EP0077255A1 - Verfahren und Einrichtung zum Entfernen von Schlamm an der Rohrplatte von Dampferzeugern - Google Patents

Verfahren und Einrichtung zum Entfernen von Schlamm an der Rohrplatte von Dampferzeugern Download PDF

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Publication number
EP0077255A1
EP0077255A1 EP82401808A EP82401808A EP0077255A1 EP 0077255 A1 EP0077255 A1 EP 0077255A1 EP 82401808 A EP82401808 A EP 82401808A EP 82401808 A EP82401808 A EP 82401808A EP 0077255 A1 EP0077255 A1 EP 0077255A1
Authority
EP
European Patent Office
Prior art keywords
lance
tubes
plate
enclosure
sludge
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
EP82401808A
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English (en)
French (fr)
Other versions
EP0077255B1 (de
Inventor
André Charamathieu
Jean Dessales
Bernard Lebouc
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
Orano DS Demantelement et Services SA
Original Assignee
Framatome SA
TRAVAUX EN MILIEU IONISANT STMI Ste
STMI Societe des Techniques en Milieu Ionisant SPL
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, TRAVAUX EN MILIEU IONISANT STMI Ste, STMI Societe des Techniques en Milieu Ionisant SPL filed Critical Framatome SA
Publication of EP0077255A1 publication Critical patent/EP0077255A1/de
Application granted granted Critical
Publication of EP0077255B1 publication Critical patent/EP0077255B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G15/00—Details
    • F28G15/04—Feeding and driving arrangements, e.g. power operation
    • 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
    • F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/54—De-sludging or blow-down devices
    • 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
    • F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/483—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers specially adapted for nuclear steam generators

Definitions

  • the subject of the invention is a method and a device for eliminating sludge on the tube plate of steam generators of the type comprising, in a cylindrical enclosure with vertical axis closed by the plate, a bundle of smooth parallel tubes connected to said plate. , distributed in layers and traversed by a primary fluid at high temperature.
  • the invention finds a particularly important application in the field of recirculating steam generators, in which the water separated from the steam at the outlet of the secondary circuits is brought back to the inlet. which causes the accumulation on the plate of sludges containing especially magnetite, which form in the long run an adherent and compact layer.
  • This sludge causes corrosion of the exchange tubes at the level of the tube plate and it is necessary to eliminate them to avoid degradation of the steam generator.
  • the attempts made to evacuate the sludge before it forms a compact layer for example using purge ramps (FR-A-2 285 573) have proved insufficient to prevent accumulation.
  • the lance can successively be introduced in one direction, to clean a first half of the tube plate, then in the other from a hole opposite the first to clean the second half.
  • a water circulation is organized at the periphery of the plate between two holes of the enclosure placed face to face. The flow introduced on one side is divided into two fractions which circulate on the periphery on either side of the water street and meet to exit the enclosure.
  • the jet which is directed upwards not only has no effect of pulling out sludge, but also causes runoff which can bring back towards the middle of the plate the sludge not immediately sucked in. the suburbs.
  • Lance and sweeping streams of water can be antagonists in certain areas and cause a local redeposition of the sludge removed.
  • this sludge takes, as soon as it is deposited, a consistency such that it becomes almost impossible to vacuum it without resuspending it.
  • the water pressure must be moderate (practically of the order of 150 bars) to avoid damaging the tubes by too violent jets. This pressure is often insufficient for uprooting, that is to say for attacking a consolidated and very adherent sludge deposit.
  • the invention aims to provide a method of eliminating sludge which meets the requirements of practice better than those previously known, in particular in that it ensures more complete cleaning thanks to an effective attack and an circulation organized so as to avoid sludge returns to already treated areas, using only simple means.
  • the invention proposes in particular a method according to which: at least one lance is moved radially (and advantageously two lances symmetrically) from the center of the tube plate between two layers of tubes, parallel to the tube plate and close to it from this one directs towards the plate, from the terminal part of the lance and in fixed and symmetrical directions with respect to the direction of the sheets, two jets of cleaning liquid under high pressure which are interrupted in passing in front of the tubes; and the cleaning liquid, which will generally be water, is simultaneously discharged from the periphery of the bundle.
  • the jets are interrupted when passing in front of the tubes, very high driving pressures can be used, allowing rapid stripping, without risking damaging the tubes:
  • the latter can be very close to the lance, since there is no There is more to foresee the space necessary for the oscillation of this one and that they are not subjected any more to the action of the jets. They can even constitute guides for holding the lance.
  • the current spacing between layers of tubes will be sufficient for the passage of the lance. will no longer be necessary to enter via the water street.
  • the lances providing jets of fixed orientation used in the process according to the invention can be introduced by the holes of small diameter, called "eye holes", which are generally provided in the enclosure of the steam generator orthogonally to the fist holes or below, between the distribution plate and the tube plate.
  • the cleaning will generally be carried out in several successive passes, using different lances directing jets which strike the plate in de's zones increasingly distant from the lance or lances.
  • the sludge is gradually pushed back towards the periphery of the bundle where it is taken up and discharged.
  • a first solution consists in using four sections of piping distributed in two pairs. Each pair is introduced through a hole located 90 ° from the direction of movement of the lance or lances and each section is arranged at the periphery of the beam on a 90 ° arc. The four sections thus cover the entire peripheral space of the tube bundle. They are each connected to a suction member, which can in particular be a hydro-ejector.
  • a second solution is to create a one-way water circulation throughout the peripheral space, by injection and aspiration using tubes passing through the enclosure at two opposite points.
  • a last solution which can moreover be used in combination with the first, consists in collecting the sludge using a vacuum device placed against the plate at the periphery thereof.
  • the invention also aims to provide a device for eliminating sludge which is both simple and effective, making it possible to implement the process defined above.
  • the invention proposes a device which comprises at least one lance of thickness sufficiently small to pass between two layers of tubes, having an end portion provided with orientation nozzles such that they direct oblique jets which are substantially symmetrical by relative to the direction of the sheets towards the plate during operation, means for supplying water under high pressure to the lance and interrupting the supply when the nozzles pass in front of the tubes, and a mechanism for radially moving said lance in a fixed orientation from the center of the enclosure to the outside, as well as means for collecting and discharging the liquid loaded with sludge at the periphery of the tube bundle.
  • the terminal part of the lance will advantageously consist of a head having a straight section of flat shape with two superposed nozzles, of a thickness such that it is inserted between two layers of tubes and the height of which is chosen to have a rigidity avoiding any significant bending in the vertical direction while allowing passage through a hole made through the enclosure.
  • the head can be pierced with a high hole directing a balancing jet upwards.
  • the steam generators of nuclear boilers are frequently placed inside a casemate intended for protection against projectiles in the event of an incident inside the general enclosure of the boiler and / or for biological protection.
  • the free space between the enclosure of the steam generator and the casemate is generally less than the length of lance to intro radially in the steam generator.
  • the lance will be formed so as to be deformable in plan while being rigid in the vertical direction in order to tolerate the necessary overhang.
  • the lance may include notches regularly distributed forming a set of teeth for receiving the teeth of a drive mechanism located outside the enclosure and which can be associated with displacement measurement means and with a tube proximity detector carried by the head allowing the precise positioning of the lance before putting into action.
  • the steam generator comprises a pressure enclosure of cylindrical shape 1 closed at its lower part by a tubular plate 2 in which the end portions of U-shaped heat exchange tubes 7 are expanded and welded.
  • the enclosure extends under the plate by a dome delimiting a water box 3 separated by a vertical partition 4 in a compartment where the hot primary water coming from the reactor arrives by a tube and an outlet compartment from where the primary water escapes towards the reactor by a tubing 6. Between the two compartments, the primary water circulates in the hot branch, then the cold branch of the U-shaped tubes 7.
  • a secondary envelope 8 Between the bundle of U-shaped tubes 7 and the enclosure 1 is placed a secondary envelope 8.
  • the secondary envelope 8 ends above the tubular plate, leaving a space allowing the secondary water and the water. recirculation which descend through the annular space between the enclosure 1 and the casing 8 to feed the area occupied by the beam, immediately above the tube plate.
  • Spacer plates (not shown) pierced with holes for the passage of the tubes and the opening for the circulation of water and steam are arranged at regular intervals along the bundle and hold the tubes.
  • a distribution plate 11 having a central opening 12 is disposed above the tubular plate.
  • the hot and cold branches of the tubes are separated by a free diametrical zone 13, called "water street", the width of which is determined by the maximum bending that can be given to the tubes 7. In this water street are placed spacers 14 and a continuous bleed ramp 15.
  • the cleaning device uses accesses provided in the envelope and which, in the steam generator illustrated, include two relatively large diameter holes 17, called “fist holes”, diametrically opposite, located opposite the water street and at the distribution plate 11.
  • Two smaller holes 16, usually called “eye holes” and whose diameter is typically 50 mm, are aligned in a direction perpendicular to that of the fist holes, at a short distance from the tube plate 2 (typically 250 mm).
  • the holes 17 and 16 closed in normal operation by tapes, correspond to openings made in the casing 8.
  • the enclosure 1 is surrounded by a casemate (not shown) whose role is including stopping the projected parts and debris in the event of an incident.
  • the sludge removal device shown as an exemplary embodiment in Figure 1 can be viewed as comprising a sludge attack and suspension system and a collection system.
  • the attack system comprises, for the same operation, two lances 19 intended to be introduced each by an eye hole 16 and to be moved between two plies of tubes, that is to say in an interval whose width is typically of the order of 10 mm.
  • the lance 19 shown by way of example in FIGS. 2 to 5 comprises a guide and supply part 23 and a head 24 fixed to the part 23 by means eliminating the risk of loss of the head inside the generator .
  • the guide part designed so as to be flexible, comprises two superimposed tubes 27 and 28 (FIG. 3) connected by a central core pierced with holes and by two metal side walls 25 and 26.
  • Each side wall 25 or 26 is constituted by a thin sheet of metal pierced with rectangular openings formed by cutting and folding inwards fins 32 and 33.
  • the core and the fins are coated with a coating of thermo material plastic 31 which also drowns the tubes.
  • the fins are of such length that they trap the central core 34.
  • the guide part 23 thus has regularly distributed openings constituting meshes of the movement mechanism which will be described later.
  • the head 24 is constituted by a metallic piece forming a water box, into which the tubes 27 and 28 open. In the rear part of this head are recesses for receiving tabs 42 and 43 secured to the side walls 25 and 26. Des pins allow to permanently secure the legs of the head.
  • the water box is provided with two cleaning nozzles constituted by orifices 38 drilled obliquely in thickened portions of the head and designed so as to provide jets inclined downwards in a substantially symmetrical manner.
  • a lance can be formed in this way having a thickness not exceeding 10 mm, that is to say the width of the ligament of the tubular plate between two layers of tubes 7, and a height of the order of 45 mm, smaller than the diameter of an eye hole. Due to its constitution, this lance, when it is supported by a fitting link outside the enclosure, has only an acceptable arrow when it is in its minimum projecting position inside . To reduce the bending forces exerted on it, one can provide, in the head, an orifice 40 directed upwards to give rise to a balancing jet.
  • the lance can be used with a mechanism of the kind shown in FIGS. 4 and 5, which gives it, at the exit of the enclosure, a curvature limiting the radial size to a value compatible with the space which remains between the casemate and the enclosure.
  • the lance can therefore remain very simple and be used without telescopic displacement or splicing of sections, which would moreover be difficult to implement given the small interval between two adjacent plies of tubes and the need to carry out these operations under control. of an operator in an area subject to significant radiation.
  • the lance head shown in section in FIG. 2A differs from that shown in FIG. 2 in that it does not comprise a single set of cleaning nozzles each placed on one side and having the same orientation, but several sets of nozzles.
  • the upper tube 27 feeds a first set of nozzles 38 whose orientation corresponds to that of the nozzles shown in FIG. 2.
  • the lower tube 28 feeds two sets of nozzles, having an inclination of 40 ° and 70 ° respectively on the horizontal, therefore corresponding to shots at a shorter distance.
  • the head shown in FIG. 2A can in particular be used to carry out sweeping of the loose sludge, under a lower pressure than during a preliminary stripping operation, carried out in several passes with heads with a single set of nozzles. But, as will be seen below, it is also possible to use a head of the kind shown in FIG. 2A to remove and expel the sludge by single passage of the lance, with an advance with mit steps, as will be seen below.
  • the variant embodiment of the lance shown in FIGS. 2B and 2C differs in particular from FIG. 2 in. that it comprises three flexibles.d l food which are extended by corresponding tubes up to a chamber 80 provided with a balancing orifice 40 directed upwards. Partitions 81 provided in the chamber separate the flows coming from the tubes 27 and 28 until near the end of the head.
  • the one shown in FIG. 2B intended for shooting at a short distance from the lance introduction plane, comprises two sets of nozzles 82, of the same orientation, the longitudinal spacing of which corresponds to the distance between two successive tubes of a same tablecloth.
  • On the head and the body of the lance may be provided engraved marks 83 for locating, the spacing of two successive marks corresponding to the interval between two tubes.
  • that of Figure 2B provides a flow more important for sludge removal.
  • a last head, used for a third pass may include nozzles having the orientation indicated in phantom in Figure 2D.
  • the mechanism shown in Figures 4 and 5, intended to push and pull the lance 19, is carried by a base 60.
  • This base carries a guide assembly comprising two curved and parallel slides 61, entre.les which the guide portion 23 circulates in meshing on endless belts 62 notched on one side, the path of which is fixed by rollers 63.
  • the drive mechanism.com carries two further drive assemblies placed on either side of the slides on the path of the lance 19. Each of these assemblies consists of a set of two belts 64 notched on both sides, meshing on one side with the guide portion 23, on the other side, with drive pinions 65 coupled to a gearmotor 66 by means of a torque limiter 67 and a displacement measurement member 68 of any type.
  • the lance is rigid. It consists of several superimposed tubes, two in number in the illustrated case, connected from place to place by spacers 70.
  • the lance passes, at the outlet of the enclosure, a bender which, in the case illustrated in FIG. 7 consists of a series of bending rollers 71 carried by the base 60.
  • the drive means consist of a chain 72 fixed to the rear spacer 70 and driven on an endless path by a pinion 73.
  • position sensor 68 may be insufficiently precise, it will frequently be supplemented by optical means, using for example reference points 74 distributed along the lance (FIG. 6) or by electrical means. These can be formed by an eddy current sensor 75 located at the base of the head ( Figure 4), detecting the proximity of a tube.
  • the tubes are supplied with water by a flexible pipe 20 (FIG. 1) for connection with a remote pump unit (not shown).
  • This group can have a conventional constitution, except that it is provided with means for stopping the arrival of water in response in particular to a signal. received from a device for detecting passage in front of the tubes, comprising the position sensor 68 and, optionally, an additional optical or .electric sensor.
  • This group can moreover be provided to supply on demand one or the other of two pressures, one of which is very high (at least 200 bars and for example 300 bars) for the withdrawal and the other of which is lower for cleaning and suspending sludge.
  • the sludge collection and evacuation system comprises, in the embodiment shown in FIGS. 1 and 9, two low-pressure spraying ramps 21 introduced by the fist holes 17 above the plate. distribution 11. These ramps supply water to the central part of the bundle of tubes and cause a flow directed towards the periphery.
  • the sludge is taken up by four sections of flexible tubing 22 pierced with suction holes 51 which each cover a quarter of the periphery. The four sections are each connected to a hydro-ejector 52, only one of which is shown in FIG. 9.
  • This hydro-ejector which can use as a working fluid the water also used for cleaning, makes it possible to achieve a depression reaching 8 meters of water, exerting a suction effect sufficient to entrain suspended sludge.
  • a stream of low pressure sweeping water can also be introduced into the water street using nozzles 53 placed in the fist hole 17.
  • This arrangement makes it possible to organize the circulation of water in a coherent manner and to avoid dead zones and the return of sludge to the regions already cleaned.
  • a set of lances is used, the nozzles of which are such that the water jets clean the zones A and repel the sludge towards the zone B.
  • a lance is used which cleans up area B and delivers the sludge to area C and so on with a slight overlap of the areas.
  • a pass is made with a last lance having nozzles providing a jet which covers almost the entire tubular bundle (zone D in FIG. 10) and ensures by training the cleaning of the sludge which could have been redeposited during the first three passes.
  • the spears are first completely introduced. They are supplied with water under a pressure which can vary depending on whether one wishes to perform a stripping (which, in certain cases, may require a pressure of the order of 400 bars) or a simple cleaning. The lances are then moved so as to bring the nozzles 38 in front of the next ligament. During this translation, while the nozzles 38 pass in front of tubes, the jets are interrupted, which implies a stop of about 10 seconds in practice, the emission of jet in each intertubular space for about 30 seconds in general.
  • an injection and suction system which creates a circulation of water in the same direction throughout the peripheral space.
  • the sections are oriented so as to generate a circular flow in one direction and the pressures and flow rates used are chosen so that the current has a speed greater than 1.6 m per second. This avoids redeposition of suspended sludge.
  • the collection system is completed by ramps 21 for supplying water at low pressure, as in the previous case.
  • a return pipe laid flat on the periphery of the plate comprising a central suction chamber 54. of liquid loaded with sludge, connected to means of suction (pump or hydro-ejector) and two chambers 55 and 56 for supplying compressed air, opening on either side of the inlet slot of the central chamber 54 ( Figure 12).
  • the chambers 55 and 56 communicate through calibrated orifices with the flat underside of the piping, intended to be applied to the tube plate.
  • the compressed air leaving the chambers 55 and 56 resuspends the sludge which is entrained with the cleaning water by the central chamber 54.
  • the compressed air jets constitute a cushion of air for supporting the piping and thereby facilitate the recovery of sludge.
  • the operating sequence described above assumes that several successive passes are made using lances whose nozzles have an increasingly inclined orientation towards the vertical. It is also possible to carry out cleaning in a single pass, by using a lance comprising a head of the type shown in FIG. 2A. For this, we advance the lance following a progression in crawl steps such that each ligament receives the jets coming from the head following four successive feeding sequences of the heads.
  • the progression can be represented by the following table where m represents the serial number of the ligament located closest to the water street, the columns correspond to the feeding sequences of the lance n ° 1 , 2, ... and the crosses indicate the ligaments that receive the jets.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cleaning In General (AREA)
EP82401808A 1981-10-06 1982-10-04 Verfahren und Einrichtung zum Entfernen von Schlamm an der Rohrplatte von Dampferzeugern Expired EP0077255B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8118760 1981-10-06
FR8118760A FR2514108B1 (fr) 1981-10-06 1981-10-06 Procede et dispositif d'elimination des boues sur la plaque tubulaire des generateurs de vapeur

Publications (2)

Publication Number Publication Date
EP0077255A1 true EP0077255A1 (de) 1983-04-20
EP0077255B1 EP0077255B1 (de) 1986-01-02

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EP82401808A Expired EP0077255B1 (de) 1981-10-06 1982-10-04 Verfahren und Einrichtung zum Entfernen von Schlamm an der Rohrplatte von Dampferzeugern

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Country Link
US (1) US4424769A (de)
EP (1) EP0077255B1 (de)
JP (1) JPS58127003A (de)
KR (1) KR880001503B1 (de)
CA (1) CA1190104A (de)
DE (1) DE3268322D1 (de)
ES (1) ES8306244A1 (de)
FR (1) FR2514108B1 (de)
ZA (1) ZA826909B (de)

Cited By (17)

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Publication number Priority date Publication date Assignee Title
FR2545582A1 (fr) * 1983-05-04 1984-11-09 Electricite De France Dispositif d'observation de la plaque tubulaire d'un generateur de vapeur
FR2550967A1 (fr) * 1983-08-26 1985-03-01 Innus Ind Nuclear Service Procede de nettoyage d'un generateur de vapeur
EP0151404A2 (de) * 1984-02-03 1985-08-14 Westinghouse Electric Corporation Wirbelstrompositionierungseinrichtung für Schlammlanze
EP0168728A1 (de) * 1984-07-20 1986-01-22 Westinghouse Electric Corporation Positionierungseinrichtung mit mehreren Sensoren für die Düse einer Flüssigkeitslanze
FR2577035A1 (fr) * 1985-02-05 1986-08-08 Thome Emmanuel Outil destine a la destruction des boues formees dans les generateurs de vapeur des reacteurs nucleaires a eau pressurisee
FR2584317A1 (fr) * 1985-04-23 1987-01-09 Assainissement Ste Regionale Dispositif nettoyeur, utilisable notamment entre les tubes d'un faisceau de tubes
EP0255503A2 (de) * 1986-07-29 1988-02-03 Smet Jet N.V. Wasserstrahlreinigung von Dampferzeugern
WO1988007156A2 (en) * 1987-03-18 1988-09-22 Electric Power Research Institute, Inc. Flexible lance for steam generator secondary side sludge removal
US4844021A (en) * 1987-09-18 1989-07-04 Siemens Aktiengesellschaft Cleaning device for heat exchangers having tube bundles, in particular for the tube sheet and spacer plate region
EP0432889A2 (de) * 1989-12-12 1991-06-19 The Babcock & Wilcox Company Schlammlanze
FR2660479A1 (fr) * 1990-04-03 1991-10-04 Assainissement Ste Regionale Dispositif de lancage, notamment pour nettoyer l'interieur d'un generateur de vapeur ou analogue.
EP0459597A1 (de) * 1987-03-18 1991-12-04 Electric Power Research Institute, Inc Flexible Lanze zum Entfernen von Schlamm in der Sekundärseite eines Dampferzeugers
FR2692712A1 (fr) * 1992-06-17 1993-12-24 Framatome Sa Dispositif d'intervention à l'intérieur d'un tube de générateur de vapeur d'un réacteur nucléaire à eau sous pression.
EP0647815A1 (de) * 1993-10-08 1995-04-12 Framatome Dampferzeuger mit übereinandergesetzten Blockierungselementen in einer Rohrgasse
WO1996028690A1 (de) * 1995-03-15 1996-09-19 Siemens Aktiengesellschaft Flexible lanze zum bearbeiten oder inspizieren eines rohrbodens eines dampferzeugers
EP0780627A1 (de) * 1995-12-22 1997-06-25 Framatome Verfahren und Vorrichtung zur Reinigung der Endplatte eines Wärmetauschers vom Innern des Wärmetauscherbündels
US7050543B2 (en) 2002-11-06 2006-05-23 Feinfocus Röntgen-Systeme GmbH Microfocus X-ray tube

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DE3301536A1 (de) * 1983-01-19 1984-07-19 Kraftwerk Union AG, 4330 Mülheim Rohrgassen-manipulator
DE3202248A1 (de) * 1982-01-25 1983-08-04 Kraftwerk Union AG, 4330 Mülheim Rohrgassen-manipulator, spritzkopf und zugehoeriges spritzverfahren zum hochdruck-abschlaemmen von waermetauschern
US4769085A (en) * 1983-08-26 1988-09-06 Innus Industrial Nuclear Services S.A. Method for cleaning a steam generator
FR2558747B1 (fr) * 1984-01-27 1986-07-25 Innus Ind Nuclear Service Procede de nettoyage sous haute pression d'un evaporateur et installation utilisee dans ce but
US4526135A (en) * 1984-02-03 1985-07-02 Westinghouse Electric Corp. Eddy current workpiece positioning apparatus
US4676201A (en) * 1984-07-25 1987-06-30 Westinghouse Electric Corp. Method and apparatus for removal of residual sludge from a nuclear steam generator
US4774975A (en) * 1984-09-17 1988-10-04 Westinghouse Electric Corp. Method and apparatus for providing oscillating contaminant-removal stream
FR2573179B1 (fr) * 1984-11-13 1987-02-13 Framatome Sa Dispositif d'enlevement des boues pour installation de nettoyage de la plaque tubulaire d'un generateur de vapeur et installation comportant un tel dispositif
US4705575A (en) * 1985-03-12 1987-11-10 Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftung Process and arrangement for separating ceramic nuclear fuels from metallic casing or support members
JPH0737199B2 (ja) * 1985-04-02 1995-04-26 株式会社ジェイエスイー 表面の付着物除去方法
US4848278A (en) * 1985-11-26 1989-07-18 Apex Technologies, Inc. Nuclear steam generator sludge lancing method and apparatus
US4700662A (en) * 1986-06-13 1987-10-20 The Babcock & Wilcox Company Sludge lance wand
US4757785A (en) * 1987-02-19 1988-07-19 The Babcock & Wilcox Company Steam generator sludge removal apparatus
US5341406A (en) * 1987-03-18 1994-08-23 Electric Power Research Institute, Inc. Sliding lance guide flexible lance system
US5036871A (en) * 1989-02-22 1991-08-06 Electric Power Research Institute, Inc. Flexible lance and drive system
US5065703A (en) * 1987-03-18 1991-11-19 Electric Power Research Institute, Inc. Flexible lance for steam generator secondary side sludge removal
FR2647539B1 (fr) * 1989-05-23 1991-09-13 Framatome Sa Dispositif d'introduction et de mise en place d'un outillage a l'interieur d'un tube d'un echangeur de chaleur et utilisation de ce dispositif
US4971140A (en) * 1989-12-22 1990-11-20 Siemens Aktiengesellschaft Process and equipment for the maintenance of the secondary section of a heat exchanger
US5069172A (en) * 1990-09-26 1991-12-03 Westinghouse Electric Corp. Nuclear steam generator sludge lance method and apparatus
JP3073261B2 (ja) * 1991-06-03 2000-08-07 株式会社ジェイエスイー 石材表面の加工処理方法とその装置
US5257296A (en) * 1991-10-25 1993-10-26 Buford Iii Albert C Steam generator chemical solvent mixing system and method
US5194217A (en) * 1992-01-10 1993-03-16 The Babcock & Wilcox Company Articulated sludge lance with a movable extension nozzle
US5201281A (en) * 1992-03-10 1993-04-13 Alexander Cella Steam generator maintenance apparatus
DE4226855A1 (de) * 1992-08-13 1994-02-17 Siemens Ag Manipulator zur Inspektion schwer zugänglicher Stellen eines Dampferzeugers
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DE10006066A1 (de) * 2000-02-10 2001-08-30 Siemens Ag Flexible Lanze zum Bearbeiten oder Inspizieren eines Rohrbodens eines Dampferzeugers
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KR101181002B1 (ko) * 2010-09-06 2012-09-07 한국수력원자력 주식회사 열교환기 관판 상단의 스케일 및 슬러지 제거를 위한 분절형 초음파 세정장치
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FR2545582A1 (fr) * 1983-05-04 1984-11-09 Electricite De France Dispositif d'observation de la plaque tubulaire d'un generateur de vapeur
EP0125186A1 (de) * 1983-05-04 1984-11-14 Electricite De France Einrichtung zum Beobachten der Rohrplatte eines Dampferzeugers
FR2550967A1 (fr) * 1983-08-26 1985-03-01 Innus Ind Nuclear Service Procede de nettoyage d'un generateur de vapeur
EP0151404A2 (de) * 1984-02-03 1985-08-14 Westinghouse Electric Corporation Wirbelstrompositionierungseinrichtung für Schlammlanze
EP0151404A3 (de) * 1984-02-03 1985-10-16 Westinghouse Electric Corporation Wirbelstrompositionierungseinrichtung für Schlammlanze
EP0168728A1 (de) * 1984-07-20 1986-01-22 Westinghouse Electric Corporation Positionierungseinrichtung mit mehreren Sensoren für die Düse einer Flüssigkeitslanze
FR2577035A1 (fr) * 1985-02-05 1986-08-08 Thome Emmanuel Outil destine a la destruction des boues formees dans les generateurs de vapeur des reacteurs nucleaires a eau pressurisee
FR2584317A1 (fr) * 1985-04-23 1987-01-09 Assainissement Ste Regionale Dispositif nettoyeur, utilisable notamment entre les tubes d'un faisceau de tubes
WO1990007679A1 (en) * 1986-07-29 1990-07-12 Carlo Smet Arrangement for cleaning a steam generator with a water jet
EP0255503A3 (de) * 1986-07-29 1988-03-30 Smet Jet N.V. Wasserstrahlreinigung von Dampferzeugern
US4887555A (en) * 1986-07-29 1989-12-19 Carlo Smet Arrangement for cleaning a steam generator with a water jet
EP0255503A2 (de) * 1986-07-29 1988-02-03 Smet Jet N.V. Wasserstrahlreinigung von Dampferzeugern
WO1988007156A2 (en) * 1987-03-18 1988-09-22 Electric Power Research Institute, Inc. Flexible lance for steam generator secondary side sludge removal
WO1988007156A3 (en) * 1987-03-18 1988-10-06 Electric Power Res Inst Flexible lance for steam generator secondary side sludge removal
EP0459597A1 (de) * 1987-03-18 1991-12-04 Electric Power Research Institute, Inc Flexible Lanze zum Entfernen von Schlamm in der Sekundärseite eines Dampferzeugers
US4844021A (en) * 1987-09-18 1989-07-04 Siemens Aktiengesellschaft Cleaning device for heat exchangers having tube bundles, in particular for the tube sheet and spacer plate region
EP0432889A2 (de) * 1989-12-12 1991-06-19 The Babcock & Wilcox Company Schlammlanze
EP0432889A3 (en) * 1989-12-12 1991-07-31 The Babcock & Wilcox Company Sludge lance
FR2660479A1 (fr) * 1990-04-03 1991-10-04 Assainissement Ste Regionale Dispositif de lancage, notamment pour nettoyer l'interieur d'un generateur de vapeur ou analogue.
FR2692712A1 (fr) * 1992-06-17 1993-12-24 Framatome Sa Dispositif d'intervention à l'intérieur d'un tube de générateur de vapeur d'un réacteur nucléaire à eau sous pression.
EP0647815A1 (de) * 1993-10-08 1995-04-12 Framatome Dampferzeuger mit übereinandergesetzten Blockierungselementen in einer Rohrgasse
FR2711009A1 (fr) * 1993-10-08 1995-04-14 Framatome Sa Générateur de vapeur à éléments de blocage de la rue d'eau superposés.
US5529020A (en) * 1993-10-08 1996-06-25 Framatome Tube lane pivoting device for nuclear steam generator with superposed elements
WO1996028690A1 (de) * 1995-03-15 1996-09-19 Siemens Aktiengesellschaft Flexible lanze zum bearbeiten oder inspizieren eines rohrbodens eines dampferzeugers
US6192904B1 (en) 1995-03-15 2001-02-27 Siemens Aktiengesellschaft Flexible lance for machining or inspecting a tube bottom of a steam generator
EP0780627A1 (de) * 1995-12-22 1997-06-25 Framatome Verfahren und Vorrichtung zur Reinigung der Endplatte eines Wärmetauschers vom Innern des Wärmetauscherbündels
FR2742858A1 (fr) * 1995-12-22 1997-06-27 Framatome Sa Procede et dispositif de nettoyage d'une plaque tubulaire d'un echangeur de chaleur depuis l'interieur du faisceau de l'echangeur de chaleur
US5782255A (en) * 1995-12-22 1998-07-21 Framatome Method and device for cleaning a tube plate of a heat exchanger from inside the bundle of the heat exchanger
US7050543B2 (en) 2002-11-06 2006-05-23 Feinfocus Röntgen-Systeme GmbH Microfocus X-ray tube

Also Published As

Publication number Publication date
EP0077255B1 (de) 1986-01-02
ES516093A0 (es) 1983-06-01
ZA826909B (en) 1983-07-27
DE3268322D1 (en) 1986-02-13
JPS58127003A (ja) 1983-07-28
ES8306244A1 (es) 1983-06-01
KR840002088A (ko) 1984-06-11
FR2514108B1 (fr) 1986-06-13
KR880001503B1 (ko) 1988-08-16
FR2514108A1 (fr) 1983-04-08
JPS615043B2 (de) 1986-02-15
CA1190104A (en) 1985-07-09
US4424769A (en) 1984-01-10

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