JPS6157920B2 - - Google Patents

Info

Publication number
JPS6157920B2
JPS6157920B2 JP57157951A JP15795182A JPS6157920B2 JP S6157920 B2 JPS6157920 B2 JP S6157920B2 JP 57157951 A JP57157951 A JP 57157951A JP 15795182 A JP15795182 A JP 15795182A JP S6157920 B2 JPS6157920 B2 JP S6157920B2
Authority
JP
Japan
Prior art keywords
electrode
pressure
wall
metal
electrolyte
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.)
Expired
Application number
JP57157951A
Other languages
Japanese (ja)
Other versions
JPS5855600A (en
Inventor
Kiinheefuaa Manfureeto
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.)
KERUNFUORUSHUNGUSUTSUENTORUMU KAARUSURUUE GmbH
Original Assignee
KERUNFUORUSHUNGUSUTSUENTORUMU KAARUSURUUE GmbH
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 KERUNFUORUSHUNGUSUTSUENTORUMU KAARUSURUUE GmbH filed Critical KERUNFUORUSHUNGUSUTSUENTORUMU KAARUSURUUE GmbH
Publication of JPS5855600A publication Critical patent/JPS5855600A/en
Publication of JPS6157920B2 publication Critical patent/JPS6157920B2/ja
Granted legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25FPROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00Electrolytic etching or polishing
    • C25F3/16Polishing
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25FPROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21FPROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/001Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
    • G21F9/002Decontamination of the surface of objects with chemical or electrochemical processes
    • G21F9/004Decontamination of the surface of objects with chemical or electrochemical processes of metallic surfaces
    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21FPROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/001Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
    • G21F9/005Decontamination of the surface of objects by ablation

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Food Science & Technology (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cleaning In General (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Description

【発明の詳細な説明】 本発明は、電解液を強制循環のために加圧状態
で金属配管系統の壁の一部分に導き、移動電極に
よる電解研摩でその壁部分を浄化する方法及びこ
の方法を実施するための装置に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for introducing an electrolyte under pressure for forced circulation to a portion of the wall of a metal piping system and for cleaning that wall portion by electropolishing with a moving electrode. It relates to an apparatus for carrying out the invention.

たとえば管の内壁ないしは金属配管系統の別の
部品のように近寄つたり到達することが難しいよ
うな金属表面の汚染物の除去、特にこのような配
管系統における放射性汚染物の除去は、従来いづ
れの場合も良好な結果が得られないか、満足に実
施出来なかつた。そのため一般的な方法の一つと
して電解研摩がある。しかし従来は数メートルの
長さに分解された管だけしか可動電極で内側を処
理出来なかつた。そのため管全体を電解液に漬け
ること、並びにあらかじめシールされた管(管部
片)内の室を電解液で充満することが行なわれて
いた(R.P.AIIen及びH.W.Arrowsmith著
“Materials Performance”,VoI.18.No.11.(1979
年)第21頁〜第26頁参照)。
Removal of contaminants from metal surfaces that are difficult to access or reach, such as the inner walls of pipes or other parts of metal piping systems, and in particular the removal of radioactive contaminants in such piping systems, has traditionally been difficult. In some cases, good results were not obtained or implementation was not satisfactory. Therefore, one of the common methods is electrolytic polishing. However, in the past, only tubes that had been disassembled into lengths of several meters could be treated with movable electrodes. This involved immersing the entire tube in electrolyte and filling a chamber within the previously sealed tube (tube section) with electrolyte (RPAIIen and HWA Arrowsmith, “Materials Performance”, VoI.18). No.11.(1979
(see pages 21-26).

この方法の不利な欠点の一つは、浄化すべき管
を電解研摩の前に分解しなければならないという
ことである。更に複数の湾曲部あるいは遮断弁な
いしコツクを通して電極を通過させることができ
ないということである。
One of the disadvantages of this method is that the tube to be cleaned must be disassembled before electropolishing. Furthermore, it is not possible to pass the electrode through bends or cut-off valves.

本発明の目的は金属配管系統を分解する必要な
しに浄化出来るような方法とその装置を提供する
ことにある。ここでは管系統とは球形コツク、ス
ライド弁などのような遮断装置を含む直管及び湾
曲管を意味することにする。本発明の方法により
上昇ないし下降配管が充分に浄化出来るようにし
ようとするものである。この方法及び装置は特に
放射能で汚染された配管系統の除染のために適用
しようとするものである。
SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for cleaning metal piping systems without the need for disassembly. Here, by pipe system we mean straight pipes and curved pipes including shutoff devices such as spherical pots, slide valves, etc. The method of the present invention is intended to enable sufficient purification of the ascending or descending piping. The method and apparatus are particularly intended for decontamination of radioactively contaminated piping systems.

この目的は本発明によれば、配管系統の壁の一
部分に50バールあるいはそれ以上の高圧で電解液
を吹きつけ、配管系統中を高圧ジエツト流によつ
て、一端にキヤツプ付の高圧ノズルを有し他端に
絶縁スペーサをもつた電極を移動することによつ
て達成される。
This purpose, according to the invention, is achieved by spraying electrolyte at a high pressure of 50 bar or more onto a part of the wall of the pipe system, by means of a high-pressure jet flow through the pipe system, using a high-pressure nozzle with a cap at one end. This is achieved by moving an electrode with an insulating spacer at the other end.

この方法を実施するための本発明に基づく装置
は、電解液を強制循環するための浄化すべき壁に
向いた電解液流出開口と、少なくとも電極範囲に
固定あるいは移動可能に配置された絶縁スペーサ
とを備え、50バールあるいはそれ以上の高圧で配
管系統の壁の一部分に吹きつけられる電解液の高
圧ジエツト流の反動で移動する電極によつて、電
解研摩により金属配管系統の内壁を浄化する装置
において、導電体として作用する金属製の安定化
要素あるいは導電体として作用する金属製撚線を
持ち一端に配管系統の内壁に対し角度をつけかつ
半径方向に向けて配置された複数の開口を持つ高
圧ノズルが設けられている弾性高圧ホース、高圧
ノズルの先端に設けられている弾性キヤツプ、電
極の反ノズル側端に設けられ電極範囲にある絶縁
スペーサの面積よりも大きくかつ配管系統の通過
すべき最小断面積よりも小さな面積を有している
絶縁スペーサ、及び前記高圧ホースの終端部片の
まわりに配置され導電体に接続された金属製の弾
性電極を持つていることを特徴とする。
The device according to the invention for carrying out this method comprises an electrolyte outflow opening facing the wall to be purified for forced circulation of the electrolyte and an insulating spacer which is fixedly or movably arranged at least in the electrode area. in an apparatus for cleaning the inner walls of a metal piping system by electrolytic polishing, by means of an electrode that moves in reaction to a high-pressure jet stream of electrolyte that is blown onto a part of the wall of the piping system at a high pressure of 50 bar or more. , high voltage having a metallic stabilizing element acting as an electrical conductor or a metallic strand acting as an electrical conductor and having at one end a plurality of openings oriented radially and at an angle to the internal wall of the piping system. An elastic high-pressure hose provided with a nozzle, an elastic cap provided at the tip of the high-pressure nozzle, and an insulating spacer provided at the opposite end of the electrode in the area of the electrode. It is characterized in that it has an insulating spacer having an area smaller than the cross-sectional area, and a metal elastic electrode arranged around the end piece of the high-pressure hose and connected to a conductor.

本発明に基づく装置の電極は、スパイラル状陰
極としてあるいはら旋状テープとして形成され
る。
The electrode of the device according to the invention is formed as a spiral cathode or as a spiral tape.

電極の弾性力によつて湾曲部への適合が可能と
なる。高圧ジエツト流の反動による自動搬送によ
つて、研摩すべき管の分解は不要になり、湾曲部
及びスライド弁並びに傾斜した配管における処理
も可能となる。高圧ジエツト流を同時に利用する
ことによつて管の非常に良好な浄化が達成出来
る。自動搬送によつて管を遠隔操作で電解研摩す
ることができ、それによつて作業員の放射線負荷
は著しく減少できる。使用すべき電解液は高圧ジ
エツトノズルを通つて約50バールから約600バー
ルの圧力で管の内壁に衝突せしめられる。管壁に
対し斜めに向けられた電解液のジエツト流の反動
によつて管の内部における電極の自動的な前進運
動が達せられる。電解液ジエツト流は連続した一
様な大きさの電流の通過を可能にする。たいてい
の場合300から400アンペアの電流で充分である。
The elasticity of the electrodes allows adaptation to curves. The automatic conveyance by the reaction of the high-pressure jet stream eliminates the need for disassembly of the tube to be polished and also allows processing in bends and slide valves as well as in inclined piping. Very good cleaning of the pipe can be achieved by simultaneously utilizing a high pressure jet stream. Automated transport allows the tube to be electropolished remotely, thereby significantly reducing the radiation burden on the workers. The electrolyte to be used is forced to impinge on the inner wall of the tube through a high-pressure jet nozzle at a pressure of about 50 bar to about 600 bar. An automatic forward movement of the electrode within the tube is achieved by the reaction of the electrolyte jet stream directed obliquely to the tube wall. The electrolyte jet flow allows the passage of a continuous and uniformly large current. In most cases, a current of 300 to 400 amperes is sufficient.

また弾性キヤツプと絶縁スペーサにより電解液
が急激に流れ出ないようにいわゆる液体プラグを
形成するので、研摩作用に有害な気泡が配管系統
の内壁に付着する恐れもなくなる。
Furthermore, since the elastic cap and the insulating spacer form a so-called liquid plug to prevent the electrolyte from flowing out rapidly, there is no possibility that air bubbles harmful to the polishing action will adhere to the inner wall of the piping system.

以下図面に示す実施例に基づいて本発明を詳細
に説明する。
The present invention will be described in detail below based on embodiments shown in the drawings.

配管系統1の放射性不純物で汚染された内壁を
除染するため、この配管系統の中に弾性高圧ホー
ス5が挿入される。この高圧ホース5はその先端
7に特殊鋼製の高圧ジエツトノズル9を有し、ホ
ース5のまわりには厚さ3mmのVA線からなる電
極(陰極)4が約30mmの長さにわたつて巻きつけ
られ、合成樹脂製の2つのスペーサ11と12を
有している。50バールの出力を持つた高圧ジエツ
トポンプ(図示せず)によつて、電解液は1200
/hの速度で高圧ホース5及びジエツトノズル
9を通つて内径150mmの配管系統の中にないしは
その内壁2に噴射される。この場合配管系統とは
中央に90゜の湾曲部を持つた5mの長さの管を意
味する。高圧ノズル9は一列の開口10を有し、
これらの開口10は電解液が配管1の内壁に角度
をなして衝突するように配置されている。配管内
部におけるこの装置の送り速度は5cm/minであ
る。電流は図示されていない電源から導電体6に
流れ、さらに高圧ホース5の終端部片8のまわり
に配置された陰極4、電解液3及び管1の金属内
壁2を通つて流れる。電流の強さは約300アンペ
アである。高圧ノズル9はその先端に弾性キヤツ
プ13を有し、このキヤツプ13は電極の反ノズ
ル側端に配置されたスペーサ12と一緒に、高圧
ノズル9を通つて噴出する電解液3が急激には流
れ出ないように作用する。絶縁スペーサ11と1
2はこの場合3本アームの星形をしており、中央
開口を有しているので、高圧ホース5に押し込む
ことが出来る。その場合スペーサ12はスペーサ
11の断面積の2倍の面積をしている。
In order to decontaminate the inner wall of the piping system 1 contaminated with radioactive impurities, an elastic high-pressure hose 5 is inserted into this piping system. This high-pressure hose 5 has a high-pressure jet nozzle 9 made of special steel at its tip 7, and an electrode (cathode) 4 made of VA wire with a thickness of 3 mm is wound around the hose 5 over a length of about 30 mm. It has two spacers 11 and 12 made of synthetic resin. A high-pressure jet pump (not shown) with an output of 50 bar pumps the electrolyte at 1200 bar.
/h through a high-pressure hose 5 and a jet nozzle 9 into a piping system with an internal diameter of 150 mm or onto its inner wall 2. In this case, the piping system means a 5 m long pipe with a 90° bend in the middle. The high pressure nozzle 9 has a row of openings 10;
These openings 10 are arranged so that the electrolyte impinges on the inner wall of the pipe 1 at an angle. The feed rate of this device inside the pipe is 5 cm/min. Current flows from a power supply (not shown) in the electrical conductor 6 and further through the cathode 4 arranged around the end piece 8 of the high-pressure hose 5, the electrolyte 3 and the metal inner wall 2 of the tube 1. The strength of the current is approximately 300 amperes. The high-pressure nozzle 9 has an elastic cap 13 at its tip, and this cap 13, together with a spacer 12 arranged at the opposite end of the electrode, prevents the electrolyte 3 spouted through the high-pressure nozzle 9 from rapidly flowing out. It acts like there is no such thing. Insulating spacers 11 and 1
2 is in the shape of a star with three arms in this case and has a central opening so that it can be pushed into the high pressure hose 5. In this case, the spacer 12 has an area twice the cross-sectional area of the spacer 11.

本発明によれば300の除染係数が得られる。こ
の除染係数は管内壁2がもう一度温水及び高圧で
噴出(洗流)されると10倍だけ高められるので、
全体として3000の除染係数が達せられる。
According to the invention, a decontamination factor of 300 is obtained. This decontamination coefficient is increased by 10 times when the inner wall 2 of the pipe is once again sprayed (washed) with hot water and high pressure.
Overall a decontamination factor of 3000 is achieved.

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

図面は本発明の実施例を示す断面図である。 1:配管、2:内壁、3:電解液、4:電極
(陰極)、5:高圧ホース、6:導電体、7:高圧
ホースの先端、8:終端部片、9:高圧ノズル、
10:開口、11,12:スペーサ、13:キヤ
ツプ。
The drawings are cross-sectional views showing embodiments of the present invention. 1: Piping, 2: Inner wall, 3: Electrolyte, 4: Electrode (cathode), 5: High pressure hose, 6: Conductor, 7: Tip of high pressure hose, 8: End piece, 9: High pressure nozzle,
10: opening, 11, 12: spacer, 13: cap.

Claims (1)

【特許請求の範囲】 1 電解液を強制循環のために加圧状態で金属配
管系統の壁の一部分に導き、移動電極による電解
研摩でその壁部分を浄化する方法において、前記
壁部分に50バールあるいはそれ以上の高圧で電解
液を吹きつけ、配管系統中をその高圧ジエツト流
の反動によつて、一端にキヤツプ付の高圧ノズル
を有し他端に絶縁スペーサをもつた電極を移動す
ることを特徴とする電解研摩により金属配管系統
の内壁を浄化する方法。 2 電解液を強制循環するための浄化すべき壁に
向いた電解液流出開口と、少なくとも電極範囲に
固定あるいは移動可能に配置された絶縁スペーサ
とを備え、50バールあるいはそれ以上の高圧で配
管系統の壁の一部分に吹きつけられる電解液の高
圧ジエツト流の反動で移動する電極によつて、電
解研摩により金属配管系統の内壁を浄化する装置
において、導電体6として作用する金属製の安定
化要素あるいは導電体6として作用する金属製撚
線を持ち一端7に配管系統1の内壁2に対し角度
をつけかつ半径方向に向けて配置された複数の開
口10を持つ高圧ノズル9が設けられている弾性
高圧ホース5、高圧ノズル9の先端に設けられて
いる弾性キヤツプ13、電極の反ノズル側端に設
けられ電極範囲にある絶縁スペーサ11の面積よ
りも大きくかつ配管系統の通過すべき最小断面積
よりも小さな面積を有している絶縁スペーサ1
2、及び前記高圧ホース5の終端部片8のまわり
に配置され導電体6に接続された金属製の弾性電
極4を持つていることを特徴とする電解研摩によ
り金属配管系統の内壁を浄化するための装置。 3 電極がスパイラル状の陰極4として形成され
ていることを特徴とする特許請求の範囲第2項記
載の装置。 4 電極から旋状テープとして形成されているこ
とを特徴とする特許請求の範囲第2項記載の装
置。
[Scope of Claims] 1. A method in which an electrolyte is introduced under pressure for forced circulation into a part of a wall of a metal piping system and the wall part is purified by electrolytic polishing with a moving electrode, the wall part being subjected to a pressure of 50 bar. Alternatively, it is possible to spray an electrolytic solution at a higher pressure and move an electrode, which has a high-pressure nozzle with a cap at one end and an insulating spacer at the other end, through the piping system by the reaction of the high-pressure jet flow. A method for purifying the inner walls of metal piping systems using electrolytic polishing. 2. Piping systems with electrolyte outflow openings facing the wall to be purified for forced circulation of the electrolyte and insulating spacers fixedly or movably arranged at least in the area of the electrodes at high pressures of 50 bar or more. A stabilizing element made of metal acting as an electrical conductor 6 in an apparatus for cleaning the internal walls of a metal piping system by electrolytic polishing by means of an electrode moving in reaction to a high-pressure jet stream of electrolyte sprayed onto a section of the wall. Alternatively, a high-pressure nozzle 9 is provided with a metal strand acting as an electrical conductor 6 and having at one end 7 a plurality of openings 10 oriented radially and at an angle to the inner wall 2 of the pipe system 1. A minimum cross-sectional area that is larger than the area of the elastic high-pressure hose 5, the elastic cap 13 provided at the tip of the high-pressure nozzle 9, and the insulating spacer 11 provided at the opposite end of the electrode and located in the electrode area, and that the piping system must pass through. Insulating spacer 1 having a smaller area than
2, and cleaning the inner wall of a metal piping system by electrolytic polishing, characterized in that it has a metal elastic electrode 4 arranged around the end piece 8 of the high-pressure hose 5 and connected to the electrical conductor 6; equipment for. 3. Device according to claim 2, characterized in that the electrode is formed as a spiral cathode 4. 4. Device according to claim 2, characterized in that it is formed as a spiral tape from four electrodes.
JP57157951A 1981-09-12 1982-09-10 Method and apparatus for purifying inner wall of metal piping system by electrolytic polishing Granted JPS5855600A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3136187A DE3136187C2 (en) 1981-09-12 1981-09-12 Method and device for cleaning the inner walls of metallic pipe systems by electropolishing with the aid of moving electrodes
DE3136187.0 1981-09-12

Publications (2)

Publication Number Publication Date
JPS5855600A JPS5855600A (en) 1983-04-01
JPS6157920B2 true JPS6157920B2 (en) 1986-12-09

Family

ID=6141460

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57157951A Granted JPS5855600A (en) 1981-09-12 1982-09-10 Method and apparatus for purifying inner wall of metal piping system by electrolytic polishing

Country Status (3)

Country Link
EP (1) EP0074463B1 (en)
JP (1) JPS5855600A (en)
DE (1) DE3136187C2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3343396A1 (en) * 1983-11-30 1985-06-05 Kraftwerk Union AG, 4330 Mülheim METHOD FOR DECONTAMINATING METALLIC COMPONENTS OF A NUCLEAR TECHNICAL PLANT
DE3345278A1 (en) * 1983-12-14 1985-06-27 Kraftwerk Union AG, 4330 Mülheim DEVICE FOR ELECTROPOLISHING THE INTERNAL SURFACE OF HOLLOW CYLINDRICAL BODIES
DE3430384A1 (en) * 1984-08-17 1986-02-20 Kraftwerk Union AG, 4330 Mülheim METHOD AND DEVICE FOR ELECTROPOLISHING THE INTERIOR SURFACE OF U-SHAPED HEAT EXCHANGER TUBES
DE3564708D1 (en) * 1984-11-09 1988-10-06 Siemens Ag Apparatus for electropolishing the inner surfaces of tubes
DE3614046A1 (en) * 1985-05-09 1986-11-20 EAB Electronic-Apparate-Bau GmbH, 8984 Riezlern Device for cleaning laid pipes
US4690737A (en) * 1986-06-10 1987-09-01 Cation Corporation Electrochemical rifling of gun barrels
JP2678754B2 (en) * 1987-06-09 1997-11-17 日本酸素株式会社 Manufacturing method of stainless steel manifold for supplying high purity gas
GB2319259A (en) * 1996-11-15 1998-05-20 Babcock Rosyth Defence Limited reducing radionucleide contamination of a metallic component
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DE3136187A1 (en) 1983-04-28
EP0074463B1 (en) 1985-08-07
EP0074463A1 (en) 1983-03-23
JPS5855600A (en) 1983-04-01
DE3136187C2 (en) 1988-08-18

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