JP2005300298A - Bend measuring instrument for fuel rod - Google Patents

Bend measuring instrument for fuel rod Download PDF

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JP2005300298A
JP2005300298A JP2004115387A JP2004115387A JP2005300298A JP 2005300298 A JP2005300298 A JP 2005300298A JP 2004115387 A JP2004115387 A JP 2004115387A JP 2004115387 A JP2004115387 A JP 2004115387A JP 2005300298 A JP2005300298 A JP 2005300298A
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fuel rod
bending
fuel
amount
gantry
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JP4611657B2 (en
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Takafumi Naitou
考文 内藤
Akio Oriuchi
章男 折内
Akio Santo
明男 山藤
Masaji Mori
政次 森
Hideo Ichiba
英雄 市場
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Mitsubishi Nuclear Fuel Co Ltd
Mitsubishi Heavy Industries Ltd
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Mitsubishi Nuclear Fuel Co Ltd
Mitsubishi Heavy Industries Ltd
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    • 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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Abstract

<P>PROBLEM TO BE SOLVED: To provide a bend measuring instrument for a fuel rod, capable of measuring an accurate bend level and of grasping a complicated bend shape, without being affected by the dead weight of the fuel rod. <P>SOLUTION: This bend measuring instrument is provided with a surface plate 2 having a flat face, and a plurality of frames 3 juxtaposed with an interval provided to the surface plate 2, the fuel rod X is laid on the plurality of frames 3, and the fuel rod X is rolled to measure a bend. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、燃料棒の曲りを測定する燃料棒の曲り測定装置に関する。   The present invention relates to a fuel rod bending measuring device that measures the bending of a fuel rod.

一般に、原子炉用の燃料集合体には、複数の燃料棒が支持されている。具体的には、図６に示すように、燃料集合体１０は、所定間隔で配列された複数の支持格子１１に複数の制御棒案内管１２を挿通して固定し、制御棒案内管１２の下部に下部ノズル１３、上部に上部ノズル１４をそれぞれ取り付けている。そして、各支持格子１１の格子空間には多数の燃料棒Ｘが挿通状態で弾性的に支持されて配列されている。このような構成を有する燃料集合体１０を原子炉に配設して使用する際、多数の燃料棒Ｘや制御棒案内管１２の間隙に冷却水が流れて熱を伝達することになる。   Generally, a plurality of fuel rods are supported on a nuclear fuel assembly. Specifically, as shown in FIG. 6, the fuel assembly 10 includes a plurality of control rod guide tubes 12 inserted and fixed to a plurality of support grids 11 arranged at predetermined intervals. A lower nozzle 13 is attached to the lower part, and an upper nozzle 14 is attached to the upper part. A large number of fuel rods X are elastically supported in an inserted state in the lattice space of each support lattice 11. When the fuel assembly 10 having such a configuration is used in a nuclear reactor, the cooling water flows through the gaps between the many fuel rods X and the control rod guide tubes 12 to transmit heat.

各燃料棒Ｘの間や燃料棒Ｘと制御棒案内管１２との間にそれぞれ冷却水を通過させて熱を有効に伝達するためには、各燃料棒Ｘ間等の間隙をそれぞれ所定の寸法に保持する必要がある。各燃料棒Ｘ間等の間隙は、燃料棒Ｘの中間部が曲っていると狭くなるため、各燃料棒Ｘ間等の間隙をそれぞれ所定の寸法に保持するためには、各燃料棒Ｘの曲りを測定し、各燃料棒Ｘの曲りが許容範囲内にあることを確認する必要がある。   In order to transmit the cooling water between the fuel rods X and between the fuel rods X and the control rod guide tube 12 to effectively transfer the heat, gaps between the fuel rods X and the like have predetermined dimensions. Need to hold on. Since the gaps between the fuel rods X become narrower when the middle part of the fuel rods X is bent, in order to keep the gaps between the fuel rods X at predetermined dimensions, It is necessary to measure the bend and confirm that the bend of each fuel rod X is within an allowable range.

従来、燃料棒の曲りを測定する曲り測定方法として、例えば、燃料棒の両端部及び中間部をＶブロックのＶ溝内に支持し、Ｖブロックに内蔵された軸芯位置測定装置によって燃料棒の両端部及び中間部の軸芯位置を測定し、中間部の軸芯位置と両端部の軸芯位置を結ぶ直線との離間距離を燃料棒の曲り量として演算する方法が提供されている（例えば、特許文献１参照。）。また、燃料棒の曲りを測定する曲り測定方法として、定盤上で燃料棒を転がして、定盤と燃料棒との隙間を燃料棒の曲り量としてスキマゲージで測定する方法もある。
特許第２９９１９８４号公報 Conventionally, as a bending measuring method for measuring the bending of a fuel rod, for example, both ends and an intermediate portion of a fuel rod are supported in a V groove of a V block, and the fuel rod is measured by an axial center position measuring device built in the V block. There is provided a method of measuring the axial center positions of both end portions and the intermediate portion and calculating the distance between the axial center position of the intermediate portion and the straight line connecting the axial center positions of both end portions as the amount of bending of the fuel rod (for example, , See Patent Document 1). Further, as a bending measuring method for measuring the bending of the fuel rod, there is a method in which the fuel rod is rolled on a surface plate, and a gap between the surface plate and the fuel rod is measured with a clearance gauge as a bending amount of the fuel rod.
Japanese Patent No. 2991984

しかしながら、上記した前者の従来の曲り測定方法では、燃料棒に軸方向に重力分布がある場合、自重の加わり方が異なり、燃料棒の撓み方に影響する虞があるという問題が存在する。特に、燃料棒の曲りを測定する基準となる直線をつくる一方の端部は、他の部位より軽量であるプレナム部であるため、基準となる直線に影響を及ぼし、正確な曲り測定ができない虞がある。しかも、燃料棒の曲りは三次元方向に発生するため、前者の従来の方法では、正確な曲りを測定することができなかった。また、上記した後者の従来の曲り測定方法では、燃料棒の自重を無視しているため、本来曲っている箇所であっても自重により真直ぐとなり、曲り量を過小に評価する虞があるとともに、実際の曲り形状と異なった形状で把握される虞があるという問題が存在する。   However, in the above-described conventional bending measurement method, when the fuel rod has a gravity distribution in the axial direction, there is a problem in that the way in which the dead weight is applied is different and the deflection of the fuel rod may be affected. In particular, one end that forms a straight line that serves as a reference for measuring the bending of the fuel rod is a plenum part that is lighter than the other parts, so it may affect the reference straight line and may not be able to accurately measure the bending. There is. Moreover, since the fuel rod bends in a three-dimensional direction, the former conventional method cannot measure the bend accurately. Further, in the latter conventional bending measurement method described above, the weight of the fuel rod is ignored, so even if it is originally bent, it becomes straight due to its own weight, and the bending amount may be underestimated. There exists a problem that there exists a possibility that it may be grasped by a shape different from an actual bent shape.

本発明は、上記した従来の問題が考慮されたものであり、燃料棒の自重に影響されずに、正確な曲り量を測定するとともに複雑な曲り形状も把握することができる燃料棒の曲り測定装置を提供することを目的としている。   The present invention takes the above-described conventional problems into consideration, and measures the bending of a fuel rod that can accurately measure the amount of bending and also understand a complicated bending shape without being affected by the weight of the fuel rod. The object is to provide a device.

本発明に係る燃料棒の曲り測定装置は、平らな面を有する定盤（基準台）と、該定盤に間隔をあけて複数並設されている架台とが備えられ、複数の架台の上に燃料棒を載置させて該燃料棒を架台上で転がして曲りを測定することを特徴としている。
本発明によれば、燃料棒を架台上で転がし、燃料棒と定盤との隙間を測定することで燃料棒の曲りが測定される。このとき、燃料棒の自重による撓み量を予め算出しておき、この撓み量を考慮して燃料棒と定盤との隙間の基準値を演算し、この基準値から実際に測定された燃料棒と定盤との隙間の値を引いて曲り量を測定する。また、燃料棒を架台上で転がすことで、燃料棒の全周にわたって最大曲り量が測定され、燃料棒がどの方向にどれだけ曲っているかが把握される。 A fuel rod bending measuring apparatus according to the present invention includes a surface plate (reference table) having a flat surface and a plurality of frames arranged side by side at intervals on the surface plate. It is characterized in that the fuel rod is placed on the base plate and the fuel rod is rolled on a gantry to measure the bending.
According to the present invention, the bending of the fuel rod is measured by rolling the fuel rod on the gantry and measuring the gap between the fuel rod and the surface plate. At this time, the amount of deflection of the fuel rod due to its own weight is calculated in advance, the reference value of the gap between the fuel rod and the surface plate is calculated in consideration of this amount of deflection, and the fuel rod actually measured from this reference value is calculated. Measure the amount of bending by subtracting the value of the gap between the plate and the surface plate. Further, by rolling the fuel rod on the gantry, the maximum bending amount is measured over the entire circumference of the fuel rod, and it is possible to grasp how much the fuel rod is bent in which direction.

また、架台は、燃料棒の自重による撓み量と、燃料棒の許容曲り量とを足した高さで形成されていることが好ましい。
これによって、燃料棒が定盤に接触したか否かで燃料棒の曲りが許容範囲内にあるか把握され、燃料棒の曲りの合否が目視で一見して確認される。 Further, it is preferable that the gantry is formed with a height obtained by adding the amount of deflection of the fuel rod due to its own weight and the allowable amount of bending of the fuel rod.
Thus, it is grasped whether the bending of the fuel rod is within the allowable range based on whether the fuel rod is in contact with the surface plate, and whether the bending of the fuel rod is acceptable or not is visually confirmed.

また、複数の架台は、燃料集合体に間隔をあけて複数配置される支持格子の間隔で配設されていることが好ましい。
これによって、実際に燃料集合体に燃料棒を装着した場合における支持格子間に位置する箇所の燃料棒の曲りが測定される。支持格子の間に位置する箇所の曲りが許容範囲内であれば、各燃料棒間等の間隙が確保され、この間隙内に冷却水が十分流れて、燃料棒の熱が適度に伝達される。 Moreover, it is preferable that the plurality of mounts are arranged at intervals of support grids arranged at intervals in the fuel assembly.
As a result, the bending of the fuel rod at the location located between the support grids when the fuel rod is actually attached to the fuel assembly is measured. If the bends between the support grids are within an allowable range, a gap such as between the fuel rods is secured, and the cooling water sufficiently flows into the gap to transfer the fuel rod heat appropriately. .

また、隣り合う架台の間に配設され、燃料棒の鉛直方向の位置を検知するセンサー手段が備えられていることが好ましい。
これによって、センサー手段によって燃料棒の曲り状態が把握される。 In addition, it is preferable that sensor means is provided between adjacent pedestals to detect the position of the fuel rod in the vertical direction.
Thereby, the bending state of the fuel rod is grasped by the sensor means.

また、架台にかかる載荷重を計測する計測手段が備えられていることが好ましい。これによって、架台上に燃料棒が載せられることによる各架台にかかる荷重が計測され、燃料棒の自重による撓み量の算出精度を向上させることができる。   Moreover, it is preferable that the measurement means which measures the load applied to a mount frame is provided. As a result, the load applied to each gantry when the fuel rod is placed on the gantry is measured, and the calculation accuracy of the deflection amount due to the weight of the fuel rod can be improved.

本発明に係る燃料棒の曲り測定装置によれば、燃料棒の自重による撓み量を考慮した燃料棒と定盤との隙間の基準値から実際に測定された燃料棒と定盤との隙間の値を引くことで、燃料棒の曲り量を測定することができ、燃料棒の自重に影響されることなく、正確な曲り量を測定することができ、また、燃料棒を架台上で転がしながら曲りを測定するため、燃料棒の全周にわたって最大曲り量が測定され、燃料棒がどの方向にどれだけ曲っているかが把握することができ、燃料棒の形状を三次元方向から正確に把握することができる。   According to the fuel rod bending measuring apparatus according to the present invention, the gap between the fuel rod and the surface plate actually measured from the reference value of the gap between the fuel rod and the surface plate in consideration of the deflection amount due to the weight of the fuel rod. By subtracting the value, the amount of bending of the fuel rod can be measured, and the accurate amount of bending can be measured without being affected by the weight of the fuel rod, and while the fuel rod is rolling on the gantry In order to measure the bend, the maximum bend amount is measured over the entire circumference of the fuel rod, it is possible to grasp how much the fuel rod is bent in which direction, and accurately grasp the shape of the fuel rod from the three-dimensional direction be able to.

以下、本発明に係る燃料棒の曲り測定装置の実施の形態について、図面に基いて説明する。   Embodiments of a fuel rod bending measuring apparatus according to the present invention will be described below with reference to the drawings.

図１は燃料棒Ｘの曲りを測定する燃料棒Ｘの曲り測定装置１の側面図であり、図２は曲り測定装置１の平面図である。
図１，図２に示すように、燃料棒Ｘの曲りを測定する曲り測定装置１は、平らな上面２ａを有する定盤２と、上面２ａに間隔をあけて複数並設されている架台３と、架台３上の燃料棒Ｘの鉛直方向の位置を検知するセンサー手段４とから構成されている。 FIG. 1 is a side view of a fuel rod X bend measuring device 1 that measures the bend of the fuel rod X, and FIG. 2 is a plan view of the bend measuring device 1.
As shown in FIGS. 1 and 2, a bending measuring device 1 for measuring the bending of a fuel rod X includes a surface plate 2 having a flat upper surface 2a and a plurality of bases 3 arranged in parallel with the upper surface 2a at intervals. And sensor means 4 for detecting the vertical position of the fuel rod X on the gantry 3.

架台３は上端が半球状のものであり、複数の架台３は一定方向に平行にそれぞれ延在されている。架台３は、定盤２の上面２ａに固定されており、上面２ａからの高さＨが燃料棒Ｘの自重による撓み量と、燃料棒Ｘの許容曲り量とを足した高さに形成されている。燃料棒Ｘの自重による撓み量は、燃料棒Ｘを架台３上に水平状態で架設させたときの架台３間における撓み量であり、燃料棒Ｘの許容曲り量は、複数の燃料棒Ｘを配列させて燃料集合体を形成させるときの冷却水が流通するために十分な間隔が確保できる程度の燃料棒Ｘの曲り量である。また、複数の架台３は、間隔をあけて複数配置される図６に示す支持格子１１の間隔Ｌで配設されている。   The gantry 3 has a hemispherical upper end, and the gantry 3 extends in parallel in a certain direction. The gantry 3 is fixed to the upper surface 2 a of the surface plate 2, and the height H from the upper surface 2 a is formed such that the amount of deflection of the fuel rod X due to its own weight and the allowable bending amount of the fuel rod X are added. ing. The amount of deflection of the fuel rod X due to its own weight is the amount of deflection between the gantry 3 when the fuel rod X is installed horizontally on the gantry 3, and the allowable bending amount of the fuel rod X is equal to the number of fuel rods X. The amount of bending of the fuel rod X is such that a sufficient interval can be secured for cooling water to flow when the fuel assembly is formed by arranging. Further, the plurality of mounts 3 are arranged at intervals L of the support grids 11 shown in FIG.

図３（ａ），図３（ｂ）は曲り測定装置１の断面図である。図３（ａ），図３（ｂ）に示すように、センサー手段４は、投光部４ａと受光部４ｂとから構成される非接触型のセンサー（光電センサー）からなり、隣り合う架台３の間に燃料棒Ｘを挟んで投光部４ａと受光部４ｂとが互いに向かい合うように配設されている。センサー手段４は、図３（ａ）に示すように、投光部４ａから光Ｒを送り、この光Ｒを受光部４ｂで受け取ることで燃料棒Ｘと定盤２との間に隙間があることを確認するものであり、図３（ｂ）に示すように、投光部４ａから送った光Ｒが架台３上の燃料棒Ｘによって遮られて受光部４ｂに届かなくなると燃料棒Ｘと定盤２との間に隙間がないことを表す信号を発するものである。つまり、光Ｒの透過の有無によって燃料棒Ｘが定盤２の上面２ａに接触したどうかが把握される。   FIGS. 3A and 3B are cross-sectional views of the bending measuring device 1. As shown in FIGS. 3 (a) and 3 (b), the sensor means 4 is composed of a non-contact type sensor (photoelectric sensor) composed of a light projecting unit 4a and a light receiving unit 4b. The light projecting portion 4a and the light receiving portion 4b are disposed so as to face each other with the fuel rod X interposed therebetween. As shown in FIG. 3A, the sensor means 4 transmits light R from the light projecting unit 4a and receives the light R by the light receiving unit 4b, so that there is a gap between the fuel rod X and the surface plate 2. As shown in FIG. 3B, when the light R sent from the light projecting portion 4a is blocked by the fuel rod X on the gantry 3 and does not reach the light receiving portion 4b, the fuel rod X A signal indicating that there is no gap between the surface plate 2 is generated. That is, whether or not the fuel rod X has contacted the upper surface 2a of the surface plate 2 can be grasped based on whether or not the light R is transmitted.

また、各架台３には、各々の架台３にかかる載荷重を計測する計測器（計測手段）５がそれぞれ内蔵されている。計測器５は、燃料棒Ｘが載せられることによって、どれくらいの荷重が各架台３に作用しているのかを計測するものである。なお、計測器５は架台３に内蔵されていないものでもよく、計測器を例えば架台３と定盤２との間に介在させてもよい。このように、各架台３にかかる荷重を計測することにより、燃料棒Ｘの自重による撓み量の算出精度を向上させることができる。   Each gantry 3 has a built-in measuring instrument (measuring means) 5 for measuring the load applied to each gantry 3. The measuring instrument 5 measures how much load is applied to each gantry 3 when the fuel rod X is placed thereon. Note that the measuring instrument 5 may not be built in the gantry 3, and the measuring instrument may be interposed between the gantry 3 and the surface plate 2, for example. Thus, by measuring the load applied to each gantry 3, it is possible to improve the calculation accuracy of the deflection amount due to the own weight of the fuel rod X.

次に、上記した構成からなる曲り測定装置１を使用して燃料棒Ｘの曲りを測定する燃料棒Ｘの曲り測定方法について説明する。   Next, the bending measurement method of the fuel rod X that measures the bending of the fuel rod X using the bending measuring device 1 having the above-described configuration will be described.

まず、定盤２の平らな上面２ａに間隔をあけて複数並設された架台３の上に燃料棒Ｘを載置する。具体的には、燃料棒Ｘを架台３に直交する方向に延在させ、複数の架台３に架け渡すように配置する。また、架台３間に位置する燃料棒Ｘの中間部は自重により若干撓むため、燃料棒Ｘの自重による撓み量を予め算出しておく。   First, the fuel rods X are placed on the gantry 3 provided in parallel with a space on the flat upper surface 2 a of the surface plate 2. Specifically, the fuel rods X are arranged so as to extend in a direction orthogonal to the gantry 3 and span the plurality of gantry 3. Further, since the intermediate portion of the fuel rod X located between the gantry 3 is slightly bent due to its own weight, the amount of deflection due to its own weight is calculated in advance.

次に、架台３上の燃料棒Ｘを架台３上で転がしながら、センサー手段４によって燃料棒Ｘと定盤２との隙間を測定する。具体的には、燃料棒Ｘを架台３上で転がしながら、投光部４ａから受光部４ｂに向けて光Ｒを送る。燃料棒Ｘに許容範囲以上の曲りがあって燃料棒Ｘが定盤２の上面２ａに接触した場合、投光部４ａからの光Ｒが架台３上の燃料棒Ｘによって遮られて受光部４ｂに届かなくなる。受光部４ｂに光Ｒが届かなくなると、許容範囲以上の曲りが生じていることを知らせるために信号が発せられる。   Next, the gap between the fuel rod X and the surface plate 2 is measured by the sensor means 4 while rolling the fuel rod X on the frame 3 on the frame 3. Specifically, the light R is sent from the light projecting unit 4 a to the light receiving unit 4 b while rolling the fuel rod X on the gantry 3. When the fuel rod X is bent beyond the allowable range and the fuel rod X comes into contact with the upper surface 2a of the surface plate 2, the light R from the light projecting portion 4a is blocked by the fuel rod X on the gantry 3 and the light receiving portion 4b. Will not reach. When the light R does not reach the light receiving unit 4b, a signal is issued to notify that a bend exceeding the allowable range has occurred.

上記した構成からなる燃料棒Ｘの曲り測定装置１によれば、燃料棒Ｘの自重による撓み量を予め算出し、燃料棒Ｘと定盤２の上面２ａとの離間距離（隙間）がセンサー手段４によって測定されるため、燃料棒Ｘと定盤２の上面２ａとの離間距離を測定することで、燃料棒Ｘは、燃料棒Ｘの自重に影響されることなく、正確な曲り量を測定することができる。また、燃料棒Ｘは架台３上で転がしながら曲り量が測定されるため、燃料棒Ｘの全周にわたって最大曲り量が測定される。これによって、燃料棒Ｘがどの方向に曲っているかが正確に把握することができ、燃料棒Ｘの形状を三次元方向から正確に把握することができる。   According to the bending measuring device 1 of the fuel rod X having the above-described configuration, the deflection amount due to the weight of the fuel rod X is calculated in advance, and the separation distance (gap) between the fuel rod X and the upper surface 2a of the surface plate 2 is the sensor means. 4, by measuring the distance between the fuel rod X and the upper surface 2 a of the surface plate 2, the fuel rod X can measure an accurate amount of bending without being affected by the weight of the fuel rod X. can do. Further, since the bending amount of the fuel rod X is measured while rolling on the gantry 3, the maximum bending amount is measured over the entire circumference of the fuel rod X. Thereby, it is possible to accurately grasp in which direction the fuel rod X is bent, and it is possible to accurately grasp the shape of the fuel rod X from the three-dimensional direction.

具体的に説明すると、図４（ａ）は定盤上で燃料棒Ｘを転がす従来の方法によって測定された燃料棒Ｘの曲り量を表すグラフであり、図４（ｂ）は本発明に係る曲り測定装置１および曲り測定方法によって測定された燃料棒Ｘの曲り量を表すグラフである。図４（ａ），図４（ｂ）に示すように、従来の方法では、燃料棒Ｘの自重を無視しているため、複雑な曲り形状を把握することはできず、曲り量を過小評価しているが、本発明では、解析にて求めた自重による撓み量を除いて評価されるため、燃料棒Ｘの曲り量を正確に評価することができ、複雑な曲り形状も把握することができる。   Specifically, FIG. 4 (a) is a graph showing the amount of bending of the fuel rod X measured by a conventional method of rolling the fuel rod X on a surface plate, and FIG. 4 (b) relates to the present invention. 4 is a graph showing the amount of bending of a fuel rod X measured by a bending measuring device 1 and a bending measuring method. As shown in FIGS. 4 (a) and 4 (b), in the conventional method, the weight of the fuel rod X is ignored, so a complicated bent shape cannot be grasped, and the bending amount is underestimated. However, in the present invention, since the evaluation is performed excluding the amount of bending due to its own weight obtained in the analysis, the bending amount of the fuel rod X can be accurately evaluated, and the complicated bending shape can be grasped. it can.

また、架台３は、燃料棒Ｘの自重による撓み量と、燃料棒Ｘの許容曲り量とを足した高さで形成されているため、燃料棒Ｘが架台３に接触したか否かで燃料棒Ｘの曲りが許容範囲内にあるか把握され、燃料棒Ｘの曲りの合否が目視で一見して確認される。これによって、燃料棒Ｘの曲りの合否判断を容易に行うことができる。   Further, since the gantry 3 is formed with a height obtained by adding the deflection amount of the fuel rod X due to its own weight and the allowable bending amount of the fuel rod X, the fuel depends on whether the fuel rod X has contacted the gantry 3 or not. Whether or not the bending of the rod X is within the allowable range is grasped, and whether or not the fuel rod X is bent is visually confirmed. This makes it possible to easily determine whether or not the fuel rod X is bent.

また、複数の架台３は、燃料集合体１０に間隔をあけて複数配置される支持格子１１の間隔で配設されているため、燃料集合体１０に燃料棒Ｘを装着した場合における支持格子１１間に位置する箇所の燃料棒Ｘの曲りが測定され、支持格子１１間に位置する箇所の燃料棒Ｘの曲り量は許容範囲内にすることができる。これによって、冷却水が流通する各燃料棒Ｘ間等の間隙は十分に確保され、燃料棒Ｘの熱を適度に伝達することができる。   Further, since the plurality of mounts 3 are arranged at intervals of the support grids 11 that are arranged at intervals on the fuel assembly 10, the support grids 11 when the fuel rods X are attached to the fuel assembly 10. The bending of the fuel rod X at the location located between them is measured, and the bending amount of the fuel rod X at the location located between the support grids 11 can be within an allowable range. As a result, a sufficient gap is ensured between the fuel rods X through which the cooling water flows, and the heat of the fuel rods X can be transmitted appropriately.

また、隣り合う架台３の間に配設されて燃料棒Ｘの鉛直方向の位置を検知するセンサー手段４が備えられているため、センサー手段４によって燃料棒Ｘの曲り状態が把握される。これによって、容易且つ正確に燃料棒Ｘの曲り状態を把握することができる。   Further, since the sensor means 4 is provided between the adjacent mounts 3 and detects the position of the fuel rod X in the vertical direction, the sensor means 4 grasps the bent state of the fuel rod X. Thereby, the bent state of the fuel rod X can be grasped easily and accurately.

また、架台３にかかる載荷重を計測する計測器５が備えられているため、架台３上に燃料棒Ｘが載せられることによって各架台３にどれくらいの荷重がかかっているかが計測される。この計測データを基に燃焼棒Ｘの自重による撓み量の算出精度を向上させることができ、より正確に燃焼棒Ｘの曲りを補正することができる。   In addition, since the measuring device 5 that measures the loading load applied to the gantry 3 is provided, it is measured how much load is applied to each gantry 3 by placing the fuel rod X on the gantry 3. Based on this measurement data, the calculation accuracy of the amount of deflection due to the weight of the combustion rod X can be improved, and the bending of the combustion rod X can be corrected more accurately.

以上、本発明に係る燃料棒の曲り測定装置の実施の形態について説明したが、本発明は上記した実施の形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。例えば、上記した実施の形態では、架台３は燃料棒Ｘの自重による撓み量と燃料棒Ｘの許容曲り量とを足した高さに形成され、架台３上の燃料棒Ｘが定盤２の上面２ａに接触したかどうかはセンサー手段４によって検知されるが、本発明は、燃料棒Ｘと定盤２との隙間の有無を目視によって確認してもよい。また、図５に示すように、架台２０の高さｈを燃料棒Ｘの自重による撓み量と燃料棒Ｘの許容曲り量とを足した高さよりも高く形成してもよく、燃料棒Ｘと定盤２１との離間距離Ａをスキマゲージ等で測定してもよい。このとき、予め燃料棒Ｘの自重による撓み量を算出しておき、撓みも曲りも無い場合の燃料棒Ｘと定盤２１との離間距離Ｏから自重による撓み量と燃料棒Ｘの許容曲り量とを引いて燃料棒Ｘと定盤２１との離間距離の基準値Ｂを演算し、この基準値Ｂから実際に測定された燃料棒Ｘと定盤２１との離間距離Ａを引いて燃料棒Ｘの曲り量を測定する。これによって、燃料棒Ｘの曲げ量が許容範囲よりどれくらいオーバーしているかを測定することができる。   The embodiment of the fuel rod bending measuring device according to the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope of the present invention. For example, in the above-described embodiment, the gantry 3 is formed to have a height obtained by adding the deflection amount of the fuel rod X due to its own weight and the allowable bending amount of the fuel rod X, and the fuel rod X on the gantry 3 is Whether or not the upper surface 2a has been touched is detected by the sensor means 4, but in the present invention, the presence or absence of a gap between the fuel rod X and the surface plate 2 may be visually confirmed. Further, as shown in FIG. 5, the height h of the gantry 20 may be formed higher than the sum of the amount of deflection of the fuel rod X due to its own weight and the allowable amount of bending of the fuel rod X. The distance A from the surface plate 21 may be measured with a clearance gauge or the like. At this time, the amount of deflection of the fuel rod X due to its own weight is calculated in advance, and the amount of deflection due to its own weight and the allowable amount of bending of the fuel rod X from the distance O between the fuel rod X and the surface plate 21 when there is no deflection or bending. To calculate a reference value B of the separation distance between the fuel rod X and the surface plate 21, and subtract the distance A between the fuel rod X and the surface plate 21 actually measured from the reference value B to obtain the fuel rod. Measure the bending amount of X. Thereby, it is possible to measure how much the bending amount of the fuel rod X exceeds the allowable range.

また、上記した実施の形態では、架台３は定盤２の上面２ａに固定されているが、本発明は、架台を上下方向に出し入れ可能に、或いは横移動可能に定盤２に形成してもよい。これによって、自重による曲げ量が異なる燃料棒毎に架台の高さを調節することができ、或いは支持格子数や支持格子間ピッチの異なる燃料棒用に切り替えることができ、多種の燃料棒に対応することができる。   Further, in the above-described embodiment, the gantry 3 is fixed to the upper surface 2a of the surface plate 2, but the present invention is formed on the surface plate 2 so that the gantry can be taken in and out in the vertical direction or can be moved laterally. Also good. As a result, the height of the gantry can be adjusted for each fuel rod with a different bending amount due to its own weight, or it can be switched to a fuel rod with a different number of support grids or pitches between support grids. can do.

本発明に係る燃料棒の曲げ測定装置の実施の形態を説明するための側面図である。It is a side view for demonstrating embodiment of the bending measuring apparatus of the fuel rod which concerns on this invention. 本発明に係る燃料棒の曲げ測定装置の実施の形態を説明するための平面図である。It is a top view for demonstrating embodiment of the bending measuring apparatus of the fuel rod which concerns on this invention. （ａ）（ｂ）ともに本発明に係る燃料棒の曲げ測定装置の実施の形態を説明するための断面図である。(A) (b) is sectional drawing for demonstrating embodiment of the bending measuring apparatus of the fuel rod which concerns on this invention. 本発明に係る燃料棒の曲げ測定装置の実施の測定例を表す測定結果のグラフである。It is a graph of the measurement result showing the measurement example of implementation of the bending measuring apparatus of the fuel rod which concerns on this invention. 本発明に係る燃料棒の曲げ測定装置のその他の実施の形態を説明するための側面図である。It is a side view for demonstrating other embodiment of the bending measuring apparatus of the fuel rod which concerns on this invention. 一般的な原子炉用の燃料集合体の構成を説明するための正面図である。It is a front view for demonstrating the structure of the fuel assembly for general reactors.

符号の説明Explanation of symbols

１ 曲り測定装置
２ 定盤
３ 架台
４ センサー手段
５ 計測器（計測手段）
１１ 支持格子
Ｘ 燃料棒

DESCRIPTION OF SYMBOLS 1 Bending measuring apparatus 2 Surface plate 3 Base 4 Sensor means 5 Measuring instrument (measuring means)
11 Support grid X Fuel rod

Claims (5)

平らな面を有する定盤と、該定盤に間隔をあけて複数並設されている架台とが備えられ、複数の前記架台の上に燃料棒を載置させて該燃料棒を前記架台上で転がして曲りを測定することを特徴とする燃料棒の曲り測定装置。   A surface plate having a flat surface and a plurality of bases arranged in parallel with the surface plate with a space therebetween are provided, and fuel rods are placed on the bases to place the fuel rods on the bases. A fuel rod bend measuring device, characterized in that the bend is measured by rolling in a fuel cell. 請求項１記載の燃料棒の曲り測定装置において、
前記架台は、前記燃料棒の自重による撓み量と、前記燃料棒の許容曲り量とを足した高さで形成されていることを特徴とする燃料棒の曲り測定装置。 The fuel rod bending measuring device according to claim 1,
2. The fuel rod bending measuring apparatus according to claim 1, wherein the pedestal is formed with a height obtained by adding a deflection amount of the fuel rod due to its own weight and an allowable bending amount of the fuel rod. 請求項１または２記載の燃料棒の曲り測定装置において、
複数の前記架台は、間隔をあけて複数配置される支持格子の間隔で配設されていることを特徴とする燃料棒の曲り測定装置。 The fuel rod bending measuring device according to claim 1 or 2,
The fuel rod bending measuring apparatus, wherein the plurality of mounts are arranged at intervals of a plurality of support grids arranged at intervals. 請求項１から３のいずれか記載の燃料棒の曲り測定装置において、
隣り合う前記架台の間に配設され、前記燃料棒の鉛直方向の位置を検知するセンサー手段が備えられていることを特徴とする燃料棒の曲り測定装置。 In the fuel rod bending measuring device according to any one of claims 1 to 3,
A fuel rod bending measuring device, characterized in that it is provided between adjacent pedestals and includes sensor means for detecting a vertical position of the fuel rod. 請求項１から４のいずれか記載の燃料棒の曲り測定装置において、
前記架台にかかる載荷重を計測する計測手段が備えられていることを特徴とする燃料棒の曲り測定装置。

In the fuel rod bending measuring device according to any one of claims 1 to 4,
A fuel rod bending measuring device comprising measuring means for measuring a load applied to the gantry.

JP2004115387A 2004-04-09 2004-04-09 Fuel rod bending measuring device Expired - Lifetime JP4611657B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3093611A3 (en) * 2015-05-15 2017-03-08 Q-TECH S.r.l. Measuring method and device to measure the straightness error of bars and pipes
IT201700122452A1 (en) * 2017-10-27 2019-04-27 Q Tech S R L Method and apparatus for measuring the straightness error of slender bodies, with compensation for deformation by gravity
EP3225320B1 (en) 2016-04-02 2020-07-15 MSG Maschinenbau GmbH Device and method for measuring the straightness of a rod-shaped workpiece

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55416A (en) * 1978-05-08 1980-01-05 Citizen Watch Co Ltd Curvature meter of fuel rod of atomic reactor
JPS6171307A (en) * 1984-09-17 1986-04-12 Nippon Steel Corp Measuring method of curve of tubular rod body
JPH0181598U (en) * 1987-11-20 1989-05-31
JPH034110A (en) * 1989-06-01 1991-01-10 Mitsubishi Nuclear Fuel Co Ltd Inspection on instrument for straightness of rod-shaped body
JPH10185552A (en) * 1996-12-25 1998-07-14 Power Reactor & Nuclear Fuel Dev Corp Straightness-inspecting apparatus
JP2991984B2 (en) * 1997-01-09 1999-12-20 日本ニユクリア・フユエル株式会社 Method and apparatus for measuring bending amount of nuclear fuel rod

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55416A (en) * 1978-05-08 1980-01-05 Citizen Watch Co Ltd Curvature meter of fuel rod of atomic reactor
JPS6171307A (en) * 1984-09-17 1986-04-12 Nippon Steel Corp Measuring method of curve of tubular rod body
JPH0181598U (en) * 1987-11-20 1989-05-31
JPH034110A (en) * 1989-06-01 1991-01-10 Mitsubishi Nuclear Fuel Co Ltd Inspection on instrument for straightness of rod-shaped body
JPH10185552A (en) * 1996-12-25 1998-07-14 Power Reactor & Nuclear Fuel Dev Corp Straightness-inspecting apparatus
JP2991984B2 (en) * 1997-01-09 1999-12-20 日本ニユクリア・フユエル株式会社 Method and apparatus for measuring bending amount of nuclear fuel rod

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3093611A3 (en) * 2015-05-15 2017-03-08 Q-TECH S.r.l. Measuring method and device to measure the straightness error of bars and pipes
EP3225320B1 (en) 2016-04-02 2020-07-15 MSG Maschinenbau GmbH Device and method for measuring the straightness of a rod-shaped workpiece
IT201700122452A1 (en) * 2017-10-27 2019-04-27 Q Tech S R L Method and apparatus for measuring the straightness error of slender bodies, with compensation for deformation by gravity
WO2019082134A1 (en) * 2017-10-27 2019-05-02 Q-Tech S.R.L. Method and apparatus for measuring the straightness error of slender bodies, with compensation of gravity deformation
US11378393B2 (en) 2017-10-27 2022-07-05 Q-Tech S.R.L Method and apparatus for measuring the straightness error of slender bodies, with compensation of gravity deformation
DE202018006880U1 (en) 2017-10-27 2024-02-02 Q-TECH Srl Apparatus for measuring the straightness error of slender bodies, with compensation for deformation caused by gravity, and system with such an apparatus
DE202018006881U1 (en) 2017-10-27 2024-02-06 Q-TECH Srl Apparatus for measuring the straightness error of slender bodies, with compensation for deformation caused by gravity, and system with such an apparatus

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