WO2010037869A1 - Perfectionnements à la détection de dépôts comportant au moins un matériau ferromagnétique sur ou à proximité de la paroi externe d'un tube - Google Patents
Perfectionnements à la détection de dépôts comportant au moins un matériau ferromagnétique sur ou à proximité de la paroi externe d'un tube Download PDFInfo
- Publication number
- WO2010037869A1 WO2010037869A1 PCT/EP2009/062907 EP2009062907W WO2010037869A1 WO 2010037869 A1 WO2010037869 A1 WO 2010037869A1 EP 2009062907 W EP2009062907 W EP 2009062907W WO 2010037869 A1 WO2010037869 A1 WO 2010037869A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tube
- source
- electric motor
- deposits
- intensity
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9013—Arrangements for scanning
- G01N27/902—Arrangements for scanning by moving the sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
Definitions
- the present invention relates to the general field of magnetic detection methods and devices and more particularly to the field of methods and devices for detecting fouling or clogging by deposits of ferromagnetic materials on or in the vicinity of cooling tubes of a steam generator of a pressurized water nuclear reactor called REP.
- each PWR nuclear power plant generally comprising three or four steam generators
- said steam generator consists of a confinement enclosure 5 receiving the primary circuit 10 and the secondary circuit 15.
- the heat exchange between the primary circuit 10 and the secondary circuit 15 is through a plurality of inverted U-shaped tubes 20.
- Said tubes 20 are held in place by spacer plates 25 immobilized by tie rods fixed at the bottom of the steam generator.
- FIG. 2 which shows a perspective view of a detail of the spacer plates 25 and tubes 20, said plates spacers 25 comprise cross-shaped holes 4 called quadrifollings through which pass said cylindrical tubes.
- the amount of reagents to be injected depends on the amount of oxides present in the steam generators.
- One of the aims of the invention is thus to remedy these drawbacks by proposing a method and a device for detecting deposits comprising at least one ferromagnetic material on or near the outer wall of a tube, more particularly intended for deposit detection on or near the tubes of a steam generator of a nuclear power plant PWR type, simple and inexpensive design, with high accuracy and high reliability.
- a detection device comprising, as illustrated in FIG. 3, a probe 105, for example a magnet (s).
- a method for detecting fouling or clogging deposits comprising at least one ferromagnetic material, such as nickel, magnetite or the like, on or near the outer wall of a tube, characterized in that it comprises at least the following stages of: positioning and locking in altitude of a magnetised source inside the tube,
- the invention also proposes a device that implements such a method.
- FIG. 1 is a torn perspective view of a steam generator of PWR power plants
- FIG. 2 is a perspective view of a detail of the tubes passing through the quadrifollages of the spacer plates, said quadrifollings comprising so-called clogging deposits;
- FIG. 4 is a schematic perspective representation illustrating a detection device according to a possible embodiment of the invention
- Fig. 5 is a block diagram illustrating various steps for a possible embodiment for the invention
- FIGS. 6a and 6b respectively illustrate different possible positions of the permanent magnet with respect to the foliated passage tube, as well as the acquisition curve obtained by moving said permanent magnet with respect to the various unobstructed foliated passages, FIG. as for it, three successive positions of the rotating magnetic probe with respect to the folate passage of the tube represented in FIG. 6a;
- FIGS. 7a to 7c correspond to FIGS. 6a to 6c in the case this time where four foliated passages are obstructed;
- FIGS. 8a and 8b correspond to FIGS. 6a and 6b in the case where three foliated passages are obstructed;
- FIGS. 9a and 9b correspond to FIGS. 6a and 6b in the case where two foliated passages are obstructed; - Figures 10a and 10b correspond to Figures 6a and 6b in the case where a folate passage is obstructed;
- FIG. 11 illustrates the control cycle of a device of the type of that illustrated in FIG. 4;
- FIG. 12 illustrates an example of acquisition curves obtained with such a device.
- a detection device 200 which comprises, in a tube 215, a magnetized source probe 205 which comprises, for example, one or more permanent magnets, as well as means 210 for the rotational drive of said source 205 in said tube 215.
- the source 205 comprises a single permanent magnet 206 supported by a plate 207 of soft iron itself mounted on a support 208 made of stainless steel.
- the magnetic plane PM of the permanent magnet 206 has also been shown in the figure. It is radial with respect to the cylinder constituted by the tube 215.
- Said rotation drive means 210 consist in particular of an electric geared motor 211.
- the electric motor of this geared motor 211 is connected to a device 212 for measuring the supply current of said motor, for example an ammeter, itself connected to a computer 213 of PC type.
- electric motor to determine the obstructed foliated passages at the spacers, as well as the depths (altitudes) where the deposits are.
- a propulsion sheath 300 or a geared motor type system and screw / nut also ensures the positioning of the probe at a given altitude therein.
- a locking system 301 makes it possible, for example by clamping, to maintain the probe at this altitude while the gearmotor 211 rotates it in the tube 215.
- the probe is initially positioned at altitude, at the height of the spacer plate 265 that is to be tested (step I).
- step II The position of the probe at altitude in the tube is then blocked by means 301 (step II). Once thus positioned: the probe 200 is rotated on itself by the geared motor 211, with a given servocontrol, for example at a constant speed; and during this rotation, the consumption current of the electric motor of the gearmotor 211 (step III) is acquired.
- Step IV the probe is unlocked and incrementally displaced by means of the propulsion sheath 300 or any other equivalent means. Steps II to IV are then repeated on the one hand as a function of the number of increments necessary to cover the width of the spacer plate and on the other hand according to the desired accuracy thereon.
- the computer 213 After acquiring all the analysis plans corresponding to these different incremental steps, the computer 213 analyzes the various current or power consumption curves (step V).
- the current or power consumption compared with the input signal is compared in the case of a spacer plate free from clogging.
- the comparison can also be made on other calibrated reference signals representative of dimensional data (standard tubes).
- the probe 205 will be in minimal attraction at the points C, E, G, and in maximum attraction at the points, D, F, H.
- the attraction forces are lower than in the case of an unobstructed foliated passage.
- the attraction forces depend on the gap between the permanent magnet and the deposits.
- the foliated passages PF are not obstructed, the attractive forces are important at the centering sectors of the tube.
- the passages are obstructed, there are fewer variations in the gap and therefore less variations in the attraction forces.
- the power variation supplied by the motor is correlated with the volume of the deposits (see double arrow DE in FIG.
- Figure 11 illustrates the control cycle of the motions given to the permanent magnet 206.
- Said magnet 206 is first positioned at a certain height relative to the spacer.
- FIG. 12 is a 3D representation on which the curves obtained for four analysis planes PA-A, PA-B, PA-C, PA-D (equidistant from 3 mm) were carried. A fifth curve has been shown which corresponds to a reference curve.
- the sealing depth is approximately 7.5 mm.
- the shape of the curve in the plane of the PA-C analysis shows amplitudes lower than the level of the peaks: the thickness at the level of the deposits is greater at this level.
- the algorithm implemented by the computer 213 implements the comparison with the reference curve and analyzes the amplitudes of the peaks to deduce the distribution of the deposits and, where appropriate, their thickness.
- the magnetic probe can admit a rotation of 450 degrees and incremental steps of 0.5 to 1 mm.
- the analysis of the clogging of the spacer plates of a steam generator tube can be done advantageously by using, in a first step, an axial sounding with a structure of the type described in application FR0853200 (structure of FIG. moving a magnetic source inside the tube in the direction of its length by means of an electric motor, measuring the intensity of the current in the electric motor, and determining the position and / or the thickness and / or the volume of said deposit as a function of the variations in the intensity of the current measured in the electric motor), followed in a second step by a rotary sounding of the type just described.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009801393594A CN102171558A (zh) | 2008-10-03 | 2009-10-05 | 对位于管的外壁之上或附近的包括至少一种铁磁材料的沉积物的检测的改进 |
EP09783746A EP2342554A1 (fr) | 2008-10-03 | 2009-10-05 | Perfectionnements à la détection de dépôts comportant au moins un matériau ferromagnétique sur ou à proximité de la paroi externe d'un tube |
JP2011529577A JP2012504756A (ja) | 2008-10-03 | 2009-10-05 | 管の外壁上又は外壁に近接した少なくとも1つの強磁性体を含む付着物の検出の改良 |
US13/122,133 US20110241660A1 (en) | 2008-10-03 | 2009-10-05 | The detection of deposits comprising at least one ferromagnetic material on or close to the external wall of a tube |
ZA2011/02438A ZA201102438B (en) | 2008-10-03 | 2011-04-01 | Improvements in the detection of deposits comprising at least one ferromagnetic material on or close to the external wall of a tube |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0856708A FR2936875B1 (fr) | 2008-10-03 | 2008-10-03 | Perfectionnements a la detection de depots comportant au moins un materiau ferromagnetique sur ou a proximite de la paroi externe d'un tube |
FR0856708 | 2008-10-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010037869A1 true WO2010037869A1 (fr) | 2010-04-08 |
Family
ID=40626872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/062907 WO2010037869A1 (fr) | 2008-10-03 | 2009-10-05 | Perfectionnements à la détection de dépôts comportant au moins un matériau ferromagnétique sur ou à proximité de la paroi externe d'un tube |
Country Status (8)
Country | Link |
---|---|
US (1) | US20110241660A1 (fr) |
EP (1) | EP2342554A1 (fr) |
JP (1) | JP2012504756A (fr) |
KR (1) | KR20110083639A (fr) |
CN (1) | CN102171558A (fr) |
FR (1) | FR2936875B1 (fr) |
WO (1) | WO2010037869A1 (fr) |
ZA (1) | ZA201102438B (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012141271A (ja) * | 2011-01-06 | 2012-07-26 | Mitsubishi Heavy Ind Ltd | 付着物計測装置及び付着物計測方法並びに付着物計測プログラム |
JP2013088332A (ja) * | 2011-10-20 | 2013-05-13 | Mitsubishi Heavy Ind Ltd | 挿通孔の閉塞率評価システム、閉塞率評価方法及び閉塞率評価プログラム |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2931241B1 (fr) * | 2008-05-16 | 2010-05-28 | Electricite De France | Procede et dispositif de detection de depots comportant au moins un materiau ferromagnetique sur ou a proximite de la paroi externe d'un tube |
FR2960336B1 (fr) * | 2010-05-19 | 2012-06-22 | Areva Np | Ensemble et procede de detection et de mesure du taux de colmatage des passages d'eau dans un circuit secondaire d'un reacteur nucleaire a eau sous pression |
FR2999776B1 (fr) * | 2012-12-19 | 2015-01-09 | Electricite De France | Procede d'evaluation du colmatage d'un echangeur thermique |
CN114923131B (zh) * | 2022-05-18 | 2024-01-26 | 昆明理工大学 | 一种检测管道淤积的方法及装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2319898A1 (fr) * | 1975-07-28 | 1977-02-25 | Westinghouse Electric Corp | Transducteur magnetique en pont |
FR2834341A1 (fr) * | 2001-12-28 | 2003-07-04 | Commissariat Energie Atomique | Sonde controle, par courants de foucault, d'un materiau entourant un tube, procede de traitement des signaux fournis par la sonde, application aux echangeurs de chaleur |
US20040257072A1 (en) * | 2003-06-19 | 2004-12-23 | Rock Samson | Dual-sensitivity eddy current test probe |
-
2008
- 2008-10-03 FR FR0856708A patent/FR2936875B1/fr active Active
-
2009
- 2009-10-05 JP JP2011529577A patent/JP2012504756A/ja active Pending
- 2009-10-05 EP EP09783746A patent/EP2342554A1/fr not_active Withdrawn
- 2009-10-05 WO PCT/EP2009/062907 patent/WO2010037869A1/fr active Application Filing
- 2009-10-05 US US13/122,133 patent/US20110241660A1/en not_active Abandoned
- 2009-10-05 KR KR1020117009987A patent/KR20110083639A/ko not_active Application Discontinuation
- 2009-10-05 CN CN2009801393594A patent/CN102171558A/zh active Pending
-
2011
- 2011-04-01 ZA ZA2011/02438A patent/ZA201102438B/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2319898A1 (fr) * | 1975-07-28 | 1977-02-25 | Westinghouse Electric Corp | Transducteur magnetique en pont |
FR2834341A1 (fr) * | 2001-12-28 | 2003-07-04 | Commissariat Energie Atomique | Sonde controle, par courants de foucault, d'un materiau entourant un tube, procede de traitement des signaux fournis par la sonde, application aux echangeurs de chaleur |
US20040257072A1 (en) * | 2003-06-19 | 2004-12-23 | Rock Samson | Dual-sensitivity eddy current test probe |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012141271A (ja) * | 2011-01-06 | 2012-07-26 | Mitsubishi Heavy Ind Ltd | 付着物計測装置及び付着物計測方法並びに付着物計測プログラム |
US9207211B2 (en) | 2011-01-06 | 2015-12-08 | Mitsubishi Heavy Industries, Ltd. | Deposit measurement apparatus, deposit measurement method, and computer-readable storage medium storing deposit measurement program |
JP2013088332A (ja) * | 2011-10-20 | 2013-05-13 | Mitsubishi Heavy Ind Ltd | 挿通孔の閉塞率評価システム、閉塞率評価方法及び閉塞率評価プログラム |
Also Published As
Publication number | Publication date |
---|---|
KR20110083639A (ko) | 2011-07-20 |
CN102171558A (zh) | 2011-08-31 |
US20110241660A1 (en) | 2011-10-06 |
FR2936875A1 (fr) | 2010-04-09 |
JP2012504756A (ja) | 2012-02-23 |
ZA201102438B (en) | 2011-12-28 |
EP2342554A1 (fr) | 2011-07-13 |
FR2936875B1 (fr) | 2010-11-26 |
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