CN117704947A - Sensor for measuring thickness of oxide film on inner wall of control rod guide tube - Google Patents
Sensor for measuring thickness of oxide film on inner wall of control rod guide tube Download PDFInfo
- Publication number
- CN117704947A CN117704947A CN202311498169.XA CN202311498169A CN117704947A CN 117704947 A CN117704947 A CN 117704947A CN 202311498169 A CN202311498169 A CN 202311498169A CN 117704947 A CN117704947 A CN 117704947A
- Authority
- CN
- China
- Prior art keywords
- coil
- main body
- wall
- guide tube
- oxide film
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 52
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 239000000446 fuel Substances 0.000 description 6
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention relates to a sensor for measuring the thickness of oxide film on the inner wall of a control rod guide tube, which comprises a main body framework and a plurality of coil frameworks, wherein a central hole is formed in the main body framework, the central line of the central hole is consistent with the axial line of the main body framework, and a reference coil is arranged in the main body framework; the periphery circumference setting of a plurality of coil framves around main part skeleton, and the periphery wall of coil skeleton is at least partly salient in the periphery wall of main part skeleton, has seted up a plurality of holding tanks on the one side of coil skeleton towards main part skeleton, and a plurality of holding tanks distribute in proper order along the axial of main part skeleton, and the holding tank link up with the centre bore, is provided with the detection component in the holding tank, and the detection component is connected with reference coil. According to the sensor provided by the invention, the plurality of coil frameworks are arranged, the plurality of coil frameworks are circumferentially arranged around the periphery of the main body framework, the detection assembly is arranged in each coil framework, and the thickness of oxide films at a plurality of positions in one circle with the same height of the guide tube can be detected during one scanning, so that the detection efficiency is greatly improved.
Description
Technical Field
The invention relates to a sensor for measuring the thickness of oxide film on the inner wall of a control rod guide tube.
Background
Most domestic pressurized water reactor nuclear power plants use AFA-3G fuel assemblies, and guide pipes are important components of the nuclear fuel assemblies. Each fuel assembly is provided with 24 control rod guide pipes which provide guide channels for the insertion and the extraction of control rods, and the guide pipes are used for adjusting the power of the reactor in normal operation, and rapidly introducing negative reactivity under accident working conditions, so that the reactor is in emergency shutdown, and nuclear safety is ensured. Therefore, it is important to keep the interior of the guide tube clean and tidy and smooth. However, the guide pipe is in high temperature, high pressure and strong radiation environment for a long time, the inner surface of the guide pipe is easy to generate oxidation phenomenon, and the control rod is prevented from being inserted and pulled out when serious, so that the safe operation of the reactor is influenced. Therefore, the thickness measurement of the oxide film on the inner wall of the guide tube after irradiation has important significance in ensuring the safe operation of the fuel assembly.
At present, no related inspection for measuring the thickness of the oxide film on the inner wall of the guide tube of the control rod is available at home. In recent years, with the localization of fuel assemblies, it is necessary to know whether the working conditions and the expected conditions of each component of the fuel assemblies are consistent or whether the safety operation is affected by the generated changes in the in-service inspection environment for the purpose of nuclear safety. Furthermore, as the service life of older fuel assemblies increases, the measurement of the thickness of oxide film on the inner wall of the control rod guide tube becomes increasingly necessary and important.
Referring to fig. 14, the control rod guide tube 13 includes a first non-buffer segment 131, a first transition segment 132, a buffer segment 133, a second transition segment 134, and a second non-buffer segment 135 sequentially distributed along an axial direction thereof, the first non-buffer segment 131 and the second non-buffer segment 135 have inner diameters identical, the inner diameter of the first transition segment 132 gradually decreases, e.g., tapers, from the first non-buffer segment 131 to the buffer segment 133, the inner diameter of the second transition segment 134 gradually decreases, e.g., tapers, from the second non-buffer segment 135 to the buffer segment 133, the inner diameter of the buffer segment 133 is the smallest, the portion of the lower end of the existing guide tube between the first and second lattices is the buffer segment, the diameter is reduced, and the tube is expanded to a normal tube diameter below the buffer segment at the height of the underlying spacer lattice. Conventional fixed probes with the same diameter are difficult to penetrate through the whole guide tube, and the thickness of the oxide film of the whole guide tube is difficult to detect.
Disclosure of Invention
The invention aims to provide a sensor for measuring the thickness of oxide films on the inner wall of a control rod guide tube.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the sensor for measuring the oxide film thickness of the inner wall of the control rod guide tube comprises a main body framework and a plurality of coil frameworks, wherein a central hole is formed in the main body framework, the central line of the central hole is consistent with the axial line of the main body framework, and a reference coil is arranged in the main body framework;
a plurality of coil skeleton around the periphery circumference setting of main part skeleton, coil skeleton orientation one side of main part skeleton on seted up a plurality of holding tanks, a plurality of the holding tank follow the axial of main part skeleton distribute in proper order, coil skeleton set up the periphery wall protrusion of holding tank in the periphery wall of main part skeleton, the holding tank with the centre bore link up, the holding tank in be provided with detection component, detection component with reference coil connect.
According to some embodiments of the invention, the sensor further comprises an elastic member, one end of the elastic member abuts against the coil skeleton, and the other end of the elastic member abuts against the main body skeleton.
According to some embodiments of the invention, the detecting assembly comprises a detecting coil, a first bushing and a second bushing, wherein the detecting coil is connected with the reference coil, the detecting coil is positioned in the first bushing, the second bushing is sleeved outside the first bushing, the first bushing is made of plastic material, and the second bushing is made of metal material.
According to some embodiments of the invention, the outer peripheral wall of the coil frame away from the main body frame is in a convex arc shape.
According to some embodiments of the invention, the coil skeleton comprises a first section, a second section and a third section which are sequentially connected, wherein the first section, the second section and the third section are sequentially distributed along the axial direction of the main body skeleton, the peripheral wall of the second section protrudes out of the peripheral walls of the first section and the second section, and the second section is provided with the accommodating groove.
According to some embodiments of the invention, the sensor further comprises a first guide member and a second guide member, the main body frame has a first end and a second end opposite to each other, the first guide member is disposed at the first end of the main body frame, the second guide member is disposed at the second end of the main body frame, and the coil frame is disposed between the first guide member and the second guide member.
According to some embodiments of the invention, the first guide member and the second guide member each comprise a top surface and an annular side surface perpendicular to the top surface, the top surface is connected with the annular side surface and surrounds the annular side surface to form an accommodating space with an opening, and the annular side surfaces of the first guide member and the second guide member are respectively in threaded connection with the first end and the second end of the main body framework.
According to some embodiments of the invention, when the first guide member and the second guide member are respectively disposed at the first end and the second end of the main body frame, the first end and the second end of the coil frame respectively abut against the inner walls of the annular sides of the first guide member and the second guide member to limit the coil frame from being separated from the main body frame.
According to some embodiments of the present invention, the outer circumference of the main body skeleton is provided with a plurality of mounting grooves recessed toward the center thereof along the circumferential direction, the mounting grooves are provided with openings penetrating through the center holes, the coil skeleton is arranged in the mounting grooves, the outer circumferential wall of the coil skeleton away from the main body skeleton is positioned outside the mounting grooves, and the accommodating grooves are penetrated through the openings; one end of the main body framework is provided with a slot, the slot is communicated with the central hole, and the slot is used for accommodating the reference coil.
According to some embodiments of the invention, one side of the coil frame facing the main body frame is provided with three accommodating grooves.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the sensor for measuring the oxide film thickness of the inner wall of the control rod guide tube is provided with the plurality of coil frameworks, the plurality of coil frameworks are circumferentially arranged around the periphery of the main body framework, and each coil framework is internally provided with the detection assembly, which is equivalent to the arrangement of a plurality of detection points, so that the oxide film thickness of a plurality of positions in a circle with the same height of the guide tube can be detected during one scanning, the detection efficiency is greatly improved, and the reference significance is also realized while the detection efficiency is improved.
Drawings
FIG. 1 is an overall structure diagram of a first view angle of a sensor for measuring oxide film thickness of an inner wall of a control rod guide tube, which is provided by the invention;
FIG. 2 is an overall structure diagram of a second view angle of the sensor for measuring the thickness of oxide film on the inner wall of a control rod guide tube;
FIG. 3 is a front cross-sectional view of a sensor for measuring oxide film thickness on the inner wall of a control rod guide tube according to the present invention;
FIG. 4 is a top cross-sectional view of a sensor for measuring oxide film thickness on the inner wall of a control rod guide tube according to the present invention;
FIG. 5 is a block diagram of a first view angle of a main body skeleton of the sensor for measuring the thickness of oxide film on the inner wall of a control rod guide tube;
FIG. 6 is a block diagram of a second view angle of a main body skeleton of the sensor for measuring the thickness of oxide film on the inner wall of a control rod guide tube according to the present invention;
FIG. 7 is a block diagram of a third view angle of a main body skeleton of the sensor for measuring the thickness of oxide film on the inner wall of a control rod guide tube according to the present invention;
FIG. 8 is a top view of the main body skeleton of the sensor for measuring the thickness of oxide film on the inner wall of a control rod guide tube provided by the invention;
FIG. 9 is an exploded view of a first view of three coil bobbins of the sensor for measuring oxide film thickness of the inner wall of a control rod guide tube according to the present invention;
FIG. 10 is an exploded view of a second view of three coil bobbins of the sensor for measuring oxide film thickness of the inner wall of a control rod guide tube according to the present invention;
FIG. 11 is a block diagram of a first view angle of a coil former of the sensor for measuring oxide film thickness of an inner wall of a control rod guide tube according to the present invention;
FIG. 12 is a block diagram of a second view of a coil former of a sensor for controlling oxide film thickness measurement on an inner wall of a rod guide tube according to the present invention;
FIG. 13 is a block diagram of a third view angle of a coil former of the sensor for measuring oxide film thickness of an inner wall of a control rod guide tube according to the present invention;
fig. 14 is a front view of the control rod guide tube.
In the above figures:
1-a first guide; 2-main body framework, 21-mounting groove, 22-grooving, 23-groove and 24-opening;
3-coil frameworks, 31-first sections, 32-second sections, 33-third sections and 34-accommodating grooves;
4-a second bushing; 5-a first detection coil; 6-a first bushing; 7-a second detection coil; 8-an elastic member; 9-a third detection coil; 10-a second guide; 11-a reference coil; 12-reference piece;
13-guiding tube, 131-first non-buffer section, 132-first transition section, 133-buffer section, 134-second transition section, 135-second non-buffer section.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to the sensor for measuring the oxide film thickness of the inner wall of the control rod guide tube 13 shown in fig. 1 to 13, the sensor comprises a main body framework 2 and a plurality of coil frameworks 3, wherein the main body framework 2 is of a hollow cylindrical structure, namely, a central hole is formed in the main body framework 2, the central line of the central hole is consistent with the axial line of the main body framework 2, a slot 22 is formed in one end of the main body framework 2, the slot 22 is used for accommodating a reference coil 11 and a reference sheet 12, the material of the reference sheet 12 is consistent with that of the guide tube, and the reference sheet 12 is tightly attached to the reference coil 11, so that signals can be balanced better.
The outer periphery of the main body frame 2 is provided with a plurality of mounting grooves 21 which are recessed toward the center along the circumferential direction, and the mounting grooves 21 are provided with openings 24 which are communicated with the center hole. The plurality of coil frameworks 3 are circumferentially arranged around the periphery of the main body framework 2, the coil frameworks 3 are arranged in the mounting grooves 21, the peripheral wall of each coil framework 3 at least partially protrudes out of the peripheral wall of the main body framework 2, namely, the peripheral wall of each coil framework 3 far away from the main body framework 2 is positioned outside the mounting grooves 21, and the peripheral wall of each coil framework 3 is provided with the containing groove 34 protruding out of the peripheral wall of the main body framework; a plurality of holding grooves 34 are formed in one side, facing the main body framework 2, of the coil framework 3, the holding grooves 34 are sequentially distributed along the axial direction of the main body framework 2, the holding grooves 34 are communicated with the holes 24 of the main body framework 2, detection components are arranged in the holding grooves 34, and the detection components are connected with the reference coil 11.
When the sensor of this example is used for stretching into the control rod guide tube to detect the thickness of the oxide film on the inner wall of the control rod guide tube, the periphery of the coil frameworks 3 is attached to the inner wall of the guide tube, and the plurality of coil frameworks 3 are circumferentially arranged around the periphery of the main body framework 2, which is equivalent to a plurality of detection points, so that the thickness of the oxide film on a plurality of positions in the same height of the guide tube in one circle can be detected during one scanning, and the detection efficiency is greatly improved.
Referring to the drawing, the detection component includes detection coil, first bush 6, second bush 4, and detection coil is located first bush 6, and outside first bush 6 was established to the 4 cover of second bush, first bush 6 was made by plastic material, like nylon, and second bush 4 is made by metal material, sets up the advantage of first bush 6 and is: the detection coil is protected from being influenced by the stainless steel sleeve, and meanwhile, the coil inductance is enhanced.
In one embodiment, the coil skeleton 3 includes a first section 31, a second section 32, and a third section 33 sequentially connected, where the first section 31, the second section 32, and the third section 33 are sequentially distributed along the axial direction of the main body skeleton 2, and the peripheral wall of the second section 32 protrudes from the peripheral walls of the first section 31 and the second section 32, that is, the thickness of the second section 32 is greater than that of the first section 31 and the second section 32, and the second section 32 is provided with a containing groove 34 for containing a detection component, and when detecting a guide tube, the second section 32 can correspond to a transition section of the guide tube, so that the transition section can be better detected.
Referring to fig. 1-2, the sensor further comprises a first guide member 1 and a second guide member 10, the main body framework 2 is provided with a first end and a second end which are opposite, the first guide member 1 is arranged at the first end of the main body framework 2, the second guide member 10 is arranged at the second end of the main body framework 2, the coil framework 3 is positioned between the first guide member 1 and the second guide member 10, and the first guide member 1 and the second guide member 10 are arranged to play a guiding role for smooth advancing and retreating of the sensor in the guide tube; the first guide member 1 and the second guide member 10 are made of plastic, preferably nylon.
Referring to fig. 1-2, the first guide member 1 and the second guide member 10 each include a top surface and an annular side surface perpendicular to the top surface, the top surface is connected with the annular side surface and surrounds the annular side surface to form an accommodating space with an opening, threads are arranged at the inner part of the annular side surface, threads are arranged at the outer parts of the first end and the second end of the main body framework 2, and the annular side surfaces of the first guide member 1 and the second guide member 10 are respectively in threaded connection with the first end and the second end of the main body framework 2, so that the installation and the disassembly are convenient.
Referring to fig. 3, when the bobbin 3 is disposed in the mounting groove 21 of the main body bobbin 2, one ends of the annular side surfaces of the first and second guide members 1 and 10 extend above opposite ends of the bobbin 3, respectively, that is, a gap is provided between the inner walls of the annular side surfaces of the first and second guide members 1 and 10 and the mounting groove 21 of the main body bobbin 2, and the annular side surfaces of the first and second guide members 1 and 10 may abut against opposite ends of the bobbin 3 to limit the bobbin 3 from being separated from the mounting groove 21 of the main body bobbin 2, so that the bobbin 3 is positionally fixed on the main body bobbin 2.
In this example, the outer peripheral wall of the coil skeleton 3 far away from the main body skeleton 2 is in a convex arc shape, so that the inner wall of the guide tube can be better attached.
In this example, the number of the detection coils in one coil skeleton 3 is equal to the number of the reference coils 11, in a preferred embodiment, the number of the coil skeletons 3 is three, the number of the reference coils 11 is three, and three accommodating grooves 34 are formed in one side, facing the main body skeleton 2, of each coil skeleton 3, so that the thickness of the oxide film at 3 points, 120 DEG apart from the same height of the guide tube, can be detected by one scanning. In this arrangement, the three accommodating grooves 34 formed in the side of the coil frame 3 facing the main body frame 2 are respectively provided with a first detection coil 5, a second detection coil 7 and a third detection coil 9, the first detection coil 5, the second detection coil 7 and the third detection coil 9 in one coil frame 3 are sequentially distributed along the axial direction of the main body frame 2, the first detection coils 5 of the three coil frames 3 are arranged along one circle, the second detection coils 7 of the three coil frames 3 are arranged along the other circle, and the third detection coils 9 of the three coil frames 3 are arranged along the other circle; when the detection coil is connected with the reference coil 11: the three first detection coils 5 in the three bobbins 3 at one turn of the main body bobbin 2 are connected to one reference coil 11, the three second detection coils 7 in the three bobbins 3 at the other turn of the main body bobbin 2 are connected to the other reference coil 11, and the three third detection coils 9 in the three bobbins 3 at the other turn of the main body bobbin 2 are connected to the other reference coil 11. When the guide tube is detected, the first detection coil 5 and the third detection coil 9 are respectively matched with the first transition section 132 and the second transition section 134 of the guide tube, so that the detection precision of the oxide film thickness of the transition sections is ensured; the second detection coil 7 is engaged with the guide tube buffer section 133, and the bobbin 3 corresponding to the second detection coil 7 elastically contacts the inner surface of the guide tube buffer section 133.
The sensor further comprises an elastic piece 8, one end of the elastic piece 8 is propped against the coil framework 3, the other end of the elastic piece 8 is propped against the bottom of the mounting groove 21 of the main body framework 2, and the elastic piece 8 is arranged, so that the periphery of the coil framework 3 is elastically attached to the inner wall of the guide tube, and the detection is more accurate. Referring to fig. 12, a receiving groove 34 located in the middle of the coil frame 3 has a larger diameter, the detecting coil is located in the receiving groove 34, one end of the elastic member 8 is located in the receiving groove 34, a groove 23 is formed in the corresponding main body frame 2, and the other end of the elastic member 8 is located in the groove 23.
The sensor for measuring the oxide film thickness of the inner wall of the control rod guide tube is provided with the plurality of coil frameworks, the plurality of coil frameworks are circumferentially arranged around the periphery of the main body framework, and each coil framework is internally provided with the detection assembly, which is equivalent to the arrangement of a plurality of detection points, so that the oxide film thickness of a plurality of positions in a circle with the same height of the guide tube can be detected during one scanning, the detection efficiency is greatly improved, and the reference significance is also realized while the detection efficiency is improved.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (10)
1. The sensor for measuring the thickness of the oxide film on the inner wall of the control rod guide tube is characterized by comprising a main body framework and a plurality of coil frameworks, wherein a central hole is formed in the main body framework, the central line of the central hole is consistent with the axial line of the main body framework, and a reference coil is arranged in the main body framework;
a plurality of coil skeleton around the periphery circumference setting of main part skeleton, coil skeleton orientation one side of main part skeleton on seted up a plurality of holding tanks, a plurality of the holding tank follow the axial of main part skeleton distribute in proper order, coil skeleton set up the periphery wall protrusion of holding tank in the periphery wall of main part skeleton, the holding tank with the centre bore link up, the holding tank in be provided with detection component, detection component with reference coil connect.
2. The sensor for measuring the thickness of an oxide film on the inner wall of a guide tube of a control rod according to claim 1, further comprising an elastic member, wherein one end of the elastic member abuts against the coil frame, and the other end of the elastic member abuts against the main body frame.
3. The sensor for measuring the thickness of the oxide film on the inner wall of the guide tube of the control rod according to claim 1, wherein the detection assembly comprises a detection coil, a first bushing and a second bushing, the detection coil is connected with the reference coil, the detection coil is positioned in the first bushing, the second bushing is sleeved outside the first bushing, the first bushing is made of a plastic material, and the second bushing is made of a metal material.
4. The sensor for measuring the thickness of oxide film on the inner wall of a guide tube of a control rod according to claim 1, wherein the outer peripheral wall of the coil frame, which is far from the main body frame, is in a convex arc shape.
5. The sensor for measuring the thickness of the oxide film on the inner wall of the control rod guide tube according to claim 1, wherein the coil framework comprises a first section, a second section and a third section which are sequentially connected, the first section, the second section and the third section are sequentially distributed along the axial direction of the main framework, the peripheral wall of the second section protrudes out of the peripheral walls of the first section and the second section, and the second section is provided with the accommodating groove.
6. The sensor for measuring the thickness of an oxide film on the inner wall of a guide tube of a control rod of claim 5, further comprising a first guide member and a second guide member, wherein the main body frame has a first end and a second end opposite to each other, the first guide member is disposed at the first end of the main body frame, the second guide member is disposed at the second end of the main body frame, and the coil frame is disposed between the first guide member and the second guide member.
7. The sensor for measuring the thickness of oxide film on the inner wall of a guide tube of a control rod according to claim 6, wherein the first guide member and the second guide member each comprise a top surface and an annular side surface perpendicular to the top surface, the top surface is connected with the annular side surface and surrounds the annular side surface to form an accommodating space with an opening, and the annular side surfaces of the first guide member and the second guide member are respectively in threaded connection with the first end and the second end of the main body framework.
8. The sensor for measuring the thickness of oxide film on the inner wall of a guide tube of a control rod according to claim 6, wherein when the first guide member and the second guide member are respectively arranged at the first end and the second end of the main body frame, the first end and the second end of the coil frame respectively abut against the inner walls of annular side surfaces of the first guide member and the second guide member to limit the coil frame from being separated from the main body frame.
9. The sensor for measuring the thickness of the oxide film on the inner wall of the guide tube of the control rod according to claim 1, wherein a plurality of mounting grooves which are recessed towards the center of the outer periphery of the main body framework are formed in the circumferential direction of the main body framework, the mounting grooves are provided with holes which are communicated with the center holes, the coil framework is arranged in the mounting grooves, the outer peripheral wall of the coil framework far away from the main body framework is positioned outside the mounting grooves, and the containing grooves are communicated with the holes;
one end of the main body framework is provided with a slot, the slot is communicated with the central hole, and the slot is used for accommodating the reference coil.
10. The sensor for measuring the thickness of oxide film on the inner wall of a guide tube of a control rod according to claim 1, wherein three receiving grooves are formed in one side of the coil frame facing the main body frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311498169.XA CN117704947A (en) | 2023-11-10 | 2023-11-10 | Sensor for measuring thickness of oxide film on inner wall of control rod guide tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311498169.XA CN117704947A (en) | 2023-11-10 | 2023-11-10 | Sensor for measuring thickness of oxide film on inner wall of control rod guide tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117704947A true CN117704947A (en) | 2024-03-15 |
Family
ID=90159643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311498169.XA Pending CN117704947A (en) | 2023-11-10 | 2023-11-10 | Sensor for measuring thickness of oxide film on inner wall of control rod guide tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117704947A (en) |
-
2023
- 2023-11-10 CN CN202311498169.XA patent/CN117704947A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20080137799A1 (en) | Nuclear fuel assembly | |
| US7515674B2 (en) | Tube-in-tube threaded dashpot end plug | |
| US7412021B2 (en) | Advanced gray rod control assembly | |
| JP3443587B2 (en) | Control rod drive device and method of assembling the same | |
| US4990304A (en) | Instrumentation tube features for reduction of coolant flow-induced vibration of flux thimble tube | |
| US8811566B2 (en) | Guide thimble plug for nuclear fuel assembly | |
| US9991009B2 (en) | Electrical feedthroughs for nuclear reactor | |
| RU2009119170A (en) | RETAINING NODE FOR NUCLEAR REACTOR ACTIVE ZONE COMPONENTS | |
| KR940003793B1 (en) | Reusable locking tube in a reconstitutable fuel assembly | |
| CN117704947A (en) | Sensor for measuring thickness of oxide film on inner wall of control rod guide tube | |
| JPS62192697A (en) | Extension device for simple guide | |
| US9208904B2 (en) | Reinforcement for a nuclear fuel assembly | |
| US9053824B2 (en) | Nuclear control rod with flexure joint | |
| KR101640942B1 (en) | Nuclear reactor fuel assembly | |
| KR20080111409A (en) | Nuclear reactor fuel assembly grid | |
| US20090052607A1 (en) | Spacer Grid for Close-Spaced Nuclear Fuel Rods | |
| KR20080060791A (en) | Top nozzle assembly having volute spring in nuclear fuel assembly | |
| US20200043617A1 (en) | Control rod guide assembly with enhanced stiffness, fuel assembly including the same, and method of installing control rod guide assembly | |
| US20170337993A1 (en) | Fuel Assembly | |
| JP2015197413A (en) | control rod position detection device | |
| CN112837835A (en) | Probe protection device and high-temperature fission chamber with same | |
| KR102059464B1 (en) | Lock insert for top nozzle assembly the same, engaging·releasing system for top nozzle having it | |
| US9718166B2 (en) | Water jet peening apparatus and method, and method of evaluating nozzle | |
| KR930005578B1 (en) | Individual source positioning mechanism for a nuclear reactor fuel assembly | |
| KR830001692B1 (en) | Guide tube fixture of reactor fuel assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |