JP2009168641A

JP2009168641A - Method and apparatus for inspecting fuel assembly dimension

Info

Publication number: JP2009168641A
Application number: JP2008007541A
Authority: JP
Inventors: Keisuke Kurihara; 圭祐栗原; Masatoshi Itagaki; 昌利板垣; Hiromi Tajiri; 裕実田尻; Ryoji Toseki; 良治東石; Kunihiko Iwama; 国彦岩間; Shinji Nagano; 真士長野; Tsuyoaki Suzuki; 剛明鈴木
Original assignee: Hitachi GE Nuclear Energy Ltd
Current assignee: Hitachi GE Nuclear Energy Ltd
Priority date: 2008-01-17
Filing date: 2008-01-17
Publication date: 2009-07-30
Anticipated expiration: 2028-01-17
Also published as: JP5011135B2

Abstract

PROBLEM TO BE SOLVED: To provide a method and apparatus for inspecting fuel assembly dimensions for safely and accurately measuring the dimensions between fuel rods of a fuel assembly including a water rod. SOLUTION: In this fuel assembly dimensionss inspecting method, reflectors 200a and 200b are inserted between the water rod 101 and the fuel rods 100, light emitted by an illuminating means 400 arranged on the side opposite to the water rod 101 with respect to the inserted reflectors 200a and 200b is reflected by the inserted reflectors 200a and 200b, and is transmitted between the fuel rods 100 on the side opposite to the water rod 101, the transmitted light is imaged by an imaging means 300 arranged on the side opposite to the water rod 101, the width of the light transmitted between the fuel rods 100 is measured based on the image taken by the imaging means 300, thereby measuring the interval dimensionss between the fuel rods 100 on the side opposite to the water rod 101. COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、ウォータロッドを含む燃料体のウォータロッド前面に配置されている燃料棒間隔を測定する燃料体寸法検査方法および燃料体寸法検査装置に関する。 The present invention relates to a fuel body dimension inspection method and a fuel body dimension inspection apparatus for measuring a distance between fuel rods arranged in front of a water rod of a fuel body including a water rod.

従来、原子炉燃料体であるＵＯ_２(酸化ウラン)燃料棒が集合した燃料体の検査では、検査員による直接の手作業により試験用治具などを用いて燃料棒間隔が規定寸法以上にあるか判定する検査を行っている。
しかし、ＭＯＸ (混合酸化物)燃料体では、放射線による作業員の被曝が想定され、作業員の労力負担低減、被曝防止等を目的として自動検査装置が提案されている(例えば、特許文献１、２)。
この自動検査装置によるウォータロッドと燃料棒の間隔を測定する方法としては、燃料体背面の照明による燃料棒間を透過した光を、燃料体前面に配置した撮像器で捉え、燃料棒の間隔を測定する方法がある。 Conventionally, in the inspection of a fuel body in which UO ₂ (uranium oxide) fuel rods, which are nuclear reactor fuel bodies, are assembled, the distance between the fuel rods is greater than a specified dimension using a test jig or the like by direct manual work by an inspector. An inspection to determine whether or not.
However, in MOX (mixed oxide) fuel bodies, exposure of workers due to radiation is assumed, and an automatic inspection device has been proposed for the purpose of reducing labor burden on workers and preventing exposure (for example, Patent Document 1, 2).
As a method of measuring the distance between the water rod and the fuel rod by this automatic inspection device, the light transmitted between the fuel rods by the illumination on the back surface of the fuel body is captured by an imager disposed in front of the fuel body, and the distance between the fuel rods is measured. There is a way to measure.

例えば、特許文献１には、燃料体の燃料棒間隔を測定する自動検査装置として、燃料体背面より照明をあて、燃料棒の間を透過した光を燃料体前面に設置された撮像機器で撮像して画像処理を行い、その結果を用いて、最小の燃料棒間の間隔寸法を測定し、燃料棒間隔が規定寸法以上にあるか否かを判定する方法が記載されている。なお、本方法では、複数のＵＯ_２燃料棒の中央に配置されたウォータロッド前面の燃料棒間隔は、前面の照明の光をウォータロッドに反射させ、その反射光を捉えることにより寸法測定している(特許文献１の段落００２３、図４、図５参照)。
特開２０００−９８８０号公報(段落００２３、図４、図５等) 特開平１１−３３７６７９号公報(段落００１５、図４等) For example, in Patent Document 1, as an automatic inspection device for measuring the distance between fuel rods of a fuel body, light is illuminated from the back of the fuel body and light transmitted between the fuel rods is captured by an imaging device installed on the front of the fuel body. A method is described in which image processing is performed, and using the result, the distance between the fuel rods is measured to determine whether or not the distance between the fuel rods is equal to or greater than a specified dimension. In this method, the distance between the fuel rods in front of the water rods arranged at the center of the plurality of UO ₂ fuel rods is measured by reflecting the light of the front illumination to the water rods and capturing the reflected light. (See paragraph 0023, FIG. 4 and FIG. 5 of Patent Document 1).
Japanese Unexamined Patent Publication No. 2000-9880 (paragraph 0023, FIG. 4, FIG. 5, etc.) JP 11-337679 A (paragraph 0015, FIG. 4 etc.)

ところで、上述のウォータロッドを含む燃料体のウォータロッド前面にある燃料棒間隔を、燃料体前面の照明の光をウォータロッドにあてた反射光により測定する場合、ウォータロッドの反射面が円筒面となっているために反射光が拡散する。そのため、照明の光の円筒面であるウォータロッド表面からの反射光は、照度が低くなる。 By the way, when the distance between the fuel rods on the front surface of the water rod of the fuel body including the water rod described above is measured by the reflected light applied to the water rod on the front surface of the fuel body, the reflective surface of the water rod is different from the cylindrical surface. Therefore, the reflected light diffuses. Therefore, the reflected light from the surface of the water rod, which is the cylindrical surface of the illumination light, has low illuminance.

本発明は上記実状に鑑み、ウォータロッドを含む燃料体の燃料棒間の寸法を安全かつ精度高く測定可能な燃料体寸法検査方法および燃料体寸法検査装置の提供を目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fuel body dimension inspection method and a fuel body dimension inspection apparatus that can measure the dimensions between fuel rods of a fuel body including a water rod safely and accurately.

上記目的を達成するべく、第１の本発明に関わる燃料体寸法検査方法は、ウォータロッドと該ウォータロッドを囲んで配置される燃料棒とを含む燃料体における前記燃料棒間の間隔寸法を測定をする燃料体寸法検査方法であって、反射板を前記ウォータロッドと前記燃料棒間に挿入し、前記挿入された反射板に対して反ウォータロッド側に配置される照明手段より発せられる光を前記挿入された反射板で反射させ、前記反ウォータロッド側に配置される燃料棒間を透過させ、該透過した光を前記反ウォータロッド側に配置される撮像手段により撮像し、該撮像手段により撮像された画像から前記燃料棒間を透過する光の幅を測定することにより、前記反ウォータロッド側の前記燃料棒間の間隔寸法を測定している。 In order to achieve the above object, a fuel body size inspection method according to a first aspect of the present invention measures a distance between the fuel rods in a fuel body including a water rod and a fuel rod disposed so as to surround the water rod. A method for inspecting a fuel body size, comprising: inserting a reflector between the water rod and the fuel rod; and emitting light emitted from an illuminating means disposed on the side opposite to the water rod with respect to the inserted reflector. Reflected by the inserted reflector, transmitted between the fuel rods arranged on the anti-water rod side, and imaged by the imaging means arranged on the anti-water rod side, and by the imaging means The distance between the fuel rods on the anti-water rod side is measured by measuring the width of light transmitted between the fuel rods from the captured image.

第２の本発明に関わる燃料体寸法検査方法は、ウォータロッドと該ウォータロッドを囲んで配置される燃料棒とを含む燃料体における前記燃料棒間の寸法測定をする燃料体寸法検査方法であって、発光手段を前記ウォータロッドと前記燃料棒間に挿入し、前記挿入された発光手段より発せられる光を前記燃料棒間を透過させ、該透過した光を前記発光手段に対して反ウォータロッド側に配置される撮像手段により撮像し、該撮像手段により撮像された画像から前記燃料棒間を透過する光の幅を測定することにより、前記反ウォータロッド側の前記燃料棒間の間隔寸法を測定している。 A fuel body size inspection method according to a second aspect of the present invention is a fuel body size inspection method for measuring a dimension between fuel rods in a fuel body including a water rod and a fuel rod disposed so as to surround the water rod. The light emitting means is inserted between the water rod and the fuel rod, the light emitted from the inserted light emitting means is transmitted between the fuel rods, and the transmitted light is anti-water rod against the light emitting means. The distance between the fuel rods on the anti-water rod side is determined by measuring the width of light transmitted between the fuel rods from the image captured by the imaging means disposed on the side. Measuring.

第３の本発明に関わる燃料体寸法検査装置は、ウォータロッドと該ウォータロッドを囲んで配置される燃料棒とを含む燃料体における前記燃料棒間の寸法を測定をする燃料体寸法検査装置であって、反射板を前記ウォータロッドと前記燃料棒の間に挿入する反射板位置決め挿入手段と、前記挿入された反射板に対して反ウォータロッド側に配置される照明手段と、前記反ウォータロッド側に配置され、前記照明手段より発せられる光が前記反射板により反射され、該反射光が前記反ウォータロッド側に配置される前記燃料棒の間を透過した光を撮像する撮像手段と、前記撮像手段により撮像された画像から前記燃料棒間を透過する光の幅を測定することにより、前記反ウォータロッド側の燃料棒の間の間隔寸法を測定する測定手段とを備えている。 A fuel body size inspection device according to a third aspect of the present invention is a fuel body size inspection device for measuring a dimension between fuel rods in a fuel body including a water rod and a fuel rod disposed so as to surround the water rod. A reflecting plate positioning insertion means for inserting a reflecting plate between the water rod and the fuel rod; an illuminating means disposed on the anti-water rod side with respect to the inserted reflecting plate; and the anti-water rod. Imaging means for imaging light that is disposed on the side and reflected by the reflector, and the reflected light is transmitted between the fuel rods disposed on the anti-water rod side; and Measuring means for measuring the distance between the fuel rods on the anti-water rod side by measuring the width of light transmitted between the fuel rods from the image captured by the imaging means. That.

第４の本発明に関わる燃料体寸法検査装置は、ウォータロッドと該ウォータロッドを囲んで配置される燃料棒とを含む燃料体における前記燃料棒間の間隔寸法を測定する燃料体寸法検査装置であって、発光手段を前記ウォータロッドと前記燃料棒の間に挿入する発光位置決め挿入手段と、前記発光手段に対して反ウォータロッド側に配置され、前記発光手段より発せられ前記反ウォータロッド側に配置される前記燃料棒の間を透過した光を撮像する撮像手段と、前記撮像手段により撮像された画像から前記燃料棒間を透過する光の幅を測定することにより、前記反ウォータロッド側の燃料棒の間の間隔寸法を測定する測定手段とを備えている。 A fuel body size inspection device according to a fourth aspect of the present invention is a fuel body size inspection device for measuring a distance between the fuel rods in a fuel body including a water rod and a fuel rod disposed so as to surround the water rod. A light emitting positioning insertion means for inserting a light emitting means between the water rod and the fuel rod; and a light emitting positioning insertion means arranged on the side opposite to the water rod relative to the light emitting means, and is emitted from the light emitting means toward the anti water rod side. Imaging means for imaging light transmitted between the fuel rods disposed, and measuring the width of the light transmitted between the fuel rods from the image captured by the imaging means, Measuring means for measuring the distance between the fuel rods.

本発明によれば、ウォータロッドを含む燃料体の燃料棒間の間隔寸法を安全かつ精度高く測定できる燃料体寸法検査方法および燃料体寸法検査装置を実現できる。 ADVANTAGE OF THE INVENTION According to this invention, the fuel body dimension test | inspection method and fuel body dimension test | inspection apparatus which can measure the space | interval dimension between the fuel rods of a fuel body containing a water rod safely and with high precision are realizable.

以下、本発明の実施形態について添付図面を参照して説明する。
本発明は、光の拡散による燃料棒1OO間の間隔寸法の測定精度低下を防ぐという目的を、単純な機構により実現したものである。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
The object of the present invention is to achieve the object of preventing the measurement accuracy of the distance between the fuel rods 1OO from being reduced by light diffusion by a simple mechanism.

＜＜第１実施形態＞＞
＜燃料体寸法検査装置Ｓ１の構成＞
図１は、本発明に係わる第１実施形態の燃料体寸法検査装置Ｓ１の概略斜視図である。
図１に示すように、本発明に係わる第１実施形態の燃料体寸法検査装置Ｓ１は、据え付け面Ｇに載置される底板Ｔと、該底板Ｔ上に立設され鉛直方向に延在するとともに同方向に延びる一対のレール700ｒを有する主梁700と、底板Ｔ上に配設され下記の燃料体106の下部106uを受ける燃料体受け皿701とを備えている。 << First Embodiment >>
<Configuration of Fuel Body Dimension Inspection Device S1>
FIG. 1 is a schematic perspective view of a fuel body size inspection device S1 according to the first embodiment of the present invention.
As shown in FIG. 1, the fuel body size inspection device S1 according to the first embodiment of the present invention includes a bottom plate T placed on a mounting surface G, and stands on the bottom plate T and extends in the vertical direction. A main beam 700 having a pair of rails 700r extending in the same direction and a fuel body tray 701 disposed on the bottom plate T and receiving a lower part 106u of the following fuel body 106 are provided.

なお、燃料体106は、図１の上面図である図２に示すように、内部に冷却水が流れる中空管のウォータロッド101が中央に配置され、ウォータロッド101の廻りには内部に核分裂性物質のＭＯＸペレットが収容された８×８本の燃料棒1OOが配設されており、また、この合計６０本の燃料棒1OOの振動を防止するために、図１に示すように、鉛直方向に所定間隔でスペーサ106sが設けられている。
すなわち、燃料体106は、8×8型燃料棒1OOと1本のウォータロッド101とを含む形状であり、例えば、長さ４〜５ｍ、横断面寸法１３ｃｍ×１３ｃｍを有している。 As shown in FIG. 2 which is a top view of FIG. 1, the fuel body 106 has a hollow water rod 101 in the center of which a cooling water flows. 8 × 8 fuel rods 1OO containing MOX pellets of active substances are arranged, and in order to prevent the vibration of the total 60 fuel rods 1OO, as shown in FIG. Spacers 106s are provided at predetermined intervals in the direction.
That is, the fuel body 106 has a shape including an 8 × 8 type fuel rod 1OO and one water rod 101, and has a length of 4 to 5 m and a cross-sectional dimension of 13 cm × 13 cm, for example.

なお、図２は、図１の燃料体寸法検査装置Ｓ１の要部を表す上面図である。
ここで、図１では、撮像機器300、前面照明400等を見易くするために図中左側に配置し、背面照明702を図中右側に配置した場合を図示しているが、図１以外の図２および図４〜図７では、撮像機器300、前面照明400等を図１とは反対側の図中右側に配置し、背面照明702を図中左側に配置した場合を示している。
なお、図１に示すように、撮像機器300、前面照明400等を左側に配置するとともに背面照明702を右側に配置してもよく、また、図２〜図７に示すように、撮像機器300、前面照明400等を右側に配置するとともに背面照明702を左側に配置してもよく、その配置は何れでもよい。 FIG. 2 is a top view showing a main part of the fuel body size inspection apparatus S1 of FIG.
Here, FIG. 1 shows a case where the imaging device 300, the front illumination 400, etc. are arranged on the left side in the drawing for easy viewing, and the back illumination 702 is arranged on the right side in the drawing. 2 and FIGS. 4 to 7 show a case where the imaging device 300, the front illumination 400, and the like are arranged on the right side in the drawing opposite to FIG. 1, and the back illumination 702 is arranged on the left side in the drawing.
As shown in FIG. 1, the imaging device 300, the front illumination 400, etc. may be arranged on the left side, and the back illumination 702 may be arranged on the right side. Also, as shown in FIGS. The front illumination 400 and the like may be arranged on the right side and the back illumination 702 may be arranged on the left side, and any arrangement may be used.

＜検査部Ｓ１ａの送り機構＞
図１に示す燃料体寸法検査装置Ｓ１において検査を担う主要部の検査部Ｓ１ａは、主梁700のレール700ｒに案内され、図１中のＺ方向の上下方向に動くことが可能であり、鉛直方向に装着される燃料体106の燃料棒100間の間隔ｓ(図２参照)を、その長手方向に移動し測定できる機構を有している。 <Feeding mechanism of inspection unit S1a>
1 is guided by the rail 700r of the main beam 700, and can move vertically in the Z direction in FIG. It has a mechanism capable of measuring the distance s (see FIG. 2) between the fuel rods 100 of the fuel body 106 mounted in the direction by moving in the longitudinal direction.

＜撮像機器300および前面照明400の送り機構＞
図１に示すように、燃料体寸法検査装置Ｓ１の主要部の検査部Ｓ１ａは、主梁700のレール700ｒに沿って案内され上下方向に移動するガイド部ｇを備えている。
このガイド部ｇの上には、スライドレール301が配設されており、該スライドレール301は、燃料棒100の間隔寸法ｓを(図２参照)撮像するテレセントリックカメラ等の撮像機器300およびその下方の前面照明400を図１の矢印α11、α12方向(Ｙ方向)に案内する。 <Feeding mechanism of imaging device 300 and front illumination 400>
As shown in FIG. 1, the main inspection unit S1a of the fuel body size inspection device S1 includes a guide unit g that is guided along the rail 700r of the main beam 700 and moves in the vertical direction.
A slide rail 301 is disposed on the guide portion g. The slide rail 301 has an imaging device 300 such as a telecentric camera that images the interval dimension s of the fuel rods 100 (see FIG. 2) and the lower part thereof. The front illumination 400 is guided in the directions of arrows α11 and α12 (Y direction) in FIG.

さらに、ガイド部ｇには、図２の撮像機器300近傍の拡大図の図３に示すように、撮像機器300および前面照明400を、スライドレール301に沿って移動するための送りモータ500が設けられており、送りモータ500のロッド500ｒが歯車501、502を介して、送りねじ503に接続されている。
この送りねじ503は、撮像機器300および前面照明400を案内するスライドレール301に並設され、一対のベアリング504を介してガイド部ｇ(図１参照)に取付けられ、回転できるよう構成されている。送りねじ503に螺合するナットには、撮像機器300および前面照明400が取付けられている。 Further, the guide portion g is provided with a feed motor 500 for moving the imaging device 300 and the front illumination 400 along the slide rail 301, as shown in FIG. 3 in an enlarged view near the imaging device 300 in FIG. The rod 500r of the feed motor 500 is connected to the feed screw 503 via gears 501,502.
The feed screw 503 is juxtaposed to the slide rail 301 for guiding the imaging device 300 and the front illumination 400, and is attached to a guide portion g (see FIG. 1) via a pair of bearings 504 so as to be rotatable. . The imaging device 300 and the front illumination 400 are attached to the nut that is screwed into the feed screw 503.

この構成により、送りねじ503が回転することで、ナットが、左右方向、すなわち、図１、図３の矢印α11、α12方向に動き、このナットに取付けた撮像機器300および前面照明400が、ガイド部ｇ上のスライドレール301に案内され、左右方向、すなわち、図１の矢印α11、α12方向に移動する。
こうして、撮像機器300および前面照明400は、横方向(図１のＹ方向、図１、図３の矢印α11、α12方向)に稼動され、燃料体106の短手方向に移動する機構となっている。 With this configuration, when the feed screw 503 rotates, the nut moves in the left-right direction, that is, in the directions of arrows α11 and α12 in FIGS. 1 and 3, and the imaging device 300 and the front illumination 400 attached to the nut are guided. Guided by the slide rail 301 on the part g, it moves in the left-right direction, that is, in the directions of arrows α11 and α12 in FIG.
Thus, the imaging device 300 and the front illumination 400 are operated in the lateral direction (the Y direction in FIG. 1 and the arrows α11 and α12 in FIGS. 1 and 3) and move in the short direction of the fuel body 106. Yes.

＜燃料体106の燃料棒1OOの固定機構＞
図１に示すように、主梁700のレール700ｒに沿って上下動するガイド部ｇには、主梁700から離隔する態様で延在する平板状の支持板ｇ1が固定されており、支持板ｇ1には、燃料体１０６が上下方向に挿通する開口ｇ1aを形成する一対の開口支持板ｇ11、ｇ12が形成されている。
このガイド部ｇの一対の開口支持板ｇ11、ｇ12には、それぞれ棒状の固定支持部材ｇ21、ｇ22の一方端(下端)が固定され鉛直方向に立設されており、固定支持部材ｇ21、ｇ22の他方端には、それぞれ固定用シリンダ204のシリンダチューブ204ｔが固定されている。 <Fixing mechanism of fuel rod 1OO of fuel body 106>
As shown in FIG. 1, a flat plate-like support plate g1 that extends away from the main beam 700 is fixed to a guide portion g that moves up and down along a rail 700r of the main beam 700. A pair of opening support plates g11 and g12 that form an opening g1a through which the fuel body 106 is inserted in the vertical direction is formed in g1.
One end (lower end) of a rod-like fixed support member g21, g22 is fixed to each of the pair of opening support plates g11, g12 of the guide portion g, and is erected in the vertical direction, and the fixed support members g21, g22 A cylinder tube 204t of the fixing cylinder 204 is fixed to the other end.

そして、固定用シリンダ204のシリンダロッド204ｒには、燃料棒100のたわみや回転を補正するための一対の固定板201が、ネジ止め等により固定されており、燃料体１０６の燃料棒100間の寸法を測定するに際し、一対の固定板201は、図２に示すように、固定用シリンダ204が伸張することにより燃料体106の燃料棒100を対向して押圧し(図２の矢印α21方向)、燃料棒100のたわみや回転を補正する。
この燃料体106の燃料棒100のたわみや回転を防止するための一対の固定板201と固定用シリンダ204とを燃料棒固定機構と呼称する。
燃料棒固定機構は、図１に示すＹ方向に、固定板201を固定用シリンダ204の動力を用いて移動させることが出来る。 A pair of fixing plates 201 for correcting deflection and rotation of the fuel rod 100 are fixed to the cylinder rod 204r of the fixing cylinder 204 by screwing or the like. When measuring the dimensions, as shown in FIG. 2, the pair of fixing plates 201 push the fuel rods 100 of the fuel body 106 opposite to each other as the fixing cylinder 204 extends (in the direction of arrow α21 in FIG. 2). Correct the deflection and rotation of the fuel rod 100.
The pair of fixing plates 201 and the fixing cylinder 204 for preventing the deflection and rotation of the fuel rod 100 of the fuel body 106 are referred to as a fuel rod fixing mechanism.
The fuel rod fixing mechanism can move the fixing plate 201 using the power of the fixing cylinder 204 in the Y direction shown in FIG.

燃料棒固定機構は、固定支持部材ｇ21、ｇ22に固定される一対の固定用シリンダ204のシリンダロッド204ｒを図２の矢印α21方向に、伸張させることにより、それぞれシリンダロッド204ｒに固定された一対の固定板201で燃料体106の燃料棒100を図２の矢印α21方向に押圧し挟み込み、燃料棒100間の寸法を測定するに際して、燃料棒100のたわみや回転を防止している。一方、燃料体106の燃料棒100間の寸法測定前、後は、一対の固定用シリンダ204のシリンダロッド204ｒが、図２の矢印α22方向に収縮し、一対の固定板201が、図２の矢印α22方向に、燃料体106の燃料棒100から離間するように移動する。
なお、燃料体106の燃料棒100のたわみや回転が発生しない場合には、燃料棒固定機構を設けることなく構成することが可能である。 The fuel rod fixing mechanism includes a pair of cylinder rods 204r fixed to the cylinder rods 204r by extending the cylinder rods 204r of the pair of fixing cylinders 204 fixed to the fixing support members g21 and g22 in the direction of arrow α21 in FIG. The fuel rod 100 of the fuel body 106 is pressed and sandwiched by the fixing plate 201 in the direction of the arrow α21 in FIG. 2 to prevent deflection and rotation of the fuel rod 100 when measuring the dimensions between the fuel rods 100. On the other hand, before and after the dimension measurement between the fuel rods 100 of the fuel body 106, the cylinder rod 204r of the pair of fixing cylinders 204 contracts in the direction of the arrow α22 in FIG. 2, and the pair of fixing plates 201 becomes in FIG. The fuel body 106 moves away from the fuel rod 100 in the direction of the arrow α22.
If the fuel rod 100 of the fuel body 106 does not bend or rotate, it can be configured without providing a fuel rod fixing mechanism.

＜反射板2OOａ、2OOｂ位置決め挿入機構＞
図１に示すように、ガイド部ｇの支持板ｇ1には、それぞれ棒状の位置決め用支持部材ｇ31、ｇ32の一方端(下端)が固定され鉛直方向に立設されており、位置決め用支持部材ｇ31、ｇ32の他方端には、それぞれ一対の位置決め用シリンダ206のシリンダチューブ206ｔが固定されている。
図２に示すように、一対の位置決め用シリンダ206のシリンダロッド206ｒには、それぞれ連結棒203ａ、203ｂが固定されている。 <Reflector 2OOa, 2OOb positioning insertion mechanism>
As shown in FIG. 1, one end (lower end) of each of rod-like positioning support members g31 and g32 is fixed to the support plate g1 of the guide portion g and is erected in the vertical direction. The cylinder tubes 206t of the pair of positioning cylinders 206 are fixed to the other ends of g32, respectively.
As shown in FIG. 2, connecting rods 203a and 203b are fixed to cylinder rods 206r of the pair of positioning cylinders 206, respectively.

これらの連結棒203ａ、203ｂの一方端部には、図２に示すように、それぞれ反射板回転モータ202が固定されており、連結棒203ａ、203ｂの他方端部には、それぞれ位置決めガイド205ａ、205ｂが固定されている。この一対の反射板回転モータ202のモータロッド202ｒには、それぞれ所定以上のトルクが加わるとスリップするスリップクラッチ2O7の一方側が固定されており、それぞれのスリップクラッチ2O7の他方側には反射板2OOａ、2OOｂが固定されている(図４参照)。なお、図４は、図２のＢ方向矢視図である。 As shown in FIG. 2, a reflecting plate rotating motor 202 is fixed to one end of each of the connecting rods 203a and 203b, and positioning guides 205a and 203b are respectively connected to the other ends of the connecting rods 203a and 203b. 205b is fixed. The motor rod 202r of the pair of reflecting plate rotating motors 202 is fixed to one side of a slip clutch 2O7 that slips when a torque exceeding a predetermined value is applied, and the other side of each slip clutch 2O7 has a reflecting plate 2OOa, 2OOb is fixed (see FIG. 4). 4 is a view in the direction of arrow B in FIG.

上記構成より、図２に示すように、位置決めガイド205ａと反射板2OOａまでの距離は、一定距離Ｌとできるが、図２に示すように、位置決めガイド205ａを燃料体106の最外部の燃料棒100に当接させて、反射板2OOａが、燃料体106のウォータロッド101および燃料棒100に当たることなく、ウォータロッド101、燃料棒100間に挿入できるように、Ｌを設定することで、反射板2OOａの位置決めを行っている。 2, the distance between the positioning guide 205a and the reflecting plate 2OOa can be a fixed distance L. As shown in FIG. 2, the positioning guide 205a is the outermost fuel rod of the fuel body 106. By setting L so that the reflector 2OOa can be inserted between the water rod 101 and the fuel rod 100 without being in contact with the water rod 101 and the fuel rod 100 of the fuel body 106, the reflector 2OOa is brought into contact with the fuel rod 106. 2OOa positioning is performed.

同様に、図２に示すように、位置決めガイド205ｂと反射板2OOｂまでの距離は、一定距離Ｌとできるが、図２に示すように、位置決めガイド205ｂを燃料体106の最外部の燃料棒100に当接させて、反射板2OOｂが、燃料体106のウォータロッド101および燃料棒100に当たることなく、ウォータロッド101、燃料棒100間に挿入できるように、Ｌを設定することで、反射板2OOｂの位置決めを行っている。 Similarly, as shown in FIG. 2, the distance between the positioning guide 205b and the reflecting plate 2OOb can be a constant distance L, but the positioning guide 205b is placed at the outermost fuel rod 100 of the fuel body 106 as shown in FIG. The reflector 2OOb is set to L so that the reflector 2OOb can be inserted between the water rod 101 and the fuel rod 100 without contacting the water rod 101 and the fuel rod 100 of the fuel body 106. Positioning is performed.

図２に示すように、上述の一対の位置決め用シリンダ206、該位置決め用シリンダ206によってそれぞれ移動される連結棒203ａ、203ｂ、該連結棒203ａ、203ｂの一方端側にそれぞれ固定される反射板回転モータ202、該一対の反射板回転モータ202にそれぞれスリップクラッチ2O7を介して接続される反射板2OOａ、2OOｂ、連結棒203ａ、203ｂの他方端側にそれぞれ固定される位置決めガイド205ａ、205ｂ等を反射板位置決め挿入機構と呼称する。
反射板位置決め挿入機構は、図１、図２に示すように、一対の位置決め用シリンダ206の動力を用いて、Ｘ方向に、それぞれ位置決めガイド205ａ、205ｂを前後させることができる。 As shown in FIG. 2, the pair of positioning cylinders 206, the connecting rods 203a and 203b moved by the positioning cylinder 206, respectively, and the reflecting plate rotation fixed to one end side of the connecting rods 203a and 203b, respectively. Reflects the motor 202, the reflecting plates 2OOa and 2OOb connected to the pair of reflecting plate rotation motors 202 through the slip clutch 2O7, and the positioning guides 205a and 205b fixed to the other end side of the connecting rods 203a and 203b, respectively. This is called a plate positioning / inserting mechanism.
As shown in FIGS. 1 and 2, the reflector positioning / inserting mechanism can move the positioning guides 205a and 205b back and forth in the X direction by using the power of the pair of positioning cylinders 206, respectively.

そして、図２に示すように、位置決めガイド205ａ、205ｂは、燃料体106における最外部の燃料棒1OOと接触することにより、Ｘ方向の位置を決める。位置決めガイド205ａ、205ｂに、それぞれ連結棒203ａ、203ｂを介して連結された反射板200ａ、2OOｂと、位置決めガイド205ａ、205ｂの燃料棒100と接触する部分との間の寸法は、前記したように、反射板200ａ、2OOｂをそれぞれウォータロッド101、燃料棒100間に接触することなく挿入できる一定距離Ｌに設定されている。 As shown in FIG. 2, the positioning guides 205 a and 205 b determine the position in the X direction by contacting the outermost fuel rod 1 OO in the fuel body 106. The dimensions between the reflectors 200a and 2OOb connected to the positioning guides 205a and 205b via the connecting rods 203a and 203b, respectively, and the portions of the positioning guides 205a and 205b that contact the fuel rod 100 are as described above. The reflectors 200a and 2OOb are set to a fixed distance L that can be inserted without contacting between the water rod 101 and the fuel rod 100, respectively.

そのため、図２に示すように、位置決めガイド205ａ、205ｂが、燃料体106における最外部の燃料棒1OOと接触し位置決めされた反射板200ａ、2OOｂは、図１、図４の状態から、反射板回転モータ202の駆動力により、図１の矢印α31方向に回動され、図２の二点鎖線、図５に示すように、ウォータロッド101、燃料棒100間に接触することなく挿入される。なお、図５は、燃料体106の燃料棒100間の間隔寸法を測定する際の概念的斜視図である。
ここで、反射板200ａ、2OOｂが、それぞれウォータロッド101、燃料棒100間の所定位置に挿入されたことは、それぞれ図示しない近接センサ等の位置センサで検出される。なお、反射板200ａ、2OOｂが、反射板200ａ、2OOｂが、挿入前の元の位置にあることは、それぞれ別の図示しない近接センサ等の位置センサで検出されている。 Therefore, as shown in FIG. 2, the reflecting plates 200a and 2OOb positioned by the positioning guides 205a and 205b contacting the outermost fuel rod 1OO in the fuel body 106 are changed from the state shown in FIGS. It is rotated in the direction of arrow α31 in FIG. 1 by the driving force of the rotary motor 202, and is inserted without contact between the water rod 101 and the fuel rod 100 as shown in the two-dot chain line in FIG. FIG. 5 is a conceptual perspective view when the distance between the fuel rods 100 of the fuel body 106 is measured.
Here, the fact that the reflectors 200a and 2OOb are inserted at predetermined positions between the water rod 101 and the fuel rod 100, respectively, is detected by a position sensor such as a proximity sensor (not shown). The fact that the reflecting plates 200a and 2OOb are in their original positions before insertion is detected by a position sensor such as a proximity sensor (not shown).

ここで、図２に示すように、一対の反射板回転モータ202のそれぞれのモータロッド202ｒと反射板2OOａ、2OOｂ間に、スリップクラッチ2O7を設けることにより、反射板2OOから燃料棒100、ウォータロッド101等に過大なトルクが加わることが防止される。
こうして、反射板200ａ、2OOｂが、燃料棒100、ウォータロッド101等に接触した場合は、反射板回転モータ202と反射板200ａ、2OOｂの間に取付けられたスリップクラッチ207により、所定の力を超える力が印加されると滑ることで、反射板200ａ、2OOｂが過度な力をもって燃料棒100、ウォータロッド101等に接触せず、燃料棒100、ウォータロッド101等の損傷が防止されている。 Here, as shown in FIG. 2, by providing a slip clutch 2O7 between the motor rod 202r of each of the pair of reflector rotating motors 202 and the reflectors 2OOa and 2OOb, the fuel rod 100 and the water rod are removed from the reflector 2OO. An excessive torque is prevented from being applied to 101 etc.
Thus, when the reflectors 200a, 2OOb come into contact with the fuel rod 100, the water rod 101, etc., a predetermined force is exceeded by the slip clutch 207 attached between the reflector rotating motor 202 and the reflectors 200a, 2OOb. When the force is applied, the reflectors 200a and 2OOb do not come into contact with the fuel rod 100, the water rod 101, etc. with an excessive force, and the fuel rod 100, the water rod 101, etc. are prevented from being damaged.

加えて、誤って、反射板200ａ、2OOｂと燃料棒1OO、ウォータロッド101等とが接触した場合、燃料棒1OO、ウォータロッド101等を損傷、損壊しないように、反射板200ａ、2OOｂを剛性の低い樹脂製としている。
反射板2OOａ、2OOｂは、例えば、ポリエチレンテレフタレート樹脂、ポリカーボネート樹脂等が用いられる。なお、反射板2OOａ、2OOｂは、燃料棒1OO、ウォータロッド101等を損傷させない構造ならば、樹脂以外の材料を用いてよい。
また、色としては、図５に示すように、前面照明400からの光を良好に反射できるように、反射率の高い色、例えば、黒以外の黄色、白色等が適用される。 In addition, if the reflectors 200a and 2OOb accidentally come into contact with the fuel rods 1OO and the water rod 101, the reflectors 200a and 2OOb are rigid so that the fuel rods 1OO and the water rod 101 etc. are not damaged or damaged. Made of low resin.
For the reflectors 2OOa and 2OOb, for example, polyethylene terephthalate resin, polycarbonate resin, or the like is used. The reflectors 2OOa and 2OOb may be made of a material other than resin as long as it does not damage the fuel rod 1OO, the water rod 101, and the like.
Further, as shown in FIG. 5, a color having a high reflectivity, for example, yellow other than black, white, or the like is applied so that the light from the front illumination 400 can be favorably reflected as shown in FIG.

このようにして、図１、図２に示すように、燃料体寸法検査装置Ｓ１は、燃料体106の燃料棒1OOのたわみや回転を防止する一対の固定板201、固定用シリンダ204等の燃料棒固定機構と、位置決めガイド205ａ、205ｂ、連結棒203ａ、203ｂ、反射板回転モータ202、スリップクラッチ2O7、反射板2OOａ、20Oｂ、シリンダ206等の反射板位置決め挿入機構とを、燃料体１０６の対向する両側面を挟みこむ同様な機構として、二台設けられている。 In this way, as shown in FIG. 1 and FIG. 2, the fuel body size inspection device S1 has a fuel such as a pair of fixing plates 201 and a fixing cylinder 204 that prevent the fuel rods 1OO of the fuel body 106 from bending and rotating. The rod fixing mechanism and the positioning guides 205a and 205b, the connecting rods 203a and 203b, the reflector rotating motor 202, the slip clutch 2O7, the reflectors 2OOa and 20Ob, the cylinder 206, etc. Two similar mechanisms are provided to sandwich both side surfaces.

ここで、図２の二点鎖線に示すように、燃料体106の側面から挿入される二つの反射板位置決め挿入機構の二つの反射板200ａ、200ｂは、長さを変え、また、互いに突き合わせる位置を前面照明400の光を受ける燃料棒100の裏側とすることにより、二つの反射板200ａ、200ｂの間から光が抜けることを避ける形状としている。 Here, as shown by a two-dot chain line in FIG. 2, the two reflectors 200 a and 200 b of the two reflector positioning and inserting mechanisms inserted from the side surfaces of the fuel body 106 have different lengths and abut each other. By setting the position to the back side of the fuel rod 100 that receives the light from the front illumination 400, the light is prevented from passing through between the two reflectors 200a and 200b.

本実施形態では、反射板をウォータロッド101、燃料棒100間に挿入する際に燃料体106の燃料棒100を保持するスペーサ106ｓに当接しないように、特に、反射板およびその挿入機構が、燃料棒100の上部100oの上部タイプレート(図示せず)と燃料棒100の最上部のスペーサ106ｓに当接しないように、１枚の反射板でなく２枚の反射板2OOａ、20Oｂとして、その長さを短く形成している。
しかし、このような寸法的な制約がない場合には、本実施形態と異なり、１枚の反射板で構成してもよい。 In the present embodiment, in particular, the reflector and its insertion mechanism are arranged so as not to come into contact with the spacer 106s that holds the fuel rod 100 of the fuel body 106 when the reflector is inserted between the water rod 101 and the fuel rod 100. In order not to come into contact with the upper tie plate (not shown) of the upper part 100o of the fuel rod 100 and the spacer 106s at the uppermost part of the fuel rod 100, two reflectors 2OOa and 20Ob are used instead of one reflector. The length is short.
However, when there is no such dimensional restriction, unlike the present embodiment, it may be constituted by a single reflector.

＜背面照明702の配置＞
さらに、燃料体寸法検査装置Ｓ１は、図１に示すように、主梁700のレール700ｒに沿って上下方向に案内されるガイド部ｇの一対の開口支持板ｇ11、ｇ12先端部に、照明用支持板ｇ4が、燃料体106が挿通する開口ｇ1aを形成する態様で設けられている。この照明用支持板ｇ4には、背面照明702が燃料体106の燃料棒100を照明するように立設されている。 <Arrangement of backlight 702>
Further, as shown in FIG. 1, the fuel body size inspection device S1 is provided with an illumination for the tip of the pair of opening support plates g11 and g12 of the guide portion g guided in the vertical direction along the rail 700r of the main beam 700. The support plate g4 is provided in a form that forms an opening g1a through which the fuel body 106 is inserted. On this illumination support plate g4, a rear illumination 702 is erected so as to illuminate the fuel rod 100 of the fuel body 106.

背面照明702は、図１、図２に示すように、燃料体106の燃料棒100の短手方向の寸法より充分大きな寸法を有しているとともに、図１、図４に示すように、燃料体１０６の燃料棒100の長手方向も充分大きな寸法を有している。また、背面照明702は、図１、図４に示すように、その中心部の燃料体106の燃料棒100を間に挟み、撮像機器300が対向する態様で設けられ、その光を燃料棒100間の空間を介して撮像機器300で撮像するのに支障がないように構成されている。
なお、前記構成の燃料体寸法検査装置Ｓ１は、例えば、図示しないマイクロコンピュータ、周辺回路等の制御手段により統括的に制御され、燃料体106の燃料棒100の間の間隔寸法の測定処理も、この制御手段の制御により行なわれる。 As shown in FIGS. 1 and 2, the backlight 702 has a dimension sufficiently larger than the dimension in the short direction of the fuel rod 100 of the fuel body 106, and as shown in FIGS. The longitudinal direction of the fuel rod 100 of the body 106 also has a sufficiently large dimension. As shown in FIGS. 1 and 4, the back light 702 is provided in such a manner that the fuel rod 100 of the fuel body 106 at the center portion is sandwiched therebetween and the imaging device 300 is opposed, and the light is supplied to the fuel rod 100. The imaging device 300 is configured so as not to interfere with the space between them.
Note that the fuel body size inspection device S1 having the above-described configuration is comprehensively controlled by, for example, a control unit such as a microcomputer (not shown) or a peripheral circuit, and a process for measuring the distance between the fuel rods 100 of the fuel body 106 is also performed. This is performed under the control of this control means.

＜燃料体106の燃料棒100間の間隔寸法検査方法＞
次に、燃料体寸法検査装置Ｓ１による燃料体106の燃料棒100間の間隔寸法検査方法について、説明する。なお、以下の制御は、上記制御手段により行われる。
＜背面照明702を用いての燃料棒1OO間の間隔寸法検査方法＞
まず、前面照明400および反射板2OOａ、2OOｂを使用することなく、背面照明702を用いての燃料棒1OO間の間隔寸法検査方法を説明する。
図１に示すように、燃料体106の下部106ｕを、燃料体寸法検査装置Ｓ１の底板Ｔ上の燃料体受け皿701に載置するとともに、燃料体106の上部100oを燃料棒ホルダ(図示せず)で保持し、図１に示すように、燃料体106を燃料体寸法検査装置Ｓ１に装着する。 <Inspection Dimension Inspection Method Between Fuel Rods 100 of Fuel Body 106>
Next, a method for inspecting the distance between the fuel rods 100 of the fuel body 106 by the fuel body dimension inspection apparatus S1 will be described. The following control is performed by the control means.
<Inspection method for distance between fuel rods 1OO using the back light 702>
First, a method for inspecting the distance between the fuel rods 1OO using the back light 702 without using the front light 400 and the reflectors 2OOa and 2OOb will be described.
As shown in FIG. 1, the lower part 106u of the fuel body 106 is placed on a fuel body tray 701 on the bottom plate T of the fuel body size inspection apparatus S1, and the upper part 100o of the fuel body 106 is placed on a fuel rod holder (not shown). ), And as shown in FIG. 1, the fuel body 106 is attached to the fuel body size inspection apparatus S1.

続いて、図２に示すように、燃料棒固定機構の一対の固定用シリンダ204を伸張し、それぞれのシリンダロッド204ｒに固定された固定板201で燃料体106の燃料棒100を図２の矢印α21方向に押圧することにより、燃料体106を固定し、燃料体106の燃料棒100のたわみや回転を補正する。固定後、背面照明702で、図２、図４の白抜き矢印γ１のように、燃料体106の燃料棒100を照らす。
一方、撮像機器300は、例えば、図３に示す送りモータ500の駆動力により、送りねじ503(図１参照)が回転され、燃料体106の短手方向の一番端の燃料棒1OO間隔を測定する位置に配置されている。 Subsequently, as shown in FIG. 2, the pair of fixing cylinders 204 of the fuel rod fixing mechanism are extended, and the fuel rod 100 of the fuel body 106 is moved to the arrow of FIG. 2 by the fixing plate 201 fixed to each cylinder rod 204r. By pressing in the α21 direction, the fuel body 106 is fixed, and the deflection and rotation of the fuel rod 100 of the fuel body 106 are corrected. After fixing, the fuel rod 100 of the fuel body 106 is illuminated with the back light 702 as indicated by the white arrow γ1 in FIGS.
On the other hand, in the imaging device 300, for example, the feed screw 503 (see FIG. 1) is rotated by the driving force of the feed motor 500 shown in FIG. It is arranged at the position to measure.

背面照明702の光は、図１、図２に示すように、燃料棒1OOの間の空間を透過して撮像機器300に入る。撮像機器300で把えた画像は、図５に示すモニタ302にあるように、燃料棒1OOの間の光が透過する部分は白くなり、燃料棒1OOは黒い部分として撮像される。
従って、モニタ302の画像の白い部分の幅を測定することにより、燃料棒1OO間の間隔寸法ｓを求めることができる。
ここで、寸法測定方法は、予め、モニタ302(図５参照)の一画素分の寸法を測っておき、燃料棒1OOの間隔を、モニタ302の把えた画像の白い部分の幅の画素数から計算することにより、燃料棒1OO間の間隔寸法ｓとする。 As shown in FIGS. 1 and 2, the light from the back illumination 702 passes through the space between the fuel rods 1 OO and enters the imaging device 300. As shown in the monitor 302 shown in FIG. 5, in the image captured by the imaging device 300, the portion where the light between the fuel rods 10 O transmits is white, and the fuel rod 10 O is captured as a black portion.
Therefore, by measuring the width of the white portion of the image of the monitor 302, the distance dimension s between the fuel rods 1OO can be obtained.
Here, in the dimension measuring method, the size of one pixel of the monitor 302 (see FIG. 5) is measured in advance, and the interval between the fuel rods 1OO is determined from the number of pixels of the width of the white portion of the image grasped by the monitor 302. By calculating, the distance dimension s between the fuel rods 1OO is obtained.

寸法測定後、図３に示すように、送りモータ500が駆動し、歯車501、502を介して送りねじ503が回転し、送りねじ503に螺合するナットに取り付けられた撮像機器300が、スライドレール301に案内され、図１、図２、図３の矢印α11方向または矢印α12方向に移動する。
このように、撮像機器300の位置を燃料体106の短手方向に変え、燃料体106の短手方向の燃料棒1OO間の間隔寸法を測定できる。
一方、燃料体106の長手方向の異なる箇所の燃料棒1OOの間隔寸法を測定する場合には、図１に示すように、撮像機器300、背面照明702等を支持するガイド部ｇを、主梁７００のレール７００ｒに沿って、矢印β11、β12方向に移動することにより、燃料体106の長手方向上部の燃料棒1OOの間隔寸法を測定できる。 After the dimension measurement, as shown in FIG. 3, the feed motor 500 is driven, the feed screw 503 is rotated through the gears 501 and 502, and the imaging device 300 attached to the nut screwed to the feed screw 503 is slid It is guided by the rail 301 and moves in the direction of arrow α11 or arrow α12 in FIGS.
In this way, the position of the imaging device 300 is changed in the short direction of the fuel body 106, and the distance between the fuel rods 1OO in the short direction of the fuel body 106 can be measured.
On the other hand, when measuring the distance between the fuel rods 1OO at different locations in the longitudinal direction of the fuel body 106, as shown in FIG. 1, a guide portion g that supports the imaging device 300, the back light 702, etc. By moving in the directions of arrows β11 and β12 along the rail 700r of 700, the distance between the fuel rods 1OO at the upper part in the longitudinal direction of the fuel body 106 can be measured.

一方、燃料体106の長手方向下部の燃料棒1OOの間隔寸法を測定する場合には、撮像機器300、背面照明702等を支持するガイド部ｇを、主梁700のレール700ｒに沿って、矢印β12方向に移動することにより、燃料体106の長手方向下部の燃料棒1OOの間隔寸法を測定することができる。
こうして、撮像機器300を燃料体106の端から順に動かすことにより燃料棒1OOの間隔を測定し、ウォータロッド101前の燃料棒1OOの間隔を測定することになる。
なお、背面照明702の光を用いる燃料棒1OOの間隔寸法検査は、燃料体106におけるウォータロッド101が配置されていない端部側では、ウォータロッド101表面の光の拡散の影響が少ないため、有効である。 On the other hand, when measuring the distance between the fuel rods 1OO at the lower portion of the fuel body 106 in the longitudinal direction, the guide portion g supporting the imaging device 300, the back light 702, etc. is moved along the rail 700r of the main beam 700 with an arrow. By moving in the β12 direction, the interval dimension of the fuel rods 1OO at the lower part in the longitudinal direction of the fuel body 106 can be measured.
Thus, the distance between the fuel rods 1OO is measured by moving the imaging device 300 sequentially from the end of the fuel body 106, and the distance between the fuel rods 1OO before the water rod 101 is measured.
Note that the fuel rod 1OO interval inspection using the light from the back light 702 is effective because the influence of light diffusion on the surface of the water rod 101 is small on the end of the fuel body 106 where the water rod 101 is not disposed. It is.

＜前面照明400及び反射板2OOａ、2OOｂを用いての燃料棒1OOの間隔寸法の検査方法＞
次に、背面照明702を使用することなく、前面照明400および反射板2OOａ、2OOｂを使用しての燃料体106の燃料棒1OO間の間隔寸法の検査方法について説明する。
まず、背面照明702を消灯し、図２の二点鎖線、図５に示すように、燃料棒1OOとウォータロッド101間に反射板200ａ、2OOｂが挿入された後、前面照明400から光を発し、反射板200ａ、2OOｂで反射させて燃料棒1OOの間の空間を通った反射光を撮像機器300で把え、制御手段により撮像機器300で把えた画像を処理し測定が行われる。 <Inspection method of the distance between fuel rods 1OO using the front light 400 and the reflectors 2OOa and 2OOb>
Next, a method for inspecting the distance between the fuel rods 1OO of the fuel body 106 using the front illumination 400 and the reflectors 2OOa and 2OOb without using the back illumination 702 will be described.
First, the backlight 702 is turned off, and the reflectors 200a and 2OOb are inserted between the fuel rod 1OO and the water rod 101 as shown in FIG. The reflected light reflected by the reflectors 200a and 2OOb and passed through the space between the fuel rods 1OO is grasped by the imaging device 300, and the image grasped by the imaging device 300 is processed and measured by the control means.

すなわち、図２に示すように、反射板位置決め挿入機構における一対の位置決め用シリンダ206を稼動し、位置決めガイド205ａ、205ｂを燃料体106の最外部の燃料棒１００に当接させ、反射板2OOａ、2OOｂが燃料棒100に当たることなく燃料棒100、ウォータロッド101の間に挿入できる位置に位置決めし、反射板2OOａ、2OOｂを、反射板回転モータ202の駆動力により図１の矢印α31方向に回動し、図２中の二点鎖線、図５で示すように、ウォータロッド101前面と燃料棒1OOの間に挿入する。なお、反射板200ａ、2OOｂが、それぞれウォータロッド101、燃料棒100間の所定位置に挿入されたことは、それぞれ図示しない近接センサ等の位置センサで検出される。 That is, as shown in FIG. 2, the pair of positioning cylinders 206 in the reflecting plate positioning and insertion mechanism are operated, the positioning guides 205a and 205b are brought into contact with the outermost fuel rod 100 of the fuel body 106, and the reflecting plates 2OOa, The 2OOb is positioned so that it can be inserted between the fuel rod 100 and the water rod 101 without hitting the fuel rod 100, and the reflectors 2OOa and 2OOb are rotated in the direction of arrow α31 in FIG. 2 and inserted between the front surface of the water rod 101 and the fuel rod 1OO as shown in FIG. The fact that the reflectors 200a and 2OOb are inserted at predetermined positions between the water rod 101 and the fuel rod 100, respectively, is detected by a position sensor such as a proximity sensor (not shown).

続いて、図５で示すように、前面照明400を点灯する。すると、前面照明400の光は、ウォータロッド101前面、すなわち、反射板2OOａ、2OOｂに対して反ウォータロッド101側に配置された燃料棒100間を通り反射板200ａ、2OOｂにより反射され、再び、反ウォータロッド101側、すなわち反射板200ａ、2OOｂと撮像機器300間の燃料棒1OOの間の空間を通り、撮像機器300により反射光が把えられ、図５に示す撮像機器300のモニタ302のように撮像される。
図５に示すモニタ302の画像の黒い箇所が燃料棒1OOであり、白い箇所が燃料棒1OO間のスペースであり、前記のように、予め、モニタ302の一画素分の寸法を測っておき、そのデータを予め制御手段に格納しておき、制御手段における燃料棒1OOの間隔をモニタ302で把えた画像の白い部分の幅の画素数から計算する処理によって、燃料棒1OO間の間隔寸法を測定する。 Subsequently, as shown in FIG. 5, the front illumination 400 is turned on. Then, the light of the front illumination 400 is reflected by the reflectors 200a and 2OOb through the fuel rods 100 arranged on the front side of the water rod 101, that is, on the anti-water rod 101 side with respect to the reflectors 2OOa and 2OOb. The reflected light is captured by the imaging device 300 through the anti-water rod 101 side, that is, the space between the reflectors 200a, 2OOb and the fuel rod 1OO between the imaging device 300, and the monitor 302 of the imaging device 300 shown in FIG. As shown in FIG.
The black portion of the image of the monitor 302 shown in FIG. 5 is the fuel rod 1OO, and the white portion is the space between the fuel rods 1OO. As described above, the size of one pixel of the monitor 302 is measured in advance, The data is stored in the control means in advance, and the distance between the fuel rods 1OO is measured by calculating the distance between the fuel rods 1OO in the control means from the number of pixels in the width of the white part of the image captured by the monitor 302. To do.

燃料棒1OOの間隔測定後、図３に示す送りモータ500を駆動し、送りねじ503を介して、撮像機器300を、図１、図３、図５のα11方向、α12方向に移動して、同様な方法で、燃料体106の短手方向の異なる箇所の燃料棒1OOの間隔寸法を、制御手段等を用いて測定する。
一方、燃料体106の長手方向の異なる箇所の燃料棒1OOの間隔寸法を測定する場合には、図１に示すように、撮像機器300、背面照明702等を支持するガイド部ｇを、主梁700のレール700ｒに沿って、矢印β11、β12方向に移動することにより、燃料体106の長手方向の異なる箇所の燃料棒1OOの間隔寸法を、同様な方法で測定できる。
前面照明400および反射板2OOａ、2OOｂを使用した測定を終了し、背面照明702を使用する測定に移行する場合には、前面照明400を消灯するとともに、挿入された反射板200ａ、2OOｂを、図２に示す反射板回転モータ202を逆回転させることにより、元の状態に戻す。
なお、反射板2OOａ、2OOｂが、それぞれ元の状態に戻ったことは、それぞれ図示しない近接センサ等の位置センサで検出される。 After measuring the distance between the fuel rods 1OO, the feed motor 500 shown in FIG. 3 is driven, and the imaging device 300 is moved in the α11 direction and the α12 direction in FIGS. In the same way, the distance between the fuel rods 1OO at different locations in the short direction of the fuel body 106 is measured using control means or the like.
On the other hand, when measuring the distance between the fuel rods 1OO at different locations in the longitudinal direction of the fuel body 106, as shown in FIG. 1, a guide portion g that supports the imaging device 300, the back light 702, etc. By moving in the directions of arrows β11 and β12 along the rail 700r of 700, the distance between the fuel rods 1OO at different locations in the longitudinal direction of the fuel body 106 can be measured by the same method.
When the measurement using the front illumination 400 and the reflectors 2OOa and 2OOb is completed and the measurement is shifted to the measurement using the rear illumination 702, the front illumination 400 is turned off and the inserted reflectors 200a and 2OOb are shown in FIG. The reflecting plate rotating motor 202 shown in 2 is reversely rotated to restore the original state.
The return of the reflecting plates 2OOa and 2OOb to their original states is detected by a position sensor such as a proximity sensor (not shown).

その後、背面照明702を、図２の白抜き矢印γ１に示すように、点灯させる。その後、前記したように、他の燃料棒1OO間の間隔寸法を測定する。
上記構成によれば、反射板2OOａ、2OOｂをウォータロッド101前面と燃料棒1OOの間に挿入し、前面照明400の光を反射板2OOａ、2OOｂに反射させることにより、前面照明400の光がウォータロッド101表面に当たらない。そのため、前面照明400の光がウォータロッド101表面で拡散することなく反射できるために照度は低下しない。そのため、燃料棒1OO間の間隔寸法を精度良く測定できる。
なお、上記第１実施形態では、前面照明400および反射板2OOａ、2OOｂを使用すことなく、背面照明702を使用する測定も説明したが、全ての燃料棒1OOの間の間隔寸法の測定を、背面照明702を使用することなく、前面照明400および反射板2OOａ、2OOｂを使用して行ってもよい。 Thereafter, the backlight 702 is turned on as shown by the white arrow γ1 in FIG. Thereafter, as described above, the distance between the other fuel rods 1OO is measured.
According to the above configuration, the reflectors 2OOa and 2OOb are inserted between the front surface of the water rod 101 and the fuel rod 1OO, and the light of the front illumination 400 is reflected to the reflectors 2OOa and 2OOb, so that the light of the front illumination 400 is reflected in the water. It does not hit the surface of the rod 101. For this reason, the light of the front illumination 400 can be reflected without diffusing on the surface of the water rod 101, so the illuminance does not decrease. Therefore, the distance between the fuel rods 1OO can be accurately measured.
In the first embodiment, the measurement using the back light 702 without using the front light 400 and the reflectors 2OOa and 2OOb has been described. However, the measurement of the distance dimension between all the fuel rods 1OO is performed. Instead of using the back light 702, the front light 400 and the reflectors 2OOa and 2OOb may be used.

＜＜第２実施形態＞＞
次に、第２実施形態の燃料体寸法検査装置Ｓ２について、図６を用いて説明する。なお、図６は、第２実施形態の燃料体寸法検査装置Ｓ２の上面図である。
図２に示す第１実施形態の燃料体寸法検査装置Ｓ１においては、長さが異なる反射板200ａ、2OOｂをそれぞれ有する二つの反射板位置決め挿入機構を用いる場合を説明したが、図６に示す第２実施形態の燃料体寸法検査装置Ｓ２は、何れか一方の一つの反射板位置決め挿入機構を使用するものである。 << Second Embodiment >>
Next, the fuel body size inspection device S2 of the second embodiment will be described with reference to FIG. FIG. 6 is a top view of the fuel body size inspection device S2 of the second embodiment.
In the fuel dimensional inspection apparatus S1 of the first embodiment shown in FIG. 2, the case where the two reflector positioning / inserting mechanisms having the reflectors 200a and 2OOb having different lengths is used has been described. The fuel body size inspection device S2 of the second embodiment uses any one of the reflector positioning / inserting mechanisms.

なお、固定板201、シリンダ204を有する燃料棒固定機構は、燃料体106を対向する両側面より押圧して固定する必要があるため、第１実施形態(図２参照)と同様、二台設置している。
図６に示すように、第２実施形態の燃料体寸法検査装置Ｓ２は、反射板200ｃの長さを長<することにより、ウォータロッド101前面の燃料棒100の間隔寸法を、一つの反射板200ｃを用いて測定する構成である。
これ以外の構成は、第１実施形態と同様であるから、詳細な説明は省略する。 Since the fuel rod fixing mechanism having the fixing plate 201 and the cylinder 204 needs to be pressed and fixed from the opposite side surfaces, two units are installed as in the first embodiment (see FIG. 2). is doing.
As shown in FIG. 6, the fuel body size inspection device S2 of the second embodiment increases the length of the reflector 200c so that the distance between the fuel rods 100 on the front surface of the water rod 101 is reduced to one reflector. It is the structure which measures using 200c.
Since the configuration other than this is the same as that of the first embodiment, detailed description thereof is omitted.

＜＜第３実施形態＞＞
次に、第３実施形態の燃料体寸法検査装置Ｓ３について、図７を用いて説明する。なお、図７は、第３実施形態の燃料体寸法検査装置Ｓ３の上面図である。
第３実施形態の燃料体寸法検査装置Ｓ３は、図２に示す第１実施形態の燃料体寸法検査装置Ｓ２の反射板2OOａ、2OOｂを、図７に示すように、自ら発光する発光板6OOａ、6OOｂで構成し、図２の第１実施形態の前面照明400を取り除いて構成したものである。 << Third Embodiment >>
Next, the fuel body size inspection device S3 of the third embodiment will be described with reference to FIG. FIG. 7 is a top view of the fuel body size inspection device S3 of the third embodiment.
The fuel body size inspection device S3 of the third embodiment is configured such that the reflectors 2OOa and 2OOb of the fuel body size inspection device S2 of the first embodiment shown in FIG. It is configured by 6OOb, and is configured by removing the front illumination 400 of the first embodiment of FIG.

図２の反射板2OOａ、2OOｂからの反射光を、発光板6OOａ、6OOｂで発光する光に代替して照らす以外は、第１実施形態と同様であり、発光板6OOａ、6OOｂより発せられる光を、第１実施形態の反射板2OOａ、2OOｂによる反射光と同様に撮像機器300で撮像して、燃料棒100の間隔を測定する。
ここで、発光板6OOａ、6OOｂとしては、電圧をかけることで材料自身が発光する有機ＥＬ(Ｅlectro Ｌuminescence)等で構成する。 The light emitted from the light emitting plates 6OOa and 6OOb is the same as in the first embodiment except that the reflected light from the reflecting plates 2OOa and 2OOb in FIG. 2 is illuminated instead of the light emitted from the light emitting plates 6OOa and 6OOb. The distance between the fuel rods 100 is measured by imaging with the imaging device 300 in the same manner as the reflected light from the reflectors 2OOa and 2OOb of the first embodiment.
Here, the light emitting plates 6OOa and 6OOb are composed of organic EL (Electro Luminescence) or the like that emits light by applying a voltage.

なお、発光板6OOａ、6OOｂは、光を発しウォータロッド101と燃料棒100との間に挿入できる寸法を有するものであれば、有機ＥＬに限定されず如何なる構成でもよい。
また、発光板は、第２実施形態のように、一つの構成としてもよい。
上記以外の構成は、第１実施形態と同様であるから、詳細な説明は省略する。
上記構成によれば、発光板6OOａ、6OOｂをウォータロッド101前面と燃料棒1OOの間に挿入するので、発光板6OOａ、6OOｂの光がウォータロッド101表面に当たらない。そのため、発光板6OOａ、6OOｂの光がウォータロッド101表面で拡散せず、発光板6OOａ、6OOｂから発せられた光を撮像機器300で直接捉えるので、照度は低下しない。そのため、燃料棒1OO間の間隔寸法を精度良く測定できる。 The light emitting plates 6OOa and 6OOb are not limited to the organic EL and may have any configuration as long as they emit light and have a size that can be inserted between the water rod 101 and the fuel rod 100.
Further, the light emitting plate may have a single configuration as in the second embodiment.
Since the configuration other than the above is the same as that of the first embodiment, a detailed description thereof will be omitted.
According to the above configuration, since the light emitting plates 6OOa and 6OOb are inserted between the front surface of the water rod 101 and the fuel rod 1OO, the light from the light emitting plates 6OOa and 6OOb does not strike the surface of the water rod 101. Therefore, the light from the light emitting plates 6OOa and 6OOb is not diffused on the surface of the water rod 101, and the light emitted from the light emitting plates 6OOa and 6OOb is directly captured by the imaging device 300, so that the illuminance does not decrease. Therefore, the distance between the fuel rods 1OO can be accurately measured.

なお、第１から第３実施形態においては、反射板2OOａ、2OOｂ、2OOｃおよび発光板6OOａ、6OOｂを回転させて、ウォータロッド101と燃料棒100との間に挿入する場合を説明したが、反射板2OOａ、2OOｂ、2OOｃおよび発光板6OOａ、6OOｂを直線運動で移動させてもよく、反射板2OOａ、2OOｂ、2OOｃおよび発光板6OOａ、6OOｂをウォータロッド101と燃料棒100との間に挿入する方法は、特に限定されるものではない。 In the first to third embodiments, the case where the reflecting plates 2OOa, 2OOb, 2OOc and the light emitting plates 6OOa, 6OOb are rotated and inserted between the water rod 101 and the fuel rod 100 has been described. The plates 2OOa, 2OOb, 2OOc and the light emitting plates 6OOa, 6OOb may be moved in a linear motion, and the reflectors 2OOa, 2OOb, 2OOc and the light emitting plates 6OOa, 6OOb are inserted between the water rod 101 and the fuel rod 100. Is not particularly limited.

第１実施形態の燃料体寸法検査装置の概略斜視図である。It is a schematic perspective view of the fuel body size inspection apparatus of 1st Embodiment. 図１の燃料体寸法検査装置の要部を表す上面図である。It is a top view showing the principal part of the fuel body dimension inspection apparatus of FIG. 図２の撮像機器近傍の拡大図である。FIG. 3 is an enlarged view of the vicinity of the imaging device in FIG. 2. 図２のＢ方向矢視図である。It is a B direction arrow line view of FIG. 燃料体の燃料棒間の間隔寸法を測定する際の概念的斜視図である。It is a conceptual perspective view at the time of measuring the distance dimension between the fuel rods of a fuel body. 第２実施形態の燃料体寸法検査装置の上面図である。It is a top view of the fuel body size inspection apparatus of 2nd Embodiment. 第３実施形態の燃料体寸法検査装置Ｓ３の上面図である。It is a top view of fuel body size inspection apparatus S3 of 3rd Embodiment.

Explanation of symbols

１００燃料棒
１０１ウォータロッド
１０６燃料体
２００ａ、２００ｂ、２００ｃ反射板
２０１固定板(燃料棒固定手段、固定部材)
２０２反射板回転モータ(反射板位置決め挿入手段、反射板移動手段、発光位置決め挿入手段、発光移動手段)
２０３ａ、２０３ｂ連結棒(反射板位置決め挿入手段、発光位置決め挿入手段)
２０４固定用シリンダ(燃料棒固定手段、固定部材移動手段)
２０５ａ、２０５ｂ位置決めガイド(反射板位置決め挿入手段、位置決めガイド部材、発光位置決め挿入手段)
２０６位置決め用シリンダ (反射板位置決め挿入手段、測定位置決め手段、発光位置決め挿入手段)
２０７スリップクラッチ(反射板位置決め挿入手段、クラッチ手段、発光位置決め挿入手段)
３００撮像機器(撮像手段)
３０２モニタ(測定手段)
４００前面照明(照明手段)
６００ａ、６００ｂ発光手段
Ｓ１、Ｓ２、Ｓ３燃料体寸法検査装置 DESCRIPTION OF SYMBOLS 100 Fuel rod 101 Water rod 106 Fuel body 200a, 200b, 200c Reflector 201 Fixing plate (Fuel rod fixing means, fixing member)
202 Reflector rotating motor (reflector positioning insertion means, reflector moving means, light emission positioning insertion means, light emission moving means)
203a, 203b Connecting rod (reflecting plate positioning insertion means, light emission positioning insertion means)
204 Cylinder for fixing (Fuel rod fixing means, fixing member moving means)
205a, 205b Positioning guide (reflecting plate positioning insertion means, positioning guide member, light emission positioning insertion means)
206 Positioning cylinder (Reflector positioning insertion means, measurement positioning means, light emission positioning insertion means)
207 slip clutch (reflecting plate positioning insertion means, clutch means, light emission positioning insertion means)
300 Imaging equipment (imaging means)
302 Monitor (Measuring means)
400 Front lighting (lighting means)
600a, 600b Light emitting means S1, S2, S3 Fuel body size inspection device

Claims

A fuel body size inspection method for measuring a distance between the fuel rods in a fuel body including a water rod and a fuel rod disposed so as to surround the water rod,
A reflection plate is inserted between the water rod and the fuel rod, and the light emitted from the illumination means disposed on the side opposite to the water rod with respect to the inserted reflection plate is reflected by the inserted reflection plate; Transmitting between the fuel rods arranged on the anti-water rod side, imaging the transmitted light by the imaging means arranged on the anti-water rod side, and transmitting between the fuel rods from the image taken by the imaging unit A fuel body size inspection method, comprising: measuring a distance between the fuel rods on the anti-water rod side by measuring a width of light to be measured.

A fuel body size inspection method for measuring a distance dimension between the fuel rods in a fuel body including a water rod and a fuel rod disposed so as to surround the water rod,
Correcting the deflection and rotation of the fuel rod of the fuel body;
A reflector positioning insertion step for inserting a reflector between the water rod and the fuel rod;
The light emitted from the illumination means arranged on the anti-water rod side with respect to the inserted reflector is reflected by the reflector, and the reflected light is transmitted between the fuel rods arranged on the anti-water rod side. A process of
Imaging the transmitted light by imaging means disposed on the side opposite to the water rod with respect to the inserted reflector;
Measuring the dimension between the fuel rods on the anti-water rod side by measuring the width of light transmitted between the fuel rods from the image captured by the imaging means. Fuel body dimension inspection method.

The fuel body size inspection method according to claim 2,
The reflecting plate positioning and inserting step is provided apart from the reflecting plate by a predetermined distance that allows the reflecting plate to be inserted in a non-contact manner between the water rod and the fuel rod when contacting the outermost fuel rod of the fuel body. The positioning guide member and the reflecting plate are moved until the positioning guide member comes into contact with the outermost fuel rod of the fuel body, the reflecting plate is positioned, and the reflecting plate has a transmission force of a predetermined value or less. A fuel rod assembly size inspection method comprising: inserting between the water rod and the fuel rod through a clutch means for transmitting and transmitting a transmission force exceeding the predetermined value.

A fuel body size inspection method for measuring a dimension between fuel rods in a fuel body including a water rod and a fuel rod disposed so as to surround the water rod,
A light emitting means is inserted between the water rod and the fuel rod, the light emitted from the inserted light emitting means is transmitted between the fuel rods, and the transmitted light is on the side opposite to the water rod with respect to the light emitting means. The distance between the fuel rods on the anti-water rod side is measured by measuring the width of light transmitted between the fuel rods from the image captured by the image capturing unit disposed. A fuel body size inspection method.

A fuel body size inspection method for measuring a distance dimension between the fuel rods in a fuel body including a water rod and a fuel rod disposed so as to surround the water rod,
Correcting the deflection and rotation of the fuel rod of the fuel body;
A light emitting means positioning insertion step for inserting light emitting means between the water rod and the fuel rod;
Transmitting light emitted from the light emitting means between fuel rods disposed on the side opposite to the water rod with respect to the light emitting means;
Imaging the transmitted light by imaging means arranged on the anti-water rod side;
Measuring the distance between the fuel rods on the anti-water rod side by measuring the width of the light transmitted between the fuel rods from the image picked up by the image pickup means. Fuel body dimension inspection method.

In the fuel body size inspection method according to claim 5,
The light emitting means positioning and inserting step is provided apart from the light emitting means by a predetermined distance that allows the light emitting means to be inserted in a non-contact manner between the water rod and the fuel rod when contacting the outermost fuel rod of the fuel body. The positioning guide member and the light emitting means are moved until the positioning guide member comes into contact with the outermost fuel rod of the fuel body, the reflecting plate is positioned, and the light emitting means has a transmission force of a predetermined value or less. A fuel rod assembly size inspection method comprising: inserting between the water rod and the fuel rod through a clutch means for transmitting and transmitting a transmission force exceeding the predetermined value.

A fuel body size inspection device for measuring a dimension between the fuel rods in a fuel body including a water rod and a fuel rod disposed so as to surround the water rod,
Reflection plate positioning insertion means for inserting a reflection plate between the water rod and the fuel rod;
Illumination means disposed on the anti-water rod side with respect to the inserted reflector,
Imaging that is disposed on the side opposite to the water rod and that captures light transmitted from the fuel rods disposed on the side opposite to the water rod, the light emitted from the illuminating means being reflected by the reflecting plate. Means,
Measuring means for measuring a distance between the fuel rods on the anti-water rod side by measuring a width of light transmitted between the fuel rods from an image captured by the imaging unit. Fuel body size inspection device.

The fuel body size inspection device according to claim 7,
A fuel body size inspection device comprising fuel rod fixing means for correcting deflection and rotation of a fuel rod of the fuel body.

In the fuel body size inspection device according to claim 7 or 8,
The reflector positioning insertion means is
A positioning guide member provided at a predetermined distance away from the reflecting plate so that the reflecting plate can be inserted in a non-contact manner between the water rod and the fuel rod when brought into contact with the outermost fuel rod of the fuel body;
Measurement positioning means for positioning the reflector by moving the reflector and the positioning guide member until the positioning guide contacts the outermost fuel rod of the fuel body;
Reflecting plate moving means for inserting the reflecting plate between the water rod and the fuel rod through clutch means for transmitting a transmitting force equal to or less than a predetermined value and not transmitting a transmitting force exceeding the predetermined value. A fuel rod assembly size inspection apparatus characterized by the above.

The fuel body size inspection device according to claim 8,
The fuel rod fixing means is a pair of fixed members that are moved by the fixing member moving means and the fixing member moving means to press the fuel rod across the opposing side surfaces of the fuel body and correct the deflection and rotation of the fuel rod. And having a member
The fuel body size inspection apparatus, wherein the pressing direction of the fixing member and the reflector inserted between the water rod and the fuel rod are substantially parallel.

In the fuel body size inspection device according to any one of claims 7 to 10,
The said reflector is formed with resin. The fuel body dimension inspection apparatus characterized by the above-mentioned.

A fuel body size inspection device for measuring a distance dimension between the fuel rods in a fuel body including a water rod and a fuel rod disposed so as to surround the water rod,
Light emission positioning insertion means for inserting light emission means between the water rod and the fuel rod;
An imaging unit that is disposed on the anti-water rod side with respect to the light emitting unit, and that images the light emitted from the light emitting unit and transmitted between the fuel rods disposed on the anti-water rod side;
Measuring means for measuring a distance between the fuel rods on the anti-water rod side by measuring a width of light transmitted between the fuel rods from an image captured by the imaging unit. Fuel body size inspection device.

The fuel body size inspection device according to claim 12,
A fuel body size inspection device comprising fuel rod fixing means for correcting deflection and rotation of a fuel rod of the fuel body.

The fuel body size inspection device according to claim 12 or 13,
The light emission positioning insertion means is
A positioning guide member provided apart from the light emitting means by a predetermined distance that allows the light emitting means to be inserted in a non-contact manner between the water rod and the fuel rod when brought into contact with the outermost fuel rod of the fuel body;
Measuring positioning means for moving the light emitting means and the positioning guide member until the positioning guide comes into contact with the outermost fuel rod of the fuel body and positioning the reflector;
And a light emission moving means for inserting the light emitting means between the water rod and the fuel rod through a clutch means for transmitting a transmission force equal to or less than a predetermined value and not transmitting a transmission force exceeding the predetermined value. Fuel rod assembly size inspection device.

The fuel body size inspection device according to claim 13,
The fuel rod fixing means is a pair of fixed members that are moved by the fixing member moving means and the fixing member moving means to press the fuel rod across the opposing side surfaces of the fuel body and correct the deflection and rotation of the fuel rod. And having a member
The fuel body size inspection device, wherein the pressing direction of the fixing member is substantially parallel to the light emitting means inserted between the water rod and the fuel rod.