Standard for mobile equipment for measuring structural deformation of nuclear fuel assembly

Abstract

Provided is a standard for mobile equipment for measuring structural deformation of a nuclear fuel assembly, the standard including: a fixed frame fixed to one side of measuring equipment accommodated in a container; a standard member configured to be attached to and detached from the fixed frame, to rotate with one end portion of the fixed frame as a center, and to correspond to a nuclear fuel assembly standard specification, wherein an upper plate provided with a coupling means configured to be coupled with a transport device is coupled on one end portion of the standard member, a lower plate configured to be erected upright on and fixed to one side of the measuring equipment is coupled on an opposite end portion of the standard member.

Claims

1. A standard device for a mobile equipment including a scanner for measuring structural deformation of a nuclear fuel assembly, the standard device comprising: a fixing frame for holding a standard member; the fixing frame configured to be fixed to one side of the mobile equipment accommodated in a container; the standard member configured to be detachably held in the fixing frame, to rotate around one end portion of the fixing frame, and to correspond to a nuclear fuel assembly standard specification; an upper plate attached to one end portion of the standard member, the upper plate including a coupling means for coupling with a transport device; and a lower plate attached to an opposite end portion of the standard member, the lower plate configured to facilitate the standard member to be stably erected upright on and fixed to one side of the mobile equipment, wherein the standard member is a standard specification member for calibrating the scanner for measuring the nuclear fuel assembly to accurately measure the structural deformation of the nuclear fuel assembly.

2. The standard device of claim 1, wherein the fixing frame includes: a protective cover provided with an accommodating groove configured to accommodate the standard member and with a fastening means configured to prevent the standard member accommodated in the accommodating groove from being removed; a lower support provided below the protective cover and fixed to the container; and an upper support installed between the protective cover and the lower support and configured to fix the protective cover to the lower support.

3. The standard device of claim 2, wherein a plurality of buffer members are further provided between both side parts of the upper support and the lower support, in a longitudinal direction of the lower support.

4. The standard device of claim 3, wherein through holes are provided on both side portions of one end portion of the protective cover; a shaft hole corresponding to the through holes is provided on the one end portion of the standard member; and a rotating pin through the through holes and the shaft hole provided to allow the standard member to rotate around the one end portion of the protective covers.

5. The standard device of claim 2, wherein through holes are provided on both side portions of one end portion of the protective cover; a shaft hole corresponding to the through holes is provided on the one end portion of the standard member; and a rotating pin through the through holes and the shaft hole provided to allow the standard member to rotate around the one end portion of the protective covers.

Description

DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a view showing a nuclear fuel assembly and a nuclear fuel rod, each as a single unit.

(2) FIG. 2 is an exploded perspective view showing a standard for mobile equipment for measuring structural deformation of a nuclear fuel assembly according to an exemplary embodiment of the present invention.

(3) FIG. 3 is a perspective view showing the standard for the mobile equipment for measuring structural deformation of the nuclear fuel assembly according to the exemplary embodiment of the present invention.

(4) FIG. 4 is a front view showing the standard for the mobile equipment for measuring structural deformation of the nuclear fuel assembly according to the exemplary embodiment of the present invention.

(5) FIG. 5 is a perspective view of main parts showing a state where the standard for the mobile equipment for measuring structural deformation of the nuclear fuel assembly according to the exemplary embodiment of the present invention is installed on one side of the measuring equipment inside a container.

(6) FIG. 6 is a perspective view showing a state where calibration work of the scanner is performed by using the standard for the mobile equipment for measuring structural deformation of the nuclear fuel assembly according to the exemplary embodiment of the present invention.

BEST MODE

(7) Terms or words used in the present specification and claims are not to be construed as limiting to usual or dictionary meanings thereof. On the basis of a principle that the inventors may properly define the concept of terms in order to best explain the invention thereof in the best way possible, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

(8) Hereinafter, a standard for mobile equipment for measuring structural deformation of a nuclear fuel assembly (hereinafter referred to as “standard”) according to an exemplary embodiment of the present invention will be described with reference to the accompanying FIGS. 2 to 6.

(9) The standard has a technical feature provided for scanner calibration for the mobile equipment for measuring the nuclear fuel assembly.

(10) That is, by providing a standard member corresponding to a nuclear fuel assembly standard specification, and by allowing the scanner to be calibrated through the standard member, accuracy of measuring the nuclear fuel assembly through the scanner may be enhanced.

(11) As shown in FIG. 2, the standard includes a fixed frame 100 and a standard member 200.

(12) The fixed frame 100 is configured to fix the standard member 200, and is installed inside the container protecting the measurement equipment. The “fixed frame” is also referred to herein as a “fixing frame”.

(13) The fixed frame 100 includes a protective cover 110, a lower support 120, and an upper support 130.

(14) The protective cover 110 protects the standard member 200 and is a portion to and from which the standard member 200 is attached and detached.

(15) The protective cover 110 is provided with an accommodating groove 111 to accommodate the standard member 200, wherein the accommodating groove 111 corresponds to a shape of the standard member 200.

(16) As the standard member 200 is provided in a quadrangular shape, the accommodating groove 111 also has a quadrangular shape corresponding thereto, wherein a top portion of the accommodating groove 111 is open, whereby the standard member 200 may enter or exit the accommodating groove 111 therethrough.

(17) The protective cover 110 configured as described above is provided in a “U” shape consisting of a bottom surface 112 and opposite side parts 113, wherein the opposite side portions 113 of the protective cover 110 may be each provided with through holes 113a so as to reduce production cost and weight.

(18) In addition, both side portions of one end of the protective cover 110 may be each composed of extension portions 114 provided to extend to the outside.

(19) That is, only the opposite side parts 113 except the bottom surface 112 are configured to be provided to extend.

(20) At this time, the extension parts 114 are provided with a through hole 114a penetrating both sides.

(21) The through hole 114a is configured to allow a rotating pin P to be passed so that the standard member 200 is axially coupled thereto.

(22) As such, the standard member 200 may be axially coupled to the extension portions 114 having no bottom surface 112 and thus may not interfere with the bottom surface 112 when rotating. Accordingly, rotation of the standard member 200 may be smoothly performed.

(23) In addition, a fastening means 115 is installed at an opened portion of the protective cover 110.

(24) The fastening means 115 is configured to prevent the standard member 200 positioned in the accommodating groove 111 from being removed from the open portion.

(25) That is, when transporting the measuring equipment, the standard member 200 is transported in a state of being laid in the accommodating groove 111 as shown in FIG. 3. At this time, because the fastening means 115 is blocking the opened portion of the protective cover 110, the standard member 200 may be prevented in advance from being removed or moved upward.

(26) In a longitudinal direction of the standard member 200, the rotating pin P is coupled to the protective cover 110, so that escape of the standard member 200 from the protective cover 110 does not occur.

(27) The plurality of the fastening means 115 may be provided in the longitudinal direction of the protective cover 110, but not limited to a specific configuration.

(28) As shown in FIGS. 2 and 3, one end of the fastening means 115 may be hinged to one side of the protective cover 110, and an opposite end of the fastening means 115 may be configured to fold upwardly or to fasten to an opposite side of the protective cover 110, with the one end of the fastening means 115 as the center.

(29) In addition, the lower support 120 is a configured to fix the protective cover 110 to the inside of the container of the measuring equipment and is located under the protective cover 110.

(30) The lower supporter 120 is fixed to the inside of the container and, the same as the protective cover 110, may be in the “U” shape consisting of a bottom surface 121 and opposite side parts 122.

(31) In addition, the through holes 122a may also be provided at the opposite side parts of the lower support 120.

(32) In addition, the upper support 130 serves to support the protective cover 110 to the lower support 120 and is fixed between the protective cover 110 and the lower support 120.

(33) At this time, the upper support 130 fixing means is not limited to a specific one and may be provided by a fixing means such as bolts and the like.

(34) At this time, the upper support 130 may include a top plate 131 corresponding to the bottom surface of the protective cover 110 and opposite side parts 132 bent downward from both sides of the top plate 131.

(35) At this time, width of the upper support 130 is provided smaller than width of the lower support 120, the opposite side parts 132 of the upper support 130 are located in the space between the opposite side parts 122 of the lower support 120.

(36) On the other hand, buffer members 140 may be further provided on both side parts 132 of the upper support 130, respectively.

(37) This is to attenuate that vibration of the lower support 120 fixed to the container is transferred to the protective cover 110 in which the standard member 200 is installed.

(38) That is, since the lower support 120 is located between the container and the standard member 200, as shown in FIG. 5, the vibration may be transferred from the container to the standard member 200 when transporting the container. At this time, the buffer member 140 interposed between the lower support 120 and the upper support 130 may attenuate the vibration, thereby preventing the standard member 200 from being damaged.

(39) Next, the standard member 200 is a standard specification member for calibrating a scanner for measuring the nuclear fuel assembly.

(40) Standard member 200 is provided in a straight line and may be made of stone.

(41) This is to prevent the standard member 200 from being deformed even after a long period of time.

(42) The standard member 200 is made in a form corresponding to the accommodating groove 111 of the protective cover 110, and the length of the standard member 200 is provided to be longer than length of the protective cover 110 as shown in FIG. 3.

(43) This is to ensure that the rotation of the standard member 200 is smoothly accomplished on the protective cover 110.

(44) To this end, a shaft hole 210 is provided on both sides of one end of the standard member 200.

(45) Here, the shaft hole 210 is provided in a shape corresponding to the through hole 114a of the protective cover 110.

(46) On the other hand, the rotating pin P is provided to provide a rotating reference of the standard member 200 by passing through the through hole 114a of the protective cover 110 and the shaft hole 210 of the standard member 200.

(47) That is, in order to move the standard member 200 from the protective cover 110, the standard member 200 is to be erected upright. To this end, the rotating pin P is configured to become a shaft when the standard member 200 is erected.

(48) In addition, an upper plate 220 and a lower plate 230 are installed at both end portions of the standard member 200, respectively.

(49) The upper plate 220 is a portion to which the transport means provided for erecting the standard member 200 is coupled in the process of erecting the standard member 200 with the rotating pin P as the center.

(50) To this end, the upper plate 220 provides a coupling means 221 for coupling with the transport means.

(51) The coupling means 221 is provided on the upper plate 220 and is good enough, provided the transport means such as a crane and the like is allowed to be hooked and coupled therewith.

(52) The coupling means 221 may be provided in a ring shape, as shown in FIGS. 2 to 4, may be provided in a plurality of through holes.

(53) In addition, the lower plate 230 is configured to stably erect the standard member 200 and is detachably attached to one end of the standard member 200.

(54) The standard member 200 is configured to perform the calibration work of the scanner. To this end, the standard member 200 should be erected upright by being adjacent to one side of the column as shown in FIG. 6. Since the lower plate 230 may be fixed to a floor adjacent to the one side of the column, the standard member 200 may be stably erected upright.

(55) To this end, the lower plate 230 includes an insertion protrusion 231, and an insertion means for inserting the insertion protrusion 231 may be provided on the floor adjacent to the one side of the column.

(56) Hereinafter, the use of the standard configured as described above will be examined.

(57) The measuring equipment stored in the container is transported to a measurement site.

(58) In this case, the container may be transported by land, sea, or air.

(59) Meanwhile, the container transported to the measurement site is removed of the cover thereof for measuring the nuclear fuel assembly, whereby the measuring equipment provided on a base is exposed to the outside.

(60) Next, as shown in FIG. 6, supports are rotated to and positioned at the outside of a boundary of the base, whereby the base is fixed to the ground without moving.

(61) Next, as shown in FIG. 6, the column is erected upright by operating a hydraulic cylinder.

(62) Next, in order to enhance the accuracy of measured values of the nuclear fuel assembly through the scanner, the calibration work of the scanner is performed.

(63) To this end, the standard member provided on one side of the base is fixed to the transport means.

(64) At this time, although not shown, a crane may be provided as the transport means.

(65) Meanwhile, in order to connect the crane to the standard member 200, a transport hanger 300 may be provided as a connection medium between the crane and the standard member 200.

(66) That is, after coupling the transport hanger 300 to the upper plate 220 of the standard member 200, the crane is to lift the transport hanger 300.

(67) When the coupling of the transport hanger 300 to the coupling means 221 of the upper plate 220 is completed, the fastening means 115 is released to open the opened portion of the protective cover 110.

(68) Next, when the transport hanger 300 is lifted by using a crane, the standard member 200 is rotated upward with the rotation pin P as the center.

(69) Subsequently, the standard member 200 is erected upright while being rotated between the extension portions 114.

(70) Next, the rotating pin P is separated from the through hole 114a of the protective cover 110 and the shaft hole 210 of the standard member 200.

(71) Accordingly, the standard member 200 becomes to be in a state free to move on the protective cover 110.

(72) Next, the standard member 200 is fixed to the floor adjacent to the one side of the column by operating the crane.

(73) At this time, the insertion protrusion 231 provided on the lower plate 230 of the standard member 200 is coupled to the floor adjacent to the one side of the column, whereby the standard member 200 becomes to be in a state erected upright adjacent to the one side of the column as shown in

(74) FIG. 6.

(75) Next, the calibration work of the scanner is performed through measuring the standard member 200 by operating the scanner.

(76) That is, the calibration work is performed through the standard member 200 with respect to standard values such as length, envelope, slope, and the like of the nuclear fuel assembly input to the scanner.

(77) Next, when the calibration work of the scanner has been completed, the standard member 200 is laid and seated on the accommodating groove 111 of protective cover 110 by performing the above-described series of procedures in reverse order.

(78) Then, by fastening the fastening means 115, the calibration work of the scanner using the standard member 200 is completed.

(79) As described above, the standard of the mobile equipment for measuring structural deformation of the nuclear fuel assembly according to the present invention has a technical feature that allows the calibration work of the scanner to be performed in the mobile equipment for measuring structural deformation of the nuclear fuel assembly.

(80) That is, after the calibration work of the scanner is performed through the same standard member as the nuclear fuel assembly standard specification, it is possible to measure whether or not the nuclear fuel assembly structure is deformed, thereby increasing the accuracy of measuring the nuclear fuel assembly.

(81) Therefore, the nuclear fuel assembly may be stably introduced into the nuclear reactor.

(82) Although the present invention has been described in detail with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and variations are within the scope of the appended claims.

DESCRIPTION OF THE REFERENCE NUMERALS IN THE DRAWINGS

(83) TABLE-US-00001 100: fixed frame 110: protective cover 111: accommodating groove 112, 121: bottom surface 113, 122, 132: side portion 113a, 122a: through hole 114: extension portion 114a: through hole 115: fastening means 120: lower support 130: upper support 131: top plate 140: buffer member 200: standard 210: shaft hole 220: upper plate 221: coupling means 230: lower plate 231: insertion protrusion 300: transport hanger