GB2081169A - Container for Transporting and/or Storing Radioactive Material - Google Patents

Container for Transporting and/or Storing Radioactive Material Download PDF

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Publication number
GB2081169A
GB2081169A GB8120898A GB8120898A GB2081169A GB 2081169 A GB2081169 A GB 2081169A GB 8120898 A GB8120898 A GB 8120898A GB 8120898 A GB8120898 A GB 8120898A GB 2081169 A GB2081169 A GB 2081169A
Authority
GB
United Kingdom
Prior art keywords
container
inner container
cover
transporting
screwthreaded
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
GB8120898A
Other versions
GB2081169B (en
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
Original Assignee
Transnuklear 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 Transnuklear GmbH filed Critical Transnuklear GmbH
Publication of GB2081169A publication Critical patent/GB2081169A/en
Application granted granted Critical
Publication of GB2081169B publication Critical patent/GB2081169B/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

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Stackable Containers (AREA)
  • Pressure Vessels And Lids Thereof (AREA)

Abstract

An inner container is fixed to an outer container for transporting and/or storing radioactive material, particularly irradiated fuel elements, by means of a connecting element which is easy to handle and has only a minimal space requirement. The inner container (1) is fixed through a flange (8) to the outer screwthread (3) of screwthreaded inserts (4) in the outer container (2), the screwthreaded inserts also being provided with internally screwthreaded bores (7) into which screws (6) for fixing a cover (5) are screwed. <IMAGE>

Description

SPECIFICATION container for Transporting and/or Storing Radioactive Material r This invention relates to a container for transporting and/or storing radioactive materials.
More particularly the invention relates to a connecting element for fixing an inner container in an outer container for transporting and/or storing radioactive material, particularly irradiated fuel elements from nuclear reactors.
Containers of the type used for transporting and/or storing radioactive materials, particularly spent fuel elements, are required safety to contain the radioactivity of the material accommodated in them and to show in stringent tests that their containing function is guaranteed, even in the event of serious accidents. At the same time, however, they are also required to screen off the gamma and neutron radiation released during the radioactive decay reactions and to dissipate the heat of decay to the outside.
For this reason, known containers consist of thick-walled metal outer containers, which have the necessary strength and perform the necessary radiation-shielding function, and of an inner container which provides for protection against corrosion and allows decontamination of the outer container. The inner containers are preferably designed as removable inner containers, above all for reasons of handling, testing and storage. These inner containers are either fixed to the outer container by means of clamps or are screwed to its cover.
Both solutions are complicated. The screw fixing system for example requires two rows of screwthreaded holes, one of which holds the inner container whilst the other establishes the connection between the cover and the outer container. Apart from this handling problem, another disadvantage lies in the fact that the screwthreaded holes for the cover screws have to be drilled through the inner container, with the result that the outer container is exposed to the danger of corrosion. Another disadvantage of this screw system lies in its considerable space requirement.
Accordingly, an object of the present invention is to provide a connecting element for fastening an inner container to an outer container for transporting and/or storing radioactive material, articularly irradiated fuel elements from nuclear reactors, which is easy to handle, minimises the danger of corrosion to the outer container and has gonly a minimal space requirement.
The present invention provides a container for transporting and/or storing radioactive material comprising an inner container, an outer container and a cover, the inner container being fixed by means of an inner container flange to the outer screwthread of screw-threaded inserts in the outer container, the screw-threaded inserts also being provided with axial bores with an internal screwthread into which screws for fixing the cover a screwed.
One example of an embodiment of the connecting element according to the invention is described in detail in the following with reference to the accompanying drawing.
An inner container (1) rests on an outer container (2), the inner container having a flange (8) which is provided with bores through which screw-threaded inserts (4) with an external screwthread (3) are screwed to the outer container (2). The cover (5) of the inner container (1), which is provided with sealing elements 1), is held by screws (6) which are accommodated in axial bores with an internal screwthread (7) in the screw-threaded inserts (4).
Accordingly, it is possible in accordance with the invention for the inner container (1) with the flange (8) and the cover (5) to be fixed independently of one another in a compact form in which they are safe from corrosion. According to the invention, all the component parts of the connecting element, particularly the screwthreaded inserts (4), are made of corrosionresistant material.
If, because of the design data of a transport container, the cover (5) has to be fixed for example with 24 M 32 screws (6), one M 48 external thread (3) is sufficient for the screwthreaded inserts (4) to ensure the necessary transmission of force. This guarantees that, when the cover screws (6) are removed, the screwthreaded inserts (4) remain firmly in position, i.e.
are not unscrewed. The head (9) of the screwthreaded insert (4) is shaped for convenient handling. In the case of underwater loading, a seal (10) around the screw-threaded insert (4) prevents water from entering.
Claims
1. A container for transporting and/or storing radioactive material comprising an inner container, an outer container and a cover the inner container being fixed by means of an inner container flange to the outer screw thread of screwthreaded inserts in the outer container and screwthreaded inserts also being provided with axial bores with an internal screwthread into which screws for fixing the cover are screwed.
2. A container for transporting and/or storing radioactive material substantially as described with particular reference to the accompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (2)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION container for Transporting and/or Storing Radioactive Material r This invention relates to a container for transporting and/or storing radioactive materials. More particularly the invention relates to a connecting element for fixing an inner container in an outer container for transporting and/or storing radioactive material, particularly irradiated fuel elements from nuclear reactors. Containers of the type used for transporting and/or storing radioactive materials, particularly spent fuel elements, are required safety to contain the radioactivity of the material accommodated in them and to show in stringent tests that their containing function is guaranteed, even in the event of serious accidents. At the same time, however, they are also required to screen off the gamma and neutron radiation released during the radioactive decay reactions and to dissipate the heat of decay to the outside. For this reason, known containers consist of thick-walled metal outer containers, which have the necessary strength and perform the necessary radiation-shielding function, and of an inner container which provides for protection against corrosion and allows decontamination of the outer container. The inner containers are preferably designed as removable inner containers, above all for reasons of handling, testing and storage. These inner containers are either fixed to the outer container by means of clamps or are screwed to its cover. Both solutions are complicated. The screw fixing system for example requires two rows of screwthreaded holes, one of which holds the inner container whilst the other establishes the connection between the cover and the outer container. Apart from this handling problem, another disadvantage lies in the fact that the screwthreaded holes for the cover screws have to be drilled through the inner container, with the result that the outer container is exposed to the danger of corrosion. Another disadvantage of this screw system lies in its considerable space requirement. Accordingly, an object of the present invention is to provide a connecting element for fastening an inner container to an outer container for transporting and/or storing radioactive material, articularly irradiated fuel elements from nuclear reactors, which is easy to handle, minimises the danger of corrosion to the outer container and has gonly a minimal space requirement. The present invention provides a container for transporting and/or storing radioactive material comprising an inner container, an outer container and a cover, the inner container being fixed by means of an inner container flange to the outer screwthread of screw-threaded inserts in the outer container, the screw-threaded inserts also being provided with axial bores with an internal screwthread into which screws for fixing the cover a screwed. One example of an embodiment of the connecting element according to the invention is described in detail in the following with reference to the accompanying drawing. An inner container (1) rests on an outer container (2), the inner container having a flange (8) which is provided with bores through which screw-threaded inserts (4) with an external screwthread (3) are screwed to the outer container (2). The cover (5) of the inner container (1), which is provided with sealing elements 1), is held by screws (6) which are accommodated in axial bores with an internal screwthread (7) in the screw-threaded inserts (4). Accordingly, it is possible in accordance with the invention for the inner container (1) with the flange (8) and the cover (5) to be fixed independently of one another in a compact form in which they are safe from corrosion. According to the invention, all the component parts of the connecting element, particularly the screwthreaded inserts (4), are made of corrosionresistant material. If, because of the design data of a transport container, the cover (5) has to be fixed for example with 24 M 32 screws (6), one M 48 external thread (3) is sufficient for the screwthreaded inserts (4) to ensure the necessary transmission of force. This guarantees that, when the cover screws (6) are removed, the screwthreaded inserts (4) remain firmly in position, i.e. are not unscrewed. The head (9) of the screwthreaded insert (4) is shaped for convenient handling. In the case of underwater loading, a seal (10) around the screw-threaded insert (4) prevents water from entering. Claims
1. A container for transporting and/or storing radioactive material comprising an inner container, an outer container and a cover the inner container being fixed by means of an inner container flange to the outer screw thread of screwthreaded inserts in the outer container and screwthreaded inserts also being provided with axial bores with an internal screwthread into which screws for fixing the cover are screwed.
2. A container for transporting and/or storing radioactive material substantially as described with particular reference to the accompanying drawing.
GB8120898A 1980-07-11 1981-07-07 Container for transporting and/or storing radioactive material Expired GB2081169B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19808018595 DE8018595U1 (en) 1980-07-11 1980-07-11 CONNECTING ELEMENT FOR FASTENING THE INTERNAL LINING IN A BASE BODY FOR TRANSPORT AND / OR STORING RADIOACTIVE MATERIAL

Publications (2)

Publication Number Publication Date
GB2081169A true GB2081169A (en) 1982-02-17
GB2081169B GB2081169B (en) 1983-06-08

Family

ID=6717103

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8120898A Expired GB2081169B (en) 1980-07-11 1981-07-07 Container for transporting and/or storing radioactive material

Country Status (3)

Country Link
DE (1) DE8018595U1 (en)
FR (1) FR2486700B1 (en)
GB (1) GB2081169B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5475721A (en) * 1981-03-13 1995-12-12 GNS Gesellschaft fur Nuklear-Service mbH Radiation-shielding transport and storage container
CN112285141A (en) * 2020-10-21 2021-01-29 中国核动力研究设计院 Preparation method of irradiated reactor structural material SEM sample and sample box

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455885A (en) * 1945-10-01 1948-12-07 Erich G Theurer Screw fastening
DE2359114A1 (en) * 1973-11-27 1975-05-28 Kraftwerk Union Ag Transport vessel for fuel elements - or other radioactive material with outer thermally insulated protective vessel
CH637499A5 (en) * 1979-05-07 1983-07-29 Elektrowatt Ing Ag Method for transport and storage of radioactive materials.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5475721A (en) * 1981-03-13 1995-12-12 GNS Gesellschaft fur Nuklear-Service mbH Radiation-shielding transport and storage container
CN112285141A (en) * 2020-10-21 2021-01-29 中国核动力研究设计院 Preparation method of irradiated reactor structural material SEM sample and sample box

Also Published As

Publication number Publication date
DE8018595U1 (en) 1980-11-27
GB2081169B (en) 1983-06-08
FR2486700B1 (en) 1987-12-18
FR2486700A1 (en) 1982-01-15

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930707