CN107256729A - A kind of rod position measurement method based on independent lines ring type stick location probe - Google Patents
A kind of rod position measurement method based on independent lines ring type stick location probe Download PDFInfo
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- CN107256729A CN107256729A CN201710594961.3A CN201710594961A CN107256729A CN 107256729 A CN107256729 A CN 107256729A CN 201710594961 A CN201710594961 A CN 201710594961A CN 107256729 A CN107256729 A CN 107256729A
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- probe
- ring type
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- coil
- independent lines
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Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
-
- 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
Abstract
The invention discloses a kind of rod position measurement method based on independent lines ring type stick location probe, methods described includes：Step 1：When reactor opens heap, measurement obtains the current value of N group probe coils in independent lines ring type stick location probe, step 2：During reactor operation, measurement obtains the current value of N group probe coils；Detector lines loop current initial value and real-time measurement values are done into mathematic interpolation, when above-mentioned current differential exceedes threshold value set in advance, it can determine whether that control rod has arrived at the position of this group of coil, control stick position can not accurately be judged by solving existing rod position measurement method presence, the relatively low technical problem of rod position measurement precision, improves the technique effect of the accuracy, reliability and applicability of rod position measurement.
Description
Technical field
The present invention relates to field of pressurized water reactor nuclear, in particular it relates to a kind of based on independent lines ring type stick location probe
Rod position measurement method.
Background technology
The principle of electromagnetic induction is carried out.When control rod diverse location in detector, stick location probe induction reactance becomes
Change, measuring coil exciting curent just changes, so as to obtain control rod position.
Independent lines ring type stick location probe, i.e. stick location probe have been used by each phases of N in foreign countries' three generations's nuclear power technology at present
Mutually independent measuring coil is constituted, and is connected in parallel, above-mentioned N number of coil is powered between coil using same transformer.
Based on independent lines ring type stick location probe, traditional rod position measurement method is：1) each probe coil is measured
Electric current；2) electric current on all adjacent windings is done into mathematic interpolation；3) above-mentioned difference is compared and draws difference maximum
That group, the position between two groups of coils corresponding to it is the position of control rod.
The shortcoming that above-mentioned rod position measurement method is present is：1) when one group of coil because failure causes electric current to deviate normal value
When, its current differential with neighbouring coil is all very big, so as to lead to not accurate judge control stick position；2) due to coil
Between the external environment condition such as temperature it is different, coil current is also different by externalities, so as to have influence on adjacent windings current differential
Size, cause rod position measurement precision reduction.
In summary, present inventor has found above-mentioned technology extremely during the present application technical scheme is realized
There is following technical problem less：
In the prior art, existing rod position measurement method, which exists, can not accurately judge control stick position, rod position measurement essence
The relatively low technical problem of degree.
The content of the invention
The invention provides a kind of rod position measurement method based on independent lines ring type stick location probe, existing rod is solved
Position measuring method, which exists, can not accurately judge control stick position, and the relatively low technical problem of rod position measurement precision improves the survey of rod position
The technique effect of the accuracy of amount, reliability and applicability.
In order to solve the above technical problems, this application provides a kind of rod position measurement based on independent lines ring type stick location probe
Method, methods described includes：
Step 1：When reactor opens heap, measurement obtains the electricity of N group probe coils in independent lines ring type stick location probe
Flow valuve, N is the positive integer more than 3, is respectively：i1、i2、i3、……、iN；
Step 2：During reactor operation, measurement obtains the current value of N group probe coils, respectively i1t、i2t、
i3t、……、iNt；
Step 3：Measurement result based on step 1 and step 2, the other Ji Suan ∣ i of Fen1t-i1∣、∣i2t-i2∣、∣i3t-i3∣……∣
iNt-iN∣；
Step 4：Jiang ∣ i1t-i1∣、∣i2t-i2∣、∣i3t-i3∣……∣iNt-iN∣ respectively with I1、I2、I3……INCompared
Compared with I1、I2、I3……INFor threshold parameter, as electricity stream Cha Zhi ∣ iNt-iN∣ is more than threshold value INWhen, then show that control rod has arrived at
The corresponding probe coil position of this group of electric current；As electricity stream Cha Zhi ∣ iNt-iN∣ is less than threshold value INWhen, then show that control rod is not reached
The corresponding probe coil position of this group of electric current, so as to realize the real-time measurement to control stick position.
Further, independent lines ring type stick location probe includes N group probe coils, and N groups probe coil is with being arranged
It is fixed on outside the stroke sleeve pipe of control rod.
Further, it is connected after N groups probe coil is in parallel with transformer.
Further, N groups probe coil is respectively equipped with corresponding numbering, the position letter of numbering correspondence probe coil
Breath.
One or more technical schemes that the application is provided, have at least the following technical effects or advantages：
The present invention devises a kind of rod position measurement method based on independent lines ring type stick location probe, 1) the heap moment is being opened,
Gather the electric current initial value of each coil of stick location probe；2) during reactor operation, in real time collection stick location probe each
Coil current value；3) detector lines loop current initial value and real-time measurement values are done into mathematic interpolation；4) when above-mentioned current differential is super
When crossing threshold value set in advance, you can judge that control rod has arrived at the position of this group of coil.Using each coil current initial value
Compare relatively to judge control rod position with measured value, this method principle is simple, without increasing detector and outer treatment circuit
Interface, is easily realized, and effectively overcomes the measurement in traditional measurement method caused by coil fault is different with coil environment
The defect such as inaccurate, improves the applicability of stick location probe.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention；
Fig. 1 is the structural representation of independent lines ring type stick location probe in the application.
Embodiment
The invention provides a kind of rod position measurement method based on independent lines ring type stick location probe, existing rod is solved
Position measuring method, which exists, can not accurately judge control stick position, and the relatively low technical problem of rod position measurement precision improves the survey of rod position
The technique effect of the accuracy of amount, reliability and applicability.
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Mode is applied the present invention is further described in detail.It should be noted that in the case where not conflicting mutually, the application's
Feature in embodiment and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
Implemented with the other modes in the range of being different from being described herein using other, therefore, protection scope of the present invention is not by under
The limitation of specific embodiment disclosed in face.
Independent lines ring type stick location probe structure chart in nuclear power station is as shown in figure 1, it is by N number of independent probe coil group
Into uniformly on stroke sleeve pipe around the home outside control rod, being powered using transformer to N number of coil.Designed by the present invention
Rod position measurement method based on such a stick location probe is：
1) current value of every group of probe coil is measured when reactor opens heap, i is set to1、i2、i3……iN；
2) during reactor operation, the current value of every group of probe coil is monitored in real time, i is set to1t、i2t、i3t……
iNt；
3) the measured current value of probe coil and initial current value are done into difference operation, i.e., meter calculates ∣ i1t-i1∣、∣i2t-i2
∣、∣i3t-i3∣……∣iNt-iN∣；
3) N number of threshold parameter is preset, I is set to1、I2、I3……IN；
4) Jiang ∣ i1t-i1∣、∣i2t-i2∣、∣i3t-i3∣……∣iNt-iN∣ respectively with I1、I2、I3……INCompare.Work as electricity
When flowing difference more than threshold value, then show that control rod has arrived at the corresponding probe coil position of this group of electric current；Work as current differential
During less than threshold value, then show that control rod does not reach the corresponding probe coil position of this group of electric current, so as to realize to control stick
The real-time measurement of position.
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage：
The present invention devises a kind of rod position measurement method based on independent lines ring type stick location probe, 1) the heap moment is being opened,
Gather the electric current initial value of each coil of stick location probe；2) during reactor operation, in real time collection stick location probe each
Coil current value；3) detector lines loop current initial value and real-time measurement values are done into mathematic interpolation；4) when above-mentioned current differential is super
When crossing threshold value set in advance, you can judge that control rod has arrived at the position of this group of coil.Using each coil current initial value
Compare relatively to judge control rod position with measured value, this method principle is simple, without increasing detector and outer treatment circuit
Interface, is easily realized, and effectively overcomes the measurement in traditional measurement method caused by coil fault is different with coil environment
The defect such as inaccurate, improves the applicability of stick location probe.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (4)
1. a kind of rod position measurement method based on independent lines ring type stick location probe, it is characterised in that methods described includes：
Step 1：When reactor opens heap, measurement obtains the current value of N group probe coils in independent lines ring type stick location probe,
N is the positive integer more than 3, is respectively：i1、i2、i3、……、iN；
Step 2：During reactor operation, measurement obtains the current value of N group probe coils, respectively i1t、i2t、
i3t、……、iNt；
Step 3：Measurement result based on step 1 and step 2, the other Ji Suan ∣ i of Fen1t-i1∣、∣i2t-i2∣、∣i3t-i3∣……∣iNt-
iN∣；
Step 4：Jiang ∣ i1t-i1∣、∣i2t-i2∣、∣i3t-i3∣……∣iNt-iN∣ respectively with I1、I2、I3……INIt is compared, I1、
I2、I3……INFor threshold parameter, as electricity stream Cha Zhi ∣ iNt-iN∣ is more than threshold value INWhen, then show that control rod has arrived at group electricity
Flow corresponding probe coil position；As electricity stream Cha Zhi ∣ iNt-iN∣ is less than threshold value INWhen, then show that control rod does not reach group electricity
Corresponding probe coil position is flowed, so as to realize the real-time measurement to control stick position.
2. the rod position measurement method according to claim 1 based on independent lines ring type stick location probe, it is characterised in that solely
Vertical coil type stick location probe includes N group probe coils, and N groups probe coil is fixed on the stroke set of control rod with being arranged
Pipe is outer.
3. the rod position measurement method according to claim 2 based on independent lines ring type stick location probe, it is characterised in that N
It is connected after group probe coil is in parallel with transformer.
4. the rod position measurement method according to claim 1 based on independent lines ring type stick location probe, it is characterised in that N
Group probe coil is respectively equipped with corresponding numbering, the positional information of numbering correspondence probe coil.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710594961.3A CN107256729A (en) | 2017-07-20 | 2017-07-20 | A kind of rod position measurement method based on independent lines ring type stick location probe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710594961.3A CN107256729A (en) | 2017-07-20 | 2017-07-20 | A kind of rod position measurement method based on independent lines ring type stick location probe |
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| CN201710594961.3A Pending CN107256729A (en) | 2017-07-20 | 2017-07-20 | A kind of rod position measurement method based on independent lines ring type stick location probe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111951989A (en) * | 2020-08-13 | 2020-11-17 | 中国核动力研究设计院 | Method and system for intelligently calibrating rod position measurement parameters |
| CN112509718A (en) * | 2020-11-30 | 2021-03-16 | 福建福清核电有限公司 | Gray code processing clamping piece threshold setting device and method for nuclear power station rod position system |
| CN112599264A (en) * | 2020-12-05 | 2021-04-02 | 核电运行研究(上海)有限公司 | Method for accurately positioning position of control rod |
| CN112611309A (en) * | 2020-12-10 | 2021-04-06 | 中核核电运行管理有限公司 | Accurate measurement method for control rod position |
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| CN1808629A (en) * | 2005-01-21 | 2006-07-26 | 清华大学 | Coil self-inductance based control rod position measuring system |
| CN102411999A (en) * | 2011-11-30 | 2012-04-11 | 中广核工程有限公司 | Rod position detector of nuclear reactor control rod |
| US20120321028A1 (en) * | 2011-06-17 | 2012-12-20 | Kabushiki Kaisha Toshiba | Tip system and tip monitoring control equipment |
| CN104332199A (en) * | 2013-07-22 | 2015-02-04 | 中国核动力研究设计院 | Temperature compensating method applied to reactor control rod position detection |
| CN106448768A (en) * | 2016-12-12 | 2017-02-22 | 中广核工程有限公司 | Nuclear power plant control rod position measuring system and method |
-
2017
- 2017-07-20 CN CN201710594961.3A patent/CN107256729A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1808629A (en) * | 2005-01-21 | 2006-07-26 | 清华大学 | Coil self-inductance based control rod position measuring system |
| US20120321028A1 (en) * | 2011-06-17 | 2012-12-20 | Kabushiki Kaisha Toshiba | Tip system and tip monitoring control equipment |
| CN102411999A (en) * | 2011-11-30 | 2012-04-11 | 中广核工程有限公司 | Rod position detector of nuclear reactor control rod |
| CN104332199A (en) * | 2013-07-22 | 2015-02-04 | 中国核动力研究设计院 | Temperature compensating method applied to reactor control rod position detection |
| CN106448768A (en) * | 2016-12-12 | 2017-02-22 | 中广核工程有限公司 | Nuclear power plant control rod position measuring system and method |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111951989A (en) * | 2020-08-13 | 2020-11-17 | 中国核动力研究设计院 | Method and system for intelligently calibrating rod position measurement parameters |
| CN111951989B (en) * | 2020-08-13 | 2022-06-17 | 中国核动力研究设计院 | Method and system for intelligently calibrating rod position measurement parameters |
| CN112509718A (en) * | 2020-11-30 | 2021-03-16 | 福建福清核电有限公司 | Gray code processing clamping piece threshold setting device and method for nuclear power station rod position system |
| CN112509718B (en) * | 2020-11-30 | 2023-06-13 | 福建福清核电有限公司 | Gray code processing clamp threshold setting device and method for rod position system of nuclear power station |
| CN112599264A (en) * | 2020-12-05 | 2021-04-02 | 核电运行研究(上海)有限公司 | Method for accurately positioning position of control rod |
| CN112599264B (en) * | 2020-12-05 | 2023-02-14 | 核电运行研究(上海)有限公司 | Method for accurately positioning position of control rod |
| CN112611309A (en) * | 2020-12-10 | 2021-04-06 | 中核核电运行管理有限公司 | Accurate measurement method for control rod position |
| CN112611309B (en) * | 2020-12-10 | 2022-08-19 | 中核核电运行管理有限公司 | Accurate measurement method for control rod position |
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Application publication date: 20171017 |