EP1005049A1 - Stossdämpfungsvorrichtung für einen Behälter zum Einschluss von radioaktiven Stoffen - Google Patents

Stossdämpfungsvorrichtung für einen Behälter zum Einschluss von radioaktiven Stoffen Download PDF

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Publication number
EP1005049A1
EP1005049A1 EP99402871A EP99402871A EP1005049A1 EP 1005049 A1 EP1005049 A1 EP 1005049A1 EP 99402871 A EP99402871 A EP 99402871A EP 99402871 A EP99402871 A EP 99402871A EP 1005049 A1 EP1005049 A1 EP 1005049A1
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EP
European Patent Office
Prior art keywords
parts
symmetry
elementary
container
cover
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.)
Withdrawn
Application number
EP99402871A
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English (en)
French (fr)
Inventor
Dominique Francois
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.)
TN International SA
Original Assignee
Societe pour les Transports de lIndustrie Nucleaire Transnucleaire 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 Societe pour les Transports de lIndustrie Nucleaire Transnucleaire SA filed Critical Societe pour les Transports de lIndustrie Nucleaire Transnucleaire SA
Publication of EP1005049A1 publication Critical patent/EP1005049A1/de
Withdrawn legal-status Critical Current

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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
    • G21F5/08—Shock-absorbers, e.g. impact buffers for containers
    • 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

Definitions

  • the invention relates to shock absorbing devices arranged around radioactive material containers (or packaging), especially those with a mass ranging from a few tonnes to more than 100 or 150 tonnes, generally used for the transport and / or storage of spent nuclear fuel or for all other radioactive materials; these devices allow the so-called packaging to withstand regulatory drop tests under conditions as they meet the safety criteria required by regulations applicable for the transport and storage of said radioactive material.
  • Containers for transporting and / or storing irradiated fuel or all other radioactive material often involves, due to the need for a shielding against radiation, thick metal walls (e.g. several centimeters to several tens of centimeters) made of steel or cast iron iron, and therefore have a high mass which can range from a few tonnes to over 150 tonnes.
  • these metal containers have at least one ferrule thick cylindrical, inside which the radioactive material takes place or the combustible elements, closed at its two ends by a bottom and a also thick cover. They are usually handled using pins attached to the ferrule.
  • the cylindrical shell can have a cross section circular or polygonal (rectangular, square ).
  • shock absorbing devices to enable them to withstand the tests prescribed by the applicable regulations, in particular the so-called free fall tests from a height of 9 meters.
  • the shock absorbers must be designed to be effective in all possible angles of fall.
  • these damping devices include metal covers which cover the ends of the container projecting beyond the metal body, which allows to take into account not only vertical falls along the longitudinal axis of the container, but also lateral (along a perpendicular axis above) or oblique (on the end angles of the container).
  • FIG. 1 shows an example of a known shock absorbing device, covering the end of a container comprising a ferrule (1) closed by a cover (2) and can be manipulated using the pins (3).
  • Said damping device comprises a metal cover (4) divided into compartments filled with pieces of wood (5) including fibers have a chosen orientation to provide effective cushioning in several directions; we see that the result is limited to obtaining amortization effective only when the stress caused by the shock is exerted in one direction parallel to the fibers. So with this shock absorbing device it is not possible to obtain isotropic damping (that is to say of the same efficiency whatever the angle of fall) over the entire surface of the hood.
  • the applicant sought a device providing shock absorption which is intrinsically isotropic in the event of a fall container at all possible angles, while being homogeneous, the lightest possible and simple to carry out.
  • the invention is a shock absorbing device secured to a container typically metallic for transporting or storing radioactive materials, characterized in that it comprises at least one cover covering at least in part of said container and forming a closed enclosure filled with a stack elementary parts having at least three concurrent axes of symmetry, the rotational symmetry is at least of order 3, that is to say that from a point it is necessary rotate no more than 120 ° to obtain an identical point.
  • the point of intersection of these axes preferably constitutes a center of symmetry of the part which is thus a part with centered symmetry.
  • these elementary pieces include regular polyhedra like tetrahedron with equilateral faces, the cube and all regular polyhedra having a greater number of equal faces, but also the sphere.
  • parts can be of various materials provided they have a capacity of sufficient deformation, for example ceramic, resin, reinforced or not.
  • metal parts preferably steel, aluminum, copper or their alloys, which have a good capacity to deform by absorbing a high energy without breaking during violent shocks, as is the case in a fall from a container.
  • the elementary parts are resin we can use massive parts, whereas in the case of elementary metal parts, it is particularly advantageous that they are hollowed out, respecting the conditions of symmetry above, so that they can deform better.
  • a cover is attached to each end of the container and therefore covers the ends of the shell, the bottom and the cover; it also overlaps the ends of the side wall of the shell.
  • the cover may cover the end of the container in whole or only in part; in the latter case it typically has the shape of a crown of L-shaped cross section covering the end angle of the container and leaving partly visible the center of the lid or of the bottom. It is possible to install intermediate covers filled with elementary parts according to the invention, encircling the shell between its ends.
  • the covers are generally metallic and made of sheet steel having a thickness sufficient not to be deformed by the load of the spheres under the usual conditions of handling and positioning of the cover and however sufficiently thin to be able to deform without breaking in the event of a fall.
  • the thickness of the sheet is typically between 2 and 8 mm depending on the mass of the container to be absorbed. They can be made of other materials, for example plastic.
  • the enclosure formed by the cover also has a height (or thickness) included generally between 10 and 100 cm; it is all the more important as the desired depreciation is high (for example for the most heavy) or that the elementary parts are more easily deformable.
  • symmetrical elementary parts make it easy to achieve regular, compact and homogeneous stacking in the entire enclosure without the need to take any special precautions; in particular the spheres are set up in a random way then are ordered automatically; stacking presents no risk of segregation. So the use of symmetrical elementary parts, such as spheres with symmetry centered, therefore isotropic and leading to an isotropic stacking, provides a isotropic damping by construction, whatever the angle of fall.
  • the elementary parts advantageously have an average diameter of between 20 and 80 mm. When they are too small, their manufacture and in particular their recess leading to thin parts can cause problems, and when they are too large the distribution of the homogeneity of the crushing forces can be affected. It is advantageous that the ratio between the height of the enclosure of the cover and the diameter of the elementary parts is between 2 and 20%.
  • the elementary parts are hollowed out, in particular the metallic spheres, they are preferably hollow parts with constant wall thickness; But they can also be obtained from solid parts in which there are drilled several identical holes of constant diameter, which can pass through them part by part, the distribution of which always respects the conditions of symmetry mentioned above.
  • the vacuum rate (ratio between the vacuum volume and the volume of the part) is adapted to the resistance to crushing that one wants to obtain. It is generally between 30 and 90% and preferably between 40 and 80%.
  • the ratio between the wall thickness and the average diameter, based on the largest dimension or the circumscribed circle, is typically between 0.03 and 0.3, which is complies with the above vacuum rate ranges.
  • the elementary parts according to the invention are deformable during impacts and it is remarkable to note that, unlike the use of tubular parts, they have, due to their specific symmetry characteristics, the property to deform in an identical or very similar manner whatever the direction of the force applied and that thus they provide the shock-absorbing device according to the invention, an isotropic and effective shock absorption whatever the angle of fall.
  • the device according to the invention can be adapted to all types of vacuum containers while retaining the essential property of isotropic behavior.
  • the elementary parts are all identical; however we can use parts of different diameters or vacuum rates in the same hood, for example bunk beds, to obtain characteristics progressive amortization.
  • a binder for example cement, glue, resin
  • the device according to the invention can easily be used for all container types ranging from heavier to lighter; just adjust the size and the vacuum rate of elementary metal parts to give them the crushing characteristics necessary for cushioning the container considered.
  • This cover is divided into compartments by walls (4a), each of the compartments containing a piece of wood whose fibers are oriented judiciously. It can be seen that the damping at a determined location depends both on the direction of the wood fibers and on the direction of the impact with respect to said fibers. Similar observations would be made by replacing the wood with a stack of arranged tubes whose orientation would be that of the fibers.
  • FIG. 2 which illustrates the invention
  • the cover (4) is filled with hollow spheres (6) all identical (only a few are shown) and that it covers the entire end of the container.
  • the cover has internal stiffeners (8). It might not cover it entirely and thus leave part of the cover (2) visible, it would then form a crown of straight section in the shape of an L.
  • the shell is equipped with an intermediate cover (7) surrounding it, according to the invention. It is filled with hollow spheres (6a) different from that of the end cover, because the crushing stresses sought in this area are different.
  • Figure 3 which illustrates elementary parts hollowed out according to the invention we see first of all in Figure 3a spheres, in profile and exploded, in which have were drilled holes (10) so as not to destroy the centered symmetry of the room. It is thus noted that there is a hole (10) opening on the surface at each of the ends of a system of 3 perpendicular axes of symmetry and that each holes centered on one of the axes of symmetry cross the sphere right through passing through its center. The sphere with its holes retains a symmetry of order 4.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Buffer Packaging (AREA)
  • Vibration Dampers (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
EP99402871A 1998-11-23 1999-11-19 Stossdämpfungsvorrichtung für einen Behälter zum Einschluss von radioaktiven Stoffen Withdrawn EP1005049A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9814868 1998-11-23
FR9814868A FR2786309B1 (fr) 1998-11-23 1998-11-23 Dispositif amortisseur de chocs pour conteneurs de matieres radioactives

Publications (1)

Publication Number Publication Date
EP1005049A1 true EP1005049A1 (de) 2000-05-31

Family

ID=9533193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99402871A Withdrawn EP1005049A1 (de) 1998-11-23 1999-11-19 Stossdämpfungsvorrichtung für einen Behälter zum Einschluss von radioaktiven Stoffen

Country Status (6)

Country Link
US (1) US6234311B1 (de)
EP (1) EP1005049A1 (de)
JP (1) JP2000162386A (de)
KR (1) KR20000035613A (de)
FR (1) FR2786309B1 (de)
TW (1) TW444208B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7107728B2 (en) 2000-05-23 2006-09-19 British Nuclear Fuels Plc Apparatus for the storage of hazardous materials

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4111037B2 (ja) * 2003-04-04 2008-07-02 株式会社日立製作所 キャスク用緩衝体
JP4250474B2 (ja) * 2003-07-31 2009-04-08 株式会社東芝 キャスク
US8731129B2 (en) * 2004-08-10 2014-05-20 Mitsubishi Heavy Industries, Ltd. Cask buffer body
JP2011247701A (ja) * 2010-05-25 2011-12-08 Mitsubishi Heavy Ind Ltd 放射性物質格納容器
JP4681681B1 (ja) * 2010-07-02 2011-05-11 三菱重工業株式会社 キャスク用緩衝体
JP2014048190A (ja) * 2012-08-31 2014-03-17 Mitsubishi Heavy Ind Ltd 緩衝装置及び緩衝装置の製造方法
FR3020173B1 (fr) * 2014-04-22 2019-06-21 Tn International Emballage pour le transport et/ou l'entreposage de matieres radioactives, comprenant un amortisseur d'angle a efficacite renforcee
JP6722553B2 (ja) * 2016-09-07 2020-07-15 日立造船株式会社 緩衝構造体
FR3080705B1 (fr) * 2018-04-27 2020-10-30 Tn Int Emballage de transport et/ou d'entreposage de matieres radioactives permettant une fabrication facilitee ainsi qu'une amelioration de la conduction thermique
US11721447B2 (en) * 2019-12-27 2023-08-08 Holtec International Impact amelioration system for nuclear fuel storage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1411473A (fr) * 1964-10-09 1965-09-17 Lemer & Cie Conteneur de transport pour produits radioactifs résistant aux chocs et au feu
EP0035064A2 (de) * 1980-02-21 1981-09-09 Nukem GmbH Störfallschutz für die Lagerung selbsterhitzender radioaktiver Stoffe
SU1295076A1 (ru) * 1985-02-13 1987-03-07 Busarov Yurij P Виброудароизол тор
DE3929491A1 (de) * 1988-09-06 1990-03-15 Exploweld Ab Verfahren zur konstruktion von werkzeugen fuer das arbeiten mit stosswellen erzeugenden energiequellen
JPH0442097A (ja) * 1990-06-07 1992-02-12 Kimura Chem Plants Co Ltd 緩衝構造体
DE4025257A1 (de) * 1990-08-09 1992-02-13 Bio Pack Verpackungs Gmbh Co Stossdaempfendes huellmaterial zur verwendung in verpackungsbehaelter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3304219A (en) * 1962-05-02 1967-02-14 Little Inc A Energy absorbing materials
US3667593A (en) * 1970-03-30 1972-06-06 John M Pendleton Flowable dunnage apparatus and method of packaging with flowable and compliable inflated dunnage material
US3999653A (en) * 1975-03-11 1976-12-28 The Dow Chemical Company Packaging for hazardous liquids
DE3028424C2 (de) * 1980-07-26 1984-05-30 Transnuklear Gmbh, 6450 Hanau Stoßdämpfer
DE3503057A1 (de) * 1985-01-30 1986-07-31 Hoechst Ag, 6230 Frankfurt Aufschaeumbares kunststoffgranulat und daraus hergestelltes packmaterial
US4972087A (en) * 1988-08-05 1990-11-20 Transnuclear, Inc. Shipping container for low level radioactive or toxic materials
US5312665A (en) * 1992-08-20 1994-05-17 Michelsen Packaging Company Biodegradable loose-fill packing material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1411473A (fr) * 1964-10-09 1965-09-17 Lemer & Cie Conteneur de transport pour produits radioactifs résistant aux chocs et au feu
EP0035064A2 (de) * 1980-02-21 1981-09-09 Nukem GmbH Störfallschutz für die Lagerung selbsterhitzender radioaktiver Stoffe
SU1295076A1 (ru) * 1985-02-13 1987-03-07 Busarov Yurij P Виброудароизол тор
DE3929491A1 (de) * 1988-09-06 1990-03-15 Exploweld Ab Verfahren zur konstruktion von werkzeugen fuer das arbeiten mit stosswellen erzeugenden energiequellen
JPH0442097A (ja) * 1990-06-07 1992-02-12 Kimura Chem Plants Co Ltd 緩衝構造体
DE4025257A1 (de) * 1990-08-09 1992-02-13 Bio Pack Verpackungs Gmbh Co Stossdaempfendes huellmaterial zur verwendung in verpackungsbehaelter

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section PQ Week 8740, Derwent World Patents Index; Class Q63, AN 87-282996, XP002111577 *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 218 (P - 1357) 21 May 1992 (1992-05-21) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7107728B2 (en) 2000-05-23 2006-09-19 British Nuclear Fuels Plc Apparatus for the storage of hazardous materials

Also Published As

Publication number Publication date
FR2786309A1 (fr) 2000-05-26
JP2000162386A (ja) 2000-06-16
KR20000035613A (ko) 2000-06-26
TW444208B (en) 2001-07-01
US6234311B1 (en) 2001-05-22
FR2786309B1 (fr) 2001-01-26

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