EP0049437B1 - Container for transport and/or storage of radioactive substances using a shock absorber - Google Patents

Container for transport and/or storage of radioactive substances using a shock absorber Download PDF

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Publication number
EP0049437B1
EP0049437B1 EP81107654A EP81107654A EP0049437B1 EP 0049437 B1 EP0049437 B1 EP 0049437B1 EP 81107654 A EP81107654 A EP 81107654A EP 81107654 A EP81107654 A EP 81107654A EP 0049437 B1 EP0049437 B1 EP 0049437B1
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EP
European Patent Office
Prior art keywords
shock absorber
container
saucer
spring
sheet
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.)
Expired
Application number
EP81107654A
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German (de)
French (fr)
Other versions
EP0049437A1 (en
Inventor
Werner Dipl.-Ing. Botzem
Elmar Dr. Dipl.-Ing. Schlich
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.)
Transnuklear GmbH
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Transnuklear GmbH
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Publication date
Application filed by Transnuklear GmbH filed Critical Transnuklear GmbH
Publication of EP0049437A1 publication Critical patent/EP0049437A1/en
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Publication of EP0049437B1 publication Critical patent/EP0049437B1/en
Expired 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

Definitions

  • the invention relates to a container for the transport and / or storage of radioactive material, which has a shock absorber which consists of a plurality of radially and / or axially arranged chambers which are filled with damping material.
  • Transport and / or storage containers must safely contain the radioactivity of the goods brought in, even after an accident, for example after a container crash.
  • the containers are designed accordingly and, at least during the handling and transport phase, are additionally equipped with shock absorbers on the container end faces.
  • the shock absorbers should absorb as much deformation energy as possible, with the aim of a gentle shock absorber characteristic so that the load on the container and its radioactive inventory remains low.
  • Shock absorbers for transport containers are known (DE-C-26 50 417, DE-B-28 30 305). They usually have a multilayer structure. The layers are often separated by vertical sheets and some have different deformation characteristics. But there are also shock absorbers with a multilayer structure in the radial direction.
  • shock absorbers In spite of sometimes considerable structural expenditure, they cannot avoid the fact that the lid area of the container is often still heavily loaded in the event of an accident.
  • the relatively sensitive sealing elements between the container lid and the container body are also extremely at risk.
  • a shock absorber which consists of a plurality of radially and axially arranged chambers which are filled with damping material.
  • the shock absorber contains plates deformed like a plate spring with a curvature directed away from the container and the inside of the shock absorber opposite the cover consists of a plate deformed like a plate spring.
  • a hat-shaped shock absorber (1) is placed on the end face (9) of a transport and / or storage container (11) for irradiated fuel elements, provided with cooling fins (12).
  • the shock absorber (1) consists of radially and axially arranged chambers (14) which are filled with damping material.
  • the shock absorber (1) contains round or square sheets (2) deformed like a plate spring, the edge region of which rests on the walls (13) of the chambers (14). When a force is applied, the damping material is first compressed and the shock absorber (1) or shock absorber segments move relative to the container (11). If a pressure builds up on the deformed sheet (2) as a result of the force, the curvature of the deformed sheet (2) is shortened and the forces are introduced into the rigidly configured lateral chamber systems.
  • the plate spring-like plate (2) which is comparable to a so-called “crack frog”, is strong.
  • the thickness of the material is, for example, 30 to 60 mm.
  • the arch height of the deformed sheet (2) which is for example 100 to 200 mm, is thus not reduced to zero during the pressure build-up.
  • the sheets are generally made of steel.
  • the plate (6) of the shock absorber (1) which is deformed in the manner of a plate spring does not rest in the edge region (7) of the container lid (4). Since the plate spring-like deformed plate (6) has contact surfaces (8) only on the front side (9) of the container body (15) and does not rest on the cover (4), no forces act on the cover and thus on the sealing system (3) .
  • the bearing surfaces (8) of the plate (6) deformed in the manner of a plate spring on the end face (9) of the container body (15) are designed as plain bearings. It is advantageous if the bearing surfaces (8) are lubricated. Suitable lubricants are, for example, molybdenum disulfide, graphite or plastic. In the case of a multilayer structure of spring-like deformed sheets (2) in the shock absorber (1), the sheets (2) can be supported on one another via layers of damping material or via spring assemblies.
  • the formation of the outer end face (5) of the shock absorber (1) as a plate (10) deformed in the manner of a disk has also proven to be particularly favorable, as has the arrangement of further deformed plates (16), the axis of which is not arranged parallel to the axis of the shock absorber. In the event of an oblique force, these deformed sheets (16) become particularly effective and prevent the lid (4) and the sealing system (3) from being loaded against the container body (15).

Description

Gegenstand der Erfindung ist ein Behälter zum Transport und/oder zur Lagerung von radioaktivem Material, der einen Stossdämpfer aufweist, welcher aus mehreren radial und/oder axial angeordneten Kammern besteht, die mit Dämpfungsmaterial gefüllt sind.The invention relates to a container for the transport and / or storage of radioactive material, which has a shock absorber which consists of a plurality of radially and / or axially arranged chambers which are filled with damping material.

Transport- und/oder Lagerbehälter müssen die Radioaktivität des eingebrachten Gutes sicher einschliessen, auch nach einer Unfallbeanspruchung, beispielsweise nach einem Behälterabsturz. Dementsprechend werden die Behälter ausgelegt und an den Behälterstirnseiten zumindest während der Handhabungs- und Transportphase zusätzlich mit Stossdämpfern ausgestattet. Bei einem Absturz bzw. Aufprall sollen die Stossdämpfer möglichst viel Verformungsenergie aufnehmen, wobei eine schonende Stossdämpfercharakteristik angestrebt wird, damit die Belastung für den Behälter und sein radioaktives Inventar gering bleibt.Transport and / or storage containers must safely contain the radioactivity of the goods brought in, even after an accident, for example after a container crash. The containers are designed accordingly and, at least during the handling and transport phase, are additionally equipped with shock absorbers on the container end faces. In the event of a crash or impact, the shock absorbers should absorb as much deformation energy as possible, with the aim of a gentle shock absorber characteristic so that the load on the container and its radioactive inventory remains low.

Stossdämpfer für Transportbehälter sind bekannt (DE-C-26 50 417, DE-B-28 30 305). Sie haben meist einen mehrschichtigen Aufbau. Die Schichten sind oft durch senkrecht stehende Bleche getrennt und haben zum Teil unterschiedliche Verformungscharakteristika. Es gibt aber auch Stossdämpfer mit mehrschichtigem Aufbau in radialer Richtung.Shock absorbers for transport containers are known (DE-C-26 50 417, DE-B-28 30 305). They usually have a multilayer structure. The layers are often separated by vertical sheets and some have different deformation characteristics. But there are also shock absorbers with a multilayer structure in the radial direction.

Der Nachteil bekannter Stossdämpfer besteht darin, dass sie trotz teilweise erheblicher konstruktiver Aufwendungen nicht vermeiden können, dass der Deckelbereich des Behälters bei Unfallsituationen oft doch noch stark belastet ist. Damit sind aber auch die relativ empfindlichen Dichtungselemente zwischen dem Behälterdeckel und dem Behältergrundkörper ausserordentlich gefährdet.The disadvantage of known shock absorbers is that, in spite of sometimes considerable structural expenditure, they cannot avoid the fact that the lid area of the container is often still heavily loaded in the event of an accident. However, the relatively sensitive sealing elements between the container lid and the container body are also extremely at risk.

Es war daher Aufgabe der vorliegenden Erfindung, einen Behälter zum Transport und/oder zur Lagerung von radioaktivem Material zu schaffen, der einen Stossdämpfer aufweist, welcher aus mehreren radial und axial angeordneten Kammern besteht, die mit Dämpfungsmaterial gefüllt sind. Mit diesem Stossdämpfer sollte die Verformungsenergie in einer Unfallsituation gut abgeleitet und der Deckel- und Dichtungselementebereich des Behälters nicht oder nur geringfügig belastet werden.It was therefore an object of the present invention to provide a container for the transport and / or storage of radioactive material which has a shock absorber which consists of a plurality of radially and axially arranged chambers which are filled with damping material. With this shock absorber, the deformation energy should be dissipated well in an accident situation and the lid and sealing element area of the container should not be or only slightly loaded.

Die Aufgabe wurde erfindungsgemäss dadurch gelöst, dass der Stossdämpfer tellerfederartig verformte Bleche mit einer vom Behälter weggerichteten Wölbung enthält und die dem Deckel gegenüberliegende Innenseite des Stossdämpfers aus einem tellerfederartig verformten Blech besteht.The object was achieved according to the invention in that the shock absorber contains plates deformed like a plate spring with a curvature directed away from the container and the inside of the shock absorber opposite the cover consists of a plate deformed like a plate spring.

Anhand der schematischen Abbildungen I bis 111 wird der erfindungsgemässe Behälter beispielhaft erläutert.The container according to the invention is explained by way of example with the aid of schematic illustrations I to 111.

Auf die Stirnseite (9) eines Transport- und/oder Lagerbehälters (11) für bestrahlte Brennelemente, versehen mit Kühlrippen (12), ist ein hutförmiger Stossdämpfer (1) aufgesetzt. Der Stossdämpfer (1) besteht aus radial und axial angeordneten Kammern (14), die mit Dämpfungsmaterial gefüllt sind. Der Stossdämpfer (1) enthält tellerfederartig verformte runde oder eckige Bleche (2), deren Randbereich auf den Wänden (13) der Kammern (14) aufliegen. Bei einer Krafteinwirkung erfolgt zunächst eine Verdichtung des Dämpfungsmaterials und eine Relativbewegung des Stossdämpfers (1) oder von Stossdämpfersegmenten gegenüber dem Behälter (11). Baut sich nun infolge der Krafteinwirkung ein Druck am verformten Blech (2) auf, wird die Wölbungshöhe des verformten Bleches (2) verkürzt und die Kräfte in die steif ausgebildeten seitlichen Kammernsysteme eingeleitet. Das mit einem sogenannten « Knackfrosch » vergleichbare tellerfederartig verformte Blech (2) ist kräftig ausgebildet. Die Dicke des Materials beträgt beispielsweise 30 bis 60 mm. Damit wird die Wölbungshöhe des verformten Bleches (2), die beispielsweise 100 bis 200 mm beträgt, während des Druckaufbaues nicht gegen Null erniedrigt. Die Bleche bestehen im allgemeinen aus Stahl.A hat-shaped shock absorber (1) is placed on the end face (9) of a transport and / or storage container (11) for irradiated fuel elements, provided with cooling fins (12). The shock absorber (1) consists of radially and axially arranged chambers (14) which are filled with damping material. The shock absorber (1) contains round or square sheets (2) deformed like a plate spring, the edge region of which rests on the walls (13) of the chambers (14). When a force is applied, the damping material is first compressed and the shock absorber (1) or shock absorber segments move relative to the container (11). If a pressure builds up on the deformed sheet (2) as a result of the force, the curvature of the deformed sheet (2) is shortened and the forces are introduced into the rigidly configured lateral chamber systems. The plate spring-like plate (2), which is comparable to a so-called “crack frog”, is strong. The thickness of the material is, for example, 30 to 60 mm. The arch height of the deformed sheet (2), which is for example 100 to 200 mm, is thus not reduced to zero during the pressure build-up. The sheets are generally made of steel.

Besonders günstig ist es, wenn das tellerfederartig nach oben verformte Blech (6) des Stossdämpfers (1) nicht im Randbereich (7) des Behälterdeckels (4) aufliegt. Da das tellerfederartig verformte Blech (6) nur an der Stirnseite (9) des Behälterkörpers (15) Auflageflächen (8) besitzt und nicht auf dem Deckel (4) aufliegt, wirken keine Kräfte auf das Deckel- und somit auf das Dichtungssystem (3).It is particularly expedient if the plate (6) of the shock absorber (1) which is deformed in the manner of a plate spring does not rest in the edge region (7) of the container lid (4). Since the plate spring-like deformed plate (6) has contact surfaces (8) only on the front side (9) of the container body (15) and does not rest on the cover (4), no forces act on the cover and thus on the sealing system (3) .

Besonders günstig ist es, wenn die Auflageflächen (8) des tellerfederartig verformten Bleches (6) an der Stirnseite (9) des Behälterkörpers (15) als Gleitlager ausgebildet sind. Dabei ist es vorteilhaft, wenn die Auflageflächen (8) geschmiert sind. Als Schmiermittel eigenen sich beispielsweise Molybdändisulfid, Graphit oder Kunststoff. Im Falle eines mehrschichtigen Aufbaues von federartig verformten Blechen (2) im Stossdämpfer (1) kann die Abstützung der Bleche (2) aufeinander über Schichten aus Dämpfungsmaterial oder über Federpakete erfolgen.It is particularly favorable if the bearing surfaces (8) of the plate (6) deformed in the manner of a plate spring on the end face (9) of the container body (15) are designed as plain bearings. It is advantageous if the bearing surfaces (8) are lubricated. Suitable lubricants are, for example, molybdenum disulfide, graphite or plastic. In the case of a multilayer structure of spring-like deformed sheets (2) in the shock absorber (1), the sheets (2) can be supported on one another via layers of damping material or via spring assemblies.

Die Ausbildung der äusseren Stirnseite (5) des Stossdämpfers (1) als tellerferdrartig verformtes Blech (10) hat sich ebenfalls als besonders günstig herausgestellt, ebenso die Anordnung weiterer verformter Bleche (16), deren Achse nicht parallel zur Stossdämpferachse angeordnet ist. Bei einer schrägen Krafteinwirkung werden diese verformten Bleche (16) besonders wirksam und verhindern eine Belastung des Deckels (4) und des Dichtungssystems (3) Deckel (4) gegen Behälterkörper (15).The formation of the outer end face (5) of the shock absorber (1) as a plate (10) deformed in the manner of a disk has also proven to be particularly favorable, as has the arrangement of further deformed plates (16), the axis of which is not arranged parallel to the axis of the shock absorber. In the event of an oblique force, these deformed sheets (16) become particularly effective and prevent the lid (4) and the sealing system (3) from being loaded against the container body (15).

Claims (6)

1. A container for transporting and/or storing radioactive material, which container has a shock absorber consisting of several chambers which are arranged in a radial and/or axial manner and are filled with damping material, characterised in that the shock absorber (1) contains sheets (2), in the shape of a saucer spring, which has a bulge directed away from the container and the inside of the shock absorber (1) which is opposite the lid of the container (4) consists of a saucer-like sheet (6).
2. A container according to claim 1, characterised in that the saucer-spring-like sheet (6) of the shock absorber does not lie in the peripheral region (7) of the lid of the container (4).
3. A container according to claim 1 or 2, characterised in that the contact surfaces (8) of the saucer-spring-like sheet (6) of the shock absorber (1) is designed as a slide bearing on the face (9) of the container body (15).
4. A container according to one of claims 1 to 3, characterised in that the contact surfaces (8) are lubricated.
5. A container according to one of claims 1 to 4, characterised in that the external face of the shock absorber (1) also consists of a saucer-spring-like sheet (10).
6. A container according to one of claims 1 to 5, characterised in that the axis of other shaped sheets (16) of the shock absorber (1) is not arranged parallel to the axis of the shock absorber.
EP81107654A 1980-10-02 1981-09-26 Container for transport and/or storage of radioactive substances using a shock absorber Expired EP0049437B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3037328A DE3037328C2 (en) 1980-10-02 1980-10-02 Shock absorbers for containers for the transport and / or storage of radioactive material
DE3037328 1980-10-02

Publications (2)

Publication Number Publication Date
EP0049437A1 EP0049437A1 (en) 1982-04-14
EP0049437B1 true EP0049437B1 (en) 1984-07-04

Family

ID=6113477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107654A Expired EP0049437B1 (en) 1980-10-02 1981-09-26 Container for transport and/or storage of radioactive substances using a shock absorber

Country Status (4)

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US (1) US4627956A (en)
EP (1) EP0049437B1 (en)
DE (2) DE3037328C2 (en)
ES (1) ES505933A0 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1152714B (en) * 1982-10-11 1987-01-07 Aginucleare Spa IMPACT ABSORBER FOR NUCLEAR FUEL CONTAINERS AND / OR DANGEROUS CHEMICAL SUBSTANCES
DE3325119A1 (en) * 1983-07-12 1985-01-24 Deutsche Gesellschaft für Wiederaufarbeitung von Kernbrennstoffen mbH, 3000 Hannover CONTAINER FOR STORING RADIOACTIVE SUBSTANCES
EP0192856B1 (en) * 1985-02-26 1989-08-30 Acec Energie S.A. Damper for a container of nuclear assemblies
CA1287696C (en) * 1986-02-07 1991-08-13 Westinghouse Electric Corporation Impact protection arrangement for type a transportation of concrete modules containing radioactive waste
DE3610862A1 (en) * 1986-04-01 1987-10-08 Kernforschungsz Karlsruhe LENGTH CYLINDRICAL CONTAINER FOR THE FINAL STORAGE OF ONE OR MORE CHILLERS FILLED WITH HIGH RADIOACTIVE WASTE
FR2610907B1 (en) * 1987-02-16 1989-07-13 Commissariat Energie Atomique AIR TRANSPORT CONTAINER FOR HAZARDOUS MATERIALS
US4803042A (en) * 1987-11-23 1989-02-07 Westinghouse Electric Corp. Nuclear reactor core component shipping container
US6280127B1 (en) * 2000-09-11 2001-08-28 Gnb Gesellschaft Fur Nuklearbehalter Mbh Shock absorber attachment for containers
DE502004009351D1 (en) * 2004-03-06 2009-05-28 Nuklear Service Gmbh Gns Transport and / or storage container with at least one radioactive element
US8196747B2 (en) * 2005-12-06 2012-06-12 International Business Machines Corporation End cap packaging material, packaging and method for protecting products against damage
DE102013221230B4 (en) 2013-10-18 2017-10-05 Werner & Pfleiderer Lebensmitteltechnik Gmbh Rotary valve assembly for a dough portioning device

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Also Published As

Publication number Publication date
EP0049437A1 (en) 1982-04-14
DE3037328A1 (en) 1982-04-22
ES8401901A1 (en) 1984-01-01
DE3164585D1 (en) 1984-08-09
DE3037328C2 (en) 1982-12-23
US4627956A (en) 1986-12-09
ES505933A0 (en) 1984-01-01

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