EP0742562A1 - Method for installing a sealed passage through a cell wall - Google Patents

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

Info

Publication number
EP0742562A1
EP0742562A1 EP96401010A EP96401010A EP0742562A1 EP 0742562 A1 EP0742562 A1 EP 0742562A1 EP 96401010 A EP96401010 A EP 96401010A EP 96401010 A EP96401010 A EP 96401010A EP 0742562 A1 EP0742562 A1 EP 0742562A1
Authority
EP
European Patent Office
Prior art keywords
cell
wall
guide tube
sheath
seal
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.)
Granted
Application number
EP96401010A
Other languages
German (de)
French (fr)
Other versions
EP0742562B1 (en
Inventor
Jacques Martinez
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP0742562A1 publication Critical patent/EP0742562A1/en
Application granted granted Critical
Publication of EP0742562B1 publication Critical patent/EP0742562B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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 sealed cell used for work in a high activity atmosphere for example for the transfer of waste or small irradiated tools through the wall, and in particular the installation of '' a waterproof crossing.
  • This implantation must be able to take place after the cell is put into service, that is to say when the inside of the cell is already contaminated.
  • the cell has an inner wall, called “skin", made of stainless steel sheet. Its function is to confine 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 of seal between the equipment implanted in the wall with the cell wall and in particular the skin.
  • a solution is currently used making it possible to obtain a seal of the mechanical crossing through the wall of the cell with the skin, but this solution is not very reliable. It also consists in carrying out a welding of the sleeve of the mechanical crossing on the skin of the cell.
  • the production of a weld bead is possible inside the cell between the skin and the sheath, but that the control of this bead is delicate, given that it is located on the contaminated side. of the cell. It is added that this cord is produced by a rotating machine inserted into the sheath.
  • the implementation of the process proves to be delicate, a recovery being necessary to complete the welding operation.
  • this solution cannot be applied to mechanical bushings whose diameters are smaller than the capacity of the welding machine.
  • the object of the invention is therefore to remedy this drawback by proposing another method of installing a sealed crossing in the wall of a cell in which work is carried out with a high degree of contamination.
  • ventilation from the outside to the inside of the cell is applied to the crossing to overcome any possible leakage of contaminated air from the inside to the outside of the cell.
  • it comprises a first seal placed in a groove on the external 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 of a cell whose interior is referenced 1 and the exterior is referenced 2.
  • the sealed 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 interior side 1 of the cell.
  • This skin 4 is a sheet of stainless steel covering the internal wall of the cell for the purpose of high-efficiency sealing.
  • a sealing bell 5 is fixed on the skin 4 opposite the passage. This sealing bell 5 is placed before, at the time of the development of a passage through the wall 3 and the skin 4 of the cell, inside the latter. It is fixed on the skin 4 opposite a passage.
  • the first main operation of the method according to the invention is the establishment of a sheath 6 of tubular shape in the passage. It is noted that this passage has an inside diameter equal to the outside diameter of the sleeve 6.
  • the hole in which this sleeve 6 is placed is widened on the outside side 2 of the cell so as to be able to place there, around the sleeve 6, a protection biological 7 necessary for nuclear installations and made of lead beads.
  • 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 the wall 3. On the outer side 2 of the cell, the sheath 6 is welded to a base plate 9 placed against the external face 8 of the wall 3. This base plate 9 also makes it possible to contain the biological protection 7. It is moreover provided with two access orifices 19 for the lead balls.
  • the sleeve 6 therefore makes it possible to provide a cylindrical passage through the wall 3 of the cell. We add that it is preferable to perfectly adjust the perpendicularity of this sleeve 6 with respect to the base plate 9 placed against the wall 3.
  • the mounting of the base plate 9 is done after the complete positioning and the perpendicular adjustment of the sleeve 6 in the wall 3.
  • Anchors 10 penetrating into the exterior surface 8 of the wall 3 can be used for fixing the base plate. of the cell.
  • a fourth essential step of the method according to the invention consists in mounting in the sheath 6 a guide tube 11 whose outside diameter is slightly less than the inside diameter of the sheath 6. To position it on the outside side 2 of the cell, a flange 12, of annular shape and placed inside the sheath 6, but outside this guide tube 11. It therefore ensures concentricity between these two tubular elements that are the sheath 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 sealed crossing door 13 which has the subsequent function of allowing material to pass from the interior 1 of the cell to the interior of 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 mounting of this double door 13 on the guide tube 11 by a thread 16 and a sealing weld 16A.
  • This double door carries a central tube 20 intended to ensure the transfer of materials or containers of small dimensions.
  • 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 inside 1 of the cell.
  • the next step consists in mounting a seal carrier ring 15 from the interior 1 of the cell by remote manipulation on the outside diameter of the interior end of the guide tube 11 located inside the cell.
  • the function of this seal carrier ring 15 is to ensure sealing between the interior 1 of the cell and the annular space 17 existing between the sheath 6 and the guide tube 11.
  • FIG. 2 also shows in detail the mounting 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.
  • a first seal 21 is placed in a groove of the latter. This first seal 21 seals between the guide tube 11 and the sleeve 6.
  • a second seal 22 is placed just outside the skin 4, opposite the seal carrier ring 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 wall 3 existing between the guide tube 11 and the sheath 6.
  • This second seal 22 is completed with a third seal 23 placed in a groove on the internal diameter of the crown seal holder 15 and being supported on the external diameter of the guide tube 11.
  • the locking of the captive nuts 18 seals the crown 15 with the guide tube 11, while the pulling effect carried out to press the metal crown 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 of the watertight bushing according to the invention is held in place by means of support screws 24 and clamping screws 14.
  • a traction tool (not shown) mainly composed of a hydraulic cylinder bearing both on the base plate 9 and on the support flange 12.
  • the support screws 24 can be tightened in the flange support 12 to come to bear against the base plate 9, so as to hold in place the whole of the sealed bushing and to compress the second seal 22 as much as possible.
  • the tensioning tool can then be removed.
  • the second seal 22 can be glued and that its material can be that referenced 7EP42 (nuclear).
  • the maximum crushing force for this type of joint is 1,500 daN.
  • the effectiveness of the assembly can be tested by a test.
  • two tubes 26A and 26B are placed inside the annular space between the sleeve 6 and the guide tube 11 and are connected to the outside.
  • the tube 26B is located directly behind the flange 12.
  • the test consists in filling, by means of the tube 26B, the space trapped by the guide tube and the seal carrier ring 15 with a neutral gas (nitrogen, argon. .) at a certain pressure and check, using a pressure gauge mounted at the end of the lateral outlet of the tube 26A, whether the pressure drops after a time defined previously.

Landscapes

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

Abstract

A radioactive hot cell has a thick wall (3) with a metal lining (4) and an access port comprising a pipe (6) extending through the wall and enclosing a second pipe (11). An annular flange (12) closes the gap between the outer ends of the pipes, and the inner end of pipe (11) is closed by a double door (13). A ring (15) inside the cell seals between pipe (11) and lining (4). Also claimed is a method of installing the port wherein a cover (5) inside the cell initially closes the inner end of a through passage into which pipe (6) is inserted until it abuts the outer face of the lining. A flat annular flange (9) is bolted to the outside of wall (3), and the outer end of pipe (6) is then welded thereto. Pipe (11) with its double door (13) is slid into pipe (6), cover (5) is removed and finally ring (15) is secured inside the cell to complete the sealing.

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 sealed cell used for work in a high activity atmosphere for example for the transfer of waste or small irradiated tools through the wall, and in particular the installation of '' a waterproof crossing. This implantation must be able to take place after the cell is put into service, that is to say when the inside 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 n° 86 09915 du 4 juin 1986.In the context of the use of so-called "high activity" cells, it is sometimes necessary to provide for the implantation in one or more passages of a wall of the active cell of certain types of equipment such as manipulators, cameras, periscopes or mechanical crossings. The latter also make it possible to evacuate waste or small irradiated tools from the cell or the introduction of samples to be treated inside. These operations are carried out by means of special transport containers, called "transport castles" which are docked at the mechanical crossing. The passages in question can be carried out with the cutting tool and according to the method described in French patent application No. 86,09915 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 an inner wall, called "skin", made of stainless steel sheet. Its function is to confine 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 of seal between the equipment implanted 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.A solution is currently used making it possible to obtain a seal of the mechanical crossing through the wall of the cell with the skin, but this solution is not very reliable. It also consists in carrying out a welding of the sleeve of the mechanical crossing on the skin of the cell. We note in this regard that the production of a weld bead is possible inside the cell between the skin and the sheath, but that the control of this bead is delicate, given that it is located on the contaminated side. of the cell. It is added that this cord is produced by a rotating machine inserted into the sheath. The implementation of the process proves to be delicate, a recovery being necessary to complete the welding operation. On the other hand, this solution cannot be applied to mechanical bushings whose diameters are 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 drawback by proposing another method of installing a sealed crossing in the wall of a cell in which work is carried out 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 disengaging the bell and g) of mounting of the seal carrier ring, ventilation from the outside to the inside of the cell is applied to the crossing to overcome any possible leakage of contaminated air from the inside to the outside of 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 comprises a first seal placed in a groove on the external 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 supplemented by a seal placed in a groove inside the seal holder flange and bearing 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 an embodiment 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 of a cell whose interior is referenced 1 and the exterior is referenced 2. The sealed 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 interior side 1 of the cell. This skin 4 is a sheet of stainless steel covering the internal wall of the cell for the purpose of high-efficiency sealing. It is noted that a sealing bell 5 is fixed on the skin 4 opposite the passage. This sealing bell 5 is placed before, at the time of the development of a passage through the wall 3 and the skin 4 of the cell, inside the latter. It 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.It must therefore be considered that the development of the hole allowing passage through the wall 3 is a preliminary work, but necessary, before the installation of the waterproof crossing. The realization of the hole in the cell is undertaken to remedy a problem with which the operator is confronted to leave contaminated waste or small tools from the latter, but which had not been planned or 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 method according to the invention is the establishment of a sheath 6 of tubular shape in the passage. It is noted that this passage has an inside diameter equal to the outside diameter of the sleeve 6. The hole in which this sleeve 6 is placed is widened on the outside side 2 of the cell so as to be able to place there, around the sleeve 6, a protection biological 7 necessary for nuclear installations and made of lead beads.

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 the wall 3. On the outer side 2 of the cell, the sheath 6 is welded to a base plate 9 placed against the external face 8 of the wall 3. This base plate 9 also makes it possible to contain the biological protection 7. It is moreover provided with two access orifices 19 for the lead balls.

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 cylindrical passage through the wall 3 of the cell. We add that it is preferable to perfectly adjust the perpendicularity of this sleeve 6 with respect 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 the perpendicular adjustment of the sleeve 6 in the wall 3. Anchors 10 penetrating into the exterior surface 8 of the wall 3 can be used for fixing the base plate. 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 of the method according to the invention consists in mounting in the sheath 6 a guide tube 11 whose outside diameter is slightly less than the inside diameter of the sheath 6. To position it on the outside side 2 of the cell, a flange 12, of annular shape and placed inside the sheath 6, but outside this guide tube 11. It therefore ensures concentricity between these two tubular elements that are the sheath 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 sealed crossing door 13 which has the subsequent function of allowing material to pass from the interior 1 of the cell to the interior of 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 mounting of this double door 13 on the guide tube 11 by a thread 16 and a sealing weld 16A. This double door carries a central tube 20 intended to ensure the transfer of materials or containers of small dimensions.

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 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 consists in mounting a seal carrier ring 15 from the interior 1 of the cell by remote manipulation on the outside diameter of the interior end of the guide tube 11 located inside the cell. The function of this seal carrier ring 15 is to ensure sealing between the interior 1 of the cell and the annular space 17 existing 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.FIG. 2 also shows in detail the mounting 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 attachment 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, a first seal 21 is placed in a groove of the latter. 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 the skin 4, opposite the seal carrier ring 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 wall 3 existing between the guide tube 11 and the sheath 6. This second seal 22 is completed with a third seal 23 placed in a groove 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.The locking of the captive nuts 18 seals the crown 15 with the guide tube 11, while the pulling effect carried out to press the metal crown 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 of the watertight bushing according to the invention is held in place by means of support screws 24 and clamping screws 14. For this purpose, use is made of a traction tool (not shown) mainly composed of a hydraulic cylinder bearing both on the base plate 9 and on the support flange 12. In fact, by pulling the latter outwards 2 from the cell, the support screws 24 can be tightened in the flange support 12 to come to bear against the base plate 9, so as to hold in place the whole of the sealed bushing and to compress the second seal 22 as much as possible. Once the adequate tightening has been carried out, the tightening screws 14 are clamped in the base plate 9 and the whole of the sealed bushing is then fixed.

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

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.It is at this moment that the space 25, contained inside the wall 3 and outside the sheath 6 can be filled, by means of the biological protection 7 composed of lead balls.

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.It is noted that, during the phase which consists in removing the sealing bell 5, and in putting in place the seal carrier ring 15, the risks of leakage inside 1 towards outside 2 of the cell are greater. . To this end, it is proposed to set up an intervention airlock in front of the cell to minimize the possible risks 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 force 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 tested by a test. In fact, in order to ensure that the assembled assembly is properly sealed (guide tube, container, ring seal ring), two tubes 26A and 26B are placed inside the annular space between the sleeve 6 and the guide tube 11 and are connected to the outside. The tube 26B is located directly behind the flange 12. The test consists in filling, by means of the tube 26B, the space trapped by the guide tube and the seal carrier ring 15 with a neutral gas (nitrogen, argon. .) at a certain pressure and check, using a pressure gauge mounted at the end of the lateral outlet of the tube 26A, whether the pressure drops after a time defined previously.

Claims (7)

Procédé d'installation d'une traversée étanche dans le mur (3) d'une cellule étanche, cette dernière comprenant : - un mur épais (3) ; - une peau métallique (4) placée à l'intérieur (1) de la cellule, contre le mur (3) ; - un passage à travers le mur (3) et la peau (4) ; et - une cloche d'étanchéité (5) placée contre la peau (4) à l'intérieur (1) de la cellule, autour du passage, le procédé comprenant les étapes suivantes successives : a) mise en place d'un fourreau (6) dans le passage ; b) réglage de la perpendicularité entre le côté extérieur du mur (3) et le fourreau (6) ; c) montage d'une plaque de base (9) contre la paroi externe (8) du mur (3) de la cellule. d) soudage du fourreau (6) sur la plaque de base (9) e) montage dans le fourreau (6) d'un tube-guide (11) équipé d'une double porte étanche (13) placée en regard de l'intérieur de la cellule, sous la cloche d'étanchéité (5) ; f) dégagement de la cloche d'étanchéité (5) ; g) montage d'une couronne porte-joints (15) par l'intérieur de la cellule pour isoler la cellule de l'extérieur (2) au niveau du tube-guide (11) et du fourreau (6). Method for installing a sealed passage in the wall (3) of a sealed cell, the latter comprising: - a thick wall (3); - a metal skin (4) placed inside (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) inside (1) of the cell, around the passage, the method comprising the following successive steps: a) placing a sheath (6) in the passage; b) adjustment of the perpendicularity between the external side of the wall (3) and the sheath (6); c) mounting a base plate (9) against the external wall (8) of the wall (3) of the cell. d) welding of the sleeve (6) on the base plate (9) e) mounting in the sheath (6) of a guide tube (11) equipped with a sealed double door (13) placed opposite the interior of the cell, under the sealing bell (5); f) release of the sealing bell (5); g) mounting of a seal carrier ring (15) from the inside of the cell to isolate the cell from the outside (2) at the level of the guide tube (11) and the sheath (6). Procédé selon la revendication 1, caractérisé en ce qu'il comprend les deux étapes supplémentaires suivantes : h) serrage d'écrous imperdables (18) sur la couronne porte-joints (15) ; et i) serrage de l'ensemble de la traversée étanche sur la cellule. Method according to claim 1, characterized in that it comprises the following two additional steps: h) tightening captive nuts (18) on the seal carrier ring (15); and i) tightening of the entire sealed bushing on the cell. Procédé selon la revendication 1, caractérisé en ce qu'il comprend une étape supplémentaire de ventilation dans le sens extérieur (2), intérieur (1) de la cellule pendant les cinquième f) et sixième g) opérations correspondant respectivement au dégagement de la cloche d'étanchéité (5) et au montage de la couronne porte-joints (15).Method according to claim 1, characterized in that it comprises an additional step of ventilation in the outside (2), inside (1) direction of the cell during the fifth f) and sixth g) operations corresponding respectively to the release of the bell seal (5) and mounting the seal carrier ring (15). Traversée étanche à travers le mur (3) d'une cellule à haute activité comprenant : - un fourreau (6) tubulaire ; - un tube-guide (11) placé à l'intérieur du fourreau (6) ; - une double porte-étanche (13) placée à une première extrémité du fourreau (6) et du tube-guide (11) ; - une bride d'appui (12) placée à une deuxième extrémité du fourreau (6) et du tube-guide (11), entre ces deux derniers éléments (6 et 11) ; - une bride porte-joints (15) placée à la première extrémité du fourreau (6) et du tube-guide (11) de manière à pouvoir prendre appui contre la paroi interne d'une peau (4) recouvrant l'intérieur de la cellule, en comprimant au moins un deuxième joint (22) contre la première extrémité du fourreau (6) et la paroi extérieure du tube-guide (11). Sealed passage through the wall (3) of a high activity cell comprising: - a tubular sheath (6); - a guide tube (11) placed inside the sheath (6); - a double sealed door (13) placed at a first end of the sleeve (6) and of the guide tube (11); - a support flange (12) placed at a second end of the sleeve (6) and of the guide tube (11), between these two latter elements (6 and 11); - a seal carrier flange (15) placed at the first end of the sleeve (6) and of the guide tube (11) so as to be able to bear against the internal wall of a skin (4) covering the inside of the cell, compressing at least a second seal (22) against the first end of the sleeve (6) and the outer wall of the guide tube (11). Traversée étanche selon la revendication 4, caractérisée en ce qu'elle comprend un premier joint (21) placé dans une rainure de la surface externe du tube-guide (11) et étant en appui contre la surface interne du fourreau (6).Sealed bushing according to claim 4, characterized in that it comprises a first seal (21) placed in a groove on the external surface of the guide tube (11) and being in abutment against the internal surface of the sheath (6). Traversée étanche selon la revendication 4 ou 5, caractérisée en ce qu'elle comprend un troisième joint (23) placé dans une rainure à l'intérieur de la bride porte-joint (15) et prenant appui sur la surface externe du tube-guide (11).Sealed bushing according to claim 4 or 5, characterized in that it comprises a third seal (23) placed in a groove inside the seal-carrying flange (15) and bearing on the external surface of the guide tube (11). Traversée étanche selon la revendication 4, caractérisée en ce qu'elle comprend deux tubes (26A, 26B) placés entre le fourreau (6) et le tube-guide (11) et reliés avec l'extérieur pour tester l'étanchéité de la traversée.Sealed bushing according to claim 4, characterized in that it comprises two tubes (26A, 26B) placed between the sheath (6) and the guide tube (11) and connected with the outside to test the tightness of the bushing .
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 true EP0742562A1 (en) 1996-11-13
EP0742562B1 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)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0940818A1 (en) * 1998-02-10 1999-09-08 Japan Nuclear Cycle Development Institute An airtight adapter
WO2002017332A1 (en) * 2000-08-18 2002-02-28 Glaxosmithkline Biologicals S.A. System for providing communication between the interior and the exterior of a compartment
EP3059014A1 (en) * 2015-02-23 2016-08-24 Aseptic Technologies S.A. Connecting member

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US9086174B2 (en) * 2013-03-15 2015-07-21 Securus, Inc. Extendable sleeve for poured concrete deck
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD144683A1 (en) * 1979-06-29 1980-10-29 Meinfried Kruegel WORKING OPENING, PARTICULARLY TUBE PROCESSING IN THE WALL OF A BED TANKS
DE3030030A1 (en) * 1980-08-08 1982-03-25 Hochtemperatur-Reaktorbau GmbH, 5000 Köln PERFORMANCE THROUGH THE WALL OF A PRESSURE CONCRETE PRESSURE TANK
DE3042613A1 (en) * 1980-11-12 1982-06-16 Hochtemperatur-Reaktorbau GmbH, 5000 Köln Penetration through concrete pressure vessel - has sleeve with closed ends to which double tube assemblies are welded
DE8709361U1 (en) * 1986-07-08 1987-09-10 Commissariat à l'Energie Atomique, Paris Cutting tool for creating a hole in a steel-reinforced concrete wall
DE3843311A1 (en) * 1988-12-22 1990-06-28 Wiederaufarbeitung Von Kernbre Radiation-impermeable connection

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125358A (en) * 1964-03-17 Building lead-in connection for a pipe
DE144683C (en) *
US1734966A (en) * 1922-03-23 1929-11-12 Pfaudler Co Inc Pipe connection for vessels
US2243356A (en) * 1939-08-14 1941-05-27 Taylor Instrument Co Sanitary fitting
US2348490A (en) * 1943-04-17 1944-05-09 Crane Co Flow control means
US2580802A (en) * 1948-03-29 1952-01-01 Peter H Lindberg Tank inlet and outlet seal
US2711841A (en) * 1951-01-25 1955-06-28 Basf Ag Corrosion-proof covers for pressure vessels
US2945705A (en) * 1957-09-20 1960-07-19 Victor S Murray Fitting for concrete slab
US3352756A (en) * 1964-04-07 1967-11-14 Arrangements for closing penetrations in the walls op reactor pressure containing structures
US3488067A (en) * 1967-09-12 1970-01-06 Gilbert Associates Air cooled pipe penetrations in concrete walls
US3707758A (en) * 1970-04-16 1973-01-02 Commissariat Energie Atomique Installation for mounting sealing rings and the like, especially for radioactive enclosures
US4028176A (en) * 1973-09-17 1977-06-07 Siemens Aktiengesellschaft Nuclear reactor installation
US4194948A (en) * 1977-11-14 1980-03-25 General Atomic Locking support for nuclear fuel assemblies
US4223740A (en) * 1978-05-10 1980-09-23 Clayton Maurice A Fire fighting nozzle units
US5456050A (en) * 1993-12-09 1995-10-10 Construction Consultants & Contractors, Inc. System to prevent spread of fire and smoke through wall-breaching utility holes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD144683A1 (en) * 1979-06-29 1980-10-29 Meinfried Kruegel WORKING OPENING, PARTICULARLY TUBE PROCESSING IN THE WALL OF A BED TANKS
DE3030030A1 (en) * 1980-08-08 1982-03-25 Hochtemperatur-Reaktorbau GmbH, 5000 Köln PERFORMANCE THROUGH THE WALL OF A PRESSURE CONCRETE PRESSURE TANK
DE3042613A1 (en) * 1980-11-12 1982-06-16 Hochtemperatur-Reaktorbau GmbH, 5000 Köln Penetration through concrete pressure vessel - has sleeve with closed ends to which double tube assemblies are welded
DE8709361U1 (en) * 1986-07-08 1987-09-10 Commissariat à l'Energie Atomique, Paris Cutting tool for creating a hole in a steel-reinforced concrete wall
DE3843311A1 (en) * 1988-12-22 1990-06-28 Wiederaufarbeitung Von Kernbre Radiation-impermeable connection

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0940818A1 (en) * 1998-02-10 1999-09-08 Japan Nuclear Cycle Development Institute An airtight adapter
US6296256B1 (en) 1998-02-10 2001-10-02 Japan Nuclear Cycle Development Institute Airtight adapter and a replacement method therefor
WO2002017332A1 (en) * 2000-08-18 2002-02-28 Glaxosmithkline Biologicals S.A. System for providing communication between the interior and the exterior of a compartment
US7192065B2 (en) 2000-08-18 2007-03-20 Smithkline Beecham Biologicals S.A. System for providing communication between the interior and the exterior of a compartment
US7431352B2 (en) 2000-08-18 2008-10-07 Glaxosmithkline Biologicals S.A. System for providing communication between the interior and the exterior of a compartment
KR100886638B1 (en) * 2000-08-18 2009-03-04 아스펙틱 테크놀러지스 소시에테 어나니머스 System for providing communication between the interior and the exterior of a compartment
CZ301748B6 (en) * 2000-08-18 2010-06-09 Aseptic Technologies S.A. System for making connection between the interior and exterior of a compartment, connector body, cover and their combinations for the system and method for transferring material between the inside and outside of the compartment
EP3059014A1 (en) * 2015-02-23 2016-08-24 Aseptic Technologies S.A. Connecting member
BE1022762B1 (en) * 2015-02-23 2016-08-30 Aseptic Technologies Sa Connection element
US10413480B2 (en) 2015-02-23 2019-09-17 Aseptic Technologies S.A. Connecting member
TWI687216B (en) * 2015-02-23 2020-03-11 比利時商艾斯提克科技公司 Connecting member

Also Published As

Publication number Publication date
DE69601895T2 (en) 1999-09-30
JPH08304590A (en) 1996-11-22
FR2734078B1 (en) 1997-06-13
EP0742562B1 (en) 1999-03-31
DE69601895D1 (en) 1999-05-06
US5725331A (en) 1998-03-10
FR2734078A1 (en) 1996-11-15

Similar Documents

Publication Publication Date Title
CA2564109C (en) Method of repairing a leak in a flange of a gas pipe
EP0742562B1 (en) Method for installing a sealed passage through a cell wall
CA1057539A (en) Method for connecting submerged pipes by sleeve butt welding, and apparatus therefor
FR2649923A1 (en) WORKING TOOLS WITHIN A TUBULAR ELEMENT
EP0312460B1 (en) Disconnectible element for joining two closed vessels together
EP1974357A2 (en) Method and device for closing in a water-filled pool a loaded case with irradiated nuclear fuel
CA1057538A (en) Method and apparatus for soldering submerged conducts with telescopic coupling
EP0044257B1 (en) Plant to replace a device of a circuit with contaminated fluid
EP0751531B1 (en) Connecting element for an apparatus for measuring at least one physical parameter within a nuclear reactor core
EP0244282A1 (en) Device for feeding from a distance cylindrically shaped parts to an automatic machine such as a machine for closing the tubes of a steam generator of a high-pressure nuclear reactor
FR2561612A1 (en) APPARATUS FOR INTERVENING ON A UNDERWATER TAP
FR2522436A1 (en) Nuclear fuel can filling device - having pellet guide nozzle fitted to chuck holding fuel can
EP1946330B1 (en) Fuel cladding protective collar, method for producing fuel rods and device for carrying out said method
EP0762039B1 (en) Method of connecting a branch pipe to a main
EP0358542B1 (en) Process for manufacturing a pressurizing plug and device for carrying out the same
EP2584564B1 (en) Method and device for dismantling a potentially contaminated pipe
EP0762040B1 (en) Apparatus for placing a branch-pipe fitting onto a pipe
EP0110784A1 (en) Process and device for joining a branch connection
FR2765513A1 (en) Glove box wall branch connector fitting procedure
FR2856188A1 (en) Assembly for temporary obduration of piping system, e.g. for nuclear reactor cooled by high pressure water, comprises chamber containing biological protective material
FR2752032A1 (en) Feed-through sealing device for inspection probe
EP0015812A1 (en) Removable and tight closure device for an opening of a nuclear reactor vessel
FR2664082A1 (en) DEVICE FOR OPENING AND CLOSING A SEALED COMMUNICATION PASS BETWEEN A CENTRAL CHANNEL OF A TRANSPORTABLE HOLLOW BODY AND A VERTICAL HOUSEHOLD WELL IN A FIXED STRUCTURE.
FR2751725A1 (en) Blanking equipment on a water distribution conduit
FR2672657A1 (en) Apparatus for a fluid circuit, with a standard base and replaceable active unit, and method for replacing the active unit of such apparatus

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE GB

17P Request for examination filed

Effective date: 19970416

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19980610

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB

REF Corresponds to:

Ref document number: 69601895

Country of ref document: DE

Date of ref document: 19990506

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19990603

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000510

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20000607

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010510

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010510

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020301