JPH0972988A - Underwater wall surface inspecting device - Google Patents
Underwater wall surface inspecting deviceInfo
- Publication number
- JPH0972988A JPH0972988A JP7226479A JP22647995A JPH0972988A JP H0972988 A JPH0972988 A JP H0972988A JP 7226479 A JP7226479 A JP 7226479A JP 22647995 A JP22647995 A JP 22647995A JP H0972988 A JPH0972988 A JP H0972988A
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- opening
- liner
- wall surface
- decompression
- 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
Links
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
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は水中における壁面の
検査、特に原子力プラントの燃料プールのライナ部の欠
陥検出に適した水中壁面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 an underwater wall surface inspection apparatus suitable for inspecting a wall surface in water, particularly for detecting a defect in a liner portion of a fuel pool of a nuclear power plant.
【０００２】[0002]
【従来の技術】図２は原子力プラントに設置されている
燃料プールの一例を示すもので、この燃料プールは、鉄
筋コンクリート構造のプール本体１の内底面２及び内側
壁３にステンレス鋼板よりなるライナ４を一体的に張設
した構造を備えており、ライナ４によって囲まれる空間
には、常時、水５が貯留されている。2. Description of the Related Art FIG. 2 shows an example of a fuel pool installed in a nuclear power plant. This fuel pool has a liner 4 made of stainless steel plate on an inner bottom surface 2 and an inner wall 3 of a pool body 1 having a reinforced concrete structure. Is integrally stretched, and water 5 is always stored in the space surrounded by the liner 4.
【０００３】このような燃料プールには、ライナ４の水
漏れを検知するための漏洩検知装置が設けられている。In such a fuel pool, there is provided a leak detection device for detecting a water leak in the liner 4.
【０００４】漏洩検知装置は、一端がプール本体１の内
底面２に張設されているライナ４の直下に位置し且つ他
端がプール本体１を貫通してプール本体１の下方に位置
するように設けられた複数の漏洩検出管６と、プール本
体１の下方に配置され且つ各漏洩検出管６の他端部が接
続された貯留槽７とを備えており、ライナ４に亀裂等の
損傷が生じた場合には、燃料プールに貯留されている水
５がライナ４の損傷部分よりプール本体１にしみ出して
漏洩検出管６に流入し、この漏洩した水５が貯留槽７に
貯留されるようになっている。The leak detection device has one end located directly below a liner 4 stretched on the inner bottom surface 2 of the pool body 1 and the other end penetrating the pool body 1 and located below the pool body 1. Is equipped with a plurality of leak detection pipes 6 and a storage tank 7 arranged below the pool body 1 and connected to the other end of each leak detection pipe 6, and the liner 4 is damaged by cracks or the like. In the case of occurrence of water, the water 5 stored in the fuel pool exudes from the damaged portion of the liner 4 into the pool body 1 and flows into the leak detection pipe 6, and the leaked water 5 is stored in the storage tank 7. It has become so.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、従来の
漏洩検出装置では、ライナ４に損傷が発生し且つ水の漏
洩が生じているか否かを検知することはできるが、ライ
ナの損傷部分を特定することができない。However, in the conventional leak detection device, it is possible to detect whether or not the liner 4 is damaged and water is leaked, but the damaged portion of the liner is specified. I can't.
【０００６】本発明は上述した実情に鑑みなしたもの
で、燃料プールのライナを各部分ごとに検査することが
可能な水中壁面検査装置を提供することを目的としてな
したものである。The present invention has been made in view of the above circumstances, and an object thereof is to provide an underwater wall surface inspection apparatus capable of inspecting a liner of a fuel pool for each part.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、本発明の請求項１に記載の水中壁面検査装置では、
一側側面に開口部を有し且つ満水状態の検査対象物の内
部へ挿入可能なチェンバーと、該チェンバーの開口部周
辺に設けられ且つ検査対象物の内面に水密に当接し得る
シール部材と、前記のチェンバーの内部に配置され且つ
開口部を視野に納め得る監視装置と、前記のチェンバー
に減圧配管を介して接続され且つ検査対象物の内面に開
口部のシール部材を当接させたチェンバーの内部を負圧
となし得る減圧手段とを備えている。In order to achieve the above object, the underwater wall surface inspection apparatus according to claim 1 of the present invention comprises:
A chamber having an opening on one side surface and capable of being inserted into the inspection target in a full-filled state, and a seal member provided around the opening of the chamber and capable of contacting the inner surface of the inspection target in a watertight manner, A monitoring device disposed inside the chamber and capable of keeping the opening in the field of view; and a chamber connected to the chamber via a decompression pipe and having a seal member of the opening abutting the inner surface of the inspection object. And a decompression means capable of making the inside a negative pressure.
【０００８】また、本発明の請求項２に記載の水中壁面
検査装置では、上記の請求項１に記載の水中壁面検査装
置において、減圧装置を検査対象物の外部に配置し、減
圧装置の吸引口とチェンバーの内部とを減圧配管を介し
て連通させている。Further, in the underwater wall surface inspection apparatus according to a second aspect of the present invention, in the underwater wall surface inspection apparatus according to the first aspect, the decompression device is arranged outside the object to be inspected, and the suction of the decompression device is performed. The mouth and the inside of the chamber are communicated with each other via a pressure reducing pipe.
【０００９】本発明の請求項１及び請求項２に記載の水
中壁面検査装置においては、満水状態の検査対象物の内
部へチェンバーを挿入し、該チェンバーの開口部を検査
対象物の内面に向けて当接させたのち、減圧装置を作動
させると、チェンバーが外部の水圧に押し付けられるた
め、前記開口部周辺に設けたシール部材の外周が検査対
象物の内面に密着しチェンバーの内部を負圧状態とす
る。In the underwater wall surface inspection apparatus according to the first and second aspects of the present invention, the chamber is inserted into the inspection object in a full state, and the opening of the chamber is directed toward the inner surface of the inspection object. When the decompressor is activated after the contact with the chamber, the chamber is pressed against the external water pressure, so the outer periphery of the seal member provided around the opening is in close contact with the inner surface of the inspection object and a negative pressure is applied inside the chamber. State.
【００１０】チェンバー内が負圧になると、検査対象物
の該チェンバーにより覆われている部分に亀裂等の欠陥
が生じていれば、検査対象物の外部からチェンバーの内
部へ空気が吸い込まれて気泡となり、その気泡が監視装
置を介して視認される。When the inside of the chamber becomes a negative pressure, if a defect such as a crack occurs in a portion of the inspection object covered by the chamber, air is sucked into the chamber from the outside of the inspection object and bubbles are generated. And the bubbles are visible through the monitoring device.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施の形態を、図
示例と共に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００１２】図１は本発明の水中壁面検査装置の実施の
形態の一例を示す断面図であり、図中、図２と同じもの
には同じ符号を付すことにより説明を省略する。FIG. 1 is a sectional view showing an example of an embodiment of the underwater wall surface inspection apparatus of the present invention. In the figure, the same parts as those in FIG.
【００１３】８はチェンバーであり、該チェンバー８
は、一側側面に開口部９を有する立方体状をなし、前記
の開口部９の外周には、所定の幅を有して開口部９の周
方向へ延びるフランジ１０を有し、後述の吊り上げ装置
１３によって吊り上げ、プール本体１のライナ４の内部
へ吊り降ろし得るように形成されている。Reference numeral 8 denotes a chamber, and the chamber 8
Has a cubic shape having an opening 9 on one side surface, and has a flange 10 having a predetermined width and extending in the circumferential direction of the opening 9 on the outer circumference of the opening 9, and is lifted to be described later. It is formed so that it can be hoisted by the device 13 and hoisted down inside the liner 4 of the pool body 1.
【００１４】また、前記のチェンバー８は、そのフラン
ジ１０面に、フランジ１０面に沿って開口部９の周方向
へ延び且つ横断面がＯ字形をなすシール部材１１が固着
されている。The chamber 8 has a seal member 11 fixed to the surface of the flange 10 extending in the circumferential direction of the opening 9 along the surface of the flange 10 and having an O-shaped cross section.
【００１５】１２はＣＣＤカメラであり、該ＣＣＤカメ
ラ１２は、チェンバー８の反開口部９側の壁面内側に開
口部９方向へ向けて固定され、開口部９全体をその視野
の中に納め得るようになっている。Reference numeral 12 denotes a CCD camera. The CCD camera 12 is fixed inside the wall surface of the chamber 8 on the side opposite to the opening 9 toward the opening 9, and the entire opening 9 can be accommodated within its field of view. It is like this.
【００１６】１３は吊り上げ装置であり、該吊り上げ装
置１３は、プール本体１の上部外周のフロア１４上をプ
ール本体１の上縁に沿って移動し得るように設けられて
おり、前記のチェンバー８をプール本体１の内部へ吊り
降ろし、該チェンバー８をプール本体１のライナ４の内
面に沿って上下左右へ移動させ得るように形成されてい
る。Reference numeral 13 denotes a hoisting device, and the hoisting device 13 is provided so as to be movable along the upper edge of the pool main body 1 on the floor 14 at the upper outer periphery of the pool main body 1, and the chamber 8 described above. Is hung inside the pool body 1, and the chamber 8 can be moved vertically and horizontally along the inner surface of the liner 4 of the pool body 1.
【００１７】１５は減圧装置であり、該減圧装置１５は
プール本体１の上部外周のフロア１４上に配置されてい
る。Reference numeral 15 is a decompression device, and the decompression device 15 is arranged on the floor 14 at the upper outer periphery of the pool body 1.
【００１８】この減圧装置１５の吸引口は、前記のチェ
ンバー８に屈曲性を有する減圧配管１６を介して接続さ
れており、該減圧装置１５を作動させると、プール本体
１のライナ４の内面に前記開口部９のシール部材１１を
当接させたチェンバー８の内部を負圧となし得るように
なっている。The suction port of the decompression device 15 is connected to the chamber 8 through a flexible decompression pipe 16, and when the decompression device 15 is operated, the inner surface of the liner 4 of the pool body 1 is connected. The inside of the chamber 8 with which the seal member 11 of the opening 9 is brought into contact can be made a negative pressure.
【００１９】１７はテレビモニタであり、該テレビモニ
タ１７は、フロア１４上に配置され且つ前記のＣＣＤカ
メラ１２に接続されており、該ＣＣＤカメラ１２が出力
する映像を表示するようになっている。Reference numeral 17 denotes a television monitor, which is arranged on the floor 14 and is connected to the CCD camera 12 so as to display an image output by the CCD camera 12. .
【００２０】吊り上げ装置１３により吊り上げたチェン
バー８を満水状態のプール本体１の内部へ吊り降ろし、
該チェンバー８の開口部９をプール本体１のライナ４内
面に向け、該開口部９に設けたシール部材１１をライナ
４内面に軽く抵触させたのち、減圧装置１５を作動させ
ると、減圧配管１６を通してチェンバー８内の水が吸引
されてチェンバー８の内部が減圧される。The chamber 8 hoisted by the hoisting device 13 is hoisted down into the pool body 1 which is full of water,
When the opening 9 of the chamber 8 is directed to the inner surface of the liner 4 of the pool body 1 and the seal member 11 provided in the opening 9 is lightly contacted with the inner surface of the liner 4, the depressurizing device 15 is actuated. Water in the chamber 8 is sucked through to reduce the pressure in the chamber 8.
【００２１】チェンバー８の内部が減圧されると、チェ
ンバー８は外部の水圧を受けてライナ４側へ押し付けら
れる結果、シール部材１１がライナ４の内面に密着しチ
ェンバー８の内部の負圧状態が維持される。When the pressure inside the chamber 8 is reduced, the chamber 8 is pressed against the liner 4 by the external water pressure. As a result, the seal member 11 is brought into close contact with the inner surface of the liner 4 and the negative pressure inside the chamber 8 is reduced. Maintained.
【００２２】このとき、ライナ４の該チェンバー８によ
り覆われている部分に亀裂等の欠陥が生じていれば、負
圧状態のチェンバー８の内部へライナ４の外部から前記
の欠陥を通して空気が吸い込まれ気泡１８が発生する。At this time, if a defect such as a crack is generated in the portion of the liner 4 covered by the chamber 8, air is sucked into the chamber 8 in the negative pressure state from the outside of the liner 4 through the defect. The bubbles 18 are generated.
【００２３】該気泡１８をＣＣＤカメラ１２がとらえ、
その映像をテレビモニタ１７へ出力する。そこで、テレ
ビモニタ１７を監視している作業者によってライナ４の
亀裂等の欠陥が視認される。The bubble 18 is captured by the CCD camera 12,
The video is output to the television monitor 17. Therefore, a defect such as a crack in the liner 4 is visually recognized by an operator who monitors the television monitor 17.
【００２４】図１に示す水中壁面検査装置では、内部を
負圧状態にできるチェンバー８を、燃料プールのライナ
４の内面に沿って順次移動させ、適宜にライナ４の内面
に吸着させることによって、ライナ４に亀裂等の欠陥が
あればチェンバー８の内部に空気が漏洩して気泡１８が
発生するように形成したので、燃料プールのライナ４を
各部分ごとに検査することが可能となる。In the underwater wall surface inspection apparatus shown in FIG. 1, the chamber 8 which can maintain a negative pressure inside is sequentially moved along the inner surface of the liner 4 of the fuel pool, and is appropriately adsorbed to the inner surface of the liner 4. If the liner 4 has a defect such as a crack, the air is leaked into the chamber 8 to generate the bubbles 18. Therefore, the liner 4 of the fuel pool can be inspected for each part.
【００２５】また、減圧装置１５をフロア１４に配置
し、減圧装置１５とチェンバー８とを減圧配管１６を介
して接続しているので、チェンバー８の軽量化が図れ
て、吊り上げ装置１３の負担荷重を軽減することができ
る。Since the decompression device 15 is arranged on the floor 14 and the decompression device 15 and the chamber 8 are connected through the decompression pipe 16, the weight of the chamber 8 can be reduced and the load of the lifting device 13 can be reduced. Can be reduced.
【００２６】なお、本発明の水中壁面検査装置は上述し
た実施の形態にのみ限定されるものではなく、本発明の
要旨を逸脱しない範囲内において種々変更を加え得るこ
とは勿論である。The underwater wall surface inspection apparatus of the present invention is not limited to the above-described embodiment, and it goes without saying that various changes can be made without departing from the scope of the present invention.
【００２７】[0027]
【発明の効果】以上述べたように、本発明の水中壁面検
査装置によれば下記のような種々の優れた効果を奏し得
る。As described above, according to the underwater wall surface inspection apparatus of the present invention, the following various excellent effects can be obtained.
【００２８】（１）本発明の請求項１及び請求項２に記
載の水中壁面検査装置においては、検査対象物に密着可
能なチェンバーの内部を減圧手段によって減圧するの
で、常時、満水状態で外部から欠陥の検出が不可能な検
査対象物の欠陥箇所の検出を各部分ごとに容易に実施す
ることができる。(1) In the underwater wall surface inspection apparatus according to the first and second aspects of the present invention, since the inside of the chamber that can be brought into close contact with the object to be inspected is decompressed by the decompression means, it is always full and outside. Therefore, it is possible to easily detect the defective portion of the inspection object in which the defect cannot be detected for each portion.
【００２９】（２）本発明の請求項２に記載の水中壁面
検査装置においては、減圧装置を検査対象物の外部に配
置した減圧装置の吸引口とチェンバーの内部とを、減圧
配管を介して連通させているので、チェンバーの軽量化
が図れて、該チェンバーを昇降させる吊り上げ装置の負
担荷重を軽減することができる。(2) In the underwater wall surface inspection apparatus according to the second aspect of the present invention, the suction port of the decompression device in which the decompression device is arranged outside the inspection object and the inside of the chamber are connected via a decompression pipe. Since they are communicated with each other, the weight of the chamber can be reduced, and the load on the lifting device for raising and lowering the chamber can be reduced.
【図１】本発明の水中壁面検査装置の実施の形態の一例
を示す断面図である。FIG. 1 is a sectional view showing an example of an embodiment of an underwater wall surface inspection apparatus of the present invention.
【図２】原子力プラントに設置されている燃料プールの
一例を示す断面図である。FIG. 2 is a cross-sectional view showing an example of a fuel pool installed in a nuclear power plant.
１ プール本体 ４ ライナ（検査対象物） ８ チェンバー ９ 開口部 １１ シール部材 １２ ＣＣＤカメラ（監視装置） １５ 減圧装置 １６ 減圧配管 1 pool body 4 liner (inspection object) 8 chamber 9 opening 11 seal member 12 CCD camera (monitoring device) 15 decompression device 16 decompression pipe
Claims (2)
検査対象物の内部へ挿入可能なチェンバーと、該チェン
バーの開口部周辺に設けられ且つ検査対象物の内面に水
密に当接し得るシール部材と、前記のチェンバーの内部
に配置され且つ開口部を視野に納め得る監視装置と、前
記のチェンバーに減圧配管を介して接続され且つ検査対
象物の内面に開口部のシール部材を当接させたチェンバ
ーの内部を負圧となし得る減圧装置とを備えたことを特
徴とする水中壁面検査装置。1. A chamber having an opening on one side surface and capable of being inserted into an object to be inspected in a water-filled state, and a chamber provided around the opening of the chamber and contacting an inner surface of the object to be inspected in a watertight manner. A sealing member to be obtained, a monitoring device arranged inside the chamber and capable of keeping the opening in the field of view, a sealing member connected to the chamber via a decompression pipe, and the sealing member of the opening to the inner surface of the inspection object. An underwater wall surface inspection apparatus comprising a decompression device capable of forming a negative pressure inside the chambers that are in contact with each other.
減圧装置の吸引口とチェンバーの内部とを減圧配管を介
して連通させた請求項１に記載の水中壁面検査装置。2. A decompression device is arranged outside the inspection object,
The underwater wall surface inspection apparatus according to claim 1, wherein the suction port of the decompression device and the inside of the chamber are communicated with each other via a decompression pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7226479A JPH0972988A (en) | 1995-09-04 | 1995-09-04 | Underwater wall surface inspecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7226479A JPH0972988A (en) | 1995-09-04 | 1995-09-04 | Underwater wall surface inspecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0972988A true JPH0972988A (en) | 1997-03-18 |
Family
ID=16845753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7226479A Pending JPH0972988A (en) | 1995-09-04 | 1995-09-04 | Underwater wall surface inspecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0972988A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005030764A (en) * | 2003-07-07 | 2005-02-03 | Hitachi Ltd | Underwater inspection device |
| KR100538352B1 (en) * | 2002-08-22 | 2005-12-23 | 박명숙 | A photographing apparatus for underwater structure |
| JP2020066241A (en) * | 2018-10-22 | 2020-04-30 | 株式会社アミューザジャパン | Submarine |
| CN112466489A (en) * | 2020-11-17 | 2021-03-09 | 中广核工程有限公司 | Automatic positioning and defect detecting system and method for spent fuel storage grillwork of nuclear power station |
-
1995
- 1995-09-04 JP JP7226479A patent/JPH0972988A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100538352B1 (en) * | 2002-08-22 | 2005-12-23 | 박명숙 | A photographing apparatus for underwater structure |
| JP2005030764A (en) * | 2003-07-07 | 2005-02-03 | Hitachi Ltd | Underwater inspection device |
| JP2020066241A (en) * | 2018-10-22 | 2020-04-30 | 株式会社アミューザジャパン | Submarine |
| CN112466489A (en) * | 2020-11-17 | 2021-03-09 | 中广核工程有限公司 | Automatic positioning and defect detecting system and method for spent fuel storage grillwork of nuclear power station |
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