EP0169440B1 - Verfahren zum Schliessen eines Behälters zur Aufnahme von radioaktivem Material und Behälter zur Durchführung des Verfahrens - Google Patents

Verfahren zum Schliessen eines Behälters zur Aufnahme von radioaktivem Material und Behälter zur Durchführung des Verfahrens Download PDF

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Publication number
EP0169440B1
EP0169440B1 EP85108580A EP85108580A EP0169440B1 EP 0169440 B1 EP0169440 B1 EP 0169440B1 EP 85108580 A EP85108580 A EP 85108580A EP 85108580 A EP85108580 A EP 85108580A EP 0169440 B1 EP0169440 B1 EP 0169440B1
Authority
EP
European Patent Office
Prior art keywords
container body
face
closure cap
container
contact
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 - Lifetime
Application number
EP85108580A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0169440A3 (en
EP0169440A2 (de
Inventor
Heinz Dipl.-Ing. Bienek
Wilhelm Dr. Dipl.-Ing. Wick
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.)
Steag Kernenergie GmbH
Original Assignee
Steag Kernenergie 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 Steag Kernenergie GmbH filed Critical Steag Kernenergie GmbH
Priority to AT85108580T priority Critical patent/ATE69119T1/de
Publication of EP0169440A2 publication Critical patent/EP0169440A2/de
Publication of EP0169440A3 publication Critical patent/EP0169440A3/de
Application granted granted Critical
Publication of EP0169440B1 publication Critical patent/EP0169440B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49758—During simulated operation or operating conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part

Definitions

  • the invention relates to a method for closing a container made of metallic material for receiving radioactive material, in particular radioactive material introduced into an inner container, in which a closure lid is at least partially inserted into a front receiving opening of a basic container body under radial guidance, the closure lid under a predetermined Contact force that significantly exceeds the weight of the closure lid is held in contact with a contact surface of the container base body formed in the region of the front receiving opening and is welded to the container base body in this position.
  • the invention further relates to a container suitable for carrying out this method.
  • the thermal loading during welding can lead to bulging or opening in both cover configurations, which corresponds to a stress load on the weld seam.
  • the invention has for its object to improve the method of the generic type and the container suitable for carrying out this method so that the welded seam with the container base body of corrosion-critical shear, shear and tensile stresses, in particular under the considerable mechanical long-term loads, with a high load capacity of the closure lid is largely exempt from final storage.
  • This object is achieved procedurally in that an at least on its inner surface domed closure cap is used and that the predetermined contact pressure between a radially extending bearing surface of the closure cover and a radially extending contact surface of the container body is made effective.
  • the sealing cover By pressing the sealing cover against the radially running contact surface of the container body, a surface contact is maintained during welding, which avoids bulges or gaps as a result of thermal stress during welding.
  • the dome-like arched inner surface of the cover when it is loaded under the rock pressure during final storage, practically no corrosion-critical loads and tensions are introduced into the weld seam, because the cover, which is curved at least on the inside, largely resists bulging inwards and to avoid corrosion-critical loads and tensions in the welded connection between the closure lid and the container base body in the repository, it is important to press the closure lid against the contact surface of the container base body with a contact force that significantly exceeds the weight of the closure lid during the construction of the welded connection.
  • the contact pressure is preferably selected in the amount of the external load expected in the final deposit.
  • a particularly simple procedure when closing the container in the hot cell can be achieved in a further development of the invention in that the contact pressure is built up by means of a pressing device acting on the cover from the outside and the pressing device is removed after the welding. After the pressing device has been removed, the weld itself bears the contact pressure or preload force until an external pressure builds up in the repository. In the repository, however, the welded connection becomes stress-free again, so that stress corrosion cracking is avoided.
  • This contact pressure is preferably removed by a positive or non-positive engagement between the closure lid and the container body, that is to say not at least not only by the welded connection.
  • the invention provides in a further development that the contact pressure is built up by means of a positive engagement between the closure lid and the container body, preferably by means of a thread engagement between an external thread of the closure lid and an internal thread of the container body. In this case, the flank load of the positive engagement is relieved in the case of the external pressure load on the closure cover.
  • a thread engagement as A bayonet lock or the like can also be provided in a form-fitting manner.
  • the container made of metallic material suitable for carrying out the method according to the invention which is provided with a container base body with an end-side receiving opening and a contact surface formed in the region of the end-side receiving opening and a radially guided sealing cover, wherein the sealing cover is welded to the front receiving opening of the basic container body and is held in contact with the contact surface of the basic container body under the action of a predetermined contact pressure, is characterized in that the closure lid is domed at least on its inner surface and is provided with a radially extending bearing surface which can be placed on the radially extending bearing surface.
  • the closure cover is preferably provided with an external thread which engages with an internal thread formed in the region of the front receiving opening. This results in a particularly simple application of the contact pressure and there is no stress on the weld seam when transport aids are attacked on the cover.
  • closure cover prefferably be provided with an external shrink engagement surface, which has an area in the region of the front-side receiving opening provided internal shrink engagement surface is in shrink engagement.
  • the production of external and internal threads or other positive engagement means can be dispensed with.
  • the outer surface of the closure lid can, for. B. be a radially extending flat surface. However, it is preferred that the lid is also domed on its outer surface.
  • the cover is provided on its dome-like curved outer surface with a ring-like projection, the outer diameter of which is adapted to the inner diameter of the front receiving opening at its free end.
  • the lid with a circumferential flange which rests and / or rests on a corresponding annular surface of the basic container body.
  • a transport mushroom When using a ring-like approach, a transport mushroom can advantageously be screwed into this.
  • a mold 2 with highly radioactive waste is introduced into a container base body 1, which consists of a double-domed base 1a, a straight-cylindrical jacket 1b and a receiving opening area 1c, a gap remaining with the inner surface 3 of the jacket 1b.
  • a relief groove 4 and a radially extending ring-like contact surface 5 are provided in the transition region between the casing 1b and the receiving opening region 1c (cf. FIG. 1).
  • Adjacent to the contact surface 5 are an axially extending guide surface 6, an internal thread 7, a shorter guide surface 6 'and a joining surface 8.
  • the internal thread 7 is preferably designed as a conical thread.
  • a cover 9 is screwed, which rests on the contact surface 5 with an annular bearing surface 10. Furthermore, it is guided with guide sections 11 and 11 'on the guide surface 6 or 6' and is in threaded engagement with the internal thread 7 with an external thread 12.
  • the inner surface 13 enclosed by the bearing surface 10 and the outer surface 14 of the cover 9 are domed like a dome.
  • the cover 9 is provided with a ring-like extension 15 which has a joint surface 16 corresponding to the joint surface 8.
  • the lid 9 is screwed in between the surfaces 5 and 10 until a predetermined contact pressure is reached. Then a sealing weld 17 is built up between the two joining surfaces 8 and 16.
  • the weld seam can be built up by introducing welding aids or by welding without a welding wire.
  • the dome-like design of the bottom 1 a and the cover 9 enables additional shields 18 and 19 to be introduced, the additional cover shield 19 being secured in the cover by a ring 20.
  • the ring extension 15 enables the screwing in of a transport mushroom shown in broken lines in FIG. 1, which can be unscrewed in the deposit.
  • the depth of the corrosion path is determined by the depth of the weld joint 17 and can be extended by a corresponding extension of the ring extension 15 and the container body.
  • the wall thicknesses of the container bottom 1a and lid 9 are made thinner than the wall thickness of the jacket 1b. As a result, the different radial deformation of the dome-shaped cover or the dome-like curved base is compensated for within certain limits.
  • the dome-like outer surface of the additional lid shield 19 is arranged at a certain distance from the inner surface 13 of the lid, so that the inner additional shield 19 is radially displaceable to a certain extent, so that the container jacket in the lid area is free under the external pressure load can deform without the shield 19 and thus the retaining ring 20 are loaded.
  • the additional shielding 18 is also designed relative to the floor 1a in such a way that it can be moved radially.
  • a peripheral flange 21a is provided on a closure cover 21, the underside 21b of which is welded to the free end face of the receiving opening area 1c.
  • the guide surface 6 'between the thread 7 and the free end face is designed to fit tightly in order to avoid a radial displacement of the cover 21.
  • a peripheral flange 23 is provided on a cover 22, the substantially axially extending outer surface 23a of which is welded to a partial surface of the receiving opening region 1c that extends in the circumferential direction.
  • the contact surface 5 of the basic container body 1 is followed by a smooth-faced, straight-cylindrical and axially extending engagement surface 24, which is followed by the joining surface 8; these areas together determine the receiving opening area 1c.
  • a closure cover 25 is shrunk, which rests with its ring-like contact surface 10 on the contact surface 5 under a predetermined contact force that exceeds the weight of the closure cover.
  • the closure cover 25, like the cover 9, has domed surfaces 13 and 14 and an annular extension 15 with a joint surface 16 corresponding to the joint surface 8.
  • the lid is provided with a shrink engagement surface 26 which is in shrink engagement with the surface 24.
  • the mold 2 is centered at its upper end with respect to the container and secured against axial displacement in the repository container by means of a fastening ring 27 with a welded-on slotted spring element 28, which rests on the securing ring 20.
  • This measure can also be used with advantage in the embodiments according to FIGS. 1-3.
  • the receiving opening area 1c is heated, preferably inductively from the outside. Then the lid, previously cooled to ambient temperature, is inserted into the receptacle and, while maintaining a force applied to the lid 25 from the outside by means of a pressing device, is held in abutment on the contact surface 5 until there is temperature compensation between the lid and the container body.
  • the geometry and fit of the lid and the receiving area are selected so that after the temperature has been equalized, the lid is held immovably in the base body of the container due to the adhesive forces caused by the compressive stress such that even after the forces acting from outside have been reduced (symbolically in FIG attacking arrows K) the predetermined contact pressure between the surfaces 5 and 10 is maintained.
  • the subsequent preheating of the lid and container body in the area of the joining surfaces 8 and 16 and the construction of the weld seam 17 uniformly heats both components and thus deforms them in such a way that the radially directed compressive stress and the axially directed predetermined contact force are retained.
  • a graduated fit for. B. to use a graded fit with approximately the same length of seat and different tolerance zones. You can e.g. B. to the weld 17 subsequent fit with a larger diameter than a press fit and the fit below and adjacent to the contact surface 5 of a smaller diameter can be designed as a transition fit.
  • a shrinking engagement can be provided instead of a threaded engagement to hold the contact pressure.
  • the diffusion welding can be the entire engagement surface or part of the z. B. cover like a ring, as indicated in Figure 4 by the reference character D.
  • the diffusion welding can at least partially relieve the external weld 17 or possibly completely replace it. For safety reasons, however, the construction of an externally controllable weld seam is always preferred.
  • Non-alloyed or low-alloyed steels or cast materials are preferably used as the metallic material for container base body 1 and cover 9, 21, 22 and 26. Between the contact surfaces 5 and 10, a seal can also be built, for. B. by Introducing a silver ring or foil or by diffusion welding according to P 33 34 660.
  • the weld can be built up by known methods, e.g. B. electron beam or inductive.
  • the embodiment according to FIG. 1 is preferred in terms of welding technology because in this embodiment relatively small masses of material have to be heated in order to build up the weld seam 17.
  • the weld seam is not subjected to tensile or shear stresses, and that when the high operating pressure is applied to the container body and lid as a result of the system and the dome-like design, at least the inner surface of the lid is stress-induced Corrosion in the weld seam is avoided.
  • the weld seam essentially only has to act as a sealing seam, since transport forces acting on the cover are absorbed by the positive engagement or shrink engagement.
  • the welded connection be it as an external weld seam or internal diffusion welded connection, contributes in a targeted manner to corrosion protection and / or to fastening the cover.
  • the shrink engagement increases the corrosion resistance, so that the axial length of the weld seam 17 can possibly be reduced to a corresponding extent.
  • welding chosen in the claims and in the description also includes soldering, unless explicit reference is made to "diffusion welding".
  • An annular surface 1d is formed between the container bottom 1a and the casing 1b (see FIG. 1), which corresponds to the annular end face of the opening area 1c and thus enables the containers to be stacked.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Closures For Containers (AREA)
EP85108580A 1984-07-24 1985-07-10 Verfahren zum Schliessen eines Behälters zur Aufnahme von radioaktivem Material und Behälter zur Durchführung des Verfahrens Expired - Lifetime EP0169440B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85108580T ATE69119T1 (de) 1984-07-24 1985-07-10 Verfahren zum schliessen eines behaelters zur aufnahme von radioaktivem material und behaelter zur durchfuehrung des verfahrens.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3427179 1984-07-24
DE3427179 1984-07-24
DE3503641 1985-02-04
DE19853503641 DE3503641A1 (de) 1984-07-24 1985-02-04 Verfahren zum schliessen eines behaelters zur aufnahme von radioaktivem material und behaelter zur durchfuehrung des verfahrens

Publications (3)

Publication Number Publication Date
EP0169440A2 EP0169440A2 (de) 1986-01-29
EP0169440A3 EP0169440A3 (en) 1987-10-07
EP0169440B1 true EP0169440B1 (de) 1991-10-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108580A Expired - Lifetime EP0169440B1 (de) 1984-07-24 1985-07-10 Verfahren zum Schliessen eines Behälters zur Aufnahme von radioaktivem Material und Behälter zur Durchführung des Verfahrens

Country Status (4)

Country Link
US (1) US4738388A (enrdf_load_stackoverflow)
EP (1) EP0169440B1 (enrdf_load_stackoverflow)
CA (1) CA1246247A (enrdf_load_stackoverflow)
DE (2) DE3503641A1 (enrdf_load_stackoverflow)

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DE3632270A1 (de) * 1986-09-23 1988-04-07 Wiederaufarbeitung Von Kernbre Verfahren und vorrichtung zum beladen und verschliessen eines doppelbehaeltersystems fuer die lagerung von radioaktivem material sowie verschluss fuer das doppelbehaeltersystem
DE3639653A1 (de) * 1986-11-29 1988-06-23 Wiederaufarbeitung Von Kernbre Deckelverschluss fuer den aeusseren abschirmbehaelter eines doppelbehaeltersystems zum transport und zur lagerung von radioaktiven abfaellen
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US5777343A (en) * 1996-05-08 1998-07-07 The Columbiana Boiler Company Uranium hexafluoride carrier
US5995573A (en) * 1996-09-18 1999-11-30 Murray, Jr.; Holt A. Dry storage arrangement for spent nuclear fuel containers
SE514082C2 (sv) 1999-04-26 2000-12-18 Hans Georgii Anordning för förvaring av riskmaterial och sätt att innesluta riskmaterial i en betongbehållarkropp
FR2818790B1 (fr) * 2000-12-21 2003-03-21 Transnucleaire Dispositif de conditionnement, pour le transport en vrac de matieres fissiles uraniferes
JP4064646B2 (ja) * 2001-06-29 2008-03-19 三菱重工業株式会社 放射性物質の密閉容器、密閉容器の密閉溶接方法、および密閉溶接方法に用いる排気装置
US6587536B1 (en) * 2002-03-18 2003-07-01 Holtec International, Inc. Method and apparatus for maximizing radiation shielding during cask transfer procedures
US20040020919A1 (en) * 2002-08-02 2004-02-05 Takashi Hirano Container and welding method therefor
DE60336743D1 (de) 2002-10-17 2011-05-26 Mallinckrodt Inc Vorrichtung zum transport von flüssigen radiopharmazeutika und die damit verbundene anwendungs- und herstellungsmethode
USD488864S1 (en) 2002-11-06 2004-04-20 Mallinckrodt Inc. Radioactive container
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AT6677U1 (de) * 2003-03-31 2004-02-25 Magna Steyr Fahrzeugtechnik Ag Verfahren zum verschweissen eines rotationssymmetrischen teiles mit einem nabenteil
US6812475B1 (en) * 2004-02-02 2004-11-02 Roger C. P. Huang Device for storing radioactive material and shipping apparatus for the same
DE602005026702D1 (de) * 2004-12-30 2011-04-14 Danfoss As Laserschweissverfahren
WO2008079439A2 (en) * 2006-07-10 2008-07-03 Holtec International, Inc. Apparatus, system and method for facilitating transfer of high level radioactive waste to and/or from a pool
US7786456B2 (en) 2006-10-11 2010-08-31 Holtec International, Inc. Apparatus for providing additional radiation shielding to a container holding radioactive materials, and method of using the same to handle and/or process radioactive materials
US8995604B2 (en) 2009-11-05 2015-03-31 Holtec International, Inc. System, method and apparatus for providing additional radiation shielding to high level radioactive materials
WO2013055445A2 (en) * 2011-08-19 2013-04-18 Holtec International, Inc. Container and system for handling damaged nuclear fuel, and method of making the same
US11515054B2 (en) 2011-08-19 2022-11-29 Holtec International Method of retrofitting a spent nuclear fuel storage system
US9233776B2 (en) 2012-06-07 2016-01-12 Bayer Healthcare Llc Molecular imaging vial transport container and fluid injection system interface
US9327886B2 (en) * 2013-03-13 2016-05-03 Bayer Healthcare Llc Vial container with collar cap
US9757306B2 (en) 2013-03-13 2017-09-12 Bayer Healthcare Llc Vial container with collar cap
CN105195860B (zh) * 2015-09-17 2018-09-07 中建钢构有限公司 阴面对接斜立焊接方法

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EP0141967A1 (de) * 1983-09-24 1985-05-22 STEAG Kernenergie GmbH Verfahren zum Schliessen eines Behälters für die Lagerung radioaktiver Substanzen

Also Published As

Publication number Publication date
CA1246247A (en) 1988-12-06
DE3503641A1 (de) 1986-02-06
EP0169440A3 (en) 1987-10-07
EP0169440A2 (de) 1986-01-29
DE3503641C2 (enrdf_load_stackoverflow) 1987-08-20
US4738388A (en) 1988-04-19
DE3584545D1 (de) 1991-12-05

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