EP0463948B1 - Verfahren zum Abbauen einer begrabenen Anlage mit Kontaminationsgefahr und Interventionskiste - Google Patents

Verfahren zum Abbauen einer begrabenen Anlage mit Kontaminationsgefahr und Interventionskiste

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Publication number
EP0463948B1
EP0463948B1 EP91401691A EP91401691A EP0463948B1 EP 0463948 B1 EP0463948 B1 EP 0463948B1 EP 91401691 A EP91401691 A EP 91401691A EP 91401691 A EP91401691 A EP 91401691A EP 0463948 B1 EP0463948 B1 EP 0463948B1
Authority
EP
European Patent Office
Prior art keywords
vessel
box
dismantled
section
vessel 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.)
Expired - Lifetime
Application number
EP91401691A
Other languages
English (en)
French (fr)
Other versions
EP0463948A1 (de
Inventor
François Bodin
Jean-Claude Saublet
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 Cycle SA
Original Assignee
Compagnie Generale des Matieres Nucleaires SA
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 Compagnie Generale des Matieres Nucleaires SA filed Critical Compagnie Generale des Matieres Nucleaires SA
Publication of EP0463948A1 publication Critical patent/EP0463948A1/de
Application granted granted Critical
Publication of EP0463948B1 publication Critical patent/EP0463948B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G21F5/00—Transportable or portable shielded containers
    • 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
    • G21F5/06—Details of, or accessories to, the containers
    • G21F5/14—Devices for handling containers or shipping-casks, e.g. transporting devices loading and unloading, filling of containers

Definitions

  • the invention relates to a method of dismantling buried installations without shelter, at risk of radioactive contamination and possibly irradiating, in particular installations with linear extension such as disused effluent pipes.
  • non-contamination or “decontamination” means the state of a material for which its radioactivity is less than a predetermined threshold and given for example by the regulations in force.
  • Document US-A-4,813,313 describes an installation making it possible to dismantle the internal part, contaminated by radioactivity, of a wall previously used as protection for a nuclear reactor.
  • This installation includes a vertical pillar whose upper end is supported by a gantry resting on the upper surface of the wall.
  • the pillar supports devices capable of cutting the internal part of the wall and a gripping device capable of gripping the previously cut wall blocks, to evacuate them outside.
  • document EP-A-O 123 598 describes a mobile enclosure designed to ensure the replacement and the transport of a contaminated part of a nuclear installation.
  • the mobile enclosure comprises a rotary barrel with at least two cells, capable of receiving respectively the contaminated part and a new part.
  • the radioactivity of the cuttings and the excavation corresponding to the dismantled section is measured and any soil whose radioactivity exceeds a predetermined threshold is removed from the excavation to an appropriate storage area.
  • earthworks are carried out with a view to pre-clearing the sections according to the section being dismantled, during which the cuttings having a radioactivity above the predetermined threshold are temporarily stored in said box before their evacuation to the storage area.
  • the box further comprises a removable internal cover covering the central opening for temporarily isolating the interior of the box from the working area in which the section is being dismantled.
  • the box also comprises a suction device with a filter of the movable head type for capturing dust in this area.
  • the forced ventilation and suction devices are such that, after the removable internal cover has been put in place, the working area is in depression relative to the interior of the box and the interior of the box itself is in depression relative to the outside air.
  • the flexible curtain is constituted by a bellows one end of which is secured to the edges of the central opening and the other end of which carries a rigid frame capable of receiving said bellows when the latter is in the retracted position.
  • this bellows is maneuvered in the extended position or retracted by a winch lifting device associated with the frame.
  • two sides of the opening form a raceway for a carriage suspended in the opening.
  • the carriage carries a hydraulic shovel.
  • the tray has a reception area for a container accessible from a window with removable cover preferably located in the part forming the roof of the box and, optionally, a work area for the section being dismantled.
  • the tray also includes a reception area for a land receiving container, accessible from another window with a removable cover preferably located in the part forming the roof of the box.
  • the box comprises a hopper fitted with a helmet with controlled opening passing through the external envelope and opening above the reception area of the land reception container. This hopper accommodates contaminated earthmoving soil extracted by a hydraulic shovel with closed buckets located outside the box. Such an arrangement allows the confinement on the one hand of the debris of the installations being dismantled and on the other hand of the excavation and embankment soil which would be contaminated.
  • the box is constructed around two half-shells assembled in a removable manner on either side of a vertical median plane preferably parallel to the side of the largest dimension of the plate. -floor.
  • the central opening has a rectangular shape adapted to be positioned substantially in alignment with the unitary section to be dismantled.
  • reference 10 shows a trench open in the ground S to clear installations at risk of radioactive contamination and possibly irradiating, with large linear extension such as pipes, gutters, ducts, conduits , electric cables, etc.
  • a nonlimiting example of disused installations to be dismantled there is shown in section in FIG. 1 two metallic conduits 12 and a concrete sheath 14 consisting of an element 16 with a cross-section U shape called flue and a cover 18 formed of joined slabs (the interior of the sheath 14 being lined with other conduits and pipes not shown).
  • a movable intervention box 24 seen from the side by its "front" face (that is to say the face opposite the installation to be dismantled).
  • the box 24 has substantially the shape of a rectangular parallelepiped about 13 meters long by 5 meters wide and 4 meters high.
  • This box has a self-supporting structure produced around a very resistant floor plate 26 made of an assembly of steel beams (in particular the beams 25 and 27, and the U-beams, 29 and 31, seen in profile on the Figure 1) and capable of supporting, in addition to lifting and handling equipment, large loads of soil and / or debris from the installations to be dismantled.
  • the box 24 is moved and set up by a mobile crane (not shown) by means of a double set of “front” and “rear” slings, each consisting of high slings 28 integral with the hook of the crane and kept apart by a rigid tubular lifter 30, and low slings 32 arranged as illustrated in FIG. 1 between the lifter 30 and the floor plate 26, on each side of the box 24.
  • the roof 34 carries two pairs of vertical protections 36, the V-shaped end fittings of which are intended to receive the lifting beams 30 at rest and thus protect the roof 34.
  • the reference 22 represents a continuous concrete rail running along the pipes to be dismantled and the reference 20 represents a stud consisting of a concrete die 38 placed at the bottom of the trench or excavation 10 and d '' a tubular steel pillar 40 adjustable in height.
  • wooden planks 42 are arranged between the supports and the floor 26.
  • FIG. 2 illustrates a schematic view from above (roof removed) of the box 24 according to the invention.
  • Anchored on the floor plate 26 are arranged, along each long side of the box, five posts 44 (shown by the square sections) so as to define in the box four modules 41, 43, 45 and 47.
  • each "front" and “rear” side of the box has two adjoining twin posts 49 anchored on the floor plate 26.
  • the posts 44 carry cladding 46 forming a rigid external envelope and the roof 34.
  • the pads 20 are arranged in line with the posts 44 to ensure good load transfer. It should be noted that the use of studs proves to be well suited in sites with difficult access and where the available space is limited.
  • the plate 26 has a large elongated central opening 48 of substantially rectangular shape at the height of the modules 43 and 45 and through which the occupants of the box 24 have access to the conduits 12 and to the concrete sheath 14.
  • the edges of the opening 48 support four skirts 50 of plastic canvas coated with a double layer of vinyl (see Figures 1 and 3).
  • the four skirts 50 form a static confinement, a sort of protective curtain arranged around the central opening 48 to surround and isolate from the outside the working area in which the section is being dismantled.
  • the box 24 is provided with an airlock housed in the module 43.
  • the airlock is of a type with two compartments 52 and 54 produced by vinyl walls mounted on tubes and allows operator entry / exit operations by three doors shown schematically in Figure 2 by three double arrows.
  • the part of the roof opposite each module includes a large rectangular window 56 sealed with a removable cover 58.
  • Windows 56 mainly the windows corresponding to modules 41 and 47, are used to evacuate the earth from the excavation and special containers presented in detail below. -after.
  • the entire interior of the cladding 46 is lined with a double thickness of vinyl fabric (not shown) and ventilation in the box is ensured by a powerful filter group 60 at high flow rate (for example, 100 Nm3 / h) fitted with filters. interchangeable suitably adapted to retain inter alia contaminated dust.
  • the box is equipped with an atmospheric-type radiocontrol device with air sampling.
  • the box described here by way of nonlimiting example of a first embodiment of the invention has an interesting feature from the point of view of transport from one site to another; more precisely the box is pre-assembled into three sub-assemblies which are on the one hand the roof 34 and on the other hand two half-shells each formed by half of the self-supporting structure provided with its external cladding 46.
  • the two half-shells are assembled by bolts 62 at the beams 29 and 31 and twin posts 49, on either side of a vertical median plane P, P ′.
  • the half-shells structured around the two half-plates are capable of being easily transported by road on a trailer.
  • FIG. 2 The interior arrangement of the box is shown in FIG. 2 and, in part, in FIG. 3 which details the modules 41 and 43 in longitudinal section along the line A, A ′, A ⁇ , A ′′′ in FIG. 2.
  • the module 41 adjacent to the "front" face of the box houses a reception area for a steel or concrete container reinforced with fibers 64 intended to receive contaminated soil and a reception area 66 for the temporary storage of tools, for example the double clamshell bucket 68 shown in FIG. 3.
  • the clamshell bucket 68 is fixed to a hoist 70 itself associated with an overhead crane 72 capable of moving on two rails 74 covering the entire interior of the box and carried by the posts 44.
  • the hoist 70 can be used in combination with the clamshell bucket 68 with hydraulic closure to clean the excavation of the contaminated earth and / or to move large loads inside the box, for example the container 64 for receiving the earth or pieces of the concrete sheath 14 (in this case, the bucket 68 is temporarily stored on the area 66 consisting of a steel sheet with a rim covered with an interchangeable vinyl veil).
  • the container 64 for receiving the earth is placed under the mouth of a hopper 76 passing through the "front" wall of the box.
  • This hopper 76 allows temporary storage inside the contaminated earth box cleared by the adjustable hydraulic shovel with extendable arm 80 anchored on an external projection 82 of the pad- floor 26 (in FIG. 2, only the adjustable seat of the shovel is shown diagrammatically under the reference 80).
  • the shovel 80 is fitted with a clamshell bucket 84, the two buckets of which are closed with a protective plate and a hydraulic device 85 for orienting the buckets for precision work, the operator working from a control panel 86 placed next to a conventional pressurized fluid generator group 88.
  • the modules 43 and 45 of the box are mainly occupied by the rectangular central opening 48 which, for reasons of gain in volume, is offset with respect to the plane of symmetry P, P ′.
  • the opening 48 is aligned with the installations to be dismantled, that is to say the concrete sheath 14 (of which only the cover 18 is visible in FIG. 2) and the steel pipes 12.
  • the installations are thus directly accessible from inside the box.
  • the module 43 houses the airlock with its compartments 52 and 54 while the module 45 houses a reception area 90 for pieces of large dimensions of the installations.
  • FIG. 2 shows a unit element of approximately 3 meters (the flue 92) belonging to the concrete sheath to be dismantled.
  • the provisional reception area or work area 90 consists of a sheet of steel sheet ledge fitted with an interchangeable vinyl veil.
  • the length of the opening 48 has been chosen slightly greater than two lengths of flue 92 to correspond to two unit sections to be dismantled T1 and T2.
  • a carriage 94 suspended in the opening 48 is mounted on two rails formed by the beams 96 of the floor plate 26 which define the two long sides of the opening 48.
  • the carriage 94 is capable of receiving the container 64 for receiving the earth (as illustrated in 64a in FIGS. 2 and 3) during the cleaning phase of the excavation 10 and / or other debris presenting risks of contamination during the dismantling phase properly said.
  • Module 47 essentially houses a high-security standardized 98 anti-radiation container made of steel provided with an internal coating of concrete deposited transversely to the box.
  • This container 98 is intended to receive debris from installations after dismantling. In the present case, the capacity of the container allows the storage of the equivalent of four unitary sections of three meters.
  • the module 47 also houses an orientable jib 100 whose arm 102 carries an electric hoist 104 itself capable of carrying a certain number of tools such as hooks, self-tightening pliers, hydraulic clamp, saws, etc. This jib 100 is particularly intended for handling the pieces of the section being dismantled with a view to loading the container 98, either directly or after storage on the reception area 90.
  • the module 47 houses a second reception area (not shown) for the temporary storage of tools, consisting of a sheet steel plate with a rim fitted with an interchangeable vinyl sheeting.
  • the arrangement of the box is such that the dismantling work can be carried out with good radiation protection conditions in a relatively small volume.
  • the air space above the installation to be dismantled is widely used both for moving the box 24 and for the entry / exit movements of the container 64 for receiving the earth and the anti-radiation container 98 after release. covers 58 of the two windows 56 corresponding to modules 41 and 47.
  • the start-up of the box begins with the installation of a series of five studs 20 to the open air with an interval of 3 meters and the construction of the support rail 22 on either side of the routing of the pipes 12 and of the sheath 14 to be dismantled.
  • the box 24 is then placed above the first unitary sections to be dismantled, using a crane, then suitably wedged on the studs 20 and the rail 22.
  • the flexible vinyl curtain 50 is put in place, as well as two cofferdams at the "front” and at the "rear” of the box to collect rainwater. Only the water recovered at the "rear” of the box, that is to say in the sanitized area, will be discharged by pumping into the river network after inspection.
  • the pipes 12 and the concrete sheath 14 are then released in situ in their excavation 10 with the help of the inner skip 68.
  • the soil contaminated beyond a certain specific activity (for example, greater than 3700 Bq / kg) is then stored in containers 64 internally covered with vinyl.
  • the tiles forming the cover 18 of the sheath are checked and stored in the bottom of the container 98. This removal of the tiles is carried out over a length of 3 meters corresponding to a unitary section T1 to be dismantled (the length of the unitary section to be dismantled has been chosen at 3 meters depending on the unit length of a flue).
  • the separation of the flue thus released begins with a lifting using hoists and self-tightening pliers suitable, to allow the establishment in the bottom of the excavation 10 of a sheet of recovery of debris covered with a sheet of vinyl.
  • the flue 92 is then detached by cutting with a circular saw at the level of the cement joint existing between the flues. If necessary, the flue is cut using a hydraulic hammer. We then proceed to cut the elements lining the flue, such as plastic pipes, and temporarily store this debris in the carriage 94. It is possible for this purpose to use a basket (not shown) in place of the container 64.
  • the flue 92 is then removed from its excavation and deposited on the reception area 90 for control. Depending on the degree of radioactivity, the flue will either be evacuated through the roof of the box directly, or in the event of detected contamination (exceeding a determined threshold of mass radioactivity, for example 3700 Bq / kg) deposited in the anti-contamination container. radiation 98.
  • an anti-radiation container makes it possible to evacuate the debris corresponding to the dismantling of four unitary sections of 3 meters.
  • a hydraulic gripper capable of causing the walls of the flue to burst.
  • the measured mass activity is less than a first determined threshold (for example, 37 Bq / kg, the zone and the corresponding cuttings are considered to be healthy and inactive. If the mass activity is greater than this first threshold and less than a second determined threshold (for example, 3700 Bq / kg), questionable soil is removed with one of the bucket buckets to be transported to a monitored landfill Finally, if the mass activity is greater than this second threshold, the contaminated soil will be removed by one of the skips and stored in the container 64 for receiving the soil. If the external bucket is used, the contaminated soil is transported to the container 64 by the hopper 76.
  • a first determined threshold for example, 37 Bq / kg
  • a second determined threshold for example, 3700 Bq / kg
  • the dismantling of the second section T2 is then carried out as described above.
  • the external bucket 80 is used for the earthwork allowing the pre-clearance of the following sections and the positioning of the studs 20 at 3 meter intervals (the extracted earth being checked and sorted as previously described).
  • FIG. 4 shows another embodiment of an intervention box according to the invention.
  • This box with a structure similar to that of the box already described with reference to the figures 1 to 3, will not be described completely in detail.
  • similar or equivalent elements in the two boxes will bear the same reference number increased by 100.
  • Only the technical modifications and / or additions made to the box in FIG. 4 will be described in detail. Generally, the modifications and / or additions are intended to further improve protection against contamination during dismantling operations.
  • the box according to the invention 124 (shown in median longitudinal section) comprises a reinforced floor plate 126 carried by the pillars 40, 42 by means of support crosspieces 210 (shown in section transverse).
  • This arrangement makes it possible to increase the spacing between the pillars 40.
  • the support crosspieces are placed on sills (not shown) placed on each side of the excavation.
  • the floor plate 126 has a central opening 148 bordered by two beams 196 serving as rails for the carriage 194.
  • This carriage 194 has also been reinforced to carry a hydraulic shovel 180 with large elongation and whose buckets 184 are removable so that they can be replaced during certain operations by other suitable tools.
  • the shovel 180 is thus mobile with the carriage 194 in the opening 148 for depositing soil taken from the bottom of the excavation 10 in the container 64 (the reference 180a shows the shovel in another working position).
  • the steel-concrete container 98 is placed at the other end of the box 124 to be evacuated through the window 156 of the section 147.
  • the flexible protective curtain 150 intended to isolate the work area in the excavation from the outside, consists of a thick vinyl bellows, one end is secured to the edge of the central opening 148 and the other end of which carries a rigid frame 212 provided with a gutter intended to receive the bellows when the latter is in the retracted position (curtain raised).
  • the curtain 150 is maneuvered in the extended or retracted position (curtain lowered or raised) by a hoist lifting device of which we can see, in FIG. 4, only the operating belts 216.
  • the curtain 150 is lined internally with a double thickness of vinyl (not shown).
  • the box 124 comprises a rigid external envelope formed of posts 144 and of cladding 146 lined with vinyl and a roof 134 provided with windows 156.
  • the posts 144 carry the two rails 174 on which a traveling crane 172, carrying a hoist 170, is liable to move.
  • the box 124 includes a double airlock system (not shown) similar to that (52, 54) described with reference to the box 24.
  • the floor plan 126 is (unless otherwise stated ) substantially identical to that of the floor 26 of the box 24 illustrated in FIG. 2.
  • the box 124 is also assembled from two bolted half-shells according to the arrangement described for the box 24.
  • the working area 217 of the excavation 10, in which the section being dismantled is located, is temporarily isolated from the interior 219 of the box 124 by a removable internal cover 218 covering the central opening 148 and constituted by panels 220 aluminum covered with vinyl protection and placed on an internal partition 222 surrounding the opening 148.
  • This partition 222 carries lighting 224.
  • the collection of contaminated dust is produced by two independent ambient air purification systems in the box 124 and in the work area each having their battery of filters arranged inside the box.
  • the systems which are not illustrated in FIG. 4 consist of a forced ventilation system similar to that described under reference 60 for the box 24 and a suction device with a movable head capable of being placed in the immediate vicinity of the elements being dismantled (concrete sheath 14 or pipes 12).
  • the cover 218 allows improved containment of contaminated debris and increased protection for the occupants of the box. In general, it is sought to carry out as much dismantling work as possible when the internal cover 218 is in place on the partition 222 to ensure its insulation function. This is the case for cutting and preconditioning under vinyl of debris from pipes, slabs and flue.
  • the invention is not limited by the linear nature of the installations to be dismantled, here described by way of example; in particular the method according to the invention can be used for dismantling other types of construction with a possible adaptation of the box to the specifics of the site to be carried out.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (22)

  1. Verfahren zum Abbauen einer Anlage mit Kontaminationsgefahr (12, 14) und eventuell strahlend, nach dem der Abbau in Einheitsabschnitten (T1, T2) der Anlage durchgeführt wird, abgedeckt durch eine verschiebbare Interventionskiste (24), angeordnet über dem abzubauenden Abschnitt (T1, T2),
    dadurch gekennzeichnet, daß die Anlage außerhalb der Schutzeinschließung bzw. ungeschützt begraben ist, wobei das abzubauende Teilstück (T1) nach Anbringen der Kiste (24, 124) nacheinander:
    - mit einer Schutzhülle (50, 150) umgeben wird;
    - in situ in seiner Grube (10) freigelegt wird;
    - vom Rest der Anlage getrennt wird;
    - in der Kiste (24, 124) zerstückelt wird;
    - in einem in der Kiste lagerndem Behälter (98) untergebracht wird;
    - in dem Behälter (98) aus der Kiste entfernt wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man eine Messung der Radioaktivität des Abtrags und der dem abgebauten Abschnitt (T1) entsprechenden Grube (10) vornimmt, und daß man die ganze Erde, deren Radioaktivität eine vorher festgelegte Schwelle überschreitet, aus der Grube entfernt, zu einem geeigneten Lagerbereich.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß man einen Erdaushub vornimmt hinsichtlich einer Vorfreilegung der Abschnitte, die dem Abschnitt folgen, der gerade abgebaut wird (T1, T2), während dem die Abträge, die eine höhere Radioaktivität aufweisen als die vorher festgelegte Schwelle, vor ihrer Entleerung in den Lagerbereich vorübergehend in der genannten Kiste gelagert werden.
  4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß man in dem Maße, wie der Abbau der Anlage (12, 14) fortschreitet, auf beiden Seiten dieser Anlage (12, 14) Träger der verschiebbaren Kiste anbringt, wie etwa Stützpunkte (20) oder eine Stützschiene (22).
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Kiste (24, 124) mittels Kran versetzt wird.
  6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß es verwendet wird für den Abbau einer Anlage mit linearer Ausdehnung, vor allem stillgelegte Leitungen, eventuell geschützt durch eine Betonhülle.
  7. Interventionskiste zur Durchführung des Verfahrens nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie umfaßt:
    - eine selbsttragende Struktur (26-44-49, 126-144), ausgeführt um eine Bodenplatte (26, 126) herum, versehen mit einer zentralen Öffnung (48, 148), wobei die genannte Struktur diverse bewegliche Hebe- und/oder Handhabungswerkzeuge (70, 104, 170) trägt und eine Außenhülle (46, 146), versehen mit einer Schleuse (52, 54) und/oder wenigstens einem Fenster (56, 156) mit beweglicher Haube (58);
    - einen biegsamen Schutzvorhang (50, 150), angeordnet um die zentrale Öffnung (48, 148) herum, um eine Arbeitszone einzuschließen und nach außen zu isolieren, in der sich der im Abbau befindliche Abschnitt (T1, T2) befindet, wobei die genannte Zone aus der Kiste zugänglich ist;
    - eine Zwangsventilationseinrichtung (60) mit Filter, eine dynamische Einschließung gewährleistend, um das Innere der Kiste von kontaminierten Stäuben zu reinigen.
  8. Kiste nach Anspruch 7, dadurch gekennzeichnet, daß sie außerdem eine abnehmbare Haube (218) umfaßt, die die zentrale Öffnung (148) abdeckt, um momentan das Innere (219) der Kiste von der Arbeitszone (217) zu trennen, in der sich der Abschnitt befindet, der gerade abgebaut wird.
  9. Kiste nach einem der Ansprüche 7 und 8, dadurch gekennzeichnet, daß sie eine Absaugeinrichtung mit Filter der Bauart mit beweglichem Kopf umfaßt, um in der genannten Arbeitszone die kontaminierten Stäube einzufangen.
  10. Kiste nach den Ansprüchen 7 und 9 zusammengenommen, dadurch gekennzeichnet, daß die Zwangsventilations- und die Absaugeinrichtung derartig sind, daß nach dem Anbringen der inneren, abnehmbaren Haube (218) in der Arbeitszone (217) Unterdruck herrscht in bezug auf das Innere (219) der Kiste, und im Inneren (219) der Kiste Unterdruck herrscht in bezug auf die Außenluft.
  11. Kiste nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, daß der sogenannte biegsame Vorhang (150) gebildet wird durch einen Balg, dessen eines Ende fest verbunden ist mit den Rändern der zentralen Öffnung (148), und dessen anderes Ende einen steifen Rahmen (212, 214) trägt, der den genannten Balg (150) aufnehmen kann, wenn dieser in zurückgezogener Stellung ist.
  12. Kiste nach Anspruch 11, dadurch gekennzeichnet, daß der genannte Balg durch eine mit dem Rahmen (216) verbundene Winden-Hebeeinrichtung in seine gestreckte oder zurückgezogene Stellung gebracht wird.
  13. Kiste nach einem der Ansprüche 7 bis 12, dadurch gekennzeichnet, daß die genannte Platte (26) eine Abstellfläche für einen Behälter (98) aufweist, zugänglich von einem Fenster (56, 156) mit abnehmbarer Haube (58), vorzugsweise in dem Teil befindlich, der das Dach (34, 134) der Kiste bildet und eventuell eine Arbeitsfläche (90) für den Abschnitt (92), der gerade abgebaut wird.
  14. Kiste nach einem der Ansprüche 7 bis 13, dadurch gekennzeichnet, daß sie eine Rollbrücke (72, 172) umfaßt, beweglich über der Platte und wahlweise adaptiert, um einen Greifkübel mit Hydraulikverschluß (68) zu tragen.
  15. Kiste nach einem der Ansprüche 7 bis 14, dadurch gekennzeichnet, daß sie einen drehbaren Auslegerarm (100) umfaßt, ausgestattet mit einem Flaschenzug (104).
  16. Kiste nach einem der Ansprüche 7 bis 15, dadurch gekennzeichnet, daß die genannte Platte (26, 126) eine Abstellfläche für einen Erdaufnahmebehälter (64) umfaßt, zugänglich von einem zweiten Fenster (56, 156) mit abnehmbarer Haube (58), vorzugsweise in dem das Dach (34, 134) bildenden Teil der Kiste befindlich.
  17. Kiste nach Anspruch 16, dadurch gekennzeichnet, daß sie einen Trichter (76) umfaßt, versehen mit einem Aufsatz mit gesteuerter Öffnung (78), die genannte Außenhülle (46) durchquerend und über der Abstellfläche des Erdaufnahmebehälters (64) mündend.
  18. Kiste nach einem der Ansprüche 7 bis 17, dadurch gekennzeichnet, daß die genannte Platte ein äußeres Ende (82) umfaßt, auf das ein Hydraulikbagger (80) mit geschlossenen Kübeln (84) montiert ist.
  19. Kiste nach einem der Ansprüche 7 bis 18, dadurch gekennzeichnet, daß zwei Seiten der zentralen Öffnung (48, 148) einen Rollweg (96, 196) bilden für einen in der genannten zentralen Öffnung hängenden Wagen (94, 194).
  20. Kiste nach Anspruch 19, dadurch gekennzeichnet, daß der genannte Wagen (194) einen Hydraulikbagger (180) trägt.
  21. Kiste nach einem der Ansprüche 7 bis 20, dadurch gekennzeichnet, daß sie um zwei Halbschalen herum gebaut ist, demontierbar zusammengesetzt zu beiden Seiten einer vertikalen Mittelebene (P,P′), vorzugsweise parallel zu den Seiten der Bodenplatte (26, 126), die die größere Abmessung aufweisen.
  22. Kiste nach einem der Ansprüche 7 bis 21, verwendbar vor allem für den Abbau von Anlagen mit linearer Ausdehnung (12, 14), dadurch gekennzeichnet, daß die zentrale Öffnung (48, 148) eine angepaßte rechteckige Form aufweist, die positioniert werden kann, um im wesentlichen mit dem abzubauenden Abschnitt (T1, T2) zu fluchten.
EP91401691A 1990-06-25 1991-06-21 Verfahren zum Abbauen einer begrabenen Anlage mit Kontaminationsgefahr und Interventionskiste Expired - Lifetime EP0463948B1 (de)

Applications Claiming Priority (2)

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FR9007948 1990-06-25
FR909007948A FR2663777B1 (fr) 1990-06-25 1990-06-25 Procede de demantelement d'une installation enterree hors abri, a risque de contamination et eventuellement irradiante, et caisson d'intervention pour mettre en óoeuvre ce procede.

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EP0463948A1 EP0463948A1 (de) 1992-01-02
EP0463948B1 true EP0463948B1 (de) 1995-03-08

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US (1) US5278877A (de)
EP (1) EP0463948B1 (de)
CZ (1) CZ194691A3 (de)
DE (1) DE69107911T2 (de)
FR (1) FR2663777B1 (de)
HU (1) HUT60339A (de)
SK (1) SK194691A3 (de)

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JP7241010B2 (ja) * 2019-12-25 2023-03-16 三菱重工業株式会社 作業装置の案内方法および放射性廃棄物の処理装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123598A1 (de) * 1983-04-13 1984-10-31 Commissariat A L'energie Atomique Drehbarer Transport- und Ersatzbehälter für verunreinigte Teile und Ergänzungsetui für diesen Behälter
US4813313A (en) * 1985-11-25 1989-03-21 Kabushiki Kaisha Kobe Seiko Sho Apparatus for demolishing a reactor shield wall

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US3910006A (en) * 1973-06-07 1975-10-07 Westinghouse Electric Corp Fuel element handling arrangement and method
US4410802A (en) * 1976-04-15 1983-10-18 Szulinski Milton J Storage depot for radioactive material
DE2854330C2 (de) * 1978-12-15 1983-01-05 Alfred Kunz GmbH & Co, 8000 München Verfahren zur Beseitigung von stillgelegten Kernkraftwerken
DE2929467C2 (de) * 1979-07-20 1985-04-25 Kraftwerk Union AG, 4330 Mülheim Lagergebäude für abgebrannte Kernreaktorbrennelemente
FR2487106A1 (fr) * 1980-07-15 1982-01-22 Commissariat Energie Atomique Installation de remplacement d'un organe d'un circuit de fluide contamine et procede de remplacement de cet organe
US4681706A (en) * 1984-07-05 1987-07-21 Westinghouse Electric Corp. Nuclear waste packaging facility
FR2596565B1 (fr) * 1986-04-01 1988-07-01 Cogema Procede de mise en etui d'un faisceau de crayons d'un assemblage de combustible nucleaire et installation pour la mise en oeuvre de ce procede
GB2222196B (en) * 1988-02-08 1991-07-17 Kunz Alfred & Co A process for lowering a building structure into the ground

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123598A1 (de) * 1983-04-13 1984-10-31 Commissariat A L'energie Atomique Drehbarer Transport- und Ersatzbehälter für verunreinigte Teile und Ergänzungsetui für diesen Behälter
US4813313A (en) * 1985-11-25 1989-03-21 Kabushiki Kaisha Kobe Seiko Sho Apparatus for demolishing a reactor shield wall

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HUT60339A (en) 1992-08-28
FR2663777A1 (fr) 1991-12-27
US5278877A (en) 1994-01-11
DE69107911T2 (de) 1995-11-02
SK280439B6 (sk) 2000-02-14
CZ194691A3 (en) 1994-08-17
EP0463948A1 (de) 1992-01-02
FR2663777B1 (fr) 1994-06-17
DE69107911D1 (de) 1995-04-13
SK194691A3 (en) 2000-02-14
HU912121D0 (en) 1991-12-30

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