EP1257482A1 - Structure de paroi amortisseuse de choc a haute energie et conteneur utilisant une telle structure - Google Patents
Structure de paroi amortisseuse de choc a haute energie et conteneur utilisant une telle structureInfo
- Publication number
- EP1257482A1 EP1257482A1 EP01907782A EP01907782A EP1257482A1 EP 1257482 A1 EP1257482 A1 EP 1257482A1 EP 01907782 A EP01907782 A EP 01907782A EP 01907782 A EP01907782 A EP 01907782A EP 1257482 A1 EP1257482 A1 EP 1257482A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- studs
- high energy
- wall structure
- shock absorbing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000035939 shock Effects 0.000 title claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 230000001413 cellular effect Effects 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 2
- 239000013056 hazardous product Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 16
- 238000013016 damping Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 11
- 239000006096 absorbing agent Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 239000002023 wood Substances 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 240000007182 Ochroma pyramidale Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F5/00—Transportable or portable shielded containers
- G21F5/06—Details of, or accessories to, the containers
- G21F5/08—Shock-absorbers, e.g. impact buffers for containers
-
- 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
- B65D81/05—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 maintaining contents at spaced relation from package walls, or from other contents
- B65D81/107—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 maintaining contents at spaced relation from package walls, or from other contents using blocks of shock-absorbing material
Definitions
- the field of the invention is that of transporting objects by container, that is to say in cases where it is necessary to take precautions to protect against damage to the objects transported.
- the invention relates in particular to the containers constituting a specific protective envelope resistant to various attacks which transport packages can undergo during their journey, for example falls.
- transport containers having walls or shock absorbing parts, which, in the event of impact or fall, absorb the energy due to impact and prevent the object (s) from being damaged.
- Containers of the “low energy” type, designed to withstand falls from a height of less than one meter. If V is the speed of the package at the time of impact (V ⁇ 5 m / s). In this category of containers, the masses are generally less than a tonne. As a result, the impact energy is less than a kilojoule. In this category, there are containers sized to support the inevitable falls related to the handling, whatever it is, of objects. The impact is generally absorbed by a shock absorbing device of compressible material, of the elastomer type, placed inside or outside the container. The crushing of this material protects the object to be transported.
- the “medium energy” type containers must endure falls whose height is greater than one meter (V> 5 m / s).
- V> 5 m / s the mass of the package, consisting of the container and its contents, can reach several tonnes and the impact energy is between the kilojoule and the megajoule.
- the containers In this category are the containers sized to be able to withstand accidental drops, linked to the handling of the transported objects.
- the container has a structure dimensioned so as to be able to deform substantially on impact from the fall so as not to damage the object transported.
- a shock absorber to limit the shock transmitted to the object. This shock absorber is placed at inside or outside the container and is made of deformable material, for example wood or balsa.
- the “high energy” type containers must withstand falls the height of which is greater than ten meters (V> 10 m / s). The masses of the packages can then reach several tens of tonnes and the impact energy is greater than one megajoule.
- V> 10 m / s ten meters
- the masses of the packages can then reach several tens of tonnes and the impact energy is greater than one megajoule.
- In this category are containers sized to withstand accidental drops during air transport. The structure of such a container must be able to deform, but reasonably, at the impact of the fall, so as not to damage the object contained.
- Such a container requires the use of a shock absorber to minimize the effect of the shock vis-à-vis the object transported.
- the absence of material of intermediate stiffness between wood and metal generally leads to choosing, by default, wood as damping material.
- the main purpose of the present invention is to propose, for this latter category of “high energy” type containers, walls or damping structures intermediate between the solutions using wood and those using metals.
- a first main object of the invention is a high energy shock absorbing wall structure, mainly consisting of a support structure in which metal studs are regularly distributed, the distribution of the studs in the support structure depending on the crush resistance to be obtained.
- This crush resistance is also defined according to the transport conditions and the objects transported.
- the supporting structure is cellular, the studs being placed in certain cells.
- this alveolar support structure is a honeycomb structure.
- One of the materials chosen to make this alveolar support structure is aluminum.
- the supporting structure In a special embodiment of the supporting structure, several layers are used superimposed and dimpled, the studs being offset from one another, from one layer to the other.
- a second main object of the invention is a transport container that must withstand significant drops and comprising at least one wall made up, at least in part, of a wall structure defined in the preceding paragraphs to absorb high energy shocks .
- a particular embodiment of this container is provided for transporting elongated objects, such as fuel rods from nuclear power plants.
- the container is in the form of a cylindrical body, closed at these two ends, the walls of which are covered by a structure, as defined in the paragraphs above.
- a retaining cover can cover and hold each damping structure.
- FIG. 1 in section, the principle of a transport container with global protection
- FIG. 2 a diagram of the distribution of the pads, in the honeycomb structure according to the invention
- Figure 3 a pad used in the honeycomb structure according to the invention
- Figure 4 in perspective view, an embodiment of the structure according to the invention with several layers;
- Figure 1 shows in section a container of the high energy type according to the invention. It mainly comprises a rigid structure 3 made up of several relatively thick walls and forming a closed box or box. Inside it are wedging elements 2 for immobilizing the object to be transported 1 positioned in the center of the container, optimally.
- the wall structure according to the invention mainly consists of a honeycomb carrier structure 4, for example of the hexagonal type, of the honeycomb type.
- This supporting structure 4 is made of metal, for example aluminum, and therefore does not have a significant mass, taking into account the large number of empty spaces, constituted by the cells 6. It has the function of keeping studs in place 5, divided from uniformly throughout the supporting structure 4.
- studs 5 are arranged in a row so that these studs 5 are uniformly distributed, for example, so that each stud 5 is separated from another by three empty cells 6.
- the filling rate thus obtained is of the order of 15%. It depends on the surface of the studs in relation to the total surface.
- the impact of the container on the ground or on any obstacle depends on the mass M of the container and the object to be protected, on the impact speed V, on the working surface S of the container when it is crushed and the acceptable thickness of the crash E of the shock absorber.
- the damping surface can be characterized by a plastic compression level ideal for crushing ⁇ pa ⁇ .
- the structure of the container and the object to be protected must be able to withstand an acceleration ⁇ max without unacceptable distortion. Using the following two approximate formulas:
- ⁇ pa ⁇ ⁇ SM we can determine the range of values to define the plastic bearing of the damping material to be used. We therefore deduce that ⁇ pa ⁇ is between 25 and 300 megapascals.
- the studs 5 are preferably metallic and can be of a cylindrical shape. It is also possible to consider using spherical shapes or shapes adapted to the shape of the cells 6 of the carrier structure 4 honeycomb. The height, or in general, the dimensions of the pads 5 are adjusted as a function of the forces generated locally by the crushing upon impact. Lead, tin, steel, titanium are among the many metals that can be used in this type of wall. The choice of metal results, among other things, from the preexisting structure of the container and from the secondary or possible uses of the damping wall, for example a "radiator" function, promoting heat exchanges.
- an advantageous embodiment of the damping structure according to the invention consists of several layers. More precisely, several layers 7 N , 7 N + ⁇ , ... load-bearing structures, symbolized by plates drawn in phantom, are superimposed. They each contain a certain number of studs 5, distributed regularly in the manner explained above. It should be noted that the 5 N pads of a 7 N layer should not be superimposed above the 5 N + ⁇ pads of the 7 N + ⁇ layer or of the layers which are directly adjacent to it. On the contrary, it is essential to offset the pads 5 N + ⁇ in each layer 7 N + ⁇ relative to the positioning of the pads 5 N of the adjacent layer 7 N.
- the pads 5 N of the layer 7 N are offset by a distance equal to half the distance separating them, relative to the pads 5 N + ⁇ of the layer 7 N + i directly adjacent.
- the 5 N pads will tend to deform the 7 N + i layer lying just behind, at a place where there is no 5 N + ⁇ pad carried by the latter.
- the 5 N + ⁇ pads will tend to deform the 7 N layer located in front, since no 5 N pad will be located directly opposite.
- the characteristics of the damping structure, thus formed result from the stacking of a certain number of layers 7 N , 7 N + n 7 + 2r-f and ⁇ e ⁇ - with distribution of the pads 5 N , 5 N + i , 5 N + 2 , - » / found in each of them.
- the protection thereof may only be local, when the direction of impact is known in advance.
- a container capable of transporting an elongated object 10 the length of which exceeds several meters.
- the specifications impose to resist an impact at a speed of 90 meters / second, the total mass of the container and its object being of the order of 20 tonnes, the diameter of the impact being l 'order of 2 meters.
- This container mainly comprises a case 11, in which the object 10 is placed, preferably doubled by an external body 12. The assembly is closed at its ends. These are each covered with a determined thickness of the defined damping structure previously and referenced 13. The latter may possibly be: r covered with a retaining cover 14.
- the modular nature of the supporting structures used in the structure according to the invention makes it possible to easily change the occupancy rate of the studs or the nature of these studs. It is thus possible to play on the compression characteristic ⁇ e of the material constituting the studs and on their thickness to reach the desired plastic compression level ⁇ pa ⁇ .
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
- Buffer Packaging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0001833A FR2804941B1 (fr) | 2000-02-15 | 2000-02-15 | Structure de paroi amortisseuse de choc a hauteur energie et conteneur utilisant une telle structure |
| FR0001833 | 2000-02-15 | ||
| PCT/FR2001/000418 WO2001060713A1 (fr) | 2000-02-15 | 2001-02-14 | Structure de paroi amortisseuse de choc a haute energie et conteneur utilisant une telle structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1257482A1 true EP1257482A1 (fr) | 2002-11-20 |
| EP1257482B1 EP1257482B1 (fr) | 2004-05-06 |
Family
ID=8846995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01907782A Expired - Lifetime EP1257482B1 (fr) | 2000-02-15 | 2001-02-14 | Structure de paroi amortisseuse de choc a haute energie et conteneur utilisant une telle structure |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6953125B2 (fr) |
| EP (1) | EP1257482B1 (fr) |
| FR (1) | FR2804941B1 (fr) |
| WO (1) | WO2001060713A1 (fr) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2835958B1 (fr) * | 2002-02-11 | 2004-11-26 | Transnucleaire | Paroi de protection a blindage anti-poincon pour conteneur et conteneur comprenant au moins une telle paroi |
| DE502004009351D1 (de) † | 2004-03-06 | 2009-05-28 | Nuklear Service Gmbh Gns | Transport- und/oder Lagerbehälter mit zumindest einem radioaktiven Element |
| US7624887B2 (en) * | 2006-09-01 | 2009-12-01 | D.J. Avery Group, Inc. | Reusable transport packaging |
| JP2011247701A (ja) * | 2010-05-25 | 2011-12-08 | Mitsubishi Heavy Ind Ltd | 放射性物質格納容器 |
| FR3006098B1 (fr) * | 2013-05-22 | 2015-06-26 | Tn Int | Emballage d'entreposage de combustible irradie comprenant des rails amortis de guidage d'etui |
| US9721688B2 (en) * | 2014-02-12 | 2017-08-01 | Bwxt Mpower, Inc. | Lift-based up-ender and methods using same to manipulate a shipping container containing unirradiated nuclear fuel |
| DE102014118344B3 (de) * | 2014-12-10 | 2016-02-18 | Areva Gmbh | Schockabsorber für Transport- und/oder Lagerbehälter für Brennelemente und/oder brennstoffenthaltende Gebinde und Brennelement und/oder brennstoffenthaltendes Gebinde sowie Transport- und/oder Lagerbehälter für Brennelemente und/oder brennstoffenthaltende Gebinde |
| FR3042902B1 (fr) * | 2015-10-22 | 2017-12-22 | Cockerill Maintenance & Ingenierie Sa | Dispositif de stockage de materiaux dangereux |
| US12548686B2 (en) | 2022-09-13 | 2026-02-10 | Holtec International | System for transporting radioactive materials |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US386696A (en) * | 1888-07-24 | Howaed p | ||
| US3054524A (en) * | 1958-01-28 | 1962-09-18 | James W Casten | Jacketed vessel and method of producing same |
| US3072022A (en) * | 1961-10-30 | 1963-01-08 | Davis M Wood | Missile container suspension system |
| DE3028424C2 (de) * | 1980-07-26 | 1984-05-30 | Transnuklear Gmbh, 6450 Hanau | Stoßdämpfer |
| IL62441A (en) * | 1981-03-20 | 1984-04-30 | Urdan Ind Ltd | Ammunition storage system and container for use therein |
| EP0595887B1 (fr) * | 1991-07-01 | 1998-12-02 | Raven Marketing, Inc. | Structure d'amortissement |
-
2000
- 2000-02-15 FR FR0001833A patent/FR2804941B1/fr not_active Expired - Fee Related
-
2001
- 2001-02-14 EP EP01907782A patent/EP1257482B1/fr not_active Expired - Lifetime
- 2001-02-14 US US10/182,405 patent/US6953125B2/en not_active Expired - Fee Related
- 2001-02-14 WO PCT/FR2001/000418 patent/WO2001060713A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0160713A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2001060713A1 (fr) | 2001-08-23 |
| US20030015541A1 (en) | 2003-01-23 |
| EP1257482B1 (fr) | 2004-05-06 |
| FR2804941A1 (fr) | 2001-08-17 |
| US6953125B2 (en) | 2005-10-11 |
| FR2804941B1 (fr) | 2002-05-03 |
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