EP2515311B1 - A protective and disposable intervention envelope shaped tent - Google Patents

A protective and disposable intervention envelope shaped tent Download PDF

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Publication number
EP2515311B1
EP2515311B1 EP12164839.8A EP12164839A EP2515311B1 EP 2515311 B1 EP2515311 B1 EP 2515311B1 EP 12164839 A EP12164839 A EP 12164839A EP 2515311 B1 EP2515311 B1 EP 2515311B1
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EP
European Patent Office
Prior art keywords
sheet
envelope
tent
closure member
protective
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.)
Not-in-force
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EP12164839.8A
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German (de)
English (en)
French (fr)
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EP2515311A2 (en
EP2515311A3 (en
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Belgonucleaire SA
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Belgonucleaire SA
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Priority to EP12164839.8A priority Critical patent/EP2515311B1/en
Publication of EP2515311A2 publication Critical patent/EP2515311A2/en
Publication of EP2515311A3 publication Critical patent/EP2515311A3/en
Application granted granted Critical
Publication of EP2515311B1 publication Critical patent/EP2515311B1/en
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F7/00—Shielded cells or rooms
    • G21F7/04—Shielded glove-boxes
    • G21F7/045—Transportable glove-boxes
    • 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
    • G21F3/00—Shielding characterised by its physical form, e.g. granules, or shape of the material
    • 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
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D1/00—Details of nuclear power plant
    • G21D1/003—Nuclear facilities decommissioning arrangements

Definitions

  • the present invention relates to a protective and disposable intervention envelope shaped tent, in particular for intervention on contaminated objects, said tent being leak tight and comprising at least a first flexible flat sheet and a second flexible flat sheet, said tent further comprises at least one first mechanically resistant and re-usable closure member, having a first and a second part, said first part being attached to said first sheet and said second part being attached to said second sheet, said first closure member being provided to attach and detach said first and second flexible sheet to each other, said tent further comprising at least one second leak tight and re-usable closure member comprising a first flap connected in a leak tight manner to said first sheet and a second flap connected in a leak tight manner to said second sheet, said first and second flap being provided to be leak-tightly attached to each other by a leak tight seal and being applied in such a manner that said first and second closure members extend substantially parallel to each other so as to overlap said first mechanical closure member when said first and second flaps and sheets are attached to each other.
  • the present invention also relates to
  • Such a protective and disposable intervention envelope shaped tent is known from US-PS 5 062 186 .
  • dismantling nuclear installations such as for instance, mixed oxide ('MOX') and other Plutonium-bearing fuel rod production lines
  • 'MOX' mixed oxide
  • other Plutonium-bearing fuel rod production lines one of the main issues is that of dismantling enclosures the interior of which has become contaminated with radioactive materials, without releasing this radioactive contamination.
  • Several methods have been proposed for dismantling nuclear contaminated enclosures. So for example glove boxes are used, as this type of enclosures is the most widely used, but of course other types of nuclear enclosures can be used for this purpose.
  • the glove box is transported to a dismantling alpha-tight cell located inside the operation facility.
  • the alpha-tight cell contains all cutting equipment necessary to perform the necessary dismantling operations under leak-tightness towards the external environment. Actuation of the dismantling tools is performed by operators who are standing inside the alpha-tight cell. These operators are equipped with special leak tight clothes and respiratory devices that enable them to operate in the inner environment of the leak tight room. Entrance and exit of the operators are foreseen through adapted airlocks. The removal of the waste pieces resulting from the cutting operations is realised by using waste drums connected to the tight cell.
  • a cutting box is a dedicated glove box containing cutting equipment for realising the dismantling operations while remaining isolated from the external environment.
  • the cutting box is equipped with glove ports and windows and is maintained at an under pressure by its own ventilation system. Actuation of the dismantling tools is performed by operators who are standing outside the cutting box. These operators are equipped with equipment and monitoring devices similar to those worn while operating on a glove box. Entrance to the cutting box where the glove box to be dismantled is placed, occurs by using a conventional bag -in technique, with however very large bags.
  • the latter technique enables to maintain the confinement of the enclosure while introducing equipment or other material.
  • the equipment or the material is placed in a bag on which opening side there is provided an O-ring.
  • the latter is than fixed inside a groove applied on a periphery of an access port of the enclosure in such a manner as to overlap a further bag already present on the access port and closing the latter.
  • For entering the equipment or the material the latter is pulled with the bag inside the enclosure. Once the equipment or the material is inside, the access port is closed by the bag in which the equipment or the material was stored.
  • waste drums docked to the cutting box The removal of the waste pieces resulting from the cutting operation is ensured by waste drums docked to the cutting box.
  • light master-slave arms and tongs can be used on the cutting box in order to extend the working range and reduce the exposure of the operator to radiation. Comparable safety and containment issues are met when performing heavy maintenance on contaminated process enclosures.
  • the glove box is transported to a protective tent located inside the glove box operation facility, or the protective tent is erected in situ around the glove box.
  • the protective tent is disposable and comprises a flexible, leak tight envelope tailored to the shape and dimensions of the glove box to be dismantled and attached to an outer metallic support to prevent from collapsing when under pressurized.
  • the protective tent may be equipped with gloves, glove ports and windows and maintained at an under pressure by its own ventilation system. What is understood within the context of the present invention by "under pressure", is a pressure significantly lower than that of the surrounding atmosphere.
  • the tent may contain cutting equipment (saws, nibblers, ...) for performing dismantling operations in isolation from the external environment.
  • Actuation of the dismantling tools is performed by operators who are standing outside the dismantling tent. These operators may be equipped with equipment and monitoring devices similar to those used while operating a process glove box. Waste resulting from the cutting operations may be evacuated by conventional bag-out techniques through access ports or to waste drums docked to the protective tent in a leak tight manner. A bag-out technique being similar to a bag-in technique with the difference however that now material is brought out the glove box rather than brought in.
  • tents are prefabricated according to quality control programs and heavy welding machines with process control are used in specialised manufacturing workshops. Overall tightness and resistance to accidental under pressure are tested on the final product before delivery to the dismantling plants.
  • the envelope has to be open at first and then closed and the leak-tightness measured again once the contaminated glove box is inside.
  • the glove box has a complex shape, it will be necessary to give a complex shape to the leak tight envelope too and therefore to join adjacent flexible sheets at intersecting angles, while ensuring their leak-tightness. Moreover, if the glove box has large dimensions, it will be necessary to tailor the leak tight envelope in different parts for purpose of manufacturing and transportation in non-contaminated conditions and ultimate disposal once the interior of this envelope has been irreversibly contaminated.
  • a protective and disposable intervention envelope shaped tent is characterised in that said first, respectively second part of said first closure member are attached at a lateral border of said first, respectively said second sheet, said tent further comprising at least a third flexible flat sheet, said first closure member further comprising a third respectively a fourth part attached to a transversal edge of said first or second sheet, respectively a transversal edge of said third sheet and provided to attach and detach either said first or second flexible sheet to said third sheet by means of said third and fourth part, said second closure member comprising a third, respectively a fourth flap connected in a leak tight manner to said transversal edge of said third sheet, respectively said first or second sheet, said first, second, third and fourth flap being provided to be leak-tightly attached to each other by a leak tight seal applied on said first, second, third and fourth flap, said first, second and third sheets being each time positioned adjacent to each other, in such a manner as to have a combination of at least one substantially horizontally and at least one substantially vertical
  • a first preferred embodiment of a protective and disposable intervention envelope shaped tent is characterised in that said flaps extend beyond a surface over which their respective sheet, to which they are attached, extends.
  • T or other shaped juxtapositions of the first, second, third a fourth parts of the first closure member can be used. Indeed, as the flaps extend beyond the surface of their respective sheet, an overlap is also possible beyond the surface of the adjacent sheets, which improves the leak-tightness of the tent.
  • a second preferred embodiment of a protective and disposable intervention envelope shaped tent is characterised in that said tent further comprises a plurality of third mechanically resistant and re-usable closure members, each third closure member comprising a first closure element connected to said first sheet and a second closure element connected to said second sheet, said first and second closure element being complementary to each other so as to form, when in closed state, an additional attachment of said first and second flexible sheets and to bridge said at least one first mechanical closure member when the latter is in closed state.
  • the use of a third closure member enables to improve the attachment of the sheets among them. As the third closure member bridges the first closure member, a possible defect of the first closure member will be compensated by the third closure member.
  • Figure 1 shows the protective and disposable intervention envelope shaped tent 1 according to the present invention and covering a glove box 2 (showed in dotted lines) to be dismantled.
  • a protective tent for dismantling a glove box. It will however be clear that the invention is not limited to this example and that the tent can be used for intervention on all kind of contaminated objects.
  • the protective tent 1 comprises a leak tight envelope 3 for creating a leak tight environment, which is necessary because the risk of contamination is minimised during interventions inside the glove box.
  • the leak-tightness of the protective tent is ensured by the use of leak tight closure members which provide a leak tight seal between the different sheets 20 and 21 forming the envelope shaped tent.
  • the protective tent 1 comprises a leak tight port 7 e.g. airlocks, which allow transporting materials in and/or out of the envelope shaped tent without breaching its leak-tightness.
  • devices needed for assistance during manipulations such as equipment, tools, electrical power outlets, monitoring devices, incident fighting equipment, a robotic arm, for example for remote controlled operation or ventilation pipes etc. can be brought into the leak tight tent in a leak tight manner. Actuation of the dismantling tools is performed by operators who are standing outside the protective tent. These operators may be equipped with tools and monitoring devices similar to those used while operating a process glove box.
  • a waste container 8 is coupled to the leak tight tent in a leak tight manner for the evacuation of waste, e.g. resulting from a dismantling operation.
  • the protective tent 1 also preferably comprises at least one leak tight window 9 allowing for light to penetrate into the tent and to see inside the tent.
  • the protective tent further comprises at least one glove port 11 applied in the material of which the tent is made.
  • one or more gloves e.g. one or more pairs of gloves, are attached to the glove ports in a leak tight manner to enable manual acts inside the envelope.
  • the protective tent 1 further preferably comprises at least one ventilation piping 50, as shown in figure 8 , connected to a ventilation system (not shown) to enable ventilation and the creation of a vacuum inside the envelope 3.
  • a ventilation system not shown
  • vacuum is pressure which is in particular 100 to 200 Pa lower than that of the surrounding atmosphere. Ventilation is typically performed at appropriate flows e.g. 60 m 3 /h to minimise the release of nuclear contamination even in case of significant mechanical damage.
  • the tent is typically maintained under vacuum (100-200 Pa) to further prevent incidental release of contamination in case of mechanical damage to the tent 3 caused by e.g. the dismantled parts or the dismantling equipment.
  • the envelope's resistance Prior to dismantling the glove box, the envelope's resistance is preferably tested by applying a stronger vacuum, e.g. twice the operational vacuum.
  • a stronger vacuum e.g. twice the operational vacuum.
  • resistance is structural resistance of the tent and the welding or seams between the constituent flexible sheets, efforts due to vacuum and other operational efforts originating from the operator handling parts and actuating tools after the tent has been attached to the metallic support 6.
  • the envelope is typically made of flexible canvas material, such as woven or non-woven polymeric flexible sheets, for example woven polyethersulfone (PES) foil.
  • the flexible sheets may be coated on one or both sides, e.g. with polyvinylchloride (PVC), which provides structural resistance and facilitates the welding and/or gluing of the sheets during manufacturing of the envelope.
  • PVC polyvinylchloride
  • FIG. 2 shows a cross-section through the tent of figure 1 .
  • the envelope comprises a first 20 and a second 21 flexible flat sheet, which are attached to each other.
  • a tent comprising only two sheets is illustrated, but it will be clear that the invention is not limited to tents of which the envelope is made of only two sheets and that a plurality of sheets can be used to form the tent.
  • the first sheet forms the bottom part of the tent, whereas the second sheet forms the upper part of the tent.
  • At least one first mechanically resistant and re-usable closure member 22 is provided.
  • mechanically resistant there is meant a closure member that is resistant against a force of at least 50N.
  • re-usable there is generally meant that the closure member must enable a plurality of attachments and dissociations of the first and second sheet.
  • the first closure member 22 comprises a first 23 and a second 24 part.
  • the first part 23 is attached to the first sheet 20, whereas the second part is attached to the second sheet 21.
  • the first closure member is formed by a zip fastener which is preferably stitched on the sheet.
  • a hook and loop attachment member such as a Velcro (®) could be used.
  • stitching the first closure member on the sheet a gluing of the first and second part to the respective sheets could be done.
  • the first and the second part of the first closure member are complementary to each other in such a manner as to enable attachment of the first 20 and the second sheet 21 to each other. So, when the first closure member is formed by a zip fastener it will be sufficient to close the latter for attaching the first and the second sheet to each other.
  • the first closure member is preferably applied along a lateral and/or a transversal border of the sheet.
  • the first closure member however only provides a mechanical resistant and re-usable closure member for attaching the first and second sheet to each other.
  • the first closure member is re-usable because it enables to open and close it several times by handling for example the zip fastener or the loop and hook attachment member.
  • At least one second leak tight and re-usable closure member comprises a first flap 25 connected in a leak tight manner to the first sheet 20 and a second flap 26 connected in a leak tight manner to the second sheet 21.
  • the connection in a leak tight manner of the flaps to the sheets is for example realised by welding or gluing the flaps to their respective sheet.
  • an edge 27, 28 of the flap is welded or glued offset the part of the sheet where the first closure members 23, 24 are applied.
  • the flaps extend substantially in parallel to the first closure member and to each other.
  • the first 25 and the second 26 flaps are further provided to be leak-tightly attached to each other by a leak tight seal, preferably applied along their further edges 29 and 30.
  • first flap 25 and the second flap 26 are brought together so as to overlap the first closure member.
  • the flaps are thereafter welded or glued together, preferably along their edges 29 and 30.
  • the flaps are preferably made of Polyvinylchloride. In such a manner a leak tight closure between the first and second sheet is obtained.
  • the envelope is further provided with a plurality of third closure members 31 which are mechanically resistant and re-usable.
  • Each third closure member 31 comprises a first closure element 31-1 connected to the first sheet 20 and a second closure element 31-2 connected to the second sheet 21.
  • the first and the second closure element are complementary to each other so as to form, when in a closed state, an additional attachment of the first and second flexible sheets.
  • the third closure members each time bridge the first mechanical closure member 22 when both are in closed state.
  • the third closure member is for example formed by a buckle the elements of which are clipsed together.
  • the third closure members are applied in the space covered by the second closure member so as not to affect the leak tightness.
  • the first and second closure elements are preferably stitched on the sheet to which they are applied. The presence of the third closure members improves the mechanical attachment between the first and second sheet.
  • Figure 4a and b illustrate the attachment of three and four different sheets to each other by means of the closure members.
  • a third sheet 32 is attached to the first 20 and to the second 21 sheet.
  • the first closure member 22 the second flaps 25 and 26 and the third 31 closure member extend in a substantially horizontal direction
  • the closure members extend in a substantially vertical direction.
  • the first 23, respectively the second 24, part of the first closure member 22 are attached to a lateral border of all the sheets and extend in a substantially horizontal direction.
  • the first closure number further comprises a third 35, respectively a fourth 36 part attached to a transversal border of the first 20 and third 32 sheet, respectively to a transversal of the fourth 33 and fifth 34 sheet.
  • the third 35 and fourth 36 parts are provided to attach and detach the first and the third and the and the fourth and the fifth sheet to each other in a transversal direction.
  • the third and fourth part of the first closure member are, analogous to the first and second part, preferably either stitched on or glued to their respective sheet and are formed by a zip fastener or a loop and hook attachment member.
  • the second closure member further comprises a third 37 respectively a fourth 38 flap connected in a leak tight manner to the first 20 and third 32 sheet, respectively of the fourth 33 and fifth 34 sheet.
  • the flaps extend along a transversal edge of the sheets to which they are applied. Preferably, the flaps extend beyond the surface over which their respective sheet, to which they are attached, extends. As will be described hereinafter this will enable a leak tight attachment over the corner pieces of the different sheets attached to each other for forming the tent.
  • the third 37 and the fourth 38 flaps are, just like the first and the second flap, provided to be leak-tightly attached to each other by a leak tight seal.
  • the third, fourth and fifth sheets are also preferably provided with the third closure members 31, which extend in a substantially horizontal as well as in a vertical direction.
  • the first and second sheet are for example first attached to each other by bringing the first part 23 of the first closure member on the first sheet and the second part 24 of the first closure member on the second sheet 21 towards each other. Then the first and second parts of the first closure member are attached to each other, thereby attaching the first and second sheet to each other. Thereafter the third sheet 32 is placed next to the first and second sheet in such a manner that the first part 23 of the first closure member on the third sheet extends next to the second part 24 of the first closure member on the second sheet 21. Thereafter the first and second parts are attached to each other for example by activating the zip fastener, as illustrated in figure 5a .
  • the attachment of the third sheet to the second sheet has caused the third 35 and fourth 36 part of the first closure member to extend next to each other, thereby enabling to attach them to each other so that the third 32 and first 20 sheets are now attached to each other. Thereafter, if present, the third closure members 31 are closed in order to improve the attachment between the first, the second and third sheets, as shown in figure 5b .
  • the flaps of the second closure member will be attached together, as shown in all the figures 5 . It is for example started by bringing the third 37 and the fourth 38 flap towards each other so that their respective edges 40 and 41 contact each other. A welding is then for example applied along the edges 40 and 41. If the third and fourth flaps extend beyond the transversal edges of the first and third sheet, the applied welding also extends beyond those edges so that the flaps are welded over their total length. In the section extending beyond the transversal edge of the first and third sheet, the flaps are even welded on both their lateral edges on their transversal edges so as to obtain closed sealing over the whole peripheral of the flaps.
  • first flap 25 of the third sheet 32 and the second flap of the second sheet 21 are brought together so that their edges contact each other.
  • a welding is then applied along the edge 29 of the first flap 25 of the third sheet 32 and that section of the second flap 26 of the second sheet 21 which extends in parallel with the latter first flap. Again the welding extends over the whole length of the considered flap section.
  • first 25 flap of the first sheet 20 and the second flap 26 of the second sheet are welded together in a similar way as the one of the third and second sheet.
  • the sections of the third 37 and the fourth 38 flap which extend over the first 25 and 26 second flap of the first, third and second sheet are then welded together by applying for example a welding between an upper edge of the first flap 25 of the third sheet and the fourth flap and a lower edge section of the first flap of the third sheet and the fourth flap. Another welding is then applied between the latter lower edge section and an edge section of the first and second flap of the first and second sheet. Finally the transversal edges of the first and second flaps are welded together. In such of manner a leak tight closure is obtained. Any leakage which could arise through the first closure member would remain trapped in the volume delimited by the flaps. As the latter are welded over the lateral and transversal edges, a leak tight enclosure is obtained, which avoids any leakage out of the envelope to reach the outside world.
  • the connection between the four sheets illustrated in figure 4b is realised in an analogous manner as the one which has been described with respect to figure 4a and will therefore not be described in more detail.
  • the leak tight closure member of the protective tent of the present invention could also comprise other closure members.
  • other types of first mechanical closure members could be used such as pressure buttons. They could alternatively be attached by stapling or riveting.
  • FIGs 6a and b show a large protective tent provided for dismantling a large or a complex glove box which is not transportable.
  • the tent 3 comprises a plurality of adjacently applied flexible sheets.
  • one or more flexible sheets 21 are provided at the bottom of the tent.
  • the dividing of an extra-long envelope into two normally long envelope parts facilitates the fabrication and transportation, the erection around a long and not transportable glove box, as well as the ultimate disposal by successive wrapping and shredding.
  • Figure 6a shows a protective tent 1 has a rectangular parallelepiped geometry.
  • the protective tent 1 of the present invention can cover a wide variety of shapes and sizes and can be tailed to complex shapes, so as to cover glove boxes of large or complex shape. This is possible because the flexible sheets whereof the envelope 3 is made can be attached to each other in a leak tight way by the leak tight closures members as described here before.
  • Figure 6b shows a protective tent 1 having a multiple rectangular parallelepiped geometry, i.e. an arrangement of more than one parallelepiped geometry. Again, leak-tightness of this complex shaped tent is achieved because the flexible sheets of the envelope 3 can be attached to each other in a leak tight way by the leak tight closure members.
  • the closure members may comprise an arrangement of straight or curved segments.
  • One straight or curved segment is positioned next to another straight or curved segment whereby the last one abuts to the first one, so as to provide a continuous leak tight closure.
  • Figure 7 illustrates a method for testing the leak-tightness of the envelope once assembled. Since preserving the leak-tightness of the protective tent is very important, leak-tightness is typically measured preferably after mounting and further more at several occasions during its lifetime. For example, leak-tightness is measured after a glove box has been introduced into the tent. In order to be able to introduce the glove box into the tent 1 for dismantling purposes, the envelope has to be opened at first, and then closed and the teak-tightness measured again once the contaminated glove box is inside. Before proceeding with dismantling the glove box within the envelope, it will normally be necessary to test the leak-tightness of the latter.
  • Leak tightness is also assessed after manufacturing the envelope shaped tent.
  • tents are prefabricated - preferably as parallepipeds - thereby applying quality insurance programs.
  • Heavy welding machines with process control e.g. high frequency or resistance welding machined
  • Overall tightness under normal conditions and overall resistance to accidental conditions are tested on the final product before delivery to the dismantling works, to demonstrate the reliability of the welding. These tests are performed by putting the empty and non contaminated envelope under normal and accidental vacuum (for instance, twice the normal vacuum). The tightness is measured using the method of pressure increase.
  • the method for testing the leak-tightness of the intervention tent of the present invention comprises the steps of:
  • a leakage of the envelope 3 can be determined by measuring either an air flow coming out of the envelope or concentration of tracer gas in the outer disposable enclosure 45.
  • the tracer gas is for example chosen from CO 2 , SF 6 or refrigerant gases.
  • this detection and/or measurement may be carried out using a tracer gas sensor connected to a ventilation system of the tent.
  • the inside of the envelope also presents a vacuum with respect to the outer world.
  • the leak-tightness of the enclosure is measured by the concentration of gas within the nuclear enclosure, which is a straightforward measurement applying a common tracer gas sensor within the enclosure.
  • a vacuum By applying a vacuum, the leakage of radioactive substance from the envelope is prevented.
  • this also contributes to the accuracy of the method, as the tracer gas leaked into the envelope is prevented from re-exiting it and measurement errors are thus reduced.
  • the total gas pressure in the outer enclosure 45 may be lower than the total gas pressure outside the outer enclosure. This reduces the risk of the test gas escaping from the outer enclosure, which is particularly beneficial when the tracer gas is not entirely innocuous.
  • testing the leak-tightness with a vacuum in the outer enclosure is a measure for safe and accurate performance. Indeed, gases and substances carried by gasses, such as hazardous substances, are prevented from escaping the enclosure by providing a vacuum inside its leak tight envelope, which also contributes to more accurate gas measurements.
  • the leak-tightness has to be checked again for safety purpose.
  • checking the leak-tightness will be preferably performed with one tracing gas method, according to ISO 10648-2 method.
  • one tracing gas method according to ISO 10648-2 method.
  • CO 2 , SF 6 and refrigerant gases refrigerant gases
  • a temporary envelope is preferably built around the protective tent envelope and specially the re-usable joints to limit the used quantity of tracing gas.
  • a cascade of vacuum P glove box ⁇ p tent envelope ⁇ P temporary envelope ⁇ P workshop
  • P glove box ⁇ p tent envelope ⁇ P temporary envelope ⁇ P workshop will be temporarily organised with the respective ventilation and filtration systems so as to avoid contaminating the envelope too early and to protect the operator against too early incidental contamination of the envelope and against inhalation of the toxic tracing gas.
  • Leaking rate of the tent envelope will be assessed, by measuring air flow and tracing gas concentrations in test enclosure, tent envelope and glove box, according to formulas given in the standard ISO 10648-2.
  • this temporary envelope is large enough to receive operators, and that an appropriate ventilation and filtration is foreseen, this latter envelope can also be used as an additional nuclear containment system ("third barrier") to limit spreading of contamination in the workshops in case of an incidental contamination during the dismantling or maintenance works (e.g. pinhole in a glove).
  • third barrier additional nuclear containment system
  • the tent according to the present invention has been built up by attaching the different sheets to each other using the closure members, and once the leak-tightness has been tested, the tent can be used for interventions on contaminated objects.
  • the closure members are all re-usable, it is possible to demount the tent, in as far as the tent has not been contaminated during the intervention, which occurred inside the tent.
  • the flaps are opened by for example cutting away the applied welds or the applied glue stripes. In such a manner access is provided again to the first and if present, also the third closure members, which can be opened.
  • the flaps initially have a sufficient width of for example 50 cm in order to enable several uses including a mounting and demounting of the tent.
  • the tent can be used several times for intervention on contaminated objects, at one time during its lifetime the tent will reach the end of its lifecycle, either because the tent is damaged or broken because the tent is too much contaminated.
  • the tent has to be discarded and stored in a safe manner.
  • the inner walls of the envelope are coated with a spray in order to have contaminated particles adhering as much as possible to the inner wall of the envelope. In such a manner a secondary nuclear or other contaminated waste is obtained.
  • the material of which the envelope is made is combustible and may comprise halogens, it can be stored in a drum.
  • the envelope has to be folded up so as to enable storage in the drum.
  • the envelope can either be directly stored inside the drum, or after having been cut into smaller pieces.
  • Figure 8 illustrates the different steps of a method for storing the protective and disposable intervention envelope 3 according to the present invention.
  • the envelope 3 is connected via its outlet 50 to an air pumping device (not shown).
  • the envelope is detached from its support structure and falls down on the ground due to gravity.
  • the air pumping device remains attached to the outlet 50 while detaching the envelope and also when the envelope falls on the ground.
  • the envelope By falling on the ground, the envelope collapses as if to say and can be folded together to obtain a packed up structure. Also during this folding up, the pumping device remains active. The folded up envelope is thereafter wrapped in order to form a wrapped envelope, whilst still continuing to pump air and gases out of the inner body of the envelope. Once the envelope is wrapped up, the pumping device is disconnected from the envelope and the latter is thereafter shifted inside a primary tube 53. Once the envelope is inside the primary tube, the latter is sealed by applying seals 51 and 52 on both ends of the primary tube.
  • the primary tube is preferably made of polyvinylchloride (PVC).
  • each section is connected to the pumping device.
  • the sections are, before being folded, separated from each other by applying a cutting through the flaps and opening the first and if necessary the third closure members. In such a manner the sections can be dealt with separately as if they were individual envelopes.
  • the secondary tube 56 is preferably made of polyurethane and provided at its entrance opening with an O-ring 54. This enables to attach the secondary tube and its content to a glove box input where the envelope and the primary and secondary tubes can be discarded.
  • the use of an O-ring enables a substantially leak-free connection of the secondary tube to the glove box.
  • Figure 11 illustrates a similar method as the one described with figure 10 .
  • the method of figure 11 distinguishes over the one of figure 10 in that no secondary tube is used.
  • the envelope wrapped into the primary tube is directly stored into the drum 57.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Manipulator (AREA)
  • Tents Or Canopies (AREA)
  • Examining Or Testing Airtightness (AREA)
EP12164839.8A 2011-04-19 2012-04-19 A protective and disposable intervention envelope shaped tent Not-in-force EP2515311B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12164839.8A EP2515311B1 (en) 2011-04-19 2012-04-19 A protective and disposable intervention envelope shaped tent

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11163094 2011-04-19
EP12164839.8A EP2515311B1 (en) 2011-04-19 2012-04-19 A protective and disposable intervention envelope shaped tent

Publications (3)

Publication Number Publication Date
EP2515311A2 EP2515311A2 (en) 2012-10-24
EP2515311A3 EP2515311A3 (en) 2014-03-05
EP2515311B1 true EP2515311B1 (en) 2015-07-22

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EP12164839.8A Not-in-force EP2515311B1 (en) 2011-04-19 2012-04-19 A protective and disposable intervention envelope shaped tent

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EP (1) EP2515311B1 (zh)
JP (1) JP6079984B2 (zh)
CN (1) CN102852375B (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9302294B2 (en) 2013-08-02 2016-04-05 Babcock Noell Gmbh Separating radioactive contaminated materials from cleared materials resulting from decommissioning a power plant

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2089424A (en) * 1980-12-12 1982-06-23 Strentex Fabrics Ltd Covered sliding fastener
GB2106160A (en) * 1981-09-22 1983-04-07 Airborne Ind Collapsible anti contamination shelter
US4914793A (en) * 1987-11-09 1990-04-10 The United States Of America As Represented By The United States Department Of Energy Quick-sealing design for radiological containment
US5062186A (en) * 1987-11-09 1991-11-05 The United States Of America As Represented By The United States Department Of Energy Quick-sealing design for radiological containment
JPH0177998U (zh) * 1987-11-16 1989-05-25
JPH0632639Y2 (ja) * 1989-09-01 1994-08-24 ミドリ安全株式会社 使い捨てグローブボックス
DE4030186A1 (de) 1989-10-06 1991-04-18 Siemens Ag Handschuhkasten
JPH0439255U (zh) * 1990-07-31 1992-04-02
JP3127313B2 (ja) * 1991-09-13 2001-01-22 大成建設株式会社 放射能拡散防止ハウス
JPH0580198A (ja) * 1991-09-19 1993-04-02 Hitachi Ltd 不燃性雑固体の固化方法
JP3348489B2 (ja) * 1993-11-29 2002-11-20 ヤマハ株式会社 漏洩試験方法
JP2978729B2 (ja) * 1994-11-29 1999-11-15 核燃料サイクル開発機構 グローブボックス内装機器の撤去・更新方法
JP3018145B2 (ja) * 1996-02-08 2000-03-13 三洋化成工業株式会社 下水油分固化防止方法及び下水油分固化防止材
JP2003200148A (ja) * 2001-12-28 2003-07-15 Toshiba Corp 有害有機物収容機器解体装置および同解体方法
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CN2716407Y (zh) * 2004-06-10 2005-08-10 孙宏斌 便携式充气保温车库
CN100343464C (zh) * 2005-11-17 2007-10-17 上海中大科技发展有限公司 一种纳米智能控温供热、阻燃防水帐篷及其制备方法
JP2010230524A (ja) * 2009-03-27 2010-10-14 Atox Co Ltd 放射線遮蔽体を形成する方法及び袋体
JP5306939B2 (ja) * 2009-08-07 2013-10-02 澄男 大河 膜部材における開口部移動構造

Also Published As

Publication number Publication date
JP2014098556A (ja) 2014-05-29
EP2515311A2 (en) 2012-10-24
CN102852375B (zh) 2016-05-11
EP2515311A3 (en) 2014-03-05
JP6079984B2 (ja) 2017-02-15
CN102852375A (zh) 2013-01-02

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