CN110060790A - Nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure - Google Patents
Nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure Download PDFInfo
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- CN110060790A CN110060790A CN201910306536.9A CN201910306536A CN110060790A CN 110060790 A CN110060790 A CN 110060790A CN 201910306536 A CN201910306536 A CN 201910306536A CN 110060790 A CN110060790 A CN 110060790A
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- 238000003466 welding Methods 0.000 title claims abstract description 146
- 230000007547 defect Effects 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000007246 mechanism Effects 0.000 title claims abstract description 24
- 238000005253 cladding Methods 0.000 claims abstract description 42
- 238000012545 processing Methods 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims description 7
- 238000011161 development Methods 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000002950 deficient Effects 0.000 abstract description 4
- 238000009418 renovation Methods 0.000 abstract description 4
- 238000005067 remediation Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 239000011324 bead Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002180 anti-stress Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/20—Arrangements for introducing objects into the pressure vessel; Arrangements for handling objects within the pressure vessel; Arrangements for removing objects from the pressure vessel
- G21C19/207—Assembling, maintenance or repair of reactor components
-
- 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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention relates to a kind of nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedures, its step includes: to provide first shell and second shell, first shell includes the first noumenon and the first lip set on the first noumenon, second shell includes the second ontology and the second lip set on the second ontology, and the first lip is connected with the second lip by omega welding seam；Detecting omega welding seam whether there is weld defect；And when omega welding seam is there are when weld defect, built-up welding processing is carried out to omega welding seam, to form the overlay cladding of covering omega welding seam in the outer surface of the first lip and the outer surface of the second lip.Restorative procedure of the present invention simplifies the renovation technique of omega welding seam, improves the remediation efficiency of omega welding seam without removal in advance with defective omega welding seam.
Description
Technical field
The present invention relates to nuclear power station construction and installation fields, more particularly to a kind of nuclear power station control rod drive mechanism pneumatic shell
Omega welding seam defect restorative procedure.
Background technique
Control rod drive mechanism (Control Rod Drive Mechanism, abbreviation CRDM) is that one kind is installed on reaction
Vertical direction stepwise magnetic force lifting device on core pressure vessel top cover tube socket.As important the setting for executing reactivity control
It is standby, it can according to instruction drive C&P systems move up and down within the scope of reactor core, be maintained at command altitude or power-off release stick when
Control rod is set to be inserted into reactor core under the effect of gravity, to reach control reactor start-up, power regulation and shutdown function.CRDM
In the safety curtain that contains as the primary Ioops pressure boundary contacted with coolant and radioactivity of pneumatic shell, CRDM pressure resistance
Shell is by three Duan Zucheng, respectively end plug, stick stroke casing and hook shell from top to bottom, at the interconnection between each section by
It is threadedly coupled and is sealed by omega welding seam.
Since omega welding seam is thin-walled weld seam, during Nuclear Power Station and operation, omega welding seam region is easily due to weld defect
The risk of damaged leakage occurs.However, there is no perfect renovation techniques at present to repair in-service CRDM pneumatic shell omega welding seam institute
The weld defect of generation.
Summary of the invention
Based on this, it is necessary to for there is no perfect renovation techniques at present to repair in-service CRDM pneumatic shell omega welding seam institute
The problem of weld defect of generation, provides a kind of nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure.
A kind of nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure, comprising:
There is provided first shell and second shell, the first shell includes the first noumenon and set on the first noumenon
First lip, the second shell include the second ontology and the second lip set on second ontology, first lip
It is connected with second lip by omega welding seam；
The omega welding seam is detected with the presence or absence of weld defect；And
When the omega welding seam is there are when weld defect, built-up welding processing is carried out to the omega welding seam, in first lip
Outer surface and the outer surface of second lip form the overlay cladding for covering the omega welding seam.
The quantity of the overlay cladding is at least two layers in one of the embodiments,；And/or the thickness of the overlay cladding is extremely
It is less 4.064mm.
The overlay cladding extends to the first noumenon, the heap by first lip in one of the embodiments,
Layer extends to second ontology by second lip.
The overlay cladding is by first lip towards the development length of the first noumenon in one of the embodiments,
At least 2.72mm, the overlay cladding are at least 2.72mm by the development length of second lip towards second ontology.
The outer surface of the overlay cladding and the outer surface of the first noumenon use round and smooth mistake in one of the embodiments,
It crosses, the outer surface of the outer surface of the overlay cladding and second ontology uses rounding off.
The outer surface of the overlay cladding and the outer surface intersection point of the first noumenon are cut in one of the embodiments,
Face, the angle with the outer surface of the first noumenon are at most 45 °；The outer surface of the overlay cladding is outer with second ontology
The section of surface intersection point, the angle with the outer surface of second ontology are at most 45 °.
Described the step of built-up welding processing is carried out to the omega welding seam in one of the embodiments, specifically:
Built-up welding processing is carried out to the omega welding seam with weld defect using nickel-base alloy.
In one of the embodiments, described the step of built-up welding processing is carried out to the omega welding seam, specifically include:
Build-up welding apparatus is provided and controller, the build-up welding apparatus are connect with the controller, the build-up welding apparatus is set to
Initial position, so that the welding gun of the build-up welding apparatus is directed at the omega welding seam region, the controller transmission is executed instruction
In the build-up welding apparatus, so that the build-up welding apparatus carries out built-up welding processing to the omega welding seam.
The first shell is end plug in one of the embodiments, and the second shell is stick stroke casing；Alternatively,
The first shell is stick stroke casing, and the second shell is hook shell；Alternatively, the first shell is hook shell,
The second shell is pressure vessels top cover tube socket.
In one of the embodiments, when the first shell is stick stroke casing, the second shell is hook shell
When, it is formed with filling slot between first lip and the first noumenon, built-up welding processing is carried out to the omega welding seam described
The step of after, the nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure further includes following steps:
Deposited metal is filled in the filling slot, to form the deposition connecting with the first noumenon and the overlay cladding
Metal layer.
In above-mentioned nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure, when the omega welding seam detected
There are when weld defect, by carrying out built-up welding processing to omega welding seam, can the first lip outer surface and the second lip it is outer
Surface forms overlay cladding of the covering with defective omega welding seam, and it is normal that the number of plies of overlay cladding should meet in-service control rod drive mechanism
The strength demand of operation, above-mentioned restorative procedure simplify the reparation work of omega welding seam with defective omega welding seam without removal in advance
Skill improves the remediation efficiency of omega welding seam.
Detailed description of the invention
Fig. 1 is the CRDM pneumatic shell of one embodiment of the invention and the combining structure schematic diagram of pressure vessels top cover tube socket；
Fig. 2 is the structural schematic diagram of Fig. 1 medium rod stroke casing and hook housing junction omega welding seam；
Fig. 3 is the structural schematic diagram of hook shell and the omega welding seam of pressure vessels top cover tube socket junction in Fig. 1；
Fig. 4 is the enlarged diagram for forming overlay cladding at A in Fig. 2；
Fig. 5 is the enlarged diagram for forming overlay cladding at B in Fig. 3；
Fig. 6 is the CRDM pneumatic shell omega welding seam defect restorative procedure flow diagram of one embodiment of the invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case where violating intension of the present invention, therefore the present invention is not limited to the specific embodiments disclosed below.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
Body embodiment purpose, it is not intended that in limitation the present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
As shown in Figure 1, the CRDM has resistance to the present invention provides a kind of nuclear power station control rod drive mechanism (abbreviation CRDM)
Pressure shell 10, the CRDM pneumatic shell 10 include sequentially connected end plug 100, stick stroke casing 200 and hook shell from top to bottom
300, the bottom of hook shell 300 is used to be installed on the tube socket 20 of pressure vessels top cover.Wherein, end plug 100 and stick stroke set
Between pipe 200, between stick stroke casing 200 and hook shell 300 and the tube socket of hook shell 300 and pressure vessels top cover
It is sealed by threaded connection between 20 and by omega welding seam.Therefore, it is formed with Ω at upper, middle and lower three altogether on CRDM pneumatic shell 10
Weld seam.
Illustrate one embodiment of the invention CRDM pneumatic shell omega welding seam defect restorative procedure now in conjunction with Fig. 2 to Fig. 6.The reparation side
Method can be used for domestic CPR1000 nuclear power unit CRDM omega welding seam defect reparation.
Step S810, as shown in Fig. 2, providing first shell 400 and second shell 500.First shell 400 includes first
Body 410 and the first lip 420 set on the first noumenon 410, second shell 500 include the second ontology 510 and are set to second
Second lip 520 of ontology 510.First lip 420 and the second lip 520 are connected by omega welding seam 30.
In one embodiment, with continued reference to FIG. 2, first shell 400 is stick stroke casing 200, second shell 500 is hook
Omega welding seam 30 between pawl shell 300 namely first shell 400 and second shell 500 is the middle part weldering on CRDM pneumatic shell 10
Seam.It is appreciated that in other embodiments, as shown in figure 3, first shell 400 is hook shell 300, second shell 500 is pressure
Omega welding seam 30 between the tube socket 20 namely first shell 400 and second shell 500 of force container top cover is on CRDM pneumatic shell 10
Lower part weld seam.Certainly, (not shown), first shell 400 are end plug 100 in another embodiment, and second shell 500 is stick row
Omega welding seam 30 between journey casing 200 namely first shell 400 and second shell 500 is the top weldering on CRDM pneumatic shell 10
Seam.
Step S820, detection omega welding seam 30 whether there is weld defect.It is resulted from it should be noted that weld defect refers to
The defect of weld metal and its neighbouring heat affected area steel surface or inside.Common weld defect includes crackle, abrasion, gas
Hole, slag inclusion etc..In an embodiment, weld defect whether there is using the method detection omega welding seam 30 of Liquid penetrant testing.Wherein, it seeps
A kind of lossless detection method of inspection Surface-breaking defect based on detection is the principle by capillarity thoroughly.
Step S840, as shown in Figure 4 and Figure 5, when omega welding seam 30 detected is there are when weld defect, to omega welding seam 30 into
Row built-up welding processing, to form covering omega welding seam 30 in the outer surface 421 of the first lip 420 and the outer surface 521 of the second lip 520
Overlay cladding 600, weld deposit process material therefor can be nickel-base alloy, due to nickel-base alloy have excellent anti-stress corrosiveness
Can, so as to improve the intensity with 30 region of defect omega welding seam.In one embodiment, the number of plies of overlay cladding 600 is at least two
Layer, the thickness of overlay cladding 600 are at least 4.064mm.It should be noted that the specific number of plies of overlay cladding 600 and thickness are herein not
It is limited in any way, as long as can satisfy the knot needed for in-service equipment operates normally by the design of 600 number of plies of overlay cladding and thickness
Structure intensity.
In one embodiment, overlay cladding 600 is extended to the outer surface 411 of the first noumenon 410, built-up welding by the first lip 420
Layer 600 is extended to the outer surface 511 of the second ontology 510 by the second lip 520.In one embodiment, overlay cladding 600 is by the first lip
Development length of the side 420 on the first noumenon 410 is at least 2.72mm, and overlay cladding 600 is by the second lip 520 in the second ontology
Development length on 510 is at least 2.72mm.In one embodiment, the outer surface 610 of overlay cladding 600 and the first noumenon 410
Outer surface 411 and the outer surface 511 of the second ontology 510 are all made of rounding off.In one embodiment, the appearance of overlay cladding 600
The section of 411 intersection point of outer surface of face 610 and the first noumenon 410, the angle with the outer surface 411 of the first noumenon 410 are at most
45°.The section of 511 intersection point of outer surface of the outer surface 610 of overlay cladding 600 and the second ontology 510, it is outer with the second ontology 510
The angle on surface 511 is at most 45 °.
In one embodiment, the step of carrying out built-up welding processing to omega welding seam namely step S830, specifically include:
The controller that build-up welding apparatus is provided and is connect with build-up welding apparatus.Build-up welding apparatus is set to initial position, so that heap
The welding gun of welder is directed at 30 region of omega welding seam, and controller transmission is executed instruction in build-up welding apparatus, so that build-up welding apparatus pair
Omega welding seam 30 carries out built-up welding processing.Wherein, build-up welding apparatus can be fixed on CRDM pneumatic shell 10, and build-up welding apparatus is in controller
Control is lower can to move along the planned orbit in the circumferential direction of pneumatic shell 10, every time along circumferential direction on planned orbit move
Dynamic, build-up welding apparatus completes the distribution of at least one welding bead to 30 region of omega welding seam, and every layer of welding bead is a whole circle deposition.Built-up welding
Device by repeatedly along circumferential direction on planned orbit it is mobile, to form overlay cladding 600.
In one embodiment, before the step of carrying out built-up welding processing to omega welding seam 30, namely before step S840,
CRDM pneumatic shell omega welding seam defect restorative procedure further includes needing step:
Step S830 carries out preparation before built-up welding according to actual needs.For example, clearing up welding region and week before built-up welding
Greasy dirt, corrosion, water and the other objectionable impurities within the scope of 20mm are enclosed, to guarantee welding quality.
In one embodiment, as shown in figure 4, when first shell 400 is stick stroke casing 200, second shell 500 is hook
When shell 300, it is formed with filling slot 401 between the first lip 420 and the first noumenon 410, is carried out at built-up welding to omega welding seam 30
After the step of reason namely after step S840, CRDM pneumatic shell omega welding seam defect restorative procedure further includes following steps:
Step S850 fills deposited metal in filling slot 401, outer with the first noumenon 410 and overlay cladding 600 to be formed
The deposited metal layer 700 that surface 610 connects.In this way, it is strong to further increase the structure with 30 region of defect omega welding seam
Degree, to guarantee and improve the safety and reliability of in-service equipment operation.
In above-mentioned nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure, when the omega welding seam detected
30 there are when weld defect, can be in the outer surface 421 of the first lip 420 and the by carrying out built-up welding processing to omega welding seam 30
The outer surface 521 of two lips 520, which is formed, covers the overlay cladding 600 with defective omega welding seam 30, without removal in advance with scarce
Sunken omega welding seam 30, simplifies the renovation technique of omega welding seam 30, improves the remediation efficiency of omega welding seam 30.In addition, build-up welding apparatus
It is installed in the working space of heap top, controller can be installed on remote operation platform, and controller can pass through build-up welding apparatus pair
30 defect region of omega welding seam realize remote auto control, thus guarantee operator distance reprocess CRDM pneumatic shell 20m with
It is outer to be operated, ensure the safety of the operation process of operator.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure, step include:
There is provided first shell and second shell, the first shell includes the first noumenon and set on the first of the first noumenon
Lip, the second shell include the second ontology and the second lip set on second ontology, first lip and institute
The second lip is stated to connect by omega welding seam；
The omega welding seam is detected with the presence or absence of weld defect；And
When the omega welding seam is there are when weld defect, built-up welding processing is carried out to the omega welding seam, in the outer of first lip
Surface and the outer surface of second lip form the overlay cladding for covering the omega welding seam.
2. nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure according to claim 1, feature
It is, the quantity of the overlay cladding is at least two layers；And/or the thickness of the overlay cladding is at least 4.064mm.
3. nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure according to claim 1, feature
It is, the overlay cladding extends to the first noumenon by first lip, and the overlay cladding is extended by second lip
To second ontology.
4. nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure according to claim 3, feature
It is, the overlay cladding is at least 2.72mm, the overlay cladding in the development length of the first noumenon by first lip
Development length by second lip in second ontology is at least 2.72mm.
5. nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure according to claim 1, feature
It is, the outer surface of the outer surface of the overlay cladding and the first noumenon uses rounding off, the outer surface of the overlay cladding
Rounding off is used with the outer surface of second ontology.
6. nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure according to claim 5, feature
It is, the section of the outer surface intersection point of the outer surface of the overlay cladding and the first noumenon, the appearance with the first noumenon
The angle in face is at most 45 °；The section of the outer surface intersection point of the outer surface of the overlay cladding and second ontology, with described the
The angle of the outer surface of two ontologies is at most 45 °.
7. nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure according to claim 1, feature
It is, described the step of built-up welding processing is carried out to the omega welding seam, specifically:
Built-up welding processing is carried out to the omega welding seam with weld defect using nickel-base alloy.
8. nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure according to claim 1, feature
It is, described the step of built-up welding processing is carried out to the omega welding seam, specifically includes:
Build-up welding apparatus is provided and controller, the build-up welding apparatus are connect with the controller, the build-up welding apparatus is set to initial
Position, so that the welding gun of the build-up welding apparatus is directed at the omega welding seam region, the controller transmission is executed instruction in institute
Build-up welding apparatus is stated, so that the build-up welding apparatus carries out built-up welding processing to the omega welding seam.
9. nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect as claimed in any of claims 1 to 8 is repaired
Compound method, which is characterized in that the first shell is end plug, and the second shell is stick stroke casing；Alternatively, the first shell
Body is stick stroke casing, and the second shell is hook shell；Alternatively, the first shell is hook shell, the second shell
Body is pressure vessels top cover tube socket.
10. the nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect reparation according to any one of claim 9
Method, which is characterized in that when the first shell is stick stroke casing, and the second shell is hook shell, described first
It is formed with filling slot between lip and the first noumenon, after described the step of carrying out built-up welding processing to the omega welding seam,
The nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure further includes following steps:
Deposited metal is filled in the filling slot, to form the deposited metal layer connecting with the first noumenon and the overlay cladding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910306536.9A CN110060790A (en) | 2019-04-17 | 2019-04-17 | Nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure |
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| CN201910306536.9A CN110060790A (en) | 2019-04-17 | 2019-04-17 | Nuclear power station control rod drive mechanism pneumatic shell omega welding seam defect restorative procedure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022207624A1 (en) * | 2021-03-31 | 2022-10-06 | Framatome | Method for maintaining a nuclear reactor |
| CN117638333A (en) * | 2024-01-25 | 2024-03-01 | 蜂巢能源科技股份有限公司 | Single battery and preparation method thereof |
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2019
- 2019-04-17 CN CN201910306536.9A patent/CN110060790A/en active Pending
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| 任正秋: "二代改进型核电项目控制棒驱动机构中奥氏体不锈钢Ω型密封焊缝自动TIG焊焊接工艺研究", 《装备机械》 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022207624A1 (en) * | 2021-03-31 | 2022-10-06 | Framatome | Method for maintaining a nuclear reactor |
| FR3121543A1 (en) * | 2021-03-31 | 2022-10-07 | Framatome | Maintenance method of a nuclear reactor |
| CN117638333A (en) * | 2024-01-25 | 2024-03-01 | 蜂巢能源科技股份有限公司 | Single battery and preparation method thereof |
| CN117638333B (en) * | 2024-01-25 | 2024-04-09 | 蜂巢能源科技股份有限公司 | Single battery and preparation method thereof |
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Application publication date: 20190726 |