JPH0772285A - Visual inspection device for fuel assembly - Google Patents
Visual inspection device for fuel assemblyInfo
- Publication number
- JPH0772285A JPH0772285A JP5217378A JP21737893A JPH0772285A JP H0772285 A JPH0772285 A JP H0772285A JP 5217378 A JP5217378 A JP 5217378A JP 21737893 A JP21737893 A JP 21737893A JP H0772285 A JPH0772285 A JP H0772285A
- Authority
- JP
- Japan
- Prior art keywords
- light
- fuel assembly
- slit light
- slit
- camera
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 80
- 238000011179 visual inspection Methods 0.000 title abstract description 17
- 238000012544 monitoring process Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000007689 inspection Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- NCGICGYLBXGBGN-UHFFFAOYSA-N 3-morpholin-4-yl-1-oxa-3-azonia-2-azanidacyclopent-3-en-5-imine;hydrochloride Chemical compound Cl.[N-]1OC(=N)C=[N+]1N1CCOCC1 NCGICGYLBXGBGN-UHFFFAOYSA-N 0.000 description 3
- 230000003028 elevating effect Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002915 spent fuel radioactive waste Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、原子力発電所における
燃料集合体の外観検査装置に関し、特に燃料集合体の燃
料棒の欠陥検査等に適用し得る外観検査装置に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a visual inspection apparatus for a fuel assembly in a nuclear power plant, and more particularly to a visual inspection apparatus applicable to a defect inspection of a fuel rod of a fuel assembly.
【０００２】[0002]
【従来の技術】原子力発電所では、一般に、健全な状態
で発電が行えるように、定期点検毎に各種構造部材の検
査を実施し、その健全性を確保している。原子炉炉心を
構成する燃料集合体も検査の対象であり、その外観検査
は、原子力発電所での健全性確保のために必要不可欠で
ある。2. Description of the Related Art In general, at a nuclear power plant, various structural members are inspected at every periodic inspection to ensure the soundness so that power can be generated in a sound state. The fuel assemblies that make up the nuclear reactor core are also subject to inspection, and their visual inspection is essential for ensuring soundness at nuclear power plants.
【０００３】従来の燃料集合体の外観検査装置は、図１
０に示すように、水を張ったプール１に使用済みの燃料
集合体２を設置し、この燃料集合体２を水中テレビカメ
ラ３で撮像する。水中テレビカメラ３の撮像画像は、同
テレビカメラのコントロールユニット１１を介してモニ
タテレビ１２に表示される。燃料集合体２は回転テーブ
ル７に乗せられているため、これを回転させることによ
り水中テレビカメラ３で燃料集合体２の各面を撮像し、
モニタテレビ１２に表示可能である。A conventional visual inspection apparatus for a fuel assembly is shown in FIG.
As shown in 0, a spent fuel assembly 2 is installed in a pool 1 filled with water, and the fuel assembly 2 is imaged by an underwater television camera 3. The image captured by the underwater television camera 3 is displayed on the monitor television 12 via the control unit 11 of the television camera. Since the fuel assembly 2 is placed on the turntable 7, the underwater television camera 3 images each surface of the fuel assembly 2 by rotating the turntable 7.
It can be displayed on the monitor television 12.
【０００４】更に、水中テレビカメラ３は、防水ケース
４に収納されて、燃料集合体２を照明するための水中照
明装置５と共に、昇降マスト６ａに沿って昇降可能な基
台６ｂに設置されており、昇降装置６により基台６ｂを
駆動することにより、昇降される。この時、水中テレビ
カメラ３や水中照明装置５のケーブル８はドラム９によ
り繰り出されたり巻き取られたりする。Further, the underwater television camera 3 is housed in a waterproof case 4, and is installed on a base 6b which can be moved up and down along an elevating mast 6a together with an underwater lighting device 5 for illuminating the fuel assembly 2. The elevator 6 is moved up and down by driving the base 6b. At this time, the cable 8 of the underwater television camera 3 and the underwater lighting device 5 is paid out or wound up by the drum 9.
【０００５】水中テレビカメラ３の昇降マスト６上での
位置は昇降位置センサ１３により検出され、文字発生装
置１４によりモニタテレビ１２に表示されて、現在、ど
の部分を検査しているかが把握できる。１０は電源装置
である。The position of the underwater television camera 3 on the elevation mast 6 is detected by the elevation position sensor 13 and displayed on the monitor television 12 by the character generator 14 so that the user can know which part is currently inspected. 10 is a power supply device.
【０００６】以上のような構成において、検査員は、水
中テレビカメラ３を昇降させると共に燃料集合体２を回
転テーブル７で回転させながら、水中テレビカメラ３で
撮像された画像をモニタテレビ１２で目視検査する。こ
の場合、モニタテレビ１２上には、１段目の燃料棒３０
の陰に２段目の燃料棒が完全に隠れていると、図１１に
拡大して示すように、１段目の燃料棒３０が白く描かれ
ているように表示され、１段目の燃料棒間の隙間は便宜
的にハッチングして示すように暗い部分となって表れ
る。In the above-described structure, the inspector looks at the image taken by the underwater television camera 3 on the monitor television 12 while moving the underwater television camera 3 up and down and rotating the fuel assembly 2 by the turntable 7. inspect. In this case, the first stage fuel rod 30 is displayed on the monitor TV 12.
When the fuel rods of the second stage are completely hidden behind, the fuel rods 30 of the first stage are displayed as shown in white, as shown in an enlarged view in FIG. The gap between the bars appears as a dark portion as shown by hatching for convenience.
【０００７】また、２段目の燃料棒３１が１段目の燃料
棒間に見えていると、図１２に示すような画像がモニタ
テレビ１２の画面に表れる。図１２から分かるように、
２段目の燃料棒３１が１段目の燃料棒３０間から見えて
いる場合、画像を注意深く見ていないと、１段目の燃料
棒３０と２段目の燃料棒３１の境界が明瞭に観察でき
ず、１段目の燃料棒３０の間隔を正確に測定できないた
め、欠陥部を屡々見落とすことがあった。When the second-stage fuel rod 31 is seen between the first-stage fuel rods, an image as shown in FIG. 12 appears on the screen of the monitor television 12. As can be seen from FIG.
When the second-stage fuel rods 31 are visible from between the first-stage fuel rods 30, the boundary between the first-stage fuel rods 30 and the second-stage fuel rods 31 becomes clear unless the image is carefully watched. Since it was not possible to observe and the interval between the fuel rods 30 in the first stage could not be measured accurately, the defective portion was often overlooked.
【０００８】そのため、検査用の画像を見易くして検査
を確実且つ容易に行い得るように、実公平３−４６４０
０号公報には、図１０に示した水中照明装置５に加え
て、図１３に示すように、検査領域に対し照射角θで、
幅Ｗの帯状平行光束（スリット光）の照明を出す光源１
１３を搭載した核燃料集合体の外観検査装置が開示され
ている。この従来例では、Ｗ／sinθ＜Ｐ(Ｐは燃料棒の
ピッチ）の関係を満たすように設置すれば、スリット光
の照射されている部分の燃料棒３０の奥行き方向の距離
差により、撮像される画像のスリット光の位置が変化
し、図１４に示すように、立体感のある画像が得られ
る。尚、図１３において、１１４は集束レンズ、１１５
は線状ランプ、１１６はスリットである。Therefore, in order to make the image for inspection easy to see and to perform the inspection surely and easily, the actual fairness 3-4640.
No. 0 publication, in addition to the underwater illumination device 5 shown in FIG. 10, as shown in FIG.
A light source 1 for illuminating a band-shaped parallel light flux (slit light) having a width W
A visual inspection apparatus for a nuclear fuel assembly equipped with No. 13 is disclosed. In this conventional example, if it is installed so as to satisfy the relationship of W / sin θ <P (P is the pitch of the fuel rods), an image is taken due to the distance difference in the depth direction of the fuel rods 30 where the slit light is irradiated. The position of the slit light of the image changes, and a stereoscopic image is obtained as shown in FIG. In FIG. 13, 114 is a focusing lens and 115
Is a linear lamp and 116 is a slit.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、前述し
た実公平３−４６４００号公報記載の技術では、立体感
が得られるため、１段目の燃料棒３０と２段目の燃料棒
３１の境界が明瞭に判別でき、燃料棒の間隔は正確に検
査できるものの、１本のスリット光による立体感である
ため、視野内全域の立体感を得るためにはスリット光源
１１３を上下に移動させる必要があり、また、燃料集合
体の倒れや、反りは判断できない。However, in the technique described in Japanese Utility Model Publication No. 3-46400 described above, a three-dimensional effect is obtained, so that the boundary between the first-stage fuel rod 30 and the second-stage fuel rod 31 is Although it can be clearly discriminated and the distance between the fuel rods can be accurately inspected, it is necessary to move the slit light source 113 up and down in order to obtain a stereoscopic effect in the entire field of view because of the stereoscopic effect of one slit light. Also, it is not possible to judge the collapse or warpage of the fuel assembly.
【００１０】従って、本発明の目的は、カラーテレビカ
メラの視野内全域で立体感のある画像を表示可能であ
り、しかも燃料集合体の倒れや、反りも判断できる燃料
集合体の外観検査装置を提供することである。Therefore, an object of the present invention is to provide a visual inspection apparatus for a fuel assembly, which can display a stereoscopic image in the entire field of view of a color television camera, and which can judge the collapse and warpage of the fuel assembly. Is to provide.
【００１１】[0011]
【課題を解決するための手段】上述の目的を達成するた
め、本発明による燃料集合体の外観検査装置は、単一波
長の光を出す単一波長源と、該単一波長源から出射され
る前記単一波長の光をスリット光に変換するための円柱
レンズと、広がりを持つスリット光を平行スリット光に
変換するための凹面鏡と、該平行スリット光を複数本の
スリット光に変換するための回折格子と、該複数のスリ
ット光が燃料集合体に当たって反射してくる反射光を撮
像するための水中テレビカメラと、該水中テレビカメラ
の出力画像を表示するモニタテレビとを備えている。To achieve the above object, a visual inspection apparatus for a fuel assembly according to the present invention comprises a single wavelength source which emits light of a single wavelength and a light source which emits light from the single wavelength source. A cylindrical lens for converting the light of the single wavelength into slit light, a concave mirror for converting the spread slit light into parallel slit light, and for converting the parallel slit light into a plurality of slit lights Of the above-mentioned diffraction grating, an underwater television camera for capturing the reflected light reflected by the plurality of slit lights hitting the fuel assembly, and a monitor television for displaying an output image of the underwater television camera.
【００１２】[0012]
【作用】単一波長源から出射された単一波長の光は円柱
レンズによりスリット光に変換される。円柱レンズから
出射されるスリット光は扇状に広がりを持つため、これ
を、凹面鏡により、検査対象である燃料集合体の幅以上
の幅を持つ平行スリット光に変換する。凹面鏡から出力
される平行スリット光は回折格子により干渉されて、そ
の回折縞として複数のスリット光が得られる。このとき
の回折縞の出射角度θiは回折格子に対してスリット光
を垂直に入射した場合、次式で与えられる。The single-wavelength light emitted from the single-wavelength source is converted into slit light by the cylindrical lens. Since the slit light emitted from the cylindrical lens has a fan-like spread, it is converted into parallel slit light having a width equal to or larger than the width of the fuel assembly to be inspected by the concave mirror. The parallel slit light output from the concave mirror is interfered by the diffraction grating, and a plurality of slit lights are obtained as the diffraction fringes. The exit angle θ i of the diffraction fringes at this time is given by the following equation when the slit light is perpendicularly incident on the diffraction grating.
【数１】θi＝ｓｉｎ-1（Ｎλ／ｄ） ここで、Ｎは回折次数、λは単一波長光の波長、ｄは回
折格子のピッチである。## EQU1 ## θ i = sin -1 (Nλ / d) where N is the diffraction order, λ is the wavelength of the single wavelength light, and d is the pitch of the diffraction grating.
【００１３】このようにして出射された複数スリット光
は、平行光であるため少ない死角で燃料集合体に照射さ
れ、燃料集合体に当たって反射してくる反射光を水中テ
レビカメラにて撮像し、モニタテレビに表示する。この
結果、水中テレビカメラの視野内には、複数のスリット
光が撮像され、各スリット光により視野内全域の燃料集
合体の立体感が得られると共に、スリット光の間隔から
燃料集合体の倒れや、反りも判断できるようになる。Since the plural slit lights emitted in this way are parallel lights, they are irradiated to the fuel assembly with a small blind spot, and the reflected light reflected upon hitting the fuel assembly is imaged by the underwater television camera and monitored. Display on TV. As a result, a plurality of slit lights are imaged in the field of view of the underwater television camera, each slit light gives a three-dimensional effect of the fuel assembly in the entire field of view, and the fuel assembly collapses due to the slit light interval. , You can also judge the warp.
【００１４】[0014]
【実施例】次に、本発明の好適な実施例について添付図
面を参照して詳細に説明するが、図中、同一符号は同一
又は対応部分を示すものとする。Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.
【００１５】図１は、本発明の一実施例としての燃料集
合体の外観検査装置の構成を示している。図１０の従来
例と同様に、水を張ったプール１に使用済みの燃料集合
体２を設置し、この燃料集合体２を本発明によれば複数
スリット光投影装置２０により照明しつつ水中テレビカ
メラ３で撮像する。水中テレビカメラ３の撮像画像は、
同テレビカメラのコントロールユニット１１を介してモ
ニタテレビ１２に表示される。燃料集合体２は回転テー
ブル７に乗せられているため、これを回転させることに
より水中テレビカメラ３で燃料集合体２の各面を撮像
し、モニタテレビ１２に表示可能である。FIG. 1 shows the construction of a fuel assembly visual inspection apparatus as an embodiment of the present invention. As in the conventional example of FIG. 10, a used fuel assembly 2 is installed in a pool 1 filled with water, and this fuel assembly 2 is illuminated by a multi-slit light projection device 20 according to the present invention while being used in an underwater television. The image is taken by the camera 3. The image captured by the underwater television camera 3 is
It is displayed on the monitor television 12 via the control unit 11 of the television camera. Since the fuel assembly 2 is placed on the turntable 7, by rotating the turntable 7, each surface of the fuel assembly 2 can be imaged by the underwater television camera 3 and displayed on the monitor television 12.
【００１６】更に、テレビカメラ３は、防水ケース４に
収納されて、上述した複数スリット光投影装置２０及び
水中照明装置５と共に、昇降マスト６ａに沿って昇降可
能な基台６ｂに設置されており、昇降装置６により基台
６ｂを駆動することにより、昇降される。この時、テレ
ビカメラ３や、水中照明装置５及び複数スリット光投影
装置２０のケーブル８はドラム９により繰り出されたり
巻き取られたりする。テレビカメラ３等の昇降マスト６
ａ上での位置は昇降位置センサ１３により検出され、文
字発生装置１４によりモニタテレビ１２に表示されて、
現在、どの部分を検査しているかが把握できる。１０は
電源装置である。Further, the television camera 3 is housed in the waterproof case 4, and is installed on the base 6b which can be moved up and down along the lift mast 6a together with the plural slit light projection device 20 and the underwater lighting device 5 described above. By driving the base 6b by the elevating device 6, the elevating device 6 elevates. At this time, the cable 8 of the television camera 3, the underwater illumination device 5, and the multiple slit light projection device 20 is fed or wound by the drum 9. Lifting mast 6 for TV camera 3 etc.
The position on a is detected by the lift position sensor 13 and displayed on the monitor TV 12 by the character generator 14.
You can grasp which part is currently inspected. 10 is a power supply device.
【００１７】本発明により新たに追加された複数スリッ
ト光投影装置２０の詳細な構成は図２に概念的に示され
ている。複数スリット光投影装置２０は、本実施例で
は、単一波長の光を出射する光源としてのレーザ光源
（単一波長源）２１と、コリメータレンズ２２と、円柱
レンズ２３と、凹面鏡２４と、回折格子２５とを有し、
これ等は水中ケース３２に収納される。The detailed structure of the multi-slit light projection device 20 newly added according to the present invention is conceptually shown in FIG. In this embodiment, the multi-slit light projection device 20 includes a laser light source (single wavelength source) 21 as a light source that emits light of a single wavelength, a collimator lens 22, a cylindrical lens 23, a concave mirror 24, and a diffractive mirror 24. And a grid 25,
These are stored in the underwater case 32.
【００１８】レーザ光源２１の出射するレーザ光（単一
波長の光）３３はコリメータレンズ２２により平行なス
ポット光２６に変換される。同平行スポット光２６は、
水中テレビカメラ３に対してその軸方向を垂直に設置し
た円柱レンズ２３により水中テレビカメラ３の視野に対
して水平な広がりを持つスリット光２７に変換される。
この時のスポット光２６の径により扇状スリット光２７
の幅が決定される。The laser light (light of a single wavelength) 33 emitted from the laser light source 21 is converted into parallel spot light 26 by the collimator lens 22. The parallel spot light 26 is
The cylindrical lens 23 is installed so that its axial direction is perpendicular to the underwater television camera 3, and is converted into slit light 27 having a horizontal spread with respect to the field of view of the underwater television camera 3.
Depending on the diameter of the spot light 26 at this time, the fan-shaped slit light 27
Width is determined.
【００１９】円柱レンズ２３を通過したスリット光２７
は、図８に示すように、円柱レンズ２３の軸心上に中心
を持つ扇形の形状をしているが、これを、凹面鏡２４に
より燃料集合体２の検査対象領域の幅以上の幅を有する
平行なスリット光２８に変換する。凹面鏡２４は、図９
に示すように、同凹面鏡２４で反射した扇状スリット光
２７に対して、幅方向には一切変化を与えないが、長手
方向には平行スリット光２８とするように、円柱レンズ
２３との相対位置関係及び曲率が決定されている。Slit light 27 passing through the cylindrical lens 23
8 has a fan-like shape having a center on the axial center of the cylindrical lens 23 as shown in FIG. 8, and this has a width equal to or larger than the width of the inspection target region of the fuel assembly 2 by the concave mirror 24. It is converted into parallel slit light 28. The concave mirror 24 is shown in FIG.
As shown in FIG. 3, the fan-shaped slit light 27 reflected by the concave mirror 24 does not change in the width direction at all, but the parallel slit light 28 is formed in the longitudinal direction, so that the relative position with respect to the cylindrical lens 23. Relationships and curvatures have been determined.
【００２０】その後、平行スリット光２８は、同平行ス
リット光の長手方向に平行に格子構造を有する回折格子
２５により回折され、複数のスリット光２９に変換さ
れ、複数スリット光投影装置２０から出射される。After that, the parallel slit light 28 is diffracted by the diffraction grating 25 having a grating structure parallel to the longitudinal direction of the parallel slit light, converted into a plurality of slit lights 29, and emitted from the multiple slit light projector 20. It
【００２１】この時、出射される複数のスリット光２９
の出射角度は次式で表される。At this time, a plurality of slit light beams 29 are emitted.
The emission angle of is expressed by the following equation.
【数２】 θi＝ｓｉｎ-1（Ｎλ／ｄ） （１） ここで、Ｎは回折次数、λはレーザ光の波長、ｄは回折
格子２５の格子ピッチである。## EQU2 ## θ i = sin -1 (Nλ / d) (1) where N is the diffraction order, λ is the wavelength of the laser beam, and d is the grating pitch of the diffraction grating 25.
【００２２】上述した外観検査装置は、光源として単一
波長の光を用い、その可干渉性、屈折、反射等を利用し
た光学系で構成されているため、光学的な損失が少な
く、エネルギー効率の高い複数スリット光２９が出射可
能である。The above-mentioned appearance inspection apparatus uses light of a single wavelength as a light source and is composed of an optical system utilizing its coherence, refraction, reflection, etc., so that there is little optical loss and energy efficiency. It is possible to emit a plurality of high-slit light beams 29.
【００２３】以上のような複数スリット光投影装置２０
から出射された複数スリット光２９は燃料集合体２に照
射される。この時、図３に示すように複数スリット光投
影装置２０が燃料集合体２に対して照射角θで方向付け
られており、且つ燃料棒３０の前面までの水平距離がＤ
であるとすると、各スリット光２９が存在する位置は、
上記（１）式に基づいて、次式で表される。The multi-slit light projection device 20 as described above
The plurality of slit lights 29 emitted from the fuel assembly 2 are irradiated to the fuel assembly 2. At this time, as shown in FIG. 3, the multi-slit light projection device 20 is oriented at the irradiation angle θ with respect to the fuel assembly 2, and the horizontal distance to the front surface of the fuel rod 30 is D.
, The position where each slit light 29 exists is
It is expressed by the following equation based on the equation (1).
【数３】 Ｚi＝Ｄ×ｔａｎ｛θ±ｓｉｎ-1（Ｎλ／ｄ）｝ （２）Z i = D × tan {θ ± sin −1 (Nλ / d)} (2)
【００２４】水中テレビカメラ３が水平に撮像している
と考えると、この位置Ｚiに比例した位置に、モニタテ
レビ１２上でスリット光２９が観測される。各スリット
光２９の１本１本は、(２）式から明らかなように、照
射角θに照射角θiを加減した角度で照射されており、
また、凹面鏡２４により平行スリット光となっているた
め、１段目の燃料棒３０の陰になることなく２段目の燃
料棒３１にもスリット光２９が照射され、燃料集合体２
の奥行き方向の形状によりモニタテレビ１２上で観測さ
れる形状が異なり、図４に示すように１段目の燃料棒３
０と２段目の燃料棒３１の境界が明瞭に判別でき、燃料
棒３０の間隔は正確に検査できる。Assuming that the underwater television camera 3 is horizontally picking up an image, slit light 29 is observed on the monitor television 12 at a position proportional to this position Z i . As is clear from the equation (2), each slit light 29 is emitted at an angle obtained by adjusting the irradiation angle θ to the irradiation angle θ i ,
Moreover, since the parallel slit light is formed by the concave mirror 24, the slit light 29 is also applied to the second-stage fuel rod 31 without being shaded by the first-stage fuel rod 30, and the fuel assembly 2
The shape observed on the monitor TV 12 varies depending on the shape of the fuel rod 3 in the depth direction, and as shown in FIG.
The boundary between the fuel rods 31 at the 0th and 2nd stages can be clearly discriminated, and the distance between the fuel rods 30 can be accurately inspected.
【００２５】また、燃料集合体２に倒れや反りがない時
は、図５に示すように燃料棒３０の前面に照射されてい
る複数スリット光２９は、（２）式で計算される位置に
照射されており、それぞれ画像上で一定の位置に観測さ
れる。更に、各スリット光２９の間隔も（２）式で計算
される間隔となり、画像上で対応する間隔に観測され
る。Further, when the fuel assembly 2 does not fall or warp, the plural slit lights 29 irradiated on the front surface of the fuel rod 30 as shown in FIG. 5 come to the position calculated by the equation (2). It is illuminated, and each is observed at a fixed position on the image. Further, the intervals of the slit lights 29 are also intervals calculated by the equation (2), and are observed at corresponding intervals on the image.
【００２６】しかしながら、燃料棒３０が図６に示すよ
うに倒れていると、モニタテレビ１２上でのスリット光
２９の位置と、スリット光２９の間隔とが正常時とは異
なって観測される。また、図７に示すように、燃料棒３
０が反っている場合についても同様に、スリット光２９
の撮像位置及び間隔が異なり、容易に目視確認が可能と
なる。However, when the fuel rod 30 is tilted as shown in FIG. 6, the position of the slit light 29 on the monitor TV 12 and the interval of the slit light 29 are observed differently from the normal state. In addition, as shown in FIG.
Similarly, when 0 is warped, the slit light 29
Since the image pickup positions and intervals are different, it is possible to easily perform visual confirmation.
【００２７】[0027]
【発明の効果】以上のように、本発明によれば、円柱レ
ンズ、凹面鏡、回析格子等という簡単な光学装置を用い
るのみの構成で、原子力発電所の燃料集合体の外観検査
作業において、燃料棒の欠陥検査を後段の燃料棒により
悪影響を受けることなく実施でき、また、水中テレビカ
メラにより得られる２次元の画像では判断し難い燃料集
合体構成部品の凹みや、捲れ等の立体的な形状検査も容
易に実施可能となり、更に、水中テレビカメラで撮像さ
れている領域の全域において同時に立体感が得られるた
め、燃料集合体の倒れや反りなどの検査も実施できる等
産業上の利用効果は極めて大きい。As described above, according to the present invention, in the visual inspection work of the fuel assembly of the nuclear power plant, only the simple optical device such as the cylindrical lens, the concave mirror, and the diffraction grating is used. Defect inspection of fuel rods can be carried out without being adversely affected by the fuel rods in the subsequent stage, and it is difficult to judge from a two-dimensional image obtained by an underwater television camera. The shape inspection can be easily performed, and the stereoscopic effect can be obtained at the same time over the entire area imaged by the underwater television camera. Therefore, the fuel assembly can be inspected for tilt or warp. Is extremely large.
【図面の簡単な説明】[Brief description of drawings]
【図１】 本発明の一実施例としての燃料集合体の外観
検査装置の概略構成図。FIG. 1 is a schematic configuration diagram of a visual inspection apparatus for a fuel assembly as an embodiment of the present invention.
【図２】 図１の外観検査装置における複数スリット光
投影装置の構成を示す概要図。FIG. 2 is a schematic diagram showing the configuration of a multiple slit light projection device in the visual inspection apparatus of FIG.
【図３】 図２の複数スリット光投影装置のスリット光
照射状況を説明するための図。FIG. 3 is a view for explaining a slit light irradiation state of the multiple slit light projection device of FIG.
【図４】 図１の外観検査装置による燃料棒の隙間計測
状況の説明図。4 is an explanatory view of a fuel rod gap measurement state by the appearance inspection device of FIG. 1. FIG.
【図５】 図１の外観検査装置による燃料集合体の倒
れ、反りの検査作業の説明図。5 is an explanatory view of an inspection work for tilting and warping of a fuel assembly by the appearance inspection device of FIG.
【図６】 図１の外観検査装置において燃料集合体が倒
れているときの状況を説明するための図。FIG. 6 is a view for explaining the situation when the fuel assembly is tilted in the visual inspection device of FIG. 1.
【図７】 図１の外観検査装置において燃料集合体が反
っているときの状況を説明するための図。FIG. 7 is a view for explaining the situation when the fuel assembly is warped in the appearance inspection device of FIG. 1.
【図８】 図２の複数スリット光投影装置における扇状
スリット光の説明図。FIG. 8 is an explanatory diagram of fan-shaped slit light in the multiple slit light projection device of FIG.
【図９】 図２の複数スリット光投影装置における凹面
鏡によるスリット光の平行化の説明図。FIG. 9 is an explanatory diagram of parallelization of slit light by a concave mirror in the multiple slit light projector of FIG.
【図１０】 従来の燃料集合体の外観検査装置の概略構
成図。FIG. 10 is a schematic configuration diagram of a conventional fuel assembly visual inspection apparatus.
【図１１】 図１０の外観検査装置により得られる燃料
集合体の撮像状況を説明するための図。FIG. 11 is a diagram for explaining an imaging situation of a fuel assembly obtained by the appearance inspection device of FIG.
【図１２】 図１０の外観検査装置により得られる燃料
集合体の別の撮像状況を説明するための図。12 is a view for explaining another imaging situation of the fuel assembly obtained by the appearance inspection device of FIG.
【図１３】 別の従来の燃料集合体の外観検査装置の構
成を説明するための図。FIG. 13 is a view for explaining the configuration of another conventional visual inspection apparatus for a fuel assembly.
【図１４】 図１３の外観検査装置による燃料集合体の
検査状況を説明するための図。FIG. 14 is a view for explaining the inspection status of the fuel assembly by the appearance inspection device of FIG.
２…燃料集合体、３…水中テレビカメラ、１２…モニタ
テレビ、２０…複数スリット光投影装置、２１…レーザ
光源（単一波長源）、２３…円柱レンズ、２４…凹面
鏡、２５…回折格子、２６…スポット光（単一波長の
光）、２７…広がりを持つスリット光（扇状スリット
光）、２８…平行スリット光、２９…複数スリット光、
３０…１段目の燃料棒、３１…２段目の燃料棒、３３…
レーザ光（単一波長の光）。2 ... Fuel assembly, 3 ... Underwater TV camera, 12 ... Monitor TV, 20 ... Multiple slit light projection device, 21 ... Laser light source (single wavelength source), 23 ... Cylindrical lens, 24 ... Concave mirror, 25 ... Diffraction grating, 26 ... Spot light (light of a single wavelength), 27 ... Slit light having a spread (fan-shaped slit light), 28 ... Parallel slit light, 29 ... Multiple slit light,
30 ... 1st fuel rod, 31 ... 2nd fuel rod, 33 ...
Laser light (light of a single wavelength).
Claims (1)
一波長源から出射される前記単一波長の光をスリット光
に変換するための円柱レンズと、広がりを持つスリット
光を平行スリット光に変換するための凹面鏡と、該平行
スリット光を複数本のスリット光に変換するための回折
格子と、該複数のスリット光が燃料集合体に当たって反
射してくる反射光を撮像するための水中テレビカメラ
と、該水中テレビカメラの出力画像を表示するモニタテ
レビとを有する燃料集合体の外観検査装置。1. A slit light having a single wavelength source for emitting light of a single wavelength, a cylindrical lens for converting the light of the single wavelength emitted from the single wavelength source into slit light, and a slit light having a spread. Concave mirror for converting the parallel slit light into parallel slit light, a diffraction grating for converting the parallel slit light into a plurality of slit lights, and the reflected light reflected by the plurality of slit lights hitting the fuel assembly. For visually inspecting a fuel assembly having an underwater television camera for monitoring, and a monitor television for displaying an output image of the underwater television camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5217378A JP3051609B2 (en) | 1993-09-01 | 1993-09-01 | Appearance inspection system for fuel assemblies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5217378A JP3051609B2 (en) | 1993-09-01 | 1993-09-01 | Appearance inspection system for fuel assemblies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0772285A true JPH0772285A (en) | 1995-03-17 |
| JP3051609B2 JP3051609B2 (en) | 2000-06-12 |
Family
ID=16703240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5217378A Expired - Lifetime JP3051609B2 (en) | 1993-09-01 | 1993-09-01 | Appearance inspection system for fuel assemblies |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3051609B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000230995A (en) * | 1999-02-12 | 2000-08-22 | Hitachi Ltd | Visual inspection equipment with underwater lighting equipment |
| JP2010122094A (en) * | 2008-11-20 | 2010-06-03 | Nuclear Fuel Ind Ltd | Reflecting mirror for fuel assembly visual inspection apparatus and the fuel assembly visual inspection apparatus |
| JP2010210464A (en) * | 2009-03-11 | 2010-09-24 | Hitachi-Ge Nuclear Energy Ltd | Method of surveying fuel assembly |
| JP2015105855A (en) * | 2013-11-29 | 2015-06-08 | 株式会社石井鐵工所 | Underwater detector |
| CN106098124A (en) * | 2016-07-05 | 2016-11-09 | 中国核动力研究设计院 | A kind of fuel assembly altitude measurement system under water and measuring method thereof |
| CN106098125A (en) * | 2016-07-05 | 2016-11-09 | 中国核动力研究设计院 | A kind of fuel assembly Underwater Navigation screen work width measure system and measuring method thereof |
| KR102646988B1 (en) * | 2023-06-30 | 2024-03-14 | 주식회사 스탠더드시험연구소 | Simulation device and method for measuring bowing deformation of nuclear fuel assembly |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5581563B2 (en) * | 2007-03-08 | 2014-09-03 | 株式会社日立製作所 | Illumination apparatus, defect inspection apparatus and method using the same, height measurement apparatus and method |
-
1993
- 1993-09-01 JP JP5217378A patent/JP3051609B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000230995A (en) * | 1999-02-12 | 2000-08-22 | Hitachi Ltd | Visual inspection equipment with underwater lighting equipment |
| JP2010122094A (en) * | 2008-11-20 | 2010-06-03 | Nuclear Fuel Ind Ltd | Reflecting mirror for fuel assembly visual inspection apparatus and the fuel assembly visual inspection apparatus |
| JP2010210464A (en) * | 2009-03-11 | 2010-09-24 | Hitachi-Ge Nuclear Energy Ltd | Method of surveying fuel assembly |
| JP2015105855A (en) * | 2013-11-29 | 2015-06-08 | 株式会社石井鐵工所 | Underwater detector |
| CN106098124A (en) * | 2016-07-05 | 2016-11-09 | 中国核动力研究设计院 | A kind of fuel assembly altitude measurement system under water and measuring method thereof |
| CN106098125A (en) * | 2016-07-05 | 2016-11-09 | 中国核动力研究设计院 | A kind of fuel assembly Underwater Navigation screen work width measure system and measuring method thereof |
| KR102646988B1 (en) * | 2023-06-30 | 2024-03-14 | 주식회사 스탠더드시험연구소 | Simulation device and method for measuring bowing deformation of nuclear fuel assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3051609B2 (en) | 2000-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7791725B2 (en) | Method and equipment for detecting pattern defect | |
| US4330775A (en) | Apparatus for inspecting defects in a periodic pattern | |
| EP2753267B1 (en) | Method and device for three-dimensional confocal measurement | |
| KR101652133B1 (en) | Illumination subsystems of a metrology system, metrology systems, and methods for illuminating a specimen for metrology measurements | |
| DE3930632A1 (en) | METHOD FOR DIRECT PHASE MEASUREMENT OF RADIATION, IN PARTICULAR LIGHT RADIATION, AND DEVICE FOR CARRYING OUT THIS METHOD | |
| WO2012134625A2 (en) | Illuminating a specimen for metrology or inspection | |
| JP2003329610A (en) | Pattern defect inspection method and apparatus | |
| JP2004101532A (en) | Confocal distance sensor | |
| KR20130092429A (en) | Image generation device | |
| JPH03183904A (en) | Detection of shape of object | |
| JP3051609B2 (en) | Appearance inspection system for fuel assemblies | |
| JP2004101530A (en) | Confocal distance sensor | |
| Knight et al. | Three-dimensional imaging using a single laser pulse | |
| KR102761217B1 (en) | Method for measuring reflectivity of an object for measurement light and a measuring system for performing the same | |
| JPH10197215A (en) | Optical inspection equipment for inner walls of tubular products | |
| JP3710971B2 (en) | Method and apparatus for inspecting the bonding of honeycomb cores on the skin | |
| JP3099462B2 (en) | Cylindrical surface inspection method and apparatus | |
| JP2010210464A (en) | Method of surveying fuel assembly | |
| JP3073557B2 (en) | Fuel rod spacing measurement method and apparatus | |
| JP3085828B2 (en) | Appearance inspection system for fuel assemblies | |
| US6295335B1 (en) | Radiographic control of an object having a crystal lattice | |
| JP2016125894A (en) | Object detection device | |
| JPH0346400Y2 (en) | ||
| JP2001059941A (en) | Fiberscope system | |
| JP2992075B2 (en) | Light beam scanning device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20000307 |