WO2009027462A1 - Protection system for glovebox opening - Google Patents

Protection system for glovebox opening Download PDF

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Publication number
WO2009027462A1
WO2009027462A1 PCT/EP2008/061298 EP2008061298W WO2009027462A1 WO 2009027462 A1 WO2009027462 A1 WO 2009027462A1 EP 2008061298 W EP2008061298 W EP 2008061298W WO 2009027462 A1 WO2009027462 A1 WO 2009027462A1
Authority
WO
WIPO (PCT)
Prior art keywords
opening
protection system
glove box
strips
elements
Prior art date
Application number
PCT/EP2008/061298
Other languages
French (fr)
Inventor
Francis Hebuterne
Jean-Paul Mathieu
Original Assignee
Areva Nc
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 Areva Nc filed Critical Areva Nc
Publication of WO2009027462A1 publication Critical patent/WO2009027462A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J21/00—Chambers provided with manipulation devices
    • B25J21/02—Glove-boxes, i.e. chambers in which manipulations are performed by the human hands in gloves built into the chamber walls; Gloves therefor
    • 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
    • G21F7/04—Shielded glove-boxes
    • G21F7/047—Shielded passages; Closing or transferring means between glove-boxes

Definitions

  • the present invention relates to a protection system for opening a glove box containing radioactive elements.
  • FIGS. 1A-1C A first known protection system is shown in FIGS. 1A-1C.
  • FIG. 1A represents a glove box 1 in which there is radioactive material 2.
  • the glove box 1 is provided with an opening 0 on which is fixed a circular ring 4, commonly called a round of glove.
  • a protective glove is attached to the glove ring.
  • Biological shields 3 are placed around the opening 0.
  • Figs. 1B and 1C show, respectively, a sectional view and a front view of the closure system of the glove box shown in Fig. 1A.
  • the closure system comprises a hollow cylindrical cover 6 provided with a flat bottom on which is fixed a protective disk 7.
  • the hollow cylindrical cover 6 is made of aluminum and the protective disk 7 is in gammastop.
  • the hollow cylindrical cowl is adapted to the dimensions of the opening 0 so as to be able to plug in the opening.
  • the protective disc 7 protects the outside of the glove box particles that are emitted by the material 2 located inside the glove box.
  • Such a protection system if effective when the glove box is closed by the hood, is not effective during an intervention. Indeed, during an intervention, it is necessary to remove the cover to be able, after donning the glove g, work in the glove box. No protection is then no longer ensured at the level of the opening 0. Moreover, the obligation that systematically put in place and remove the hood during successive interventions leads to degrade, by friction, the round of glove.
  • the invention relates to a protective system for opening the glove box, characterized in that it comprises a set of parallel flexible strips placed side by side and which form, at the opening, a screen for radiation emitted by a radioactive material placed inside the glove box.
  • the material constituting the straps is gammastop or a material having a high density, consisting of heavy nuclei such as tungsten or lead.
  • the strips are held in a structure consisting of two elements pressurized against each other.
  • the two elements are pressurized against each other by rivets and magnets, the magnets serving to maintain the protection on the glove box.
  • the opening is circular and the two elements are half-rings placed at the periphery of the circular opening.
  • FIG. 1A-1C show a protective structure for opening the glove box according to the prior art
  • FIG. 2 represents a protective structure for opening a glove box according to the invention
  • FIGS. 3A and 3B show the protective structure respectively before and during an intervention.
  • FIG. 2 represents a protective structure for opening a glove box according to the invention.
  • the protective structure comprises a set of flexible strips L and a holding structure 8.
  • the flexible strips L are parallel to each other and located, side by side, at the opening of the glove box.
  • the parallel flexible strips thus form a curtain which shields and protects the outside of the glove box from radioactive radiation emitted by radioactive material contained in the glove box.
  • the strips are arranged in such a way that two adjacent strips overlap over a certain width.
  • the holding structure 8 consists of, for example, two half-rings between which are inserted the strips L. The two half-rings are held against each other, for example using rivets and magnets A.
  • the strips L are preferably made using a material consisting of heavy nuclei (Tungsten, Lead ).
  • tungsten instead of lead avoids the problems that management raises radioactive waste.
  • straps made of a material containing lead such as, for example, gammastop. In the absence of intervention, the strips L form a perfect screen which protects radiation coming from the inside of the glove box.
  • the intervening agent introduces his arm into the glove box through the screen constituted by the strips L. Due to their flexibility, the strips L deform essentially at the arm of the agent , leaving a large part of the screen without deformation. High level protection thus continues to be advantageously ensured.
  • the dose rate measured outside the glove box can thus be reduced by approximately 80% compared to a situation where the glove box is devoid of straps.
  • the protective structure has, for example, a circular geometry as shown in FIG. 2.
  • the overall diameter D of the circle defined by the protective structure is, for example, equal to 30 cm, the strips have a substantially equal width. at 2.5 cm and the magnets are circular magnets of diameter substantially equal to 2 cm.
  • Figures 3A and 3B illustrate the use of the protection system of the invention.
  • Figure 3A illustrates the situation in which the strips constitute a total screen (in case there is no intervention in the glove box).
  • Figure 3B illustrates the situation in which an intervention takes place.

Landscapes

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

Abstract

The invention relates to a protection system for a glovebox opening characterised in that it comprises a maintaining structure (8) and an assembly of parallel flexible straps (L) provided side by side and defining a screen against the radiation emitted by a radioactive material placed inside said glovebox. The invention can be used in any equipment with nuclear risks related to radiation.

Description

SYSTEME DE PROTECTION POUR OUVERTURE DE BOITE A GANT PROTECTION SYSTEM FOR GANTRY BOX OPENING
DESCRIPTIONDESCRIPTION
DOMAINE TECHNIQUE La présente invention concerne un système de protection pour ouverture de boîte à gant contenant des éléments radioactifs.TECHNICAL FIELD The present invention relates to a protection system for opening a glove box containing radioactive elements.
ÉTAT DE LA TECHNIQUE ANTÉRIEURESTATE OF THE PRIOR ART
Différents systèmes de protection pour ouverture de boîte à gant sont connus dans l'art antérieur .Different protection systems for opening the glove box are known in the prior art.
Un premier système de protection connu est représenté sur les figures 1A-1C.A first known protection system is shown in FIGS. 1A-1C.
La figure IA représente une boîte à gant 1 dans laquelle se trouve de la matière radioactive 2. La boîte à gant 1 est munie d'une ouverture 0 sur laquelle est fixée une bague circulaire 4, communément appelée rond de gant. Un gant de protection g est fixé sur le rond de gant. Des écrans de protection biologiques 3 sont placés autour de l'ouverture 0.FIG. 1A represents a glove box 1 in which there is radioactive material 2. The glove box 1 is provided with an opening 0 on which is fixed a circular ring 4, commonly called a round of glove. A protective glove is attached to the glove ring. Biological shields 3 are placed around the opening 0.
Les figures IB et IC représentent, respectivement, une vue en coupe et une vue de face du système de fermeture de la boîte à gant représentée en figure IA. Le système de fermeture comprend un capot cylindrique creux 6 muni d'un fond plat sur lequel est fixé un disque de protection 7. Le capot cylindrique creux 6 est en aluminium et le disque de protection 7 est en gammastop. Le capot cylindrique creux est adapté aux dimensions de l'ouverture 0 de façon à pouvoir s'enficher dans l'ouverture. Lorsque le capot est enfiché dans l'ouverture 0, le disque de protection 7 protège l'extérieur de la boîte à gant des particules qui sont émises par le matériau 2 situé à l'intérieur de la boîte à gant.Figs. 1B and 1C show, respectively, a sectional view and a front view of the closure system of the glove box shown in Fig. 1A. The closure system comprises a hollow cylindrical cover 6 provided with a flat bottom on which is fixed a protective disk 7. The hollow cylindrical cover 6 is made of aluminum and the protective disk 7 is in gammastop. The hollow cylindrical cowl is adapted to the dimensions of the opening 0 so as to be able to plug in the opening. When the cover is plugged into the opening 0, the protective disc 7 protects the outside of the glove box particles that are emitted by the material 2 located inside the glove box.
Un tel système de protection, s'il est efficace lorsque la boîte à gant est fermée par le capot, n'est pas efficace lors d'une intervention. En effet, lors d'une intervention, il est nécessaire de retirer le capot pour pouvoir, après avoir enfilé le gant g, travailler dans la boîte à gant. Aucune protection n'est alors plus assurée au niveau de l'ouverture 0. Par ailleurs, l'obligation qu'il y a de systématiquement mettre en place et retirer le capot lors des interventions successives conduit à dégrader, par frottement, le rond de gant.Such a protection system, if effective when the glove box is closed by the hood, is not effective during an intervention. Indeed, during an intervention, it is necessary to remove the cover to be able, after donning the glove g, work in the glove box. No protection is then no longer ensured at the level of the opening 0. Moreover, the obligation that systematically put in place and remove the hood during successive interventions leads to degrade, by friction, the round of glove.
Un autre système de protection connu est divulgué dans le brevet US 4 251 123. Le système de protection comprend trois volets rigides qui sont fixés par des vis entre deux pièces de maintien. Pour assurer la protection souhaitée, les volets se recouvrent partiellement. Lors d'une intervention, les volets rigides doivent être déplacés, ce qui conduit l'agent qui intervient à ne plus être protégé. L'invention ne présente pas les inconvénients mentionnés ci-dessus.Another known protection system is disclosed in US Pat. No. 4,251,123. The protection system comprises three rigid flaps which are fixed by screws between two holding pieces. To ensure the desired protection, the flaps overlap partially. During an intervention, the rigid flaps must be moved, which leads the agent who intervenes to be no longer protected. The invention does not have the disadvantages mentioned above.
EXPOSÉ DE L'INVENTIONSTATEMENT OF THE INVENTION
En effet, l'invention concerne un système de protection pour ouverture de boîte à gant, caractérisé en ce qu'il comprend un ensemble de lanières souples parallèles placées côte à côte et qui forment, au niveau de l'ouverture, un écran pour des rayonnements émis par un matériau radioactif placé à l'intérieur de la boîte à gant.Indeed, the invention relates to a protective system for opening the glove box, characterized in that it comprises a set of parallel flexible strips placed side by side and which form, at the opening, a screen for radiation emitted by a radioactive material placed inside the glove box.
Selon une caractéristique supplémentaire de l'invention, le matériau qui constitue les lanières est du gammastop ou un matériau ayant une densité élevée, constitué de noyaux lourds comme le tungstène ou le plomb .According to a further feature of the invention, the material constituting the straps is gammastop or a material having a high density, consisting of heavy nuclei such as tungsten or lead.
Selon une autre caractéristique supplémentaire de l'invention, les lanières sont maintenues dans une structure constituée de deux éléments mis en pression l'un contre l'autre.According to another additional feature of the invention, the strips are held in a structure consisting of two elements pressurized against each other.
Selon encore une autre caractéristique supplémentaire de l'invention, les deux éléments sont mis en pression l'un contre l'autre par des rivets et des aimants, les aimants servant à maintenir la protection sur la boîte à gant.According to yet another additional characteristic of the invention, the two elements are pressurized against each other by rivets and magnets, the magnets serving to maintain the protection on the glove box.
Selon encore une autre caractéristique supplémentaire de l'invention, l'ouverture est circulaire et les deux éléments sont des demi-anneaux placés en périphérie de l'ouverture circulaire.According to yet another additional characteristic of the invention, the opening is circular and the two elements are half-rings placed at the periphery of the circular opening.
BRÈVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture d'un mode de réalisation préférentiel fait en référence aux figures jointes parmi lesquelles :Other features and advantages of the invention will appear on reading a preferred embodiment with reference to the appended figures among which:
- les figures 1A-1C représentent une structure de protection pour ouverture de boîte à gant selon l'art antérieur ; - la figure 2 représente une structure de protection pour ouverture de boîte à gant selon 1' invention ;- Figures 1A-1C show a protective structure for opening the glove box according to the prior art; FIG. 2 represents a protective structure for opening a glove box according to the invention;
- les figures 3A et 3B représentent la structure de protection respectivement avant et pendant une intervention.FIGS. 3A and 3B show the protective structure respectively before and during an intervention.
EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PARTICULIERSDETAILED PRESENTATION OF PARTICULAR EMBODIMENTS
Les figures 1A-1C ont été décrites précédemment. Il est donc inutile d'y revenir. La figure 2 représente une structure de protection pour ouverture de boîte à gant selon l'invention. La structure de protection comprend un ensemble de lanières souples L et une structure de maintien 8. Les lanières souples L sont parallèles les unes aux autres et situées, côte à côte, au niveau de l'ouverture de la boîte à gant. Les lanières souples parallèles forment ainsi un rideau qui fait écran et qui protège l'extérieur de la boîte à gant des rayonnements radioactifs émis par de la matière radioactive contenue dans la boîte à gant. Dans un mode de réalisation particulier, les lanières sont disposées de telle sorte que deux lanières voisines se recouvrent sur une certaine largeur. La structure de maintien 8 est constituée, par exemple, de deux demi-anneaux entre lesquels sont insérées les lanières L. Les deux demi- anneaux sont maintenus l'un contre l'autre, par exemple à l'aide de rivets et d'aimants A. Les lanières L sont préférentiellement réalisées à l'aide d'un matériau constitué d'atomes de noyaux lourds (Tungstène, Plomb...) . L'utilisation du tungstène à la place du plomb permet d'éviter les problèmes que soulève la gestion des déchets radioactifs. Il est toutefois possible, dans le cadre de l'invention, d'utiliser des lanières faites en un matériau contenant du plomb tel que, par exemple, le gammastop. En l'absence d'intervention, les lanières L forment un écran parfait qui protège des rayonnements provenant de l'intérieur de la boîte à gant.Figures 1A-1C have been previously described. It is therefore useless to return to it. FIG. 2 represents a protective structure for opening a glove box according to the invention. The protective structure comprises a set of flexible strips L and a holding structure 8. The flexible strips L are parallel to each other and located, side by side, at the opening of the glove box. The parallel flexible strips thus form a curtain which shields and protects the outside of the glove box from radioactive radiation emitted by radioactive material contained in the glove box. In a particular embodiment, the strips are arranged in such a way that two adjacent strips overlap over a certain width. The holding structure 8 consists of, for example, two half-rings between which are inserted the strips L. The two half-rings are held against each other, for example using rivets and magnets A. The strips L are preferably made using a material consisting of heavy nuclei (Tungsten, Lead ...). The use of tungsten instead of lead avoids the problems that management raises radioactive waste. However, it is possible in the context of the invention to use straps made of a material containing lead such as, for example, gammastop. In the absence of intervention, the strips L form a perfect screen which protects radiation coming from the inside of the glove box.
Lors d'une intervention, l'agent qui intervient introduit son bras dans la boîte à gant à travers l'écran que constituent les lanières L. Du fait de leur souplesse, les lanières L se déforment essentiellement au niveau du bras de l'agent, laissant une grande partie de l'écran sans déformation. Une protection de niveau élevée continue ainsi avantageusement à être assurée. Le débit de dose mesuré à l'extérieur de la boîte à gant peut ainsi être diminué sensiblement de 80% par rapport à une situation où la boîte à gant serait dépourvue de lanières.During an intervention, the intervening agent introduces his arm into the glove box through the screen constituted by the strips L. Due to their flexibility, the strips L deform essentially at the arm of the agent , leaving a large part of the screen without deformation. High level protection thus continues to be advantageously ensured. The dose rate measured outside the glove box can thus be reduced by approximately 80% compared to a situation where the glove box is devoid of straps.
Le maintien des lanières par deux demi- anneaux maintenus l'un contre l'autre à l'aide de rivets et d'aimants permet de changer facilement, lorsque cela s'avère nécessaire, une ou plusieurs lanières .Maintaining the strips by two half-rings held against each other by means of rivets and magnets makes it easy to change, when necessary, one or more strips.
La structure de protection a, par exemple, une géométrie circulaire comme cela est représenté en figure 2. Le diamètre hors-tout D du cercle que définit la structure de protection est, par exemple, égal à 30cm, les lanières ont une largeur sensiblement égale à 2,5cm et les aimants sont des aimants circulaires de diamètre sensiblement égal à 2cm. Les figures 3A et 3B illustrent l'utilisation du système de protection de l'invention. La figure 3A illustre la situation dans laquelle les lanières constituent un écran total (cas où il n'y a pas d'intervention dans la boîte à gant) . La figure 3B illustre la situation dans laquelle une intervention a lieu . The protective structure has, for example, a circular geometry as shown in FIG. 2. The overall diameter D of the circle defined by the protective structure is, for example, equal to 30 cm, the strips have a substantially equal width. at 2.5 cm and the magnets are circular magnets of diameter substantially equal to 2 cm. Figures 3A and 3B illustrate the use of the protection system of the invention. Figure 3A illustrates the situation in which the strips constitute a total screen (in case there is no intervention in the glove box). Figure 3B illustrates the situation in which an intervention takes place.

Claims

REVENDICATIONS
1. Système de protection pour ouverture de boîte à gant, caractérisé en ce qu'il comprend un ensemble de lanières souples (L) parallèles placées côte à côte au niveau de l'ouverture et qui forment un écran pour des rayonnements émis par un matériau radioactif placé à l'intérieur de la boîte à gant.1. Protective system for opening the glove box, characterized in that it comprises a set of parallel flexible strips (L) placed side by side at the opening and which form a screen for radiation emitted by a material radioactive material placed inside the glove box.
2. Système de protection selon la revendication 1, dans lequel le matériau qui constitue les lanières est du gammastop ou un matériau ayant une densité élevée constitué de noyaux lourds.2. Protection system according to claim 1, wherein the material constituting the straps is gammastop or a material having a high density consisting of heavy nuclei.
3. Système selon la revendication 2, dans lequel le matériau ayant une densité élevée constitué de noyaux lourds est du tungstène ou du plomb.The system of claim 2, wherein the material having a high density of heavy cores is tungsten or lead.
4. Système de protection selon l'une quelconque des revendications 1 à 3, dans lequel les lanières souples (L) sont maintenues dans une structure constituée de deux éléments mis en pression l'un contre 1' autre .4. Protection system according to any one of claims 1 to 3, wherein the flexible straps (L) are held in a structure consisting of two elements pressurized against each other.
5. Système de protection selon la revendication 4, dans lequel les deux éléments sont mis en pression l'un contre l'autre par des rivets et des aimants (A) .5. Protection system according to claim 4, wherein the two elements are pressurized against each other by rivets and magnets (A).
6. Système de protection selon la revendication 4 ou 5, dans lequel l'ouverture est circulaire et les deux éléments sont des demi-anneaux placés en périphérie de l'ouverture circulaire. The protection system according to claim 4 or 5, wherein the opening is circular and the two elements are half-rings placed on the periphery of the circular opening.
PCT/EP2008/061298 2007-08-31 2008-08-28 Protection system for glovebox opening WO2009027462A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0757299A FR2920334B1 (en) 2007-08-31 2007-08-31 PROTECTION SYSTEM FOR GANTRY BOX OPENING
FR07/57299 2007-08-31

Publications (1)

Publication Number Publication Date
WO2009027462A1 true WO2009027462A1 (en) 2009-03-05

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3002362A1 (en) 2013-02-21 2014-08-22 Commissariat Energie Atomique IONIZING RADIATION PROTECTION DEVICE AND CONFINEMENT ENCLOSURE EQUIPPED WITH SUCH A DEVICE

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2699826A (en) * 1952-03-29 1955-01-18 John H Emerson Armhole closure for incubators for infants
US3450450A (en) * 1966-03-11 1969-06-17 Nat Res Dev Pressure resisting seal
GB1455863A (en) * 1973-11-09 1976-11-17 British Nuclear Fuels Ltd Glove boxes
US4251123A (en) * 1979-05-04 1981-02-17 The United States Of America As Represented By The United States Department Of Energy Glove box shield
FR2590198A1 (en) * 1985-11-20 1987-05-22 Elastotecnnic Shutter device for glove box
FR2642221A1 (en) * 1989-01-25 1990-07-27 Doryokuro Kakunenryo Protective bung for a glove box orifice
US5008515A (en) * 1990-05-10 1991-04-16 Mccormack William C Body temperature responsive transport warming blanket
EP0749743A2 (en) * 1995-06-20 1996-12-27 Ohmeda Inc. Magnetic door seal for infant incubator
US6264055B1 (en) * 2000-02-28 2001-07-24 The United States Of America As Represented By The United States Department Of Energy Containment canister for capturing hazardous waste debris during piping modifications

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2699826A (en) * 1952-03-29 1955-01-18 John H Emerson Armhole closure for incubators for infants
US3450450A (en) * 1966-03-11 1969-06-17 Nat Res Dev Pressure resisting seal
GB1455863A (en) * 1973-11-09 1976-11-17 British Nuclear Fuels Ltd Glove boxes
US4251123A (en) * 1979-05-04 1981-02-17 The United States Of America As Represented By The United States Department Of Energy Glove box shield
FR2590198A1 (en) * 1985-11-20 1987-05-22 Elastotecnnic Shutter device for glove box
FR2642221A1 (en) * 1989-01-25 1990-07-27 Doryokuro Kakunenryo Protective bung for a glove box orifice
US5008515A (en) * 1990-05-10 1991-04-16 Mccormack William C Body temperature responsive transport warming blanket
EP0749743A2 (en) * 1995-06-20 1996-12-27 Ohmeda Inc. Magnetic door seal for infant incubator
US6264055B1 (en) * 2000-02-28 2001-07-24 The United States Of America As Represented By The United States Department Of Energy Containment canister for capturing hazardous waste debris during piping modifications

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FR2920334A1 (en) 2009-03-06

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