EP0752150B1 - Emballage comprenant un corps en acier forge a section non circulaire pour assemblages combustibles nucleaires - Google Patents

Emballage comprenant un corps en acier forge a section non circulaire pour assemblages combustibles nucleaires Download PDF

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Publication number
EP0752150B1
EP0752150B1 EP94912571A EP94912571A EP0752150B1 EP 0752150 B1 EP0752150 B1 EP 0752150B1 EP 94912571 A EP94912571 A EP 94912571A EP 94912571 A EP94912571 A EP 94912571A EP 0752150 B1 EP0752150 B1 EP 0752150B1
Authority
EP
European Patent Office
Prior art keywords
section
wall
cavity
cylindrical body
crescent
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
EP94912571A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0752150A1 (fr
Inventor
Yves Brachet
Bernard Kirchner
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.)
Societe pour les Transports de lIndustrie Nucleaire Transnucleaire SA
Original Assignee
Societe pour les Transports de lIndustrie Nucleaire Transnucleaire SA
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9461568&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0752150(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Societe pour les Transports de lIndustrie Nucleaire Transnucleaire SA filed Critical Societe pour les Transports de lIndustrie Nucleaire Transnucleaire SA
Publication of EP0752150A1 publication Critical patent/EP0752150A1/fr
Application granted granted Critical
Publication of EP0752150B1 publication Critical patent/EP0752150B1/fr
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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
    • G21F5/005—Containers for solid radioactive wastes, e.g. for ultimate disposal
    • G21F5/008—Containers for fuel elements

Definitions

  • the invention relates to a packaging or transport or storage container. nuclear fuel assemblies, said packaging comprising a body forged metal, usually forged steel, defining a cavity in which are introduced the assemblies.
  • the invention also relates to the means of achieving it.
  • Nuclear fuel assemblies are generally shaped prismatic or cylindrical with often a square section (eg PWR, BWR, %), sometimes a hexagonal section (VVER, %), sometimes a section circular (CANDU, RBMK, ).
  • the weight of the packaging and its size must be limited to be compatible with the equipment of the installations to serve (reactors, intermediate storage facilities, reprocessing, means of transport).
  • a packaging having a cavity whose cross section has a shape adjusted to that of the assemblies combustible and having a shaped body such as side-by-side storage of several packages take up as little space as possible.
  • packaging having for example a cavity with circular cross-section for accommodating combustible assemblies with cross-section square is not entirely satisfactory.
  • packaging whose outer surface of the body has a circular cross section is not always satisfactory.
  • packaging metallic cast iron packaging (casting), multilayer packaging steel / steel (rolled-welded), lead packaging (lead cast between two rolled-welded steel enclosures), forged steel packaging (forged ferrule then machined by lathe).
  • GB 2 003 782 describes, for example, a transport container and storage of radioactive waste in cast iron or cast steel with non-section circular.
  • patent FR 2,563,652 describes an envelope comprising two steel walls of maximum thickness 4 mm between which is located a thin neutron absorber screen; the square shape of the envelope is obtained by plastic deformation of the steel walls.
  • the plaintiff sought to develop packaging having a gain in weight and size compared to the quantity of fuel assemblies housed there, while satisfying the shielding, thermal conductivity and mechanical strength conditions required.
  • the invention is a package for nuclear fuel assemblies comprising a thick cylindrical body of forged steel delimiting a cavity for accommodating said nuclear fuel assemblies therein, said cavity being able to be hermetically closed at its two ends by plugs also made of metal, characterized in that the straight section of the cylindrical body is non-circular.
  • the packaging according to the invention therefore has a metallic cylindrical body whose cross section is not circular.
  • said cross section has the appearance of a crown whose internal and external perimeters do not have the shape of a circle but generally contain segments of straight lines; the perimeters can for example have the shape of squares, or other regular, concentric polygons whose angles can be rounded.
  • These lunules have a cross section which is formed on the one hand by an arc of a circle of the same diameter as that of the interior wall of the cavity and on the other hand by a cord which underlies the arc of circle and which therefore corresponds to a flat part of the interior wall of the cavity.
  • the flats can be 2 - 4 or 6; the outer or inner perimeter of the crown then has the shape of a square or a rectangle when there are 4 flats, or a hexagon when there are 6 flats.
  • the thickness of the cylindrical metallic body with a straight cross section not circular according to the invention is sufficient in all respects to ensure a shielding according to specifications. It usually reaches several tens of centimeters.
  • the shape of the interior cavity can be adapted to the type fuel assemblies to be housed there. So when for example the assemblies have a square cross section, we preferably choose a cavity having a square or rectangular cross section with usually rounded corners; this allows to increase its coefficient filling (less dead space than in a section cavity circular).
  • the cavity located inside the metallic cylindrical body is generally closed at its two ends, one of them by a fixed bottom for example by welding with or without shrinking, the other by a cover removable.
  • the circular section starting ferrule which must be modified to succeed to the cylindrical body according to the invention is generally based on steel forge.
  • cylindrical body of the package according to the invention is of the same nature.
  • outer and inner walls of the forged steel shell have were lathe coaxially to give a first cylindrical body with circular section, the outer wall then having been rectified to obtain at least one flat over the entire height of the ferrule and preferably 2, 4 or 6 parallel flats two by two and also symmetrical two by two with respect to the axis of the body cylindrical.
  • the lunula are preferably 2, 4 or 6, all identical or not and their strings are parallel two by two and symmetrical also two by two with respect to the axis of the cylindrical body.
  • the inner wall of the ferrule and the lunules can be coated with a metallic deposit, for example an Al-Zn deposit carried out by schooping.
  • FIG. 1 illustrates a package according to the invention and shows the cross section.
  • FIG. 2 illustrates a detail of the method of fixing by screw of a lunula on the internal wall of the cylindrical body.
  • the cylindrical body of the package comprising the flats (5) and the lunulas (7) subtended by their parallel cords (9) to the flats (5), does have a non-circular cross section.
  • the dimensions of the flats and the lunules may vary and be adapted to the assemblies to be stored in the cavity 2, taking care however that the thicknesses of the cylindrical body 1 meet the shielding requirements and mechanical strength.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Stackable Containers (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Buffer Packaging (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
EP94912571A 1994-03-24 1994-03-30 Emballage comprenant un corps en acier forge a section non circulaire pour assemblages combustibles nucleaires Expired - Lifetime EP0752150B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9403723A FR2717945B1 (fr) 1994-03-24 1994-03-24 Emballage comprenant un corps en acier forgé à section non circulaire pour assemblages combustibles nucléaires.
FR9403723 1994-03-24
PCT/FR1994/000359 WO1995026029A1 (fr) 1994-03-24 1994-03-30 Emballage comprenant un corps en acier forge a section non circulaire pour assemblages combustibles nucleaires

Publications (2)

Publication Number Publication Date
EP0752150A1 EP0752150A1 (fr) 1997-01-08
EP0752150B1 true EP0752150B1 (fr) 1998-09-09

Family

ID=9461568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94912571A Expired - Lifetime EP0752150B1 (fr) 1994-03-24 1994-03-30 Emballage comprenant un corps en acier forge a section non circulaire pour assemblages combustibles nucleaires

Country Status (11)

Country Link
US (1) US5844245A (xx)
EP (1) EP0752150B1 (xx)
JP (1) JP3502100B2 (xx)
KR (1) KR100315717B1 (xx)
CZ (1) CZ274496A3 (xx)
DE (1) DE69413259T2 (xx)
ES (1) ES2122265T3 (xx)
FR (1) FR2717945B1 (xx)
TW (1) TW265448B (xx)
WO (1) WO1995026029A1 (xx)
ZA (1) ZA952420B (xx)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE507525C2 (sv) * 1996-10-15 1998-06-15 Gert Johansson Förfarande för framställning av avlånga kapslar för förvaring av utbrända kärnbränsleelement
US5949083A (en) * 1997-03-18 1999-09-07 Transnucleaire Container comprising a forged steel body of non-circular cross-section for nuclear fuel assemblies
JP3150669B2 (ja) 1999-09-02 2001-03-26 三菱重工業株式会社 キャスク
JP3150670B1 (ja) * 1999-09-09 2001-03-26 三菱重工業株式会社 キャスクおよびキャスクの製造方法、並びに埋没型
JP3600535B2 (ja) 2001-02-26 2004-12-15 三菱重工業株式会社 キャスク

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1521389A (fr) * 1967-01-16 1968-04-19 Tefal Sa Procédé de traitement et structure, à reliefs durs, de surfaces permettant la fixation de polytétrafluoréthylène
US3619616A (en) * 1969-01-24 1971-11-09 Gen Electric Forced air cooled radioactive materials container
US3731101A (en) * 1971-04-14 1973-05-01 Nl Industries Inc Shipping container for radioactive material
US3886368A (en) * 1973-02-27 1975-05-27 Nuclear Fuel Services Spent fuel shipping cask
US3962587A (en) * 1974-06-25 1976-06-08 Nuclear Fuel Services, Inc. Shipping cask for spent nuclear fuel assemblies
DE7727690U1 (de) * 1977-09-07 1977-12-22 Steag Kernenergie Gmbh, 4300 Essen Abschirmtransport- und/oder abschirmlagerbehaelter fuer radioaktive abfaelle
JPS60190568A (ja) * 1984-03-12 1985-09-28 Hitachi Cable Ltd 金属管材の内面処理方法
FR2563652B1 (fr) * 1984-04-25 1986-07-25 Bignier Schmid Laurent Procede de fabrication d'une enveloppe a double paroi contenant un ecran absorbeur de neutrons pour le transport et le stockage d'une matiere radioactive
KR920006059B1 (ko) * 1990-01-31 1992-07-27 한국중공업 주식회사 핵 폐기물 수송용기의 납주조 방법
FR2698205B1 (fr) * 1992-11-19 1995-02-03 Sgn Soc Gen Tech Nouvelle Cuve de stockage d'une solution active de matières fissiles.

Also Published As

Publication number Publication date
ES2122265T3 (es) 1998-12-16
US5844245A (en) 1998-12-01
JPH09510545A (ja) 1997-10-21
KR970700921A (ko) 1997-02-12
FR2717945A1 (fr) 1995-09-29
FR2717945B1 (fr) 1996-04-26
ZA952420B (en) 1996-01-16
TW265448B (xx) 1995-12-11
JP3502100B2 (ja) 2004-03-02
DE69413259D1 (de) 1998-10-15
CZ274496A3 (en) 1997-01-15
KR100315717B1 (ko) 2002-02-19
EP0752150A1 (fr) 1997-01-08
DE69413259T2 (de) 1999-04-08
WO1995026029A1 (fr) 1995-09-28

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