EP0742561A1 - Gusseisen-Behälter mit einem durch Spritzen von schmelzflüssigen Blei versiegelte Deckel und Verfahren zum Versiegeln des Deckels auf dem Behälter - Google Patents

Gusseisen-Behälter mit einem durch Spritzen von schmelzflüssigen Blei versiegelte Deckel und Verfahren zum Versiegeln des Deckels auf dem Behälter Download PDF

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Publication number
EP0742561A1
EP0742561A1 EP96400985A EP96400985A EP0742561A1 EP 0742561 A1 EP0742561 A1 EP 0742561A1 EP 96400985 A EP96400985 A EP 96400985A EP 96400985 A EP96400985 A EP 96400985A EP 0742561 A1 EP0742561 A1 EP 0742561A1
Authority
EP
European Patent Office
Prior art keywords
container
cover
cast iron
groove
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Withdrawn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
EP96400985A
Other languages
English (en)
French (fr)
Inventor
Jacques Peulve
Jean-Paul Becue
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.)
AFE ENVIRONNEMENT
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
AFE ENVIRONNEMENT
Commissariat a lEnergie Atomique CEA
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 AFE ENVIRONNEMENT, Commissariat a lEnergie Atomique CEA filed Critical AFE ENVIRONNEMENT
Publication of EP0742561A1 publication Critical patent/EP0742561A1/de
Withdrawn legal-status Critical Current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 cast iron container and its lid sealed together by projection of molten lead; it further relates to the method for carrying out this sealing of the cover on the container.
  • the invention finds applications in the field of treatment and conditioning of waste and, more particularly, contaminated or nuclear waste.
  • This cast iron can be used, for example, to make containers intended to contain irradiating waste. These cast iron containers therefore have the double advantage, on the one hand, of being made from recycled metal and, on the other hand, of allowing the packaging of waste which is not recyclable.
  • the object of the invention is precisely to remedy the drawbacks mentioned above.
  • the invention relates to a cast iron container intended to contain waste, on which is placed a cover, the cover and the container each comprising a metal envelope filled with cast iron, characterized in that the cover and the container are separated, over part of the height of the cover, by a lead-filled groove produced by machining the metal casing and the cast iron part of the container and the cover.
  • the container has an inner wall inclined relative to the vertical, towards the top of the cover forming an acute angle ⁇ .
  • the lid of said container comprises at least one inclined wall e forming with the wall b of the container, an acute angle ⁇ ensuring the adhesion of lead between the walls of the lid and of the container. It also includes several different inclination planes ensuring better adhesion of lead to the wall.
  • the lead is in the form of wire.
  • the container prior to step a), is placed on a turntable, driven by a motor to ensure regular deposition of the lead wire.
  • the cleaning of dust and noxious elements is carried out by spraying a jet of compressed air into the groove then suctioning of this dust and noxious elements.
  • FIG 1 there is shown schematically the device for sealing the cover on the container.
  • This assembly 1 comprises the container itself, referenced 2, and the cover 4, both made of cast iron.
  • This cover 4 is placed on the container 2 and has a gripping hook 6 which allows it to be lifted to be placed on the container 2. According to the invention, this hook 6 is removable and can be removed when the cover is in square.
  • the container / cover assembly 1 is then placed on a turntable 8 which is driven by a motor (not shown in the figure for the sake of simplification of the figure) so as to effect a regular rotational movement.
  • This turntable can be, for example, a positioner as used in the field of welding.
  • the container 2 and its cover 4 are subjected to a rotational movement relative to the sealing means 10 of the cover on the container.
  • These sealing means 10 consist of a spray gun 12 and a system for cleaning dust and harmful elements 14.
  • the container 2 is separated from the cover 4 by a groove 3 in which it is sought to project the lead wire so as to seal the cover 4 with lead. container 2.
  • a cleaning system 14 is used to remove any dust and noxious elements which would be present in this groove 3.
  • the cleaning system 14 therefore comprises a hose air supply 14a which provides a projection of compressed air inside the groove 3 to bring out all the dust and all the foreign bodies which may be there.
  • a suction hood 14b sucks the dust and foreign bodies which have flown away under the effect of the pressure of the compressed air jet.
  • the lead wire can then be deposited there by means of the projection gun 12.
  • This gun 12 comprises a lead projection nozzle 12a, a supply of lead wire 12b and the supply pipes in fluid 12c.
  • the lead wire 12b has a diameter of approximately 3 mm.
  • a device which would project a lead wire at a rate of 7.5 m / min would make it possible to project approximately 36 kg of lead in 1 hour.
  • the lead spray gun is oriented at an angle of about 9 ° relative to the vertical, so that the jet of lead covers the bottom of the groove 3.
  • the spray gun is oriented by means of a robotic arm 16.
  • Such a lead spray gun is already known and used in the nuclear field, for example for coating glove boxes or for coating accelerator chambers or even for covering elements emitting significant radiation; for example, this gun is used to eliminate a source of irradiation which is too large to allow the source to be blocked by human action.
  • This projection gun which makes it possible to implement the technique of thermal projection of lead will therefore not be described in more detail since it is already known.
  • FIG 2 there is shown the detail of the groove 3 located between the cover 4 and the container 2.
  • the container 2 is made by means of an envelope 2a, which can be, for example, steel and which is filled with cast iron obtained from recycled metallic materials.
  • the cast iron part of container 2 has been referenced 2b.
  • the cover 4 is produced by means of a casing 4a, for example of steel, filled with cast iron 4b.
  • the groove 3 was obtained between the cover 4 and the container 2 following machining of the cover and the container. It is filled with lead 12b represented by speckles in FIG. 3.
  • the container 2 has in fact been machined so as to have a relatively deep groove on the bottom (a) of which the cover comes to rest, at least in part. 4. More precisely, the cast iron part of the container 2 has been machined so as to have a horizontal surface (a) which constitutes the bottom of the groove 3.
  • the inner wall of the container 2, referenced b has been machined from so as to form an angle of about 2 ° to 5 ° from the vertical, closed towards the opening of the groove 3 (i.e. the surface of the groove).
  • this wall b forms with respect to the vertical is referenced ⁇ .
  • the inclination of this wall b made of cast iron allows, when the groove 3 is filled with lead, to ensure that the lead flow cannot come out of the groove.
  • the steel casing 2a of the container 2 is machined on its surface, at the edge of the groove 3, so as to form with respect to the vertical an angle of around 45 °. This angle is referenced ⁇ and the edge of the envelope 2a bordering the groove 3 is referenced c.
  • this wall has also been machined so as to comprise several inclined planes, of different inclinations.
  • the side d produced in the casing 4a and partly in the cast iron 4b of the cover 4 forms, with respect to the vertical, an angle ⁇ of about 15 °, open towards the surface of the groove 3.
  • the side e of the cover is machined so as to be substantially vertical in order to produce an angle between 2 and 5 ° with side b.
  • This angle, between side e and side b, is an acute angle, referenced ⁇ . It ensures a retention of the lead bead between the container 2 and its cover 4 by producing a "jamming" effect in the event of the cover being torn off, in other words, in the case where the cover 4 is subjected to a tensile force.
  • the lead sealing bead thus produced therefore has a substantially frustoconical section.
  • the side f of the cover 4 is machined in an inclined manner and forms, with respect to the vertical, an angle ⁇ of approximately 45 °, closed towards the bottom (a) of the groove 3.
  • the side g adjacent to the side f and opening out on the bottom (a) of the groove 3 is machined so as to be generally inclined at an angle ⁇ , relative to the vertical. This angle ⁇ , closed towards the bottom (a) of the groove 3, is approximately 15 °.
  • the height of the groove 3 from its surface s to its bottom a is at most 116 mm.
  • the cover 4 further comprises, at its lower base, a machining operation which substantially forms a right angle between the side h and the side i of the cover 4. This machining allows the cover to be able to be introduced along the interior wall of the container 2, while by being supported, by its side g, on the bottom (a) of the groove 3.
  • the container 2 can also include an additional machining on its internal wall, forming the side j and allowing the side i of the cover 4 to fit along the side j of the container 2.
  • the cover 4 can be inserted very easily inside the container 2; the side h of the protrusion 4c of the cover rests on the bottom (a) of the groove 3; the side i of the cover which forms the right angle with the side g ensures the centering of the cover along the side j of the inner wall of the container.
  • the different planes of the walls of the cover 4 and of the container 2 ensure good adhesion of the lead and allow easier introduction of the spray gun and the cleaning system.
  • the side wall of the cover and the interior wall of the container are rough so as to allow even better adhesion of the lead.
  • the block 110 represents the fitting of the cover 4 on the container 2. This fitting of the cover is done by means of the gripping hook 6 shown in FIG. 1.
  • the cover is centered in the opening of the container. Preferably, the accuracy of the centering of the groove is less than 1mm.
  • the container-lid assembly is deposited on the turntable during a step 120.
  • Block 130 represents the step of setting up the sealing means, that is to say setting up the spray gun, as well as the extractor hood, the air jet projection pipe. tablet, etc. All the elements constituting the sealing means are placed in the most suitable position for sealing the lid on the container.
  • Block 140 represents the step of rotating the turntable on which the container and its cover has been placed.
  • Block 150 represents the operation for cleaning dust and noxious elements which would have remained in the groove 3. More specifically, this cleaning consists in blowing in the groove a jet of compressed air to remove all the cast iron dust, the abrasive elements and all foreign bodies which could adversely affect the good adhesion of lead to the walls of the groove. More specifically, the air nozzle which provides this projection of compressed air is placed inside the groove at a height of approximately 70 mm relative to the bottom of the groove.
  • the position of the spray gun is refined and the wire and fluid supply of the gun is checked.
  • the fluids which supply the gun 12 are oxygen, acetylene and compressed air.
  • oxygen can be at a flow rate of 1,500 l / h
  • acetylene has a flow rate of 750 l / h
  • compressed air at a flow rate of 30 m 3 / h.
  • This block 160 represents the step of projecting the lead which therefore comprises a sub-step of positioning the gun in the groove at a height of approximately 75 mm by relative to the bottom of the groove and at an angle of about 9 ° to the vertical so that the jet of lead sent by the gun covers the bottom of the groove.
  • the adjustment of the gun must be refined so that the jet of lead is well centered so that a minimum of lead is deposited on the walls of the groove.
  • the shooting distance is between 70 and 100 mm. This is done in periodically lifting the gun.
  • a check is also carried out during the operation to check whether the whole operation is being carried out continuously since any untimely stopping could hinder a good sealing of the lid on the container.
  • the stops necessary for checking and for changing the bobbins of lead wire are as short as possible; in addition, a mechanical densification of the lead is carried out during the process, by knurling.
  • the block 170 therefore represents a test step during which it is checked whether the filling of the groove is finished and carried out correctly. If not, step 160 is repeated until the groove is completely and correctly filled. On the contrary, if this is the case, the projection of lead is stopped, as well as the rotation of the turntable. This is represented by block 180.
  • the adhesion of lead to the walls of the groove can be further improved if these walls are rough. Also, to make the different sides of the cover 4 and of the container 2 even more adherent, it is possible to strip these walls by means of an abrasive jet to make them rough.
  • the abrasive dust which remains inside the groove after the walls have been stripped off, is cleaned either by blowing with a jet of compressed air, or by suction. According to the preferred embodiment and described in FIG. 1, the groove 3 is cleaned both by blowing a jet of compressed air and both by suction of the dust propelled by the air jet. This step has not been shown in the diagram of FIG. 3, because it can be carried out either between steps 120 and 130, or at the time of machining of the container and its cover.
  • the quality of the lead seal can be checked by infrared thermography measurements.
  • This quality control consists in checking the absence of internal cracks or detachment at the seal / cover interface or at the seal / container interface. More specifically, the control technique consists in transmitting a heat flux to a so-called "hot" source, which is the cover or the container (depending on the case) and observing the propagation of this heat up to the cold source, namely respectively the container or the lid, via the lead seal.
  • the seal adheres perfectly to the interface on the cover and container side, then the heat propagates homogeneously from the hot source to the cold source and the thermal image obtained by infrared camera is then perfectly uniform.
  • the infrared image is characterized by a dark trace in the middle of the assembly. with a clear surface.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Processing Of Solid Wastes (AREA)
  • Cleaning In General (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
EP96400985A 1995-05-11 1996-05-09 Gusseisen-Behälter mit einem durch Spritzen von schmelzflüssigen Blei versiegelte Deckel und Verfahren zum Versiegeln des Deckels auf dem Behälter Withdrawn EP0742561A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9505583 1995-05-11
FR9505583A FR2733966B1 (fr) 1995-05-11 1995-05-11 Conteneur en fonte avec couvercle scelle par projection de plomb fondu et procede de scellement du couvercle sur le conteneur

Publications (1)

Publication Number Publication Date
EP0742561A1 true EP0742561A1 (de) 1996-11-13

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EP96400985A Withdrawn EP0742561A1 (de) 1995-05-11 1996-05-09 Gusseisen-Behälter mit einem durch Spritzen von schmelzflüssigen Blei versiegelte Deckel und Verfahren zum Versiegeln des Deckels auf dem Behälter

Country Status (3)

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US (1) US5787688A (de)
EP (1) EP0742561A1 (de)
FR (1) FR2733966B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
FR2845196B1 (fr) * 2002-10-01 2004-12-03 Commissariat Energie Atomique Conteneur pour matieres radioactives et procede de fermeture d'un tel conteneur
FR2855649B1 (fr) * 2003-05-27 2014-04-25 Commissariat Energie Atomique Element creux en fonte destine a etre assemble de facon etanche a un corps annexe, procede de fabrication d'un tel element et conteneur pour matieres radioactives.
WO2013127894A1 (de) * 2012-03-02 2013-09-06 Areva Gmbh Verfahren und vorrichtung zur kapselung eines brennstabes oder eines brennstababschnittes für eine zwischenlagerung

Citations (8)

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GB1250852A (de) * 1969-07-26 1971-10-20
SU450951A1 (ru) * 1973-01-23 1974-11-25 Ордена Трудового Красного Знамени Центральный Научно-Исследовательский Институт Технологии Судостроения Способ закреплени труб в отверсти х трубной решетки теплообменного аппарата
EP0042882A1 (de) * 1980-06-28 1982-01-06 Deutsche Gesellschaft für Wiederaufarbeitung von Kernbrennstoffen mbH Vorrichtung für die Aufnahme, den Transport und die Endlagerung von abgebrannten Reaktorbrennelementen
DE3405735A1 (de) * 1984-02-17 1985-08-29 Steag Kernenergie Gmbh, 4300 Essen Verfahren zum verschliessen eines metallischen behaelters zum transport und/oder langzeitlagerung von radioaktiven stoffen und nach dem verfahren geschlossener behaelter
DE3405733A1 (de) * 1984-02-17 1985-08-29 Steag Kernenergie Gmbh, 4300 Essen Verfahren zum verschliessen eines metallischen behaelters zum transport und/oder langzeitlagerung von radioaktiven stoffen und nach dem verfahren geschlossener behaelter
DE3503377A1 (de) * 1985-02-01 1986-09-18 Kernforschungsanlage Jülich GmbH, 5170 Jülich Aus bausteinen zusammengesetzte abschirm- oder behaelterwand und verfahren zur herstellung
RU1718671C (ru) * 1990-03-16 1993-11-30 Московское научно-производственное объединение "Радон" Способ захоронени твердых высокоактивных отходов в геологических формаци х
FR2709291A1 (fr) * 1993-08-27 1995-03-03 Electricite De France Conteneur de stockage pour déchets toxiques à fermeture étanche et son procédé de fabrication.

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BE790698A (fr) * 1971-11-02 1973-04-27 Metallurg De Douarnenez Soc Procede d'assemblage d'une boite metallique au moyen d'une bande rapportee soudee
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Publication number Priority date Publication date Assignee Title
GB1250852A (de) * 1969-07-26 1971-10-20
SU450951A1 (ru) * 1973-01-23 1974-11-25 Ордена Трудового Красного Знамени Центральный Научно-Исследовательский Институт Технологии Судостроения Способ закреплени труб в отверсти х трубной решетки теплообменного аппарата
EP0042882A1 (de) * 1980-06-28 1982-01-06 Deutsche Gesellschaft für Wiederaufarbeitung von Kernbrennstoffen mbH Vorrichtung für die Aufnahme, den Transport und die Endlagerung von abgebrannten Reaktorbrennelementen
DE3405735A1 (de) * 1984-02-17 1985-08-29 Steag Kernenergie Gmbh, 4300 Essen Verfahren zum verschliessen eines metallischen behaelters zum transport und/oder langzeitlagerung von radioaktiven stoffen und nach dem verfahren geschlossener behaelter
DE3405733A1 (de) * 1984-02-17 1985-08-29 Steag Kernenergie Gmbh, 4300 Essen Verfahren zum verschliessen eines metallischen behaelters zum transport und/oder langzeitlagerung von radioaktiven stoffen und nach dem verfahren geschlossener behaelter
DE3503377A1 (de) * 1985-02-01 1986-09-18 Kernforschungsanlage Jülich GmbH, 5170 Jülich Aus bausteinen zusammengesetzte abschirm- oder behaelterwand und verfahren zur herstellung
RU1718671C (ru) * 1990-03-16 1993-11-30 Московское научно-производственное объединение "Радон" Способ захоронени твердых высокоактивных отходов в геологических формаци х
FR2709291A1 (fr) * 1993-08-27 1995-03-03 Electricite De France Conteneur de stockage pour déchets toxiques à fermeture étanche et son procédé de fabrication.

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DATABASE WPI Week 7534, Derwent World Patents Index; AN 75-56680W, XP002011078 *
DATABASE WPI Week 9410, Derwent World Patents Index; AN 94-081543, XP002011077 *

Also Published As

Publication number Publication date
FR2733966B1 (fr) 1997-06-13
US5787688A (en) 1998-08-04
FR2733966A1 (fr) 1996-11-15

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