JPH0636078B2 - Object moving method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] According to the present invention, an object is moved along an axis of movement between a contaminated area A and a non-contaminated area B which is a movable enclosure accommodating the object. The present invention relates to an object moving method and apparatus.

PRIOR ART In nuclear power plants, areas containing harmful substances are separated from areas in which humans are present by thick walls and shields.

The hazardous area is commonly referred to as the reactive area of the plant. Radioactive products present in this area include gamma emitters that justify thick containment walls, and / or alpha and beta emitters that are considered contaminants. All equipment remaining in the reactive areas is considered to be contaminated, and on the back of a thick wall (to protect against gamma rays) and within a sealed enclosure (to avoid diffusion of contamination). Must be placed in

When the equipment in the reactive area has to be replaced or removed and moved to the maintenance tank,
Or vice versa, when attempting to return the device to its operative position, complete confinement must be maintained during the transfer procedure to avoid the spread of contamination. Also, since the equipment is moved to a maintenance or repair tank, it is important to maintain sufficient wall thickness as a biological shield between the equipment and the plant personnel.

[Problems to be Solved by the Invention] The present invention has been made in view of the above circumstances, and is an "object" such as a device member, a machine component, a waste drum, or the like.
Are transported or transported between a reactive area or a confined area and a clean area, and the object is always separated from the clean area and the reactive area while satisfying the confined and biological safety conditions. An object of the present invention is to provide an object moving method and apparatus that can move between objects.

[Means and Actions for Solving the Problems] In the object moving method according to the present invention, a contaminated area A and a non-contaminated area B are separated by a shielding plate having a stopper arranged on a moving axis, and the stopper is provided. A method of moving an object in which an object to be moved is coupled and the object is washed and held in the area B while the object is conveyed and moved along the axis of movement between the area A and the area B. Forming a front enclosure located above and in the area B with two opposite plugs, each of which is located on the plug, and b) located on the opposite side of the shield plate from the plug. A movable enclosure that is closely mounted on the front enclosure, comprising a closure that contacts the closure of the front enclosure, and c) a first pair of which directly contacts the closure of the shield and A plug of the front enclosure, and a second pair of plugs of the movable enclosure and directly therewith. Connecting the plugs to each other to form two fixed pairs of plugs of the front enclosure in abutting contact, d) the second pair of plugs being transverse to the axis of movement within the front enclosure. E) fixing the first pair of bungs and objects in the zone A such that they are displaceable to the movable enclosure, and carrying them all to the movable enclosure, f) Refitting the second pair of plugs into the plug holes of the movable enclosure and the front envelope along the axis of movement to separate the two plugs and place the two plugs in each hole. Individually fixed, g) moving the movable enclosure containing the first pair of stoppers and the object to another position, and the contaminated area A by means of a shield plate with stoppers arranged on the axis of movement. And the uncontaminated area B are separated, an object to be moved is coupled to the stopper, and the object is moved along the movement axis to the area. A method of moving an object for cleaning and holding the area B while transporting and moving between the area A and the area B, comprising the steps of: To form a front enclosure disposed in the area B, and b) a front enclosure including a stopper that is in contact with a stopper of the front enclosure located on the opposite side of the shield plate from the stopper. A movable enclosure tightly mounted above, c) a first pair of which comprises a closure of the shield and a closure of the front enclosure in direct contact therewith, and a second pair of which is movable. Connecting the stoppers to each other to form two fixed pairs of a stopper of the enclosure and a stopper of the front enclosure in direct contact therewith, d) connecting the second pair of stoppers within the front enclosure Laterally with respect to the axis of movement, e) so as to be movable into the movable enclosure, And fixing the objects in said zone A and transporting them all to said movable enclosure, f) said second pair of stoppers along said axis of movement said movable enclosure and said front enclosure Reassembling each of the plug holes, separating the two plugs and individually securing the two plugs to each hole; g) a movable enclosure containing the first pair of plugs and the object. H) a movable enclosure which is densely installed on the front enclosure, including a stopper that comes into contact with a stopper of the front enclosure located on the opposite side of the shield plate from the stopper. , In the movable enclosure, the first
An object to be moved from the area B to the area A fixed to the pair of plugs, i) moving the movable enclosure onto the front enclosure, the movable enclosure closure and the front enclosure. Body plugs are joined together to form the second pair of plugs, j) transfer of the second pair of plugs transverse to the axis of movement within the front enclosure, k) The object fixed to the first pair of stoppers is moved along the movement axis until the first pair of stoppers are refitted into the holes of the front enclosure and the holes of the shielding plate, respectively. Move
These two plugs are separated from each other and fixed in their respective holes to seal area A, l) said second pair of plugs along said axis of movement of said movable enclosure and said front enclosure respectively. Refitting the plug holes, separating the two plugs, fixing the two plugs individually in each hole, and sealing the front enclosure and the movable enclosure that can be moved. This is a procedure.

Further, in the object moving device according to the present invention, a means for separating the contaminated area A and the non-contaminated area B by the shield plate having the stopper arranged on the movement axis, and connecting the stopper with the object to be moved. An object moving device for cleaning and holding the area B while transporting the object along the movement axis between the area A and the area B, comprising two stoppers facing each other. A front enclosure disposed in the area B, and a movable enclosure disposed in the area B, which includes a stopper and can accommodate an object to be moved. A first pair of plugs is formed by coupling one of the plugs of the partial enclosure and the shield plate, and a second pair of plugs is formed by coupling the other of the plugs of the movable enclosure. While the first pair of stoppers and the object are transported and moved between the area A and the movable enclosure. A mechanism in which the second pair of stoppers are moved laterally with respect to the movement axis in the front enclosure, the front enclosure being closely mounted on the shield plate, and the movable enclosure. Its main configuration is to maintain containment by closely packing the body on the front enclosure.

A first feature of the present invention consists in using a two-part device including a fixed front enclosure and a movable movable enclosure to maintain containment.

The front enclosure is maintained in place during the time it takes to pull the object, transfer the object to the bath, and return another object or return this object to a reactive area or containment after repair. .

The present invention will be described with respect to a reactive vessel which may be accessed through its top by a vertically performed transfer operation (over the wall process).

However, the same technique is applicable to all geometric arrangements, such as through walls or through floors.

Therefore, this description relates to a reactive vessel whose ceiling is a horizontal shield with a plug therein.

The top surface of the stopper is clean and must be kept clean. The inner surface of the plug is in the area of reactivity and is contaminated and is considered contaminated.

The object is hung from the bung, at least during movement. The dimensions of the object are assumed to be such that upon lifting of the plug, the object can be retracted through the unplugged opening.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows in cross-section a reactive vessel consisting of a horizontal shield 1 and a wall 2. The stopper 3 separates the reactive area 6 from the clean area 7.

The moving object 4 is hung from the stopper 3.

The movement is carried out along an axis 5, which is considered vertical for the sake of clarity.

FIG. 2 is a cross-sectional view showing the front enclosure cut along the axis of movement by a vertical plane.

The wall 10 both define a closed box containing two stoppers, a lower stopper 11 and an upper stopper 12, arranged along a vertical axis of movement.

Within the front enclosure, the carrier 14 can be moved horizontally by means of control rods 15. For the sake of clarity, the wheels of the carrier as well as the tracks on which they rotate are omitted from the schematic.

The interior longitudinal dimension 16 of the front enclosure is such that passage along the axis of travel is unobstructed when the bed is placed in position 17.

Platform positions 14 and 17 are referred to as left or left and right or right positions, respectively, throughout the description below. The sealing means 13 ensure a tight seal between the reactive vessel and the front enclosure.

It will be appreciated that the moveable enclosure comprises a tubular or trihedral mirror box having one or more walls 30 shown schematically in FIG. 3 and parallel to the axis of movement 36.

The top of the movable enclosure is a steel cord 32 sealed by a bellows 34.
It is closed except for the opening. The end of the steel rope 32 is provided with a hook 33.

The bottom of the movable enclosure has a removable plug 31 and a sealing member 35 for sealing between the movable enclosure and the front enclosure.
Is included.

Thus, when describing the physical features of the present invention, the principles of operation are described in terms of evicting an object from, for example, a bath.

The mutual arrangement of the components described above is shown in FIG. 4, and the transfer operation is explained in connection with the following figures.

Details that appear in some figures are designated with the same reference numerals.

In that case, the shield plate 40 at the top of the tank basically consists of a stopper 41 and a moving object 42 depending from the stopper 41.

The front enclosure 43 is placed on the shield on the vertical axis of movement.

The stoppers 44 and 46 are in place and the bed 45 is on the left.

The movable enclosure 47 is placed on the front enclosure 43 on the axis of movement.

Stopper 48 is in place and the barb is indicated at 49.

Note the fact that the wall thicknesses of the movable enclosure and the front enclosure, as well as the sealing means between the various components, are not specifically shown in the drawings.

FIG. 5 shows a first procedure in the movement of bringing the stoppers in pairs.

The bottom plug 44 of the front enclosure is secured onto the shield plate plug 41.

The movable enclosure bung 48 is secured onto the front enclosure top bung 46, and the assembled pair is placed in the bed.
A device not protected by the claims is used to lock and unlock the two stoppers by an outer control rod (not shown).

The purpose of this bond is to prevent contamination of the surface of the plug exposed in the clean area.

Thereafter, the carrier 45 is pulled to the right position as shown in FIG.

FIG. 7 shows a hook 49 sealed in a structure made up of stoppers 41 and 44 and an object 42. The bellows seal around the steel rope is not shown.

The structures 41, 42 are pulled by a steel rope within a movable enclosure 47, as shown in FIG. 8, after which the bed 45 is moved to the left position as shown in FIG.
Returned to block the opening at the top of the front enclosure as in FIG.

The movable enclosure 47 can then be grabbed and removed anywhere.

The containment is maintained throughout and the movable enclosure 47 is closed by the plug 48. The bottom surface of this stopper 48 is the front enclosure stopper 46.
It was never contaminated as it was always in contact with the clean top and was protected.

The front enclosure returns to its initial position to achieve closure of the bath due to contact (seal 13 in FIG. 2) and sealing of the top plug 46.

The devices used to pair the stoppers and lift the joined stoppers are not specifically shown and may be of any suitable known type.

The seals used between the tank and the front enclosure and between the front enclosure and the movable enclosure can preferably be three-way actuated seals.

FIG. 11 shows another embodiment of the present invention.

Alternatively, a movable enclosure having a bell-shaped or lined cap 50 that slides in engagement with the seal may be provided to avoid contamination of the interior of the enclosure.

The ascent and descent work is also carried out by a special chain with a pushing force, such as a "stiff" chain of locking links made by Therapid (France), housed in a tunnel attached to the enclosure. be able to.

That is, as shown in FIG. 11, the tunnel 60 attached to the enclosure 47 consists of a rigid chain 61 running on two sheaves 62, 63 which are guide wheels. For simplicity, the opposing sheaves and guides for the rigid chain links are not shown in the drawing.

While this device is advantageous in working in low overhead space, it is advantageous in assembling the stopper and object lifting means on the enclosure. In particular, it is expedient to transport the device 42 and drop it in a maintenance tank for repair or overhaul.

The above description has been described with respect to movement of an object that can be vertically and upwardly retreated. It will be clear to the person skilled in the art that the present invention has been shown to be able to be implemented vertically downwards to feed an object into a vessel, and that the same technique can be applied with minor modifications. The modifications are horizontal movement with stoppers placed on vertical walls, vertical movement with stoppers on the floor of the tank, and movement generally along a given axis.

The invention has been described in the context of nuclear installations. But,
It is also applicable to the movement of objects contaminated by chemical or bacteriological contamination.

EFFECTS OF THE INVENTION According to the present invention described above, objects such as device members, machine components, waste drums, etc., are transported or transported between a reactive area or a confined and clean area. It can be transported, and objects can be moved between the clean and reactive areas, always satisfying the confinement and biological safety requirements.

[Brief description of drawings]

1 is a cross-sectional view schematically showing a reactive tank, FIG. 2 is a cross-sectional view showing a front enclosure, FIG. 3 is a cross-sectional view showing a movable front enclosure, FIG. 4, FIG. , 6 and 7 are cross-sectional views schematically illustrating the position of the various plugs when the object is being withdrawn from the reactive vessel, and FIG. 8 is removed from the vessel and placed in the movable enclosure. 9 and 10 are cross-sectional views showing the opened object, FIG. 9 and FIG. 10 are cross-sectional views showing reinsertion of the stopper into the tank, and FIG. 11 and FIG. 12 are bell-shaped protective cap and push chain treatment in the movable enclosure. It is sectional drawing which shows another Example which has a means. In the figure, reference numerals 1 and 40 are horizontal shield plates, 2 is a wall, 3 and 41 and 48 are stoppers, 4 and 42 are objects, 5 is a shaft, 11 is a lower stopper, 12 is an upper stopper,
13 and 35 are sealing means, 14 and 45 are bed, 15 is control rod, 31 is removable plug, 43 is front enclosure, 47 is movable enclosure, and 50 is bell-shaped or lined cap.

Claims (15)

[Claims] 1. A contaminated area A and a non-contaminated area B are separated by a shield plate having a stopper arranged on a moving shaft, an object to be moved is coupled to the stopper, and the object is attached to the moving shaft. In the object moving method for cleaning and holding the area B while carrying and moving the area A and the area B along the following: a) two facing and respectively arranged on the moving axis and on the stopper. A front enclosure having a stopper arranged in the area B, b) comprising a stopper in contact with a stopper of the front enclosure located on the opposite side of the shield plate from the front, A movable enclosure tightly mounted on the partial enclosure, c) a first pair of which comprises a closure of said shield and a closure of said front enclosure in direct contact therewith, and a second pair Form two fixed pairs of a closure of the movable enclosure and a closure of the front enclosure in direct contact therewith D) moving the second pair of plugs laterally with respect to the axis of movement within the front enclosure, and e) moving the movable enclosure to the movable enclosure. Fixing one pair of stoppers and objects in said zone A and transporting them all to said movable enclosure, f) said second pair of stoppers along said axis of movement, said movable enclosure and Refit into each plug hole in the front enclosure, separate the two plugs and secure the two plugs individually in each hole, g) Accommodate the first pair of plugs and the object A method of moving an object, comprising moving the movable enclosure to another position. 2. The second pair of plugs are respectively coupled and then placed in or on the bed, and the bed is moved in a plane perpendicular to the movement axis. Item 1. The object moving method according to item 1. 3. The use of a bell or cup lining within the movable enclosure slidable on and operable to surround the body of the first pair of plugs and the body. The object moving method according to claim 2, wherein 4. Between the front enclosure and the movable enclosure,
The object moving method according to claim 2 or 3, wherein a space between the front enclosure and the shielding plate is sealed by a three-way seal. 5. A method of moving an object according to claim 4, including the use of a rigid chain having a pushing force to convey said first pair of stoppers with the moving object. . 6. A contaminated area A and a non-contaminated area B are separated by a shield plate having a stopper arranged on a moving shaft, an object to be moved is coupled to the stopper, and the object is attached to the moving shaft. A method of moving an object for cleaning and holding the area B while carrying and moving the area A and the area B along the following: a) facing each other, which are arranged on the moving axis and on the stopper 2 A front enclosure located in the area B with two closures, b) comprising a closure in contact with the closure of the front enclosure located opposite the closure of the shield plate, A movable enclosure tightly mounted on the front enclosure, c) a first pair of which comprises a closure of said shield and a closure of said front enclosure in direct contact therewith; A pair forms two fixed pairs of a plug of the movable enclosure and a plug of the front enclosure in direct contact therewith. D) transferring the second pair of plugs laterally with respect to the axis of movement within the front enclosure, and e) movably to the movable enclosure, Fixing a first pair of stoppers and objects in said zone A and transporting them all to said movable enclosure, f) said second pair of stoppers along said axis of movement And refitting each plug hole in the front enclosure to separate the two plugs and secure the two plugs individually in each hole, g) removing the first pair of plugs and the object. The movable enclosure to be housed is moved to another position, and h) is equipped with a stopper that comes into contact with the stopper of the front enclosure located on the side opposite to the stopper of the shielding plate, and is densely mounted on the front enclosure. A movable enclosure is configured, and the first enclosure is provided in the movable enclosure.
An object to be moved from the area B to the area A fixed to the pair of plugs, i) moving the movable enclosure onto the front enclosure, the movable enclosure closure and the front enclosure. Body plugs are joined together to form the second pair of plugs, j) transfer of the second pair of plugs transverse to the axis of movement within the front enclosure, k) The object fixed to the first pair of stoppers is moved along the movement axis until the first pair of stoppers are refitted into the holes of the front enclosure and the holes of the shielding plate, respectively. Move
These two plugs are separated from each other and fixed in their respective holes to seal area A, l) said second pair of plugs along said axis of movement of said movable enclosure and said front enclosure respectively. Refitting the plug holes, separating the two plugs, fixing the two plugs individually in each hole, and sealing the front enclosure and the movable enclosure that can be moved. How to move an object. 7. The combination of the second pair of plugs, after being respectively coupled, is placed in or on a luggage carrier, and the luggage carrier is moved in a plane perpendicular to the movement axis. Item 6. The object moving method according to item 6. 8. The use of a bell or cup lining within the movable enclosure slidable on and operable to surround the body of the first pair of plugs and the body. The object moving method according to claim 7, wherein: 9. Between the front enclosure and the movable enclosure,
The object moving method according to claim 7 or 8, wherein a space between the front enclosure and the shielding plate is sealed by a three-way seal. 10. The method of moving an object according to claim 9 including the use of a rigid chain having a pushing force to carry said first pair of stoppers with the moving object. . 11. A contaminated area A and a non-contaminated area B are separated by a shield plate (40) having a stopper (41) arranged on a movement axis, and the stopper (41) is coupled with an object to be moved. Means for moving the object along the axis of movement into the area A
An object moving device for cleaning and holding the zone B during the transfer between the zone B and the zone B, which comprises two stoppers (44) and (46) facing each other. A front enclosure (43) arranged and a movable enclosure (47) comprising a plug (48) and capable of accommodating an object to be moved, said movable enclosure (47) being arranged in said zone B, A first pair of plugs is formed by coupling one (44) of the plugs (44) and (46) of the front enclosure (43) with the plug (41) of the shielding plate (40) and the other (46). ) And the plug (48) of the movable enclosure (47) to form a second pair of plugs, wherein the first pair of plugs (41), (44) and the object are in the area A. While being transported between the movable enclosure and
The second pair of plugs (46), (48) has a mechanism that is moved laterally within the front enclosure (43) relative to the axis of movement, the front enclosure (43) being The movable enclosure (47) is closely arranged on the shield plate (40), and the movable enclosure (47) is formed on the enclosure (4).
3) An object moving device characterized in that it is tightly provided on the top to maintain the containment. 12. A mechanism within the front enclosure (43) is movable in a plane perpendicular to the axis of movement and is movable with the plug (46) of the front enclosure (43). Surrounding body (4
A second pair of plugs (46) consisting of the plugs (48) of 7),
The object moving device according to claim 11, wherein the object is a loading platform (45) on which the (48) is placed. 13. A bell within the movable enclosure (47) which is slidable on the body of the first pair of plugs (41), (44) and the body and is operable to surround it. Object moving device according to claim 12, characterized in that it has a strip or cup-shaped lining (50). 14. A three-way seal capable of sealing between the front enclosure (43) and the movable enclosure (47) and between the front enclosure (43) and the shield plate (40). The object moving device according to claim 12 or 13, characterized in that: 15. A rigid chain (61) having a pushing force for transporting the first pair of stoppers (41), (44) with an object to be moved. Object moving device according to claim 14.