EP0387131A1 - Apparatus for the stabilization of the tubes of a steam generator tube bundle comprising antivibration bars - Google Patents

Apparatus for the stabilization of the tubes of a steam generator tube bundle comprising antivibration bars Download PDF

Info

Publication number
EP0387131A1
EP0387131A1 EP90400573A EP90400573A EP0387131A1 EP 0387131 A1 EP0387131 A1 EP 0387131A1 EP 90400573 A EP90400573 A EP 90400573A EP 90400573 A EP90400573 A EP 90400573A EP 0387131 A1 EP0387131 A1 EP 0387131A1
Authority
EP
European Patent Office
Prior art keywords
tubes
bundle
bun
vibration bars
steam generator
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
EP90400573A
Other languages
German (de)
French (fr)
Other versions
EP0387131B1 (en
Inventor
Bernard Monnier
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 EP0387131A1 publication Critical patent/EP0387131A1/en
Application granted granted Critical
Publication of EP0387131B1 publication Critical patent/EP0387131B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F28D7/06—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 the conduits having a single U-bend
    • 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
    • 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
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/20—Supporting arrangements, e.g. for securing water-tube sets
    • F22B37/205—Supporting and spacing arrangements for tubes of a tube bundle
    • F22B37/206—Anti-vibration supports for the bends of U-tube steam generators

Definitions

  • the invention relates to a device for stabilizing the tubes of the bundle of a steam generator comprising antivibration bars interposed between curved parts of the tubes of the steam generator.
  • the steam generators in particular the steam generators of the pressurized water nuclear reactors comprise bent U-shaped tubes having two straight branches crimped at their ends in a tubular plate.
  • the curved parts of the bundle tubes which are juxtaposed at its upper part have radii of curvature different from each other and are placed adjacent to form a structure of substantially hemispherical shape called a bun.
  • the circulation of fluid in contact with the tubes can cause vibrations which are liable to cause damage to these tubes if they are not effectively maintained.
  • the right part of the tubes is engaged in spacers located at regular distances from each other according to the height of the beam. These straight parts are therefore effectively maintained by rigid elements.
  • the curved parts of the bundle tubes constituting the bun must also be maintained and generally used for this, spacer bars which are interposed between the adjacent tubes of the bundle and arranged in substantially radial directions of the bun. These spacer bars are generally connected two by two in an articulated manner at one of their ends arranged towards the inside of the bun and placed in an angular manner to form V-shaped structures.
  • the ends of the antivibration bars opposite their articulated ends are generally projecting from the tubes constituting the outer layer of the bun.
  • Anti-takeoff stabilization devices are also known for the curved parts of the bundle tubes, which consist of stirrups engaged on the last row of tubes and the ends of which protrude from the surface of the bun can be fixed by welding to elements. of maintenance of anti-vibration bars located for example in meridian planes.
  • Structures are also known for holding the tubes of a steam generator in the area of the bun constituted by arches in the form of ring portions surrounding the external surface of the bun and arranged along meridian planes of the bun all passing through the same diameter parallel to the rows of tubes.
  • the arches have cutouts allowing them to adapt perfectly to the upper shape of the bun and are rigidly connected together by hoops of direction perpendicular to the arches which are screwed onto these arches.
  • the whole of the arches and the hoops constitutes a structure which rests freely on the bun. This structure is maintained on the bun, under the effect of its own weight.
  • the object of the invention is therefore to propose a device for stabilizing the tubes of the bundle of a steam generator comprising antivibration bars inserted between curved parts of the tubes of the steam generator bent in a U shape, these tubes having two straight crimped arms at their ends in a tubular plate, the curved parts of the bundle tubes having radii of curvature different from each other and being placed adjacent to form a substantially hemispherical structure called a bun and separated by anti-vibration bars arranged in substantially radial directions each between the curved parts of the bundle tubes in adjacent position and shaped arches ring portions surrounding the surface of the bun, arranged in planes all passing through the same diameter of the bun and connected by hoops perpendicular to the arches, this stabilization device making it possible to quickly and easily fix the anti-vibration bars on the structure formed by hoops and hoops.
  • each of the hoops comprises a plurality of fixing brackets integral with the hoops of direction perpendicular to the hoops and relative to the anti-vibration bars which are each fixed by an external end to a bracket or a hoop by mechanical screwing means .
  • the envelope 2 contains the bundle of tubes of the steam generator constituted by tubes 5 bent in a U shape and comprising, at their upper part, semicircular hangers with radius of curvature decreasing from the outside to the inside and constituting the steam generator bun.
  • the straight parts 5a of the bundle tubes are crimped at their ends in the tube plate 3, so as to open into a water box 7 in two parts separated by a partition 8.
  • the pressurized water from the nuclear reactor enters one of the parts of the water box 7 through an inlet pipe 6a, flows through the tubes of the bundle then exits through an outlet pipe 6b.
  • the bundle of tubes 5 is surrounded by a bundle envelope 9 making it possible to channel the feed water entering the envelope of the steam generator by an inlet pipe 11.
  • the feed water of the steam generator circulates first from top to bottom in the annular space located around the bundle envelope 9 then from bottom to top in contact with the tubes 5 of the bundle so as to heat up then to vaporize and to come out in the form of vapor by the upper tube 12 of the steam generator.
  • the upper part of the bundle of tubes 5 is constituted by the juxtaposition of hangers of semi-circular shape whose radii are decreasing from the outside towards the inside of the bundle.
  • the different successive layers of tubes of the bundle parallel to the central layer shown in FIG. 1 include hangers of decreasing diameter, so that the upper part of the bundle constitutes a substantially hemispherical assembly called a bun.
  • the rectilinear part 5a of the tube 5 is held by spacer plates 10 which prevent the tubes from being vibrated when the steam generator is in operation, under the effect of the circulation of exchange fluids.
  • the curved parts of the tubes situated at the upper end of the bundle are held by anti-vibration bars 15 formed in the form of compasses hinged at their inner end 15a and introduced between the successive rows of tubes 5 at the level of the hangers.
  • the device for holding the upper part of the bundle comprises arches 16 on which brackets 17 are fixed perpendicular to the arches.
  • the arches are arranged substantially along diametrical planes of the bun all passing through the same diameter corresponding to the transverse direction of the beam parallel to the water street disposed between the small hangers in the internal part of this beam.
  • the arches 16 have cutouts and deflections allowing them to adapt to the external shape of the bun.
  • the arches 16 are interconnected by hoops 18 bolted to the arches and which maintain the entire structure of the arches which rests on the upper end of the bun.
  • the holding assembly constituted by the arches 16 and the hoops 18 is held on the bun, under the effect of its own weight.
  • Certain anti-vibration bars 5 are connected directly to the hoops 18 by screw connections which will be described in more detail in the following text.
  • the hoops 18 have a shape of an arc and are arranged in parallel vertical planes to the layers of tubes.
  • FIG. 6 a first type of bracket 17 is seen allowing the fixing of an anti-vibration bar 15, the bracket 17 being connected by screw connections 20 at the end of a hoop 16.
  • the anti-vibration bar 15 On the bracket 17 is fixed a pin 21 and the anti-vibration bar 15 carries an end cap 22 which can be engaged laterally on the pin 21.
  • the tightening and fixing of the anti-vibration bar is ensured by a screw and cup assembly 23 ensuring the tightening of two jaws of the yoke 22 on the journal 21.
  • the screw head is blocked in rotation by a cup which can be folded down in cavities in the screw head.
  • the bracket 17 ′ allows the attachment of two anti-vibration bars 15a and 15b by means of yokes 22a and 22b engaged on corresponding pins 21a and 21b integral with the yoke 17 ′.
  • the anti-vibration bars are engaged laterally on the corresponding pins 21a, 21b and clamped in place by screw connections 23a and 23b.
  • Certain anti-vibration bars 15 are fixed to a pin secured to a hoop 18.
  • the assembly of the holding structure constituted by the arches 16, the hoops 18 and the brackets for fixing the anti-vibration bars is integral with the set of anti-vibration bars which constitute a structure of great stability resting on the part top of the steam generator bun.
  • a retaining stirrup 25 constituted in the form of a comb, the successive spaces 26 of which are inserted between two successive teeth 27 have a width slightly greater than the diameter of the tubes 5 of the steam generator.
  • the comb 25 has end portions 28 pierced with fixing holes 29 and each of the teeth 27 likewise has an oblong hole 30 allowing the fixing of the comb below the last row of tubes of the steam generator, as will be explained below,
  • the upper row 31 of the hangers of the tubes 5 of the bundle comprises a number of hangers identical to the number of spaces 26 located between the teeth of the peinge 25.
  • the comb 25 can be used to hold the anti-vibration bars anti-take-off by being slid in a horizontal position below the row 31 so that the spaces 26 correspond to the positions of the upper hangers of the tubes 5.
  • the comb 25 is then turned 90 ° upwards so that its end portions 28 and its teeth 27 come into coincidence with one face of the arch 16 located immediately above the row of hangers 31.
  • the roll bar 16 has ve holes coming in coincidence with the holes 29 and pins coming in coincidence with the holes 27 for the positioning and fixing by screwing of the comb on the hoop 16.
  • the comb 25 thus provides anti-theft retention of the anti-vibration bars.
  • the positioning and fixing of the comb can be carried out quickly and efficiently, without requiring any welding operation.
  • the structure constituted by the hoops and the hoops may be different from that which has been described and may include any number of hoops or hoops. It is possible, in particular, to use more than two hoops in one or more parts.
  • the comb-shaped stirrups will preferably be placed on the arches located towards the center of the steam generator's bun, but it is also possible to have such anti-take-off stirrups on all the arches of the holding structure.
  • the invention applies to all steam generators comprising an upper part constituting a bun of substantially hemispherical shape on which is placed a holding structure comprising hoops and hoops.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Supports For Pipes And Cables (AREA)

Abstract

On the hemispherical dome forming the upper part of the bundle of the steam generator is placed a structure consisting of bows (16) in the form of ring portions and connecting straps (18). The anti-vibration bars (15), which are introduced between two layers of adjacent tubes (5) of the bundle, are connected at their outer end to brackets (17) fastened to the bows (16) in a perpendicular direction. Some anti-vibration bars are fastened to the straps (18). The anti-vibration bars are fastened to the brackets (17) or straps (18) by means of screwed connections. The stabilising device according to the invention can also comprise a comb-shaped anti-flyoff yoke which can be introduced under the tubes arranged in the upper part of the dome and then rotated through 90 DEG so as to be fastened to a bow (16). <IMAGE>

Description

L'invention concerne un dispositif de stabilisation des tubes du faisceau d'un générateur de vapeur comportant des barres antivibratoires interca­lées entre des parties courbes des tubes du générateur de vapeur.The invention relates to a device for stabilizing the tubes of the bundle of a steam generator comprising antivibration bars interposed between curved parts of the tubes of the steam generator.

Les générateurs de vapeur, en particulier les générateurs de vapeurs des réacteurs nucléaires à eau sous pression comportent des tubes cintrés en U présentant deux branches droites serties à leurs ex­trémités dans une plaque tubulaire. Les parties cour­bes des tubes du faisceau qui sont juxtaposées à sa partie supérieure présentent des rayons de courbure différents les uns des autres et sont placées de ma­nière adjacente pour constituer une structure de forme sensiblement hémisphérique appelée chignon.The steam generators, in particular the steam generators of the pressurized water nuclear reactors comprise bent U-shaped tubes having two straight branches crimped at their ends in a tubular plate. The curved parts of the bundle tubes which are juxtaposed at its upper part have radii of curvature different from each other and are placed adjacent to form a structure of substantially hemispherical shape called a bun.

Pendant le fonctionnement du générateur de vapeur, de l'eau sous pression à haute température circule dans les tubes du faisceau et de l'eau ali­mentaire est amenée au contact de la surface exté­rieure de ces tubes le long desquels elle se déplace dans la direction verticale en s'échauffant puis en se vaporisant, pour ressortir sous forme de vapeur à la partie supérieure du générateur.During operation of the steam generator, high temperature pressurized water flows through the bundle tubes and potable water is brought into contact with the outer surface of these tubes along which it moves in the vertical direction by heating and then vaporizing, to come out in the form of vapor at the top of the generator.

La circulation de fluide au contact des tu­bes peut provoquer des vibrations qui sont suscepti­bles d'entraîner des détériorations de ces tubes s'ils ne sont pas maintenus de manière efficace.The circulation of fluid in contact with the tubes can cause vibrations which are liable to cause damage to these tubes if they are not effectively maintained.

La partie droite des tubes est engagée dans des entretoises situées à des distances régulières les unes des autres suivant la hauteur du faisceau. Ces parties droites sont donc maintenues de manière effi­cace par des éléments rigides. Les parties courbes des tubes du faisceau constituant le chignon doivent éga­lement être maintenues et l'on utilise généralement pour cela des barres entretoises qui sont intercalées entre les tubes adjacents du faisceau et disposées suivant des directions sensiblement radiales du chi­gnon. Ces barres entretoises sont généralement reliées deux à deux de manière articulée à l'une de leurs ex­trémités disposée vers l'intérieur du chignon et pla­cées de manière angulaire pour constituer des structu­res en forme de V.The right part of the tubes is engaged in spacers located at regular distances from each other according to the height of the beam. These straight parts are therefore effectively maintained by rigid elements. The curved parts of the bundle tubes constituting the bun must also be maintained and generally used for this, spacer bars which are interposed between the adjacent tubes of the bundle and arranged in substantially radial directions of the bun. These spacer bars are generally connected two by two in an articulated manner at one of their ends arranged towards the inside of the bun and placed in an angular manner to form V-shaped structures.

Les extrémités des barres antivibratoires opposées à leurs extrémités articulées entre elles sont généralement saillantes par rapport aux tubes constituant la couche externe du chignon.The ends of the antivibration bars opposite their articulated ends are generally projecting from the tubes constituting the outer layer of the bun.

On a proposé divers moyens de fixation de ces extrémités des barres antivibratoires sur des élé­ments de fixation placés sur la surface supérieure du chignon.Various means of fixing these ends of the anti-vibration bars have been proposed on fixing elements placed on the upper surface of the bun.

On a par exemple proposé de souder les ex­trémités des barres antivibratoires sur des éléments courbes disposés suivant des plans méridiens du chi­gnon.For example, it has been proposed to weld the ends of the anti-vibration bars on curved elements arranged along meridian planes of the bun.

On a également proposé de fixer les extrémi­tés des barres antivibratoires, par exemple par sou­dure sur des anneaux sensiblement parallèles reposant sur la surface supérieure du chignon.It has also been proposed to fix the ends of the anti-vibration bars, for example by welding on substantially parallel rings resting on the upper surface of the bun.

Dans tous les cas, la fixation des barres antivibratoires nécessite des opérations complexes mettant le plus souvent en oeuvre des soudures qui doivent être effectuées au voisinage des tubes du faisceau.In all cases, the fixing of the antivibration bars requires complex operations most often using welds which must be carried out in the vicinity of the tubes of the bundle.

On connaît également des dispositifs de stabilisation anti-envol des parties courbes des tubes du faisceau qui sont constitués par des étriers enga­gés sur la dernière rangée de tubes et dont les extré­mités saillantes par rapport à la surface du chignon peuvent être fixées par soudure sur des éléments de maintien des barres antivibratoires situés par exemple dans des plans méridiens.Anti-takeoff stabilization devices are also known for the curved parts of the bundle tubes, which consist of stirrups engaged on the last row of tubes and the ends of which protrude from the surface of the bun can be fixed by welding to elements. of maintenance of anti-vibration bars located for example in meridian planes.

On connaît également des structures de main­tien des tubes d'un générateur de vapeur dans la zone du chignon constituées par des arceaux en forme de portions d'anneau entourant la surface externe du chi­gnon et disposés suivant des plans méridiens du chi­gnon passant tous par un même diamètre parallèle aux rangées de tubes. Les arceaux comportent des découpes leur permettant de s'adapter parfaitement à la forme supérieure du chignon et sont reliés entre eux de ma­nière rigide par des cerces de direction perpendicu­laire par rapport aux arceaux qui sont vissées sur ces arceaux.Structures are also known for holding the tubes of a steam generator in the area of the bun constituted by arches in the form of ring portions surrounding the external surface of the bun and arranged along meridian planes of the bun all passing through the same diameter parallel to the rows of tubes. The arches have cutouts allowing them to adapt perfectly to the upper shape of the bun and are rigidly connected together by hoops of direction perpendicular to the arches which are screwed onto these arches.

L'ensemble des arceaux et des cerces consti­tue une structure qui repose librement sur le chignon. Cette structure est maintenue sur le chignon, sous l'effet de son propre poids.The whole of the arches and the hoops constitutes a structure which rests freely on the bun. This structure is maintained on the bun, under the effect of its own weight.

Dans certaines réalisations, on a prévu de percer des trous dans les arceaux pour y engager les barres antivibratoires qui peuvent être maintenues par des liaisons vissées.In certain embodiments, provision has been made to drill holes in the arches in order to engage the anti-vibration bars which can be maintained by screw connections.

Cette disposition n'est pas satisfaisante dans la mesure où l'engagement des barres antivibra­toires dans les arceaux est une opération délicate à réaliser.This arrangement is not satisfactory insofar as the engagement of the anti-vibration bars in the arches is a delicate operation to perform.

Le but de l'invention est donc de proposer un dispositif de stabilisation des tubes du faisceau d'un générateur de vapeur comportant des barres anti­vibratoires intercalées entre des parties courbes des tubes du générateur de vapeur cintrés en U, ces tubes présentant deux branches droites serties à leurs ex­trémités dans une plaque tubulaire, les parties cour­bes des tubes du faisceau ayant des rayons de courbure différents les uns des autres et étant placés de ma­nière adjacente pour constituer une structure de forme sensiblement hémisphérique appelée chignon et séparés par des barres antivibratoires disposées dans des di­rections sensiblement radiales chacune entre les par­ties courbes de tubes du faisceau en position adja­cente et des arceaux en forme de portions d'anneau en­tourant la surface du chignon, disposés suivant des plans passant tous par un même diamètre du chignon et reliés par des cerces perpendiculaires aux arceaux, ce dispositif de stabilisation permettant de fixer rapi­dement et facilement les barres antivibratoires sur la structure formée par les arceaux et les cerces.The object of the invention is therefore to propose a device for stabilizing the tubes of the bundle of a steam generator comprising antivibration bars inserted between curved parts of the tubes of the steam generator bent in a U shape, these tubes having two straight crimped arms at their ends in a tubular plate, the curved parts of the bundle tubes having radii of curvature different from each other and being placed adjacent to form a substantially hemispherical structure called a bun and separated by anti-vibration bars arranged in substantially radial directions each between the curved parts of the bundle tubes in adjacent position and shaped arches ring portions surrounding the surface of the bun, arranged in planes all passing through the same diameter of the bun and connected by hoops perpendicular to the arches, this stabilization device making it possible to quickly and easily fix the anti-vibration bars on the structure formed by hoops and hoops.

Dans ce but, chacun des arceaux comporte une pluralité de potences de fixation solidaires des ar­ceaux de direction perpendiculaire par rapport aux ar­ceaux et par rapport aux barres antivibratoires qui sont fixées chacune par une extrémité externe à une potence ou une cerce par des moyens mécaniques de vis­sage.For this purpose, each of the hoops comprises a plurality of fixing brackets integral with the hoops of direction perpendicular to the hoops and relative to the anti-vibration bars which are each fixed by an external end to a bracket or a hoop by mechanical screwing means .

Afin de bien faire comprendre l'invention, on va maintenant décrire, à titre d'exemple non limi­tatif, en se référant aux figures jointes en annexe, un mode de réalisation d'un dispositif de stabilisa­tion suivant l'invention des tubes du faisceau d'un générateur de vapeur d'un réacteur nucléaire à eau sous pression.

  • La figure 1 est une vue en élévation écor­chée et coupe partielle d'un générateur de vapeur d'un réacteur nucléaire à eau sous pression comportant un dispositif de stabilisation des tubes du faisceau sui­vant l'invention.
  • La figure 2 est une vue de face à plus gran­de échelle de la partie supérieure du faisceau.
  • La figure 3 est une vue partielle en pers­pective du dispositif de stabilisation suivant l'in­vention.
  • La figure 4 est une demi-vue de dessus des arceaux et des cerces sur lesquels sont fixées les barres antivibratoires.
  • La figure 5 est une vue en coupe par un plan de symétrie de la partie supérieure du faisceau du gé­nérateur de vapeur montrant les dispositifs de fixa­tion des barres antivibratoires sur un arceau.
  • La figure 6 est une vue de détail d'un dis­positif de fixation d'une barre antivibratoire sur une potence, suivant un premier mode de réalisation.
  • La figure 7 est une vue de détail des moyens de fixation de deux barres antivibratoires sur une potence suivant un second mode de réalisation.
  • La figure 8 est une vue de face d'un étrier de maintien anti-envol des tubes supérieurs du chignon d'un générateur de vapeur, suivant l'invention.
In order to clearly understand the invention, we will now describe, by way of nonlimiting example, with reference to the attached figures, an embodiment of a stabilization device according to the invention of the tubes of the beam d '' a steam generator of a pressurized water nuclear reactor.
  • Figure 1 is a sectional elevation view in partial section of a steam generator of a pressurized water nuclear reactor comprising a device for stabilizing the bundle tubes according to the invention.
  • Figure 2 is a front view on a larger scale of the upper part of the beam.
  • Figure 3 is a partial perspective view of the stabilization device according to the invention.
  • Figure 4 is a half top view of the arches and hoops on which are fixed the anti-vibration bars.
  • Figure 5 is a sectional view through a plane of symmetry of the upper part of the bundle of the steam generator showing the devices for fixing the anti-vibration bars on a hoop.
  • Figure 6 is a detail view of a device for fixing an anti-vibration bar on a bracket, according to a first embodiment.
  • Figure 7 is a detail view of the means for fixing two antivibration bars on a bracket according to a second embodiment.
  • Figure 8 is a front view of a stirrup anti-takeoff of the upper tubes of the bun of a steam generator, according to the invention.

Sur la figure 1, on voit un générateur de vapeur d'un réacteur nucléaire à eau sous pression dé­signé de manière générale par le repère 1 et compor­tant une enveloppe externe 2 reliée à sa partie infé­rieure à une plaque tubulaire 3 de forte épaisseur.In Figure 1, we see a steam generator of a pressurized water nuclear reactor generally designated by the reference 1 and having an outer casing 2 connected at its lower part to a tubular plate 3 of great thickness.

L'enveloppe 2 renferme le faisceau de tubes du générateur de vapeur constitué par des tubes 5 cin­trés en U et comportant, à leur partie supérieure, des cintres semi-circulaires de rayon de courbure décrois­sant de l'extérieur vers l'intérieur et constituant le chignon du générateur de vapeur.The envelope 2 contains the bundle of tubes of the steam generator constituted by tubes 5 bent in a U shape and comprising, at their upper part, semicircular hangers with radius of curvature decreasing from the outside to the inside and constituting the steam generator bun.

Les parties droites 5a des tubes du faisceau sont serties à leurs extrémités dans la plaque tubu­laire 3, de manière à déboucher dans une boîte à eau 7 en deux parties séparées par une cloison 8.The straight parts 5a of the bundle tubes are crimped at their ends in the tube plate 3, so as to open into a water box 7 in two parts separated by a partition 8.

L'eau sous pression du réacteur nucléaire pénètre dans une des parties de la boîte à eau 7 par une tubulure d'entrée 6a, circule dans les tubes du faisceau puis ressort par une tubulure de sortie 6b.The pressurized water from the nuclear reactor enters one of the parts of the water box 7 through an inlet pipe 6a, flows through the tubes of the bundle then exits through an outlet pipe 6b.

Le faisceau de tubes 5 est entouré par une enveloppe de faisceau 9 permettant de canaliser l'eau d'alimentation pénétrant dans l'enveloppe du généra­teur de vapeur par une tubulure d'arrivée 11. L'eau d'alimentation du générateur de vapeur circule d'abord de haut en bas dans l'espace annulaire situé autour de l'enveloppe de faisceau 9 puis de bas en haut en contact des tubes 5 du faisceau de manière à s'échauf­fer puis à se vaporiser et à ressortir sous forme de vapeur par la tubulure supérieure 12 du générateur de vapeur.The bundle of tubes 5 is surrounded by a bundle envelope 9 making it possible to channel the feed water entering the envelope of the steam generator by an inlet pipe 11. The feed water of the steam generator circulates first from top to bottom in the annular space located around the bundle envelope 9 then from bottom to top in contact with the tubes 5 of the bundle so as to heat up then to vaporize and to come out in the form of vapor by the upper tube 12 of the steam generator.

La partie supérieure du faisceau de tubes 5 est constituée par la juxtaposition de cintres de for­me semi-circulaire dont les rayons sont décroissants de l'extérieur vers l'intérieur du faisceau.The upper part of the bundle of tubes 5 is constituted by the juxtaposition of hangers of semi-circular shape whose radii are decreasing from the outside towards the inside of the bundle.

De plus, les différentes couches successives de tubes du faisceau parallèles à la couche centrale représentée sur la figure 1 comportent des cintres de diamètre décroissant, si bien que la partie supérieure du faisceau constitue un ensemble de forme sensible­ment hémisphérique appelé chignon.In addition, the different successive layers of tubes of the bundle parallel to the central layer shown in FIG. 1 include hangers of decreasing diameter, so that the upper part of the bundle constitutes a substantially hemispherical assembly called a bun.

La partie rectiligne 5a du tube 5 est main­tenue par des plaques entretoises 10 qui empêchent la mise en vibrations des tubes lorsque le générateur de vapeur est en service, sous l'effet de la circulation des fluides d'échange.The rectilinear part 5a of the tube 5 is held by spacer plates 10 which prevent the tubes from being vibrated when the steam generator is in operation, under the effect of the circulation of exchange fluids.

Les parties cintrées des tubes situés à l'extrémité supérieure du faisceau sont maintenues par des barres antivibratoires 15 constituées sous la forme de compas articulés à leur extrémité intérieure 15a et introduites entre les rangées de tubes 5 suc­cessives au niveau des cintres.The curved parts of the tubes situated at the upper end of the bundle are held by anti-vibration bars 15 formed in the form of compasses hinged at their inner end 15a and introduced between the successive rows of tubes 5 at the level of the hangers.

De plus, le dispositif de maintien de la partie supérieure du faisceau comporte des arceaux 16 sur lesquels sont fixées des potences 17 perpendicu­laires aux arceaux. Les arceaux sont disposés sensi­blement suivant des plans diamétraux du chignon pas­sant tous par un même diamètre correspondant à la di­rection transversale du faisceau parallèle à la rue d'eau disposée entre les petits cintres à la partie interne de ce faisceau.In addition, the device for holding the upper part of the bundle comprises arches 16 on which brackets 17 are fixed perpendicular to the arches. The arches are arranged substantially along diametrical planes of the bun all passing through the same diameter corresponding to the transverse direction of the beam parallel to the water street disposed between the small hangers in the internal part of this beam.

Comme il est visible sur les figures 2 et 3, les arceaux 16 présentent des découpes et des déflec­tions leur permettant de s'adapter à la forme exté­rieure du chignon.As can be seen in Figures 2 and 3, the arches 16 have cutouts and deflections allowing them to adapt to the external shape of the bun.

Les arceaux 16 sont reliés entre eux par des cerces 18 boulonnées sur les arceaux et qui assurent un maintien de l'ensemble de la structure des arceaux qui repose sur l'extrémité supérieure du chignon. L'ensemble de maintien constitué par les arceaux 16 et les cerces 18 est maintenu sur le chignon, sous l'ef­fet de son propre poids. Certaines barres antivibra­toires 5 sont reliées directement aux cerces 18 par des liaisons vissées qui seront décrites plus en dé­tail dans la suite du texte.The arches 16 are interconnected by hoops 18 bolted to the arches and which maintain the entire structure of the arches which rests on the upper end of the bun. The holding assembly constituted by the arches 16 and the hoops 18 is held on the bun, under the effect of its own weight. Certain anti-vibration bars 5 are connected directly to the hoops 18 by screw connections which will be described in more detail in the following text.

Sur la figure 4, on voit les quatre arceaux 16 constituant la structure de maintien supérieure du générateur de vapeur reliés entre eux par une cerce 18. Les cerces 18 ont une forme d'arc-de-cercle et sont disposées dans des plans verticaux parallèles aux nappes de tubes.In Figure 4, we see the four arches 16 constituting the upper holding structure of the steam generator connected together by a hoop 18. The hoops 18 have a shape of an arc and are arranged in parallel vertical planes to the layers of tubes.

Sur la figure 5, on voit un arceau 16 cons­titué de parties successives 16a, 16b, 16c reliées entre elles par des liaisons vissées.In Figure 5, we see a hoop 16 consisting of successive parts 16a, 16b, 16c connected together by screw connections.

On voit également deux cerces d'assemblage 18 de l'ensemble des arceaux sur lesquels sont fixées des barres antivibratoires 15 intercalées entre les rangées de tubes 5 du faisceau.We also see two assembly hoops 18 of all the hoops on which are fixed anti-vibration bars 15 interposed between the rows of tubes 5 of the bundle.

Les autres barres antivibratoires interca­lées entre les rangées de tubes 5 sont fixées sur les arceaux par l'intermédiaire de potences 17.The other anti-vibration bars inserted between the rows of tubes 5 are fixed to the arches by means of brackets 17.

Sur la figure 6, on voit un premier type de potence 17 permettant la fixation d'une barre antivi­bratoire 15, la potence 17 étant reliée par des liai­sons vissées 20 à l'extrémité d'un arceau 16.In FIG. 6, a first type of bracket 17 is seen allowing the fixing of an anti-vibration bar 15, the bracket 17 being connected by screw connections 20 at the end of a hoop 16.

Sur la potence 17 est fixé un tourillon 21 et la barre antivibratoire 15 porte une chape d'extré­mité 22 qui peut être engagée latéralement sur le tou­rillon 21. Le serrage et la fixation de la barre anti­vibratoire sont assurés par un ensemble à vis et cou­pelle 23 assurant le serrage de deux mors de la chape 22 sur le tourillon 21. La tête de vis est bloquée en rotation par une coupelle rabattable dans des cavités de la tête de vis.On the bracket 17 is fixed a pin 21 and the anti-vibration bar 15 carries an end cap 22 which can be engaged laterally on the pin 21. The tightening and fixing of the anti-vibration bar is ensured by a screw and cup assembly 23 ensuring the tightening of two jaws of the yoke 22 on the journal 21. The screw head is blocked in rotation by a cup which can be folded down in cavities in the screw head.

Sur la figure 7, on voit un second type de potence 17′ fixée par liaison vissée 20′ à l'extrémité supérieure d'un arceau 16.In FIG. 7, we see a second type of bracket 17 ′ fixed by screw connection 20 ′ to the upper end of a hoop 16.

La potence 17′ permet la fixation de deux barres antivibratoires 15a et 15b par l'intermédiaire de chapes 22a et 22b engagées sur des tourillons cor­respondants 21a et 21b solidaires de la chape 17′. Les barres antivibratoires sont engagées latéralement sur les tourillons 21a, 21b correspondants et serrées en place par des liaisons à vis 23a et 23b.The bracket 17 ′ allows the attachment of two anti-vibration bars 15a and 15b by means of yokes 22a and 22b engaged on corresponding pins 21a and 21b integral with the yoke 17 ′. The anti-vibration bars are engaged laterally on the corresponding pins 21a, 21b and clamped in place by screw connections 23a and 23b.

Certaines barres antivibratoires 15 sont fi­xées sur un tourillon solidaire d'une cerce 18.Certain anti-vibration bars 15 are fixed to a pin secured to a hoop 18.

Dans tous les cas, la mise en place et la fixation des barres antivibratoires peuvent être assu­rées de manière très rapide et sans nécessiter de sou­dure.In all cases, the establishment and fixing of the anti-vibration bars can be ensured very quickly and without requiring welding.

En outre, l'ensemble de la structure de maintien constitué par les arceaux 16, les cerces 18 et les potences de fixation des barres antivibratoires est solidaire de l'ensemble des barres antivibratoires qui constituent une structure d'une grande stabilité reposant sur la partie supérieure du chignon du géné­rateur de vapeur.In addition, the assembly of the holding structure constituted by the arches 16, the hoops 18 and the brackets for fixing the anti-vibration bars is integral with the set of anti-vibration bars which constitute a structure of great stability resting on the part top of the steam generator bun.

Sur la figure 8, on voit un étrier de main­tien 25 constitué sous la forme d'un peigne dont les espaces successifs 26 intercalés entre deux dents suc­cessives 27 présentent une largeur légèrement supé­rieure au diamètre des tubes 5 du générateur de va­peur.In FIG. 8, we can see a retaining stirrup 25 constituted in the form of a comb, the successive spaces 26 of which are inserted between two successive teeth 27 have a width slightly greater than the diameter of the tubes 5 of the steam generator.

Le peigne 25 comporte des parties d'extrémi­té 28 percées de trous de fixation 29 et chacune des dents 27 comporte de même un trou oblong 30 permettant la fixation du peigne en-dessous de la dernière rangée de tubes du générateur de vapeur, comme il sera expli­qué ci-dessous,The comb 25 has end portions 28 pierced with fixing holes 29 and each of the teeth 27 likewise has an oblong hole 30 allowing the fixing of the comb below the last row of tubes of the steam generator, as will be explained below,

En se reportant à la figure 5, on voit que la rangée supérieure 31 des cintres des tubes 5 du faisceau comporte un nombre de cintres identique au nombre d'espaces 26 situés entre les dents du peinge 25.Referring to FIG. 5, it can be seen that the upper row 31 of the hangers of the tubes 5 of the bundle comprises a number of hangers identical to the number of spaces 26 located between the teeth of the peinge 25.

Le peigne 25 peut être utilisé pour le main­tien anti-envol des barres anti-vibratoires en étant glissé en position horizontale en-dessous de la rangée 31 de manière que les espaces 26 correspondent aux po­sitions des cintres supérieurs des tubes 5.The comb 25 can be used to hold the anti-vibration bars anti-take-off by being slid in a horizontal position below the row 31 so that the spaces 26 correspond to the positions of the upper hangers of the tubes 5.

Le peigne 25 est alors retourné à 90° vers le haut de manière que ses parties d'extrémité 28 et ses dents 27 viennent en coïncidence avec une face de l'arceau 16 située immédiatement au-dessus de la ran­gée de cintres 31. L'arceau 16 comporte des trous ve­ nant en coïncidence avec les trous 29 et des pions venant en coïncidence avec les trous 27 pour la mise en place et la fixation par vissage du peigne sur l'arceau 16. Le peigne 25 réalise ainsi un maintien anti-envol des barres antivibratoires.The comb 25 is then turned 90 ° upwards so that its end portions 28 and its teeth 27 come into coincidence with one face of the arch 16 located immediately above the row of hangers 31. The roll bar 16 has ve holes coming in coincidence with the holes 29 and pins coming in coincidence with the holes 27 for the positioning and fixing by screwing of the comb on the hoop 16. The comb 25 thus provides anti-theft retention of the anti-vibration bars.

La mise en place et la fixation du peigne peuvent être réalisées de manière rapide et efficace, sans nécessiter d'opération de soudage.The positioning and fixing of the comb can be carried out quickly and efficiently, without requiring any welding operation.

Il est bien évident que l'invention ne se limite pas au mode de réalisation qui a été décrit.It is obvious that the invention is not limited to the embodiment which has been described.

C'est ainsi qu'on peut imaginer des modes de fixation des barres antivibratoires sur les potences solidaires des arceaux ou sur les cerces d'un type différent de celui qui a été décrit utilisant des cha­pes d'extrémité des barres antivibratoires venant se serrer sur un tourillon solidaire de la potence ou de la cerce.This is how we can imagine methods of fixing the anti-vibration bars on the brackets attached to the arches or on the hoops of a different type from that which has been described using end caps of the anti-vibration bars coming to tighten on a journal attached to the gallows or the hoop.

On peut imaginer l'utilisation d'un nombre quelconque de potences permettant la fixation d'une seule barre antivibratoire ou de plusieurs barres,One can imagine the use of any number of brackets allowing the fixing of a single anti-vibration bar or of several bars,

La structure constituée par les arceaux et les cerces peut être différente de celle qui a été dé­crite et comporter un nombre quelconque d'arceaux ou de cerces. On peut utiliser, en particulier, plus de deux cerces en une ou plusieurs parties.The structure constituted by the hoops and the hoops may be different from that which has been described and may include any number of hoops or hoops. It is possible, in particular, to use more than two hoops in one or more parts.

Les étriers en forme de peigne seront placés de préférence sur les arceaux situés vers le centre du chignon du générateur de vapeur mais il est également possible de disposer de tels étriers anti-envol sur tous les arceaux de la structure de maintien.The comb-shaped stirrups will preferably be placed on the arches located towards the center of the steam generator's bun, but it is also possible to have such anti-take-off stirrups on all the arches of the holding structure.

L'invention s'applique à tous les généra­teurs de vapeur comportant une partie supérieure cons­tituant un chignon de forme sensiblement hémisphérique sur laquelle est placée une structure de maintien com­portant des arceaux et des cerces.The invention applies to all steam generators comprising an upper part constituting a bun of substantially hemispherical shape on which is placed a holding structure comprising hoops and hoops.

Claims (5)

1. - Dispositif de stabilisation des tubes (5) du faisceau d'un générateur de vapeur comportant des barres antivibratoires, entre des parties courbes des tubes du générateur de vapeur cintrés en U, ces tubes présentant deux branches droites serties à leurs extrémités dans une plaque tubulaire (3), les parties courbes des tubes du faisceau ayant des rayons de courbure différents les uns des autres et étant placés de manière adjacente pour constituer une structure de forme sensiblement hémisphérique appelée chignon et séparés par des barres antivibratoires (15) disposées dans des directions sensiblement radiales chacune entre les parties courbes de tubes (5) du faisceau en position adjacente et des arceaux (16) en forme de portion d'anneaux entourant la surface externe du chi­gnon, disposés suivant des plans passant tous par un même diamètre du chignon, reliés par des cerces per­pendiculaires aux arceaux, caractérisé par le fait que chacun des arceaux (16) comporte une pluralité de po­tences de fixation solidaires de l'arceau de direction perpendiculaire par rapport à l'arceau et par rapport aux barres antivibratoires qui sont fixées chacune par une extrémité externe à une potence ou à une cerce par des moyens mécaniques de vissage.1. - Device for stabilizing the tubes (5) of the bundle of a steam generator comprising anti-vibration bars, between curved parts of the steam generator tubes bent in a U shape, these tubes having two straight branches crimped at their ends in a tube plate (3), the curved parts of the bundle tubes having radii of curvature different from each other and being placed adjacent to constitute a structure of substantially hemispherical shape called a bun and separated by anti-vibration bars (15) arranged in substantially radial directions each between the curved parts of tubes (5) of the bundle in the adjacent position and arches (16) in the form of a portion of rings surrounding the external surface of the bun, arranged in planes all passing through the same diameter of the bun, connected by circles perpendicular to the arches, characterized in that each of the arches (16) comp orte a plurality of fixing brackets integral with the steering arch perpendicular to the arch and relative to the anti-vibration bars which are each fixed by an external end to a bracket or a hoop by mechanical screwing means. 2.- Dispositif de stabilisation suivant la revendication 1, caractérisé par le fait que les po­tences (17, 17′) et les cerces (18) comportent, laté­ralement, des tourillons (21, 21a, 21b) perpendicu­laires à la potence (17, 17′) ou à la cerce (18) et que les barres antivibratoires (15) comportent une chape d'extrémité (22) présentant deux mâchoires qui peuvent être engagées sur le tourillon (21, 21a, 21b) et un moyen de serrage (23) à vis des mâchoires sur le tourillon (21, 21a, 21b).2. Stabilization device according to claim 1, characterized in that the brackets (17, 17 ′) and the hoops (18) comprise, laterally, pins (21, 21a, 21b) perpendicular to the bracket (17, 17 ′) or to the hoop (18) and that the anti-vibration bars (15) comprise an end yoke (22) having two jaws which can be engaged on the trunnion (21, 21a, 21b) and a clamping means ( 23) with screws of the jaws on the pin (21, 21a, 21b). 3.- Dispositif de stabilisation suivant l'une quelconque des revendications 1 et 2, caracté­risé par le fait qu'il comporte à la fois des potences pour la fixation d'une seule barre antivibratoire et des potences pour la fixation de deux barres anti­vibratoires.3. Stabilization device according to any one of claims 1 and 2, characterized in that it comprises both brackets for fixing a single anti-vibration bar and brackets for fixing two anti-vibration bars. 4.- Dispositif de stabilisation suivant l'une quelconque des revendications 1, 2 et 3, carac­térisé par le fait qu'il comporte de plus un étrier anti-envol des barres antivibratoires (5) du faisceau situé à la partie supérieure du chignon constitué sous la forme d'un peigne (25) comportant des encoches (26) entre deux dents successives (27) dont la largeur est supérieure au diamètre d'un tube (5) du faisceau et des pièces d'extrémité (28) comportant des trous (29) de fixation du peigne sur un arceau (16).4. Stabilization device according to any one of claims 1, 2 and 3, characterized in that it further comprises an anti-theft stirrup of the anti-vibration bars (5) of the beam located at the upper part of the bun formed in the form of a comb (25) comprising notches (26) between two successive teeth (27) whose width is greater than the diameter of a tube (5) of the bundle and end pieces (28) comprising holes (29) for fixing the comb to a hoop (16). 5.- Dispositif de stabilisation suivant la revendication 4, caractérisé par le fait que chacune des dents (27) du peigne comporte un trou oblong (30) qui peut être engagé sur un pion de positionnement solidaire de l'arceau (16) correspondant.5. Stabilization device according to claim 4, characterized in that each of the teeth (27) of the comb has an oblong hole (30) which can be engaged on a positioning pin integral with the arch (16) corresponding.
EP90400573A 1989-03-09 1990-03-01 Apparatus for the stabilization of the tubes of a steam generator tube bundle comprising antivibration bars Expired - Lifetime EP0387131B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8903099A FR2644281B1 (en) 1989-03-09 1989-03-09 DEVICE FOR STABILIZING THE TUBES OF THE BEAM OF A STEAM GENERATOR COMPRISING ANTI-VIBRATION BARS
FR8903099 1989-03-09

Publications (2)

Publication Number Publication Date
EP0387131A1 true EP0387131A1 (en) 1990-09-12
EP0387131B1 EP0387131B1 (en) 1993-05-12

Family

ID=9379532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90400573A Expired - Lifetime EP0387131B1 (en) 1989-03-09 1990-03-01 Apparatus for the stabilization of the tubes of a steam generator tube bundle comprising antivibration bars

Country Status (9)

Country Link
US (1) US5042433A (en)
EP (1) EP0387131B1 (en)
JP (1) JPH02290404A (en)
KR (1) KR900014811A (en)
CN (1) CN1045481A (en)
CA (1) CA2011770A1 (en)
DE (1) DE69001572D1 (en)
FR (1) FR2644281B1 (en)
ZA (1) ZA901705B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994004869A1 (en) * 1992-08-13 1994-03-03 Siemens Aktiengesellschaft Manipulator for the inspection of difficultly accessible locations in a steam generator

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2684172B1 (en) * 1991-11-27 1993-12-31 Framatome HEAT EXCHANGER, WITH U-TUBES EQUIPPED WITH AN ANTI-THEFT SUPPORT DEVICE.
FR2709174B1 (en) * 1993-08-20 1995-11-17 Framatome Sa Heat exchanger comprising means for holding anti-vibration bars inserted between the tubes of the heat exchanger bundle.
FR2731508B1 (en) * 1995-03-09 1997-05-09 Framatome Sa HEAT EXCHANGER, WITH U-TUBES, EQUIPPED WITH A TUBE SETTING DEVICE, ANTI-VIBRATION AND ANTI-TAKE-OFF
DE59708896D1 (en) * 1997-10-09 2003-01-16 Alstom Switzerland Ltd Low-pressure feedwater
US8695688B2 (en) * 2007-07-18 2014-04-15 Babcock & Wilcox Canada Ltd. Nubbed U-bend tube support
JP5055165B2 (en) * 2008-02-29 2012-10-24 三菱重工業株式会社 Steam generator
US9697919B2 (en) * 2010-12-29 2017-07-04 Westinghouse Electric Company, Llc Anti-vibration tube support plate arrangement for steam generators
JP5901266B2 (en) * 2011-12-12 2016-04-06 三菱重工業株式会社 Steam generator
EP2728253A4 (en) * 2011-06-28 2016-01-27 Mitsubishi Heavy Ind Ltd Steam generator
US20140014294A1 (en) * 2012-07-13 2014-01-16 Areva Np Inc. U-Bend Tube Compression/Distortion Stabilization System (CDSS)
US20140116360A1 (en) * 2012-10-31 2014-05-01 Westinghouse Electric Company Llc Method and apparatus for securing tubes in a steam generator against vibration
CN103868051B (en) * 2012-12-13 2015-08-26 中国核动力研究设计院 PWR nuclear power plant steam generator march-past vibrationproof bar structure
US9905953B1 (en) 2016-09-30 2018-02-27 Slobodan Pavlovic High power spring-actuated electrical connector
CN106765024B (en) * 2016-11-24 2019-09-13 中广核工程有限公司 Steam Generators in NPP vibrationproof structure
MX2020008873A (en) 2018-02-26 2021-01-08 Royal Prec Products Llc Spring-actuated electrical connector for high-power applications.
WO2019237009A1 (en) 2018-06-07 2019-12-12 Royal Precision Products, Llc Electrical connector system with internal spring component
WO2020154330A1 (en) 2019-01-21 2020-07-30 Royal Precision Products, Llc Power distribution assembly with boltless busbar system
DE112020003846T5 (en) 2019-09-09 2022-05-12 Royal Precision Products Llc CONNECTOR RECORDING SYSTEM WITH READABLE AND RECORDABLE MARKERS
US11721942B2 (en) 2019-09-09 2023-08-08 Eaton Intelligent Power Limited Connector system for a component in a power management system in a motor vehicle
KR20230043171A (en) 2020-07-29 2023-03-30 이턴 인텔리전트 파워 리미티드 Connector system with interlock system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175078A (en) * 1985-05-17 1986-11-19 Nat Nuclear Corp Ltd Heat exchanger with antivibration structure
EP0214812A2 (en) * 1985-09-06 1987-03-18 Westinghouse Electric Corporation Antivibration bar installation apparatus

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH612496A5 (en) * 1976-09-01 1979-07-31 Sulzer General Sgx Atomic Waer
US4590991A (en) * 1984-01-09 1986-05-27 Westinghouse Electric Corp. Flexible stabilizer for degraded heat exchanger tubing
JPS60245999A (en) * 1984-05-21 1985-12-05 Hokkaido Electric Power Co Inc:The Heat exchanger
DE3509177C1 (en) * 1985-03-14 1986-10-02 Brown Boveri Reaktor GmbH, 6800 Mannheim Device for introducing a cylindrical body, in particular a sleeve, into a tube of a steam generator
US4747373A (en) * 1986-04-24 1988-05-31 Westinghouse Electric Corp. Method and apparatus for minimizing antivibration bar gaps of a steam generator
US4753197A (en) * 1987-12-10 1988-06-28 The Babcock & Wilcox Company Tube support
US4895204A (en) * 1987-12-24 1990-01-23 Foster Wheeler Energy Corporation Tube support vibration suppression device and method
US4893671A (en) * 1988-06-20 1990-01-16 Westinghouse Electric Corp. Steam generator tube antivibration apparatus and method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175078A (en) * 1985-05-17 1986-11-19 Nat Nuclear Corp Ltd Heat exchanger with antivibration structure
EP0214812A2 (en) * 1985-09-06 1987-03-18 Westinghouse Electric Corporation Antivibration bar installation apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 115 (M-474)(2172) 30 avril 86, & JP-A-60 245999 (HOTSUKAIDOU DENRIYOKU) 5 décembre 85, *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994004869A1 (en) * 1992-08-13 1994-03-03 Siemens Aktiengesellschaft Manipulator for the inspection of difficultly accessible locations in a steam generator

Also Published As

Publication number Publication date
JPH02290404A (en) 1990-11-30
CA2011770A1 (en) 1990-09-09
ZA901705B (en) 1991-10-30
FR2644281A1 (en) 1990-09-14
EP0387131B1 (en) 1993-05-12
DE69001572D1 (en) 1993-06-17
US5042433A (en) 1991-08-27
KR900014811A (en) 1990-10-25
CN1045481A (en) 1990-09-19
FR2644281B1 (en) 1991-06-07

Similar Documents

Publication Publication Date Title
EP0387131B1 (en) Apparatus for the stabilization of the tubes of a steam generator tube bundle comprising antivibration bars
EP0639741B1 (en) Heat exchanger with holding means of anti-vibration bars inserted between the bundle tubes
EP0731328B1 (en) Heat exchanger with U-tubes, provided with a damping and anti- blowout device for securing tubes
EP0633427A1 (en) Heat exchanger with U-tubes bundle and antivibration bars between the curved part of the tubes
EP0360629B1 (en) Instrumentation device for the core of a nuclear water-pressurized reactor, and method and device for removing and installing this instrumentation device
FR2768473A1 (en) ASSEMBLY DEVICE BETWEEN TWO TUBES
FR2558933A1 (en) STEAM GENERATOR FOR PRESSURE WATER REACTOR COMPRISING ANTI-VIBRATION BARS FOR STABILIZING HEAT TRANSFER TUBES
FR2664965A1 (en) DEVICE FOR ANTIVIBRATORY SETTING OF TUBES OF A HEAT EXCHANGER.
EP0654636A1 (en) Device for antivibrationally securing tubes of a heat exchanger and use thereof
EP0544579B1 (en) U-tube heat exchanger with anti-blow-out supporting device
FR2883096A1 (en) Nuclear reactor thermocouple column replacement procedure uses underwater intervention stand and alignment pins for intermediate supporting structure
EP0173586B1 (en) Cylindrical shell and tube heat exchanger, wherein the shell is radially held inside an external shell
EP0648974B1 (en) Steam generator with radial support for tube inner shell and tube support plate
FR2707373A1 (en) Device for radially holding the bank jacket and the distance plates of a steam generator
FR2545257A1 (en) CALENDER
EP3479383B1 (en) Nuclear reactor, methods for assembling and replacing thermocouple ducts, assembly for implementing these methods
FR2598247A1 (en) CORE PLUG OF A FAST NEUTRAL NUCLEAR REACTOR
FR2635343A1 (en) SUPPORT STRUCTURE FOR QUICK LOADING OF WIRE COILS
FR2714626A1 (en) Removable supports for tubes of a heat exchanger during assembly and transport
FR2648945A1 (en) Device for linkage of the outer end of an antivibration bar of a steam generator
FR2707372A1 (en) Device for radially holding the bank jacket and the distance plates of a steam generator by stops with an eccentric
FR2731329A1 (en) Heat exchanger with bundle of U-shaped tubes
FR2546553A1 (en) DEVICE FOR SUSPENDING A STRUCTURE
EP0223677A1 (en) Supporting system for thin-walled apparatuses
FR2713971A1 (en) Support for PWR steam generator tubes during mfr. and transport

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE ES GB LI SE

17P Request for examination filed

Effective date: 19900820

17Q First examination report despatched

Effective date: 19910904

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE ES GB LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19930512

Ref country code: GB

Effective date: 19930512

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19930512

Ref country code: DE

Effective date: 19930512

REF Corresponds to:

Ref document number: 69001572

Country of ref document: DE

Date of ref document: 19930617

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19930512

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19960311

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19960320

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19970331

Ref country code: CH

Effective date: 19970331

Ref country code: BE

Effective date: 19970331

BERE Be: lapsed

Owner name: FRAMATOME

Effective date: 19970331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT