EP0167513A1 - Verfahren zum Reparieren der Rohre eines Dampferzeugers - Google Patents

Verfahren zum Reparieren der Rohre eines Dampferzeugers Download PDF

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Publication number
EP0167513A1
EP0167513A1 EP85870067A EP85870067A EP0167513A1 EP 0167513 A1 EP0167513 A1 EP 0167513A1 EP 85870067 A EP85870067 A EP 85870067A EP 85870067 A EP85870067 A EP 85870067A EP 0167513 A1 EP0167513 A1 EP 0167513A1
Authority
EP
European Patent Office
Prior art keywords
nickel
tube
soln
pipe
sulphamate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85870067A
Other languages
English (en)
French (fr)
Other versions
EP0167513B1 (de
Inventor
Stanislas Ulens
Herman Bosquet
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.)
Nv Verenigde Energiebedrijven Van Het Scheldeland (ebes)
Original Assignee
Nv Verenigde Energiebedrijven Van Het Scheldeland (ebes)
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 Nv Verenigde Energiebedrijven Van Het Scheldeland (ebes) filed Critical Nv Verenigde Energiebedrijven Van Het Scheldeland (ebes)
Publication of EP0167513A1 publication Critical patent/EP0167513A1/de
Application granted granted Critical
Publication of EP0167513B1 publication Critical patent/EP0167513B1/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/04—Tubes; Rings; Hollow bodies
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/002—Component parts or details of steam boilers specially adapted for nuclear steam generators, e.g. maintenance, repairing or inspecting equipment not otherwise provided for
    • F22B37/003—Maintenance, repairing or inspecting equipment positioned in or via the headers
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49352—Repairing, converting, servicing or salvaging
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49718—Repairing
    • Y10T29/49746—Repairing by applying fluent material, e.g., coating, casting

Definitions

  • the present invention relates to a method for repairing the tubes of steam generators by providing a sealed internal metallic sleeve, in order to cover a defective area.
  • the steam generator is a heat exchanger, in which the primary liquid which cools the reactor transfers its heat under a pressure of more than 155 bars and a temperature of around 325 * C, to a secondary circuit, which by evaporation, delivers the steam required to drive the turbine.
  • tubes of a steam generator are made of special stainless steels, in order to withstand severe service stresses and stresses and in particular corrosion, they can be damaged and present microscopic perforating cracks, sources of circuit leaks primary to secondary circuit.
  • the currently most widely used repair method for repairing such steam generator tubes is to mask the damaged area of each tube with an internal metal sleeve.
  • the invention aims to remedy the above drawbacks. It proposes a method which makes it possible to obtain a sealed connection without deformation or local heating of the tube & to repair. It relates to a method for repairing the tubes of steam generators by the supply of a sealed internal metallic sleeve, in order to cover a defective zone, characterized in that said sleeve is produced from the defective zone of the internal wall of the tube by a wet treatment carried out on the spot in the tube.
  • said sleeve is formed by electrolytic deposition of nickel from a nickel sulfamate solution free of chlorine.
  • the closed cavity is arranged in the defective tube, by closing the front part of the tube over a length of 20 to 80 cm in the manner of an electrolytic cell, using an anode.
  • consumption nickel or nickel alloy support which is immersed in the above nickel sulfamate solution and is gripped to the tube to be treated by two plastic pads.
  • a capillary release tube is provided, through which the gases formed during the process can escape.
  • a steam generator annotated as a whole by the reference number 1, of a pressurized water nuclear power station, of a stainless steel heat exchanger, the bundle of tubes of which is traversed internally under a pressure of 155 bar by a primary circuit and surrounded externally by a secondary circuit.
  • the tubes 2 have a diameter of approximately 20 mm and a length of approximately 12 m, folded in the shape of an inverted U.
  • These tubes are made of austenitic stainless alloys based on nickel, sold under the brand INCONEL 600 R or INCONEL SB 163 comprising 75% of nickel and 13 to 18% of chromium and iron.
  • Repair work can of course only be carried out during a shutdown of the nuclear power plant, from the moment when one has access to the tube plate 3 at the inlet of the steam generator 1.
  • an electrolytic cell represented as a whole by the reference notation 4 ', is formed on site along the interior wall of the damaged tube 2'.
  • the lower part is part of a gripping device 16 intended to fix the lower part of two elastic pads 17 to a tubular plate 3.
  • the gripping device comprises two elastic pads 17 which are introduced and brought into neighboring tubes.
  • the defective front section 5 of the tube 2 'on which a sleeve must be provided must be pretreated, before subjecting it to a treatment of surface for repair.
  • the inner surface of the tube 2 ′ must in particular be sufficiently clean to make possible perfect fixing of the deposited metal, which generally requires prior cleaning of the surface.
  • the sleeve along the defective zone 26 of the inner wall of the tube 2 ' is formed, using a surface treatment carried out on the spot, in the tube 2', for example by deposition from a phase liquid, which is in contact with the surface to be covered.
  • the method does not apply to horizontal tubes, because the contact between the metal and the liquid phase is no longer ensured in the vicinity of the upper layer.
  • the invention consists in describing the precise operating conditions, in order to create a coating resistant to corrosion using a chlorine-free electrolytic bath.
  • compositions and the main operating characteristics of two modes of implementation of electrodeposition baths are presented.
  • the internal surface of the steam generator is cleaned over a distance corresponding to the first sixty centimeters of the tube bundle.
  • the deposits and oxides which have formed after commissioning are removed by cleaning with a cylindrical wire brush.
  • the electrolytic solution is prepared by mixing sulfamic (amino-sulfonic) acid in crystallized form and nickel carbonate in the presence of hydrolysis inhibitors.
  • the reaction is carried out according to the following equation: NiC 03 + 2 NH2 SO 3 H ⁇ Ni (H 2 NSO 3 ) 2 + H20 + CO 2 and provides a concentrated solution at 48 ° Baumé containing 550 to 650 g / 1 of nickel sulfamate.
  • the purity of the nickel sulfamate solution reaches more than 99%.
  • composition of the electrolytic bath greatly influences the quality of the coating as to attachment to a support, constant thickness, corrosion resistance, hardness and weldability.
  • Decomposition is also avoided by adding small amounts of boric acid (about 25 g / l) by which the pH is adjusted between 3 and 5.
  • colloids improves the brightness of the nickel layer.
  • alkyl sulfates such as lauryl sulfate (0.15 - 0.30 g / l) are used.
  • the freshly prepared electrolytic solution is poured into the container 19 and flows under gravity, through the valve 20, the flow meter 21, the adjustment valve 22, the thermostat 23, the pH meter 24 and enters the electrolysis cell 1 through the supply line 14.
  • the fresh electrolytic solution propagates in the annular space 25 formed by the wall to be repaired from the tube 2 of the steam generator.
  • This wall is limited by the upper 6 and lower 7 bolts.
  • This space 25 is entirely filled with liquid.
  • the liquid overflows through an upper connecting pipe and flows through the annular space 27 from the hollow cavity of the electrode 12 towards the pipe evacuation 15.
  • the used solution is collected by the conduit and the three-way valve 28 in glass requests 29 from which the solution is rejected or regenerated so that it can be used again in one of the containers 4 or 5.
  • the flow rate is adjusted to the target value of the desired flow velocity in electrolysis, approximately 1 to 15 cm / s.
  • the temperature is kept constant at 55-65 ° C and at a pH value of 3 to 5 ° Soerensen.
  • anode a small hollow tube based on nickel, preferably nickel S, is used.
  • This anode is produced, for example, from an extruded titanium tube, on which a coating of nickel to be consumed 30 is electrolytically deposited with a sulfur content of 0.02%.
  • Nickel S provides the advantage of not passivating.
  • the ends of the tube 12 are provided with threads to allow deodorization with the upper head 6 and the lower head 7.
  • the operating conditions must be carefully maintained for the temperature at the inlet of the cell, the potential difference, the current density, the flow rate and the composition.
  • the gases which are possibly formed in the electrolysis cell escape at the top by the capillary tube, while the liquid is retained by its higher viscosity.
  • the device is removed from the repaired tube. This removal from the device is made possible by the fact that the upper part comprises an elastic polyurethane foam, which is applied above the sleeve.
  • the resistance of the sleeve has been proven by many corrosion tests under tension in an alkaline medium and in pure water that is charged with hydrogen at a temperature of 350 ° C.
  • the current intensity is a quantity dependent on the immersed surface of the cathode.
  • the current intensity is adjusted using the potential difference between the electrodes.
  • the conductivity of the bath and the distance between the hollow nickel anode and the wall of the tube are decisive in this case.
  • the metal deposits take place according to a completely current-free process.
  • the nickel coating can be deposited, for example, by catalytic reduction from a solution of nickel salts using sodium hypophosphites free of chlorine.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Electroplating Methods And Accessories (AREA)
EP85870067A 1984-05-11 1985-05-10 Verfahren zum Reparieren der Rohre eines Dampferzeugers Expired EP0167513B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE212910 1984-05-11
BE0/212910A BE899632A (nl) 1984-05-11 1984-05-11 Werkwijze om pijpen van een stoomgenerator te herstellen.

Publications (2)

Publication Number Publication Date
EP0167513A1 true EP0167513A1 (de) 1986-01-08
EP0167513B1 EP0167513B1 (de) 1988-07-27

Family

ID=3843757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85870067A Expired EP0167513B1 (de) 1984-05-11 1985-05-10 Verfahren zum Reparieren der Rohre eines Dampferzeugers

Country Status (5)

Country Link
US (1) US4696723A (de)
EP (1) EP0167513B1 (de)
BE (1) BE899632A (de)
DE (1) DE3563988D1 (de)
ES (1) ES8701371A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240957A2 (de) * 1986-04-08 1987-10-14 Metallisierwerk Peter Schreiber KG. Vorrichtung zur Oberflächenbeschichtung von metallischen oder nichtmetallischen Werkstücken
EP0291373A1 (de) * 1987-05-14 1988-11-17 Framatome Rohrförmiger Stab für die Behandlung der Innenfläche eines Rohres
WO1989001536A1 (en) * 1987-08-21 1989-02-23 Sb Plating Limited Electro-plating techniques
FR2652191A1 (fr) * 1989-09-15 1991-03-22 Framatome Sa Dispositif de mise en contact d'un liquide de traitement avec une zone de la surface interieure d'un tube et procede de mise en place de ce dispositif dans le tube.
BE1002822A4 (nl) * 1989-02-08 1991-06-18 Lemmens Godfried Werkwijze voor het herstellen van de pijpen van een stoomgenerator van een kerncentrale, alsmede inrichting hiertoe aangewend.
CN103950905A (zh) * 2014-04-30 2014-07-30 金川集团股份有限公司 一种氨基磺酸镍产品的结晶方法

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2585817B1 (fr) * 1985-08-05 1989-08-25 Framatome Sa Procede et dispositif de traitement de surface pour les echangeurs de chaleur
FR2598202B1 (fr) * 1986-04-30 1990-02-09 Framatome Sa Procede de chemisage d'un tube peripherique d'un generateur de vapeur.
FR2652440B1 (fr) * 1989-09-27 1993-12-03 Framatome Procede de reparation par chemisage d'un tube tel qu'un tube de generateur de vapeur.
FR2704678B1 (fr) * 1993-04-29 1995-08-11 Framatome Sa Procede et dispositif de reparation et de protection contre la fissuration de la paroi interne d'un tube de traversee du fond de la cuve d'un reacteur nucleaire a eau sous pression.
US5516415A (en) * 1993-11-16 1996-05-14 Ontario Hydro Process and apparatus for in situ electroforming a structural layer of metal bonded to an internal wall of a metal tube
FR2731498B1 (fr) * 1995-03-08 1997-06-06 Framatome Sa Procede de reparation par chemisage electrolytique d'un tube tel qu'un tube de generateur de vapeur
US5895561A (en) * 1996-01-17 1999-04-20 Kennecott Utah Copper Corporation Method of sealing cooling blocks using electrodeposited metal
FR2821627B1 (fr) * 2001-03-05 2003-09-12 Lorilleux Procede et dispositif d'elaboration par voie electrolytique d'un depot selectif epais de nickel sur une piece
US11280016B2 (en) * 2020-03-19 2022-03-22 Integran Technologies Inc. Apparatus and method for in-situ electrosleeving and in-situ electropolishing internal walls of metallic conduits

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB299298A (en) * 1927-10-22 1929-07-22 John Quincy Macdonald Improvement in electroplating
FR2421359A1 (fr) * 1978-03-31 1979-10-26 Fives Cail Babcock Procede de protection des surfaces d'une chaudiere de recuperation en contact avec un fluide chauffant, et chaudiere obtenue par l'application du procede

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US69986A (en) * 1867-10-22 Improvement in lining soda-fountains
US1534815A (en) * 1922-12-15 1925-04-21 Alfred Ott Engine cylinder repair method and apparatus
US2115403A (en) * 1936-03-19 1938-04-26 American Enka Corp Repairing spinnerets
US2137806A (en) * 1937-02-03 1938-11-22 Arthur E Paige Method and means for forming hollow articles electrolytically
US3568721A (en) * 1969-03-18 1971-03-09 Reintjes Ind Services Of Louis Tube repair tool
US3711310A (en) * 1971-07-26 1973-01-16 United Aircraft Corp Repair process for aluminum and magnesium articles
US3884772A (en) * 1971-09-25 1975-05-20 Furukawa Electric Co Ltd Method for producing a heat exchanger element
US4199414A (en) * 1978-01-09 1980-04-22 Uop Inc. Method of producing finned heat transfer tube with porous boiling surface
US4246088A (en) * 1979-01-24 1981-01-20 Metal Box Limited Method and apparatus for electrolytic treatment of containers
JPS5838637A (ja) * 1981-09-01 1983-03-07 Nippon Steel Corp 連続鋳造用鋳型の補修方法
JPS5844200A (ja) * 1981-09-08 1983-03-15 日本綜合防水株式会社 トンネルの防水施工法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB299298A (en) * 1927-10-22 1929-07-22 John Quincy Macdonald Improvement in electroplating
FR2421359A1 (fr) * 1978-03-31 1979-10-26 Fives Cail Babcock Procede de protection des surfaces d'une chaudiere de recuperation en contact avec un fluide chauffant, et chaudiere obtenue par l'application du procede

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 88, 1978, page 452, résumé no. 80955v, Columbus, Ohio, US; A.I. KOVBASYUK et al.: "Restoration of water distribution gate valves by chromium plating in a cold self-regulating electrolyte"; & TR. KISHINEV. S-KH. INST. 1974, 123, 99-102 *
CHEMICAL ABSTRACTS, vol. 88, 1978, page 452, résumé no. 80956w, Columbus, Ohio, US; M.P. STRATULAT et al: "Restoration of tractor engine sleeves by wear-resistance chromium coatings"; & TR. KISHINEV. S-KH. INST. 1974, 123, 102-7 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240957A2 (de) * 1986-04-08 1987-10-14 Metallisierwerk Peter Schreiber KG. Vorrichtung zur Oberflächenbeschichtung von metallischen oder nichtmetallischen Werkstücken
EP0240957A3 (de) * 1986-04-08 1987-11-11 Metallisierwerk Peter Schreiber KG. Vorrichtung zur Oberflächenbeschichtung von metallischen oder nichtmetallischen Werkstücken
EP0291373A1 (de) * 1987-05-14 1988-11-17 Framatome Rohrförmiger Stab für die Behandlung der Innenfläche eines Rohres
FR2615207A1 (fr) * 1987-05-14 1988-11-18 Framatome Sa Canne tubulaire pour le traitement de la surface interieure d'un tube
WO1989001536A1 (en) * 1987-08-21 1989-02-23 Sb Plating Limited Electro-plating techniques
BE1002822A4 (nl) * 1989-02-08 1991-06-18 Lemmens Godfried Werkwijze voor het herstellen van de pijpen van een stoomgenerator van een kerncentrale, alsmede inrichting hiertoe aangewend.
FR2652191A1 (fr) * 1989-09-15 1991-03-22 Framatome Sa Dispositif de mise en contact d'un liquide de traitement avec une zone de la surface interieure d'un tube et procede de mise en place de ce dispositif dans le tube.
CN103950905A (zh) * 2014-04-30 2014-07-30 金川集团股份有限公司 一种氨基磺酸镍产品的结晶方法
CN103950905B (zh) * 2014-04-30 2016-04-13 金川集团股份有限公司 一种氨基磺酸镍产品的结晶方法

Also Published As

Publication number Publication date
ES8701371A1 (es) 1986-11-16
EP0167513B1 (de) 1988-07-27
DE3563988D1 (en) 1988-09-01
ES543044A0 (es) 1986-11-16
BE899632A (nl) 1984-11-12
US4696723A (en) 1987-09-29

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