FR2568985A1 - Novel principle for removing deposits accumulated at the tube plate of steam generators of pressurised water nuclear power stations - Google Patents

Novel principle for removing deposits accumulated at the tube plate of steam generators of pressurised water nuclear power stations Download PDF

Info

Publication number
FR2568985A1
FR2568985A1 FR8403965A FR8403965A FR2568985A1 FR 2568985 A1 FR2568985 A1 FR 2568985A1 FR 8403965 A FR8403965 A FR 8403965A FR 8403965 A FR8403965 A FR 8403965A FR 2568985 A1 FR2568985 A1 FR 2568985A1
Authority
FR
France
Prior art keywords
guide
launching
suction
water
tube plate
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.)
Withdrawn
Application number
FR8403965A
Other languages
French (fr)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR8403965A priority Critical patent/FR2568985A1/en
Publication of FR2568985A1 publication Critical patent/FR2568985A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

Novel device for removing deposits accumulated at the tube plate of steam generators of pressurised water nuclear power stations. A system for removing the sludge which can accumulate between the heat exchanger tubes fixed to the tube plate of a steam generator. In brief, the system for removing the sludge comprises a lancing assembly which can move along a guide which is fixed by an adapted flange to the handhole or eyehole and to the central pillar or to the handhole or eyehole diametrically opposite the first by a hydraulically controlled attachment or a flange which is also adapted. The said system is characterised in that the medium pressure lateral driving water injection and low pressure suction assemblies essentially comprise tube assemblies with regulable and adjustable lengths according to the quantity of deposit to be removed and according to the position of the mobile lancing device along its guide and controlled from the same side of the steam generator. The advantage of the said system lies in the fact that the control itself of the lancing is performed remotely, the presence of a single operator is required near the steam generator. In order to clarify the advantage of the said system, the regulation of the tubes for suction and injection of the water for driving the mixture of deposit and water consists in optimising the whole operation for cleaning the tube plate of the said steam generators.

Description

La présente invention se réfère à un nouveau principe d'élimination des dépôts accumulés au niveau de la face supérieure de la plaque tubulaire d'un générateur de vapeur à faisceau tubulaire échangeur en épingle à cheveux avec ru d'eau associé à une chaudière d'usine de production d'électricité basée sur la fission d'uranium et refroidie par eau légère pressurisée comprenant un dispositif d'entrainement et de succion desdits dépôts réglable en longueur et position par intervention manuelle directe ou télécommandée. The present invention refers to a new principle for eliminating deposits accumulated at the upper face of the tube plate of a steam generator with a hairpin exchanger tube bundle bundle of water associated with a boiler. Electricity production plant based on fission of uranium and cooled by pressurized light water comprising a device for driving and sucking said deposits adjustable in length and position by direct manual or remote-controlled intervention.

L'ensemble des annexes du dispositif dont est l'objet le présent brevet, à savoir pompes, filtres et divers systèmes de commande et asservissement ne relève pas dudit brevet. All the annexes to the device which is the subject of this patent, namely pumps, filters and various control and servo systems do not fall under said patent.

Si l'on se réfère à la figure 1 : la figure 1.A. représente une vue par en-dessus de la plaque tubulaire d'un générateur de vapeur, la figure 1.B. représente une coupe transversale de ladite région du générateur de vapeur. La description se réfèrera indifféremment aux figures 1.A. et l.B.. Au cours d'un arrêt du réacteur à eau pressurisée, le générateur de vapeur est vidé de son contenu en eau et les trous d'oeil ou de poing 1 et 2 prévus pour les opérations de maintenance peuvent être ouverts. If we refer to Figure 1: Figure 1.A. shows a view from above of the tube plate of a steam generator, Figure 1.B. shows a cross section of said region of the steam generator. The description will refer equally to Figures 1.A. and l.B .. During a shutdown of the pressurized water reactor, the steam generator is emptied of its water content and the eye or fist holes 1 and 2 provided for maintenance operations can be opened.

Afin de procéder au nettoyage de la plaque tubulaire 3 du générateur de vapeur, un dispositif de lançage haute pression 4 est introduit indifféremment par l'un des trous d'acces. Dans la disposition typique telle que représentée dans les figures l.A. et l.B., ce dispositif est introduit par le trou de poing 1 et fixé à celui-ci par une flasque appropriée 5.Le dispositif de lançage proprement dit 6 se déplace alors le long d'un guide 7 dont les détails de conception sont d'importance secondaire et ne relèvent pas de la présente invention sinon que ledit dispositif de lançage est pour la bonne compréhension de la présente invention capable d'envoyer un jet d'eau haute pression entre les rangées 8 des tubes échangeurs et ceci par oscillation de l'ensemble de lançage, ceci dans le cas des échangeurs dont le pas de disposition des tubes est carré. In order to clean the tubular plate 3 of the steam generator, a high-pressure launching device 4 is introduced either through one of the access holes. In the typical arrangement as shown in Figures l.A. and IB, this device is introduced through the fist hole 1 and fixed to the latter by an appropriate flange 5. The launching device proper 6 then moves along a guide 7 whose design details are of secondary importance and do not fall under the present invention except that said launching device is for the good understanding of the present invention capable of sending a jet of high pressure water between the rows 8 of the exchanger tubes and this by oscillation of the launching assembly, this in the case of exchangers in which the tube arrangement pitch is square.

La particularité du procédé décrit et objet de la présente invention est essentiellement la mobilité relative des éléments de succion et d'entrainement des dépôts. The particularity of the process described and object of the present invention is essentially the relative mobility of the suction and drive elements of the deposits.

Les éléments de succion et d'entraînement des dépôts sont introduits par le trou de poing ou d'oeil 2 non utilisé pour l'introduction du dispositif de lançage précédemment décrit. Lesdits éléments mobiles sont un ensemble de tuyaux souples 9 et 10 de longueur réglable sur toute la périphérie du générateur de vapeur. Les position respectives 11 et 12 des extrémités desdits tuyaux sont précisées par l'opérateur en fonction de paramètres tels que position du dispositif de lançage 6 le long de son guide 7, quantité de dépôt à éliminer, débits des lançage, succion et entrainement. L'homme de l'art apprécie et juge du choix des positions de succion et d'entraînement pour le bon déroulement de l'opération. The suction and drive elements of the deposits are introduced through the fist or eye hole 2 not used for the introduction of the launching device described above. Said movable elements are a set of flexible pipes 9 and 10 of adjustable length over the entire periphery of the steam generator. The respective positions 11 and 12 of the ends of said pipes are specified by the operator as a function of parameters such as position of the launching device 6 along its guide 7, quantity of deposit to be eliminated, flow rates of the launching, suction and training. Those skilled in the art appreciate and judge the choice of suction and training positions for the smooth running of the operation.

L'ensemble de positionnement 13 des tuyaux 9 et 10 peut être avantageusement et simplement constitué d'une série de galets à commande hydraulique autorisation translation desdits tuyaux et arrêt de ceux-ci dans les positions choisies 11 et 12. La position des extrémités 11 et 12 desdits tuyaux peut avantageusement être repérée par tout système visuel tel que marquage externe ou mécanique tel que comptage des tours d'un galet de recopie ou tout autre dispositif d'utilisation simplifiée ne faisant pas référence dans son principe a la présente invention mais cependant envisagé pour la bonne conduite de l'opération d'elimination des dépôts accumulés au niveau de la face supérieure de la plaque tubulaire d'un générateur de vapeur. The positioning assembly 13 of the pipes 9 and 10 may advantageously and simply be constituted by a series of rollers with hydraulic control allowing translation of said pipes and stopping them in the chosen positions 11 and 12. The position of the ends 11 and 12 of said pipes can advantageously be identified by any visual system such as external or mechanical marking such as counting the revolutions of a feedback roller or any other simplified use device which does not in principle refer to the present invention but is nevertheless envisaged for the proper conduct of the operation to remove deposits accumulated at the upper face of the tube plate of a steam generator.

L'opérateur choisira d'actionner le dispositif d'entrainement ou non selon son jugement. La présente invention ne privilégie donc pas les positions respectives des extrémités 11 et 12 des tuyaux 9 et 10 d'entraînement et de succion des dépôts.  The operator will choose to activate the training device or not according to his judgment. The present invention therefore does not favor the respective positions of the ends 11 and 12 of the pipes 9 and 10 for driving and sucking deposits.

Claims (8)

REVEND ICAT IONSRESELL ICAT IONS 1. Méthode selon le procédé décrit et consistant à éliminer par lançage haute pression les dépôts accumulés au niveau de la face supérieure de la plaque tubulaire des générateurs de vapeur à faisceau tubulaire échangeur en épingle à cheveux avec ru d'eau comprenant un dispositif de succion desdits dépôts réglable en longueur et position par intervention manuelle directe ou télécommandée autorisant un lançage unilatéral et une succIon des dépits également unilatérale avec entrainement desdits dépôts par une élément tubulaire positionné sensiblement à l'opposé de l'lement de succion par rapport à l'axe du ru d'eau. 1. Method according to the method described and consisting in eliminating by high pressure launching the deposits accumulated at the level of the upper face of the tubular plate of the steam generators with tubular bundle hairpin exchanger with ru of water comprising a suction device of said deposits adjustable in length and position by direct manual or remote-controlled intervention allowing unilateral launching and also unilateral deposition of the deposits with entrainment of said deposits by a tubular element positioned substantially opposite to the suction element relative to the axis of water ru. 2. Méthode selon la revendication 1 comportant en outre des dispositifs directionnels à l'extrémité de chacun des tubes d'entrainement ou de succion choisis selon le mode fonctionnel desdits tubes. 2. Method according to claim 1 further comprising directional devices at the end of each of the drive or suction tubes chosen according to the functional mode of said tubes. 3. Méthode selon lVune des revendications 1 ou 2 appliquée d'une manière générale à tout générateur de vapeur à faisceau tubulaire en épingle à cheveux et ru d'eau comportant un pilier central. 3. Method according to one of claims 1 or 2 applied generally to any steam generator with a hairpin tubular bundle and a ru of water comprising a central pillar. L'opération de lançage s'effectuant alors en deux temps, l'ensemble consitué par le guide et la tête de lançage et l'ensemble succion-entrainement étant simplement intervertis dans leur position respective au cours de l'opération, le principe général décrit dans la présente InventIon restant le même-. The launching operation then being carried out in two stages, the assembly constituted by the guide and the launching head and the suction-drive assembly being simply reversed in their respective position during the operation, the general principle described in the present InventIon remaining the same-. 4. Méthode selon l'une des revendications l ou 2 appliquée d'une manière générale à tout générateur de vapeur à faisceau tubulaire en épingle à cheveux et ru d'eau et ne comportant pas de pilier central modifiée dans ce dernier cas indîfferemment selon que lesdits générateurs sont équipés de trous de poing ou d'oeil se caractérisAnt en ce que le guide du dispositif de lançage est fixé a chacun desdits trous, le dispositif de réglage des éléments d' entraînement et de succion étant modifié pour permettre l'attachement dudit guide de la manière précisée succintenent ci-après : introduction dudit guide et serrouillage par simple rotation d'un système d'attache à rotule au dispositif de fixation dudit ensemble d'entraSnement-succion.  4. Method according to one of claims l or 2 applied in general to any steam generator with a hairpin tube bundle and water ru and not comprising a central pillar modified in the latter case indifferently depending on whether said generators are equipped with fist or eye holes characterized in that the guide of the launching device is fixed to each of said holes, the device for adjusting the drive and suction elements being modified to allow the attachment of said guide in the manner specified below succintenent: introduction of said guide and locking by simple rotation of a ball joint attachment system to the fixing device of said drive-suction assembly. 5. Méthode selon les revendications 1 à 4 comportant en outre un système simple de visualisation des opérations alors que ces dernières sont en cours. L'ensemble, pouvant être télévisuel avec éclairage directionnel intégré, étant disposé aussi bien sur le dispositif proprement dit de lançage mobile le long de son guide qu'en un endroit privilégié dudit guide. 5. Method according to claims 1 to 4 further comprising a simple system for viewing operations while they are in progress. The assembly, which can be televisual with integrated directional lighting, being arranged both on the actual mobile launching device along its guide as in a privileged location of said guide. 6. Méthode selon les revendications 1 a 5 pouvant également inclure un injecteur d'entraînement actionné par un équipement tei que pompe centrifuge moyenne pression, ledit injecteur se déplaçant selon le jugement de l'opérateur simultanément au déplacement de l'élément mobile de lançage. 6. Method according to claims 1 to 5 can also include a drive injector actuated by equipment such as a medium pressure centrifugal pump, said injector moving according to the judgment of the operator simultaneously with the movement of the mobile launching element. 7. Méthode selon les revendications 1 à 6 applicable aux générateurs de vapeur comportant des entretoises ou autres dispositifs additionnels en regard d'ouverture d'accès telles que trous d'oeil ou de poing sous réserve que les modification mineures apportées au dispositif précédemment décrit n'altèrent pas les performances de ladite méthode. 7. Method according to claims 1 to 6 applicable to steam generators comprising spacers or other additional devices facing access opening such as eye or fist holes provided that minor modifications to the device described above n 'do not affect the performance of said method. 8. Méthode selon les revendications 1 à 7 applicable au nettoyage de générateurs de vapeur dont le pas de disposition des tubes est triangulaire sous réserve que l'homme de l'art modifie en conséquence l'élement mobile de lançage haute pression.  8. Method according to claims 1 to 7 applicable to the cleaning of steam generators whose tube arrangement pitch is triangular provided that those skilled in the art modify the mobile high pressure launching element accordingly.
FR8403965A 1984-03-14 1984-03-14 Novel principle for removing deposits accumulated at the tube plate of steam generators of pressurised water nuclear power stations Withdrawn FR2568985A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8403965A FR2568985A1 (en) 1984-03-14 1984-03-14 Novel principle for removing deposits accumulated at the tube plate of steam generators of pressurised water nuclear power stations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8403965A FR2568985A1 (en) 1984-03-14 1984-03-14 Novel principle for removing deposits accumulated at the tube plate of steam generators of pressurised water nuclear power stations

Publications (1)

Publication Number Publication Date
FR2568985A1 true FR2568985A1 (en) 1986-02-14

Family

ID=9302049

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8403965A Withdrawn FR2568985A1 (en) 1984-03-14 1984-03-14 Novel principle for removing deposits accumulated at the tube plate of steam generators of pressurised water nuclear power stations

Country Status (1)

Country Link
FR (1) FR2568985A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4858563A (en) * 1988-06-23 1989-08-22 Perry Richard C Water heater cleaning apparatus
EP0339288A1 (en) * 1988-04-19 1989-11-02 Westinghouse Electric Corporation Improved pressure pulse cleaning method
EP0339289A1 (en) * 1988-04-19 1989-11-02 Westinghouse Electric Corporation Improved pressure pulse cleaning method
US5006304A (en) * 1988-04-19 1991-04-09 Westinghouse Electric Corp. Pressure pulse cleaning method
EP0422266A1 (en) * 1989-10-11 1991-04-17 Westinghouse Electric Corporation Improved pressure pulse cleaning method
EP0422267A1 (en) * 1989-10-11 1991-04-17 Westinghouse Electric Corporation Improved pressure pulse cleaning method
FR2660479A1 (en) * 1990-04-03 1991-10-04 Assainissement Ste Regionale Lancing device, especially for cleaning the inside of a steam generator or the like
FR2665240A1 (en) * 1990-07-26 1992-01-31 Assainissement Ste Regionale Method and device for discharging sludge (slurries) and washing water inside a steam generator
US5092280A (en) * 1988-04-19 1992-03-03 Westinghouse Electric Corp. Pressure pulse cleaning apparatus
US8459277B2 (en) 2008-12-03 2013-06-11 Dominion Engineering, Inc. Chemical cleaning method and system with steam injection
US10502510B2 (en) 2016-02-09 2019-12-10 Babcock Power Services, Inc. Cleaning tubesheets of heat exchangers

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5092280A (en) * 1988-04-19 1992-03-03 Westinghouse Electric Corp. Pressure pulse cleaning apparatus
EP0339288A1 (en) * 1988-04-19 1989-11-02 Westinghouse Electric Corporation Improved pressure pulse cleaning method
EP0339289A1 (en) * 1988-04-19 1989-11-02 Westinghouse Electric Corporation Improved pressure pulse cleaning method
US5006304A (en) * 1988-04-19 1991-04-09 Westinghouse Electric Corp. Pressure pulse cleaning method
US4858563A (en) * 1988-06-23 1989-08-22 Perry Richard C Water heater cleaning apparatus
EP0422266A1 (en) * 1989-10-11 1991-04-17 Westinghouse Electric Corporation Improved pressure pulse cleaning method
EP0422267A1 (en) * 1989-10-11 1991-04-17 Westinghouse Electric Corporation Improved pressure pulse cleaning method
FR2660479A1 (en) * 1990-04-03 1991-10-04 Assainissement Ste Regionale Lancing device, especially for cleaning the inside of a steam generator or the like
FR2665240A1 (en) * 1990-07-26 1992-01-31 Assainissement Ste Regionale Method and device for discharging sludge (slurries) and washing water inside a steam generator
US8459277B2 (en) 2008-12-03 2013-06-11 Dominion Engineering, Inc. Chemical cleaning method and system with steam injection
US8999072B2 (en) 2008-12-03 2015-04-07 Westinghouse Electric Company Llc Chemical cleaning method and system with steam injection
US10502510B2 (en) 2016-02-09 2019-12-10 Babcock Power Services, Inc. Cleaning tubesheets of heat exchangers
US11561054B2 (en) 2016-02-09 2023-01-24 Thermal Engineering International (Usa) Inc. Cleaning tubesheets of heat exchangers

Similar Documents

Publication Publication Date Title
FR2568985A1 (en) Novel principle for removing deposits accumulated at the tube plate of steam generators of pressurised water nuclear power stations
US6128799A (en) Conduit interior smoothing device
EP0631089B1 (en) Apparatus for removing deposits from the tubesheet of a steam generator
EP0780627A1 (en) Process and apparatus for cleaning the end plate of a heat exchanger from the inner side of the heat exchanger bundle
EP2678865B1 (en) Steam generator inspection tool
EP0395167B1 (en) Device and method for making a borehole in the ground
EP0696719A1 (en) Liquid jet cleaning apparatus for a tubular plate of a heat exchanger and its use
FR2707335A1 (en) Method for re-establishing circulation in an extraction well and device for implementing this method
CN110813962B (en) Non-standard circular amplitude flow type secondary sedimentation tank full-automatic cleaning robot
EP0267080B1 (en) Apparatus for the internal and external quenching of tubular work pieces
FR2708336A1 (en) Installation for cleaning the water lance of a steam generator and its method of implementation.
EP0876872B1 (en) Device for the extraction of the tubes of heat exchangers with tube bundles and double plates
BE1004430A3 (en) Device for cleaning a steam generator.
US2481152A (en) Pipe and sewer cleaning apparatus
FR2914394A1 (en) Tool i.e. elongated flexible video probe, inserting device for inspecting connection zones in steam generator, has end link with cylinders that activate rotation of end link relative to link located at back in introducing direction of chain
FR2684482A1 (en) Device for intervention in a space defined by a cylindrical casing comprising at least two diametrically opposite openings
KR200344637Y1 (en) Waste material removal system of underwater construction
CN218655927U (en) Pipeline cleaning device for hydraulic engineering
CN220479635U (en) Pipeline inner wall cleaning device for non-excavation type pipeline restoration
CA1283299C (en) Covering structure intended for laying over a line or the like deposited on the seafloor
CN217105009U (en) Hydraulic engineering surface of water cleaning device
CN111139884B (en) A river course cleaning device for silting up riverbed
FR2754331A1 (en) High pressure water jet cleaning of steam generator tube plate
FR2629572A1 (en) Device for draining various products, and more particularly gas cylinders
FR2573907A1 (en) Process for collecting and removing the sludge formed in the steam generators of pressurised water nuclear reactors.

Legal Events

Date Code Title Description
ST Notification of lapse