EP0084840A1 - Method of closing a container receiving radioactive materials - Google Patents

Method of closing a container receiving radioactive materials Download PDF

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Publication number
EP0084840A1
EP0084840A1 EP83100375A EP83100375A EP0084840A1 EP 0084840 A1 EP0084840 A1 EP 0084840A1 EP 83100375 A EP83100375 A EP 83100375A EP 83100375 A EP83100375 A EP 83100375A EP 0084840 A1 EP0084840 A1 EP 0084840A1
Authority
EP
European Patent Office
Prior art keywords
container
solder
container body
sealing
metallic
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
Application number
EP83100375A
Other languages
German (de)
French (fr)
Other versions
EP0084840B1 (en
Inventor
Jürgen Dipl.-Ing. Wemheuer
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.)
Deutsche Gesellschaft fuer Wiederaufarbeitung von Kernbrennstoffen mbH
Nukem GmbH
Original Assignee
Deutsche Gesellschaft fuer Wiederaufarbeitung von Kernbrennstoffen mbH
Nukem GmbH
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 Deutsche Gesellschaft fuer Wiederaufarbeitung von Kernbrennstoffen mbH, Nukem GmbH filed Critical Deutsche Gesellschaft fuer Wiederaufarbeitung von Kernbrennstoffen mbH
Publication of EP0084840A1 publication Critical patent/EP0084840A1/en
Application granted granted Critical
Publication of EP0084840B1 publication Critical patent/EP0084840B1/en
Expired 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
    • G21F5/12—Closures for containers; Sealing arrangements

Definitions

  • the invention relates to a method for sealing a ceramic container for the long-term storage of spent nuclear reactor fuel elements or other radioactive substances, with a container base body open on one side and a closure lid.
  • the invention has for its object to provide a method for sealing a ceramic container for long-term storage of spent nuclear fuel, which is characterized by a good and tight connection between the cap and the container body.
  • the object is achieved in that the closure lid and the container body are connected with a metallic solder.
  • the method according to the invention creates a good connection between the container body and the closure cover. Because of the method according to the invention, a simple handling technique is possible when closing the containers in a hot cell.
  • solder molded parts are placed between the joint surfaces in a suitable form.
  • the suitable heating device heats up until the metallic solder spreads in the area of the joining surfaces, binding forces acting between the soldering partners.
  • This proposed method is particularly suitable for placing the metallic solder in the hot cell only after loading with the nuclear fuels.
  • a further advantageous embodiment of the invention is characterized by the features listed in claim 3.
  • the joining surfaces are pre-coated outside of the hot cell with the metallic solder. During the process of sealing in the hot cell, only a brief melting of the solder is necessary. The base material of the container body and the sealing lid can no longer be heated to the soldering temperature. This relatively simple melting of the solder coating can be achieved by simple induction heating.
  • the invention also relates to a container for the long-term storage of spent nuclear reactor fuel elements.
  • the ceramic container shown in the drawing has a container body 1, which is cylindrical and is open on one side. Furthermore, the container has a closure lid 2. Sealing lid 2 and container base body 1 lie on top of one another, including an annular shaped part 3 made of metallic solder. The joining surfaces of the closure cover 2 and the container body 1 are stepped. The metallic solder molded part 3 is deformed in accordance with these steps.
  • the container is loaded with spent nuclear fuel in a shielded room, a so-called "hot cell", by remote control.
  • the annular solder molded part 3 is placed on the joining surfaces of the container base body 1.
  • the sealing lid 2 which is shaped accordingly with its joining surface, is placed on the container base body 1 and thus on the annular solder molded part 3.
  • a suitable heating device heats the solder molded part 3 as well as the container base body 1 and the sealing cover 2 in the area of the joining surfaces until the solder melts and the joining surfaces are wetted. Binding forces are effective between the soldering partners.
  • the main body of the container and the cap consisted of A1 2 0 3 .
  • TiPd solder was used as the metallic solder because titanium has a high affinity for oxygen.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Closures For Containers (AREA)
  • Fuel Cell (AREA)
  • Closing Of Containers (AREA)
  • Gasket Seals (AREA)
  • Packages (AREA)

Abstract

1. A method of sealing tight a ceramic container for long-term storage of burnt-out nuclear-reactor fuel elements or other radioactive materials with a basic container body open one side and a sealing cover, characterized in that the sealing cover and the basic container body are joined together with metallic solder.

Description

Die Erfindung betrifft ein Verfahren zum dichten Verschließen eines keramischen Behälters zur Langzeitlagerung von abgebrannten Kernreaktorbrennelementen oder anderen radioaktiven Stoffen, mit einem einseitig offenen Behältergrundkörper und einem Verschlußdeckel.The invention relates to a method for sealing a ceramic container for the long-term storage of spent nuclear reactor fuel elements or other radioactive substances, with a container base body open on one side and a closure lid.

Für die Langzeitlagerung bzw. direkte Endlagerung abgebrannter Kernbrennstoffe werden neben metallischen Behältern auch keramische Behälter vorgeschlagen. Diese keramischen Behälter weisen sowohl die erforderliche Standfestigkeit als auch die chemische Beständigkeit über den erforderlichen langen Zeitraum auf.In addition to metallic containers and ceramic containers are ernbrennstoffe for long-term storage or direct disposal of spent K suggested. These ceramic containers have both the required stability and the chemical resistance over the long period required.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum dichten Verschließen eines keramischen Behälters zur Langzeitlagerung von abgebranntem Kernbrennstoff zu schaffen, das sich durch eine gute und dichte Verbindung zwischen Verschlußdeckel und Behältergrundkörper auszeichnet.The invention has for its object to provide a method for sealing a ceramic container for long-term storage of spent nuclear fuel, which is characterized by a good and tight connection between the cap and the container body.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Verschlußdeckel und der Behältergrundkörper mit einem metallischen Lot verbunden werden.The object is achieved in that the closure lid and the container body are connected with a metallic solder.

Es hat sich gezeigt, daß mit dem erfindungsgemäßen Verfahren eine gute Verbindung zwischen Behältergrundkörper und.Verschlußdeckel geschaffen wird. Aufgrund des erfindungsgemäßen Verfahrens ist eine einfache Handhabungstechnik bei dem Verschließen der Behälter in einer Heißen Zelle möglich.It has been shown that the method according to the invention creates a good connection between the container body and the closure cover. Because of the method according to the invention, a simple handling technique is possible when closing the containers in a hot cell.

Eine vorteilhafte Ausgestaltung der Erfindung wird durch die im Kennzeichen des Anspruches 2 genannten Merkmale aufgezeigt. Die Lotformteile werden in jeweils geeigneter Form zwischen die Fügeflächen gelegt. Durch die geeignete Heizvorrichtung wird soweit aufgeheizt, bis sich im Bereich der Fügeflächen das metallische Lot ausbreitet, wobei zwischen den Lötpartnern Bindekräfte wirksam werden. Dieses vorgeschlagene Verfahren ist besonders dafür geeignet, das metallische Lot erst in der Heißen Zelle nach dem Beladen mit den Kernbrennstoffen aufzulegen.An advantageous embodiment of the invention is shown by the features mentioned in the characterizing part of claim 2. The solder molded parts are placed between the joint surfaces in a suitable form. The suitable heating device heats up until the metallic solder spreads in the area of the joining surfaces, binding forces acting between the soldering partners. This proposed method is particularly suitable for placing the metallic solder in the hot cell only after loading with the nuclear fuels.

Eine weitere vorteilhafte Ausgestaltung der Erfindung wird durch die im Anspruch 3 aufgeführten Merkmale gekennzeichnet. Die Fügeflächen werden bereits außerhalb der Heißen Zelle mit dem metallischen Lot vorbeschichtet. Während des Vorganges des Verschließens in der Heißen Zelle ist nur ein kurzzeitiges Aufschmelzen des Lotes notwendig. Der Grundwerkstoff von Behältergrundkörper und Verschlußdeckel bracht nicht mehr auf Löttemperatur aufgeheizt zu werden. Dieses relativ einfache Auf schmelzen der Lötbeschichtung läßt sich durch eine einfache induktive Erwärmung erreichen.A further advantageous embodiment of the invention is characterized by the features listed in claim 3. The joining surfaces are pre-coated outside of the hot cell with the metallic solder. During the process of sealing in the hot cell, only a brief melting of the solder is necessary. The base material of the container body and the sealing lid can no longer be heated to the soldering temperature. This relatively simple melting of the solder coating can be achieved by simple induction heating.

Die Erfindung betrifft auch einen·Behälter zur Langzeitlagerung von abgebrannten Kernreaktorbrennelementen gemäß Anspruch 4.The invention also relates to a container for the long-term storage of spent nuclear reactor fuel elements.

Anhand der Zeichnung wird nachstehend ein Ausführungsbeispiel der Erfindung näher erläutert.An exemplary embodiment of the invention is explained in more detail below with reference to the drawing.

Der in der Zeichnung dargestellte keramische Behälter weist einen Behältergrundkörper 1 auf, der zylindrisch ausgebildet und einseitig offen ist. Weiter weist der Behälter einen Verschlußdeckel 2 auf. Verschlußdeckel 2 und Behältergrundkörper 1 liegen unter Einschluß eines ringförmigen Formteiles 3 aus metallischem Lot aufeinander. Die Fügeflächen von dem Verschlußdeckel 2 und dem Behältergrundkörper 1 sind stufenförmig ausgebildet. Das metallischeLotformteil 3 ist diesen Stufen entsprechend verformt.The ceramic container shown in the drawing has a container body 1, which is cylindrical and is open on one side. Furthermore, the container has a closure lid 2. Sealing lid 2 and container base body 1 lie on top of one another, including an annular shaped part 3 made of metallic solder. The joining surfaces of the closure cover 2 and the container body 1 are stepped. The metallic solder molded part 3 is deformed in accordance with these steps.

Die Beladung des Behälters mit abgebrannten Kernbrennstoffen wird in einem abgeschirmten Raum, einer sogenannten "Heißen Zelle", mittels Fernbedienung vorgenommen. Wenn der Behältergrundkörper 1 mit den abgebrannten Kernbrennstoffen beladen ist, wird das ringförmige Lotformteil 3 auf die Fügeflächen des Behältergrundkörpers 1 aufgelegt. Anschließend wird der mit seiner Fügefläche entsprechend geformte Verschlußdeckel 2 auf den Behältergrundkörper 1 und damit auf das ringförmige Lotformteil 3 aufgesetzt.The container is loaded with spent nuclear fuel in a shielded room, a so-called "hot cell", by remote control. When the container base body 1 is loaded with the spent nuclear fuel, the annular solder molded part 3 is placed on the joining surfaces of the container base body 1. Subsequently, the sealing lid 2, which is shaped accordingly with its joining surface, is placed on the container base body 1 and thus on the annular solder molded part 3.

Durch eine geeignete Heizvorrichtung werden das Lotformteil 3 sowie der Behältergrundkörper 1 und der Verschlußdeckel 2 im Bereich der Fügeflächen soweit aufgeheizt, bis das Lot schmilzt und die Fügeflächen benetzt. Zwischen den Lötpartnern werden Bindekräfte wirksam.A suitable heating device heats the solder molded part 3 as well as the container base body 1 and the sealing cover 2 in the area of the joining surfaces until the solder melts and the joining surfaces are wetted. Binding forces are effective between the soldering partners.

Der Behältergrundkörper und der Verschlußdeckel bestanden aus A1203. Als metallisches Lot wurde TiPd-Lot verwendet, weil Titan eine hohe Affinität zu Sauerstoff hat.The main body of the container and the cap consisted of A1 2 0 3 . TiPd solder was used as the metallic solder because titanium has a high affinity for oxygen.

Claims (4)

1. Verfahren zum dichten Verschließen eines keramischen Behälters zur Langzeitlagerung von abgebrannten Kernreaktorbrennelementen oder anderen radioaktiven Stoffen mit einem einseitig offenen Behältergrundkörper und einem Verschlußdeckel,
dadurch gekennzeichnet,
daß der Verschlußdeckel und der Behältergrundkörper mit einem metallischen Lot verbunden werden.1. Method for tightly closing a ceramic container for long-term storage of spent nuclear reactor fuel elements or other radioactive substances with a container body that is open on one side and a sealing lid,
characterized,
that the closure lid and the container body are connected with a metallic solder. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet,
daß zwischen die Fügeflächen von Verschlußdeckel und Behältergrundkörper ein oder mehrere Lotformteile gelegt werden, daß durch eine geeignete Heizvorrichtung Lotformkörper, Behältergrundkörper und Verschlußdeckel im Bereich der Fügeflächen soweit aufgeheizt werden, bis das Lot die Fügeflächen benetzt.2. The method according to claim 1, characterized in that
that one or more solder molded parts are placed between the joint surfaces of the closure lid and container base body, that the solder molded body, container base body and closure lid in the region of the joint surfaces are heated by a suitable heating device until the solder wets the joint surfaces. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet,
daß die Fügeflächen von Behältergrundkörper und Verschlußdeckel mit dem metallischen Lot vorbeschichtet werden, daß nach dem Beladen des Behältergrundkörpers mit den radioaktiven Stoffen der Verschlußdeckel auf den Behältergrundkörper gesetzt wird und daß ein kurzzeitiges Aufschmelzen der Lotbeschichtungen vorgenommen wird.3. The method according to claim 1, characterized in
that the joining surfaces of B ehältergrundkörper and closure cover are precoated with the metallic solder, that is set after the loading of the container body with the radioactive materials the sealing cover on the container body and that a short-time melting of the solder coatings is made. 4. Behälter zur Langzeitlagerung von abgebrannten Kernreaktorbrennelementen oder anderen radioaktiven Stoffen, der aus einem einseitig offenen Behältergrundkörper und einem Verschlußdeckel besteht, wobei Behältergrundkörper und Verschlußdeckel aus einem keramischen Werkstoff bestehen, dadurch gekennzeichnet, daß der Behältergrundkörper ( 1 ) und der Verschlußdeckel ( 2 ) durch eine metallische Lotschicht ( 3 ) miteinander verbunden sind.4. Container for long-term storage of spent nuclear reactor fuel elements or other radioactive substances, which consists of a container body open on one side and a sealing cap, wherein the container body and sealing cap consist of a ceramic material, characterized in that the container body (1) and the sealing cap (2) through a metallic solder layer (3) are connected to one another.
EP83100375A 1982-01-22 1983-01-18 Method of closing a container receiving radioactive materials Expired EP0084840B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823201884 DE3201884A1 (en) 1982-01-22 1982-01-22 METHOD FOR CLOSING CONTAINERS CONTAINING RADIOACTIVE SUBSTANCES
DE3201884 1982-01-22

Publications (2)

Publication Number Publication Date
EP0084840A1 true EP0084840A1 (en) 1983-08-03
EP0084840B1 EP0084840B1 (en) 1986-01-02

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EP83100375A Expired EP0084840B1 (en) 1982-01-22 1983-01-18 Method of closing a container receiving radioactive materials

Country Status (6)

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EP (1) EP0084840B1 (en)
JP (1) JPS58171700A (en)
BR (1) BR8300194A (en)
CA (1) CA1201221A (en)
DE (2) DE3201884A1 (en)
ES (1) ES519263A0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141967A1 (en) * 1983-09-24 1985-05-22 STEAG Kernenergie GmbH Closing method for a radio-active material container
US4702391A (en) * 1984-12-22 1987-10-27 Kernforschungszentrum Karlsruhe Gmbh Containment with long-time corrosion resistant cover for sealed containers with highly radioactive content

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012101300B3 (en) * 2012-02-17 2013-04-18 Nuclear Cargo + Service Gmbh Locking device for containers for transporting radioactive substances
JP2013181858A (en) * 2012-03-02 2013-09-12 Tadashi Matsui Method for treating radioactive contaminant

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU39839A1 (en) * 1960-03-17 1961-04-28
FR1347402A (en) * 1963-01-23 1963-12-27 Lemer & Cie Improvements to armored containers and packaging intended for the transport of radioelements
FR2375696A1 (en) * 1976-12-21 1978-07-21 Asea Ab PROCESS FOR ENCLOSING USED NUCLEAR FUEL OR WASTE NUCLEAR FUEL
US4115311A (en) * 1977-03-10 1978-09-19 The United States Of America As Represented By The United States Department Of Energy Nuclear waste storage container with metal matrix
DE2942092A1 (en) * 1979-10-18 1981-04-30 Steag Kernenergie Gmbh, 4300 Essen Long term storage of spent fuel elements - in graphite container resistant to corrosion with external metal cover
EP0061067A1 (en) * 1981-03-20 1982-09-29 Asea Ab Method of storing spent fuel rods in a copper container

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU39839A1 (en) * 1960-03-17 1961-04-28
FR1347402A (en) * 1963-01-23 1963-12-27 Lemer & Cie Improvements to armored containers and packaging intended for the transport of radioelements
FR2375696A1 (en) * 1976-12-21 1978-07-21 Asea Ab PROCESS FOR ENCLOSING USED NUCLEAR FUEL OR WASTE NUCLEAR FUEL
US4115311A (en) * 1977-03-10 1978-09-19 The United States Of America As Represented By The United States Department Of Energy Nuclear waste storage container with metal matrix
DE2942092A1 (en) * 1979-10-18 1981-04-30 Steag Kernenergie Gmbh, 4300 Essen Long term storage of spent fuel elements - in graphite container resistant to corrosion with external metal cover
EP0061067A1 (en) * 1981-03-20 1982-09-29 Asea Ab Method of storing spent fuel rods in a copper container

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141967A1 (en) * 1983-09-24 1985-05-22 STEAG Kernenergie GmbH Closing method for a radio-active material container
US4702391A (en) * 1984-12-22 1987-10-27 Kernforschungszentrum Karlsruhe Gmbh Containment with long-time corrosion resistant cover for sealed containers with highly radioactive content

Also Published As

Publication number Publication date
DE3201884A1 (en) 1983-08-04
JPS58171700A (en) 1983-10-08
DE3361648D1 (en) 1986-02-13
CA1201221A (en) 1986-02-25
EP0084840B1 (en) 1986-01-02
BR8300194A (en) 1983-10-11
ES8404555A1 (en) 1984-04-16
ES519263A0 (en) 1984-04-16

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