JPH01311295A - Underwater lighting device for inspecting fuel assembly - Google Patents

Underwater lighting device for inspecting fuel assembly

Info

Publication number
JPH01311295A
JPH01311295A JP63140898A JP14089888A JPH01311295A JP H01311295 A JPH01311295 A JP H01311295A JP 63140898 A JP63140898 A JP 63140898A JP 14089888 A JP14089888 A JP 14089888A JP H01311295 A JPH01311295 A JP H01311295A
Authority
JP
Japan
Prior art keywords
pole
main body
fuel
lighting device
fuel assembly
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.)
Pending
Application number
JP63140898A
Other languages
Japanese (ja)
Inventor
Akira Fujinami
藤波 章
Kazuyuki Doi
土肥 和幸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Engineering and Construction Co Ltd
Original Assignee
Toshiba Engineering and Construction Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Engineering and Construction Co Ltd filed Critical Toshiba Engineering and Construction Co Ltd
Priority to JP63140898A priority Critical patent/JPH01311295A/en
Publication of JPH01311295A publication Critical patent/JPH01311295A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

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  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

PURPOSE:To facilitate handling by positioning a lighting device main body on the opposite side from a TV camera about the fuel assembly where many fuel rods are arranged in parallel while having mutual gaps. CONSTITUTION:The TV camera 4 is suspended from one flank side of the fuel assembly 6 through a pole 21, whose upper end is held by one handrail of an operation rack 10. The upper end of a pole 9 where the light device main body 8 is held at its lower end through a frame part 26 is supported by the handrail 11 through a fitting part 12 and a hook 14. An end part of a fall preventive wire 16 is engaged with the upper end of the pole 9 and a handle 5 is provided to the upper end of the pole 9, and the pole 9 is rotatable on the axis of the hand and a dimming device 13 is fitted in parallel to the fitting part 12. A cable 22 which is guided from the upper end of the main body 8 is coupled with the device 13, which is connected to a power source. While an image is viewed on a monitor TV, the illuminance of the main body 8 and the incidence direction of light are adjusted, a channel elevating machine is elevated to move the assembly 6, and it is confirmed that the intervals of the fuel rods 35 are not uneven.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、原子力発電所において使用された燃料集合体
を燃料プール内でモニタ用TVカメラで検査するための
水中照明装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an underwater illumination device for inspecting fuel assemblies used in nuclear power plants with a monitoring TV camera in a fuel pool.

〔従 来 技 術〕[Traditional technique]

原子力発電所における核燃料は、被覆管の中にペレット
を詰め込んで細長い燃料棒を形成し、多数のその燃料棒
をスペーサを介して僅かずつ隙間をあけて並列させて燃
料集合体を構成する。
Nuclear fuel in nuclear power plants is produced by packing pellets into cladding tubes to form elongated fuel rods, and constructing fuel assemblies by arranging a large number of the fuel rods in parallel with slight gaps between them via spacers.

このような燃料集合体はその周囲を角筒状のチャンネル
ボックスで被覆して炉芯に装填されるものである。この
燃料集合体は適宜新しいそれと交換され、必要に応じて
定期的に燃料の目視検査が行われる。
Such a fuel assembly is surrounded by a rectangular cylindrical channel box and then loaded into the reactor core. The fuel assembly is replaced with a new one from time to time, and visual inspection of the fuel is performed periodically as necessary.

燃料の目視検査は通常、燃料集合体を炉芯に装填する前
と、それを装填して使用した後に炉芯から燃料プールへ
移送し、そこでチャンネル着脱機より燃料集合体を被覆
しているチャンネルボックスを除去した後、モニタ用水
中TVカメラで夫々の被覆管の外観を映像として捉え、
遠隔に設置したモニタ装置により検査している。
Visual inspection of the fuel is normally performed before loading the fuel assembly into the core, and after it has been loaded and used, it is transferred from the core to the fuel pool, where a channel attachment/detachment machine inspects the channels covering the fuel assembly. After removing the box, we captured the appearance of each cladding tube as a video using an underwater TV camera for monitoring.
Inspections are conducted using remotely installed monitoring equipment.

そして燃料に異常がないことが確認されたものは炉芯に
装填される。又、多数の燃料棒のうち不良の燃料棒は、
その被覆管が変形することがある。これをモニタにより
、検出するものである。このような被覆管が変形した燃
料棒は他の燃料棒との隙間が不揃いになることにより、
それを見つけ出すことができる。
If it is confirmed that there are no abnormalities in the fuel, it is loaded into the reactor core. Also, among the large number of fuel rods, defective fuel rods are
The cladding may become deformed. This is detected by a monitor. Fuel rods with deformed cladding tubes have uneven gaps between them and other fuel rods, resulting in
you can find it.

従来、このような検査のためには、水中用の投光機をT
Vカメラに取付けていた。
Conventionally, for such inspections, an underwater floodlight was used.
It was attached to the V camera.

〔発明が解決しようとする課題〕 このような方法による照明方法は、カメラと照明装置と
が一体であるため、取扱いにくい欠点があった。そのた
め燃料集合体の検査に多くの時間を要していた。
[Problems to be Solved by the Invention] The illumination method using such a method has the disadvantage that it is difficult to handle because the camera and the illumination device are integrated. Therefore, it took a lot of time to inspect the fuel assembly.

〔課題を解決するための手段〕[Means to solve the problem]

そこで本発明は各種実験の結果、照明装置を燃料集合体
の裏側に位置させ、その照度を変化させながら燃料集合
体の表側よりモニタ用TVカメラを見ることが最も能率
が良いことを発見し、その知見に基づいて本装置を案出
したものであり、その構成は次の通りである。
Therefore, as a result of various experiments, the present invention discovered that it is most efficient to place the lighting device on the back side of the fuel assembly and view the monitor TV camera from the front side of the fuel assembly while changing the illuminance. The present device was devised based on this knowledge, and its configuration is as follows.

即ち、燃料プール1の内側の側壁2に垂直に設けられた
チャンネル着脱機用ガイドレール3の近傍にモニタ用T
Vカメラ4が位置される。
That is, a monitor T is installed near the guide rail 3 for the channel attachment/detachment machine, which is vertically provided on the inner side wall 2 of the fuel pool 1.
V camera 4 is positioned.

そして、その着脱機に昇降自在に載置された原子炉燃料
集合体6をモニタTVカメラ4により検査する際に用い
る検査用水中照明装置である。
This is an underwater inspection lighting device used when inspecting the reactor fuel assembly 6 mounted on the attachment/detachment machine so that it can be raised and lowered using the monitor TV camera 4.

ここにおいて本発明の特徴とするところは、互いに隙間
を有して多数の燃料棒が並列された前記燃料集合体6に
対してTVカメラ4と反対側に照明装置本体8を位置す
る。この照明装置本体8は照度調節可能なランプ7を内
装する。そして、ポール9の下端に照明装置本体8を接
続し、そのポール9の上端に取付部12を設ける。
Here, the feature of the present invention is that the illumination device main body 8 is located on the side opposite to the TV camera 4 with respect to the fuel assembly 6 in which a large number of fuel rods are arranged in parallel with gaps between them. This lighting device main body 8 includes a lamp 7 whose illuminance can be adjusted. A lighting device main body 8 is connected to the lower end of the pole 9, and a mounting portion 12 is provided at the upper end of the pole 9.

この取付部12は、前記ガイドレール3の上方のプール
壁よりプール側に突出した操作架台10の手すり11の
側部に着脱自在に保持されるものである。そして、ラン
プ7にケーブルを介して連結された調光装置13を燃料
プール1の水の外に配置したものである。
This attachment part 12 is detachably held on the side of the handrail 11 of the operation stand 10 that protrudes from the pool wall above the guide rail 3 toward the pool side. A light control device 13 connected to the lamp 7 via a cable is placed outside the water in the fuel pool 1.

次に、本発明の好ましい実施態様は、前記ポール9の上
端に、そのポール9を軸線の回りに回動する照射角度調
節用のハンドル5を設ける。
Next, in a preferred embodiment of the present invention, a handle 5 for adjusting the irradiation angle is provided at the upper end of the pole 9 to rotate the pole 9 around its axis.

〔実  施  例〕〔Example〕

第1図は本装置の斜視略図であり、第2図はチャンネル
ボックス17が被覆された燃料集合体6の一部破断正面
図である。又、第3図は本装置の要部平面図であり、第
4図はその取付部12の側面図、第5図は同照明装置本
体8の一部破断正面図、第6図は枠部26の側面図、第
7図は第5図の■−■矢視断面図である。
FIG. 1 is a schematic perspective view of the present device, and FIG. 2 is a partially cutaway front view of a fuel assembly 6 covered with a channel box 17. 3 is a plan view of the main parts of this device, FIG. 4 is a side view of the mounting portion 12, FIG. 5 is a partially cutaway front view of the lighting device main body 8, and FIG. 6 is a frame portion. 26, and FIG. 7 is a sectional view taken along the line ■-■ in FIG. 5.

本装置は燃料プールlの水中に位置されるものであって
、チャンネル着脱機用ガイドレール3に隣接して、その
照明装置本体8が位置される。この照明装置本体8は枠
部26に支持され、該枠部26の上面がポール9に連結
されている。
This device is located underwater in the fuel pool 1, and its illumination device main body 8 is located adjacent to the guide rail 3 for the channel attachment/detachment machine. This lighting device main body 8 is supported by a frame portion 26, and the upper surface of the frame portion 26 is connected to the pole 9.

このポール9は複数のパイプからなり、その上下端が夫
々フランジにより連結されている。そして、ポール9の
最上部には取付部12が設けられ、該取付部12に取付
けられたフック14より手すり11に着脱自在に把持さ
れる。この手すり11はガイドレール3上方にあって、
側壁2の縁部からプールの内側に突設された操作架台1
0の縁部に沿って設けられている。この操作架台10の
平面中央部は口字状に欠切され、そこから燃料集合体を
燃料プールl内に出入自在に通し、その燃料集合体6を
チャンネル着脱機に支持させるものである。そして、そ
の着脱機の上下動によって取付部12を昇降すると共に
、取付部12外周に被覆されたチャンネルボックス17
 (第2図)を着脱できるものである。又、ポール9の
上端にはハンドル5が設けられ、それを回動することに
より照明装置本体8の正面をポール9の直線回りに回動
するようにしている。次に照明装置本体8は第5図及び
第7図の如く形成され、内部に2列の蛍光灯密封ケース
31が設けられ、夫々に蛍光灯よりなるランプ7が内装
される。又、照明装置本体8内部の下端には安定器32
が位置されている。更に照明装置本体8表面には乳白色
のプラスチックカバー30が設けられると共に、この表
面側に金網27が取付けられて面照明を行うものである
。又、照明装置本体8の上下両端は、その一部が夫々開
口し、該開口部に金yI27が設けられ、内部に水が出
入自在に流入できるようにしている。又、照明装置本体
8の上端はケーブル取出口29が開口する。このような
照明装置本体8は枠部26に軸28を介して第6図に示
す如く、その正面が重力方向に対し306の範囲で傾斜
するように構成している。
This pole 9 is made up of a plurality of pipes, the upper and lower ends of which are connected by flanges. A mounting portion 12 is provided at the top of the pole 9, and the pole 9 is detachably held by a handrail 11 via a hook 14 attached to the mounting portion 12. This handrail 11 is located above the guide rail 3,
An operation stand 1 protrudes from the edge of the side wall 2 into the pool
It is provided along the edge of 0. The central plane of the operating frame 10 is cut out in the shape of an opening, through which the fuel assembly can be passed into and out of the fuel pool 1, and the fuel assembly 6 is supported by a channel attachment/detachment machine. Then, the mounting part 12 is raised and lowered by the vertical movement of the mounting/detaching machine, and the channel box 17 covered on the outer periphery of the mounting part 12 is moved up and down.
(Fig. 2) can be attached and detached. Further, a handle 5 is provided at the upper end of the pole 9, and by rotating the handle 5, the front surface of the lighting device main body 8 can be rotated about the straight line of the pole 9. Next, the illumination device main body 8 is formed as shown in FIGS. 5 and 7, and two rows of fluorescent lamp sealed cases 31 are provided inside, and a lamp 7 made of a fluorescent lamp is housed in each case. In addition, a ballast 32 is provided at the lower end inside the lighting device main body 8.
is located. Further, a milky white plastic cover 30 is provided on the surface of the lighting device main body 8, and a wire mesh 27 is attached to this surface side to provide surface illumination. Further, both upper and lower ends of the lighting device main body 8 are partially opened, and gold YI27 is provided in the openings, so that water can freely flow in and out. Further, a cable outlet 29 is opened at the upper end of the lighting device main body 8. As shown in FIG. 6, the main body 8 of the illumination device 8 is connected to the frame 26 via a shaft 28, and is configured such that its front surface is inclined within a range of 306 degrees with respect to the direction of gravity.

〔作  用〕[For production]

次に、本装置の使用方法につき説明する。 Next, how to use this device will be explained.

先ず、第2図に示す燃料集合体6をチャンネル着脱機に
取付け、その外周に止着されたチャンネルボックス17
を取り除く。そして、第1図においで燃料集合体6の一
方の側面側にポール21を介してTV左カメラを吊り下
げ、ポール21の上端を操作架台10の一方の手すり1
1に保持させる。次に、下端に枠部26を介して照明装
置本体8を保持したポール9の上端を取付部12及びフ
ック14を介して第1図及び第4図に示す如く手すりI
Iに支持させる。そして、クランプ15により両者を固
定する。この取付部12は、ポール9の外周を回動自在
に保持すると共に、ボルト34の位置を変えることによ
り、ポール9の吊り下げ長さを調節し得る。又、ボール
9上端は安全のため落下防止ワイヤ16の端部が係止さ
れている。それと共に、ポール9上端にはハンドル5が
設けられ、ポール9をその軸線回りに回動し得るように
構成している。又、取付部12に並列し、調光装置13
がフック14を介して手すり11に取付けらでいる。そ
して、照明装置本体8の上端から導かれたケーブル22
がこの調光装置13に連結されていると共に、該調光装
置13が電源に接続されている。尚、照明装置本体8が
枠部26に取付けられる角度は、予め30°の範囲で任
意に設定されている。
First, the fuel assembly 6 shown in FIG.
remove. As shown in FIG.
Keep it at 1. Next, the upper end of the pole 9 holding the illumination device main body 8 through the frame part 26 at the lower end is attached to the handrail I as shown in FIGS. 1 and 4 through the mounting part 12 and the hook 14.
Let I support you. Then, both are fixed with a clamp 15. The attachment portion 12 rotatably holds the outer periphery of the pole 9, and by changing the position of the bolt 34, the hanging length of the pole 9 can be adjusted. Further, the end of a fall prevention wire 16 is locked to the upper end of the ball 9 for safety. At the same time, a handle 5 is provided at the upper end of the pole 9, so that the pole 9 can be rotated about its axis. Further, in parallel with the mounting part 12, a light control device 13 is installed.
is attached to the handrail 11 via a hook 14. A cable 22 led from the upper end of the lighting device main body 8
is connected to this dimmer 13, and the dimmer 13 is connected to a power source. Note that the angle at which the lighting device main body 8 is attached to the frame portion 26 is arbitrarily set in advance within a range of 30°.

このような状態でTV左カメラの一端に設けられた図示
しない撮像部を燃料集合体6に設ける。それと共に、照
明装置本体8の照射面をポール9の左側面に対向させる
。そして、TV左カメラからの映像をモニタTVで見な
がら照明装置本体8の照度を調節し、最も見易い明るさ
に調節すると共に、ポール9上端のハンドル5を回動さ
せて光の入射方向を調節する。そして、図示しないチャ
ンネル着脱機を#降させることにより、燃料集合体6を
上下方向に僅かずっ移動させる。そして、燃料集合体6
の各燃料棒35の間隔をTV左カメラを介して目視し、
その間隔が不均一でないことを確認するものである。
In this state, the fuel assembly 6 is provided with an imaging section (not shown) provided at one end of the TV left camera. At the same time, the irradiation surface of the illumination device main body 8 is made to face the left side surface of the pole 9. Then, while watching the image from the TV left camera on the monitor TV, adjust the illuminance of the lighting device main body 8 to the brightness that is most easily seen, and also adjust the direction of light incidence by rotating the handle 5 at the upper end of the pole 9. do. Then, by lowering the channel attachment/detachment machine (not shown), the fuel assembly 6 is moved slightly in the vertical direction. And fuel assembly 6
Visually check the spacing between each fuel rod 35 through the TV left camera,
This is to confirm that the intervals are not uneven.

尚、ある−本の燃料棒35が不良であったり、使用中に
原子炉内で不良になると、その被覆管が変形し、隣接す
る燃料棒35との隙間が不均一になる。従って、このよ
うな燃料集合体6は取り替えが必要となる。
If one fuel rod 35 is defective or becomes defective in the reactor during use, its cladding tube will be deformed and the gaps between adjacent fuel rods 35 will become uneven. Therefore, such a fuel assembly 6 needs to be replaced.

〔発明の効果〕〔Effect of the invention〕

本発明の装置は照明装置本体8がポール9により吊り下
げられ、該ポール9の上端部が操作架台10の手すり1
1に着脱自在に保持されるものであるため、取扱いが極
めて容易である。しかも、その照明装置本体8が燃料集
合体6に対しTV左カメラの反対側に位置され、該燃料
集合体6の裏側から光を照射できるため、各燃料棒35
の隙間を明確に検出することができる。それにより、変
形した不良燃料棒を確実に見つけることができる。しか
も、調光装置13より燃料プール1内での各種条件に応
じて照度を調節し、モニタ用TVカメラ4の最も見易い
状態を容易に作ることができる。
In the device of the present invention, a lighting device main body 8 is suspended from a pole 9, and the upper end of the pole 9 is attached to a handrail 1 of an operation stand 10.
1, it is extremely easy to handle. Moreover, the illumination device main body 8 is located on the opposite side of the TV left camera with respect to the fuel assembly 6, and since light can be irradiated from the back side of the fuel assembly 6, each fuel rod 35
gaps can be clearly detected. Thereby, deformed and defective fuel rods can be reliably found. Moreover, the illuminance can be adjusted by the light control device 13 according to various conditions within the fuel pool 1, and the monitor TV camera 4 can be easily seen in the most convenient condition.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本装置の斜視略図であり、第2図はチャンネル
ボックス17が被覆された燃料集合体6の一部破断正面
図である。又、第3図は本装置の要部平面図であり、第
4図はその取付部12の側面図、第5図は同照明装置本
体8の一部破断正面図、第6図は枠部26の側面図、第
7図は第5図の■−■矢視断面図である。 1・・・燃料プール     2・・・側壁3・・・ガ
イドレール    4・・・TVカメラ5・・・ハンド
ル      6・・・燃料集合体7・・・ランプ  
     8・・・照明装置本体9・・・ポール   
    10・・・操作架台1工・・・手すり    
   12・・・取付は部13・・・調光装置    
  14・・・フック15・・・クランプ      
16・・・落下防止ワイヤ17・・・チャンネルボック
ス 18・・・吊上げフック19・・・ベース    
   20・・・アーム21・・・カメラ用ポール  
 22・・・ケーブル23・・・スペース      
24・・・スリット25・・・蝶ネジ       2
6・・・枠部27・・・金y128・・・軸 29・・・ケーブル取出口   30・・・カバ°−3
1・・・蛍光灯密封ケース  32・・・安定器33・
・・ハンドル      34・・・ボルト35・・・
燃料棒
FIG. 1 is a schematic perspective view of the present device, and FIG. 2 is a partially cutaway front view of a fuel assembly 6 covered with a channel box 17. 3 is a plan view of the main parts of this device, FIG. 4 is a side view of the mounting portion 12, FIG. 5 is a partially cutaway front view of the lighting device main body 8, and FIG. 6 is a frame portion. 26, and FIG. 7 is a sectional view taken along the line ■-■ in FIG. 5. 1... Fuel pool 2... Side wall 3... Guide rail 4... TV camera 5... Handle 6... Fuel assembly 7... Lamp
8...Lighting device body 9...Pole
10...Operation stand 1 construction...Handrail
12... Installation is part 13... Light control device
14...Hook 15...Clamp
16... Fall prevention wire 17... Channel box 18... Lifting hook 19... Base
20...Arm 21...Camera pole
22...Cable 23...Space
24...Slit 25...Thumb screw 2
6... Frame 27... Gold Y128... Shaft 29... Cable outlet 30... Cover °-3
1... Fluorescent lamp sealed case 32... Ballast 33.
...Handle 34...Bolt 35...
fuel rod

Claims (1)

【特許請求の範囲】 1)燃料プール(1)の内側壁(2)に垂直に設けられ
たチャンネル着脱機用ガイドレール(3)の近傍にモニ
タ用TVカメラ(4)が位置され、前記着脱機に昇降自
在に載置された原子炉燃料集合体(6)を前記TVカメ
ラ(4)により検査する際に用いる検査用水中照明装置
において、互いに隙間を有して多数の燃料棒が並列され
た該前記燃料集合体(6)に対して前記TVカメラ(4
)と反対側に位置され、照度調節可能なランプ(7)を
内装した照明装置本体(8)と、該本体(8)に下端が
接続されるポール(9)と、該ポール(9)の上端部に
設けられ、前記ガイドレール(3)の上方のプール壁よ
りプール側に突出した操作架台(10)の手すり(11
)の側部に着脱自在に保持される取付け部(12)と、
前記ランプ(7)にケーブルを介して連結され該プール
(1)の水の外に位置される調光装置(13)と、を具
備することを特徴とする燃料集合体の検査用水中照明装
置。 2)前記ポール(9)の上端に、該ポール(9)をその
軸線の回りに回動する照射角度調節用のハンドル(5)
が設けられた特許請求の範囲第1項記載の装置。
[Claims] 1) A monitoring TV camera (4) is located near a guide rail (3) for the channel attachment/detachment machine, which is provided perpendicularly to the inner wall (2) of the fuel pool (1); In an underwater inspection lighting device used when inspecting a nuclear reactor fuel assembly (6) mounted on a machine so that it can be raised and lowered using the TV camera (4), a large number of fuel rods are arranged in parallel with gaps between them. The TV camera (4) is attached to the fuel assembly (6).
), a lighting device main body (8) containing a lamp (7) with adjustable illuminance, a pole (9) whose lower end is connected to the main body (8), and Handrails (11
) a mounting portion (12) detachably held on the side of the
An underwater lighting device for inspecting fuel assemblies, comprising: a dimmer (13) connected to the lamp (7) via a cable and located outside the water of the pool (1). . 2) A handle (5) for adjusting the irradiation angle that rotates the pole (9) around its axis at the upper end of the pole (9).
An apparatus according to claim 1, wherein the apparatus is provided with:
JP63140898A 1988-06-08 1988-06-08 Underwater lighting device for inspecting fuel assembly Pending JPH01311295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63140898A JPH01311295A (en) 1988-06-08 1988-06-08 Underwater lighting device for inspecting fuel assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63140898A JPH01311295A (en) 1988-06-08 1988-06-08 Underwater lighting device for inspecting fuel assembly

Publications (1)

Publication Number Publication Date
JPH01311295A true JPH01311295A (en) 1989-12-15

Family

ID=15279360

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63140898A Pending JPH01311295A (en) 1988-06-08 1988-06-08 Underwater lighting device for inspecting fuel assembly

Country Status (1)

Country Link
JP (1) JPH01311295A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000230995A (en) * 1999-02-12 2000-08-22 Hitachi Ltd Visual inspection device with underwater illuminator
JP2009085867A (en) * 2007-10-02 2009-04-23 Tokyo Electric Power Co Inc:The Handrail device in nuclear power plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000230995A (en) * 1999-02-12 2000-08-22 Hitachi Ltd Visual inspection device with underwater illuminator
JP2009085867A (en) * 2007-10-02 2009-04-23 Tokyo Electric Power Co Inc:The Handrail device in nuclear power plant

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