EP0742562B1 - Method for installing a sealed passage through a cell wall - Google Patents

Method for installing a sealed passage through a cell wall Download PDF

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Publication number
EP0742562B1
EP0742562B1 EP96401010A EP96401010A EP0742562B1 EP 0742562 B1 EP0742562 B1 EP 0742562B1 EP 96401010 A EP96401010 A EP 96401010A EP 96401010 A EP96401010 A EP 96401010A EP 0742562 B1 EP0742562 B1 EP 0742562B1
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EP
European Patent Office
Prior art keywords
cell
sleeve
wall
guide tube
interior
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Expired - Lifetime
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EP96401010A
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German (de)
French (fr)
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EP0742562A1 (en
Inventor
Jacques Martinez
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Commissariat a lEnergie Atomique CEA
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    • 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
    • G21F7/00—Shielded cells or rooms
    • G21F7/005—Shielded passages through walls; Locks; Transferring devices between rooms

Definitions

  • the invention relates to the installation of equipment in the wall of a waterproof cell used for work in high activity atmosphere for example for transfer waste or small tools irradiated through the wall, and in particular the establishment of a watertight crossing. This installation must be possible after commissioning of the cell, i.e. when the interior of the cell is already contaminated.
  • the cell has a wall inner, called “skin", made of stainless steel sheet. She has the function of confining the contaminated atmosphere of the cell and also to prevent outside air from entering it.
  • the technical problem which then arises is obtaining a very high level sealing between the installed equipment in the wall with the cell wall and in particular the skin.
  • the object of the invention is therefore to remedy this disadvantage by proposing another installation method of a waterproof crossing in the wall of a cell in which are carried out work with a high degree of contamination.
  • Ventilation from outside to inside of the cell is applied to the crossing to overcome possible leakage of contaminated air from the interior to outside the cell.
  • it includes a first seal placed in a groove on the outer surface of the guide tube and being in abutment against the internal surface of the sheath.
  • Figure 1 shows a cross section of the wall a cell whose interior is referenced 1 and the exterior is referenced 2.
  • the waterproof crossing according to the invention, is therefore placed so as to cross this wall 3.
  • a skin 4 covers the internal surface of the wall 3, on the side of inside 1 of the cell.
  • This skin 4 is a sheet of stainless steel covering the inner wall of the cell for high efficiency sealing.
  • sealing bell 5 is fixed on the skin 4 opposite the passage. This sealing bell 5 is placed before, when developing a passage through the wall 3 and the skin 4 of the cell, inside of it. She is fixed on the skin 4 opposite a passage.
  • the first main operation of the process according to the invention is the installation of a shaped sheath 6 tubular in the passage.
  • this passage has a inner diameter equal to the outer diameter of the sleeve 6.
  • the hole in which this sheath 6 is placed is widened by side of the outside 2 of the cell to be able to place there, around the sheath 6, biological protection 7 necessary for nuclear installations and consisting of balls of lead.
  • the sheath 6 On the interior side 1 of the cell, the sheath 6 is placed in abutment on the surface of the skin 4 which is facing wall 3.
  • the sleeve 6 On the exterior side 2 of the cell, the sleeve 6 is welded to a base plate 9 placed against the external face 8 of the wall 3. This base plate 9 allows also contain biological protection 7. It is moreover provided with two access holes 19 for the balls lead.
  • the sleeve 6 therefore makes it possible to provide a passage cylindrical through the wall 3 of the cell. We add that is better to perfectly adjust the perpendicularity of this sleeve 6 relative to the base plate 9 placed against the wall 3.
  • the mounting of the base plate 9 is done after the complete positioning and perpendicular adjustment of the sleeve 6 in the wall 3.
  • a fourth essential step in the process according to the invention consists in mounting in the sheath 6 a guide tube 11 whose outside diameter is slightly less than the inner diameter of the sleeve 6.
  • a flange 12 of annular shape and placed inside the sheath 6, but outside of this guide tube 11. It therefore ensures concentricity between these two elements tubes that are the sleeve 6 and the guide tube 11. It is then welded to the latter and also fixed to the base plate 9, for example by means of screws 14.
  • the guide tube 11 On the interior side 1 of the cell, the guide tube 11 carries a double crossing door waterproof 13 which has the subsequent function of allowing the passage of material from inside 1 of the cell to inside the guide tube 11.
  • This double door 13 is introduced at the same time as the guide tube 11, because it is mounted on the latter beforehand.
  • FIG. 2 shows the assembly of this double door 13 on the guide tube 11 by a thread 16 and a sealing weld 16A.
  • This double door is load-bearing a central tube 20 intended to ensure the transfer of materials or small containers.
  • the process continues with the removal of the sealing bell 5 which remains inside 1 of the cell. It is dismantled by a remote manipulator placed at inside 1 of the cell.
  • the next step is to mount a crown seal holder 15 from inside the cell 1 by remote handling on the outside diameter of the end inside of the guide tube 11 located inside the cell.
  • the function of this seal carrier ring 15 is sealing between the interior 1 of the cell and the annular space 17 subsisting between the sheath 6 and the guide tube 11.
  • Figure 2 also shows in detail the assembly of such a seal carrier ring 15.
  • This seal carrier ring 15 is made by means of several captive nuts 18 actuated by a remote manipulator from inside the cell 1.
  • first seal 21 On the outside diameter of the guide tube 11, is placed a first seal 21 in a groove thereof. This first seal 21 seals between the guide tube 11 and the sleeve 6.
  • a second seal 22 is placed just outside of the skin 4, opposite the seal carrier crown 15. It seals between the skin 4 and the guide tube 11, that is to say between the interior 1 of the cell and the space 28 located between the skin 4 and the internal face of the existing wall 3 between the guide tube 11 and the sleeve 6.
  • This second seal 22 is completed with a third seal 23 placed in a groove lying on the internal diameter of the crown seal holder 15 and being supported on the external diameter of the guide tube 11.
  • Locking the captive nuts 18 ensures the sealing of the crown 15 with the guide tube 11, while that the pulling carried out to press the crown metallic 15 on the skin of the cell makes it possible to obtain, when the metal contact is made, the crushing of the seal 22 with a force which ensures sealing.
  • the whole watertight bushing according to the invention is held in place by means of support screws 24 and clamping screws 14.
  • a tool is used for this purpose traction (not shown) composed mainly a hydraulic cylinder bearing both on the plate base 9 and on the support flange 12. Indeed, by pulling the latter towards the outside 2 of the cell, the screws support 24 can be clamped in the support flange 12 to come to rest against the base plate 9, so that hold in place the entire watertight bushing and compress the second joint as much as possible 22. Once the adequate tightening, tightening screws 14 are tight in base plate 9 and the entire bushing waterproof is then fixed.
  • the pulling tool can then be disassembled.
  • the second seal 22 can be glued and that its material can be that referenced 7EP42 (nuclear).
  • the maximum crushing effort for this type of joint is 1,500 daN.
  • the effectiveness of the assembly can be the test by a test. Indeed, in order to ensure the good tightness of the assembled assembly (guide tube, container, seal ring), two tubes 26A and 26B are placed at inside the annular space between the sleeve 6 and the guide tube 11 and are connected to the outside. The 26B tube is located directly behind the flange 12.
  • the test consists of fill the trapped space through the tube 26B by the guide tube and the seal carrier ring 15 of a gas neutral (nitrogen, argon ...) at a certain pressure and check thanks to a pressure gauge mounted at the end of the outlet side of tube 26A if the pressure drops after a while defined before.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Manipulator (AREA)

Description

Domaine de l'inventionField of the invention

L'invention concerne l'implantation d'équipements dans le mur d'une cellule étanche utilisée pour des travaux en atmosphère de haute activité par exemple pour le transfert de déchets ou petits outillages irradiés à travers le mur, et en particulier l'implantation d'une traversée étanche. Cette implantation doit pouvoir avoir lieu après la mise en service de la cellule, c'est-à-dire lorsque l'intérieur de la cellule est déjà contaminé.The invention relates to the installation of equipment in the wall of a waterproof cell used for work in high activity atmosphere for example for transfer waste or small tools irradiated through the wall, and in particular the establishment of a watertight crossing. This installation must be possible after commissioning of the cell, i.e. when the interior of the cell is already contaminated.

Art antérieur et problème poséPrior art and problem posed

Dans le cadre de l'utilisation de cellules dites "à haute activité", il arrive que l'on soit dans l'obligation de prévoir l'implantation dans un ou plusieurs passages d'un mur de la cellule en activité de certains types d'équipements tels que des télémanipulateurs, des caméras, des périscopes ou des traversées mécaniques. Ces dernières permettent en outre d'évacuer des déchets ou des petits outillages irradiés de la cellule ou l'introduction d'échantillons à traiter à l'intérieur. Ces opérations sont effectuées par l'intermédiaire de conteneurs spéciaux de transport, appelés "châteaux de transport" qui sont accostés à la traversée mécanique. Les passages en question peuvent être effectués avec l'outil de coupe et selon le procédé décrit dans la demande de brevet français FR-A-2 601 282 du 4 juin 1986.In the context of the use of so-called cells "high activity", we sometimes have to to plan the establishment in one or more passages of a cell wall in activity of certain types of equipment such as remote manipulators, cameras, periscopes or mechanical crossings. These allow in in addition to disposing of irradiated waste or small tools of the cell or the introduction of samples to be treated at the interior. These operations are carried out by through special transport containers, called "transport castles" which are docked at the crossing mechanical. The passages in question can be made with the cutting tool and according to the process described in the French patent application FR-A-2 601 282 of June 4, 1986.

Par ailleurs, la cellule possède une paroi intérieure, appelée "peau", en tôle d'acier inoxydable. Elle a pour fonction de confiner l'atmosphère contaminée de la cellule et également d'empêcher l'air extérieur d'y pénétrer. Le problème technique qui se pose alors est l'obtention d'une étanchéité de très haut niveau entre l'équipement implanté dans le mur avec la paroi de la cellule et en particulier la peau.In addition, the cell has a wall inner, called "skin", made of stainless steel sheet. She has the function of confining the contaminated atmosphere of the cell and also to prevent outside air from entering it. The technical problem which then arises is obtaining a very high level sealing between the installed equipment in the wall with the cell wall and in particular the skin.

On utilise actuellement une solution permettant d'obtenir une étanchéité de la traversée mécanique à travers le mur de la cellule avec la peau, mais cette solution n'est pas d'une grande fiabilité. Elle consiste en outre à effectuer une soudure du fourreau de la traversée mécanique sur la peau de la cellule. On note à ce sujet que la réalisation d'un cordon de soudure est possible à l'intérieur de la cellule entre la peau et le fourreau, mais que le contrôle de ce cordon est délicat, compte tenu qu'il se situe du côté contaminé de la cellule. On ajoute que ce cordon est réalisé par une machine tournante introduite dans le fourreau. La mise en oeuvre du procédé s'avère délicate, une reprise étant nécessaire pour terminer l'opération de soudage. D'autre part, cette solution ne peut pas s'appliquer à des traversées mécaniques dont les diamètres sont plus petits que la capacité de la machine à souder.We are currently using a solution allowing to obtain a seal of the mechanical crossing through the cell wall with the skin, but this solution is not not very reliable. It also consists of weld the sleeve of the mechanical crossing on the skin of the cell. We note on this subject that the welding bead is possible inside of the cell between the skin and the sheath, but that the control of this cord is delicate, given that it is located on the contaminated side of the cell. We add that this cord is produced by a rotating machine introduced into the scabbard. The implementation of the process is delicate, a recovery being necessary to complete the operation of welding. On the other hand, this solution cannot be applied at mechanical crossings with larger diameters smaller than the capacity of the welding machine.

Le but de l'invention est donc de remédier à cet inconvénient en proposant un autre procédé d'installation d'une traversée étanche dans le mur d'une cellule dans laquelle sont effectués des travaux à haut degré de contamination.The object of the invention is therefore to remedy this disadvantage by proposing another installation method of a waterproof crossing in the wall of a cell in which are carried out work with a high degree of contamination.

Résumé de l'inventionSummary of the invention

A cet effet, l'objet principal de l'invention est un procédé d'installation d'une traversée étanche dans le mur d'une cellule à haute activité comprenant :

  • un mur épais ;
  • une peau métallique placée à l'intérieur de la cellule contre le mur ;
  • un passage à travers le mur et la peau ; et
  • une cloche d'étanchéité introduite au préalable dans la cellule à l'aide d'un télémanipulateur et placée après la trépanation de la peau de la cellule contre la peau à l'intérieur de la cellule autour du passage.
To this end, the main object of the invention is a method of installing a sealed crossing in the wall of a high activity cell comprising:
  • a thick wall;
  • a metal skin placed inside the cell against the wall;
  • a passage through the wall and the skin; and
  • a sealing bell previously introduced into the cell using a remote manipulator and placed after trephanning the skin of the cell against the skin inside the cell around the passage.

Le procédé comprend les étapes successives suivantes :

  • a) mise en place d'un fourreau dans le passage ;
  • b) réglage de la perpendicularité entre le côté extérieur du mur et le fourreau ;
  • c) montage et fixation de la plaque de base sur l'extérieur du mur de la cellule ;
  • d) soudage du fourreau sur la plaque de base ;
  • e) montage dans le fourreau d'un tube guide équipé d'une double porte étanche placée à l'intérieur de la cellule ;
  • f) dégagement de la cloche ;
  • g) montage d'une couronne porte-joints introduite au préalable à l'intérieur de la cellule pour isoler la cellule de l'extérieur au niveau du tube-guide et du fourreau.
    • The process includes the following successive steps:
  • a) placing a sheath in the passage;
  • b) adjustment of the perpendicularity between the external side of the wall and the sheath;
  • c) mounting and fixing the base plate on the outside of the cell wall;
  • d) welding the sheath to the base plate;
  • e) mounting in the sheath of a guide tube equipped with a sealed double door placed inside the cell;
  • f) release of the bell;
  • g) mounting of a seal carrier ring introduced beforehand inside the cell to isolate the cell from the outside at the guide tube and the sheath.

    • On peut également compléter avantageusement l'invention par deux étapes supplémentaires :

  • h) serrage d'écrous imperdables de la couronne porte-joints ; et
  • i) serrage de l'ensemble sur le mur de la cellule.
    • The invention can also advantageously be supplemented by two additional steps:
  • h) tightening captive nuts of the seal carrier ring; and
  • i) tightening of the assembly on the cell wall.

    • De préférence, pendant les opérations f) de dégagement de la cloche et g) de montage de la couronne porte-joints, une ventilation de l'extérieur vers l'intérieur de la cellule est appliquée à la traversée pour s'affranchir d'éventuelles fuites d'air contaminé de l'intérieur vers l'extérieur de la cellule.Preferably, during the operations f) of bell release and g) mounting the crown seal holders, ventilation from outside to inside of the cell is applied to the crossing to overcome possible leakage of contaminated air from the interior to outside the cell.

    Un autre objet de l'invention porte sur une traversée étanche à travers le mur d'une cellule à haute activité comprenant :

    • un fourreau tubulaire ;
    • un tube-guide placé à l'intérieur du fourreau ;
    • une double porte-étanche placée à une première extrémité du fourreau et du tube-guide ;
    • une bride d'appui placée à une deuxième extrémité du fourreau et du tube-guide, entre ces deux derniers éléments ;
    • une bride porte-joints placée à la première extrémité du fourreau et du tube-guide de manière à pouvoir prendre appui contre la paroi interne d'une peau recouvrant l'intérieur de la cellule, en comprimant au moins un deuxième joint contre la première extrémité du fourreau et la paroi extérieure du tube-guide.
    Another object of the invention relates to a sealed crossing through the wall of a high activity cell comprising:
    • a tubular sheath;
    • a guide tube placed inside the sheath;
    • a double watertight door placed at a first end of the sleeve and of the guide tube;
    • a support flange placed at a second end of the sleeve and of the guide tube, between these last two elements;
    • a seal-carrying flange placed at the first end of the sleeve and of the guide tube so as to be able to bear against the internal wall of a skin covering the interior of the cell, compressing at least one second seal against the first end of the sleeve and the outer wall of the guide tube.

    De préférence, elle comprend un premier joint placé dans une rainure de la surface externe du tube-guide et étant en appui contre la surface interne du fourreau.Preferably, it includes a first seal placed in a groove on the outer surface of the guide tube and being in abutment against the internal surface of the sheath.

    Elle peut se compléter d'un joint placé dans une rainure à l'intérieur de la bride porte-joint et prenant appui sur la surface externe du tube-guide.It can be completed with a seal placed in a groove inside the seal flange and taking support on the external surface of the guide tube.

    Liste des figuresList of Figures

    L'invention et ses différentes caractéristiques techniques seront mieux comprises à la lecture de la description suivante, accompagnée de deux figures représentant respectivement :

    • figure 1, en coupe, l'implantation de la traversée selon l'invention dans le mur d'une cellule ; et
    • figure 2, en coupe, un détail de réalisation de la traversée étanche selon l'invention.
    The invention and its various technical characteristics will be better understood on reading the following description, accompanied by two figures representing respectively:
    • Figure 1, in section, the layout of the crossing according to the invention in the wall of a cell; and
    • Figure 2, in section, a detail of the waterproof crossing according to the invention.

    Description détaillée d'une réalisation de l'inventionDetailed description of a realization of the invention

    La figure 1 montre une coupe transversale du mur d'une cellule dont l'intérieur est référencé 1 et l'extérieur est référencé 2. La traversée étanche, selon l'invention, est donc placée de manière à traverser ce mur 3. On note qu'une peau 4 recouvre la surface interne du mur 3, du côté de l'intérieur 1 de la cellule. Cette peau 4 est une tôle d'acier inoxydable recouvrant la paroi interne de la cellule dans un but d'étanchéité à haute efficacité. On note qu'une cloche d'étanchéité 5 est fixée sur la peau 4 en regard du passage. Cette cloche d'étanchéité 5 est placée auparavant, au moment de l'élaboration d'un passage à travers le mur 3 et la peau 4 de la cellule, à l'intérieur de celle-ci. Elle est fixée sur la peau 4 en regard d'un passage.Figure 1 shows a cross section of the wall a cell whose interior is referenced 1 and the exterior is referenced 2. The waterproof crossing, according to the invention, is therefore placed so as to cross this wall 3. We note that a skin 4 covers the internal surface of the wall 3, on the side of inside 1 of the cell. This skin 4 is a sheet of stainless steel covering the inner wall of the cell for high efficiency sealing. We note that sealing bell 5 is fixed on the skin 4 opposite the passage. This sealing bell 5 is placed before, when developing a passage through the wall 3 and the skin 4 of the cell, inside of it. She is fixed on the skin 4 opposite a passage.

    Il faut donc considérer que l'élaboration du trou permettant le passage à travers le mur 3 est un travail préalable, mais nécessaire, avant la mise en place de la traversée étanche. La réalisation du trou dans la cellule est entreprise pour remédier à un problème auquel l'exploitant est confronté pour sortir de cette dernière des déchets ou petits outillages contaminés, mais qui n'avait pas été programmé, ni prévu.We must therefore consider that the development of the hole allowing passage through wall 3 is work prior, but necessary, before setting up the waterproof crossing. The hole in the cell is company to remedy a problem to which the operator faces to get out of the latter waste or small tools contaminated, but which had not been planned, nor planned.

    La première opération principale du procédé selon l'invention est la mise en place d'un fourreau 6 de forme tubulaire dans le passage. On note que ce passage a un diamètre intérieur égal au diamètre extérieur du fourreau 6. Le trou dans lequel est placé ce fourreau 6 est élargi du côté de l'extérieur 2 de la cellule pour pouvoir y placer, autour du fourreau 6, une protection biologique 7 nécessaire pour les installations nucléaires et constituée de billes de plomb.The first main operation of the process according to the invention is the installation of a shaped sheath 6 tubular in the passage. We note that this passage has a inner diameter equal to the outer diameter of the sleeve 6. The hole in which this sheath 6 is placed is widened by side of the outside 2 of the cell to be able to place there, around the sheath 6, biological protection 7 necessary for nuclear installations and consisting of balls of lead.

    Du côté de l'intérieur 1 de la cellule, le fourreau 6 est placé en appui sur la surface de la peau 4 qui est en regard du mur 3. Du côté extérieur 2 de la cellule, le fourreau 6 est soudé sur une plaque de base 9 placée contre la face externe 8 du mur 3. Cette plaque de base 9 permet également de contenir la protection biologique 7. Elle est d'ailleurs munie de deux orifices d'accès 19 pour les billes de plomb.On the interior side 1 of the cell, the sheath 6 is placed in abutment on the surface of the skin 4 which is facing wall 3. On the exterior side 2 of the cell, the sleeve 6 is welded to a base plate 9 placed against the external face 8 of the wall 3. This base plate 9 allows also contain biological protection 7. It is moreover provided with two access holes 19 for the balls lead.

    Le fourreau 6 permet donc de ménager un passage cylindrique à travers le mur 3 de la cellule. On ajoute qu'il est préférable de régler parfaitement la perpendicularité de ce fourreau 6 par rapport à la plaque de base 9 placée contre le mur 3.The sleeve 6 therefore makes it possible to provide a passage cylindrical through the wall 3 of the cell. We add that is better to perfectly adjust the perpendicularity of this sleeve 6 relative to the base plate 9 placed against the wall 3.

    Le montage de la plaque de base 9 se fait après le positionnement complet et le réglage en perpendicularité du fourreau 6 dans le mur 3. On peut utiliser pour la fixation de la plaque de base des chevilles 10 pénétrant dans la surface extérieure 8 du mur 3 de la cellule.The mounting of the base plate 9 is done after the complete positioning and perpendicular adjustment of the sleeve 6 in the wall 3. Can be used for fixing of the base plate of the pegs 10 entering the exterior surface 8 of the wall 3 of the cell.

    Une quatrième étape essentielle du procédé selon l'invention consiste à monter dans le fourreau 6 un tube-guide 11 dont le diamètre extérieur est légèrement inférieur au diamètre intérieur du fourreau 6. Pour le positionner du côté extérieur 2 de la cellule, on utilise une bride 12, de forme annulaire et placée à l'intérieur du fourreau 6, mais à l'extérieur de ce tube-guide 11. Elle assure donc la concentricité entre ces deux éléments tubulaires que sont le fourreau 6 et le tube-guide 11. Elle est ensuite soudée sur ce dernier et également fixée sur la plaque de base 9, par exemple au moyen de vis 14.A fourth essential step in the process according to the invention consists in mounting in the sheath 6 a guide tube 11 whose outside diameter is slightly less than the inner diameter of the sleeve 6. For the position on the outer side 2 of the cell, we use a flange 12, of annular shape and placed inside the sheath 6, but outside of this guide tube 11. It therefore ensures concentricity between these two elements tubes that are the sleeve 6 and the guide tube 11. It is then welded to the latter and also fixed to the base plate 9, for example by means of screws 14.

    Du côté de l'intérieur 1 de la cellule, le tube-guide 11 est porteur d'une double porte de traversée étanche 13 qui a pour fonction ultérieure de permettre le passage de matériel de l'intérieur 1 de la cellule à l'intérieur du tube-guide 11. Cette double porte 13 est introduite en même temps que le tube-guide 11, car elle est montée sur ce dernier au préalable. On the interior side 1 of the cell, the guide tube 11 carries a double crossing door waterproof 13 which has the subsequent function of allowing the passage of material from inside 1 of the cell to inside the guide tube 11. This double door 13 is introduced at the same time as the guide tube 11, because it is mounted on the latter beforehand.

    La figure 2 montre le montage de cette double-porte 13 sur le tube-guide 11 par un filetage 16 et une soudure d'étanchéité 16A. Cette double porte est porteuse d'un tube central 20 destiné à assurer le transfert de matériels ou containers de petites dimensions.Figure 2 shows the assembly of this double door 13 on the guide tube 11 by a thread 16 and a sealing weld 16A. This double door is load-bearing a central tube 20 intended to ensure the transfer of materials or small containers.

    Le procédé se poursuit par l'enlèvement de la cloche d'étanchéité 5 qui reste à l'intérieur 1 de la cellule. Elle est démontée par un télémanipulateur placé à l'intérieur 1 de la cellule.The process continues with the removal of the sealing bell 5 which remains inside 1 of the cell. It is dismantled by a remote manipulator placed at inside 1 of the cell.

    L'étape suivante consiste à monter une couronne porte-joints 15 de l'intérieur 1 de la cellule par télémanipulation sur le diamètre extérieur de l'extrémité intérieure du tube-guide 11 se trouvant à l'intérieur de la cellule. La fonction de cette couronne porte-joints 15 est d'assurer l'étanchéité entre l'intérieur 1 de la cellule et l'espace annulaire 17 subistant entre le fourreau 6 et le tube-guide 11.The next step is to mount a crown seal holder 15 from inside the cell 1 by remote handling on the outside diameter of the end inside of the guide tube 11 located inside the cell. The function of this seal carrier ring 15 is sealing between the interior 1 of the cell and the annular space 17 subsisting between the sheath 6 and the guide tube 11.

    La figure 2 montre également en détail le montage d'une telle couronne porte-joints 15.Figure 2 also shows in detail the assembly of such a seal carrier ring 15.

    La fixation de cette couronne porte-joints 15 se fait au moyen de plusieurs écrous imperdables 18 actionnés par un télémanipulateur depuis l'intérieur 1 de la cellule.The fixing of this seal carrier ring 15 is made by means of several captive nuts 18 actuated by a remote manipulator from inside the cell 1.

    Sur le diamètre extérieur du tube-guide 11, est placé un premier joint 21 dans une rainure de celui-ci. Ce premier joint 21 assure l'étanchéité entre le tube-guide 11 et le fourreau 6.On the outside diameter of the guide tube 11, is placed a first seal 21 in a groove thereof. This first seal 21 seals between the guide tube 11 and the sleeve 6.

    Un deuxième joint 22 est placé juste à l'extérieur de la peau 4, en regard de la couronne porte-joints 15. Il assure l'étanchéité entre la peau 4 et le tube-guide 11, c'est-à-dire entre l'intérieur 1 de la cellule et l'espace 28 situé entre la peau 4 et la face interne du mur 3 existant entre le tube-guide 11 et le fourreau 6. Ce deuxième joint 22 est complété d'un troisième joint 23 placé dans une rainure se trouvant sur le diamètre interne de la couronne porte-joints 15 et étant en appui sur le diamètre externe du tube-guide 11.A second seal 22 is placed just outside of the skin 4, opposite the seal carrier crown 15. It seals between the skin 4 and the guide tube 11, that is to say between the interior 1 of the cell and the space 28 located between the skin 4 and the internal face of the existing wall 3 between the guide tube 11 and the sleeve 6. This second seal 22 is completed with a third seal 23 placed in a groove lying on the internal diameter of the crown seal holder 15 and being supported on the external diameter of the guide tube 11.

    Le blocage des écrous imperdables 18 assure l'étanchéité de la couronne 15 avec le tube guide 11, tandis que la mise en traction effectuée pour plaquer la couronne métallique 15 sur la peau de la cellule permet d'obtenir, lorsque le contact métallique est réalisé, l'écrasement du joint 22 avec une force qui assure l'étanchéité.Locking the captive nuts 18 ensures the sealing of the crown 15 with the guide tube 11, while that the pulling carried out to press the crown metallic 15 on the skin of the cell makes it possible to obtain, when the metal contact is made, the crushing of the seal 22 with a force which ensures sealing.

    L'ensemble de la traversée étanche selon l'invention est maintenu en place grâce à des vis d'appui 24 et des vis de serrage 14. On utilise à cet effet un outillage de mise en traction (non représenté) composé principalement d'un vérin hydraulique prenant appui à la fois sur la plaque de base 9 et sur la bride d'appui 12. En effet, en tirant cette dernière vers l'extérieur 2 de la cellule, les vis d'appui 24 peuvent être serrées dans la bride d'appui 12 pour venir prendre-appui contre la plaque de base 9, de manière à maintenir en place l'ensemble de la traversée étanche et de comprimer au maximum le deuxième joint 22. Une fois le serrage adéquat exercé, les vis de serrage 14 sont serrées dans la plaque de base 9 et l'ensemble de la traversée étanche est alors fixé.The whole watertight bushing according to the invention is held in place by means of support screws 24 and clamping screws 14. A tool is used for this purpose traction (not shown) composed mainly a hydraulic cylinder bearing both on the plate base 9 and on the support flange 12. Indeed, by pulling the latter towards the outside 2 of the cell, the screws support 24 can be clamped in the support flange 12 to come to rest against the base plate 9, so that hold in place the entire watertight bushing and compress the second joint as much as possible 22. Once the adequate tightening, tightening screws 14 are tight in base plate 9 and the entire bushing waterproof is then fixed.

    L'outillage de mise en traction peut alors être démonté.The pulling tool can then be disassembled.

    C'est à ce moment que peut avoir lieu le remplissage de l'espace 25, contenu à l'intérieur du mur 3 et à l'extérieur du fourreau 6, au moyen de la protection biologique 7 composée de billes de plomb.This is when the filling of space 25, contained inside wall 3 and outside of the sleeve 6, by means of the protection biological 7 composed of lead beads.

    On constate que, pendant la phase qui consiste à enlever la cloche d'étanchéité 5, et à mettre en place la couronne porte-joints 15, les risques de fuite à l'intérieur 1 vers l'extérieur 2 de la cellule sont plus importants. A cet effet, on se propose de mettre en place un sas d'intervention devant la cellule pour minimiser les éventuels risques de contamination. We note that, during the phase which consists of remove the sealing bell 5, and install the ring seal ring 15, risk of internal leakage 1 towards the outside 2 of the cell are more important. AT this effect, we propose to set up an airlock intervention in front of the cell to minimize any possible risk of contamination.

    On précise que le deuxième joint 22 peut être collé et que sa matière peut être celle référencée 7EP42 (nucléaire). L'effort maximal d'écrasement pour ce type de joint est de 1 500 daN.It is specified that the second seal 22 can be glued and that its material can be that referenced 7EP42 (nuclear). The maximum crushing effort for this type of joint is 1,500 daN.

    L'efficacité de l'ensemble peut être mise à l'épreuve par un test. En effet, afin de s'assurer de la bonne étanchéité de l'ensemble monté (tube-guide, container, couronne porte-joints), deux tubes 26A et 26B sont placés à l'intérieur de l'espace annulaire entre le fourreau 6 et le tube-guide 11 et sont reliés à l'extérieur. Le tube 26B se trouve directement derrière la bride 12. Le test consiste à remplir par l'intermédiaire du tube 26B l'espace emprisonné par le tube-guide et la couronne porte-joints 15 d'un gaz neutre (azote, argon...) à une certaine pression et vérifier grâce à un manomètre monté à l'extrémité de la sortie latérale du tube 26A si la pression baisse au bout d'un temps défini auparavant.The effectiveness of the assembly can be the test by a test. Indeed, in order to ensure the good tightness of the assembled assembly (guide tube, container, seal ring), two tubes 26A and 26B are placed at inside the annular space between the sleeve 6 and the guide tube 11 and are connected to the outside. The 26B tube is located directly behind the flange 12. The test consists of fill the trapped space through the tube 26B by the guide tube and the seal carrier ring 15 of a gas neutral (nitrogen, argon ...) at a certain pressure and check thanks to a pressure gauge mounted at the end of the outlet side of tube 26A if the pressure drops after a while defined before.

    Claims (7)

    1. Process for installing a tight crossing in the wall (3) of a tight cell, the latter comprising a thick wall (3), a metal skin (4) placed in the interior (1) of the cell against the wall (3), a passage through the wall (3) and the skin (4) and a sealing bell (5) placed against the skin (4) within the interior (1) of the cell, around the passage, the process comprising the following successive stages:
      a) placing a sleeve (6) in the passage,
      b) regulating the perpendicularity between the outside of the wall (3) and the sleeve (6),
      c) fitting a base plate (9) against the outer wall (8) of the cell wall (3),
      d) welding the sleeve (6) to the base plate (9),
      e) fitting within the sleeve (6) a guide tube (11) equipped with a tight double door (13) positioned facing the cell interior, under the sealing bell (5),
      f) release of the sealing bell (5),
      g) fitting a joint holder ring (15) through the interior of the cell to insulate the cell from the exterior (2) at the guide tube (11) and sleeve (6).
    2. Process according to claim 1, characterized in that it comprises the two following supplementary stages:
      h) securing captive nuts (18) on the joint holder ring (15) and i) fixing the tight crossing to the cell.
    3. Process according to claim 1, characterized in that it comprises a supplementary ventilation stage from the exterior (2) to the interior (1) of the cell during the fifth (f) and sixth g) operations corresponding respectively to the release of the sealing bell (5) and the fitting of the joint holder ring (15).
    4. Tight crossing through the wall (13) of a high activity cell comprising a tubular sleeve (6), a guide tube (11) placed in the interior of the sleeve (6), a tight double door (13) placed at a first end of the sleeve (6) and the guide tube (11), a support flange (12) placed at a second end of the sleeve (6) and the guide tube (11) between the two latter components (6, 11) and a joint holder flange (15) placed at the first end of the sleeve (6) and the guide tube (11), so as to be able to bear against the inner wall of a skin (4) covering the interior of the cell, by compressing at least one second joint (22) against the first end of the sleeve (6) and the outer wall of the guide tube (11).
    5. Tight crossing according to claim 4, characterized in that it comprises a first joint (21) placed in a groove of the outer surface of the guide tube (11) and bearing against the inner surface of the sleeve (6).
    6. Tight crossing according to claim 4 or 5, characterized in that it comprises a third joint (23) placed in a groove within the joint holder flange (15) and bearing against the outer surface of the guide tube (11).
    7. Tight crossing according to claim 4, characterized in that it comprises two tubes (26A, 26B) placed between the sleeve (6) and the guide tube (11) and connected to the exterior in order to test the sealing of the crossing.
    EP96401010A 1995-05-12 1996-05-10 Method for installing a sealed passage through a cell wall Expired - Lifetime EP0742562B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9505653 1995-05-12
    FR9505653A FR2734078B1 (en) 1995-05-12 1995-05-12 METHOD FOR INSTALLING A WATERPROOF FITTING IN THE WALL OF A CELL

    Publications (2)

    Publication Number Publication Date
    EP0742562A1 EP0742562A1 (en) 1996-11-13
    EP0742562B1 true EP0742562B1 (en) 1999-03-31

    Family

    ID=9478921

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96401010A Expired - Lifetime EP0742562B1 (en) 1995-05-12 1996-05-10 Method for installing a sealed passage through a cell wall

    Country Status (5)

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    US (1) US5725331A (en)
    EP (1) EP0742562B1 (en)
    JP (1) JPH08304590A (en)
    DE (1) DE69601895T2 (en)
    FR (1) FR2734078B1 (en)

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    US7797893B2 (en) * 2006-05-11 2010-09-21 Specified Technologies Inc. Apparatus for reinforcing and firestopping around a duct extending through a structural panel
    DE202006011374U1 (en) * 2006-07-25 2006-09-21 Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg Device for leading a pipe through a wall opening comprises a hollow insulating element with an insulating shell made of mineral fibers
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    BE1023860B1 (en) * 2016-02-18 2017-08-22 Aseptic Technologies S.A. Connection system
    CN108303723A (en) * 2018-04-16 2018-07-20 广东省建筑工程机械施工有限公司 A kind of hot cell dose detector sleeve structure

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    Also Published As

    Publication number Publication date
    DE69601895D1 (en) 1999-05-06
    FR2734078B1 (en) 1997-06-13
    EP0742562A1 (en) 1996-11-13
    DE69601895T2 (en) 1999-09-30
    FR2734078A1 (en) 1996-11-15
    JPH08304590A (en) 1996-11-22
    US5725331A (en) 1998-03-10

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