CN104751914B - Non-destructive inspection circumferential position correction method for thread hole belt of nuclear reactor pressure vessel - Google Patents

Non-destructive inspection circumferential position correction method for thread hole belt of nuclear reactor pressure vessel Download PDF

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Publication number
CN104751914B
CN104751914B CN201310751154.XA CN201310751154A CN104751914B CN 104751914 B CN104751914 B CN 104751914B CN 201310751154 A CN201310751154 A CN 201310751154A CN 104751914 B CN104751914 B CN 104751914B
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China
Prior art keywords
circumferential position
reactor pressure
nuclear reactor
scanning
dolly
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CN201310751154.XA
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CN104751914A (en
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吴东栋
陈姝
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Research Institute of Nuclear Power Operation
China Nuclear Power Operation Technology Corp Ltd
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Research Institute of Nuclear Power Operation
China Nuclear Power Operation Technology Corp Ltd
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    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21CNUCLEAR REACTORS
    • G21C17/00Monitoring; Testing ; Maintaining
    • G21C17/003Remote inspection of vessels, e.g. pressure vessels
    • G21C17/013Inspection vehicles
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear 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)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

The invention belongs to the technical field of automatic ultrasonic non-destructive inspection for a thread hole belt of nuclear reactor pressure vessels, and particularly discloses a non-destructive inspection circumferential position correction method for the thread hole belt of a nuclear reactor pressure vessel. The non-destructive inspection circumferential position correction method comprises the following steps: step 1. setting a plurality of key slots supporting steps on the nuclear reactor pressure vessel to position references; step 2. installing induction components in the key slots set to the position references; step 3. when a non-destructive inspection trolley for the thread hole belt of the nuclear reactor pressure vessel passes through the induction components, providing the real circumferential position of a scanning trolley by the induction components; and step 4. comparing the real circumferential position of the trolley, which is provided by the induction components with a measured circumferential position which is measured during the own movement process of the trolley by the scanning trolley to carry out circumferential position correction. According to the non-destructive inspection circumferential position correction method disclosed by the invention, the errors of inspection for the circumferential movement position of the trolley can be timely eliminated, the scanning inspection accuracy can be improved, potential safety hazards can be timely found, accurate location can be realized, and a support is provided for the subsequent working.

Description

Nuclear reactor pressure container screwed hole band nondestructive inspection (NDI) circumferential position antidote
Technical field
The invention belongs to nuclear reactor pressure container screwed hole band automatic ultrasonic nondestructive inspection (NDI) technical field.
Background technology
Nuclear reactor pressure container screwed hole band is located at container the top, and several bolts hole are uniform-distribution with above, presses In run duration, top cover is detained in its top to force container, and blending bolt nut is fastened.Between bolt hole and Kong Yukong contact bands The quality of material property directly affects the fastening reliability of pressure vessel and top cover, and then affects the safety of pressure vessel Energy.Require according to ARSM, it is desirable to periodically Non-Destructive Testing is carried out to screwed hole band.
Periodically have many kinds to the method that screwed hole band carries out Non-Destructive Testing, one kind therein be using check dolly along Pressure container flange does circumferential movement, and scanography mode carries out circumferential movement to check dolly itself, and it is little to be installed on inspection Two scanning arms of car are radial and axial while stepping, carries out omnibearing scanography.Due to checking dolly circumferential movement Frequently with friction wheel drive, that is, check that dolly is contacted using friction pulley with inspected object.Movement control mode adopts tape terminal The double-closed-loop control of encoder, the encoded radio of terminal encoder is to lean on the encoder wheel contacted with pressure vessel to obtain, encoder Contact quality of the wheel with pressure vessel directly affects terminal encoded radio, and then the inspection dolly for affecting to be obtained during circumferential movement is worked as The precision of front position.Due to the principle of this kind of wheel motion mode, between wheel and inspected object, outside rolling movement, can also Slip is produced, this slip will not be encoded device wheel coding, so as to produce error, also, encoder wheel with scanning step number Increase, this error can be accumulated, and then affect scanning precision.
The content of the invention
The present invention seeks to be directed to the circumferential movement that nuclear reactor pressure container screwed hole checks dolly with automatic ultrasonic, carry For a kind of aligning and cumulative error removing method, to improve scanography precision.
What the present invention was achieved by:
A kind of nuclear reactor pressure container screwed hole band nondestructive inspection (NDI) circumferential position antidote, wherein,
Step 1, multiple keyways of support level on nuclear reactor pressure container are set as into position reference;
Step 2, it is being set as that sensing element is installed inside the keyway of position reference;
Step 3, the lossless scanning dolly of nuclear reactor pressure container screwed hole band pass through the sensing element when, sensing unit Part provides the true circumferential position of scanning dolly;
Step 4, the true circumferential position of dolly and dolly displacement process that the offer of car dolly self induction in future element is provided The measurement circumferential position of middle measurement is compared, and carries out circumferential position correction.
Nuclear reactor pressure container screwed hole band nondestructive inspection (NDI) circumferential position antidote as described above, wherein, described In step 4, if true circumferential position is more than specified threshold with the deviation of measurement circumferential position, using true circumferential position The little truck position of scanning is corrected.
The invention is characterised in that:
1)Make benchmark using 4 keyways of support level on nuclear reactor pressure container
Dolly 3 is checked on pressure vessel 1 during circumferential movement, can by the use of the 4 of upper support level keyways 2 as benchmark, And can pass through the feedback signal of sensing element 4.
2)Differentiated using sensing elements such as proximity switch, limit switch, ultrasonic switches upper in reactor pressure vessel 4 keyways of support step
When checking that dolly 3 is moved near 4 keyways 2 of support level on pressure vessel, sensing element 4 can produce one Individual signal.
3)Every time circumferential movement is demarcated during circumference stepping
During inspection, by equitable subsection, it is ensured that each scanning section at least includes a keyway 2, when inspection dolly 3 passes through key During groove 2, sensing element 4 can feed back a signal and pass to control system, and now circumferential movement is demarcated, it is ensured that every time When checking the walking of dolly 3 to keyway 2, the circumferential coordinate of control system is actual value, it is to avoid the accumulation of circumferential error.
4)Circumferential position is corrected and error cancelling method
Check that dolly 3 can run according to the flow chart shown in Fig. 2, and circumferential position correction and error concealment can be carried out.
It is an advantage of the current invention that the circumferential fortune of dolly is checked with automatic ultrasonic for nuclear reactor pressure container screwed hole Dynamic aligning and cumulative error are eliminated and propose a kind of solution, can in time eliminate the circumferential movement position for checking dolly Error, improve scanography precision, potential safety hazard is found in time, and be accurately positioned, provide support for follow-up work.
Description of the drawings
Fig. 1 nuclear reactor pressure containers screwed hole band automatic ultrasonic checks dolly working state schematic representation.
The correction of Fig. 2 circumferential positions and error cancelling method are applied to the flow chart of whole scanning process.
Wherein, 1, pressure vessel, 2, support level keyway on pressure vessel, 3, check dolly, 4, sensing element.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is described further.
As shown in figure 1, check that dolly is scanned inspection on nuclear reactor pressure container screwed hole band, along reactor Pressure vessel circumferential movement.
Nuclear reactor pressure container screwed hole band nondestructive inspection (NDI) circumferential position antidote of the present invention includes following several Individual step:
Step 1)4 keyways of support level are used as position reference by the use of on nuclear reactor pressure container.
Due to checking dolly 3 when automatic ultrasonic inspection is carried out to pressure vessel screwed hole band, scanning mode is circumferential fortune It is dynamic, two scanning arms it is radial and axial while stepping.Meanwhile, the circumferential movement form of dolly 3 is checked for friction wheel transmission, control Mode adopts the double-closed-loop control of tape terminal encoder, but the motion reality of encoder wheel is also frictional wheel drive, therefore circumferentially There is certain error in motion.With the increase of step number, this error will produce accumulation, and then affect scanning precision.
This patent checks dolly fortune as benchmark, every time by the use of 4 keyways 2 of support level on nuclear reactor pressure container When moving the benchmark, control system can feed back signal, used as the reference of signal processing.
Step 2)Differentiated in reactor pressure vessel using the sensing elements such as proximity switch, limit switch, ultrasonic switch 4 4 keyways of upper support level.
When checking that dolly 3 is moved near 4 keyways 2 of support level on pressure vessel, using proximity switch, spacing Feedback signal is passed to scanning trolley control system differentiating by the sensing elements such as switch, ultrasonic switch 4, obtains scanning dolly True circumferential position.
Step 3)Every time circumferential movement is demarcated during circumference stepping.
During inspection, by equitable subsection, it is ensured that each scanning section at least includes a keyway 2, when inspection dolly 3 passes through key During groove 2, sensing element 4 can feed back a signal and pass to control system, and now circumferential movement is demarcated, it is ensured that every time When checking the walking of dolly 3 to keyway 2, the circumferential coordinate of control system is actual value, it is to avoid the accumulation of circumferential error.
Step 4)Circumferential position is corrected and error cancelling method
Circumferential position correct and error cancelling method stream as shown in Fig. 2 first to check dolly 3 carry out circumferential initial alignment, Again slow circumferential mobile inspection dolly 3 is near keyway 2, and records circumferential coordinate during 4 value changes of sensing element, then will check Dolly 3 moves to scanning initial point position, arranges scanning path and step number N, and starts scanning.
When checking that dolly 3 moves to keyway 2, the relation of circumferential position now and actual value is contrasted, if deviation More than the threshold value of setting, circumferential position correction and error concealment are carried out.Otherwise, circumferential scanning is continued.
During whole scanning, when checking that dolly 3 reaches the terminal of setting, step number N-1 determines whether 0, if For 0, scanning terminates.Otherwise, reverse scanning is carried out.When the starting point of the arrival setting of dolly 3 is looked into, step number N-1 determines whether 0, If 0, scanning terminates.Otherwise, positive scanning is carried out.Then, dolly 3 is checked according to this flow process scanning, until step number N becomes 0。
More specifically, when checking, equitable subsection can be passed through, it is ensured that each scanning section at least includes a keyway, uses In the aligning of current scanning section.
According to the flow implementation shown in Fig. 2 flow charts.First circumferential initial alignment is carried out to checking dolly 3, then it is slow circumferential It is mobile to check dolly 3 near keyway 2, and circumferential coordinate during 4 value changes of sensing element is recorded, then will check that dolly 3 is moved To scanning initial point position, scanning path and step number N are set, and start scanning.
When checking that dolly 3 moves to keyway 2, the relation of circumferential position now and actual value is contrasted, if deviation More than the threshold value of setting, circumferential position correction and error concealment are carried out.Otherwise, circumferential scanning is continued.
During circumferential scanning, check that dolly, from setting starting point, when checking that dolly 3 reaches the terminal of setting, makes scanning Step number N=N-1, then judges whether scanning step number N is 0, and if 0, scanning terminates.Otherwise, reverse scanning is carried out, i.e., from setting Terminal scanning is determined to setting starting point.When the starting point of the arrival setting of dolly 3 is looked into, scanning step number N=N-1 is made, then judge that scanning is walked Whether number N is 0, and if 0, scanning terminates.Otherwise, positive scanning is carried out.Then, dolly 3 is checked according to this flow process scanning, directly Become 0 to scanning step number N.
Embodiments of the invention are explained in detail above, above-mentioned embodiment is only most highly preferred embodiment of the invention, But the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, can with Various changes can be made on the premise of without departing from present inventive concept.

Claims (2)

1. a kind of nuclear reactor pressure container screwed hole is with nondestructive inspection (NDI) circumferential position antidote, it is characterised in that
Step 1, multiple keyways of support level on nuclear reactor pressure container are set as into position reference;
Step 2, be set as inside the keyway of position reference install sensing element (4);
Step 3, the lossless scanning dolly of nuclear reactor pressure container screwed hole band pass through the sensing element (4) when, sensing unit Part (4) provides the true circumferential position of scanning dolly;
During step 4, the true circumferential position of dolly of scanning dolly self induction in future element (4) offer and dolly displacement The measurement circumferential position of measurement is compared, and carries out circumferential position correction.
2. nuclear reactor pressure container screwed hole as claimed in claim 1 is with nondestructive inspection (NDI) circumferential position antidote, its feature It is in the step 4, if true circumferential position is more than specified threshold with the deviation of measurement circumferential position, to use True circumferential position is corrected to the little truck position of scanning.
CN201310751154.XA 2013-12-31 2013-12-31 Non-destructive inspection circumferential position correction method for thread hole belt of nuclear reactor pressure vessel Active CN104751914B (en)

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Publication number Priority date Publication date Assignee Title
CN106935290B (en) * 2015-12-30 2018-09-28 核动力运行研究所 A kind of reactor pressure vessel flange hole band craft checking tool
CN105817831B (en) * 2016-05-13 2018-07-10 中广核研究院有限公司 The screw hole defects detection and restorative procedure of nuclear power station large container and equipment, device
CN108269624B (en) * 2016-12-30 2023-10-20 核动力运行研究所 Circumferential motion simulation bench for pressure vessel flange crawling trolley
CN109975426B (en) * 2017-12-28 2023-10-20 核动力运行研究所 Circumferential positioning device and method of large-diameter cylinder inner wall ultrasonic detection equipment
CN111380954A (en) * 2018-12-28 2020-07-07 核动力运行研究所 Ultrasonic automatic inspection device for pressure vessel of high-temperature gas cooled reactor nuclear reactor

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US4600115A (en) * 1984-11-01 1986-07-15 Framatome & Cie Temporary obturation panel of a passage inside a vessel accessible only through an orifice of smaller size
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US4600115A (en) * 1984-11-01 1986-07-15 Framatome & Cie Temporary obturation panel of a passage inside a vessel accessible only through an orifice of smaller size
CN201237584Y (en) * 2008-07-11 2009-05-13 四川大学 Autotracking ultrasonic wave on-line fault detection system for slewing body profile

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