EP0475806B1 - Appareil de travail au laser, notamment pour le décontamination d'une conduite d'un réacteur nucléaire - Google Patents

Appareil de travail au laser, notamment pour le décontamination d'une conduite d'un réacteur nucléaire Download PDF

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Publication number
EP0475806B1
EP0475806B1 EP91402257A EP91402257A EP0475806B1 EP 0475806 B1 EP0475806 B1 EP 0475806B1 EP 91402257 A EP91402257 A EP 91402257A EP 91402257 A EP91402257 A EP 91402257A EP 0475806 B1 EP0475806 B1 EP 0475806B1
Authority
EP
European Patent Office
Prior art keywords
rail
pipe
laser beam
laser
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91402257A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0475806A2 (fr
EP0475806A3 (en
Inventor
Jean-Pierre Cartry
Georges Clar
Alain Martin
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 EP0475806A2 publication Critical patent/EP0475806A2/fr
Publication of EP0475806A3 publication Critical patent/EP0475806A3/fr
Application granted granted Critical
Publication of EP0475806B1 publication Critical patent/EP0475806B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/001—Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
    • G21F9/005—Decontamination of the surface of objects by ablation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
    • B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/021—Cleaning pipe ends or pipe fittings, e.g. before soldering

Definitions

  • the present invention relates to a laser working device intended to send a high power laser beam to work points which are difficult to access (WO-A 90/07988). It applies in particular to the decontamination by laser beam of a pipe or the like forming part of the primary water circuit of a steam generator of a nuclear power plant of the pressurized water type, or of the water box of a like steam generator.
  • the object of the invention is to provide an apparatus making it possible to easily transport high laser powers to work points which are difficult to access.
  • the apparatus shown in the drawings is intended to carry out the decontamination of a pipe section 1 of relatively large diameter belonging to the primary water circuit of a pressurized water nuclear reactor steam generator.
  • a pipe section 1 of relatively large diameter belonging to the primary water circuit of a pressurized water nuclear reactor steam generator.
  • it is a bent pipe section.
  • This device essentially consists of a support rail 2, a carriage 3 mounted mobile on this rail, a device 4 for producing a high power laser beam, and a device 5 for transporting this beam by airway to the interior wall of section 1.
  • the rail 2 of hexagonal section (Fig. 3), has a curved shape and, in service, its longitudinal axis is coincident with that of the section 1. It has on one side a straight extension 6 provided with a device 7 centering in the pipe section 8 adjacent to the section 1, this device 7 being expandable by means of a jack 9 provided at the end of the extension 6.
  • the rail 2 is extended by an indexer 10 which is a rail section of the same hexagonal section as the rail 2 and which can rotate around its axis in steps of 60 °, by means of a motor not shown housed in the rail.
  • the indexer 10 rotates on a shaft integral with the rail 2 and which carries at its free end the hub 11 of a spider 12, which in turn carries a centering ring 13. by actuation of several jacks 14 mounted radially on this ring, the axis of the rail 2 can be made to coincide with that of the bent section 1 in a sufficiently precise manner.
  • the carriage 3 has a hexagonal section homothetic to that of the rail 2, and between them are interposed on the one hand two pairs of idle rollers 15, on the other hand a pair of drive rollers 16 driven by a geared motor 17.
  • the carriage can thus be brought to any point along the length of the rail 2 or on one of the extensions 6 and 10 thereof.
  • the device 4 for producing the laser beam consists firstly of a laser generator 18 of the YAG pulse type, mounted on a fixed support 19 outside the pipe to be treated and equipped with appropriate supply means, control and cooling, and on the other hand a laser beam amplifier 20 fixed on the carriage 3.
  • the output of the generator 18 is connected to the input of an optical fiber 21 whose output is connected to the amplifier 20 input.
  • the latter is adapted to provide a parallel amplified beam at its output.
  • the optical fiber can be adapted to transport a maximum power of 20MW, the generator 18 to provide a peak power of this order and the amplifier 20 to have an amplification factor of 5, which provides a laser beam at the output of this amplifier having a peak power of the order of 100MW, suitable for this application.
  • the air transport device 5 comprises a guide tube 21, the base of which (Fig. 2) has a hole 22 for the entry of the amplified laser beam situated opposite the output of the amplifier 20.
  • a deflection mirror 23 inclined at 45 ° is fixed in the guide tube opposite the hole 22.
  • the assembly of the guide tube and the mirror can be driven in an alternating angular movement in a radial plane by a motor 24 carried by the carriage 3.
  • a suction nozzle 25 is slidably mounted at the free end of the guide tube 21 and is pressed against the interior wall of the pipe by a spring 26. The support of this nozzle on the pipe takes place via a floating tubular end piece 27 fitted with rollers.
  • a flexible pipe 28 connects the nozzle 25 to a pump (not shown). If the products sucked up can be discharged into the pipe itself, this pump can be fixed on the carriage 3. Otherwise, it is mounted at a fixed position outside the pipe to be treated.
  • a flexible umbilicus 29 leads to the carriage 3 the optical fiber 21, the electric wires supplying the motors 17 and 24 and the amplifier 20, and possibly pipes (not shown) conveying water for cooling the mirror. and the amplifier and the flexible hose 28.
  • the motor 24 drives the guide tube 21 back and forth so that the end piece 27 moves on the inner wall of the section 1 along an arc of amplitude circle substantially greater than 60 °, and the device 4 for producing the laser beam is switched on.
  • the amplified laser beam strikes the wall after reflection on the mirror 23 and ensures the decontamination of the point of impact and therefore of the entire swept arc.
  • the carriage is advanced on the rail 2 by a step depending on the radius of the focal spot of the laser beam, so that an entire sector of more than 60 ° of the section 1 is decontaminated.
  • the carriage is brought to the indexer 10, and the latter is rotated by 60 °, which brings the carriage 3 into a new angular position, and the decontamination of the following sector of the section 1 is carried out as described above, with overlap from the previous sector.
  • the device can be used regardless of the shape and orientation in the space of the pipe to be treated.
  • the distance between the mirror 23 and the wall of the pipe does not need to be adjusted with great precision.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Laser Beam Processing (AREA)
  • Lasers (AREA)
  • Cleaning In General (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
EP91402257A 1990-09-12 1991-08-19 Appareil de travail au laser, notamment pour le décontamination d'une conduite d'un réacteur nucléaire Expired - Lifetime EP0475806B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9011281 1990-09-12
FR9011281A FR2666523A1 (fr) 1990-09-12 1990-09-12 Appareil de travail au laser, notamment pour la decontamination d'une conduite d'un reacteur nucleaire.

Publications (3)

Publication Number Publication Date
EP0475806A2 EP0475806A2 (fr) 1992-03-18
EP0475806A3 EP0475806A3 (en) 1993-02-03
EP0475806B1 true EP0475806B1 (fr) 1995-11-29

Family

ID=9400268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402257A Expired - Lifetime EP0475806B1 (fr) 1990-09-12 1991-08-19 Appareil de travail au laser, notamment pour le décontamination d'une conduite d'un réacteur nucléaire

Country Status (11)

Country Link
US (1) US5256848A (enrdf_load_stackoverflow)
EP (1) EP0475806B1 (enrdf_load_stackoverflow)
JP (1) JPH04289500A (enrdf_load_stackoverflow)
KR (1) KR920006044A (enrdf_load_stackoverflow)
CS (1) CS278691A3 (enrdf_load_stackoverflow)
DE (1) DE69114970T2 (enrdf_load_stackoverflow)
ES (1) ES2080923T3 (enrdf_load_stackoverflow)
FI (1) FI95878C (enrdf_load_stackoverflow)
FR (1) FR2666523A1 (enrdf_load_stackoverflow)
RU (1) RU2038572C1 (enrdf_load_stackoverflow)
ZA (1) ZA917213B (enrdf_load_stackoverflow)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0574564B1 (en) * 1992-01-04 1997-04-16 British Nuclear Fuels PLC Method of treating a surface contaminated with radionuclides
US5226107A (en) * 1992-06-22 1993-07-06 General Dynamics Corporation, Space Systems Division Apparatus and method of using fiber-optic light guide for heating enclosed test articles
US5373140A (en) * 1993-03-16 1994-12-13 Vernay Laboratories, Inc. System for cleaning molding equipment using a laser
DE4413159C2 (de) * 1994-04-15 1996-09-12 Jet Laser Systeme Ges Fuer Obe Bearbeitungskopf zur Verwendung beim großflächigen und umweltschonenden Entfernen einer Schicht aus Lack oder Kunststoff, beispielsweise Polytetrafluoräthylen
GB9412237D0 (en) * 1994-06-17 1994-08-10 British Nuclear Fuels Plc Glazing of bricks
DE19517218C1 (de) * 1995-05-11 1996-07-18 Uniroyal Englebert Gmbh Verfahren und Vorrichtung zum Reinigen von Vulkanisationsformen
JP3044188B2 (ja) * 1996-02-15 2000-05-22 核燃料サイクル開発機構 レーザー除染法
FR2777810B1 (fr) * 1998-04-28 2000-05-19 Air Liquide Procede et dispositif de traitement de la surface interne d'une bouteille de gaz
FR2819622B1 (fr) * 2001-01-17 2004-04-02 Maintenance Nucleaire Soc D Procede et dispositif de decontamination radiactive d'une surface situee a l'interieur d'un corps creux
GB0222341D0 (en) * 2002-09-26 2002-11-06 British Nuclear Fuels Plc Surface treatment of concrete
CN100374237C (zh) * 2006-03-23 2008-03-12 北京工业大学 便携式激光清洗系统
ITMI20070985A1 (it) * 2007-05-16 2008-11-17 Adige Sala Spa Procedimento e dispositivo per la pulizia della superficie circonferenziale esterna di tubi metallici saldati
DE102007041408A1 (de) * 2007-08-31 2009-03-05 Westinghouse Electric Germany Gmbh Vorrichtung und Verfahren zur Behandlung und/oder Dekontamination von Oberflächen
FR3002363B1 (fr) 2013-02-21 2015-03-20 Andra Procede de decontamination de tubes de generateur de vapeur
CN103736693B (zh) * 2014-01-10 2016-08-17 苏州热工研究院有限公司 一种用于核电站放射性污染去污的激光清洁系统
US10618085B2 (en) * 2017-05-31 2020-04-14 Taiwan Semiconductor Manufacturing Co., Ltd. Apparatus and methods for exhaust cleaning
MX2020001176A (es) 2017-07-31 2020-09-25 Gregory Mcraney Sistema para tratar con laser una superficie de tubo.
CN109226116A (zh) * 2018-09-17 2019-01-18 江苏大学 一种激光清洗弯曲钢管内壁的装置
CN109277372B (zh) * 2018-11-12 2020-08-14 中国工程物理研究院激光聚变研究中心 一种道路交通标线的激光清洗方法
CN112827946B (zh) * 2021-01-05 2022-04-19 湖南大学 一种耐辐射管道激光清洗装置及使用方法
CN113634557B (zh) * 2021-08-18 2022-08-02 绍兴文理学院 一种对铁质金属管材表面进行除锈的激光除锈器
CN114011804B (zh) * 2021-11-01 2022-08-19 温州大学 一种用于管道内外壁清洗的激光清洗机
CN114481156B (zh) * 2021-12-20 2023-09-29 上海新力动力设备研究所 一种薄壁筒状壳体的清洗系统及清洗方法
US20240269718A1 (en) * 2023-02-09 2024-08-15 Chevron U.S.A. Inc. Systems and methods for removal of contaminants

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4157096A (en) * 1978-06-19 1979-06-05 Amf Incorporated Apparatus for cleaning threaded pipe ends
SE451915B (sv) * 1984-03-09 1987-11-02 Studsvik Energiteknik Ab Forfarande for dekontaminering av tryckvattenreaktorer
CA1230806A (en) * 1984-05-29 1987-12-29 Clifton G. Slater Ceric acid decontamination of nuclear reactors
JPS63241399A (ja) * 1987-03-30 1988-10-06 株式会社東芝 レ−ザ除染装置
JPH01203090A (ja) * 1988-02-09 1989-08-15 Tomoki Takashima パイプクリーニング装置
FR2630667B1 (fr) * 1988-04-29 1990-07-13 Breton Reparation Ferrov Procede de decapage d'une surface couverte d'un revetement protecteur et tete de projection pour la mise en oeuvre du procede
EP0355628B1 (de) * 1988-08-24 1993-11-10 Siemens Aktiengesellschaft Verfahren zur chemischen Dekontamination der Oberfläche eines metallischen Bauteils einer Kernreaktoranlage
FR2641718B1 (fr) * 1989-01-17 1992-03-20 Ardt Procede de nettoyage de la surface de matieres solides et dispositif de mise en oeuvre de ce procede, utilisant un laser impulsionnel de puissance, a impulsions courtes, dont on focalise le faisceau sur la surface a nettoyer

Also Published As

Publication number Publication date
EP0475806A2 (fr) 1992-03-18
CS278691A3 (en) 1992-04-15
FR2666523B1 (enrdf_load_stackoverflow) 1995-03-03
US5256848A (en) 1993-10-26
FI914168L (fi) 1992-03-13
DE69114970T2 (de) 1996-04-18
FR2666523A1 (fr) 1992-03-13
ES2080923T3 (es) 1996-02-16
EP0475806A3 (en) 1993-02-03
KR920006044A (ko) 1992-04-27
FI914168A0 (fi) 1991-09-04
FI95878C (fi) 1996-04-10
JPH04289500A (ja) 1992-10-14
DE69114970D1 (de) 1996-01-11
FI95878B (fi) 1995-12-29
ZA917213B (en) 1993-04-28
RU2038572C1 (ru) 1995-06-27

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