KR101104647B1 - SUPPORT GRID for NUCLEAR FUEL ASSEMBLY - Google Patents

SUPPORT GRID for NUCLEAR FUEL ASSEMBLY Download PDF

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KR101104647B1
KR101104647B1 KR1020090111075A KR20090111075A KR101104647B1 KR 101104647 B1 KR101104647 B1 KR 101104647B1 KR 1020090111075 A KR1020090111075 A KR 1020090111075A KR 20090111075 A KR20090111075 A KR 20090111075A KR 101104647 B1 KR101104647 B1 KR 101104647B1
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South Korea
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support grid
pressure plate
plate
pressing plate
fuel assembly
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KR1020090111075A
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Korean (ko)
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KR20110054441A (en
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정해균
박상철
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한전원자력연료 주식회사
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
    • G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
    • G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
    • G21C3/33—Supporting or hanging of elements in the bundle; Means forming part of the bundle for inserting it into, or removing it from, the core; Means for coupling adjacent bundles
    • G21C3/332—Supports for spacer grids
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
    • G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
    • G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
    • G21C3/34—Spacer grids
    • G21C3/352—Spacer grids formed of assembled intersecting strips
    • 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

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

본 발명은 핵연료 집합체의 지지격자 변형 복구장치에 관한 것으로, 핵연료 집합체의 지지격자 중 내부격자판을 사이에 두고 그 양측에 각각 배치되는 상부가압판 및 하부가압판; 상기 상부가압판과 하부가압판을 가압하여 상부가압판과 하부가압판 사이에 개재된 내부격자판의 변형을 복구하는 조임구를 포함한다.The present invention relates to a support grid deformation recovery apparatus of a nuclear fuel assembly, comprising: an upper pressure plate and a lower pressure plate respectively disposed on both sides of the support grid of the fuel assembly with an inner lattice interposed therebetween; It includes a fastener for pressing the upper pressure plate and the lower pressure plate to restore the deformation of the internal lattice plate interposed between the upper pressure plate and the lower pressure plate.

이와 같이 구성된 본 발명에 의하면, 열 변형이나 기타 외부의 요인 등에 의해 지지격자가 변형될 경우 지지격자의 변형된 부분을 사이에 두고 상부가압판과 하부가압판을 밀착시키고, 조임스크류를 이용하여 상부가압판과 하부가압판을 상호 가압함으로써 지지격자의 변형된 부분이 편평해진다. 이에 따라 기존에 일일이 작업자가 망치 또는 플라이어 등을 이용하여 지지격자의 변형된 부분을 보수하는 것에 비해 복구 정밀도 및 작업 능률을 현저히 향상시킬 수 있게 된다.According to the present invention configured as described above, when the support grid is deformed due to thermal deformation or other external factors, the upper pressure plate and the lower pressure plate are brought into close contact with the deformed portion of the support grid therebetween, The deformed portion of the support grid is flattened by mutually pressing the lower pressing plate. Accordingly, it is possible to remarkably improve the repair accuracy and work efficiency compared to conventionally repairing the deformed portion of the support grid by using a hammer or a plier.

핵연료 집합체, 지지격자 Nuclear Fuel Assembly, Support Grid

Description

핵연료 집합체의 지지격자 변형 복구장치{SUPPORT GRID for NUCLEAR FUEL ASSEMBLY}SUPPORT GRID FOR NUCLEAR FUEL ASSEMBLY}

본 발명은 핵연료 집합체의 지지격자 중 내부격자판이 외부의 충격 등에 의해 밴딩된 것을 쉽게 펼 수 있도록 한 핵연료 집합체의 지지격자 변형 복구장치에 관한 것이다.The present invention relates to a support grid deformation recovery apparatus of a fuel assembly that allows the inner lattice plate of the support grid of the nuclear fuel assembly to be unfolded easily by an external impact or the like.

일반적으로 지지격자는 스프링 및 딤플이 각인된 격자판을 가로, 세로로 배열 및 엮어서 교차 부위를 용접하여 핵연료봉을 지지 및 고정하기 위한 것이다.In general, the support grid is to support and fix the nuclear fuel rod by welding the cross section by arranging and weaving the lattice in which the spring and the dimple are imprinted horizontally and vertically.

현재 상용 공급되고 있는 지지격자는 기본적으로 내부격자판, 외부격자판이 가로, 세로로 배열 및 엮어진 격자판의 교차점을 레이저로 스폿 용접(Spot Welding)하여 접합시켜 사용하고 있으며, 교차점에서의 용접 및 용접 품질이 지지격자의 구조적 성능에 큰 영향을 미치고 있다.The support grid currently supplied commercially is used by spot welding of the intersections of the lattice plate where the inner lattice and outer lattice are arranged horizontally and vertically and woven by laser spot welding. This has a great influence on the structural performance of the support grid.

이러한 지지격자는 교차점의 용접 품질 및 방법을 개선하여 구조적인 성능을 향상시킬 수 있으며, 이로 인해 핵연료의 특성을 크게 향상시킬 수 있다.These support gratings can improve structural performance by improving the weld quality and method of intersection, thereby significantly improving the characteristics of the fuel.

현재 국내의 연료 생산업체에서 지지격자 제조 시 외부격자판에 레이저를 이용하여 시임 용접(Seem Welding)을 실시하고, 내부격자판 교차점에 스폿 용접(Spot Welding)을 실시한다.At present, domestic fuel producers carry out Seem Welding using laser on the external grid when manufacturing support grid and spot welding on the intersection of internal grid.

이때, 외부의 충격이나 스폿 용접시 레이저에서 발생하는 고열로 인해 지지격자의 치수 변경 및 열 변형이 발생할 수 있으며, 이로 인해 추가적인 보수 작업이 수행되는 것이 요구된다.At this time, due to the high heat generated by the laser during external impact or spot welding, the dimension change of the support grid and thermal deformation may occur, which is required to perform additional maintenance work.

이와 같이 변형된 지지격자를 보수하기 위해, 기존에는 작업자가 망치 또는 플라이어 등의 공구를 이용하여 일일이 수작업으로 변형을 복구하였으나, 이러한 경우 보수 정밀도가 떨어지는 것은 물론 시간이 많이 소요되기 때문에 다량의 처리시에는 능률 저하를 유발하는 문제가 있었다.In order to repair the deformed support grid as described above, in the past, the worker manually repairs the deformation by using a tool such as a hammer or a plier, but in this case, the repair precision is not only low but also takes a long time. There was a problem that causes a decrease in efficiency.

본 발명은 이러한 문제점을 해결하기 위한 것으로, 본 발명의 과제는 열 변형이나 기타 외부의 요인 등에 의해 지지격자가 변형될 경우 작업자가 손쉽게 변형된 지지격자를 복구할 수 있도록 한 핵연료 집합체의 지지격자 변형 복구장치를 제공하는 것이다.The present invention is to solve this problem, the problem of the present invention is that the deformation of the support grid of the fuel assembly that allows the operator to easily repair the deformed support grid when the support grid is deformed due to thermal deformation or other external factors. It is to provide a recovery device.

상술한 과제를 해결하기 위하여, 핵연료 집합체의 지지격자 중 내부격자판을 사이에 두고 그 양측에 각각 배치되는 상부가압판 및 하부가압판; 상기 상부가압판과 하부가압판을 가압하여 상부가압판과 하부가압판 사이에 개재된 내부격자판의 변형을 복구하는 조임구를 포함하는 핵연료 집합체의 지지격자 변형 복구장치가 제공된다.In order to solve the above problems, the upper pressing plate and the lower pressing plate, respectively disposed on both sides of the support grid of the nuclear fuel assembly with the inner grid plate therebetween; There is provided a support grid strain recovery apparatus for a nuclear fuel assembly including a fastener for pressing the upper pressure plate and the lower pressure plate to recover the deformation of the inner lattice plate interposed between the upper pressure plate and the lower pressure plate.

바람직하게는, 조임구는 상기 상부가압판과 하부가압판의 양측에 서로 마주보게 배치되는 한 쌍의 클램프와, 상기 각 클램프의 상ㆍ하측에 삽입되어 각 복구판을 가압하는 조임스크류로 구성된다.Preferably, the fastener comprises a pair of clamps disposed opposite to each other on both sides of the upper pressing plate and the lower pressing plate, and a tightening screw inserted into the upper and lower sides of the clamps to press each of the recovery plates.

또한, 각각의 클램프는 상부가압판의 상면에 위치하는 상부고정부, 하부가압판의 하면에 위치하는 하부고정부, 상기 상부고정부와 하부고정부를 상호 연결하는 연결부가 "ㄷ"자 형상으로 이루어진다.In addition, each clamp has an upper fixing part located on an upper surface of the upper pressing plate, a lower fixing part located on a lower surface of the lower pressing plate, and a connection part connecting the upper fixing part and the lower fixing part to each other to have a "c" shape.

이와 같이 구성된 본 발명에 의하면, 열 변형이나 기타 외부의 요인 등에 의해 지지격자가 변형될 경우 지지격자의 변형된 부분을 사이에 두고 상부가압판과 하부가압판을 밀착시키고, 조임스크류를 이용하여 상부가압판과 하부가압판을 상호 가압함으로써 지지격자의 변형된 부분이 편평해진다. 이에 따라 기존에 일일이 작업자가 망치 또는 플라이어 등을 이용하여 지지격자의 변형된 부분을 보수하는 것에 비해 복구 정밀도 및 작업 능률을 현저히 향상시킬 수 있게 된다.According to the present invention configured as described above, when the support grid is deformed due to thermal deformation or other external factors, the upper pressure plate and the lower pressure plate are brought into close contact with the deformed portion of the support grid therebetween, The deformed portion of the support grid is flattened by mutually pressing the lower pressing plate. Accordingly, it is possible to remarkably improve the repair accuracy and work efficiency compared to conventionally repairing the deformed portion of the support grid by using a hammer or a plier.

이하에서는, 본 발명에 의한 핵연료 집합체의 지지격자 변형 복구장치의 바람직한 실시예를 첨부 도면을 참고하여 설명한다.Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the support grid deformation recovery apparatus of the nuclear fuel assembly according to the present invention.

도 1 및 도 2에 도시된 바와 같이, 본 실시예의 지지격자 변형 복구장치는 지지격자 중 특히 내부격자판에 발생한 변형 상태를 복구하기 위한 것이다.As shown in Fig. 1 and Fig. 2, the support grid deformation recovery apparatus of the present embodiment is for recovering the deformation state of the support grid, in particular in the inner grid.

이에 따르면, 본 실시예의 변형 복구장치는 상부가압판(100)과 하부가압판(200) 및 조임구(300)를 포함한다.According to this, the deformation recovery apparatus of the present embodiment includes an upper pressurizing plate 100, a lower pressurizing plate 200, and a fastener 300.

상부가압판(100)과 하부가압판(200)은 열 변형이나 기타 외부 요인에 의해 밴딩된 지지격자를 편평하게 복구하기 위한 것으로, 각각은 충분한 강성을 지닌 단면상 장방형으로 이루어지며, 지지격자 특히 내부격자판의 길이보다 길게 형성된다. 즉, 상부가압판(100)과 하부가압판(200)은 지지격자의 내부를 관통하여 그 양단이 내부격자판보다 소정량 돌출되도록 형성된다. 이러한 상부가압판(100)과 하부 가압판(200)은 내부격자판 또는 외부격자판의 양측에 각각 밀착 배치된다.The upper pressing plate 100 and the lower pressing plate 200 are intended to flatten the support grid bent by thermal deformation or other external factors, each of which has a rectangular shape in cross section with sufficient rigidity. It is formed longer than the length. That is, the upper pressing plate 100 and the lower pressing plate 200 are formed to penetrate the interior of the support grid so that both ends thereof protrude a predetermined amount from the inner grid. The upper pressing plate 100 and the lower pressing plate 200 are disposed in close contact with both sides of the inner lattice plate or the outer lattice plate, respectively.

조임구(300)는 대략 "ㄷ"자 형상으로 이루어진 클램프(310)와, 이 클램프(310)에 결합되어 상부가압판(100)과 하부가압판(200)을 가압하는 조임스크류(320)를 포함한다.The fastener 300 includes a clamp 310 having a substantially “c” shape and a fastening screw 320 coupled to the clamp 310 to press the upper pressing plate 100 and the lower pressing plate 200. .

각 클램프(310)는 상부가압판(100)과 하부가압판(200)의 양측에 위치되어 상부가압판(100)과 하부가압판(200)의 양단이 삽입되도록 구성된다. 즉, 클램프(310)는 상부가압판(100)의 상측에 위치되는 상부고정부(311)와, 하부가압판(200)의 하측에 위치되는 하부고정부(312)와, 상부고정부(311)와 하부고정부(312)의 끝단에 서로 연결해 주는 연결부(313)로 구성된다. 이때, 각 클램프(310)의 상부고정부(311)와 하부고정부(312)에는 수직 방향으로 스크류홀(311a)(312a)이 형성된다.Each clamp 310 is located on both sides of the upper pressing plate 100 and the lower pressing plate 200 is configured so that both ends of the upper pressing plate 100 and the lower pressing plate 200 is inserted. That is, the clamp 310 is the upper fixing part 311 is located on the upper side of the upper pressing plate 100, the lower fixing part 312 is located below the lower pressing plate 200, the upper fixing part 311 and It is composed of a connecting portion 313 connecting to each other at the end of the lower fixing part (312). In this case, screw holes 311a and 312a are formed in the upper fixing portion 311 and the lower fixing portion 312 of each clamp 310 in the vertical direction.

조임스크류(320)는 상술한 스크류홀에 삽입 결합되며, 작업자의 의도된 동작에 의해 상부가압판(100)과 하부가압판(200)을 가압하여 상부가압판(100)과 하부가압판(200)을 서로 밀착시킨다. 즉, 조임스크류(320)를 일측 방향으로 회전시키면 상부가압판(100)과 하부가압판(200)을 서로 점차적으로 가압하게 되고, 타측 방향으로 회전시키면 상부가압판(100)과 하부가압판(200)의 가압상태를 해제하게 된다.Tightening screw 320 is inserted and coupled to the above-described screw hole, by pressing the upper pressure plate 100 and the lower pressure plate 200 by the intended operation of the operator close contact with the upper pressure plate 100 and the lower pressure plate 200. Let's do it. That is, when the tightening screw 320 is rotated in one direction, the upper pressing plate 100 and the lower pressing plate 200 are gradually pressed to each other, and when rotating in the other direction, the upper pressing plate 100 and the lower pressing plate 200 are pressed. Will release the state.

이때, 상부가압판(100)과 하부가압판(200)의 4면에는 조임스크류(320)가 안착될 수 있도록 안착홈(110)(210)이 형성되는 것이 바람직하다.At this time, it is preferable that the mounting grooves 110 and 210 are formed on the four surfaces of the upper pressing plate 100 and the lower pressing plate 200 so that the tightening screw 320 may be seated.

이와 같이 구성된 지지격자 변형 복구장치를 이용하여 지지격자의 변형된 부분을 복구하는 동작을 도 3 및 도 4를 참고하여 설명하면 다음과 같다.The operation of recovering the deformed portion of the support grid by using the support grid deformation recovery apparatus configured as described above will be described with reference to FIGS. 3 and 4.

우선, 변형이 발생된 지지격자를 준비한다. 변형된 부분이 내부격자판이라고 가정하면, 도 3 및 도 4와 같이 그 변형된 내부격자판의 상측과 하측에 각각 상부가압판(100)과 하부가압판(200)을 위치시키고, 상부가압판(100)과 하부가압판(200)의 양측에 클램프(310)를 체결한다.First, a support grid having been deformed is prepared. Assuming that the deformed portion is the inner lattice plate, as shown in FIGS. 3 and 4, the upper and lower pressurizing plate 100 and the lower pressing plate 200 are positioned on the upper side and the lower side of the deformed inner lattice plate, respectively, and the upper and lower pressurizing plate 100 and the lower pressurizing plate 100. The clamp 310 is fastened to both sides of the pressure plate 200.

그 후, 작업자가 클램프(310)의 상부고정부(311) 및 하부고정부(312)에 결합된 스크류홀을 일측 방향으로 회전시키면 조임스크류(320)는 점차 상부가압판(100)과 하부가압판(200)을 가압하여 상호 간을 밀착시킨다. 이와 같이 조임스크류(320)의 가압력에 의해 내부격자판의 변형된 부분은 편평해지게 되는 것이다.Thereafter, when the operator rotates the screw hole coupled to the upper fixing portion 311 and the lower fixing portion 312 of the clamp 310 in one direction, the tightening screw 320 gradually increases the upper pressing plate 100 and the lower pressing plate ( 200) is pressed against each other. As described above, the deformed portion of the inner lattice plate is flattened by the pressing force of the tightening screw 320.

도 1은 본 발명에 의한 핵연료 집합체의 지지격자 변형 복구장치를 도시한 사시도.1 is a perspective view showing a support grid deformation recovery apparatus of the nuclear fuel assembly according to the present invention.

도 2는 본 발명에 의한 핵연료 집합체의 지지격자 변형 복구장치를 도시한 분해사시도.Figure 2 is an exploded perspective view showing a support grid deformation recovery apparatus of the nuclear fuel assembly according to the present invention.

도 3은 본 발명에 의한 핵연료 집합체의 지지격자 변형 복구장치를 이용하여 복구작업을 진행하는 상태를 도시한 사시도.Figure 3 is a perspective view showing a state in which the recovery operation using the support grid strain recovery device of the nuclear fuel assembly according to the present invention.

도 4는 본 발명에 의한 핵연료 집합체의 지지격자 변형 복구장치를 이용하여 복구작업을 진행하는 상태를 도시한 단면도.Figure 4 is a cross-sectional view showing a state in which the recovery operation using the support grid strain recovery device of the nuclear fuel assembly according to the present invention.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

100 ; 상부가압판 110 ; 안착홈100; Upper pressing plate 110; Home

200 ; 하부가압판 210 ; 안착홈200; Lower pressing plate 210; Home

300 ; 조임구 310 ; 클램프300; Diaphragm 310; clamp

311 ; 상부고정부 312 ; 하부고정부311; Upper fixing section 312; Bottom

313 ; 연결부 320 ; 조임스크류313; Connector 320; Tightening Screw

Claims (4)

핵연료 집합체의 지지격자판을 사이에 두고 그 양측에 각각 배치되며, 하기의 조임스크류가 안착되는 안착홈이 형성되는 상부가압판 및 하부가압판;An upper pressurizing plate and a lower pressurizing plate disposed on both sides of the support grid plate of the nuclear fuel assembly, and having a seating groove in which the following tightening screws are seated; 상기 상부가압판과 하부가압판의 양측에 서로 마주보게 배치되는 한 쌍의 클램프와;A pair of clamps disposed on both sides of the upper pressing plate and the lower pressing plate to face each other; 상기 각 클램프의 상ㆍ하측에 삽입되어 각 가압판을 가압하여 상기 상부가압판과 하부가압판 사이에 개재된 지지격자판의 변형을 복구하게 되는 조임스크류를 포함하는 것을 특징으로 하는 핵연료 집합체의 지지격자 변형 복구장치.And a tightening screw inserted into the upper and lower sides of the clamps to press each of the pressure plates to recover deformation of the support grid interposed between the upper and lower pressure plates. . 삭제delete 제1항에 있어서,The method of claim 1, 상기 각각의 클램프는 상부가압판의 상면에 위치하는 상부고정부, 하부가압판의 하면에 위치하는 하부고정부, 상기 상부고정부와 하부고정부를 상호 연결하는 연결부가 "ㄷ"자 형상으로 이루어진 것을 특징으로 하는 핵연료 집합체의 지지격자 변형 복구장치.Each clamp has an upper fixing part located on an upper surface of the upper pressing plate, a lower fixing part located on a lower surface of the lower pressing plate, and a connection part connecting the upper fixing part and the lower fixing part to have a shape of "c". Support grid deformation recovery device of the nuclear fuel assembly. 삭제delete
KR1020090111075A 2009-11-17 2009-11-17 SUPPORT GRID for NUCLEAR FUEL ASSEMBLY KR101104647B1 (en)

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KR101102346B1 (en) * 2009-11-17 2012-01-03 한전원자력연료 주식회사 Appratus for Compensating Flatness of Support Grid

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57178186A (en) * 1981-04-25 1982-11-02 Mitsubishi Genshi Nenryo Kk Curve correcting device for fuel assembly
JPS57178187A (en) 1981-04-25 1982-11-02 Mitsubishi Genshi Nenryo Kk Curve correcting device for fuel assembly
KR20040029117A (en) * 2001-08-31 2004-04-03 지낸 글래스고 Automated system & method for patent drafting & technology assessment
KR20050050850A (en) * 2003-11-26 2005-06-01 한국항공우주산업 주식회사 C-type clamp
KR200429117Y1 (en) * 2006-08-04 2006-10-17 한국오에스지 주식회사 Pannel die for Correction of bolt bend

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57178186A (en) * 1981-04-25 1982-11-02 Mitsubishi Genshi Nenryo Kk Curve correcting device for fuel assembly
JPS57178187A (en) 1981-04-25 1982-11-02 Mitsubishi Genshi Nenryo Kk Curve correcting device for fuel assembly
KR20040029117A (en) * 2001-08-31 2004-04-03 지낸 글래스고 Automated system & method for patent drafting & technology assessment
KR20050050850A (en) * 2003-11-26 2005-06-01 한국항공우주산업 주식회사 C-type clamp
KR200429117Y1 (en) * 2006-08-04 2006-10-17 한국오에스지 주식회사 Pannel die for Correction of bolt bend

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