EP0292344A1 - Verbindungsstück zwischen einer Maschine und einem Lagerfass für feste, in einem Bindemittel eingebettete Teilchen - Google Patents

Verbindungsstück zwischen einer Maschine und einem Lagerfass für feste, in einem Bindemittel eingebettete Teilchen Download PDF

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Publication number
EP0292344A1
EP0292344A1 EP88401009A EP88401009A EP0292344A1 EP 0292344 A1 EP0292344 A1 EP 0292344A1 EP 88401009 A EP88401009 A EP 88401009A EP 88401009 A EP88401009 A EP 88401009A EP 0292344 A1 EP0292344 A1 EP 0292344A1
Authority
EP
European Patent Office
Prior art keywords
tube
barrel
cup
solid particles
connector according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP88401009A
Other languages
English (en)
French (fr)
Inventor
Christian Richard
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.)
Orano DS Demantelement et Services SA
Original Assignee
STMI Societe des Techniques en Milieu Ionisant SPL
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 STMI Societe des Techniques en Milieu Ionisant SPL filed Critical STMI Societe des Techniques en Milieu Ionisant SPL
Publication of EP0292344A1 publication Critical patent/EP0292344A1/de
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/28—Treating solids
    • G21F9/34—Disposal of solid waste
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F5/00—Transportable or portable shielded containers

Definitions

  • the invention relates to a connector intended to connect a barrel for storing solid particles coated in a binder on a machine provided with four tubes making it possible successively to create a vacuum inside the barrel, to supply the latter with solid particles mixed with liquid, aspirate the liquid to dry the solid particles, then introduce the binder inside the barrel.
  • the primary circuits of pressurized water nuclear reactors as well as the storage pools for nuclear fuel assemblies are equipped with purification pots using ion exchange resins.
  • ion exchange resins which are in the form of solid particles, must be changed periodically. Given the environment in which they were used, the used resins exhibit significant radioactivity, which requires them to be stored in metal drums placed in concrete containers. Usually, these used ion exchange resins are coated inside the barrel with an organic binder.
  • the used ion exchange resins Before coating the used ion exchange resins, a given quantity of these resins must be introduced into the barrel. To facilitate this introduction, the interior of the barrel is evacuated by means of a vacuum tube connected to a pump. The used ion exchange resins mixed with water to improve their fluidity are then introduced into the barrel. In order to reduce the radioactive effluents, the water admitted into the barrel at the same time as the resins is then recycled after being sucked out of the barrel. Finally, the organic binder is introduced so as to coat the resins contained in the barrel.
  • connection and especially the disconnection of the four machine tubes on the four barrel tubes are carried out manually by an operator who, having to remain for a relatively long time practically in direct contact with the barrel, works in a dangerous atmosphere and incorporates significant radiation doses.
  • each barrel is accompanied by four connection operations and four disconnection operations, which increases the duration of each of the cycles.
  • the subject of the invention is precisely a connector making it possible to connect in a single operation a barrel for storing solid particles coated in a binder on an appropriate machine, so that the connection and disconnection operations are very substantially shortened and can even be carried out remotely. In this way, the dangerousness of these operations is significantly reduced, as is the duration of each cycle, and the cost of manufacturing the drums and operating the installation is reduced.
  • a connector characterized in that it comprises, on the barrel, a throat suppering in its center, by means of at least one arm, the upper flared end of an internal tube, the lower end of which opens into the bottom of the barrel, below a strainer for retaining solid particles, and on the other hand on the machine, an inverted tight cup capable of being fixed on the neck of the barrel by leaktight connecting means, this cup being leaktightly traversed by the vacuum tube, by the tube for supplying solid particles mixed with a liquid and by a third tube connected both to the tube d suction of the liquid and to the binder supply tube, this third tube being connected by a flexible tube to a central end-piece resiliently supported by a non-leaktight lower support plate carried by the cup, this end-piece being supported on the upper flared end of the inner tube of the barrel when the cup is fixed to the neck of the barrel by watertight connecting means, the tube for supplying solid particles mixed with water being a central
  • At least one of the parts of the nozzle and of the flared upper end of the inner tube of the barrel capable of coming to bear one on the other carries a sealing member.
  • the endpiece crosses with clearance a hole formed in the support plate and comprises a shoulder pad normally applied to the upper face of the support plate by elastic means.
  • the cup is preferably made of at least two parts capable of being disconnected to replace this flexible tube.
  • the connecting means by which the neck of the barrel is tightly connected to the cup of the machine may for example comprise a screwed ring or a bayonet ring whose connection is manual and automatic disconnection.
  • these connecting means may also include latches resiliently biased in the locking position and means for remote control of the unlocking of the latches, which makes it possible to eliminate any direct intervention by an operator.
  • the vacuum tube can open either below the support plate, or above this plate.
  • reference 10 designates the head of a machine used to perform the various operations necessary for filling a drum with used ion exchange resins and for coating these resins in a binder.
  • This machine is in itself known and is not part of the invention. No description will therefore be made thereof.
  • the head 10 of the machine can be moved vertically between a high position making it possible to bring a barrel below it and to evacuate this barrel after filling and a low position in which the filling operations are carried out.
  • This movement of the head 10 is symbolized by the arrow F in FIG. 1.
  • the head 10 and the machine is equipped with four tubes designated by the references 12, 14, 16 and 18 in FIG. 1.
  • the tube 12 is a vacuum tube connected to a pumping circuit (not shown) of the machine and making it possible to vacuum the interior of the barrel to facilitate the introduction of the ion exchange resins.
  • the tube 14 is used to supply the barrel with ion exchange resins. For this purpose, it is connected to a metering pot (not shown) forming part of the machine. To facilitate the transfer of resins between this pot and the barrel through the tube 14, the metered resin is mixed with a small amount of water.
  • the tube 16 is a suction tube which has the function of drying the ion exchange resins after they have been transferred into the barrel, by sucking the water with which these resins were mixed in order to bring it back into the measuring jug.
  • the tube 18 makes it possible to introduce inside the barrel the organic binder which ensures the coating of the used ion exchange resins contained in the barrel.
  • the tubes 16 and 18 are connected together before leaving the head 10, to form a single tube 20.
  • the three tubes 12, 14 and 20 which protrude vertically downwards below the head 10 of the machine are connected by a single connector 22 on the metal barrel 24 shown in FIG. 3.
  • these three tubes 12, 14 and 20 pass in leaktight fashion through a horizontal upper plate 24 which constitutes the bottom of an inverted sealed cup 26, of vertical axis.
  • the plate 24 is connected to the head 10 of the machine, for example by arms 25.
  • the tube 14 for supplying resin mixed with water passes through the plate 24 along the vertical axis thereof while the tubes 12 and 20 pass through the plate 24 while being offset with respect to this axis.
  • the cup 26 comprises a cylindrical crown 28 extending downward from the plate 24 and centered on the same vertical axis as the tube 14.
  • the plate 24 and the crown 28 are connected to each other in a sealed and removable manner.
  • a ring 30, provided with an upper rim bearing on a flange formed on the plate 24, is screwed onto a thread 32 formed on the upper end of the crown 28.
  • the seal between the plate 24 and the crown 28 is provided by a seal 34 compressed by the ring 30 between the faces opposite these two parts.
  • the tube 14 is extended by an annular passage 36 of conical shape centered on the vertical axis of the cup.
  • This conical annular passage 36 is itself extended by a cylindrical annular passage 38 also centered on the vertical axis of the cup and the lower end of which projects beyond the lower end of the crown 28.
  • the ring 28 carries a horizontal lower support plate 40 which is crossed in an leaktight manner by the cylindrical annular passage 38.
  • This support plate 40 resiliently supports in its center a tubular nozzle or injector 42 whose axis is normally vertical and coincides with that of the cup 26.
  • tubular end piece 42 passes through the plate 40 with a certain clearance and has, near its upper end, a shoulder formed for example on a nut 44, which normally comes to bear on the upper face of the support plate 40
  • a compression spring 46 is compressed between the underside of the support plate 40 and a second shoulder formed on the end piece 42 below this support plate, for example in the form of a second nut 48 .
  • the lower end of the end piece 42 is terminated by a hemispherical part 42a.
  • the upper end of the end piece 42 is placed in communication with the lower end of the tube 20 located immediately below the upper plate 24 by means of a flexible tube 50.
  • a flexible tube 50 In order to allow the annular passages 38 and 36 to pass through the tube 50 and through the support plate 40, it can be seen in particular in FIG. 2 that these passages actually have at least two notches giving them in cross-section a bean shape.
  • the vertical vacuum tube 12 is preferably extended so as to open out slightly below the support plate 40. As a variant and as shown in dashed lines and with the reference 12 ′ in FIG. 1, this vacuum tube can also open immediately below the upper plate 24.
  • the metal barrel 24 which is embedded in a concrete shell 52, ends at its upper end by a cylindrical neck 24a of vertical axis, the diameter of which is identical to that of the crown 28.
  • the barrel 24 is equipped with a strainer 54 used to retain the resins.
  • a vertical tube 56 disposed along the vertical axis of the barrel 24 extends from the bottom of this barrel, below the strainer 54 to the inside of the neck 24a. At this level, the tube 56 is centered inside the neck by at least one radial arm 58. Above this arm and at a level slightly lower than the upper edge of the neck 24a, the tube 56 is flared in the form a conical part 56a in which is preferably placed a consumable conical seal 60 ( Figure 1).
  • removable and leaktight connection means 62 make it possible to connect the neck 24a of the barrel to the lower edge of the flange 26 when a barrel is placed below the head 10 of the machine.
  • these connecting means When these connecting means are connected, the hemispherical end 42a of the endpiece 42 bears on the seal 60 placed inside the flared part 56a of the ceniral tube 56 of the barrel. In this way, the end piece 2 is tightly connected to the tube 56.
  • the elastic support of the end piece 42 on the support plate 40 makes it possible to compensate for any lateral and / or height offset of the frustoconical part 56a of tube 56 relative to the neck 24a of the barrel resulting from the manufacturing tolerances of the latter.
  • the sealed connection means 62 for connecting the cup 26 on the neck 24a of the barrel comprises a ring 64 provided with an upper edge bearing on a formed flange at the lower end of the crown 28, this ring 64 being screwed onto a thread 66, formed on the outer surface of the neck 24a, at the upper end of the latter.
  • a seal 68 is compressed between the ends facing the crown 28 and the neck 24a to seal the connection.
  • the connector 62 which has just been described makes it possible to carry out in a single operation the connection of the various tubes of the machine on the barrel.
  • the operator's intervention time is therefore significantly reduced compared to existing installations, which makes it possible both to improve personnel safety, to reduce the duration of each cycle and to reduce the cost of manufacturing the barrel, whose structure is simplified.
  • the connecting means 62 comprise a screwed ring 64, so that the connection and disconnection still constitute operations of significant duration. However in this system the disconnection can be done automatically.
  • FIG. 4 shows a variant 62 ′ of the connecting means, in which the screwed ring 64 is replaced by a ring 64 ′ cooperating with a bayonet type mechanism with a flange formed at the upper end of the neck 24a of the was. More specifically, the ring 64 ′ is provided at its lower end with one or more fingers 70 which can be placed alternately either behind the flange 72 formed at the end of the neck 24a, or in regari of a notch 74 formed in this flange.
  • a compression spring 76 is interposed between a flange formed at the upper end of the ring 64 ′ and a flange formed at the lower end of the crown 28, in order to permanently press the fingers 70 formed at the lower end of the ring 64 ′ against the flange 72 of the neck 24a of the barrel.
  • the action of the operator to effect the connection and disconnection is limited to a slight rotation of the ring 64 ′ allowing the fingers 70 to be brought either behind the flange 72 , is opposite the notches 74.
  • the duration of this operation is therefore very short, with the consequence of an even greater improvement in the safety of operators.
  • the disconnection can be done automatically.
  • Figure 5 shows another variant 62 ⁇ of the connecting means between the crown 28 and the neck 24a of the barrel.
  • This variant is characterized by the fact that the link is connected automatically in the absence of any intervention and that the disconnection can be controlled remotely.
  • one or more levers 78 forming locks are pivotally mounted on the end of the crown 28, around axes perpendicular to the axis of this crown.
  • Compression springs 80 bearing on each of the levers 78 and on the outer face of the crown 28 rotate these levers so as to permanently maintain a finger 78a formed at the end of each lever behind a flange 72 formed at the end of the neck 24a of the barrel.
  • the unlocking of the link 62 ⁇ is controlled by jacks 80 also interposed between each lever 78 and the crown 28, in order to control the pivoting of the levers in the direction corresponding to the release of the fingers 78a from the crown 72.
  • the connecting means 62 ⁇ which has just been described with reference to Figure 5 has the advantage of being able to be controlled remotely, without any operator having to intervene directly near the barrel. In addition, it is locked automatically in the absence of a signal to supply the cylinders.
  • the connector 22 according to the invention also has the advantage of allowing arised cleaning of the elements which constitute it, for example after each filling operation of a barrel.
  • the machine head can be connected using the cup 26 to a drainage piece 84, of generally conical shape, connected to a drainage circuit 86. By introducing water through one or more several of the head tubes of the machine, automatic cleaning thereof is thus carried out.
  • the invention is not limited to the embodiments which have just been described by way of example, but covers all variants thereof.
  • the removable nature of the cup 26 as well as its particular shape which have been described are not limiting.
  • the sealing member 60 can be replaced or supplemented by a sealing member carried by the hemispherical end of the end piece 42.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
EP88401009A 1987-04-27 1988-04-25 Verbindungsstück zwischen einer Maschine und einem Lagerfass für feste, in einem Bindemittel eingebettete Teilchen Ceased EP0292344A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8705906A FR2614463B1 (fr) 1987-04-27 1987-04-27 Connecteur pour le raccordement, sur une machine, d'un fut de stockage de particules solides enrobees dans un liant
FR8705906 1987-04-27

Publications (1)

Publication Number Publication Date
EP0292344A1 true EP0292344A1 (de) 1988-11-23

Family

ID=9350504

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88401009A Ceased EP0292344A1 (de) 1987-04-27 1988-04-25 Verbindungsstück zwischen einer Maschine und einem Lagerfass für feste, in einem Bindemittel eingebettete Teilchen

Country Status (2)

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EP (1) EP0292344A1 (de)
FR (1) FR2614463B1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1603729A (en) * 1978-05-23 1981-11-25 B & R Eng Ltd Apparatus and method for treating waste material
EP0143940A1 (de) * 1983-10-28 1985-06-12 Westinghouse Electric Corporation Permanente Auflagerung von spezifischen radioaktiven Abfallstoffen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1603729A (en) * 1978-05-23 1981-11-25 B & R Eng Ltd Apparatus and method for treating waste material
EP0143940A1 (de) * 1983-10-28 1985-06-12 Westinghouse Electric Corporation Permanente Auflagerung von spezifischen radioaktiven Abfallstoffen

Also Published As

Publication number Publication date
FR2614463B1 (fr) 1989-07-13
FR2614463A1 (fr) 1988-10-28

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