur comprenant un emballage ainsi qu'un dispositif de rangement placé de manière amovible dans ledit emballage, ledit emballage étant un emballage tel que décrit ci-dessus, et/ou ledit dispositif de rangement étant un dispositif de rangement tel que décrit ci-dessus.Another object of the present invention relates to a container for the transport and / or storage of nuclear material, this container comprising a package and a storage device removably placed in said package, said package being a package such that described above, and / or said storage device being a storage device as described above.
En d'autres termes, l'invention se rapporte à un conteneur pour le transport et/ou stockage de matières nucléaires, ce conteneur comprenant un emballage ainsi qu'un dispositif de rangement placé de manière amovible dans ledit emballage, et une structure mobile de conduction thermique comportant au moins un élément mobile de conduction thermique agencé de manière à pouvoir être déplacé, de manière réversible, d'une position escamotée vers une position déployée de façon à réduire le jeu existant entre le dispositif de rangement et l'emballage, voire à mettre ces deux composants mutuellement en contact, la structure mobile de conduction thermique faisant indifféremment partie du dispositif de rangement et/ou de l'emballage.In other words, the invention relates to a container for the transport and / or storage of nuclear material, this container comprising a package and a storage device removably placed in said package, and a movable structure of thermal conduction comprising at least one movable thermal conduction member arranged to be releasably movable from a retracted position to an extended position to reduce the clearance between the storage device and the package, or to both of these components mutually in contact, the mobile thermal conduction structure indifferently part of the storage device and / or packaging.
Enfin, l'invention a également pour objet un procédé de chargement d'un dispositif de rangement tel que décrit ci-dessus dans un emballage de manière à former un conteneur pour le transport et/ou stockage de matières nucléaires, le procédé comprenant une étape d'introduction dudit dispositif de rangement à l'intérieur d'une cavité définie par l'emballage à l'aide d'une surface latérale intérieure de celui-ci, caractérisé en ce qu'il comprend également une étape ultérieure de déploiement de ladite structure mobile de conduction thermique. De préférence, ce déploiement est réalisé de sorte que chaque élément mobile de conduction thermique de ladite structure mobile vienne au contact de ladite surface latérale intérieure délimitant ladite cavité de l'emballage. Néanmoins, il est également possible d'envisager un déploiement moins important, ne conduisant pas au contact précité, dont le but est de réduire le jeu initialement prévu entre le panier et l'emballage, de manière à améliorer le transfert thermique entre ces deux éléments.Finally, the invention also relates to a method of loading a storage device as described above in a package so as to form a container for the transport and / or storage of nuclear materials, the method comprising a step introducing said storage device into a cavity defined by the package by means of an inner side surface thereof, characterized in that it also comprises a subsequent step of deploying said mobile structure of thermal conduction. Preferably, this deployment is carried out so that each mobile thermal conduction member of said mobile structure comes into contact with said inner lateral surface delimiting said cavity of the package. Nevertheless, it is also possible to envisage a smaller deployment, not leading to the aforementioned contact, the purpose of which is to reduce the initially planned clearance between the basket and the package, so as to improve the heat transfer between these two elements. .
D'autres avantages et caractéristiques de l'invention apparaîtront dans la description détaillée non limitative ci-dessous.Other advantages and features of the invention will become apparent in the detailed non-limiting description below.
Cette description sera faite au regard des dessins annexés parmi lesquels ;
- la
figure 1 représente une vue schématique en perspective d'un dispositif de rangement pour le transport et/ou stockage d'assemblages de combustible nucléaire, selon un mode de réalisation préféré de la présente invention ; - la
figure 2 représente une demi-section longitudinale schématique du dispositif de rangement, prise le long de la ligne II-II de lafigure 1 ; - la
figure 3 représente une vue en coupe transversale prise selon le plan P1 de lafigure 1 ; - la
figure 4 représente une vue partielle en perspective du dispositif de rangement montré sur les figures précédentes, sur laquelle les deux éléments mobiles de conduction thermique, entourant une partie longitudinale de la structure principale du dispositif, n'ont été que partiellement représentés ; - la
figure 5 représente une vue schématique en perspective de l'un des deux éléments mobiles de conduction thermique partiellement représentés sur le dispositif de rangement de lafigure 4 ; - la
figure 6 représente une vue en coupe longitudinale du dispositif de rangement, prise le long de la ligne VI-VI de lafigure 3 ; - la
figure 7 représente une vue en coupe transversale du dispositif de rangement, prise le long de la ligne VII-VII de lafigure 6 , l'un des deux éléments mobiles de conduction thermique étant représenté en position escamotée, et l'autre en position déployée ; - la
figure 8 montre une vue schématique en coupe longitudinale d'un conteneur pour le transport et/ou stockage d'assemblages de combustible nucléaire, comprenant le dispositif de rangement montré sur les figures précédentes ; - la
figure 9a représente une vue schématique en coupe transversale du dispositif de rangement, prise le long de la ligne IX-IX de lafigure 8 , les éléments mobiles de conduction thermique étant représentés en position escamotée ; - la
figure 9b représente une vue schématique en coupe transversale du dispositif de rangement, prise le long de la ligne IX-IX de lafigure 8 , les éléments mobiles de conduction thermique étant représentés en position déployée ; - la
figure 10 représente une vue détaillée en coupe transversale du dispositif de rangement montré dans la configuration de lafigure 9b ; - la
figure 11 représente une vue en coupe longitudinale du dispositif de rangement, prise le long de la ligne XI-XI de lafigure 10 ; et - les
figures 12a et12b montrent des vues schématiques similaires à celles montrées sur lesfigures 9a et9b , avec le conteneur se présentant sous la forme d'un autre mode de réalisation préféré de la présente invention.
- the
figure 1 is a schematic perspective view of a storage device for transporting and / or storing nuclear fuel assemblies, according to a preferred embodiment of the present invention; - the
figure 2 represents a schematic longitudinal half-section of the storage device, taken along the line II-II of thefigure 1 ; - the
figure 3 represents a cross-sectional view taken along the plane P1 of thefigure 1 ; - the
figure 4 is a partial perspective view of the storage device shown in the preceding figures, in which the two movable thermal conduction elements, surrounding a longitudinal portion of the main structure of the device, have only been partially represented; - the
figure 5 is a schematic perspective view of one of the two movable thermal conduction elements partially shown on the storage device of thefigure 4 ; - the
figure 6 represents a longitudinal sectional view of the storage device, taken along the line VI-VI of thefigure 3 ; - the
figure 7 represents a cross-sectional view of the storage device, taken along the line VII-VII of thefigure 6 , one of the two mobile thermal conduction elements being represented in the retracted position, and the other in the deployed position; - the
figure 8 shows a schematic view in longitudinal section of a container for the transport and / or storage of nuclear fuel assemblies, comprising the storage device shown in the preceding figures; - the
figure 9a is a schematic cross-sectional view of the storage device taken along line IX-IX of thefigure 8 , the movable thermal conduction elements being represented in the retracted position; - the
figure 9b is a schematic cross-sectional view of the storage device taken along line IX-IX of thefigure 8 the moving thermal conduction elements being shown in the deployed position; - the
figure 10 represents a detailed cross-sectional view of the storage device shown in the configuration of thefigure 9b ; - the
figure 11 represents a longitudinal sectional view of the storage device, taken along the line XI-XI of thefigure 10 ; and - the
figures 12a and12b show schematic views similar to those shown on theFigures 9a and9b with the container in the form of another preferred embodiment of the present invention.
Tout d'abord en référence à la
Le dispositif de rangement 2 est prévu pour être placé dans un emballage (non représenté sur cette figure) destiné au transport et/ou stockage d'assemblages de combustible nucléaire (non représentés), de préférence frais, par exemple du type Mox.The
Comme on peut le voir sur la
Dans la suite de la description, le terme « longitudinal » doit être compris comme parallèle à l'axe longitudinal 4 du panier, et le terme « transversal » doit être compris comme orthogonal à ce même axe longitudinal 4.In the following description, the term "longitudinal" should be understood as parallel to the
La conception de la structure principale 5 du dispositif de rangement 2 peut être de toute forme connue de l'homme du métier, comme par exemple du type basée sur l'empilement de galettes traversées par des chemises de délimitation de logement, ou encore du type visant à obtenir les logements L juxtaposés les uns aux autres par l'intermédiaire d'une pluralité d'ensembles structurels à encoches empilés et entrecroisés.The design of the
Il est noté que le dispositif de rangement 2 est montré dans une position verticale de chargement/déchargement des assemblages de combustible, différente de la position horizontale/couchée habituellement adoptée durant le transport des assemblages. En effet, comme cela est connu de l'homme du métier, ces assemblages sont destinés à être préalablement introduits dans les logements L avec le dispositif 2 agencé verticalement, à savoir reposant sur un fond 6 situé à une extrémité du dispositif opposée à celle portant une plaque de tête 11, à travers laquelle les assemblages passent avant de pénétrer dans leurs logements respectifs.It is noted that the
Le panier de rangement 2 comprend une surface extérieure latérale 7, dont une grande partie est constituée par la surface extérieure latérale 12 d'éléments mobiles 10 appartenant à une structure mobile de conduction thermique 8, qui sera détaillée ci-après. En effet, dans le mode de réalisation préféré décrit, cela se traduit par le fait que la quasi-intégralité de la structure principale 5 est recouverte latéralement par la structure mobile 8, puisque seules les extrémités supérieure 14 et inférieure 16 du panier 2 ne sont pas recouvertes par les éléments mobiles de conduction thermique 10.The
Toujours en référence à la
Au niveau de chacun de ces tronçons 18a-18c, la structure 8 comporte deux éléments mobiles 10 répartis angulairement/périphériquement, et s'étendant chacun sur un secteur angulaire d'environ 180° afin de constituer conjointement une enveloppe périphérique autour de la partie longitudinale concernée 18a-18c, et ce lorsque les éléments mobiles 10 occupent une position escamotée telle qu'elle sera décrite ultérieurement.At each of these
Les trois enveloppes périphériques ainsi formées sont adjacentes dans la direction longitudinale du panier 2, et peuvent donc être assimilées à une même et unique enveloppe sensiblement continue, s'étendant tout autour de la structure principale 5, et sensiblement sur la quasi-totalité de la longueur du panier 2.The three peripheral envelopes thus formed are adjacent in the longitudinal direction of the
A cet égard, en référence à la
En d'autres termes, dans le mode de réalisation préféré décrit dans lequel la longueur totale 12 correspond à la somme des trois longueurs 11 à laquelle il faut ajouter les longueurs des deux extrémités 14, 16, la relation suivante est vérifiée :
A ce titre, il est indiqué que le rapport 3.11 / 12 est de préférence identique quelque soit la demi-section longitudinale considérée, ce qui traduit le fait que la structure déployable 8 présente une longueur constante tout autour de la structure principale 5.As such, it is indicated that the ratio 3.11 / 12 is preferably identical regardless of the longitudinal half-section considered, which reflects the fact that the
En référence à présent à la
Ainsi, pour chacun des deux éléments mobiles 10, on place de préférence cet axe d'articulation 20 de manière à ce qu'il se situe au niveau d'un chant longitudinal articulé 22 de l'élément, et de façon à ce qu'il traverse une portion périphérique 24 de la structure principale 5, comme cela est clairement visible sur la
En outre, toujours sur cette même figure, on peut voir que la surface extérieure latérale 12 de chacun des deux éléments mobiles 10 prend la forme d'une portion angulaire d'une surface cylindrique, de section circulaire et d'axe longitudinal parallèle à l'axe longitudinal 4, et de préférence confondu avec ce dernier lorsque l'élément mobile 10 occupe sa position escamotée représentée.Furthermore, still in this same figure, it can be seen that the lateral
Comme mentionné précédemment, la portion angulaire est de l'ordre de 180°, ce qui permet aux deux éléments 10 de former conjointement une enveloppe fermée autour du tronçon longitudinal considéré, dont la surface extérieure latérale 12, constituant une partie de la surface extérieure latérale 7 du panier 2, prend la forme d'une portion cylindrique de section circulaire.As mentioned above, the angular portion is of the order of 180 °, which allows the two
Dans le mode de réalisation préféré décrit, les deux chants longitudinaux articulés 22 sont sensiblement placés en regard l'un de l'autre, et sont donc disposés de manière diamétralement opposée aux deux chants longitudinaux libres 26 des deux éléments mobiles. Bien évidemment, en position escamotée de ces derniers telle que montrée sur la
L'une des particularités de la présente invention réside dans le fait que chacun des deux éléments mobiles de conduction thermique 10 est monté sur la structure principale 5 de manière à pouvoir être déplacé de la position escamotée vers une position déployée qui sera décrite ci-après, en s'écartant de la structure principale 5, à savoir en s'éloignant de l'axe 4 par pivotement selon son axe d'articulation 20.One of the peculiarities of the present invention lies in the fact that each of the two movable
A présent en référence à la
Ainsi, on peut apercevoir que la structure principale 5 comporte des galettes transversales 30 espacées longitudinalement les unes des autres, leur périphérie formant conjointement une unique surface d'appui circonférentielle de forme cylindre et de section circulaire, destinée à être épousée par une surface intérieure latérale de l'élément mobile associé 10, en position escamotée. Les espaces annulaires 35 situés entre deux galettes transversales 30 directement consécutives sont comblés par des éléments semi-annulaires 36, prenant donc chacun de préférence la forme d'un demi-anneau de section sensiblement carrée ou rectangulaire, ces éléments 36 faisant partie intégrante des éléments mobiles 10, comme cela va être exposé ci-dessous.Thus, it can be seen that the
Ainsi, dans chaque tronçon 18a-18c, ce sont six espaces annulaires 35 qui sont laissés libres pour pouvoir être pénétrés respectivement par les six éléments semi-annulaires 36 des éléments mobiles 10. Il est noté que ces éléments 36 participent fortement au transfert thermique entre l'élément mobile 10 et la structure principale 5, au niveau de ses galettes 30, ce transfert thermique permettant d'améliorer le transfert thermique entre le panier et la cavité. Pour cela, le jeu de fonctionnement requis entre les galettes 30 et les éléments semi-annulaires 36 est fixé pour être le plus faible possible.Thus, in each
Comme cela est visible sur la
Par ailleurs, dans chaque tronçon 18a-18c, deux des six espaces annulaires 35, laissés libres pour pouvoir être pénétrés par les portions internes 36, logent une partie des moyens de commande de la mise en mouvement de ces éléments, comme cela va à présent être détaillé en référence aux
Les moyens de commande comprennent tout d'abord une tige de commande 40 traversant la structure principale 5 parallèlement à l'axe longitudinal 4, cette tige de commande 40 étant globalement située entre les chants longitudinaux libres 26 des éléments mobiles 10, comme cela est le mieux visible sur la
Les moyens de commande comportent en outre, au niveau de deux espaces annulaires 35 pour recevoir respectivement deux portions internes 36 d'élément mobile 10, un module de retenue coulissant 44 coopérant avec le chant longitudinal libre 26 de chacun des éléments mobiles 10. A titre indicatif, les deux éléments concernés correspondent au second et au cinquième éléments 36 selon la direction de l'axe 4, bien qu'il pourrait naturellement en être autrement, en fonction des besoins et contraintes rencontrés.The control means further comprise, at two
Plus précisément et en référence à la
De plus, chaque module 44 est monté par l'intermédiaire d'une liaison filetée sur la tige de commande 40, qui remplit la fonction de vis sans fin. Par conséquent, en cas de mise en rotation de la tige 40 selon son propre axe, par l'intermédiaire de l'organe de commande 42, chacun des modules de retenue 40 se déplace relativement par rapport à la structure principale 5, selon la direction de l'axe 4.In addition, each
Le contact permanent entre la rampe de guidage 46 et son pion associé 48 est obtenu par le biais de moyens élastiques de rappel, du type ressort, de préférence ressort de compression. Cela est montré à titre d'exemple illustratif sur la
Il est noté que sur la
Avec une telle configuration, lorsque les modules 44 sont déplacés automatiquement en réponse à la rotation de la tige 40, chaque pion guidé 48 se déplace le long de sa rampe inclinée associée 46 avec laquelle il conserve le contact, grâce à l'action exercée en permanence par les ressorts 50. Cela est observé aussi bien lorsque l'on désire déplacer les éléments 10 vers leur position escamotée, c'est-à-dire lorsque la rotation de la tige 40 exercée conduit à rapprocher les pions 48 de la tige 40, que lorsque l'on désire déplacer les éléments 10 vers leur position déployée, c'est-à-dire lorsque la rotation de la tige 40 exercée conduit à éloigner les pions 48 de cette tige 40. Cette dernière phase traduit en particulier le fait que les chants libres 26 s'écartent de la structure principale 5, suite à un pivotement des éléments 10 selon leurs axes d'articulation respectifs 20.With such a configuration, when the
Enfin, il est indiqué, comme montré sur la
En référence à la
C'est ce corps latéral 110 qui définit la cavité de logement 112, à l'aide d'une surface intérieure latérale 114 de forme sensiblement cylindrique et de section circulaire, et d'axe confondu avec les axes 104 et 4 précités.It is this
Le procédé de chargement du dispositif 2 dans l'emballage 102, également objet de la présente invention, va être décrit en référence aux
Tout d'abord, avant l'introduction du panier dans la cavité de logement 112, les éléments mobiles 10 sont déplacés dans leur position escamotée à l'aide des moyens de commande décrits précédemment, afin de faciliter au mieux cette opération d'introduction du panier, généralement réalisée verticalement.First, before the introduction of the basket into the
Une fois cette introduction réalisée, le panier 2 se retrouve dans la configuration montrée schématiquement sur la
Par conséquent, il est mis en oeuvre une étape ultérieure de déploiement de cette structure mobile de conduction thermique, de sorte que chaque élément mobile de conduction thermique 10 de celle-ci vienne au contact de la surface latérale intérieure 114 pour assurer la fonction de transfert thermique, comme montré sur la
Cela est réalisé grâce à l'actionnement des moyens de commande par un opérateur, qui entraîne, sous l'action des ressorts prévus à cet effet, le pivotement simultané des éléments mobiles 10 selon leurs axes d'articulation 20, de manière à ce qu'ils s'écartent de l'axe 4.This is achieved by the actuation of the control means by an operator, which drives, under the action of the springs provided for this purpose, the simultaneous pivoting of the
Le contact obtenu entre chaque élément mobile 10 et la cavité 112 prend la forme d'un contact linéaire le long d'une génératrice commune aux surfaces 12 et 114, comme le montre schématiquement les références 116 sur la
Les chants longitudinaux libres 26 initialement en regard deux à deux se voient donc écartés les uns des autres, dans le sens où ils suivent le mouvement des éléments mobiles 10 s'écartant de l'axe 4 et de la structure principale 5, comme le montre la
Le déploiement des éléments mobiles 10 fait apparaître l'espace libre 52, qui est situé entre la surface intérieure latérale 122 de la portion de cylindre creux de l'élément mobile concerné 10, et la surface d'appui circonférentielle 124 définie par la périphérie des galettes 30, comme visible sur la
Une fois la structure mobile 8 déployée, la cavité 112 est ensuite fermée par le couvercle 108 du conteneur.Once the
En référence à présent aux
L'ensemble des caractéristiques techniques relatives au panier 2 décrit précédemment peuvent s'appliquer de façon identique ou similaire à l'emballage 102 qui va brièvement être présenté ci-après, et qui est également objet de la présente invention.All the technical characteristics relating to the
Ainsi, la surface intérieure latérale 114 délimitant la cavité de logement 112 est au moins partiellement définie par les surfaces intérieures latérales des éléments mobiles de conduction thermique 10, qui sont à présent montés articulés sur la structure principale 130 de l'emballage, et plus précisément sur une portion périphérique intérieure de celle-ci.Thus, the inner
Chaque élément mobile 10 est alors monté sur la structure principale 130 de manière à pouvoir être déplacé d'une position escamotée montrée sur la
Sur ces deux figures, on peut s'apercevoir que contrairement au mode de réalisation précédent, dans la position escamotée des éléments 10, les chants longitudinaux libres 26 en regard deux à deux sont sensiblement écartés les uns des autres, tandis que dans la position déployée des éléments 10 permettant le contact 116 avec la surface extérieure latérale 7 du panier 2, les chants longitudinaux libres 26 en regard deux à deux sont sensiblement rapprochés les uns des autres, voire en contact deux à deux.In these two figures, it can be seen that in contrast to the previous embodiment, in the retracted position of the
Bien entendu, diverses modifications peuvent être apportées par l'homme du métier à l'invention qui vient d'être décrite, uniquement à titre d'exemples non limitatifs.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 (17)
- A storage space device (2) for the transport and/or storage of nuclear materials, comprising a main structure (5) defining at least one housing (L) intended to contain said nuclear materials,
characterized in that it also includes a mobile heat conduction structure (8) forming at least one portion of a side outer surface (7) of said storage space device, said mobile heat conduction structure (8) comprising at least one mobile heat conduction component (10) mounted on said main structure (5) so as to be displaceable reversibly, from a retracted position to a deployed position, while moving away from said main structure (5). - The storage space device (2) according to claim 1, characterized in that in at least one longitudinal half-section of the storage space device passing through a longitudinal axis (4) of the latter and crossing the mobile heat conduction structure (8), the sum of the lengths (11) of each mobile component (10) of the crossed mobile structure, along the longitudinal axis (4) of the storage space device, accounts for at least 20% of a total length (12) of said storage space device along its longitudinal axis (4).
- The storage space device (2) according to claim 1 or to claim 2, characterized in that at least one mobile component (10) is jointedly mounted on said main structure (5), along a joint axis (20) parallel to a longitudinal axis (4) of said storage space device.
- The storage space device (2) according to claim 3, characterized in that said joint axis (20) crosses a peripheral portion of said main structure (5).
- The storage space device (2) according to any of preceding claims, characterized in that the side outer surface (12) of at least one mobile component (10) assumes the shape of an angular portion of a cylindrical surface with a longitudinal axis parallel to a longitudinal axis (4) of said storage space device, said angular portion being less than or equal to 180°.
- The storage space device (2) according to any of preceding claims, characterized in that at least one mobile component (10) is jointed on said main structure (5) at a longitudinal edge (22) of this component.
- The storage space device (2) according to any of preceding claims, characterized in that around a given longitudinal portion (18a-18c) of said main structure (5), said mobile structure (8) has a plurality of mobile heat conduction components (10) distributed peripherally.
- The storage space device (2) according to claim 7, characterized in that in the retracted position of each of said plurality of mobile heat conduction components (10), the latter form a peripheral casing around said given longitudinal portion (18a-18c).
- The storage space device (2) according to claim 8, characterized in that said peripheral casing of the given longitudinal portion (18a-18c) is formed by two, three or four mobile heat conduction components (10).
- The storage space device (2) according to any of preceding claims, characterized in that said mobile heat conduction structure (8) comprises a plurality of mobile heat conduction component (10) distributed along a longitudinal direction of the storage space device.
- The storage space device (2) according to any of preceding claims, characterized in that it comprises elastic return means (50) returning at least one mobile heat conduction component (10) towards its retracted position or towards its deployed position.
- The storage space device (2) according to any of preceding claims, characterized in that it includes control means with which the displacement of each mobile heat conduction component (10) may be generated from its retracted position to its deployed position, and vice versa, said control means being actuatable from the outside of the storage space device.
- The storage space device (2) according to claim 12, characterized in that said control means comprise a control rod (40) crossing said main structure (5) parallel to a longitudinal axis (4) of said storage space device.
- The storage space device (2) according to any of preceding claims, characterized in that it is applied to the transport and/or storage of fresh nuclear fuel assemblies.
- A package (102) comprising a housing cavity (112) of a storage space device (2) for the transport and/or storage of nuclear materials, said package comprising a main structure (130) and said housing cavity (112) being delimited by a side inner surface (114) of said package,
characterized in that it also includes a mobile heat conduction structure (8) forming at least one portion of said side inner surface (114) of the package, said mobile heat conduction structure (8) comprising at least a mobile heat conduction component (10) mounted on said main structure (130) so as to be displaceable, reversibly, from a retracted position to a deployed position while moving closer to a longitudinal axis (104) of said housing cavity (112). - A container (100) for the transport and/or storage of nuclear materials, this container comprising a package (102) as well as a storage space device (2) removably placed in said package, said package being a package according to claim 15, and/or said storage space device being a storage space device according to any of claims 1 to 14.
- A method for loading a storage space device (2) according to any of claims 1 to 14 in a package (102) so as to form a container (100) for the transport and/or storage of nuclear materials, the method comprising a step for introducing said storage space device (2) inside a housing cavity (112) defined by the package by means of an inner side surface (114) of the latter, characterized in that it also comprises a subsequent step for deploying said mobile heat conduction structure (8).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR0754551A FR2915307B1 (en) | 2007-04-18 | 2007-04-18 | CONTAINER FOR THE TRANSPORT AND / OR STORAGE OF NUCLEAR MATERIALS, THE CONTAINER COMPRISING A MOBILE THERMAL CONDUCTION STRUCTURE. |
PCT/EP2008/054635 WO2008135359A1 (en) | 2007-04-18 | 2008-04-17 | Container for transporting and/or storing nuclear material, said container including a mobile heat-conducting structure |
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EP2140460A1 EP2140460A1 (en) | 2010-01-06 |
EP2140460B1 true EP2140460B1 (en) | 2014-10-22 |
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EP08736305.7A Active EP2140460B1 (en) | 2007-04-18 | 2008-04-17 | Container for transporting and/or storing nuclear material, said container including a mobile heat-conducting structure |
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EP (1) | EP2140460B1 (en) |
JP (1) | JP5781304B2 (en) |
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ES (1) | ES2528208T3 (en) |
FR (1) | FR2915307B1 (en) |
WO (1) | WO2008135359A1 (en) |
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FR2961942B1 (en) * | 2010-06-25 | 2014-04-11 | Tn Int | CONTAINER FOR THE TRANSPORT AND / OR STORAGE OF RADIOACTIVE MATERIALS |
CN102290109B (en) * | 2010-06-30 | 2014-04-23 | 中国核电工程有限公司 | Multifunctional heat-dissipating structure for radioactive substance transportation containers |
DE102010044590B4 (en) | 2010-09-07 | 2022-04-21 | H. Lüdi + Co. Ag | Arrangement for ventilating a room, in particular a laboratory room, and using an air supply duct |
US20140361198A1 (en) | 2011-12-08 | 2014-12-11 | Atomic Energy Of Canada Limited/Énergie Atomique Du Canada Limitée | Apparatus for holding radioactive objects |
FR2985365B1 (en) * | 2011-12-29 | 2014-01-24 | Tn Int | THERMAL DRIVER FOR SIDE BODY FOR PACKAGING TRANSPORT AND / OR STORAGE OF RADIOACTIVE MATERIALS |
FR2988898A1 (en) * | 2012-03-28 | 2013-10-04 | Commissariat Energie Atomique | METHOD AND MOBILE DEVICE FOR REDUCING THERMAL RESISTANCE BETWEEN TWO SOLIDS |
FR3009762B1 (en) | 2013-08-14 | 2018-03-09 | Tn Int | ASSEMBLY COMPRISING A TRANSPORT PACKAGING OF RADIOACTIVE MATERIALS AND A PACKAGING SUPPORT CHASSIS |
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CN115597329A (en) * | 2022-10-13 | 2023-01-13 | 中国核电工程有限公司(Cn) | MOX assembly drying device and method |
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US4147938A (en) * | 1978-02-07 | 1979-04-03 | The United States Of America As Represented By The United States Department Of Energy | Fire resistant nuclear fuel cask |
DE2845129A1 (en) * | 1978-10-17 | 1980-04-30 | Transnuklear Gmbh | SHIELDING CONTAINER WITH NEUTRON SHIELDING FOR THE TRANSPORT AND / OR STORAGE OF BURNED FUEL ELEMENTS |
FR2630575B1 (en) * | 1988-04-21 | 1990-07-13 | Cit Alcatel | HOUSING FOR SUBMERSIBLE EQUIPMENT |
JPH0436697A (en) * | 1990-05-31 | 1992-02-06 | Kobe Steel Ltd | Transportation and storage container of used fuel and its manufacture |
JPH0539520A (en) * | 1991-08-05 | 1993-02-19 | Nkk Corp | Apparatus for charging additive into melting furnace for radioactive metal waste |
DE59902780D1 (en) * | 1999-06-19 | 2002-10-24 | Gnb Gmbh | Transport and / or storage containers for radioactive heat-generating elements |
JP2001153992A (en) * | 1999-11-30 | 2001-06-08 | Hitachi Ltd | Radioactive material housing container |
EP1122745A1 (en) * | 1999-12-15 | 2001-08-08 | GNB Gesellschaft für Nuklear-Behälter mbH | Container for shipping and/or storing radioactive heat releasing materials and method for producing the same |
DE59903429D1 (en) * | 1999-12-15 | 2002-12-19 | Gnb Gmbh | Process for producing a transport and / or storage container for radioactive objects |
JP2002022889A (en) * | 2000-07-05 | 2002-01-23 | Hitachi Zosen Corp | Spent nuclear fuel container |
JP2002098797A (en) * | 2000-09-26 | 2002-04-05 | Mitsubishi Heavy Ind Ltd | Canister and metallic storage vessel provided with it |
SE520672C2 (en) * | 2001-12-18 | 2003-08-12 | Oyster Internat Nv C O H B Man | Electrochromic device based on nanocrystalline materials |
JP2003240890A (en) * | 2002-02-14 | 2003-08-27 | Mitsubishi Heavy Ind Ltd | Radioactive substance storing vessel |
DE60335802D1 (en) * | 2002-07-23 | 2011-03-03 | Mitsubishi Heavy Ind Ltd | BARREL AND METHOD FOR ITS MANUFACTURE |
EP1418594A1 (en) * | 2002-11-09 | 2004-05-12 | GNB Gesellschaft für Nuklear-Behälter mbH | Transport and/or storage container for heat releasing radioactive elements |
JP4291588B2 (en) * | 2003-01-31 | 2009-07-08 | 株式会社神戸製鋼所 | Concrete cask and manufacturing method thereof |
JP2005010020A (en) * | 2003-06-19 | 2005-01-13 | Kobe Steel Ltd | Basket for transportation and storage cask of spent fuel |
NO321919B1 (en) * | 2004-08-19 | 2006-07-24 | Sicom As | Mounting device for underwater electronics |
JP2006105815A (en) * | 2004-10-06 | 2006-04-20 | Hitachi Ltd | Radioactive material container |
US7842247B2 (en) * | 2005-08-19 | 2010-11-30 | Canadian Blood Services | Sample holder for dynamic light scattering |
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2007
- 2007-04-18 FR FR0754551A patent/FR2915307B1/en not_active Expired - Fee Related
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2008
- 2008-04-17 JP JP2010503492A patent/JP5781304B2/en not_active Expired - Fee Related
- 2008-04-17 EP EP08736305.7A patent/EP2140460B1/en active Active
- 2008-04-17 US US12/595,499 patent/US9200839B2/en active Active
- 2008-04-17 CN CN2008800125870A patent/CN101681688B/en active Active
- 2008-04-17 WO PCT/EP2008/054635 patent/WO2008135359A1/en active Application Filing
- 2008-04-17 ES ES08736305.7T patent/ES2528208T3/en active Active
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FR2915307A1 (en) | 2008-10-24 |
US20100119029A1 (en) | 2010-05-13 |
ES2528208T3 (en) | 2015-02-05 |
CN101681688A (en) | 2010-03-24 |
WO2008135359A1 (en) | 2008-11-13 |
JP2010525309A (en) | 2010-07-22 |
EP2140460A1 (en) | 2010-01-06 |
JP5781304B2 (en) | 2015-09-16 |
US9200839B2 (en) | 2015-12-01 |
CN101681688B (en) | 2012-08-08 |
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