JP2832511B2 - Receiving inspection device by measuring the outer shape of the round fuel assembly for the new converter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention measures the outer diameter, the bending of fuel rods, and the gap between fuel rods when a round fuel assembly for an advanced conversion reactor (ATR) is received. The present invention also relates to an acceptance inspection device for inspecting whether or not the outer shape satisfies a predetermined dimension.

[0002]

2. Description of the Related Art Heretofore, this kind of receiving apparatus has determined the displacement due to the movement by moving a measuring element of a differential transformer for measuring displacement with respect to the fuel rod surface until it comes into contact with the same. The method is adopted. That is,
The above-mentioned stylus is brought into contact with the outer circumferential fuel rod of the round fuel assembly, the length of the displaced stylus at this time is known, and thus the entire outer circumferential fuel rod is moved in the longitudinal direction. The displacement profile is determined, which measures the outer diameter of the round fuel assembly, the bending of the fuel rods, and the gap between the fuel rods.

As shown in FIG. 4, a round fuel assembly A to be subjected to the acceptance inspection is provided between an upper tie plate a and a lower tie plate b and has a large number of fuel rods c.
Are connected together with a required number of tie rods d (small-diameter hollow tubes) by a required number of spacers e, and have a circular outer periphery.

However, when using a differential transformer as described above, the probe must be mechanically moved and inspected until it comes into contact with the outer fuel rod c, and the movement is measured. By rotating the fuel rod or the round fuel assembly, the outer peripheral fuel rods adjacent to each other are inspected one after another, and such an operation is transferred in the axial direction of the fuel rods. That is, not only does it take a considerable amount of time for measurement, but also it takes time and effort to obtain a measured value from the obtained data. In addition, since it is due to the physical contact between the probe and the fuel rod, it is not possible to sufficiently satisfy the measurement accuracy, and there is a problem that it is difficult to cope with full automation.

Therefore, at present, a large caliper is used to measure the outer diameter of the round fuel assembly A, and the fuel rod c is used.
For the bend, the transit and the fuel rod c
Through gauges are used to determine the gap between them. When the transit is used, the yarn must be hung from the outer peripheral portion of the upper portion of the round fuel assembly, and the distance between the yarn and the outer peripheral fuel rod must be measured by the transit. As a result, when the inspection is performed by the means, all the operations are performed manually, and the number of man-hours is increased. Therefore, although the improvement of the measurement accuracy can be expected, the labor of the worker is increased.
Moreover, there is a defect that only about three inspections can be performed a day.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems. In the first aspect, a laser displacement meter and a TV are used instead of using a differential transformer or a caliper. By adopting a camera as a measuring device,
The outer diameter and the bending of the round fuel assembly can be measured by the laser beam emitted from the measuring device, and the gap between the fuel rods can be measured by processing the image by the TV camera. The fuel assembly is configured to be able to move up and down, and the round fuel assembly is not rotatable.
Further, by attaching an electric control unit having an arithmetic processing unit and connecting the measuring device and other driving units thereto, the time required for the acceptance inspection is drastically reduced, and the measurement accuracy is improved. The goal is to achieve full automation as well as to achieve this.

Further, according to claim 2, the above-mentioned claim 1 is provided.
In addition to the above configuration, an appearance inspection elevator is attached, so that when an external abnormality is detected by the electric control unit, it is possible for the inspector who got on the elevator to immediately inspect the abnormal location. , So that we can begin to consider prompt post-measures.

[0008]

According to a first aspect of the present invention, there is provided an electric control unit having an arithmetic processing unit, and an outer shape measuring unit connected thereto. Is an elevating guide base, a measuring table elevating drive unit operated by the electric control unit, and a measuring table that can move up and down by using the elevating guide body as a guide by operating the measuring table elevating drive unit. A fuel rotary table on which a round fuel assembly to be mounted is mounted and mounted, and a fuel rotary drive unit that is rotatably operated by the electric control unit.
On the diameter line of the round fuel assembly, a pair of outer diameter measuring laser displacement gauges provided facing the outer peripheral fuel rods, and on the diameter line of the same round fuel assembly, A fuel rod bend measurement that is horizontally mounted parallel to the tangent line of the round fuel assembly by a linear drive unit mounted on the outer peripheral side fuel rod and operated by the electric control unit. A laser displacement meter for use and a TV camera for measuring the gap between fuel rods provided on the diameter line of the round fuel assembly and directed toward the fuel rods on the outer peripheral side thereof. The measurement results of the intelligent laser displacement meter and the fuel rod bending measuring laser displacement meter are introduced into the arithmetic processing unit of the electric control unit, and the outer diameter of the round fuel assembly and the bending of the fuel rod can be measured. And
An image processing by a TV camera system including the TV camera for gap measurement detects a gap between fuel rods, and receiving the round fuel assembly for a new type of converter by external shape detection. We are going to provide inspection equipment.

Next, in the acceptance inspection apparatus of claim 2,
An electric control unit having an arithmetic processing unit, a contour detecting unit connected to the electric control unit, and a visual inspection elevator provided near the contour detecting unit are provided, and the contour detecting unit is provided upright. Elevating guide base, measuring table elevating drive unit operated by the electric control unit, and operation of the measuring table elevating drive unit,
A measuring table that can move up and down by using the elevating guide base and a fuel turntable on which a round fuel assembly to be inspected is placed and erected are rotatably driven by the electric control unit. A pair of outer diameter measuring laser displacement meters that are located on the diameter line of the round fuel assembly and are directed toward the outer peripheral fuel rods, and Is mounted on the diameter line of the fuel assembly and directed toward the fuel rod on the outer peripheral side thereof, and is parallel to the tangent line of the round fuel assembly by the linear drive unit operated by the electric control unit. And a laser displacement meter for measuring the bending of a fuel rod that can be moved horizontally and for measuring the gap between fuel rods that are located on the diameter line of the round fuel assembly and are directed toward the outer circumferential fuel rod. A TV camera is provided, and the laser displacement gauge for measuring the outer diameter and the fuel rod are provided. Ri and Hakachi results of Hakachi laser displacement meter introduced into the processing unit of the electrical control unit, with bending of the outer diameter of the fuel rods of round fuel assemblies can be Hakachi,
The gap between the fuel rods is detected by image processing using a TV camera system including the gap detection TV camera, and the appearance inspection elevator was confirmed to have an abnormal outer shape of the round fuel assembly. In this case, the vehicle is provided with an elevating and lowering part which moves up and down by the operation of the driving part, and the elevating and lowering part is a place where an inspector who gets on the part can visually inspect an abnormal part of the round fuel assembly. Up to that point, it can move up and down.

[0010]

The operation of the measuring table elevating drive unit by the electric control unit causes the measuring table to move up and down along the elevating guide base and to stop at a predetermined length, so that the round table mounted on the fuel rotary table is erected. The measuring table can be mounted at a desired position on the outer peripheral side of the fuel assembly. In this state, if the pair of outer diameter measuring laser displacement meters provided on the measuring table is operated by the electric control unit, the outer diameter measuring laser displacement meter is positioned on the diameter line of the round fuel assembly. Since it is arranged, the separation distance between the surface of the pair of outer peripheral fuel rods on the diameter line and each outer diameter measuring laser is input to the arithmetic processing unit of the electric control unit, where the round fuel assembly is The outer diameter of the body will be calculated.

Further, since a laser displacement meter for measuring fuel rod bending is installed on the measuring table, it is operated by an electric control unit, and the linear displacement driving unit drives the laser displacement meter for measuring fuel rod bending. When the gauge is moved horizontally along the tangent line of the round fuel assembly, the outer peripheral fuel rods facing the outer peripheral fuel rods are displaced in the moving direction, and the outer peripheral fuel rods and the fuel rod bending measurement laser displacement are displaced. The distance from the gauge changes, and at this time, the point where the distance becomes the minimum value is grasped as the point where the bending of the fuel rod is the largest. The above-described measurement result is also input to the arithmetic processing unit of the electric control unit, and here, it is calculated in which direction and how long the fuel rod bends.

Further, a TV camera for measuring the gap between the fuel rods is provided on the measuring table. The TV camera is operated by the electric control unit, and the fuel rotation drive unit is also operated to obtain the image of the gap. The gap between the fuel rods can be measured by processing the image with a TV camera system including the TV camera.

When the measurement and inspection are completed in this way, the measurement and inspection are repeated sequentially while rotating the round fuel assembly by a desired rotation angle by operating the fuel rotation drive unit. The platform is moved up and down by a desired length in a desired direction, and again, the above-described measurement inspection is performed, and the necessary inspection is performed over the entire length of the round fuel assembly.

Next, according to the present invention, the elevator for visual inspection is provided on the lift guide base, and therefore, if an inspector detects an abnormality based on the inspection result measured by the electric control unit, Immediately, the user goes up to the abnormal location by the appearance inspection elevator, and can directly visually observe the abnormal state.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. 1 to 3. In the first embodiment, an electric control unit 1 having an arithmetic processing unit 1a is connected to the electric control unit 1 as described later. And a contour inspection elevator 3 provided in the vicinity of the contour measuring unit 2 is provided.

The above-described outer shape measuring unit 2 includes a lifting guide base 2a erected at a predetermined location, a measuring table lifting driving unit 2b whose operation is controlled by the electric control unit 1, and
A measuring table 2c is provided which can move up and down by using the elevating guide base 2a as a guide. Here, the lift guide base 2a
As shown in FIGS. 1A and 1B, the open end 2d is opened as a flat U-shape, and the measuring table 2
c is also formed in a smaller U-shape, and its opening 2e is housed in the same direction as the open end 2d.

Further, the measuring table 2c in the illustrated example is held in a horizontal state, and as shown in FIG. A vertically mounted screw 2g which is rotated by the above-mentioned measuring table elevating drive unit 2b shown in FIG. 2A is screwed through the measuring table elevating drive unit 2b. The measuring table 2c is screwed up and down freely.

Further, the one shown as the measuring table 2c is provided with running rollers 2h on both side portions thereof, so that the measuring table 2c can smoothly move up and down with respect to the elevating guide base 2a. In the figure, reference numeral 2i denotes a storage space formed in the measurement table 2c and opened in the opening 2e.

Immediately below the accommodation space 2i, a fuel rotation drive unit 2j operated by the electric control unit 1 is provided.
The round fuel assembly A can be placed upright on the rotatable fuel turntable 2k. Therefore, the round fuel assembly A can of course be accommodated in the measuring table 2c. 2i.

In the present invention, a measuring instrument for the following inspection is provided in the above-mentioned measuring table 2c which can be moved up and down. One for measuring the outer diameter of the assembly A, the other for measuring the bending of the fuel rod in what direction and how much, and further, between the fuel rods. This is for measuring the length of the gap.

By the way, the present invention does not use mechanical means such as abutment as in the prior art as the above-mentioned measuring instrument.
In each case, a pair of laser displacement gauges 4A for measuring the outer diameter, a laser displacement gauge 4B for measuring the bending of the fuel rod, and a TV camera 4C for measuring the gap between the fuel rods are operated by the electric control unit 1. Are installed on the above-mentioned measuring table 2c, and the installation configuration is as follows.

First, the outer diameter measuring laser displacement meter 4A
In detail, as shown in FIG. 1 and FIG. 2, the fuel rods C ₁ , C on the diameter line of the round fuel assembly A mounted on the fuel turntable 2k and on the outer peripheral side thereof are shown.
_The laser beam emitted from the outer diameter measuring laser displacement meter 4A reflects the laser beam, so that the distance between the outer peripheral fuel rods C ₁ and C ₁ facing the laser beam is reduced. This is input to the arithmetic processing unit 1a of the electric control unit 1, and the outside diameter of the round fuel assembly A is calculated by the operation.

Next, the laser displacement meter 4B for measuring fuel rod bending will be described. In the illustrated example, the laser displacement meter 4A for measuring outer diameter is used as one laser displacement meter 4B for measuring fuel rod bending. 90 ° from now on
It is also provided at a position separated only by the vertical screw 2g. Here, the fuel displacement measuring laser displacement meter 4B is not simply fixed to the measuring table 2c, but is driven by the linear drive unit 5 which can be operated by the electric control unit 1 to form the round fuel assembly A. It is installed so that it can move horizontally in parallel with the tangential direction.

[0024] Therefore, the fuel rods bending Hakachi laser displacement meter. 4B, the linear drive unit 5, the direction of the arrow X shown in FIG. 1 (B), substantially the diameter of the outer peripheral side fuel rods C ₁ while moving only the extent, will be fired a laser beam, thereby, as shown in ibid diagram of the vector the outer peripheral side fuel rods C ₁ is, towards any direction, how much bending occurs The value V can be measured, and this is calculated in the arithmetic processing unit 1a of the electric control unit 1. That is, in the movement of the, and laser displacement meter 4B fuel rods bending Hakachi is of obtaining the value where the distance between the surface is minimized at the outer peripheral side fuel rods C _1, to store that became the minimum value if the can at that time displacement of the outer peripheral side fuel rods C ₁ (bend) is grasped as the largest value.

Further, T for measuring the gap between the fuel rods described above.
As shown in FIGS. 1A and 3, the V camera 4C is located on the diameter line of the same round fuel assembly A in the illustrated example, and is opposed to the upper surface side of the measuring table 2c. The gap between the outer fuel rods C ₁ and C ₁ is imaged by appropriately operating the fuel rotation drive unit 2j by the electric control unit 1, and the image is measured. The image can be processed and measured by a TV camera system (not shown) including the TV camera 4C for use. In the acceptance inspection by the above-described measurement, of course, the height of the measuring table 2c is sequentially adjusted by the operation of the electric control unit 1 of the measuring table raising / lowering drive unit 2b. The length of the side fuel rods C ₁ and C ₁ is measured in the longitudinal direction.

According to the present invention, the appearance inspection elevator 3 is erected in the vicinity of the outer shape measuring unit 2 as described above. This includes a driving unit 3a and a transmission unit 3a.
and a lifting and lowering section 3d that allows the raising and lowering column 3c to freely move up and down via the b. When an abnormality is detected in the inspection result by the electric control section 1 as described above, the inspector immediately When the user gets into the elevator boarding section 3d and rises to the desired height, the abnormal location can be visually inspected.

[0027]

Since the present invention is constructed as described above, the first aspect of the present invention relates to a vertical movement by an electric control unit of a measuring table, a laser displacement gauge for measuring an outer diameter, and a bending measurement of a fuel rod. By utilizing the laser displacement gauge for use and the TV camera for measuring the gap between the fuel rods, it is possible to carry out quick and high-precision measurement inspection without touching the outer fuel rods. This can simplify data management. That is, the measurement data obtained by the inspection can be managed and printed out by a floppy disk, so that it can be compared with the measurement data by the reused fuel inspection device. Also,
An automatic operation can be performed by setting a program for the operation of the electric control unit by a control panel.

According to the second aspect of the present invention, by installing the vicinity of the appearance inspection elevator, not only can the measurement result be known, but also, if necessary, the abnormal portion of the round fuel assembly can be visually observed and dealt with. It is also possible to do.

[Brief description of the drawings]

FIG. 1 shows an acceptance inspection device according to the present invention, in which (A) is a schematic front view, and (B) is a schematic plan view in a fuel rod bending measurement state.

FIG. 2 is a schematic plan view of the round fuel assembly of the acceptance inspection device in an outer shape detection state.

FIG. 3 is a schematic plan view showing a state of measuring a gap between fuel rods in the acceptance inspection device of the same.

FIG. 4 is a perspective view in which a part of a round fuel assembly is cut away.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Electric control part 1a Arithmetic processing part 2 Outer shape measuring part 2a Elevating guide base 2b Measuring table elevating drive part 2c Measuring table 2k Fuel turntable 2j Fuel rotation drive part 3 Visual inspection elevator 3a Drive part 3d Elevating part 4A Outside Laser displacement gauge for diameter measurement 4B Laser displacement gauge for fuel rod bending measurement 4C TV camera for gap measurement between fuel rods 5 Linear drive section A Round fuel assembly C ₁ Outer side fuel rod

Claims (2)

(57) [Claims] An electric control unit having an arithmetic processing unit, and an external shape measuring unit connected to the electric control unit, wherein the external shape measuring unit is operated by the elevating guide base and the electric control unit. A measuring table lift drive unit, a measurement table movable up and down by using the lift guide base as a guide, and a fuel on which a round fuel assembly to be inspected is mounted A rotary table, comprising a fuel rotation drive unit that is rotatably operated by the electric control unit, and the measurement table is located on the diameter line of the round fuel assembly and is directed toward the outer peripheral side fuel rod. And a pair of outer diameter measuring laser displacement gauges installed on the diameter fuel line of the same round fuel assembly, mounted on the outer peripheral side fuel rods, and provided by the electric control unit. Parallel to the tangent line of the round fuel assembly by the activated linear drive And a laser displacement gauge for measuring the bending of a fuel rod that can be moved horizontally, and a gap between the fuel rods disposed on the diameter line of the round fuel assembly and directed toward the outer peripheral fuel rod. A TV camera is provided, and the measurement results of the laser displacement meter for measuring the outer diameter and the laser displacement meter for measuring the bending of the fuel rod are introduced into an arithmetic processing unit of the electric control unit. And the bend of the fuel rods can be measured, and the gap between the fuel rods is detected by image processing using a TV camera system including the gap measuring TV camera. Inspection equipment by measuring the outer shape of the new round fuel assembly for the converter. 2. An electric control unit having an arithmetic processing unit, an outer shape detecting unit connected to the electric control unit, and an appearance inspection elevator provided near the outer shape measuring unit. The section is an up-and-down elevating guide base, a measuring table elevating drive section operated by the electric control section, and a measuring table that can move up and down using the elevating guide base as a guide by operation of the measuring table elevating drive section. A fuel rotary table on which a round fuel assembly to be inspected is mounted and mounted, and a fuel rotary drive unit rotatably operated by the electric control unit; A pair of outer diameter measuring laser displacement meters provided on the diameter line of the assembly and facing the outer peripheral fuel rods; and It is mounted facing the rod, and by the electric control unit The laser displacement meter for measuring the bending of the fuel rod which can be moved horizontally in parallel with the tangent line of the round fuel assembly by the linear drive unit to be operated, and the outer circumference of the round fuel assembly on the diameter line of the fuel assembly A TV camera for measuring the gap between the fuel rods provided facing the side fuel rod is provided, and the measurement results of the laser displacement meter for measuring the outer diameter and the laser displacement meter for measuring the fuel rod bending are provided. Introduced to the arithmetic processing unit of the electric control unit, the outer diameter of the round fuel assembly and the bending of the fuel rod can be measured, and the TV including the TV camera for gap measurement described above.
The gap between the fuel rods is detected by image processing by the camera system, and the above-mentioned appearance inspection elevator is raised by the operation of the drive unit when the external shape abnormality of the round fuel assembly is confirmed. The climbing and descending section is characterized by being movable up and down to a point where an inspector who has entered the section can visually inspect an abnormal place of the round fuel assembly. Acceptance inspection device by measuring the outer shape of the round fuel assembly for the new conversion furnace.