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WO1997039457A1 - Fut metallique pour loger des crayons de combustible nucleaire - Google Patents

Fut metallique pour loger des crayons de combustible nucleaire Download PDF

Info

Publication number
WO1997039457A1
WO1997039457A1 PCT/EP1997/001812 EP9701812W WO9739457A1 WO 1997039457 A1 WO1997039457 A1 WO 1997039457A1 EP 9701812 W EP9701812 W EP 9701812W WO 9739457 A1 WO9739457 A1 WO 9739457A1
Authority
WO
WIPO (PCT)
Prior art keywords
canister
wall
opening
fuel
tube
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.)
Ceased
Application number
PCT/EP1997/001812
Other languages
German (de)
English (en)
Inventor
Wilfried Jung
Volker Dannert
Martin Peehs
Peter Rau
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO1997039457A1 publication Critical patent/WO1997039457A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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

  • a canister for receiving spent nuclear reactor fuel elements is known from DOE / RW-0476, "OCRWM Bulletin", summer 1995, in particular pages 1 to 3 and 15.
  • This canister is hollow-cylindrical in shape, has a canister base at one end and the other end a canister opening in which a shielding plate is arranged The canister opening is closed with a plate-shaped inner cover covering the shielding plate and with an outer cover covering this inner cover
  • the canister with the nuclear reactor fuel elements located in the basket can be inserted into a barrel-shaped transfer container and in this transfer container to an intermediate storage facility with concrete shielding for the canister and away from this interim storage facility be transported.
  • the canister can also be deposited with the spent nuclear fuel in a geological repository.
  • the basket with the nuclear reactor separation elements in the canister must ultimately be supported on the lids with which this canister is closed.
  • the lid of the canister In the event of accelerations or decelerations which the known canister experiences during transportation, the lid of the canister is therefore exposed to mechanical stresses which, under certain circumstances, can only be absorbed if the canister and the lid for closing this canister are proportionate are thick-walled.
  • the object of the invention is to remedy this and, in particular, to make the canister thin-walled.
  • the wall of this canister is accelerated or decelerated by a nuclear reactor fuel element located in the canister only under tension in the longitudinal direction of the wall, but not under pressure transverse to this longitudinal direction, so that this wall can be made relatively thin.
  • a lid of the canister can not only be relatively thin-walled, but the connection between such a lid and the wall essentially only has the function of a gas-impermeable seal, since the lid also has a nuclear reactor fuel element located in the interior of the canister do not exert any force on the lid when accelerating or decelerating the canister.
  • At least one tube can be provided which is led from the canister bottom to the chamber opening in the interior of the canister and which loosely engages through the holding plate.
  • a pipe can be used to suck water from the interior of the open canister.
  • Such a tube can, however, also be used to blow a gas, in particular air, over the bottom of the interior of the canister in order to dry and possibly also cool the interior and a nuclear reactor fuel element located in this interior after the water has been drawn off.
  • the canister wall between the latching point and the chamber opening is frustoconically widened towards the canister opening, so that the cover can be seated without play.
  • FIG. 1 shows a canister according to the invention in longitudinal section
  • FIG. 2 also shows a longitudinal section of a fuel assembly pool with a canister according to FIG. 1 and a device for closing this canister with a lid;
  • FIG. 3 shows a longitudinal section of a transport and storage container for several canisters according to FIG. 1.
  • the canister 1 has a hollow-cylindrical can wall 2 and an outwardly curved canister bottom 3 at the lower end.
  • the canister wall 2 forms an inwardly open, surrounding bead 4, which is located in a plane perpendicular to the longitudinal axis 5 of the canister. Between this bead 4 and a canister opening 6 at the upper end of the canister, the canister wall 2 widens towards the container opening 6 in the form of a frustoconical wall part 2a.
  • a canister lid 7 is inserted into the canister opening 6.
  • This canister lid 7 is deep-drawn to form a frustoconical collar 8.
  • the frustoconical collar 8 fits snugly against the inside of the frustoconically widening canister wall between the bead 4 and the canister opening 6 at the upper end of the canister.
  • the edge of the frustoconical collar 8 ends with the canister opening 6.
  • the truncated cone-like collar 8 of the canister cover 7 is fixed to the inside of the truncated cone-like extension 2a of the canister wall 2 via two mutually spaced, mutually parallel, gas-tight circumferential weld seams 2b and 2c. welded.
  • a hollow cylinder-shaped attack body 9 for handling the canister cover 7.
  • the fuel element base 11 of a nuclear reactor fuel element 10 In the interior of the canister, on the canister base 3, there is an annular base 9 made of stainless steel, in whose ring opening facing the upper end of the canister is inserted the fuel element base 11 of a nuclear reactor fuel element 10, which has a square cross section.
  • this nuclear reactor fuel element 10 has a fuel element head 12 with a square cross section and fuel rod 13 and control rod guide tubes 14. Each control rod guide tube 14 is screwed at its lower end to the fuel assembly base 11 and with its upper end to the fuel assembly head 12.
  • the fuel assembly 11 with the fuel rods 13 and a lower part of the fuel assembly 12 are enclosed by two angle plates 15, which stand together with the nuclear reactor fuel element 10 on the base 9 within the interior of the canister and whose bending edges are parallel to the longitudinal axis 5 of the canister.
  • the angle plates 15 form the wall of a channel with a square cross-section, on the upper edges of which face the opening 6 of the canister, the angle plates 15 are inclined outwards and thus form a kind of funnel 16 as an aid in the insertion of the nuclear reactor fuel element 10 into the canister .
  • the fuel assembly head 12 has hold-down springs 17. These are helical springs with a spring axis 18 parallel to the longitudinal axis of the nuclear reactor fuel element 10 and thus also to the longitudinal axis 5 of the canister limited.
  • a holding plate 19 compresses the coil springs 17 and braces itself against a snap ring (C-Rmg) 20 m in the direction of the opening 6 of the canister.
  • This snap ring (C-Rmg) 20 is a locking element for the holding plate 19, which is blown into the circumferential bead 4 on the inside of the canister wall 2, ie locked with this canister wall
  • two pipes 21 and 22 are led from the canister bottom 3 to the canister opening 6 and covered by the chamber lid 7. Both tubes 21 and 22 pass loosely through the holding plate 19. While the tube 21 with the smaller inside and outside diameter is led through the base 9 and mounts at the deepest point of the canister bottom 3, which is curved outwards, the tube 22 with a larger inside and outside diameter is also through the base 9 led, but it ends above the canister bottom 3 in the annular space of the base 9.
  • a vertical support column 24 is located in a fuel element pool 23 filled with water.
  • This support column 24 carries two superposed arms 25, which belong to a cooker 26.
  • a canister corresponding to FIG. 1 without a cover 7 and without a holding plate 19 with a vertical longitudinal axis 5 was first inserted into this cooker 26 under water with the aid of a lifting device. Then, using the lifting device, a nuclear reactor fuel element 10 with burnt-out fuel rods 13 was also inserted into the canister through the canister opening 6. The holding plate 19 was then placed on the hold-down springs 17 and pressed under compression of the hold-down springs 17 on the fuel assembly head 12 until the C-Rmg 20 could be blasted into the bead 4. A watertight hood 28 was then placed on an outer flange of the quiver 26 by means of guide bolts 29 located on the outer flange 27.
  • a U-tube is connected.
  • Fig. 2 only the U-tube 30 for the tube 22 is shown, but not the U-tube for the tube 21.
  • Such a U-tube 30 is pivoted with its other end about a pivot axis perpendicular to the longitudinal axis of the tube 22 attached bar in the hood 28 and shown in dashed lines in semer starting position in Fig. 2. From this starting position, the U-tube 30 is pivoted about the pivot axis at one end until the other end is docked at the upper end of the tube 22.
  • the U-tube 30 is then pivoted back into the position shown in dashed lines in FIG. 2, as is the U-tube, not shown, connected to the tube 21.
  • the cap 7 assigned to the canister in the cooker 26 hangs with its base 9 on a piston rod 31, the piston of which is arranged inside the bell 28 and can be raised and lowered by correspondingly loading the cylinder 32 with compressed air.
  • the frustoconical collar 8 of the canister cover 7 is welded to the frustoconical wall part 2a of the canister wall 2 with the aid of a welding device 33.
  • This welding device 33 is displaceable on a jacket lime or bevel 34 which is parallel to the jacket line of the frustoconical wall part 2a of the canister wall 2, with which this jacket line or bevel lies in each case in the same plane.
  • the bevel 34 itself sits on the outside of a hollow cylinder 35, which is placed over a hollow-cylindrical support base 36 inside the hood 28 and its longitudinal axis with the longitudinal axis of the hollow cylinder 35, with the longitudinal axis of the piston rod 31 and with the longitudinal axis of the cooker 26 and the m the canister arranged in the cooker 26 coincides.
  • An inner cover 42 is then screwed tightly into the opening of the transport container 41 using screw bolts, not shown. Then an outer cover 43 is placed on the opening of the transport container 41 and likewise screwed tight with screw bolts, not shown.
  • the decontaminated and closed transport container 41 with the canisters located in it can now be stored in an interim storage facility until the radioactivity and the resulting heat emission from the spent nuclear reactor fuel element stored in the canisters have subsided to such an extent that the canisters come out of the transport container 41 can be removed and used unopened, for example in gesture formats of a repository.
  • the canisters are much easier to handle than spent nuclear reactor fuel elements as such and as the transport container 41.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)

Abstract

L'invention concerne un fût métallique à fine paroi destinée à recevoir des crayons de combustible, qui comprend sur son fond (3) un socle (9) prévu pour poser les extrémités inférieures des crayons de combustible. En outre, il est prévu une plaque de retenue (19) pour serrer les extrémités supérieures des crayons de combustible, à laquelle est associé un élément d'arrêt pouvant s'engager en un point approprié sur la face intérieure de la paroi (2) du fût métallique. Lorsqu'elle est en position de verrouillage, la plaque de retenue (19) est soutenue dans le sens de l'ouverture du fût métallique.
PCT/EP1997/001812 1996-04-12 1997-04-11 Fut metallique pour loger des crayons de combustible nucleaire Ceased WO1997039457A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19614547 1996-04-12
DE19614547.3 1996-04-12

Publications (1)

Publication Number Publication Date
WO1997039457A1 true WO1997039457A1 (fr) 1997-10-23

Family

ID=7791126

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/001812 Ceased WO1997039457A1 (fr) 1996-04-12 1997-04-11 Fut metallique pour loger des crayons de combustible nucleaire

Country Status (1)

Country Link
WO (1) WO1997039457A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1503385A1 (fr) * 2003-08-01 2005-02-02 GNB Gesellschaft für Nuklear-Behälter mbH Conteneur de transport et/ou de stockage
RU2324241C1 (ru) * 2006-08-21 2008-05-10 Открытое акционерное общество "Конструкторское бюро специального машиностроения" Контейнер для транспортировки и/или хранения отработавшего ядерного топлива
CN108831577A (zh) * 2018-05-17 2018-11-16 中国核电工程有限公司 一种转运容器自动化开启、关闭和锁定机构
FR3088474A1 (fr) * 2018-11-14 2020-05-15 Tn International Colis de matiere radioactive, comprenant un dispositif de calage axial a materiau a memoire de forme

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58121357A (ja) * 1982-01-13 1983-07-19 Teijin Ltd 筒状圧力容器の管板固定方法
DD217767A1 (de) * 1983-08-22 1985-01-23 Jochen Krauss Behaelter zum transportieren, autoklavieren und lagern stabfoermiger gegenstaende
EP0202521A1 (fr) * 1985-05-21 1986-11-26 ABB Reaktor GmbH Conteneur avec obturateur verrouillable
US4803042A (en) * 1987-11-23 1989-02-07 Westinghouse Electric Corp. Nuclear reactor core component shipping container
JPH01305398A (ja) * 1988-06-03 1989-12-08 Mitsubishi Heavy Ind Ltd 放射性物質輸送用キャスク
EP0407784A1 (fr) * 1989-07-14 1991-01-16 Noell GmbH Fermeture pour conteneur recevant des substances radioactives ou toxiques

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58121357A (ja) * 1982-01-13 1983-07-19 Teijin Ltd 筒状圧力容器の管板固定方法
DD217767A1 (de) * 1983-08-22 1985-01-23 Jochen Krauss Behaelter zum transportieren, autoklavieren und lagern stabfoermiger gegenstaende
EP0202521A1 (fr) * 1985-05-21 1986-11-26 ABB Reaktor GmbH Conteneur avec obturateur verrouillable
US4803042A (en) * 1987-11-23 1989-02-07 Westinghouse Electric Corp. Nuclear reactor core component shipping container
JPH01305398A (ja) * 1988-06-03 1989-12-08 Mitsubishi Heavy Ind Ltd 放射性物質輸送用キャスク
EP0407784A1 (fr) * 1989-07-14 1991-01-16 Noell GmbH Fermeture pour conteneur recevant des substances radioactives ou toxiques

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 227 (M - 248) 7 October 1983 (1983-10-07) *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 101 (P - 1012) 23 February 1990 (1990-02-23) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1503385A1 (fr) * 2003-08-01 2005-02-02 GNB Gesellschaft für Nuklear-Behälter mbH Conteneur de transport et/ou de stockage
RU2324241C1 (ru) * 2006-08-21 2008-05-10 Открытое акционерное общество "Конструкторское бюро специального машиностроения" Контейнер для транспортировки и/или хранения отработавшего ядерного топлива
CN108831577A (zh) * 2018-05-17 2018-11-16 中国核电工程有限公司 一种转运容器自动化开启、关闭和锁定机构
CN108831577B (zh) * 2018-05-17 2021-07-20 中国核电工程有限公司 一种转运容器自动化开启、关闭和锁定机构
FR3088474A1 (fr) * 2018-11-14 2020-05-15 Tn International Colis de matiere radioactive, comprenant un dispositif de calage axial a materiau a memoire de forme
EP3654351A1 (fr) * 2018-11-14 2020-05-20 TN International Colis de matiere radioactive, comprenant un dispositif de calage axial a materiau a mémoire de forme

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