EP0223997A1 - Container for transporting and storing biologically hazardous materials - Google Patents

Container for transporting and storing biologically hazardous materials Download PDF

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Publication number
EP0223997A1
EP0223997A1 EP86114098A EP86114098A EP0223997A1 EP 0223997 A1 EP0223997 A1 EP 0223997A1 EP 86114098 A EP86114098 A EP 86114098A EP 86114098 A EP86114098 A EP 86114098A EP 0223997 A1 EP0223997 A1 EP 0223997A1
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EP
European Patent Office
Prior art keywords
base body
cover
container
lid
sealing
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Granted
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EP86114098A
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German (de)
French (fr)
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EP0223997B1 (en
Inventor
Lothar Kessner
Roland Kinkl
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Nukem GmbH
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Transnuklear GmbH
Nukem GmbH
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Application filed by Transnuklear GmbH, Nukem GmbH filed Critical Transnuklear GmbH
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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
    • G21F5/12—Closures for containers; Sealing arrangements

Definitions

  • the invention relates to a container for the transport and storage of bio-harmful substances, in particular radioactive substances, consisting of a base body and a lid fastened with screws thereon via two concentric, spaced-apart sealing rings, which is provided with a line, the contact surfaces of Base body and cover are plane-parallel in the area of the two sealing rings.
  • Containers for the transport and storage of radioactive materials usually have a base body and a sealed lid and are also provided with connecting elements, via which it is possible to set certain conditions in the interior of the container after loading, in particular the type of Filling gas and its pressure.
  • the loaded containers are filled with helium and the pressure is set to 0.5 bar absolute. This is done to avoid corrosion, to create a defined pressure drop for radiation protection reasons and also to be able to offer helium for a leak test of the cover seal.
  • These connection elements may represent weak points in the container and are usually also very expensive to manufacture.
  • the figure shows schematically an exemplary embodiment of the container in longitudinal section.
  • the container consists of a base body (1) and a lid (2). They enclose the interior of the container (6) in which the radioactive material is located.
  • the cover (2) is fastened to the base body (1) using screws (7).
  • the line (5) opens into the space between the two sealing rings (3, 4).
  • a connection to various systems, such as a vacuum pump, inert gas supply or leak test device, can be established via this line (5).
  • the two concentric sealing rings (3, 4) are inserted and the cover (2) put on. It is also possible to attach the sealing rings (3, 4) to the cover (2) beforehand and to place them together with the cover on the base body (1).
  • the interior of the container (6) is evacuated, for example with a vacuum pump, via the line (5).
  • the flooding is then carried out with the desired gas, either pure helium or another inert gas, to which helium has been added to carry out a leak test.
  • the inner sealing ring (4) is also pressed in by finally tightening the screws (7) until the base body (1) and cover (2) touch.
  • Metal or plastic can be used as the material of the sealing rings, a combination of the two materials is also possible. In the case of containers for long-term interim storage, metal seals are preferably used.
  • a softer material is preferably chosen for the external sealing ring (3), i.e. a seal with a smaller spring constant than for the internal sealing ring (4).
  • a gas sample can be drawn from the container interior (6) and a controlled pressure compensation between the container interior (6) and the environment can be established.
  • the line (5) is connected to a gas collection or analysis device and a ventilation system. Then you lift the cover (2) so far that the inner sealing ring (4) is no longer in engagement. This creates a connection to the interior of the container (6).

Abstract

1. Container for the transportation and storage of biologically harmful materials, in particular radioactive materials, comprising a base body and a lid which is secured on the latter by means of bolts via two concentric gasket rings attached at a mutual interval and is provided with a conduit, the bearing surfaces of base body and lid being plane-parallel in the region of the two gasket rings, characterized in that the conduit (5) through the lid (2) ends in the annular zone between the two gasket rings (3, 4), in that the inner gasket ring (4) has a smaller cross-section than the outer gasket ring (3), and in that the difference in cross-section between the two gasket rings (3, 4) is selected as a function of the spring characteristics of the sealing material, such that when the lid (2) is placed on the base body (1) only the outer gasket ring (3) is initially compressed in sealing fashion and the inner gasket ring (4) is not yet touched by the lid (2) or the base body (1).

Description

Die Erfindung betrifft einen Behälter zum Transport und zur Lagerung bioschädlicher Stoffe, insbesondere von radioaktiven Stoffen, bestehend aus einem Grundkörper und einem über zwei konzentrische, im Abstand voneinander angebrachte Dichtringe mit Schrauben darauf befestigten Deckel, der mit einer Leitung versehen ist, wobei die Auflageflächen von Grundkörper und Deckel im Bereich der beiden Dichtringe planparallel sind.The invention relates to a container for the transport and storage of bio-harmful substances, in particular radioactive substances, consisting of a base body and a lid fastened with screws thereon via two concentric, spaced-apart sealing rings, which is provided with a line, the contact surfaces of Base body and cover are plane-parallel in the area of the two sealing rings.

Behälter für den Transport und die Lagerung radioaktiver Stoffe weisen in der Regel einen Grundkörper und einen abgedichteten Deckel auf und sind darüber hinaus mit Anschlußorganen versehen, über die es möglich ist, nach der Beladung bestimmte Bedingungen im Innenraum des Behälters gezielt einzustellen, insbesondere die Art des Füllgases und dessen Druck. Beispielsweise füllt man die beladenen Behälter mit Helium und stellt den Druck auf 0,5 bar absolut ein. Dies geschieht, um Korrosion zu vermeiden, um aus Strahlenschutzgründen ein definiertes Druckgefälle zu erzeugen, und auch um Helium für einen Lecktest der Deckeldichtung anbieten zu können. Diese Anschlußorgane stellen gegebenenfalls Schwachstellen im Behälter dar und sind meistens auch bei der Herstellung sehr kostenaufwendig.Containers for the transport and storage of radioactive materials usually have a base body and a sealed lid and are also provided with connecting elements, via which it is possible to set certain conditions in the interior of the container after loading, in particular the type of Filling gas and its pressure. For example, the loaded containers are filled with helium and the pressure is set to 0.5 bar absolute. This is done to avoid corrosion, to create a defined pressure drop for radiation protection reasons and also to be able to offer helium for a leak test of the cover seal. These connection elements may represent weak points in the container and are usually also very expensive to manufacture.

Aus dem DE-GM 7930459 ist ein gattungsgemäßer Transport-und Lagerbehälter für radioaktive Stoffe bekannt, auf dessen Grundkörper ein Deckel über Dichtringe mittels Schrauben befestigt ist. Im Deckel befinden sich außerdem Bedienungsanschlüsse und Leitungen, die zum Teil in die Behälterwand eingebettet sind oder unterhalb des Deckels in den Behälterinnenraum münden. Zur Abdichtung dieser Leitungen gegen den Behälterinnenraum sind Absperrorgane im Deckel erforderlich, wie zum Beispiel Ventile, die - auch wegen ihres Raumbedarfs - die mechanische Stabilität des Deckels schwächen. Die in der Behälterwand eingebettete Leitung ist im Übergangsbereich Deckel/Behälterwand mit einer ringförmigen Dichtung um die zylindrische Bohrung abgedichtet.From DE-GM 7930459 a generic transport and storage container for radioactive substances is known, on the base of which a cover is attached by means of sealing rings Screws is attached. There are also operating connections and cables in the lid, some of which are embedded in the container wall or open into the interior of the container below the lid. To seal these lines against the interior of the container, shut-off devices in the lid are required, such as valves, which - also because of their space requirement - weaken the mechanical stability of the lid. The line embedded in the container wall is sealed in the transition area between cover and container wall with an annular seal around the cylindrical bore.

Aus der US-PS 4 197 467 ist es bekannt, den Raum zwischen zwei konzentrischen Ringdichtungen über eine in der Ringzone zwischen den beiden Ringdichtungen endende Leitung mit Druckluft zu beaufschlagen, um die Dichtheit der Abdichtung zu prüfen.From US-PS 4 197 467 it is known to apply compressed air to the space between two concentric ring seals via a line ending in the ring zone between the two ring seals in order to test the tightness of the seal.

Es war Aufgabe der vorliegenden Erfindung, einen Behälter zum Transport und zur Lagerung bioschädlicher Stoffe zu entwickeln, insbesondere von radioaktiven Stoffen, bestehend aus einem Grundkörper und einem über zwei konzentrische, im Abstand voneinander angebrachte Dichtringe mit Schrauben darauf befestigten Deckel, der mit einer Leitung versehen ist, wobei die Auflageflächen von Grundkörper und Deckel im Bereich der beiden Dichtringe planparallel sind, bei dem eine Gasbeaufschlagung des Behälterinnenraums möglich ist, ohne Schwächung der Behälterwandung und des Deckels und ohne Verwendung komplizierter und raumaufwendiger Absperrorgane.It was an object of the present invention to develop a container for the transport and storage of bio-harmful substances, in particular radioactive substances, consisting of a base body and a cover fastened with screws thereon via two concentric, spaced-apart sealing rings and provided with a line is, the contact surfaces of the base body and cover in the area of the two sealing rings are plane-parallel, in which gas can be applied to the interior of the container without weakening the container wall and the cover and without using complicated and space-consuming shut-off devices.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Leitung durch den Deckel in der Ringzone zwischen den beiden Dichtringen endet, daß der innenliegende Dichtring einen geringeren Querschnitt aufweist als der außenliegende Dichtring, und daß der Querschnittsunterschied der beiden Dichtringe in Abhängigkeit von der Federcharakteristik des Dichtungsmaterials so gewählt ist, daß beim Aufsetzen des Deckels auf den Grundkörper zuerst nur der außenliegende Dichtring abdichtend verpresst und der innenliegende Dichtring vom Deckel oder dem Grundkörper noch nicht berührt wird.This object is achieved in that the line through the cover ends in the ring zone between the two sealing rings, that the inner sealing ring has a smaller cross-section than the outer sealing ring, and that the cross-sectional difference of the two sealing rings depends on the spring characteristics of the sealing material is selected so that when the lid is placed on the base body, only the outer sealing ring is first pressed in a sealing manner and the inner sealing ring is not yet touched by the lid or the base body.

Durch diese Konstruktion wird erreicht, daß nur eine einfache Bohrung im Deckel vorhanden sein muß, die diesen kaum schwächt, und auf spezielle Absperrorgane für die Leitung verzichtet werden kann.This construction ensures that there is only a simple hole in the cover that hardly weakens it, and special shut-off devices for the line can be dispensed with.

Die Figur zeigt schematisch eine beispielhafte Ausführungsform des Behälters im Längsschnitt.The figure shows schematically an exemplary embodiment of the container in longitudinal section.

Der Behälter besteht aus einem Grundkörper (1) und einem Deckel (2). Sie umschließen den Behälterinnenraum (6), in dem sich der radioaktive Stoff befindet. Die Befestigung des Deckels (2) am Grundkörper (1) erfolgt mit Hilfe von Schrauben (7). Zur Abdichtung des Deckels (2) gegenüber dem Grundkörper (1) sind zwei konzentrische Dichtringe (3,4) vorhanden, wobei der innenliegende Dichtring (4) im Querschnitt kleiner ist als der außenliegende Dichtring (3). Im Bereich der beiden Dichtringe (3,4) sind die Auflageflächen von Grundkörper (1) und Deckel (2) planparallel ausgebildet.The container consists of a base body (1) and a lid (2). They enclose the interior of the container (6) in which the radioactive material is located. The cover (2) is fastened to the base body (1) using screws (7). There are two concentric sealing rings (3, 4) for sealing the cover (2) with respect to the base body (1), the internal sealing ring (4) being smaller in cross section than the external sealing ring (3). In the area of the two sealing rings (3, 4), the contact surfaces of the base body (1) and cover (2) are plane-parallel.

In den Raum zwischen den beiden Dichtringen (3,4) mündet die Leitung (5). Über diese Leitung (5) kann eine Verbindung zu verschiedenen Systemen, wie Vakuumpumpe, Inertgasversorgung oder Lecktestgerät hergestellt werden.The line (5) opens into the space between the two sealing rings (3, 4). A connection to various systems, such as a vacuum pump, inert gas supply or leak test device, can be established via this line (5).

Nach der Beladung des Behälters, beispielsweise in einer Abschirmzelle, werden die beiden konzentrischen Dichtringe (3,4) eingelegt und der Deckel(2) aufgesetzt. Es ist auch möglich, die Dichtringe (3,4) bereits vorher am Deckel (2) anzubringen und mit dem Deckel gemeinsam auf den Grundkörper (1) aufzusetzen.After loading the container, for example in a shielding cell, the two concentric sealing rings (3, 4) are inserted and the cover (2) put on. It is also possible to attach the sealing rings (3, 4) to the cover (2) beforehand and to place them together with the cover on the base body (1).

Beim Aufsetzen des Deckels (2) muß dafür gesorgt werden, daß der außenliegende Dichtring (3) bereits dichtet, während der innenliegende Dichtring (4) zunächst noch nicht beansprucht wird und einen Spalt für einen Gasdurchgang freiläßt. Hierzu gibt es je nach Gewicht des aufzusetzenden Deckels (2) und der Federcharakteristik des außenliegenden Dichtrings zwei Möglichkeiten. Bei einem leichten Deckel (2) werden nach Aufsetzen des Deckels die Deckelschraumen (7) nur so weit angezogen, bis ein vorbestimmter Abstand Deckel/Grundkörper eingestellt ist. Diesen Abstand kann man z.B. mit Lehren einstellen. Bei schweren Deckeln (2) muß man umgekehrt dafür sorgen, nicht durch das Eigengewicht beide Dichtringe (3,4) gleichzeitig zu verpressen. Entsprechend kann man in an sich bekannter Weise im Deckel (2) einige Abdrückschrauben vorsehen, die man bereits vor dem Aufsetzen des Deckels in diesen einschraubt.When the cover (2) is put on, it must be ensured that the outer sealing ring (3) already seals, while the inner sealing ring (4) is initially not yet stressed and leaves a gap for a gas passage. Depending on the weight of the cover (2) and the spring characteristics of the external sealing ring, there are two options. In the case of a light cover (2), after the cover has been put on, the cover spaces (7) are only tightened until a predetermined distance between cover and base body has been set. This distance can be e.g. with teachings. In the case of heavy lids (2), conversely, care must be taken not to press both sealing rings (3, 4) at the same time due to their own weight. Correspondingly, you can provide a number of forcing screws in the cover (2) in a manner known per se, which screws are screwed into the cover before it is put on.

Nachdem der außenliegende Dichtring (3) dichtend angepreßt ist, wird über die Leitung (5) der Behälterinnenraum (6) beispielsweise mit einer Vakuumpumpe evakuiert. Anschließend erfolgt das Fluten mit dem gewünschten Gas, entweder reines Helium oder auch ein anderes Inertgas, dem Helium zur Durchführung eines Lecktests beigemischt wurde. In einem nächsten Schritt wird nun auch der innenliegende Dichtring (4) verpreßt, indem die Schrauben (7) endgültig angezogen werden, bis Grundkörper (1) und Deckel (2) sich berühren.After the outer sealing ring (3) is pressed in a sealed manner, the interior of the container (6) is evacuated, for example with a vacuum pump, via the line (5). The flooding is then carried out with the desired gas, either pure helium or another inert gas, to which helium has been added to carry out a leak test. In a next step, the inner sealing ring (4) is also pressed in by finally tightening the screws (7) until the base body (1) and cover (2) touch.

Damit ist der Behälterinnenraum (6) gegenüber der Umgebung so abgedichtet, daß der Behälter mit Inhalt transport- und lagerfähig ist. Es verbleibt die Aufgabe, die Dichtheit des innenliegenden Dichtrings (4) zu überprüfen. Zu diesem Zweck wird über die Leitung (5) in bekannter Weise Gas abgepumpt und auf Helium aus dem Behälterinnenraum analysiert. Hierbei ist natürlich zu beachten, daß zunächst das während der Flutung des Behälters im Zwischenraum zwischen den Dichtringen (3,4) verbliebene Helium-kontaminierte Gas abgesaugt werden muß.So that the container interior (6) is sealed from the environment so that the container with its contents can be transported and stored. The task remains to check the tightness of the internal sealing ring (4). For this purpose, gas is pumped out via line (5) in a known manner and analyzed for helium from the interior of the container. Of course, it should be noted that the helium-contaminated gas remaining in the space between the sealing rings (3, 4) during the flooding of the container must first be extracted.

Als Material der Dichtringe kann Metall oder Kunststoff verwendet werden, auch eine Kombination der beiden Werkstoffe ist möglich. Im Falle von Behältern für längerfristige Zwischenlagerung verwendet man vorzugsweise Metalldichtungen.Metal or plastic can be used as the material of the sealing rings, a combination of the two materials is also possible. In the case of containers for long-term interim storage, metal seals are preferably used.

Um die erforderlichen Anpreßkräfte für die beiden Dichtringe (3,4) in Grenzen zu halten, wählt man vorzugsweise für den außenliegenden Dichtring (3) ein weicheres Material, d.h. eine Dichtung mit kleinerer Federkonstante als für den innenliegenden Dichtring (4).In order to keep the required contact forces for the two sealing rings (3, 4) within limits, a softer material is preferably chosen for the external sealing ring (3), i.e. a seal with a smaller spring constant than for the internal sealing ring (4).

Bei der Entladung des Behälters kann eine Gasprobe aus dem Behälterinnenraum (6) gezogen sowie ein kontrollierter Druckausgleich zwischen Behälterinnenraum (6) und Umgebung hergestellt werden.When the container is unloaded, a gas sample can be drawn from the container interior (6) and a controlled pressure compensation between the container interior (6) and the environment can be established.

Hierzu verbindet man die Leitung (5) mit einem Gasauffang- bzw. Analysengerät und einem Entlüftungssystem. Dann hebt man den Deckel (2) soweit an, daß der innenliegende Dichtring (4) nicht mehr im Eingriff ist. Damit ist eine Verbindung zum Behälterinnenraum (6) hergestellt.For this purpose, the line (5) is connected to a gas collection or analysis device and a ventilation system. Then you lift the cover (2) so far that the inner sealing ring (4) is no longer in engagement. This creates a connection to the interior of the container (6).

Claims (1)

Behälter zum Transport und zur Lagerung bioschädlicher Stoffe:, insbesondere von radioaktiven Stoffen, bestehend aus einem Grundkörper und einem über zwei konzentrische, im Abstand voneinander angebrachte Dichtringe mit Schrauben darauf befestigtem Deckel, der mit einer Leitung versehen ist, wobei die Auflageflächen von Grundkörper und Deckel im Bereich der beiden Dichtringe planparallel sind,
dadurch gekennzeichnet,
daß die Leitung (5) durch den Deckel (2) in der Ringzone zwischen den beiden Dichtringen (3, 4) endet, daß der innenliegende Dichtring (4) einen geringeren Querschnitt aufweist als der außenliegende Dichtring (3), und daß der Querschnittsunterschied der beiden Dichtringe (3,4) in Abhängigkeit von der Federcharakteristik des Dichtungsmaterials so gewählt ist, daß beim Aufsetzen des Deckels (2) auf den Grundkörper (1) zuerst nur
der außenliegende Dichtring (3) abdichtend verpresst und der innenliegende Dichtring (4) vom Deckel (2) oder dem Grundkörper (1) noch nicht berührt wird.Containers for the transport and storage of bio-harmful substances:, in particular radioactive substances, consisting of a base body and a cover attached to it by means of two concentric, spaced-apart sealing rings with screws, which is provided with a line, the contact surfaces of the base body and cover are plane-parallel in the area of the two sealing rings,
characterized,
that the line (5) through the cover (2) ends in the ring zone between the two sealing rings (3, 4), that the internal sealing ring (4) has a smaller cross-section than the external sealing ring (3), and that the cross-sectional difference of The two sealing rings (3, 4) are selected in dependence on the spring characteristics of the sealing material so that when the cover (2) is placed on the base body (1), at first only
the outer sealing ring (3) is pressed in a sealing manner and the inner sealing ring (4) is not yet touched by the cover (2) or the base body (1).
EP86114098A 1985-11-04 1986-10-11 Container for transporting and storing biologically hazardous materials Expired EP0223997B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853539055 DE3539055A1 (en) 1985-11-04 1985-11-04 CONTAINER FOR THE TRANSPORT AND STORAGE OF BIOSHAMBLE WASTE
DE3539055 1985-11-04

Publications (2)

Publication Number Publication Date
EP0223997A1 true EP0223997A1 (en) 1987-06-03
EP0223997B1 EP0223997B1 (en) 1989-09-13

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ID=6285115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114098A Expired EP0223997B1 (en) 1985-11-04 1986-10-11 Container for transporting and storing biologically hazardous materials

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EP (1) EP0223997B1 (en)
JP (1) JPH0640151B2 (en)
DE (2) DE3539055A1 (en)

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FR2649824A1 (en) * 1989-07-17 1991-01-18 Commissariat Energie Atomique Packaging for storage and transport of fissile materials
EP1619490A2 (en) * 2004-07-20 2006-01-25 Federal-Mogul Sealing Systems Bretten GmbH Testing device for sealing elements
EP1335387A3 (en) * 2002-02-06 2006-11-29 Holtec International, Inc. A lid for a ventilated vertical overpack
US7372933B2 (en) 2004-07-08 2008-05-13 Mitsubishi Heavy Industries, Ltd. Radioactive-material container, metal gasket for sealing the radioactive-material container, and method of manufacturing the metal gasket
CN109236743A (en) * 2018-09-28 2019-01-18 杭州鼎捷环保设备有限公司 One kind is convenient for clean environmentally friendly Blower Housing
CN109667931A (en) * 2018-12-24 2019-04-23 江苏联峰工业装备科技有限公司 A kind of cover for pressure vessel of good airproof performance
EP3792934A1 (en) * 2019-09-16 2021-03-17 GNS Gesellschaft für Nuklear-Service mbH Transport and / or storage container and method for drying transport and / or storage containers

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DE4004037C1 (en) * 1990-02-10 1991-05-23 Siempelkamp Giesserei Gmbh & Co, 4150 Krefeld, De Storage container for radioactive substance - comprises cast iron lower section and lid with soft elastic seal
DE19538008B4 (en) * 1995-10-12 2008-04-17 Areva Np Gmbh Storage container for receiving radioactive material and methods for storing spent fuel
DE19734166A1 (en) * 1997-08-07 1999-02-11 Siemens Ag Transport container for spent nuclear reactor fuel elements
DE10301385B4 (en) * 2003-01-16 2012-02-16 GNS Gesellschaft für Nuklear-Service mbH Transport and / or storage containers for radioactive waste

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FR2285686A1 (en) * 1974-09-19 1976-04-16 Housholder William CONTAINER FOR NUCLEAR FUEL
GB2010164A (en) * 1977-12-16 1979-06-27 Nl Industries Inc Dry containment of radioactive materials
FR2430651A1 (en) * 1978-07-08 1980-02-01 Transnuklear Gmbh COMPOUND LID FOR ARMORED CONTAINER FOR THE TRANSPORT AND STORAGE OF IRRADIATED FUEL ELEMENTS
FR2448768A1 (en) * 1979-02-10 1980-09-05 Nuklear Service Gmbh Gns CONTAINER FOR THE TRANSPORT AND / OR STORAGE OF RADIOACTIVE WASTE
FR2478862A1 (en) * 1980-03-19 1981-09-25 Nuklear Service Gmbh Gns COMPONENT ASSEMBLY FOR TRANSPORT AND STORAGE, SHIELDING RADIOACTIVE SUBSTANCES
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2649824A1 (en) * 1989-07-17 1991-01-18 Commissariat Energie Atomique Packaging for storage and transport of fissile materials
EP1335387A3 (en) * 2002-02-06 2006-11-29 Holtec International, Inc. A lid for a ventilated vertical overpack
US7372933B2 (en) 2004-07-08 2008-05-13 Mitsubishi Heavy Industries, Ltd. Radioactive-material container, metal gasket for sealing the radioactive-material container, and method of manufacturing the metal gasket
EP1619490A2 (en) * 2004-07-20 2006-01-25 Federal-Mogul Sealing Systems Bretten GmbH Testing device for sealing elements
CN109236743A (en) * 2018-09-28 2019-01-18 杭州鼎捷环保设备有限公司 One kind is convenient for clean environmentally friendly Blower Housing
CN109667931A (en) * 2018-12-24 2019-04-23 江苏联峰工业装备科技有限公司 A kind of cover for pressure vessel of good airproof performance
CN109667931B (en) * 2018-12-24 2024-01-12 江苏联峰工业装备科技有限公司 Pressure vessel mouth piece with good sealing performance
EP3792934A1 (en) * 2019-09-16 2021-03-17 GNS Gesellschaft für Nuklear-Service mbH Transport and / or storage container and method for drying transport and / or storage containers

Also Published As

Publication number Publication date
EP0223997B1 (en) 1989-09-13
DE3539055C2 (en) 1988-03-17
DE3665642D1 (en) 1989-10-19
JPS62108197A (en) 1987-05-19
JPH0640151B2 (en) 1994-05-25
DE3539055A1 (en) 1987-05-14

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