EP3042378B1 - Colis comprenant des moyens ameliores d'amortissement de choc entre un ensemble renfermant des matieres radioactives et le couvercle de l'emballage - Google Patents

Colis comprenant des moyens ameliores d'amortissement de choc entre un ensemble renfermant des matieres radioactives et le couvercle de l'emballage Download PDF

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Publication number
EP3042378B1
EP3042378B1 EP14759177.0A EP14759177A EP3042378B1 EP 3042378 B1 EP3042378 B1 EP 3042378B1 EP 14759177 A EP14759177 A EP 14759177A EP 3042378 B1 EP3042378 B1 EP 3042378B1
Authority
EP
European Patent Office
Prior art keywords
package
packaging
cover
package according
radioactive materials
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.)
Active
Application number
EP14759177.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3042378A1 (fr
Inventor
Cyril BABINET
Pierre-Olivier PONTET
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GNS Gesellschaft fuer Nuklearservice mbH
TN International SA
Original Assignee
TN International SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TN International SA filed Critical TN International SA
Publication of EP3042378A1 publication Critical patent/EP3042378A1/fr
Application granted granted Critical
Publication of EP3042378B1 publication Critical patent/EP3042378B1/fr
Active legal-status Critical Current
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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F5/00—Transportable or portable shielded containers
    • G21F5/06—Details of, or accessories to, the containers
    • G21F5/08—Shock-absorbers, e.g. impact buffers for containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • 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
    • 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
    • G21F5/12—Closures for containers; Sealing arrangements

Definitions

  • the present invention relates to the field of packages of radioactive materials, comprising a package and an assembly containing radioactive material housed in a cavity defined by the package.
  • This set may for example include waste cases or assemblies of nuclear fuel.
  • a package for storing and / or transporting radioactive material generally comprises, as outer shell, a package having a lateral body, a bottom and a lid. These parts of the package define a housing cavity of a set containing radioactive materials, for example a basket housing nuclear fuel assemblies or waste cases.
  • the safety demonstration of the packaging in charge of the assembly is based in particular on regulatory fall tests. For the case of a fall from a height of 9 meters in the direction of the axis of the package passing through the bottom and the lid of the latter, on the head damping cover covering the lid of the package, the The total mass of the assembly containing the radioactive materials presses on the same cover during the impact on the ground. During this fall called “axial drop”, very significant efforts are generated in the closing system of the lid on the lateral body of the package. In particular, the fixing screws are highly stressed, and under certain conditions, the mobile assembly in the cavity of the package can impact the lid with a particularly damaging effect on the closure system.
  • Such a system is known from the document JP 2011013035 A .
  • a system comprises at least one deformable damping device and a biasing device associated with this damping device.
  • the two aforementioned devices are respectively fixed on the assembly containing the radioactive materials and on the inner surface of the lid.
  • each case placed next to the cover incorporates a deformable damping device while facing the latter, it is placed a wedge-shaped biasing device, fixed on the inner surface of the lid.
  • the invention therefore aims to at least partially overcome the disadvantages mentioned above, relating to the achievements of the prior art.
  • the subject of the invention is a package comprising a packaging for storing and / or transporting radioactive materials and an assembly containing radioactive materials housed in a cavity of the package extending along a longitudinal axis. of the package and being closed by a cover traversed by this axis, the package comprising a shock-absorbing system of the assembly against the cover, the system comprising at least one plastically deformable damping device and a device biasing said deformable damping device.
  • one of the biasing device and deformable damping device is mounted movably on the lid in a plane orthogonal to the axis of the package, and has self-centering means relative to the other of the two devices provided on said assembly containing the radioactive materials.
  • the invention thus makes it possible to obtain satisfactory relative positioning of the two devices of the damping system, whatever the position of the assembly containing the radioactive materials in the cavity of the package. This results in a better efficiency of the damping system, without requiring a precise positioning of the assembly in the cavity. Therefore, the invention provides a simple and clever solution to meet on the one hand the operational constraints during loading and on the other hand the manufacturing constraints encountered with the designs of the prior art.
  • said biasing device is also a deformable damping device.
  • said biasing device in the event of an axial drop on the cover, its deformation makes it possible to dissipate even better the mechanical energy of fall.
  • each of the two devices then performs on the one hand a deformable damper function, and other by a biasing function of the other device.
  • the assembly comprises a storage basket as well as devices containing radioactive materials placed in housings defined by said basket, and said other of the two devices is provided on one of the devices containing radioactive materials or on said basket.
  • said devices containing radioactive materials can be placed directly in the cavity of the package without a storage basket.
  • said other of the two devices is integrated with one of the devices containing radioactive materials, preferably at an end dedicated to its handling. Also, it is preferably done so that the handling end of the device containing radioactive materials is provided to dampen the shock in case of axial drop on the lid.
  • each device containing radioactive material takes the form of a nuclear fuel assembly or a radioactive waste case.
  • said set containing radioactive materials comprises a plurality of cases, stacked and divided into several columns. It is further associated with each column of cases, a deformable damping device and its associated biasing device.
  • the deformable damping device and its associated biasing device respectively have two frustoconical surfaces of self-centering, axes parallel to the axis of the package.
  • said deformable damping device has one or a plurality of plastically deformable damping elements arranged between two force distribution plates.
  • said deformable damping device has an annular overall shape, said plastically deformable damping elements being distributed circumferentially along the damping device.
  • said deformable damping device comprises a mounting plate fixed on the lid of the package, said mounting plate covering a movable plate of said deformable damping device, said movable plate being movable in a plane orthogonal to the axis of the package in a space defined between the mounting plate and the cover.
  • said biasing device which comprises a mounting plate fixed on the lid of the package, the mounting plate covering a movable plate of said biasing device, said movable plate being movable in a plane orthogonal to the axis of the package in a space defined between the mounting plate and the lid.
  • the space takes the form of an annular slot open radially outwards.
  • damping / biasing device may for example be legs or tongues through stirrups or the like with side games to provide mobility for self-centering.
  • said movable plate mentioned above is one of said force distribution plates of the deformable damping device.
  • the design remains simple since when this plate is annular, it is not necessary to mount additional elements to cooperate with the space defined between the mounting plate and the cover. Indeed, the outer periphery or the inner periphery of this annular plate can be housed with clearance in the aforementioned space.
  • said plastically deformable damping elements are made of aluminum or one of its alloys.
  • the invention also relates to a method of closing a package as described above, comprising a step of self-centering the deformable damping device relative to its associated solicitation device, the step of self-centering being performed automatically by moving said one of the device biasing and deformable damping device relative to the lid, in a plane orthogonal to the axis of the package, when mounting the lid on a lateral body of the package.
  • FIG. 1 With reference first to figures 1 and 2 there is shown a package 100 for storing and / or transporting radioactive material in the form of a preferred embodiment of the present invention.
  • the package comprises first a package 1 provided with a lateral body 2, a bottom 4 and a lid 6 closing an opening of the package opposite the bottom 4.
  • the package has a longitudinal axis 8 centered relative to the side body 2, and through the lid and the bottom of the same packaging.
  • the package forming the outer envelope of the package defines a cavity 10 for housing a set 12 containing radioactive material.
  • This assembly 12 also centered on the axis 8, here comprises a storage basket 14 and a plurality of devices containing the radioactive materials which are here waste cases 16.
  • the cases are here stacked and divided into several columns, each column may for example have two to five cases stacked on each other, preferably by interlocking their ends facing two by two.
  • the package may be equipped with damping hoods 20 respectively protecting the lid 6 and the bottom 4 of the package.
  • Patties 22 incorporating the radioactive waste are placed inside a space defined by a side wall 24, at the ends of which is a leading end 26 and a bottom end 28.
  • the leading end 26 has a projecting shape
  • the bottom end 28 has a recess, these two ends of substantially complementary shapes being provided to fit the holsters on each other, to form the columns. aforementioned cases.
  • the head end it is shaped to allow the handling of the case.
  • the end 26 takes a generally mushroom shape defining an annular plug 30 open radially outwardly. Upward, this plug 30 is defined by an upper plate 32, while downwards, it is defined by an annular plate continuing with a portion forming a frustoconical surface 34 of axis corresponding to the axis of the case 16. At this end end 26, the plate defining the surface 34 then joins the side wall 24, with the aid of a portion defining an annular groove 36 open radially outwardly.
  • this damping system 40 is broken down into several subsystems 40 'each associated with one of the columns of cases 16.
  • the leading end 26 allowing the handling of the holster forms both a deformable damping device in the event of impact, and a device for biasing another deformable damping device 42 mounted on the cover 6. Therefore, it should be understood that in each subsystem 40 ', the device 42 is both a deformable damping device intended to be biased by the upper end 26 forming a biasing device, and on the other hand constitutes a device for biasing this damping device deformable 26 formed by the leading end of the holster.
  • the two devices 26, 42 are intended to solicit mutually in case of axial drop occurring at the head of the package, which allows them to deform plastically both and thus absorb the best mechanical energy shock that is related to the fall, as this will be explained in more detail below.
  • the deformable damping device 42 is movably mounted on the inner surface of the lid 6, in a plane orthogonal to the axis 8.
  • the device 42 can be moved relative to the cover, by means of a suitable mechanical connection represented only schematically on the figure 1 , and identified by the reference numeral 48.
  • the latter has self-centering means with respect to the device 26, these self-centering means being here made using a frustoconical surface 50 intended to cooperate with the frustoconical surface 34 of the device 26 forming the handling end of the case 16.
  • the two devices 42, 26 allow their self-centering through the mobile mounting device 42 on the cover 6, and by the implementation of two frustoconical self-centering surfaces 50, 34, preferably coaxial axis parallel to the axis 8.
  • the biasing device 26 intended to cooperate with the deformable damping device 42 is provided on the upper case of the column associated with the subsystem 40 '.
  • the device 26 could then surround the opening of the associated housing 18, at an upper end of the basket 14.
  • FIGS. 4a and 4b schematically different successive steps of a package closing process.
  • This method comprises a self-centering step of the deformable damping device 42 relative to the biasing device 26, the latter, because of its large mass, then being immobile throughout the closing step.
  • This self-centering step is performed automatically by moving the device 42 relative to the cover 6, thanks to the connection 48, as shown schematically by the arrow 54 on the figure 4b .
  • This automatic displacement in the plane orthogonal to the axis 8 is the result of the cooperation between the two self-centering surfaces 34, 50, the self-centering being obtained progressively as the cover 6 is set in place on the side body of the package.
  • the positioning of the cover 6 axially in the direction of the casing columns 16 is shown schematically by the arrow 56 on the figure 4a .
  • the deformable damping device 42 allows optimal operation in case of shock occurring during an axial fall of the package. This provides a satisfactory damping of the shock of the assembly 12 against the lid, thus ensuring the sealing of the cavity 10 forming containment. Indeed, thanks to the dissipation of the mechanical energy of shock of this assembly 12 against the cover 6, the attachment means of the latter on the lateral body 2 of the package 1 can better withstand the risk of radiological leakage and / or detaching the lid.
  • this device has a generally annular shape, of axis parallel to the longitudinal axis of the package.
  • the device 42 has a plurality of damping elements 60 which here take the form of solid or hollow cylinders made of aluminum or one of its alloys, or else any other material known for its shock-absorbing properties by plastic deformation.
  • Each cylinder 60 has at its two opposite ends pins 62 which are housed in complementary recesses provided on two plates 64, 66 of force distribution.
  • the plate 64 is provided at the interface with the lid 6, preferably near or in contact with the inner surface 46 of the same lid.
  • the other force distribution plate 66 is here incorporated into an annular piece 63 defining, opposite the plate 66, the frustoconical self-centering surface 50.
  • the damping elements 60 are thus inserted between the two plates. 64, 66, and uniformly distributed in the circumferential direction along the damping device 42.
  • a mounting plate 70 fixedly assembled on the same surface 46, using fasteners 72 of the screw type.
  • the mounting plate 70 generally disk-shaped, has a central portion bearing against the surface 46 of the cover, and at the periphery of this central portion, a recess for presenting an annular end 70 'away from the surface 46. Indeed, between this end portion 70 'of the plate 70 and the surface 46, there is defined a space 74 in the form of an annular slot open radially outwardly.
  • the inner diameter of the inner periphery 64' is strictly greater than the outer diameter of the bottom of the slot open radially outwardly .
  • the clearance provided between these two elements is preferably retained so as to obtain a displacement of the damping device 42, with respect to a centered position of the same device on the mounting plate 70, for example up to 30mm and this in each of the directions of the plane orthogonal to the axis 8 of the package.
  • the force distribution plate 64 has orifices for receiving the pins 62 of the deformable elements 60, but also has tabs 78 orthogonal to the plane of the plate. These tongues 78 preferably result from a cutting within the plate 64, continued by folding at 90 degrees of each tab obtained. These fixing tongues 78, which are here four in number, are intended to ensure the attachment of the plate 64 on the annular piece 63, for example by welding.
  • this same annular piece 63 has several tabs 80 which are fixedly attached to it, preferably by welding, and which are provided to be able to participate in the self-centering of the device 42 relative to the corresponding case column.
  • these tabs 80 have a terminal shape inclined to approach the axis of the device 42 in the direction of the force distribution plate 64.
  • These pre-centering tongues 80 are located radially towards the internal to the frustoconical self-centering surface 50 of the annular piece 63, and allow for example to cooperate with the end plate 32 of the upper case of each column, when placing the cover on the lateral body of the package.
  • the annular piece 63 may have another frustoconical surface 50 ', adjacent the surface 50 and forming therewith a V whose tip is oriented towards the case column.
  • the surface 50 ' is also provided to participate in the self-centering of the device 42 relative to the corresponding case column, cooperating with a complementary frustoconical surface 50 "made at the entrance of the housing 18, and shown on the figure 1 .
  • Figures 9a to 9c schematically different steps of a package closing process when it is equipped with the deformable damping device 42 shown on the figures 6 and 7 .
  • the self-centering of the device 42 can be achieved by the cooperation of the frustoconical surfaces 50, 34, and / or by the cooperation frustoconical surfaces 50 ', 50 ", and / or by the cooperation of the tabs 80 with the plate
  • the order in which they intervene may be random, depending on the initial position of the cover. damping device 42 on the lid, and the position of the column of cases 16 in the housing 18.
  • FIG 8a it is shown the cooperation between these two devices 42, 26 before the fall, when the frustoconical surfaces of self-centering 50, 34 cooperate with each other by being in contact.
  • the entire device 26 which deforms, in particular by folding at the annular groove 36 provided for this purpose.
  • the deformable damping elements 60 are compressed between the two force distribution plates 64, 66, which leads to their crushing allowing the dissipation of the impact energy.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Mechanical Engineering (AREA)
  • Buffer Packaging (AREA)
  • Vibration Dampers (AREA)
EP14759177.0A 2013-09-05 2014-09-04 Colis comprenant des moyens ameliores d'amortissement de choc entre un ensemble renfermant des matieres radioactives et le couvercle de l'emballage Active EP3042378B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1358506A FR3010226B1 (fr) 2013-09-05 2013-09-05 Colis comprenant des moyens ameliores d'amortissement de choc entre un ensemble renfermant des matieres radioactives et le couvercle de l'emballage
PCT/EP2014/068815 WO2015032848A1 (fr) 2013-09-05 2014-09-04 Colis comprenant des moyens ameliores d'amortissement de choc entre un ensemble renfermant des matieres radioactives et le couvercle de l'emballage

Publications (2)

Publication Number Publication Date
EP3042378A1 EP3042378A1 (fr) 2016-07-13
EP3042378B1 true EP3042378B1 (fr) 2017-08-16

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Family Applications (1)

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EP14759177.0A Active EP3042378B1 (fr) 2013-09-05 2014-09-04 Colis comprenant des moyens ameliores d'amortissement de choc entre un ensemble renfermant des matieres radioactives et le couvercle de l'emballage

Country Status (9)

Country Link
US (1) US10192647B2 (es)
EP (1) EP3042378B1 (es)
JP (1) JP6486937B2 (es)
CN (1) CN105518801B (es)
CA (1) CA2922865C (es)
ES (1) ES2648100T3 (es)
FR (1) FR3010226B1 (es)
TW (1) TWI631577B (es)
WO (1) WO2015032848A1 (es)

Cited By (1)

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US11289229B2 (en) 2019-12-09 2022-03-29 Holtec International Nuclear fuel storage system with integral shimming

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ES2616735T3 (es) * 2015-02-26 2017-06-14 GNS Gesellschaft für Nuklear-Service mbH Contenedor destinado a recibir un inventario radiactivo y procedimiento para fabricar dicho contenedor
JP6754586B2 (ja) * 2016-02-17 2020-09-16 太平洋セメント株式会社 放射性物質含有廃棄物収容容器
TWI718682B (zh) * 2019-09-25 2021-02-11 仁寶電腦工業股份有限公司 旋轉式擴充架
FR3101474B1 (fr) * 2019-09-27 2021-09-17 Tn Int Panier de rangement pour matières radioactives, à conception simplifiée conférant des propriétés améliorées de transfert thermique
FR3134222B1 (fr) * 2022-04-05 2024-02-16 Orano Nuclear Packages And Services Colis comprenant un emballage pour le transport et/ou l’entreposage d’un contenu radioactif, et comportant un systeme amortisseur interne a encombrement reduit

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US11289229B2 (en) 2019-12-09 2022-03-29 Holtec International Nuclear fuel storage system with integral shimming
US11670430B2 (en) 2019-12-09 2023-06-06 Holtec International Nuclear fuel storage system with integral shimming

Also Published As

Publication number Publication date
JP6486937B2 (ja) 2019-03-20
CN105518801B (zh) 2017-10-31
US20160225474A1 (en) 2016-08-04
JP2016529522A (ja) 2016-09-23
ES2648100T3 (es) 2017-12-28
EP3042378A1 (fr) 2016-07-13
WO2015032848A1 (fr) 2015-03-12
US10192647B2 (en) 2019-01-29
CA2922865C (fr) 2021-12-14
CN105518801A (zh) 2016-04-20
TWI631577B (zh) 2018-08-01
FR3010226A1 (fr) 2015-03-06
FR3010226B1 (fr) 2017-12-29
TW201517054A (zh) 2015-05-01
CA2922865A1 (fr) 2015-03-12

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