CA2095241A1 - Shielding cover - Google Patents
Shielding coverInfo
- Publication number
- CA2095241A1 CA2095241A1 CA002095241A CA2095241A CA2095241A1 CA 2095241 A1 CA2095241 A1 CA 2095241A1 CA 002095241 A CA002095241 A CA 002095241A CA 2095241 A CA2095241 A CA 2095241A CA 2095241 A1 CA2095241 A1 CA 2095241A1
- Authority
- CA
- Canada
- Prior art keywords
- shielding cover
- lid
- shielding
- housing part
- aperture
- 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.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F7/00—Shielded cells or rooms
- G21F7/005—Shielded passages through walls; Locks; Transferring devices between rooms
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/32—Apparatus for removing radioactive objects or materials from the reactor discharge area, e.g. to a storage place; Apparatus for handling radioactive objects or materials within a storage place or removing them therefrom
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Plasma & Fusion (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Sampling And Sample Adjustment (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The object of the invention is a shielding cover containing a tackle line, the end of which is secured with a claw inside the shielding cover. The claw is designed to grasp baskets with radioactive materials like waste which are to be stored in a container arranged beneath the shielding cover and is closable with a lid. The lid is used at the same time as the closure for the shielding cover. The shielding cover contains a laterally projecting housing section. In this section the lid is arranged to move between two end positions transversely to the longitudinal axis of the shielding cover. In one end position the lid reveals a lower aperture in the shielding cover. In the other end position the lid closes off the shielding cover. A fluid acceptance tank is also arranged to move between two end positions in the housing section beneath the lid. While the fluid acceptance tank reveals the aperture in one end position, it covers it in the other.
The object of the invention is a shielding cover containing a tackle line, the end of which is secured with a claw inside the shielding cover. The claw is designed to grasp baskets with radioactive materials like waste which are to be stored in a container arranged beneath the shielding cover and is closable with a lid. The lid is used at the same time as the closure for the shielding cover. The shielding cover contains a laterally projecting housing section. In this section the lid is arranged to move between two end positions transversely to the longitudinal axis of the shielding cover. In one end position the lid reveals a lower aperture in the shielding cover. In the other end position the lid closes off the shielding cover. A fluid acceptance tank is also arranged to move between two end positions in the housing section beneath the lid. While the fluid acceptance tank reveals the aperture in one end position, it covers it in the other.
Description
The invention relates to method for transporting materials such as radioactive waste in accordance with the preamble of Claim 1, and to a shielding cover.
For transporting radioactive materials such as waste, shielding covers are used that reduce the radiation emanating from the materials to permissible limit values.
The radioactive materials present in baskets are picked up by a claw disposed above the storage point and pulled into the interior of the shielding cover. The aperture of the shielding cover is then covered. The shielding cover with the radioactive load can now be conveyed to a container whose the lid has been removed and placed on a special frame, for example. The baskets are then placed inside the container. The materials can be loaded in this way into transport containers.
A device for transporting radioactive materials is ~nown from FR-A 1 226 659, that comprises a housing which can be placed on a container and closed at the top using the lid of the container, and is open at the bottom.
EP-A O 187 557 describes a transport device between a container and a receptacle of the latter. A double sealing arrangement is used here that comprises two closures of the container and two closures of the receptacle.
The object underlying the invention is to further develop a method of the type described at the outset such that the container can be loaded simply without the shielding function of the shielding cover being impaired on the one hand and the danger arising of contamination through the container lid on the other hand.
The object is attained in accordance with the invention substantially in that the lid of the container disposed underneath the bottom aperture is used for the shielding cover. Accordingly, the shielding cover is closed in accordance with the invention by a lid which is the same 209~2~1 one closing the container in which the material to be transported is to be inserted using the shielding cover.
The container lid accordingly doubles as the closure for the shielding cover. This permits easy handling without the need to take precautions for storing the container lid while the container is being loaded.
To permit allocation of containers -of differing sizes or lid dimensions to a shielding cover, adapter rings or similar, for example, are disposable on the shielding cover aperture to ensure that the lid to be fitted covers the aperture to the required extent and that the lid can be fitted into the shielding cover.
A shielding cover for implementation of the method having a pulling element such as a tackle line, on whose free end disposed in the interior of said shielding cover is disposed a claw element for receptacles such as baskets to hold preferably radioactive materials such as waste which are insertable via a bottom aperture of said shielding cover into the latter or unloadable from said shielding cover for insertion into a container closable by a lid, where said shielding cover is provided with a radiation-shielding housing part projecting at least on one side and where a lid is provided movable transverse to the longitudinal axis of the shielding cover, raisable and lowerable in the direction of the longitudinal axis, and shielding against radiation in a first end position in the lateral projection of said housing part and disposed above said aperture in a second end position, is characterized in that the lid (20) movable in the shielding cover (1) is that of the container (10) and in that a fluid acceptance tank ~44) movable transverse to the longitudinal axis and in a first end position in the lateral projection of the housing part (4) and in a second end position on or above the aperture (8) is disposed underneath the movable lid when the latter is disposed in the shielding cover. The 2a 209~2~1 ..
fluid acceptance tank is only moved, i.e. removed, from the shielding cover aperture immediately prior to loading of the container, to ensure that water cannot drip out of the shielding cover and lead to contamination. The shielding tank and the closure are then not moved synchronously.
A rope drive is preferably fastened in encapsulated form to the outside of the shielding cover. By rope drive is understood the drive motor and the drum for the rope. The rope passes through a slot in the wall of the shielding cover into the interior of the latter. The rope drive is accessible from the outside for service and repair purposes.
--(3~
The rope drive can also be connected directly or indirectly to a weighing unit such as a weighing cell in order to measure and at the same time record the weight of the basket contents, i.e. of the materials to be loaded or transferred.
The lid is ideally suspended from a support plate with a joint in the center, said plate being movable by a lifting drive along vertical guides, with these guides and the lifting drive being connected to a beam movable along horizontal r~ils.
It is favorable for the movable beam to be connected via a block having a threaded hole to a rotatably mounted threaded spindle, one end of which projects out of the housing part and is connected to a geared motor fastened to the outside of the housing part. The geared motor on the outside of the shielding cover is quickly and easily accessible for inspection and service work. In the event of a fault, it is possible to move the beam from the outside should this prove necessary.
The support plate is preferably connected, at two points diametrically opposite to one another in relation to the lid suspension, to ends of threaded spindles inserted into threaded bushes of the beam that are rotatably mounted on said beam and are connected by shafts to a motor fastened to the beam, said motor having shaft ends projecting from both sides of its housing, one of which is aligned flush with an opening in the wall of the shielding cover in the second end position of the lid, with this openinq being 209~241 W~ 92/08233 PCT/EP91/02058 closable using a plug. In the event of a motor failure, the lifting drive can be operated after removal of the plug above the one shaft end of the motor by a shaft attached to this motor, in order to raise or lower the lid, f~r example. Both the lifting drive and the drive unit intended for transverse movement are according operable from the outside in the event of an operating fault, so that protection from radiation emanating from the load is provided during handling.
The fluid acceptance tank is preferably provided on its sides with wheels that run on rails, with one side of the fluid acceptance tank having fastened to it a drive block having a threaded hole in which a threaded spindle is mounted, one end of which projects from the housing part and is connected to a geared motor fastened to the outside of the housing part. In the event of a fault in the geared motor, the threaded spindle on the outside of the shielding cover is accessible. Necessary operating measures can therefore be performed without risk from radiation emanating from the load in the shielding cover.
The fluid acceptance tank is provided in particular with a water drain line. Drip water and crud particles collect in the fluid acceptance tank. This tank can ~e rinsed out whenever required.
The walls of the shielding cover preferably consist of carbon steel, with the inner sides being lined with special steel as a protection against corrosion.
A waste air connection, using which the interior of the shielding cover can be connected to the waste air system of a reactor building, is provided near the upper end of the shielding cover.
The shieldinq cover also has a decontamination plug in one wall for connection of a high-pressure lance.
., . . . ~ .. ~ ... ..... .... . .. , , . -209~241 ~ ' ' The approach and working positions of the claw, of the lid and of the fluid acceptance tank are preferably picked up by sensors connected to an indicator unit. The geared motors and the sensors are connected to a control unit adjusted such that safety-relevant approach and working positions are interlocXed. This prevents the lid and the fluid acceptance tank being-moved above the aperture when the claw and the tackle line are in the vicinity of this aperture. On the other hand, operation of the rope drive is blocked when the aperture is closed by the lid and the fluid acceptance tank.
The parts inside the shielding cover, in particular the claw, the fluid acceptance tank, the support plate, the beam and the parts for connecting the fluid acceptance tank, the support plate and the beam to the respective geared motors, are preferably made of special steel. It is however also possible to provide these parts with a corrosion-resistant, easy-to-decontaminate and high-pressure waterproof coating, provided they do not perform sliding movements in relation to one another, as do the threaded spindle and threaded bushes.
Attachment points for a two-strap suspension tackle are disposed on the upper end of the shielding cover.
For transport or storage of the shielding cover, the aperture of the shaft is closed using a floor plate that is bolted onto the shielding cover with a seal inserted.
Further details, advantages and features of the invention are given not only in the claims and in the features they describe - singly and/or in combination - but also in the following description of a preferred embodiment as shown in the drawings.
2095~
Wo 92/08233 PCT/EP91/02058 ~ 6 In the drawings, Fig. 1 shows a shielding cover in longitudinal section with open shielding shaft ~:
ig. 2 shows a shielding cover in longitudinal section with closed shielding shaft ig. 3 shows a section along the lines I-I of the shielding cover shown in Fig. 2.
A shielding cover (1) has a block-like shielding section
For transporting radioactive materials such as waste, shielding covers are used that reduce the radiation emanating from the materials to permissible limit values.
The radioactive materials present in baskets are picked up by a claw disposed above the storage point and pulled into the interior of the shielding cover. The aperture of the shielding cover is then covered. The shielding cover with the radioactive load can now be conveyed to a container whose the lid has been removed and placed on a special frame, for example. The baskets are then placed inside the container. The materials can be loaded in this way into transport containers.
A device for transporting radioactive materials is ~nown from FR-A 1 226 659, that comprises a housing which can be placed on a container and closed at the top using the lid of the container, and is open at the bottom.
EP-A O 187 557 describes a transport device between a container and a receptacle of the latter. A double sealing arrangement is used here that comprises two closures of the container and two closures of the receptacle.
The object underlying the invention is to further develop a method of the type described at the outset such that the container can be loaded simply without the shielding function of the shielding cover being impaired on the one hand and the danger arising of contamination through the container lid on the other hand.
The object is attained in accordance with the invention substantially in that the lid of the container disposed underneath the bottom aperture is used for the shielding cover. Accordingly, the shielding cover is closed in accordance with the invention by a lid which is the same 209~2~1 one closing the container in which the material to be transported is to be inserted using the shielding cover.
The container lid accordingly doubles as the closure for the shielding cover. This permits easy handling without the need to take precautions for storing the container lid while the container is being loaded.
To permit allocation of containers -of differing sizes or lid dimensions to a shielding cover, adapter rings or similar, for example, are disposable on the shielding cover aperture to ensure that the lid to be fitted covers the aperture to the required extent and that the lid can be fitted into the shielding cover.
A shielding cover for implementation of the method having a pulling element such as a tackle line, on whose free end disposed in the interior of said shielding cover is disposed a claw element for receptacles such as baskets to hold preferably radioactive materials such as waste which are insertable via a bottom aperture of said shielding cover into the latter or unloadable from said shielding cover for insertion into a container closable by a lid, where said shielding cover is provided with a radiation-shielding housing part projecting at least on one side and where a lid is provided movable transverse to the longitudinal axis of the shielding cover, raisable and lowerable in the direction of the longitudinal axis, and shielding against radiation in a first end position in the lateral projection of said housing part and disposed above said aperture in a second end position, is characterized in that the lid (20) movable in the shielding cover (1) is that of the container (10) and in that a fluid acceptance tank ~44) movable transverse to the longitudinal axis and in a first end position in the lateral projection of the housing part (4) and in a second end position on or above the aperture (8) is disposed underneath the movable lid when the latter is disposed in the shielding cover. The 2a 209~2~1 ..
fluid acceptance tank is only moved, i.e. removed, from the shielding cover aperture immediately prior to loading of the container, to ensure that water cannot drip out of the shielding cover and lead to contamination. The shielding tank and the closure are then not moved synchronously.
A rope drive is preferably fastened in encapsulated form to the outside of the shielding cover. By rope drive is understood the drive motor and the drum for the rope. The rope passes through a slot in the wall of the shielding cover into the interior of the latter. The rope drive is accessible from the outside for service and repair purposes.
--(3~
The rope drive can also be connected directly or indirectly to a weighing unit such as a weighing cell in order to measure and at the same time record the weight of the basket contents, i.e. of the materials to be loaded or transferred.
The lid is ideally suspended from a support plate with a joint in the center, said plate being movable by a lifting drive along vertical guides, with these guides and the lifting drive being connected to a beam movable along horizontal r~ils.
It is favorable for the movable beam to be connected via a block having a threaded hole to a rotatably mounted threaded spindle, one end of which projects out of the housing part and is connected to a geared motor fastened to the outside of the housing part. The geared motor on the outside of the shielding cover is quickly and easily accessible for inspection and service work. In the event of a fault, it is possible to move the beam from the outside should this prove necessary.
The support plate is preferably connected, at two points diametrically opposite to one another in relation to the lid suspension, to ends of threaded spindles inserted into threaded bushes of the beam that are rotatably mounted on said beam and are connected by shafts to a motor fastened to the beam, said motor having shaft ends projecting from both sides of its housing, one of which is aligned flush with an opening in the wall of the shielding cover in the second end position of the lid, with this openinq being 209~241 W~ 92/08233 PCT/EP91/02058 closable using a plug. In the event of a motor failure, the lifting drive can be operated after removal of the plug above the one shaft end of the motor by a shaft attached to this motor, in order to raise or lower the lid, f~r example. Both the lifting drive and the drive unit intended for transverse movement are according operable from the outside in the event of an operating fault, so that protection from radiation emanating from the load is provided during handling.
The fluid acceptance tank is preferably provided on its sides with wheels that run on rails, with one side of the fluid acceptance tank having fastened to it a drive block having a threaded hole in which a threaded spindle is mounted, one end of which projects from the housing part and is connected to a geared motor fastened to the outside of the housing part. In the event of a fault in the geared motor, the threaded spindle on the outside of the shielding cover is accessible. Necessary operating measures can therefore be performed without risk from radiation emanating from the load in the shielding cover.
The fluid acceptance tank is provided in particular with a water drain line. Drip water and crud particles collect in the fluid acceptance tank. This tank can ~e rinsed out whenever required.
The walls of the shielding cover preferably consist of carbon steel, with the inner sides being lined with special steel as a protection against corrosion.
A waste air connection, using which the interior of the shielding cover can be connected to the waste air system of a reactor building, is provided near the upper end of the shielding cover.
The shieldinq cover also has a decontamination plug in one wall for connection of a high-pressure lance.
., . . . ~ .. ~ ... ..... .... . .. , , . -209~241 ~ ' ' The approach and working positions of the claw, of the lid and of the fluid acceptance tank are preferably picked up by sensors connected to an indicator unit. The geared motors and the sensors are connected to a control unit adjusted such that safety-relevant approach and working positions are interlocXed. This prevents the lid and the fluid acceptance tank being-moved above the aperture when the claw and the tackle line are in the vicinity of this aperture. On the other hand, operation of the rope drive is blocked when the aperture is closed by the lid and the fluid acceptance tank.
The parts inside the shielding cover, in particular the claw, the fluid acceptance tank, the support plate, the beam and the parts for connecting the fluid acceptance tank, the support plate and the beam to the respective geared motors, are preferably made of special steel. It is however also possible to provide these parts with a corrosion-resistant, easy-to-decontaminate and high-pressure waterproof coating, provided they do not perform sliding movements in relation to one another, as do the threaded spindle and threaded bushes.
Attachment points for a two-strap suspension tackle are disposed on the upper end of the shielding cover.
For transport or storage of the shielding cover, the aperture of the shaft is closed using a floor plate that is bolted onto the shielding cover with a seal inserted.
Further details, advantages and features of the invention are given not only in the claims and in the features they describe - singly and/or in combination - but also in the following description of a preferred embodiment as shown in the drawings.
2095~
Wo 92/08233 PCT/EP91/02058 ~ 6 In the drawings, Fig. 1 shows a shielding cover in longitudinal section with open shielding shaft ~:
ig. 2 shows a shielding cover in longitudinal section with closed shielding shaft ig. 3 shows a section along the lines I-I of the shielding cover shown in Fig. 2.
A shielding cover (1) has a block-like shielding section
(2) whose longer sides are disposed vertical. The shielding section (2) surrounds a shielding shaft (3) and is open at its lower end. The lower end of the shielding section (3) is seated on a block-like housing part (4) whose greater length is disposed horizontal. The shielding shaft (3) is continued in the housing part t4), which has an aperture (5) into the interior of the shielding section (2). The housing part ((4) is disposed unsymmetrical to the longitudinal axis (6) of the shielding section (2). The rectanguIar cross-section of the housing part (4) is greater than the cross-section of the shielding section (2). For this reason, the housing part projects beyond the outer walls of the shielding section (2) on all sides.
Thanks to the unsymmetrical arrangement of the housing part (4) in relation to the longitudinal axis (6), a housing section (7~ of the housing part (4) is obtained that projects laterally to a greater extent compared with the shielding section (2). An aperture (8) is provided on the underside of the housing part (4) underneath the aperture (5) in the shielding section (2), and has a cross-section slightly greater than that of the aperture (5). A spacer support (9) is connected at the bottom of the aperture (8), and is hollow and open at the bottom. The height of the spacer support (9) is mabched to the height of the cast containers (lO), which contain channel drums (12) placed on distance supports (11). The channel drums (12) are intended 209~24~
~^ 92/08233 PCT/EP91/02058 to hold radioactive materials, in particular waste. The shielding cover (1) is intended for filling the channel drums (12) with these materials.
Inside the shielding cover (1), a claw (13) is suspended from a tackle line (14). The claw (13) is designed as an angle-ring claw with deflecting pulleys and is used to pick up baskets that are fillable with radioactive materials such as waste.
The walls of the shielding section (2) and of the housing part (4) preferably consist of C-steel (carbon steel). The insides of the shielding section (2) and of the housing part (4) can be lined with special steel.
The tackle line (14), a rope running over a pulley (15) on the upper side of the claw (13), passes through a slot (16) in the upper wall of the shielding section (2) to the drum (17) of an encapsulated rope drive (18) attached externally to the upper face of the shielding section (2) and hence accessible for inspection, servicing and repair worX
without risk from unacceptably high radiation.
In addition, the tackle line (14) can be indirectly or directly connected outside the shielding cover (1) to a weighing device such as a cell or beam, not illustrated, in order to measure the weight of the materials to be transferred or loaded, and if necessary to record and store this data at the same time.
In the device shown in Fig. 1, the claw (13) and a basket (19) picked up by this claw and shown as a dash-dotted line are inside the housing part (4). Figs. 2 and 3 show the claw (13) with a basket (19) in an upper end position, in which the basket (19) is in the lower part of the shielding section (2).
1^'~ 92/08233 8 PCT/EP91/~ 2 ~1 To pick up a basket (19), the claw (13) moves out of the housing part (4) at a suitable pickup point. The basket (19) is then moved to the upper end position shown in Figs.
2 and 3. For transferring the basket contents, the basket (19) is moved down to the level of the rim of the channel drum (12). The aperture (8) is not covered during basket pic~up and loading of the basket contents.
If a basket pickup or transfer of the basket contents does not take place, and if the basket (19) is in the upper end position shown in Figs. 2 and 3, the aperture (8) is covered by a lid (20). This lid (20) is the closure for the container (10) to be loaded. The second function of the lid (20) as the closing element for the shielding cover (1) is achieved by the following measures.
The aperture (8) can be adapted to lids of varying sizes.
For this purpose, adapters such as adapter rings that have been matched to the lid dimensions can be provided in, underneath or above the aperture (8).
The lid (20), whose horizontal dimensions are adapted to the cross-section of the aperture (8) or of the adapter ring or similar, has on its upper face, in the center, a neck (21) with a head (22) mounted in a holder (23). The holder (23) grips the head (22) round its lower edge. In this way, the lid (20) is suspended with a joint in the center. The holder (23) is fastened to the underside of a support plate (24) of rectangular design. Two vertical bars (25) are fastened by their lower ends close to two diametrically opposite corners of the support plate (24).
The bars (25) are mounted in cylindrical guides (26) fastened to the beam (27) for axial movement. The ends of threaded spindles (28) guided in threaded bushes, not shown in detail, are fastened close to the other corners of the support plate (24), with the threaded bushes being rotatably mounted in a housing (29) fastened to the beam (27). The outsides of these threaded bushes are formed as a 209~241 r~ 92/08233 9 PCT/EP91/02058 gear wheel with helical gearing. The gear wheels interact with threaded sections o shafts (30) mounted horizontally rotatable and driven by a motor (31) that has shaft ends (32) projecting on both sides out of the motor housing. One shaft end (32) is connected to the shafts (30). The other shaft -end is, in a certain setting of the motor (31), externally accessible via a closable opening (33) in the wall of the housing part (4) of the shielding cover, using a socket wrench, for example, in order to ensure rotation of the shafts (30) in the event of a failure by the motor (31). When the motor (31) is working properly, the opening (33) is closed by a plug, not designated in detail.
The support plate (24) with the guides (26), the threaded spindles (28), the threaded bushes, the shafts (30) and the motor (31) form a lifting drive disposed on the beam (27) for lifting the lid (20), the wall thickness of the lid (20) being dimensioned such that the aforementioned dose rates are not exceeded on the outside. The lifting drive can move the lid (20) in the direction of the longitudinal axis (6). The lid (20) has an annular projection (34) extending downwards.
The beam (27) is disposed in the housing part (4) for transverse movement in relation to the longitudinal axis (6), i.e. movable in the horizontal direction. In a first lateral end position, shown in Fig. 1, the lid (20) including the beam (27) and the lifting drive connected to the beam (27) are located in the housing section (7) of the housing part (4) outside the vertical zone in which the claw (13) and the basket (19) can be moved up and down. In the second end position, shown in Fig. 2, the lid (20) and the beam (27) with the liftinq drive are in the zone intended for upward and downward movement of the claw (13) and of the basket (19). The lid (20) closes the aperture (8) and shields the contents of the basket (l9). In the second end position of the lid (20), the claw (13) and the basket (19) take up their upper end position, in which they are located in the shielding section (2).
~'') 92/08233 PCT/EP91~ 2 41 A block (35) having a threaded hole not designated in detail and an axial guide bearing is fastened to the beam (27). A threaded spindle (36) that is rotatably mounted on one side inside the housing part (4) and projects at one end out of the housing part (4) engages in the threaded hole. This pxojecting end is connected to a shaft (37) of a geared motor (38) fastened to the outside of the housing part (4). The axial guide bearing surrounds a guide rod (39) disposed inside the housing part (4). The threaded spindle (36) and the guide rod (39) are disposed close to an inner wall of the housing part (4), outside the vertical zone for the claw (13). Wheels (40) are rotatably mounted on the sides of the beam (27) and run on rails (41) fastened to inner walls (42), (43) of the housing part (4).
The geared motor (38) drives the beam (27) via the threaded spindle (36). Depending on the direction of rotation of the geared motor (38), the beam (27) moves from the first end position to the second end position or vice versa. In the event of a failure of the geared motor (38), the threaded spindle (36) can be turned manually from the outside, so that the lid (20) can be moved to a position as required.
Furthermore, the geared motor (38) on the outside of the housing part (4) is easily accessible for inspection, servicing and repair purposes. Dangerous radiation exposure is therefore avoided during this work.
A flat fluid acceptance tank (44) is movably mounted transverse to the longitudinal axis (6) on the bottom of the housing part (4). Wheels (45) are fastened to the flat sides of the fluid acceptance tank and run on rails (46) attached to the inner walls (42), (43). A drive block (47) containing a threaded hole not designated further and a cylindrical guide is fastened to a flat side of the fluid acceptance tank. A threaded spindle (48) rotatably mounted in the housing part (4) and having one end extending out of the housing part (4) engages in the threaded hole. A guide rod (49) permanently fitted in the housing part (4) is inserted into the guide. The guide rod ~49) ensures a 92/08233 PCT/Epgl/02~0~ 5 2 41 straight-line movement of the fluid acceptance tank (44).
The end of the threaded spindle (48) projecting from the housing part (4) is connected to a drive shaft, not shown in detail, of a geared motor (50) fastened to the outside of the housing part (4). The geared motor on the outside of the shielding cover (1) is therefore easily accessible for inspectionj servicing and repair work, i.e. dangerous radiation exposure is avoided during such work.
The geared motor (50) drives the threaded spindle (48) that moves the fluid acceptance tank (44) via the drive block (47). In a first end position in the lateral housing section (7) of the housing part (4), the fluid acceptance tank (44) is positioned next to the aperture (8).
Unhindered upward and downward movement of the claw (13) and of the basket (19) is therefore possible.
In a second end position, the fluid acceptance tank (44) is above the aperture (8) and covers the latter. The fluid acceptance tank (44) has a collecting cross-section which at least equals the horizontal extension of the lid (20).
8efore the channel drum (12) is filled with the contents of the basket (19), the fluid acceptance tank (44) is used to collect drip water and crud particles from the basket (19).
This protects the top part of the cast container (10) and the flange of the channel d~um (12) from being wetted by drip water and crud particles.
When the claw (13) and the basket (19) are inside the shielding section (2) and the lid (20) is covering the aperture (8), the fluid acceptance tank (44) is between the underside of the lid (20) and the aperture (8). The underside of the projection (34) can if necessary be in contact with the bottom of the fluid acceptance tank (44) here. The fluid acceptance tank (44) still has sufficient room in it for collecting the fluid dripping from the basket. The fluid acceptance tank (44) has a water drain line, not shown in detail. The fluid acceptance tank (44) can therefore be rinsed out if necessary.
209~241 ~ 12 Close to the upper end of the shielding section ( 2) is a waste air line connection (51) in the form of a connector, via which the interior of the shielding cover (1) can be connected to a building ventilation system of a reactor building.
The shielding cover (1) also has a decontamination plug for insertion of a high-pressure lance. The interior of the shielding cover (1) than therefore be cleaned using water under high pressure.
The parts inside the shielding cover (1) are best made of special steel in order to prevent corrosion. It is also possible to achieve protection from corrosion with coatings that are corrosion-resistant, easy to decontaminate, high-pressure waterproof and multi-layer. Those parts performing sliding movements in relation to one another, e.g. the threaded spindles (28), (36), (4~), the guide rods (39), (49~, the bars (25), the block (3S), the drive block (47) and the wheel`s (40), (45) are preferably made of special steel.
The shielding cover (1) contains, on the outside of the shielding section (2), two load attachment points (52), (53) for a two-strap suspension tackle using which the shielding cover is suspended from a crane.
Inside the shielding cover (1), sensors are provided for picking up certain positions of the claw (13~, of the beam (27), of the support plate (24) and of the fluid acceptance tank (44). The sensors can be limit switches. In particular, sensors are provided for determining the upper end position of the claw (13), the upper and lower end positions of the support plate (24), the first and second end positions of the beam (27) and the first and second end ~ ~-positions of the fluid acceptance tank (44). These sensors, not shown in detail, are connectable using cables and plugs to a control unit ~ith an indicating device. The control 92/08233 13 pcT/Epsl/~
unit is used to interlock safety-relevant approach and working positions. For example, interlocking prevents the beam (27) with the lid (20) and the fluid acceptance tank (44) being moved into the transport zone of the claw (13) unless the claw (13) is suspended in its upper end position. When the shielding cover (1~ is transported by rail or road or stored elsewhere, for example, a bolt-on floor plate with inserted seal closes off the aperture (8).
With the shielding cover (1) described above, it is possible after insertion of the respective basket (19) into the shielding shaft (3) to close the aperture (8) quickly and easily by remote control while shielding the radiation emanating from the load in the basket (19). When the shielding cover (1) has arrived at the unloading point, the aperture (8) can be released quickly in a short time. This facilitates handling of the shielding cover (1). The transport capacity can be increased thanks to the time saving from rapid closing and opening of the access to the shielding cover.
The housing part (4) has, on its side facing away from the shielding section (2) a removable lid (54), after removal of which the interior of the housing part (4) is visible or accessible for inspection.
The housing section (7) can furthermore have, for material saving reasons, stepped shielding, as indicated by the `~
horizontal beams of differing length shown in Figs. 1 and 2.
Thanks to the unsymmetrical arrangement of the housing part (4) in relation to the longitudinal axis (6), a housing section (7~ of the housing part (4) is obtained that projects laterally to a greater extent compared with the shielding section (2). An aperture (8) is provided on the underside of the housing part (4) underneath the aperture (5) in the shielding section (2), and has a cross-section slightly greater than that of the aperture (5). A spacer support (9) is connected at the bottom of the aperture (8), and is hollow and open at the bottom. The height of the spacer support (9) is mabched to the height of the cast containers (lO), which contain channel drums (12) placed on distance supports (11). The channel drums (12) are intended 209~24~
~^ 92/08233 PCT/EP91/02058 to hold radioactive materials, in particular waste. The shielding cover (1) is intended for filling the channel drums (12) with these materials.
Inside the shielding cover (1), a claw (13) is suspended from a tackle line (14). The claw (13) is designed as an angle-ring claw with deflecting pulleys and is used to pick up baskets that are fillable with radioactive materials such as waste.
The walls of the shielding section (2) and of the housing part (4) preferably consist of C-steel (carbon steel). The insides of the shielding section (2) and of the housing part (4) can be lined with special steel.
The tackle line (14), a rope running over a pulley (15) on the upper side of the claw (13), passes through a slot (16) in the upper wall of the shielding section (2) to the drum (17) of an encapsulated rope drive (18) attached externally to the upper face of the shielding section (2) and hence accessible for inspection, servicing and repair worX
without risk from unacceptably high radiation.
In addition, the tackle line (14) can be indirectly or directly connected outside the shielding cover (1) to a weighing device such as a cell or beam, not illustrated, in order to measure the weight of the materials to be transferred or loaded, and if necessary to record and store this data at the same time.
In the device shown in Fig. 1, the claw (13) and a basket (19) picked up by this claw and shown as a dash-dotted line are inside the housing part (4). Figs. 2 and 3 show the claw (13) with a basket (19) in an upper end position, in which the basket (19) is in the lower part of the shielding section (2).
1^'~ 92/08233 8 PCT/EP91/~ 2 ~1 To pick up a basket (19), the claw (13) moves out of the housing part (4) at a suitable pickup point. The basket (19) is then moved to the upper end position shown in Figs.
2 and 3. For transferring the basket contents, the basket (19) is moved down to the level of the rim of the channel drum (12). The aperture (8) is not covered during basket pic~up and loading of the basket contents.
If a basket pickup or transfer of the basket contents does not take place, and if the basket (19) is in the upper end position shown in Figs. 2 and 3, the aperture (8) is covered by a lid (20). This lid (20) is the closure for the container (10) to be loaded. The second function of the lid (20) as the closing element for the shielding cover (1) is achieved by the following measures.
The aperture (8) can be adapted to lids of varying sizes.
For this purpose, adapters such as adapter rings that have been matched to the lid dimensions can be provided in, underneath or above the aperture (8).
The lid (20), whose horizontal dimensions are adapted to the cross-section of the aperture (8) or of the adapter ring or similar, has on its upper face, in the center, a neck (21) with a head (22) mounted in a holder (23). The holder (23) grips the head (22) round its lower edge. In this way, the lid (20) is suspended with a joint in the center. The holder (23) is fastened to the underside of a support plate (24) of rectangular design. Two vertical bars (25) are fastened by their lower ends close to two diametrically opposite corners of the support plate (24).
The bars (25) are mounted in cylindrical guides (26) fastened to the beam (27) for axial movement. The ends of threaded spindles (28) guided in threaded bushes, not shown in detail, are fastened close to the other corners of the support plate (24), with the threaded bushes being rotatably mounted in a housing (29) fastened to the beam (27). The outsides of these threaded bushes are formed as a 209~241 r~ 92/08233 9 PCT/EP91/02058 gear wheel with helical gearing. The gear wheels interact with threaded sections o shafts (30) mounted horizontally rotatable and driven by a motor (31) that has shaft ends (32) projecting on both sides out of the motor housing. One shaft end (32) is connected to the shafts (30). The other shaft -end is, in a certain setting of the motor (31), externally accessible via a closable opening (33) in the wall of the housing part (4) of the shielding cover, using a socket wrench, for example, in order to ensure rotation of the shafts (30) in the event of a failure by the motor (31). When the motor (31) is working properly, the opening (33) is closed by a plug, not designated in detail.
The support plate (24) with the guides (26), the threaded spindles (28), the threaded bushes, the shafts (30) and the motor (31) form a lifting drive disposed on the beam (27) for lifting the lid (20), the wall thickness of the lid (20) being dimensioned such that the aforementioned dose rates are not exceeded on the outside. The lifting drive can move the lid (20) in the direction of the longitudinal axis (6). The lid (20) has an annular projection (34) extending downwards.
The beam (27) is disposed in the housing part (4) for transverse movement in relation to the longitudinal axis (6), i.e. movable in the horizontal direction. In a first lateral end position, shown in Fig. 1, the lid (20) including the beam (27) and the lifting drive connected to the beam (27) are located in the housing section (7) of the housing part (4) outside the vertical zone in which the claw (13) and the basket (19) can be moved up and down. In the second end position, shown in Fig. 2, the lid (20) and the beam (27) with the liftinq drive are in the zone intended for upward and downward movement of the claw (13) and of the basket (19). The lid (20) closes the aperture (8) and shields the contents of the basket (l9). In the second end position of the lid (20), the claw (13) and the basket (19) take up their upper end position, in which they are located in the shielding section (2).
~'') 92/08233 PCT/EP91~ 2 41 A block (35) having a threaded hole not designated in detail and an axial guide bearing is fastened to the beam (27). A threaded spindle (36) that is rotatably mounted on one side inside the housing part (4) and projects at one end out of the housing part (4) engages in the threaded hole. This pxojecting end is connected to a shaft (37) of a geared motor (38) fastened to the outside of the housing part (4). The axial guide bearing surrounds a guide rod (39) disposed inside the housing part (4). The threaded spindle (36) and the guide rod (39) are disposed close to an inner wall of the housing part (4), outside the vertical zone for the claw (13). Wheels (40) are rotatably mounted on the sides of the beam (27) and run on rails (41) fastened to inner walls (42), (43) of the housing part (4).
The geared motor (38) drives the beam (27) via the threaded spindle (36). Depending on the direction of rotation of the geared motor (38), the beam (27) moves from the first end position to the second end position or vice versa. In the event of a failure of the geared motor (38), the threaded spindle (36) can be turned manually from the outside, so that the lid (20) can be moved to a position as required.
Furthermore, the geared motor (38) on the outside of the housing part (4) is easily accessible for inspection, servicing and repair purposes. Dangerous radiation exposure is therefore avoided during this work.
A flat fluid acceptance tank (44) is movably mounted transverse to the longitudinal axis (6) on the bottom of the housing part (4). Wheels (45) are fastened to the flat sides of the fluid acceptance tank and run on rails (46) attached to the inner walls (42), (43). A drive block (47) containing a threaded hole not designated further and a cylindrical guide is fastened to a flat side of the fluid acceptance tank. A threaded spindle (48) rotatably mounted in the housing part (4) and having one end extending out of the housing part (4) engages in the threaded hole. A guide rod (49) permanently fitted in the housing part (4) is inserted into the guide. The guide rod ~49) ensures a 92/08233 PCT/Epgl/02~0~ 5 2 41 straight-line movement of the fluid acceptance tank (44).
The end of the threaded spindle (48) projecting from the housing part (4) is connected to a drive shaft, not shown in detail, of a geared motor (50) fastened to the outside of the housing part (4). The geared motor on the outside of the shielding cover (1) is therefore easily accessible for inspectionj servicing and repair work, i.e. dangerous radiation exposure is avoided during such work.
The geared motor (50) drives the threaded spindle (48) that moves the fluid acceptance tank (44) via the drive block (47). In a first end position in the lateral housing section (7) of the housing part (4), the fluid acceptance tank (44) is positioned next to the aperture (8).
Unhindered upward and downward movement of the claw (13) and of the basket (19) is therefore possible.
In a second end position, the fluid acceptance tank (44) is above the aperture (8) and covers the latter. The fluid acceptance tank (44) has a collecting cross-section which at least equals the horizontal extension of the lid (20).
8efore the channel drum (12) is filled with the contents of the basket (19), the fluid acceptance tank (44) is used to collect drip water and crud particles from the basket (19).
This protects the top part of the cast container (10) and the flange of the channel d~um (12) from being wetted by drip water and crud particles.
When the claw (13) and the basket (19) are inside the shielding section (2) and the lid (20) is covering the aperture (8), the fluid acceptance tank (44) is between the underside of the lid (20) and the aperture (8). The underside of the projection (34) can if necessary be in contact with the bottom of the fluid acceptance tank (44) here. The fluid acceptance tank (44) still has sufficient room in it for collecting the fluid dripping from the basket. The fluid acceptance tank (44) has a water drain line, not shown in detail. The fluid acceptance tank (44) can therefore be rinsed out if necessary.
209~241 ~ 12 Close to the upper end of the shielding section ( 2) is a waste air line connection (51) in the form of a connector, via which the interior of the shielding cover (1) can be connected to a building ventilation system of a reactor building.
The shielding cover (1) also has a decontamination plug for insertion of a high-pressure lance. The interior of the shielding cover (1) than therefore be cleaned using water under high pressure.
The parts inside the shielding cover (1) are best made of special steel in order to prevent corrosion. It is also possible to achieve protection from corrosion with coatings that are corrosion-resistant, easy to decontaminate, high-pressure waterproof and multi-layer. Those parts performing sliding movements in relation to one another, e.g. the threaded spindles (28), (36), (4~), the guide rods (39), (49~, the bars (25), the block (3S), the drive block (47) and the wheel`s (40), (45) are preferably made of special steel.
The shielding cover (1) contains, on the outside of the shielding section (2), two load attachment points (52), (53) for a two-strap suspension tackle using which the shielding cover is suspended from a crane.
Inside the shielding cover (1), sensors are provided for picking up certain positions of the claw (13~, of the beam (27), of the support plate (24) and of the fluid acceptance tank (44). The sensors can be limit switches. In particular, sensors are provided for determining the upper end position of the claw (13), the upper and lower end positions of the support plate (24), the first and second end positions of the beam (27) and the first and second end ~ ~-positions of the fluid acceptance tank (44). These sensors, not shown in detail, are connectable using cables and plugs to a control unit ~ith an indicating device. The control 92/08233 13 pcT/Epsl/~
unit is used to interlock safety-relevant approach and working positions. For example, interlocking prevents the beam (27) with the lid (20) and the fluid acceptance tank (44) being moved into the transport zone of the claw (13) unless the claw (13) is suspended in its upper end position. When the shielding cover (1~ is transported by rail or road or stored elsewhere, for example, a bolt-on floor plate with inserted seal closes off the aperture (8).
With the shielding cover (1) described above, it is possible after insertion of the respective basket (19) into the shielding shaft (3) to close the aperture (8) quickly and easily by remote control while shielding the radiation emanating from the load in the basket (19). When the shielding cover (1) has arrived at the unloading point, the aperture (8) can be released quickly in a short time. This facilitates handling of the shielding cover (1). The transport capacity can be increased thanks to the time saving from rapid closing and opening of the access to the shielding cover.
The housing part (4) has, on its side facing away from the shielding section (2) a removable lid (54), after removal of which the interior of the housing part (4) is visible or accessible for inspection.
The housing section (7) can furthermore have, for material saving reasons, stepped shielding, as indicated by the `~
horizontal beams of differing length shown in Figs. 1 and 2.
Claims (18)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method for transporting materials such as radio-active waste by means of a shielding cover (1) having a bottom aperture (8) closable with a lid (20), said cover having a radiation-shielding housing part (7) projecting at least on one side, where said lid (20) is movable transverse to the longitudinal axis (6) of the shielding cover and is raisable and lowerable in the direction of said longitudinal axis, and is disposed in a first end position in the lateral projection of said housing part and above said aperture in a second end position, and where a container (10) closable with said lid (20) is disposed underneath said aperture of said shielding cover for filling or unloading of said container (10) with said materials, w h e r e i n said lid (20) of said container (10) disposed underneath said bottom aperture (8) is used for said shielding cover (1).
2. A method for implementation of the method according to Claim 1, having a pulling element (14) such as a tackle line, on whose free end disposed in the interior of said shielding cover (1) is disposed a claw element (13) for receptacles such as baskets (19) to hold preferably radioactive materials such as waste which are insertable via a bottom aperture (8) of said shielding cover into the latter or unloadable from said shielding cover for insertion into a container (10) closable by a lid, where said shielding cover is provided with a radiation-shielding housing part (7) projecting at least on one side, and where a lid is provided movable transversely to the longitudinal axis of the shielding cover, raisable and lowerable in the direction of the longitudinal axis (6), and shielding against radiation in a first end position in the lateral projection of said housing part and disposed above said aperture in a second end position, w h e r e i n said movable lid (20) inside said shielding cover (1) is that of the container (10) and wherein a fluid acceptance tank (44) disposed movable transverse to said longitudinal axis (6) and disposed in a first end position in the lateral projection of said housing part (4) and in a second end position on or above said aperture (8), is disposed underneath said lid when said lid is disposed inside said shielding cover (1).
3. A shielding cover according to Claim 2, w h e r e i n said lid (20) is suspended from a support plate (24) with a joint in the center and is movable by a lifting drive along vertical guides, and wherein said guides and said lifting drive are connected to a beam (27) movable along horizontal rails (41).
4. A shielding cover according to Claim 3, w h e r e i n said movable beam (27) is connected via a block (35) to a threaded hole with a rotatably mounted threaded spindle (36), one end of which projects out of said housing part (4) and is connected to a geared motor (38) fastened to the outside of said housing part (4).
5. A shielding cover according to Claim 3, w h e r e i n said support plate (24) is connected, at two points diametrically opposite to one another in relation to the suspension of said lid (20), to ends of threaded spindles (28) inserted into threaded bushes of said beam (27) that are rotatably mounted on said beam (27) and are connected by shafts (30) to a motor (31) fastened to said beam (27), said motor (31) having shaft ends (32) projecting from both sides of its housing, one of said ends being aligned flush with an opening (33) in the wall of said shielding cover (1) in the second end position of said lid (20), and wherein said opening (33) is closable using a plug.
6. A shielding cover according to one or more of the preceding claims, w h e r e i n said fluid acceptance tank (44) is provided on its sides with wheels (45) that run on rails (46), and wherein one side of said fluid acceptance tank (44) has fastened to it a drive block (47) having a threaded hole in which a threaded spindle (48) is mounted, one end of which projects from said housing part (4) and is connected to a geared motor (50) fastened to the outside of said housing part (4).
7. A shielding cover according to one or more of the preceding claims, w h e r e i n said fluid acceptance tank (44) is connected to a water drain line.
8. A shielding cover according to one or more of the preceding claims, w h e r e i n a waste air connection (51) is provided near to the upper end of said shielding cover (1).
9. A shielding cover according to one or more of the preceding claims, w h e r e i n said shielding cover has a decontamination plug in one wall for connection of a high-pressure lance.
10. A shielding cover according to one or more of the preceding claims, w h e r e i n at least the upper end position of said claw (13), the first and second end positions of said lid (20) and the upper and lower end positions of said lid (20) can be picked up by sensors whose response is indicated at a control unit connected to said shielding cover (1) by cable.
11. A shielding cover according to one or more of the preceding claims, w h e r e i n said shielding cover is lined in its interior with special steel.
12. A shielding cover according to one or more of the preceding claims, w h e r e i n attachment points (52, 53) for a two-strap suspension tackle are disposed near to the upper end.
13. A shielding cover according to one or more of the preceding claims, w h e r e i n at least said threaded spindles (28, 36, 48), the guide rods (39, 49) for said beam (27) and said fluid acceptance tank (44), and the wheels (40, 45) of said beam and of said fluid acceptance tank (44), are of special steel.
14. A shielding cover according to one or more of the preceding claims, w h e r e i n those parts not consisting of special steel in the interior of said shielding cover (1) are covered with a multi-layer coating of corrosion-resistant, easy to decontaminate and high-pressure waterproof material.
15. A shielding cover according to Claim 2 at least, w h e r e i n a rope drive (18) operating a tackle line is fastened in encapsulated form to the outside of said shielding cover (1), and wherein said tackle line passes through a slot (16) in said shielding cover (1).
16. A shielding cover according to Claim 2 at least, w h e r e i n said shielding cover aperture (8) is adaptable to container lids of varying dimensions.
17. A shielding cover according to Claim 16, w h e r e i n adaptation is achieved using adapter rings.
18. A shielding cover according to Claim 2 at least, w h e r e i n said lifting device (14) for the receptacle (19) to hold the radioactive materials is connected to a weighing device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4034719A DE4034719A1 (en) | 1990-11-01 | 1990-11-01 | SHIELD BELL |
| DEP4034719.2 | 1990-11-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2095241A1 true CA2095241A1 (en) | 1992-05-02 |
Family
ID=6417429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002095241A Abandoned CA2095241A1 (en) | 1990-11-01 | 1991-10-30 | Shielding cover |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0555272B1 (en) |
| JP (1) | JPH06502242A (en) |
| KR (1) | KR930702767A (en) |
| CA (1) | CA2095241A1 (en) |
| DE (2) | DE4034719A1 (en) |
| ES (1) | ES2073773T3 (en) |
| SK (1) | SK37193A3 (en) |
| WO (1) | WO1992008233A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4445171C2 (en) * | 1994-12-16 | 2002-05-29 | Bbc Reaktor Gmbh | Process for disassembling bulky parts of pressure vessel internals of a nuclear facility and for picking up the disassembled parts |
| DE19529357A1 (en) * | 1995-08-09 | 1997-02-13 | Nukem Gmbh | Underground storage facility and process for the temporary storage of waste |
| DE19840492A1 (en) * | 1998-09-04 | 2000-03-09 | Steag Kernenergie Gmbh | Docking device for connecting a transport and / or storage container to a radioactive work space |
| CN113077917B (en) * | 2021-03-23 | 2024-03-22 | 中国原子能科学研究院 | Radioactive sample transfer device and transfer system |
| CN113012840B (en) * | 2021-03-23 | 2024-05-14 | 中国原子能科学研究院 | Shielding device for radioactive article transportation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1226659A (en) * | 1959-02-26 | 1960-07-15 | Soc Indatom | Improvements to receptacles intended to transport radioactive bodies |
| DE2729615A1 (en) * | 1977-06-30 | 1979-01-11 | Kraftwerk Union Ag | Irradiated fuel element container - has suspension adaptor to hold it firmly in storage or transportation plant |
| DE3248595A1 (en) * | 1982-12-30 | 1984-07-12 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe | Accident shield for the charging openings of a transport flask for moulds with highly radioactive waste |
| FR2560710B1 (en) * | 1984-03-02 | 1986-11-07 | Sgn Soc Gen Tech Nouvelle | METHOD FOR TRANSFERRING OBJECT WITHOUT CONTAINMENT BREAK |
| FR2573908B1 (en) * | 1984-11-26 | 1986-12-26 | Cogema | DEVICE FOR TRANSFERRING DOUBLE SEALED BARRIER BETWEEN A CONTAINER AND A CONTAINMENT ENCLOSURE |
| DE3920534A1 (en) * | 1989-06-22 | 1991-01-10 | Siemens Ag | Nuclear waste container transfer unit - has equipment for direct transfer into ambient air cooled containers in concrete silos |
-
1990
- 1990-11-01 DE DE4034719A patent/DE4034719A1/en not_active Withdrawn
-
1991
- 1991-10-30 DE DE59105632T patent/DE59105632D1/en not_active Expired - Fee Related
- 1991-10-30 SK SK37193A patent/SK37193A3/en unknown
- 1991-10-30 WO PCT/EP1991/002058 patent/WO1992008233A1/en active IP Right Grant
- 1991-10-30 ES ES91918548T patent/ES2073773T3/en not_active Expired - Lifetime
- 1991-10-30 CA CA002095241A patent/CA2095241A1/en not_active Abandoned
- 1991-10-30 KR KR1019930701325A patent/KR930702767A/en not_active Application Discontinuation
- 1991-10-30 EP EP91918548A patent/EP0555272B1/en not_active Expired - Lifetime
- 1991-10-30 JP JP3517669A patent/JPH06502242A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| SK37193A3 (en) | 1993-07-07 |
| KR930702767A (en) | 1993-09-09 |
| ES2073773T3 (en) | 1995-08-16 |
| JPH06502242A (en) | 1994-03-10 |
| DE59105632D1 (en) | 1995-07-06 |
| WO1992008233A1 (en) | 1992-05-14 |
| EP0555272A1 (en) | 1993-08-18 |
| EP0555272B1 (en) | 1995-05-31 |
| DE4034719A1 (en) | 1992-05-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |