EP0399238A1 - Récipient de réception pour les substances radio-actives - Google Patents

Récipient de réception pour les substances radio-actives Download PDF

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Publication number
EP0399238A1
EP0399238A1 EP90107967A EP90107967A EP0399238A1 EP 0399238 A1 EP0399238 A1 EP 0399238A1 EP 90107967 A EP90107967 A EP 90107967A EP 90107967 A EP90107967 A EP 90107967A EP 0399238 A1 EP0399238 A1 EP 0399238A1
Authority
EP
European Patent Office
Prior art keywords
container
space
control room
interior
lid
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Withdrawn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
EP90107967A
Other languages
German (de)
English (en)
Inventor
Theo Staake
Walter Anspach
Roland Dipl.-Ing. Kinkl
Werner Dipl.-Ing. Botzem
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.)
Nukem GmbH
Original Assignee
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
Priority claimed from DE8905849U external-priority patent/DE8905849U1/de
Priority claimed from DE19893921621 external-priority patent/DE3921621A1/de
Application filed by Nukem GmbH filed Critical Nukem GmbH
Publication of EP0399238A1 publication Critical patent/EP0399238A1/fr
Withdrawn legal-status Critical Current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 container for holding in particular radioactive substances, such as irradiated fuel elements, comprising a container body, an axial opening which can be closed by at least two lids for loading and unloading the interior of the container with the radioactive substances, and at least one which preferably runs radially or tangentially to the interior, From the inside of the container, opening on the outside of the container, which can be closed with a closure device, wherein a gap between the covers, which can be checked by means of a monitoring device, is formed between the covers.
  • radioactive substances such as irradiated fuel elements
  • each opening in the container can be closed at least in each case with a cover element.
  • a lid gap between the inner and outer lid can be filled with a control gas, the pressure of which is different from the pressure both inside the container and the outside pressure.
  • sniffing devices can be used to determine whether the leak is towards the inside or outside of the container has occurred. The latter enables the outer cover to be replaced. If, on the other hand, a leak has been found on the inner cover, a third cover is applied to the second cover in order to meet the storage requirements. A controllable and monitorable intermediate space is then again formed between the two outer covers.
  • Containers intended for transport can e.g. have two radial openings from the interior of the container which are only provided with a closure element such as a lid. The inside of the container or the like can be rinsed through these openings.
  • the object of the present invention is to design a container of the type mentioned at the outset in such a way that it is suitable both for the transport and for the storage of radioactive substances.
  • a further object of the invention is to ensure, with simple means, whether existing covers or closure devices are leaking, with the aim of restoring tightness, if necessary, with simplified measures.
  • the closure device of the further opening comprises an inner and an outer cover element and that a control room connected to a monitoring device is formed between the inner and the outer cover element.
  • the control room itself is preferably filled with a control gas, the pressure of which is above that of the interior of the container and the external pressure surrounding the container. This measure makes it possible to determine whether the inner or outer seal is leaking, while at the same time ensuring that radioactivity cannot escape to the outside if the inner seal leaks.
  • the invention is characterized in that the intermediate space between the cover and the control room are interconnected and can be checked using at least one monitoring device.
  • the presence of the same number of covers or cover elements that can be closed off the axial opening or the further openings is advantageous if the interspaces to be monitored are connected to one another. Either the existing connection lines or new ones can be used to ensure monitoring with a control device.
  • the lines connecting the spaces to be monitored are preferably in the container wall, e.g. embedded in a groove.
  • a casing surrounding the container body e.g. A neutron moderator can of course also run in this. Other measures are also possible.
  • the teaching according to the invention can be implemented in a container of the type described above, which has further openings both in the bottom area and in the lid area, which can be closed by at least two lid elements, between each of which an intermediate space to be checked is formed. Even in the case of a corresponding configuration, a joint check of all those to be checked and those formed between closures is required Spaces are provided which are interconnected by lines.
  • the invention features a container for holding radioactive substances, such as fuel elements, comprising a container body, an axial opening that can be closed by at least two lids for loading and unloading the container interior with the radioactive substances, and at least one that preferably runs radially or tangentially to the container interior.
  • a further opening or side opening that can be closed with a closure device, wherein a cover space that can be checked by means of a monitoring device is formed between the covers, characterized in that the closure device of the side opening comprises an inner and an outer cover element and that between the inner and the outer cover element, a control room is formed, which is connected to the cover space.
  • the pressure in the space between the lid or closure elements has a value which is considerably lower than that in the interior of the container and the atmospheric pressure, in particular a value between 5 to 50 mbar (50-500 Pa) , preferably of 10 mbar (100 PA). This low pressure can easily be built up in the respective space and can be maintained for many years if metal seals are used.
  • a control device can be activated if there is a pressure change of 50 - 200 mbar (500 - 2,000 Pa), preferably of 100 - 150 mbar (1,000 - 1,500 PA) in the gap. This means that, compared to an overpressure in the intermediate space, a much faster reaction takes place, so that consequently an earlier detection of the failure of a seal is possible. Since the container space normally has a pressure of 0.6 bar (6 x 103 Pa), a statement can therefore be made relatively quickly as to whether the inner or outer seal is leaking. If the pressure in the space rises above that of the container space, then one knows that the outer seal must be faulty.
  • a container (10) for the transport of radioactive substances in particular is shown, which is suitable for both transport and storage.
  • the container (10) has a container body (12) which surrounds a container interior (14) which can be closed by means of a first inner cover (16) and a second outer cover (18), which in turn in the exemplary embodiment is not shown in detail in Form the container body (12).
  • a measure, in particular with regard to the inner cover (16) is not necessarily necessary.
  • the container body (12) and the lid (16) and (18) are made of suitable radiation-absorbing materials such as in particular forged steel or cast iron such as cast steel or nodular cast iron. Furthermore, side openings (20) and (22) run both from the bottom and from the lid area of the container interior (14), each of which can be closed with two cover elements (24) and (26) or (28) and (30). The side openings (20) and (22), which pass through the container jacket (12) and end in the area of its outer surface, serve in particular to enable the interior of the container (14) to be checked or flushed through.
  • suitable radiation-absorbing materials such as in particular forged steel or cast iron such as cast steel or nodular cast iron.
  • side openings (20) and (22) run both from the bottom and from the lid area of the container interior (14), each of which can be closed with two cover elements (24) and (26) or (28) and (30).
  • the side openings (20) and (22) which pass through the container jacket (12) and end in the area of its outer surface, serve in particular to enable the interior of the
  • an intermediate space (32), (34) and (36) is formed, which can be checked using purely schematically illustrated monitoring devices (38), (40) and (42).
  • the spaces (32), (34) and (36) are preferably filled with a control gas, the pressure of which is different from that in the interior of the container (14) and the outside pressure, that is to say the atmospheric pressure.
  • a maintenance case of the container (10) is shown in the exemplary embodiment in FIG. 2.
  • each outer closure element that is to say the outer cover (18) and the outer cover element (26) and (30)
  • a further closure element that is to say a third cover (50) or respectively a third cover element (52) and (54 ) covered, which in turn are sealed against the container body (12) with the schematically drawn circumferential seals.
  • the control room now to be monitored is formed between the covers (18) and (50) or the cover elements (26) and (52) and (30) and (54). These control rooms can then be monitored separately with monitoring devices.
  • FIGS. 3 and 4 differ from those of FIGS. 2 and 3 in that the interspaces to be monitored are interconnected in order to enable control by means of a single monitoring device (56).
  • the connection between the spaces to be checked is established via a line (58), which can run in a suitable form inside the container body (12) or along its outer surface. If there is a neutron moderator surrounding the container body (12), a course in this should preferably be selected.
  • the monitoring device (56) is arranged purely schematically outside the container (10), there is also the possibility of arranging the monitoring device within the control room or the cover space in order to transmit signals wirelessly or via lines.
  • the line (58) runs between the intermediate or control rooms then formed, likewise for simplified monitoring to enable.
  • the line (58) according to FIG. 4 can correspond to that according to FIG. 3.
EP90107967A 1989-05-10 1990-04-26 Récipient de réception pour les substances radio-actives Withdrawn EP0399238A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8905849U DE8905849U1 (fr) 1989-05-10 1989-05-10
DE8905849U 1989-05-10
DE3921621 1989-06-30
DE19893921621 DE3921621A1 (de) 1989-06-30 1989-06-30 Behaelter zur aufnahme von radioaktiven materialien und verfahren zu dessen ueberwachung

Publications (1)

Publication Number Publication Date
EP0399238A1 true EP0399238A1 (fr) 1990-11-28

Family

ID=25882546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90107967A Withdrawn EP0399238A1 (fr) 1989-05-10 1990-04-26 Récipient de réception pour les substances radio-actives

Country Status (1)

Country Link
EP (1) EP0399238A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2010164A (en) * 1977-12-16 1979-06-27 Nl Industries Inc Dry containment of radioactive materials
FR2486701A1 (fr) * 1980-07-08 1982-01-15 Nuklear Service Gmbh Gns Conteneur blinde pour le transport et le stockage de substances radioactives
EP0044023A1 (fr) * 1980-07-11 1982-01-20 TRANSNUKLEAR GmbH Récipient de transport et/ou de stockage pour matières radioactives
US4456827A (en) * 1980-07-11 1984-06-26 Transnuklear Gmbh Transportation and/or storage containers for radioactive material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2010164A (en) * 1977-12-16 1979-06-27 Nl Industries Inc Dry containment of radioactive materials
FR2486701A1 (fr) * 1980-07-08 1982-01-15 Nuklear Service Gmbh Gns Conteneur blinde pour le transport et le stockage de substances radioactives
EP0044023A1 (fr) * 1980-07-11 1982-01-20 TRANSNUKLEAR GmbH Récipient de transport et/ou de stockage pour matières radioactives
US4456827A (en) * 1980-07-11 1984-06-26 Transnuklear Gmbh Transportation and/or storage containers for radioactive material

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Effective date: 19921215