JP4352255B2 - Underwater inspection device and underwater inspection method - Google Patents

Underwater inspection device and underwater inspection method Download PDF

Info

Publication number
JP4352255B2
JP4352255B2 JP2004309461A JP2004309461A JP4352255B2 JP 4352255 B2 JP4352255 B2 JP 4352255B2 JP 2004309461 A JP2004309461 A JP 2004309461A JP 2004309461 A JP2004309461 A JP 2004309461A JP 4352255 B2 JP4352255 B2 JP 4352255B2
Authority
JP
Japan
Prior art keywords
inspection
box
water
underwater
negative pressure
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.)
Active
Application number
JP2004309461A
Other languages
Japanese (ja)
Other versions
JP2006119080A (en
Inventor
博文 川崎
茂 南波
敏弘 大塚
通 瀬谷
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.)
Hitachi GE Nuclear Energy Ltd
Original Assignee
Hitachi GE Nuclear Energy 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 Hitachi GE Nuclear Energy Ltd filed Critical Hitachi GE Nuclear Energy Ltd
Priority to JP2004309461A priority Critical patent/JP4352255B2/en
Publication of JP2006119080A publication Critical patent/JP2006119080A/en
Application granted granted Critical
Publication of JP4352255B2 publication Critical patent/JP4352255B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/52—Tools specially adapted for working underwater, not otherwise provided for

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Examining Or Testing Airtightness (AREA)

Description

本発明は、原子力発電所および使用済み燃料再処理施設などの内張り容器の状態を貯水状態で検査する水中検査装置および水中検査方法に関する。   The present invention relates to an underwater inspection apparatus and an underwater inspection method for inspecting the state of a lining container such as a nuclear power plant and a spent fuel reprocessing facility in a water storage state.

構造物の表面に生じた亀裂などの欠陥を検出する際に、その内部に汚れがあると、正確な検出結果が得られない。   When a defect such as a crack generated on the surface of the structure is detected, if there is dirt inside the structure, an accurate detection result cannot be obtained.

従来の水中検査装置としては、１０ｍ以上の水深で検査箱を大気開放状態にするために、圧縮空気を駆動流体とするジェットポンプで検査箱内の水を吸引し、このジェットポンプ出口には排水チューブを取付け、ジェットポンプから噴出される気泡を利用し、排水チューブを介して水面上に揚水させ局所排水していた。その後に、真空ポンプを用いて検査箱内の大気を吸引し負圧状態を保ち、誘導加熱コイルを用いて欠陥内部まで乾燥させる大がかりな装置が提案されている(例えば、特許文献１参照)。   As a conventional underwater inspection device, in order to open the inspection box to the atmosphere at a depth of 10 m or more, water in the inspection box is sucked with a jet pump using compressed air as a driving fluid, and the water is discharged to the jet pump outlet. A tube was attached, and bubbles were ejected from the jet pump and pumped to the surface of the water through a drainage tube for local drainage. After that, a large-scale apparatus has been proposed in which the atmosphere in the inspection box is sucked using a vacuum pump to maintain a negative pressure state and is dried to the inside of the defect using an induction heating coil (see, for example, Patent Document 1).

また、作業員が水中に潜り、検査対象部に簡易な覆いをかぶせ、覆いの中で超音波振動子により検査対象部を洗浄し、浸透液を検査対象部に注入し、覆いを取外し、現像剤を含んだパテを検査対象部に押し当てて接触させ、パテをはがし、欠陥状態を観察する水中浸透探傷検査方法が提案されている(例えば、特許文献２参照)。   In addition, an operator dives into the water, covers the inspection target part with a simple cover, cleans the inspection target part with an ultrasonic vibrator in the cover, injects permeate into the inspection target part, removes the cover, and develops. An underwater penetrant inspection method has been proposed in which a putty containing an agent is pressed against and contacted with an inspection target part, the putty is peeled off, and a defect state is observed (for example, see Patent Document 2).

特開平９−２１８１６７号公報(第４〜５頁 図１，図２)Japanese Laid-Open Patent Publication No. 9-218167 (Pages 4-5, FIGS. 1 and 2) 特開平８−１２８９９５号公報(第３〜５頁 図１〜図８)JP-A-8-128995 (pages 3-5, FIGS. 1-8)

特許文献１の水中検査装置は、ジェットポンプや誘導加熱コイルを用意しなければならず、装置構成が大がかりであり、検査対象部を乾燥させる必要もあり、検査に長時間を要していた。   The underwater inspection apparatus of Patent Document 1 must prepare a jet pump and an induction heating coil, and the apparatus configuration is large, the inspection target portion needs to be dried, and the inspection requires a long time.

特許文献１の水中浸透探傷検査方法では、作業員が水中に潜っている。例えば、原子力発電所および使用済み燃料再処理施設などにおいて、中性子を吸収し遮断する水中とはいえ、作業員が水中に潜る作業は、作業員の安全上、できるだけ避けたいことである。   In the underwater penetrant inspection method of Patent Document 1, an operator is submerged in water. For example, in a nuclear power plant and a spent fuel reprocessing facility, it is desirable to avoid an operation where an operator dives in the water as much as possible for the safety of the operator, even though the water absorbs and blocks neutrons.

本発明の課題は、水中の内張りの母材および溶接部などの貫通欠陥が目詰まりしていても、作業員が潜水することなく、欠陥の目詰まりを確実に除去する手段を備えた内容積の小さい検査箱で水中検査を実施することである。   An object of the present invention is to provide an internal volume having means for reliably removing clogging of a defect without diving the operator even if a penetration defect such as a base material of a lining in water and a welded portion are clogged. Underwater inspection in a small inspection box.

本発明は、前記課題を解決するために、内部に超音波振動子を収納し開口端面にシールパッキンを有する検査箱を検査対象部に載せ、検査箱の内部を負圧にするとともに検査箱の内部水を超音波振動子が露出しない状態まで排水し、検査箱の内部水から露出しない状態で超音波振動子を駆動し検査対象部を洗浄し、洗浄中に生ずる気泡により検査対象部の洗浄完了を検知し、洗浄した検査対象部の欠陥を検査する水中検査装置および水中検査方法を提案する。   In order to solve the above-mentioned problem, the present invention places an inspection box containing an ultrasonic transducer inside and having a seal packing on the opening end surface on an inspection target part, and makes the inside of the inspection box have a negative pressure and Drain the internal water until the ultrasonic transducer is not exposed, drive the ultrasonic transducer without exposing it from the internal water of the inspection box to clean the inspection target, and clean the inspection target with air bubbles generated during cleaning An underwater inspection device and an underwater inspection method for detecting completion and inspecting a defect of a cleaned inspection target part are proposed.

本発明によれば、水深１０ｍ以上の水中であっても検査箱を容易に設置でき、水噴射エゼクタによる簡易な局所排水手段を用いて、超音波振動子を水没させた状態で、検査箱内部を排水して検査箱を維持し、超音波洗浄し、内張り容器の溶接部などに生じた欠陥の目詰まりを容易に除去し、溶接部の貫通欠陥などを検出できる。   According to the present invention, the inspection box can be easily installed even under water at a depth of 10 m or more, and the ultrasonic vibrator is submerged in a state where the ultrasonic vibrator is submerged using a simple local drainage means using a water jet ejector. The inspection box is maintained by draining, ultrasonic cleaning, clogging of defects generated in the welded portion of the lining container and the like can be easily removed, and the penetration defect of the welded portion can be detected.

次に、図１〜図５を参照しながら、本発明による水中検査装置の実施例を説明する。ここでは、使用済み燃料貯蔵プールの水中にある内張りの溶接部のシール性能を検査する場合を例として本発明を説明する。   Next, an embodiment of the underwater inspection apparatus according to the present invention will be described with reference to FIGS. Here, the present invention will be described by taking as an example the case of inspecting the sealing performance of the welded portion of the lining in the spent fuel storage pool.

図１は、本発明による水中検査装置の一実施例の構成を示す系統図である。   FIG. 1 is a system diagram showing the configuration of an embodiment of the underwater inspection apparatus according to the present invention.

本実施例の水中検査装置は、大きく分けて、一端が開口され他は密閉され超音波振動子７６収納する検査箱１と、負圧発生装置１１と、水噴射エゼクタ２９とからなる。   The underwater inspection apparatus of the present embodiment is roughly divided into an inspection box 1 in which one end is opened and the other is sealed and accommodated in the ultrasonic vibrator 76, a negative pressure generator 11, and a water ejection ejector 29.

検査箱１は、開口されている端面にシールパッキンを備え、負圧ライン２に接続されるとともに、下側に超音波振動子７６を収納している。超音波振動子７６は、超音波発振機７７により駆動される。   The inspection box 1 is provided with a seal packing on the open end face, is connected to the negative pressure line 2, and houses an ultrasonic transducer 76 on the lower side. The ultrasonic vibrator 76 is driven by an ultrasonic oscillator 77.

検査箱１には、撮像手段として水中テレビカメラ３２が搭載され、撮像した画像は、テレビモニタ３８で観測できる。   The examination box 1 is equipped with an underwater television camera 32 as an imaging means, and the captured image can be observed on a television monitor 38.

負圧発生装置１１は、負圧ライン２を介して、検査箱１内に負圧を供給するとともに、水源７４からの給水を用いて、高圧供給水ポンプ１７により、水噴射エゼクタ２９を駆動する。   The negative pressure generator 11 supplies negative pressure into the examination box 1 via the negative pressure line 2, and drives the water injection ejector 29 by the high pressure supply water pump 17 using the water supplied from the water source 74. .

負圧発生装置１１は、負圧ライン２側に負圧圧力計３１と圧力計バルブ１７とベントバルブ１６と接続カプラ１２とを備え、給水ライン６側に接続カプラ１４と流量計３５と給水量調整バルブ１８と給水分岐ホース７１と給水圧力計３６を備えている。   The negative pressure generator 11 includes a negative pressure pressure gauge 31, a pressure gauge valve 17, a vent valve 16, and a connection coupler 12 on the negative pressure line 2 side, and a connection coupler 14, a flow meter 35, and a water supply amount on the water supply line 6 side. An adjustment valve 18, a water supply branch hose 71, and a water supply pressure gauge 36 are provided.

負圧発生装置１１は、供給ライン２０側に高圧供給水ポンプ２７と供給水元側バルブ２４と接続カプラ２１，２３とホース２２とを備え、呼び水ライン２５側に呼び水バルブ２６と接続カプラ２８とを備え、給水ドレンライン７２側にドレンバルブ１５と接続カプラ２８とを備え、検査箱内給水ライン７３側に給水バルブ１９と接続カプラ２８とを備えている。   The negative pressure generator 11 includes a high pressure feed water pump 27, a feed water source side valve 24, connection couplers 21 and 23, and a hose 22 on the supply line 20 side, and a priming water valve 26 and a connection coupler 28 on the priming line 25 side. The drain valve 15 and the connection coupler 28 are provided on the water supply drain line 72 side, and the water supply valve 19 and the connection coupler 28 are provided on the inspection box water supply line 73 side.

一方、検査対象部は、コンクリート躯体６７の内側に密着して置かれた複数の内張り３０である。隣合う内張り３０を溶接し、内部の水が内張り３０の外側に漏れ出さないようになっている。隣合う内張り３０を溶接している溶接線６３のコンクリート躯体６７側には漏洩検知溝６８が設けられ、溶接線６３の溶接に貫通欠陥が万が一生じた場合に、しみ出した水は漏洩検知溝６８から漏洩検出系３３のフローグラス３４に溜まるので、貫通欠陥が生じていることが判明するようになっている。   On the other hand, the inspection target portion is a plurality of linings 30 placed in close contact with the inside of the concrete housing 67. Adjacent linings 30 are welded so that water inside does not leak out of the lining 30. A leakage detection groove 68 is provided on the side of the concrete casing 67 of the welding line 63 that welds the adjacent lining 30. In the unlikely event that a penetration defect occurs in the welding of the welding line 63, the leaked water will leak into the leakage detection groove 68. Since 68 accumulates in the flow glass 34 of the leakage detection system 33, it is found that a penetration defect has occurred.

次に、本発明の水中検査装置のより詳細な構造を説明する。   Next, a more detailed structure of the underwater inspection apparatus of the present invention will be described.

図２は、本発明による(一窓形)水中検査装置の構造をより詳細に示す側断面図であり、図３は、本発明による(一窓形)水中検査装置の構造をより詳細に示す正面図であり、図４は、本発明による(一窓形)水中検査装置の構造をより詳細に示す裏面図である。   FIG. 2 is a side sectional view showing the structure of the (single window type) underwater inspection apparatus according to the present invention in more detail, and FIG. 3 shows the structure of the (single window type) underwater inspection apparatus according to the present invention in more detail. FIG. 4 is a front view, and FIG. 4 is a back view showing the structure of the (single window type) underwater inspection apparatus according to the present invention in more detail.

検査箱１の開口端面とは反対側の面に検査箱１内部を視認できる透明なアクリル板などからなる密閉窓４９と、密閉窓４９の近傍にテレビカメラと照明灯からなる水中カメラ３２のユニットとを備えている。検査箱１の密閉窓４９の近傍に沿ってスライドガイド５５を備え、スライドガイド５５にスライダ６０を取付け、スライダ６０にはカメラホルダ５６を取付け、カメラホルダ５６にはカメラ３０を取付け、カメラホルダ５６には操作ロープ５９を備えている。   A unit of a sealed window 49 made of a transparent acrylic plate or the like that allows the inside of the examination box 1 to be visually recognized on the surface opposite to the opening end face of the examination box 1, and an underwater camera 32 unit comprising a TV camera and an illumination lamp in the vicinity of the sealed window 49. And has. A slide guide 55 is provided along the vicinity of the sealed window 49 of the examination box 1, a slider 60 is attached to the slide guide 55, a camera holder 56 is attached to the slider 60, and a camera 30 is attached to the camera holder 56. Is provided with an operation rope 59.

検査箱１の内部には、開口端面４５の反対側に超音波振動子７６が固定されている。超音波振動子７６には接続ケーブル７８が接続され、検査箱１の開口端面４５側で反対面の上部は、検査箱１の内部監視用の透明アクリル板４９が密閉窓として設けられている。   An ultrasonic transducer 76 is fixed inside the inspection box 1 on the side opposite to the opening end face 45. A connection cable 78 is connected to the ultrasonic transducer 76, and a transparent acrylic plate 49 for monitoring the inside of the examination box 1 is provided as a sealed window on the opposite side of the opening end face 45 side of the examination box 1.

検査箱１は、その筐体に取付けられた取扱いトング３９により支持され、取扱いトング３９は、プール水４１よりも上方に出ており、検査者または取扱い機具により固定される。   The inspection box 1 is supported by a handling tong 39 attached to the casing, and the handling tong 39 protrudes above the pool water 41 and is fixed by an inspector or a handling machine.

検査箱１の下部側には、水噴射エゼクタ２９と検査箱１とを連結する穴６４およびエゼクタ接続配管５３が設置されている。水噴射エゼクタ２９は、エゼクタ取付け金具５４で検査箱１に固定され、給水ライン６を介して負圧発生装置１１と接続されている。   On the lower side of the inspection box 1, a hole 64 for connecting the water jet ejector 29 and the inspection box 1 and an ejector connection pipe 53 are installed. The water jet ejector 29 is fixed to the inspection box 1 by an ejector mounting bracket 54 and is connected to the negative pressure generator 11 through the water supply line 6.

図５は、図１の検査箱１により貫通欠陥部のシール性能を検査している状態を示す斜視図である。図５の状態は、検査箱１から水を完全に排出していない状態、すなわち、超音波振動子が水没した状態を示している。   FIG. 5 is a perspective view showing a state in which the sealing performance of the penetration defect portion is inspected by the inspection box 1 of FIG. The state of FIG. 5 shows a state where water is not completely discharged from the examination box 1, that is, a state where the ultrasonic transducer is submerged.

この状態では、水噴射エゼクタ２９からジェット水流が出される際に負圧が発生し、検査箱１中の水がエゼクタ接続配管５３から吸い出され、検査箱１の内部に負圧が発生し、検査箱１は、内張り３０が接合している溶接線６３上にパッキン４６により密着し、シールする。   In this state, a negative pressure is generated when the jet water flow is discharged from the water ejecting ejector 29, the water in the inspection box 1 is sucked out from the ejector connection pipe 53, and a negative pressure is generated inside the inspection box 1, The inspection box 1 is tightly adhered to the weld line 63 to which the lining 30 is joined by the packing 46 and sealed.

次に、本発明の水中検査装置によりシール性能を検査する手順を説明する。   Next, a procedure for inspecting the sealing performance with the underwater inspection apparatus of the present invention will be described.

手順１：準備作業
水中検査装置の検査箱１の負圧ライン２側でホース３の接続カプラ４を検査箱１側の接続カプラ５に接続する。ホース８の接続カプラ９を検査箱１の給水ライン６側の接続カプラ７に接続する。検査箱１を水中内張り３０の壁面の検査対象部に設定する。 Procedure 1: Preparatory work The connecting coupler 4 of the hose 3 is connected to the connecting coupler 5 on the inspection box 1 side on the negative pressure line 2 side of the inspection box 1 of the underwater inspection apparatus. The connecting coupler 9 of the hose 8 is connected to the connecting coupler 7 on the water supply line 6 side of the inspection box 1. The inspection box 1 is set as the inspection target portion of the wall surface of the underwater lining 30.

検査箱１に接続した負圧ライン２側でホース３の接続カプラ１０を負圧発生装置１１側の接続カプラ１２に接続する。検査箱１に接続した給水ライン６側でホース８の接続カプラ１３を負圧発生装置１１側の接続カプラ１４に接続する。   The connecting coupler 10 of the hose 3 is connected to the connecting coupler 12 on the negative pressure generator 11 side on the negative pressure line 2 side connected to the inspection box 1. The connecting coupler 13 of the hose 8 is connected to the connecting coupler 14 on the negative pressure generator 11 side on the water supply line 6 side connected to the inspection box 1.

負圧発生装置１１の給水ライン６側のドレンバルブ１５を閉じ、負圧ライン２側のベントバルブ１６を閉じ、負圧ライン２側の圧力計バルブ１７を開き、給水ライン６側の給水量調整バルブ１８を閉じ、給水ライン６側の検査箱内給水バルブ１９を閉じ、ホース２２の接続カプラ２３を供給ライン２０側の接続カプラ２１に接続し、ホース２２を水源７４にセットし、供給水元側バルブ２４を開き、呼び水ライン２５側の呼び水バルブ２６を閉じ、高圧給水ポンプ２７を起動する。   The drain valve 15 on the water supply line 6 side of the negative pressure generator 11 is closed, the vent valve 16 on the negative pressure line 2 side is closed, the pressure gauge valve 17 on the negative pressure line 2 side is opened, and the amount of water supply on the water supply line 6 side is adjusted. Close the valve 18, close the water supply valve 19 in the inspection box on the water supply line 6 side, connect the connection coupler 23 of the hose 22 to the connection coupler 21 on the supply line 20 side, set the hose 22 to the water source 74, and supply water source The side valve 24 is opened, the priming valve 26 on the priming line 25 side is closed, and the high-pressure feed pump 27 is activated.

手順２：負圧ライン２側のエア抜き
次に、負圧ライン２側のエアを抜く。負圧ライン２側のホース３にある接続カプラ１０を取外し、給水ライン６側の接続カプラ２８に接続し、給水ライン６側の検査箱内給水バルブ１９を開いて、検査箱１内部のエアを抜く。エア抜き完了後、給水ライン６側の検査箱内給水バルブ１９を閉じ、ホース３の接続カプラ１０を取外し、ホース３の接続カプラ１０を負圧ライン２側の接続カプラ１２に接続する。 Procedure 2: Air release on the negative pressure line 2 side Next, air on the negative pressure line 2 side is released. The connecting coupler 10 on the hose 3 on the negative pressure line 2 side is removed, connected to the connecting coupler 28 on the water supply line 6 side, the water supply valve 19 in the inspection box on the water supply line 6 side is opened, and the air inside the inspection box 1 is removed. Unplug. After completion of air bleeding, the water supply valve 19 in the inspection box on the water supply line 6 side is closed, the connection coupler 10 of the hose 3 is removed, and the connection coupler 10 of the hose 3 is connected to the connection coupler 12 on the negative pressure line 2 side.

手順３：検査
次に、水中で検査する。負圧ライン２側のベントバルブ１６を閉じ、給水ライン６側の給水量調整バルブ１８を開き、水噴射エゼクタ２９に給水すると、検査箱１内部の水が吸引され、検査箱１内部が負圧状態になり、検査箱１が水中の内張り３０の壁面に密着する。 Procedure 3: Inspection Next, inspect underwater. When the vent valve 16 on the negative pressure line 2 side is closed, the water supply adjustment valve 18 on the water supply line 6 side is opened, and the water injection ejector 29 is supplied with water, the water inside the inspection box 1 is sucked and the inside of the inspection box 1 is negative pressure The inspection box 1 comes into close contact with the wall surface of the underwater lining 30.

検査箱１内部の負圧状態は、負圧発生装置１１の負圧圧力計３１で確認し、水中テレビカメラ３２と接続したテレビモニタ３８で検査箱１内部の内部水４２の状態を確認する。   The negative pressure state inside the examination box 1 is confirmed by the negative pressure gauge 31 of the negative pressure generator 11, and the state of the internal water 42 inside the examination box 1 is confirmed by the television monitor 38 connected to the underwater television camera 32.

次に、高圧供給水ポンプ２７を継続運転しながら、負圧ライン２側のベントバルブ１６を少し開き検査箱１の内部水４２を排水する。この時、水位低下をテレビモニタ３８で確認しながら、検査箱１内の内部水４２を排水する。検査箱１内の超音波振動子７６が露出しない状態まで排水し、ベントバルブ１６を閉じ、検査箱１を保持する。   Next, while continuously operating the high-pressure feed water pump 27, the vent valve 16 on the negative pressure line 2 side is slightly opened to drain the internal water 42 of the inspection box 1. At this time, the internal water 42 in the examination box 1 is drained while confirming the drop in water level on the television monitor 38. The ultrasonic transducer 76 in the examination box 1 is drained until it is not exposed, the vent valve 16 is closed, and the examination box 1 is held.

検査箱１を設置した内張り３０の壁面で目詰まり状態の溶接部貫通欠陥４０の有無を検査するため、超音波発振機７７の電源スイッチを入れ、検査箱１を設置した内張り３０の溶接部貫通欠陥４０部分を超音波で洗浄すると、溶接部貫通欠陥４０部分の目詰まりが解消され、内張り３０の溶接部貫通欠陥４０から検査箱１内の内部水４２中に気泡４３が発生するので、この気泡４３をテレビモニタ３８で確認し、洗浄完了と判断できる。   In order to inspect the presence or absence of a clogged weld penetration defect 40 on the wall surface of the lining 30 where the inspection box 1 is installed, the ultrasonic oscillator 77 is turned on, and the welding portion of the lining 30 where the inspection box 1 is installed penetrates the weld. When the defect 40 portion is cleaned with ultrasonic waves, clogging of the weld portion penetration defect 40 portion is eliminated, and bubbles 43 are generated in the internal water 42 in the inspection box 1 from the weld portion penetration defect 40 of the lining 30. The bubble 43 is confirmed on the television monitor 38, and it can be determined that the cleaning is completed.

すなわち、検査箱１の内部に設けた超音波振動子７６により、溶接線６３で目詰まり状態の溶接部の貫通欠陥４０を超音波洗浄すると、溶接部の貫通欠陥４０の目詰まりが解消され、内張り３０の溶接部の貫通欠陥４０から検査箱１の内部水４２中に気泡４３が発生することをテレビモニタ３８で確認し、洗浄完了と判断できる。   That is, when the ultrasonic transducer 76 provided inside the inspection box 1 ultrasonically cleans the penetration defect 40 of the welded portion clogged with the weld line 63, the clogging of the penetration defect 40 of the welded portion is eliminated, It can be determined that the cleaning is completed by confirming on the TV monitor 38 that bubbles 43 are generated in the internal water 42 of the inspection box 1 from the penetration defect 40 in the welded portion of the lining 30.

手順４：検査箱１の開放
次に、検査箱１を開放する。給水ドレンライン７２側のドレンバルブ１５を閉じ、給水ライン６側の給水量調整バルブ１８を閉じ、負圧ライン２側でホース３の接続カプラ１０を負圧ライン２側の接続カプラ１２から取外し、負圧ライン２側でホース３の接続カプラ１０を検査箱内給水ライン７３の接続カプラ２８に接続し、検査箱内給水バルブ１９を開き、検査箱１内に注水する。検査箱１が内張り３０の壁面から離れたら、高圧供給水ポンプ２７を停止させ、前記準備作業の逆手順で、配管や装置類を回収する。 Procedure 4: Opening the inspection box 1 Next, the inspection box 1 is opened. Close the drain valve 15 on the water supply drain line 72 side, close the water supply amount adjustment valve 18 on the water supply line 6 side, remove the connection coupler 10 of the hose 3 from the connection coupler 12 on the negative pressure line 2 side on the negative pressure line 2 side, On the negative pressure line 2 side, the connection coupler 10 of the hose 3 is connected to the connection coupler 28 of the water supply line 73 in the inspection box, the water supply valve 19 in the inspection box is opened, and water is injected into the inspection box 1. When the inspection box 1 is separated from the wall surface of the lining 30, the high-pressure feed water pump 27 is stopped, and the pipes and devices are collected in the reverse procedure of the preparatory work.

手順５：漏洩検出系による漏洩水の確認
なお、手順４：検査箱１の開放後に、内張り容器６６に設けている漏洩検出系３３のフローグラス３４で漏洩水を確認すると、検査箱１を設置した溶接部における貫通欠陥４０の目詰まりが解消されたことを判断できる。 Procedure 5: Confirmation of leaked water by leak detection system Note 4: After the inspection box 1 is opened, if the leak water is confirmed by the flow glass 34 of the leak detection system 33 provided in the lining container 66, the examination box 1 is installed. It can be determined that the clogging of the penetration defect 40 in the welded portion has been eliminated.

これらの手順で、作業を完了する。   These steps complete the work.

検査箱１の構造は、上記形状に限らず、内張り面の設置部分の形状に合せて、適宜選択できる。   The structure of the examination box 1 is not limited to the above shape, and can be appropriately selected according to the shape of the installation portion of the lining surface.

また、上記実施例では、１個の検査箱１を用いたが、内張り容器のシール性能検査の際に、欠陥部目詰まり除去のために、水中の対象部位(溶接部貫通欠陥の目詰まり部)に、検査箱１を複数個装着すれば、複数箇所のシール性能検査が可能となり、検査時間を短縮できる。   In the above embodiment, one inspection box 1 is used. However, when the sealing performance of the lining container is inspected, in order to remove the clogging of the defective portion, the target portion in water (the clogged portion of the weld penetration defect is clogged). If a plurality of inspection boxes 1 are mounted, it is possible to inspect the sealing performance at a plurality of locations and shorten the inspection time.

すなわち、内部に超音波振動子を収納し開口端面にシールパッキンを有する検査箱を検査対象部に載せ、検査箱の内部を負圧にするとともに検査箱の内部水を超音波振動子が露出しない状態まで排水し、検査箱の内部水から露出しない状態で超音波振動子を駆動し検査対象部を洗浄し、洗浄中に生ずる気泡により検査対象部の洗浄完了を検知し、洗浄した検査対象部の欠陥を検査する水中検査方法を並行して実施すれば、定期検査などの期間を短縮できる。   In other words, an inspection box containing an ultrasonic transducer inside and having a seal packing on the opening end face is placed on the inspection target part, the pressure inside the inspection box is made negative, and the ultrasonic transducer is not exposed to the water inside the inspection box Drain to the state, drive the ultrasonic transducer in a state where it is not exposed from the internal water of the inspection box, clean the inspection target part, detect the completion of cleaning of the inspection target part by bubbles generated during cleaning, and clean the inspection target part If the underwater inspection method for inspecting defects is performed in parallel, the period of periodic inspections can be shortened.

本発明による水中検査装置の一実施例の構成を示す系統図である。It is a systematic diagram which shows the structure of one Example of the underwater inspection apparatus by this invention. 本発明による(一窓形)水中検査装置の構造をより詳細に示す側断面図である。It is a sectional side view which shows the structure of the underwater inspection apparatus (one-window type) by this invention in detail. 本発明による(一窓形)水中検査装置の構造をより詳細に示す正面図である。It is a front view which shows the structure of the underwater inspection apparatus (one window type) by this invention in detail. 本発明による(一窓形)水中検査装置の構造をより詳細に示す裏面図である。It is a back view which shows the structure of the underwater inspection apparatus (one window type) by this invention in detail. 図１の検査箱１により貫通欠陥部のシール性能を検査している状態を示す斜視図である。It is a perspective view which shows the state which test | inspects the sealing performance of a penetration defect part with the test | inspection box 1 of FIG.

符号の説明Explanation of symbols

１ 検査箱
２ 負圧ライン
３ ホース
４，５ 接続カプラ
６ 給水ライン
７，９ 接続カプラ
８ ホース
１０，１２，１３，１４ 接続カプラ
１１ 負圧発生装置
１５ ドレンバルブ
１６ ベンドバルブ
１７ 圧力計バルブ
１８ 給水量調整バルブ
１９ 給水バルブ
２０ 供給ライン
２１，２３ 接続カプラ
２２ ホース
２４ 供給水元側バルブ
２５ 呼び水ライン
２６ 呼び水バルブ
２７ 高圧供給水ポンプ
２８ 接続カプラ
２９ 水噴射エゼクタ
３０ 内張り
３１ 負圧圧力計
３２ 水中テレビカメラ
３３ 漏洩検出系
３４ フローグラス
３５ 流量計
３６ 給水圧力計
３７ カメラ用ケーブル
３８ テレビモニタ
３９ 取扱いトング
４０ 溶接部貫通欠陥
４１ プール水
４２ 内部水
４３ 気泡
４５ 開口端面
４６ シールパッキン
４７ パッキン溝
４８ ピン
４９ 透明アクリル板
５０ パッキン
５１ 押え板
５２，６１，６２ 固定ボルト
５３ エゼクタ接続配管
５４ エゼクタ取付け金具
５５ スライドガイド
５６ カメラホルダ
５７ カメラユニット
５８ 接続金具
５９ 操作ロープ
６０ スライダ
６３ 溶接線
６４，６５ 穴
６６ 内張り容器
６７ コンクリート躯体
６８ 漏洩検知溝
７０ 水面
７１ 給水分岐ホース
７２ 給水ドレンライン
７３ 検査箱内給水ライン
７４ 水源
７５ 中心線
７６ 超音波振動子
７７ 超音波発振機
７８ 接続ケーブル 1 Inspection Box 2 Negative Pressure Line 3 Hose 4, 5 Connection Coupler 6 Water Supply Line 7, 9 Connection Coupler 8 Hose 10, 12, 13, 14 Connection Coupler 11 Negative Pressure Generator 15 Drain Valve 16 Bend Valve 17 Pressure Gauge Valve 18 Water Supply Adjustment valve 19 Water supply valve 20 Supply line 21, 23 Connection coupler 22 Hose 24 Supply water source side valve 25 Nominal water line 26 Nominal water valve 27 High pressure supply water pump 28 Connection coupler 29 Water injection ejector 30 Inner lining 31 Negative pressure pressure gauge 32 Underwater TV camera 33 Leakage detection system 34 Flow glass 35 Flow meter 36 Supply pressure gauge 37 Camera cable 38 Television monitor 39 Handling tong 40 Weld penetration defect 41 Pool water 42 Internal water 43 Bubble 45 Open end face 46 Seal packing 47 Packing groove 48 Pin 49 Transparent Acrylic plate 50 packing 51 Holding plate 52, 61, 62 Fixing bolt 53 Ejector connection pipe 54 Ejector mounting bracket 55 Slide guide 56 Camera holder 57 Camera unit 58 Connection bracket 59 Operation rope 60 Slider 63 Welding wire 64, 65 Hole 66 Lined container 67 Concrete casing 68 Leakage Detection groove 70 Water surface 71 Water supply branch hose 72 Water supply drain line 73 Water supply line 74 in inspection box Water source 75 Center line 76 Ultrasonic vibrator 77 Ultrasonic oscillator 78 Connection cable

Claims (3)

内部に超音波振動子を収納し検査対象部と接する開口端面にシールパッキンを有する検査箱と、前記検査箱の内部水を前記超音波振動子が露出しない状態まで排水する水噴射エゼクタと、前記検査箱の内部を負圧にするとともに前記水噴射エゼクタに噴射水を供給する負圧発生装置と、前記検査箱の内部水から露出しない状態で前記超音波振動子を駆動し前記検査対象部を洗浄する超音波発振機とを備え、欠陥検査に先立ち検査対象部を洗浄する水中検査装置。   An inspection box that contains an ultrasonic vibrator inside and has a seal packing on an opening end face that is in contact with the inspection target portion, a water jet ejector that drains the internal water of the inspection box to a state where the ultrasonic vibrator is not exposed, and A negative pressure generator that supplies negative pressure to the inside of the inspection box and supplies the water injection ejector to the water injection ejector, and drives the ultrasonic transducer in a state where the inspection object is not exposed from the internal water of the inspection box. An underwater inspection device that includes an ultrasonic oscillator for cleaning, and that cleans an inspection target part prior to defect inspection. 請求項１に記載の水中検査装置において、
前記検査箱の前記開口端面とは反対側に形成された透明窓を通して、排水される内部水の水位を検出するとともに、洗浄中に生ずる気泡により前記検査対象部の洗浄完了を検知する撮像手段およびモニタを備えたことを特徴とする水中検査装置。 The underwater inspection apparatus according to claim 1,
An imaging means for detecting the level of internal water to be drained through a transparent window formed on the opposite side of the opening end surface of the inspection box, and detecting completion of cleaning of the inspection target portion by bubbles generated during cleaning, and An underwater inspection apparatus comprising a monitor. 内部に超音波振動子を収納し開口端面にシールパッキンを有する検査箱を検査対象部に載せ、
前記検査箱の内部を負圧にするとともに前記検査箱の内部水を前記超音波振動子が露出しない状態まで排水し、
前記検査箱の内部水から露出しない状態で前記超音波振動子を駆動し前記検査対象部を洗浄し、
洗浄中に生ずる気泡により前記検査対象部の洗浄完了を検知し、
洗浄した前記検査対象部の欠陥を検査する水中検査方法。
Place the inspection box with the ultrasonic vibrator inside and the seal packing on the opening end face on the inspection target part,
Drain the internal water of the inspection box to a state where the ultrasonic vibrator is not exposed while making negative pressure inside the inspection box,
Driving the ultrasonic transducer in a state where it is not exposed from the internal water of the inspection box, and cleaning the inspection target portion,
Detecting the completion of cleaning of the inspection target part by bubbles generated during cleaning,
An underwater inspection method for inspecting a defect of the cleaned inspection target part.
JP2004309461A 2004-10-25 2004-10-25 Underwater inspection device and underwater inspection method Active JP4352255B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004309461A JP4352255B2 (en) 2004-10-25 2004-10-25 Underwater inspection device and underwater inspection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004309461A JP4352255B2 (en) 2004-10-25 2004-10-25 Underwater inspection device and underwater inspection method

Publications (2)

Publication Number Publication Date
JP2006119080A JP2006119080A (en) 2006-05-11
JP4352255B2 true JP4352255B2 (en) 2009-10-28

Family

ID=36537093

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004309461A Active JP4352255B2 (en) 2004-10-25 2004-10-25 Underwater inspection device and underwater inspection method

Country Status (1)

Country Link
JP (1) JP4352255B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108580425A (en) * 2018-03-27 2018-09-28 苏州林信源自动化科技有限公司 A kind of ultrasonic cleaning equipment being conveniently replaceable rinse bath
KR102426330B1 (en) * 2021-09-27 2022-07-28 한국석유공사 Movable subsea carbon dioxide storage system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010048039A2 (en) * 2008-10-20 2010-04-29 Shell Oil Company Methods and devices for cleaning subsea structures
WO2010048038A2 (en) * 2008-10-20 2010-04-29 Shell Oil Company Methods and devices for cleaning subsea structures using ultrasound
US20120006554A1 (en) * 2009-02-26 2012-01-12 Donald Wayne Allen Methods and devices of cleaning subsea structures

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108580425A (en) * 2018-03-27 2018-09-28 苏州林信源自动化科技有限公司 A kind of ultrasonic cleaning equipment being conveniently replaceable rinse bath
KR102426330B1 (en) * 2021-09-27 2022-07-28 한국석유공사 Movable subsea carbon dioxide storage system

Also Published As

Publication number Publication date
JP2006119080A (en) 2006-05-11

Similar Documents

Publication Publication Date Title
US8638897B2 (en) Underwater remote surface inspection method and apparatus for reactor constituting member
US6219399B1 (en) Maintenance method in nuclear power plant
JP2013517481A (en) Hydrostatic pressure test system and method
JPH06246249A (en) Method and apparatus for ultrasonic cleaning
US9177677B2 (en) Underwater remote inspection device and method for underwater remote inspection
WO2014046550A1 (en) Tool for leak point identification and new methods for identification, close visual inspection and repair of leaking pipelines
US6636579B2 (en) Device and method for repairing inside of reactor pressure vessel
JP4352255B2 (en) Underwater inspection device and underwater inspection method
JP2011017670A (en) Nozzle stub work system for nuclear reactor vessel
WO2020121881A1 (en) Membrane defect inspection method and membrane defect inspection device
US8573032B2 (en) Underwater method and apparatus for detecting leaks in a metallic tank or pit liner plate
JP2005030764A (en) Underwater inspection device
JP4423116B2 (en) Underwater inspection device
JPS63285438A (en) Test of air leak in liquid
KR200284334Y1 (en) Ultrasonic Testing Jig's Water Circulator
JP2001235579A (en) Underwater inspection device in water storage structure for nuclear power plant
JP2000002798A (en) Underwater defect inspection device for lining tank
CN220289407U (en) Can carry out abluent water quality testing device to lens
JPH08304306A (en) Flaw detection test method for vessel nozzle, and device therefor
JP7313963B2 (en) Submersible pump inspection method
JP2654266B2 (en) Inspection method and inspection device for internal pump welds
JP2006029930A (en) Out-pile shipping device and method for nuclear fuel
EA045161B1 (en) METHOD FOR CLEANING THE INTERNAL CAVITY OF A PIPELINE
JPH06300885A (en) Inspection tool for internal pump
JPH03255347A (en) Underwater inspection apparatus

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20061221

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20071206

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20090126

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20090623

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090714

R150 Certificate of patent or registration of utility model

Ref document number: 4352255

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120807

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130807

Year of fee payment: 4