EP0536053B1 - Procédé de repérage individuel des tubes d'un échangeur de chaleur - Google Patents

Procédé de repérage individuel des tubes d'un échangeur de chaleur Download PDF

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Publication number
EP0536053B1
EP0536053B1 EP92402692A EP92402692A EP0536053B1 EP 0536053 B1 EP0536053 B1 EP 0536053B1 EP 92402692 A EP92402692 A EP 92402692A EP 92402692 A EP92402692 A EP 92402692A EP 0536053 B1 EP0536053 B1 EP 0536053B1
Authority
EP
European Patent Office
Prior art keywords
tubes
tube
code
process according
individual
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 - Lifetime
Application number
EP92402692A
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German (de)
English (en)
French (fr)
Other versions
EP0536053A1 (fr
Inventor
Gérard Boula
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.)
Areva NP SAS
Original Assignee
Framatome SA
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 Framatome SA filed Critical Framatome SA
Publication of EP0536053A1 publication Critical patent/EP0536053A1/fr
Application granted granted Critical
Publication of EP0536053B1 publication Critical patent/EP0536053B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • 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
    • Y10T29/49373—Tube joint and tube plate structure
    • 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
    • Y10T29/49391—Tube making or reforming
    • 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
    • Y10T29/49764—Method of mechanical manufacture with testing or indicating
    • Y10T29/49771—Quantitative measuring or gauging

Definitions

  • the invention relates to a method for carrying out the individual identification of the tubes of a heat exchanger such as a steam generator used in a nuclear power station, in order to ensure immediate identification of any tube throughout the duration life of the device.
  • a heat exchanger such as a steam generator used in a nuclear power station
  • the steam generators fitted to nuclear power plants have several thousand inverted U-shaped tubes arranged in bundles, the two ends of which pass through a thick plate, called tube plate, in which each of the tubes is welded and then expanded.
  • This bundle of tubes ensures the heat exchange between the water circulating in the primary circuit of the reactor, called primary water, and the water circulating in the secondary circuit, called secondary water.
  • the temperature of the primary water inside each of the tubes therefore decreases appreciably between their inlet end and their outlet end. For this reason, commonly called “hot branch” and “cold branch” the rising and falling branches of the tubes, respectively extending the inlet and outlet ends of the primary water.
  • the inverted U tubes of the bundle of tubes of a steam generator are housed inside a cylindrical envelope, of vertical axis, in which the tube plate is fixed. This has the consequence that most of these tubes have different geometrical characteristics from each other. Since the tubes are generally manufactured in different places from the place where the assembly takes place steam generators, an individual identification of the tubes must be made before their routing on the place of assembly. Currently, this identification is carried out by affixing on each of the tubes a glued label, on which is written a code guaranteeing the mounting of the tubes at the location which returns to them on the tube plate of the steam generator. Once this location has been identified, the label is removed and the tube is placed in the steam generator and welded to the tube plate.
  • the current technique of individual location of the tubes does not in any case make it possible to locate the tubes in Cartesian coordinates on the tube plate, to perform certain machining, inspection or maintenance operations on these tubes, after they have been attached to the tube plate.
  • the subject of the invention is mainly an original method of individual identification of the tubes of a heat exchanger such as a steam generator, making it possible to ensure the individual identification of each of the tubes throughout the lifetime of the apparatus and, if necessary, during the manufacture of the tubes.
  • this result is obtained by means of a method of individual identification of the tubes of a heat exchanger comprising a bundle of tubes, the end portions of which are embedded in at least one tube plate, characterized by the fact that it consists in marking each of the tubes with an individual identification code capable of being read by reading means at least during the operation of the exchanger, by making imprints on the tubes modifying their thickness, by embossing, without removal of material.
  • the individual marking of each of the tubes which can be done either at the time of assembly of the steam generator, or even from the individual manufacture of the tubes, authorizes in all cases the identification of each of the tubes of a completely exchanger. throughout the life of it. An appreciable saving of time, as well as a considerably less exposure of the personnel to the radiations are thus obtained, after a prior learning operation has been carried out, immediately after the manufacture of the steam generator, so as to associate with each of the tracking codes tubes of the position coordinates of the ends of the tubes on the tube plate.
  • the marking of the tubes is carried out by making imprints modifying their thickness by embossing, without removal of material, it is possible to ensure the reading of the individual code assigned to each of the tubes using the current probe Foucault which also ensures the control of the tubes. No additional operation is thus necessary.
  • the individual identification code of each of the tubes is a bar code, which includes a preset number of signs regularly spaced along the axis of the tube, each sign being chosen from two signs, one of which is a circular imprint and the other of which is an absence of imprint.
  • the method according to the invention consists in marking the parts d 'end of each of the tubes by an individual code comprising the same identification code of the tube and a branch identification code.
  • the sign closest to the end of the tube may constitute the code for locating the branch.
  • the individual identification code is advantageously marked on the end of each of the tubes which is embedded in the tube plate.
  • the individual code is marked on an external surface of each of the tubes, during the manufacture of the latter.
  • this solution makes it possible to relax the tubes by heat treatment during their manufacture, in order to remove any residual stresses created in the marking areas.
  • the individual code is marked on an inner surface of each of the tubes, after the fixing of the latter in the tube plate.
  • Each of the individual tubes of a steam generator has the shape of a U-shaped tube, this U being in the inverted position when the steam generator is in operation.
  • almost all the tubes have different dimensional characteristics, depending on their location inside the steam generator. In particular, the radius of curvature of the central part of the tube and the length of the hot and cold branches of each tube varies practically from one tube to another.
  • this tube is marked, on its end portions, by means of an individual bar code 12a, 12b, which we will see below that it includes, for a given tube 10, the same identification code, as well as a code for identifying the branch concerned.
  • Barcode marking is obtained by making impressions, by embossing without removing material, so that the thickness of the tube is slightly reduced at the places where impressions are made.
  • Each of the imprints used to produce the bar codes 12a and 12b is a circular imprint 24, produced on a complete or partial circumference of the tube, and the depth of which can in particular be a few hundredths of mm while having the minimum functional thickness of resistance tube mechanics.
  • each of the tubes 10 can be marked on the external surface of the latter, since they are not yet mounted in the plate steam generator tubes.
  • the marking tool 14 is then a rotary tool, able to be mounted on the tube 10 and provided with marking rollers capable of making the desired impressions.
  • This marking tool 14 is advantageously mounted on a carrier (not shown) for controlling coordinates, making it possible to place the imprints of the bar codes 12a and 12b in very precise locations relative to the ends of the tube 10. In fact, the location of each of the imprints 24 is decisive for the reading of the bar code.
  • the end parts of the tubes 10 on which the individual bar codes 12a and 12b are marked correspond to the parts of the tubes 10 intended to be embedded in the tube plate 16 of the generator steam.
  • the marking area identified by the letter M in FIG. 3, is intended to be located inside the bore 20 of the tube plate 16, in which the end portion of the tube is received. 10.
  • This marking area M is delimited between the region immediately adjacent to the weld 18, by which the end of the tube 10 is fixed on the lower face of the plate 16, on the side of the primary water, and the region adjacent to the upper face of the plate 16, corresponding to the expansion zone of the expansion of the tube 10 inside the bore 20, on the side of the secondary water. Indeed, these two regions constitute the sensitive parts of the connection of the tube 10 on the plate 16, which it is important not to weaken by the marking of the tubes.
  • each of the tubes individually identified by its code is fixed to the tube plate 16, in the bores 20 intended to receive it, by carrying out the welding 18, then by expansion , according to the usual technique.
  • Each of the tubes 10 and the two bores 20 associated therewith thus create an inseparable assembly, individually identified by the code marked on the end of the tube.
  • Computer mapping is then carried out in the factory, or after the steam generator is installed in the nuclear power plant, in order to associate at each individual bar code, position information, in Cartesian coordinates, representative of the position on the tube plate 16 of the end of the tube 10 carrying this code, and of the bore 20 in which this end is received. Monitoring and management of each of the tubes throughout its life, from its manufacture to the shutdown of the steam generator, can thus be ensured.
  • This first embodiment of the invention also makes it possible to ensure good protection of the marking area which is located as illustrated in the figure. 3 in part M, deemed waterproof.
  • This embodiment also has the advantage of not modifying the manufacturing cycles of the steam generators and of allowing, if necessary, the stress relieving of the marking zones, by heat treatment or others, during the manufacture of the tubes, if turns out that the marking creates residual stresses in the tubes.
  • the marking of the tubes is only carried out after the latter have been fixed to the tube plate of the steam generator, that is to say in the factory, when the manufacture of the device, either directly in nuclear power plants on steam generators already in operation.
  • FIGS. 2A and 2B illustrate more precisely the case where the marking of the tubes is carried out immediately after their mounting on the tube plate 16.
  • the tubes 10 then arrive at the assembly plant for the generators steam each equipped with their locating label 22, in accordance with the technique currently used.
  • the tube 10 is placed in the appropriate bores 20 of the tube plate 16, as illustrated in FIG. 2B, it is fixed in this plate according to the usual technique, by welding and then expansion.
  • An individual bar code is then marked inside the end part of each of the branches of the tube which is located in the area M in FIG. 3, in accordance with the tracking codes initially carried on the labels 22.
  • the marking tool 14 ′ can be in the form of a special dudgeon or an expandable ring provided with a shell containing a marking punch.
  • the latter is mounted on a carrier (not shown) for controlling coordinates such as a robot.
  • the marking tool is mounted on a carrier capable of moving under the tube plate, according to a technique comparable to that of the machines which support the eddy current control probes and equivalent systems, during control operations at the plant site.
  • this coding operating according to the bar code principle, is based on the production of indentations 24, of circular shape and having in section a geometry, completely reproducible, determined by the type of tool used for carry out the marking.
  • the particular coding proposed here is based on the use of a single type of imprint 24, capable of being decoded by all or nothing during the passage of an eddy current probe also used to control the corresponding tube.
  • the bar code which is carried on each of the end parts M (FIG. 3) of each of the tubes 10 comprises a predetermined number of signs regularly spaced apart by a known distance, these signs being able to be according to the case either a circular imprint 24, or an absence of imprint.
  • the position of each of the signs relative to the end of the tube is also known.
  • each of the tubes of a steam generator comprising around 5600 tubes can thus be identified using a code consisting of thirteen signs consecutive, regularly spaced, each formed either of a footprint 24 or an absence of footprint. To facilitate reading, only six signs have been shown in Figure 4.
  • one of the signs for example the closest to the end of the tube 10, identified by the letters CRB in FIG. 4, corresponds to a code for locating the concerned branch of the tube 10, an absence of imprint corresponding for example to the cold branch, while an imprint 24 corresponds to the hot branch.
  • the rest of the signs contained in each of the individual codes 12a and 12b is moreover identical and corresponds to the identification code of the tube, identified by the letters CIT in FIG. 4.
  • This acquisition operation is illustrated diagrammatically in FIG. 5 by the arrow 30, which connects the eddy current probe 26 to an acquisition circuit 32 signals delivered by the probe 28.
  • the acquisition circuit 32 communicates to a computer 34 coding signals 36, to which the computer 34 assigns a position, in Cartesian coordinates, from a coordinate table. The desired cartography is thus stored.
  • a message of position 38 corresponding to the desired tube is sent to the computer 34, as symbolized by the arrow 36 in FIG. 5. From this message, the computer consults the map previously acquired, to control an automatic movement of the carrier 30 towards the desired position, by acting on the control members 40 of the carrier.
  • the invention is not limited to the embodiments which have just been described by way of examples.
  • the invention can also be applied to the individual identification of the tubes of a heat exchanger comprising a bundle of straight tubes, the ends of which are fixed on two opposite tube plates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP92402692A 1991-10-02 1992-10-01 Procédé de repérage individuel des tubes d'un échangeur de chaleur Expired - Lifetime EP0536053B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9112129 1991-10-02
FR9112129A FR2682179B1 (fr) 1991-10-02 1991-10-02 Procede de reperage individuel des tubes d'un echangeur de chaleur.

Publications (2)

Publication Number Publication Date
EP0536053A1 EP0536053A1 (fr) 1993-04-07
EP0536053B1 true EP0536053B1 (fr) 1997-03-05

Family

ID=9417513

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92402692A Expired - Lifetime EP0536053B1 (fr) 1991-10-02 1992-10-01 Procédé de repérage individuel des tubes d'un échangeur de chaleur

Country Status (11)

Country Link
US (1) US5321887A (zh)
EP (1) EP0536053B1 (zh)
JP (1) JPH05223479A (zh)
KR (1) KR930008425A (zh)
CN (1) CN1070261A (zh)
CA (1) CA2079559A1 (zh)
DE (1) DE69217798T2 (zh)
ES (1) ES2101060T3 (zh)
FR (1) FR2682179B1 (zh)
TW (1) TW199932B (zh)
ZA (1) ZA927554B (zh)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20313856U1 (de) * 2003-09-06 2005-01-13 Weidmüller Interface GmbH & Co. KG Drucker und Markierer zum Markieren elektrischer Geräte, Verbinder, Kabel o.dgl.
US6959267B2 (en) * 2004-01-09 2005-10-25 Westinghouse Electric Co. Llc Method of inspecting a heat exchanger and computer program product for facilitating same
TWI256908B (en) * 2004-06-30 2006-06-21 Hwei Implements Mfg Corp Ing Method for forming three-dimensional mark on cylindrical tool and mark mold
US20060103516A1 (en) * 2004-11-15 2006-05-18 Zang De Y Infant car seat alarm system and method
JP4506766B2 (ja) * 2007-02-22 2010-07-21 住友金属工業株式会社 Ｕベンド管のマーキング方法およびオンライン精整処理設備
FR2945138B1 (fr) * 2009-04-29 2011-05-13 Hms 634 Ltd Systeme d'identification de jonctions d'elements a assembler destines a former un montage tel que notamment un pipeline ou un reservoir et procede d'identification mis en oeuvre dans un tel systeme
US20110125462A1 (en) * 2009-05-14 2011-05-26 Westinghouse Electric Company Llc Tetherless tube inspection system
US10896767B2 (en) * 2011-04-07 2021-01-19 Westinghouse Electric Company Llc Method of detecting an existence of a loose part in a steam generator of a nuclear power plant
EP2775364B1 (en) * 2011-11-02 2019-10-30 Nippon Steel Corporation Steel tube production control method
US10486222B2 (en) * 2014-12-23 2019-11-26 Cms Costruzione Macchine Speciali S.R.L. Horizontal expanding machine
JP6723636B2 (ja) * 2016-02-04 2020-07-15 三菱重工業株式会社 識別システム、及び識別方法
JP7187179B2 (ja) * 2018-05-24 2022-12-12 三菱重工業株式会社 管理システム、原子力プラント用のボルト、及び管理方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600254A (en) * 1947-03-20 1952-06-10 Lysobey John Wall treatment of tubing
US3440705A (en) * 1966-08-31 1969-04-29 Storm Products Co Method of making a printing wheel for printing a code on insulated wire
US3815493A (en) * 1972-10-02 1974-06-11 Johnson & Johnson Method and apparatus for embossing tubular items having an open end
JPS542257A (en) * 1977-06-08 1979-01-09 Tomizawa Seimitsukan Yuugen Method of making small pipe having impressed marks
US4278044A (en) * 1978-12-11 1981-07-14 Davis, French And Associates, Inc. Remote marking tool
DE3619643C2 (de) * 1985-06-22 1996-01-11 Schwarze Rigobert Rohrbiegemaschine
US4780009A (en) * 1987-04-27 1988-10-25 Combustion Engineering, Inc. Steam generator tube sheet automatic stamping device
US4779437A (en) * 1987-07-30 1988-10-25 Metal Masters Foodservice Equipment Grooving and stamping method and apparatus
FR2623279B1 (fr) * 1987-11-13 1990-04-06 Electricite De France Procede et appareil de marquage de tube d'echangeur a plaque tubulaire
US5009093A (en) * 1989-10-20 1991-04-23 Quinn Jr F Dillard Apparatus and method for roll forming and marking sheet metal

Also Published As

Publication number Publication date
ZA927554B (en) 1993-04-14
US5321887A (en) 1994-06-21
TW199932B (zh) 1993-02-11
ES2101060T3 (es) 1997-07-01
DE69217798D1 (de) 1997-04-10
FR2682179A1 (fr) 1993-04-09
JPH05223479A (ja) 1993-08-31
DE69217798T2 (de) 1997-08-28
KR930008425A (ko) 1993-05-21
EP0536053A1 (fr) 1993-04-07
CN1070261A (zh) 1993-03-24
CA2079559A1 (en) 1993-04-03
FR2682179B1 (fr) 1993-11-12

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