JP2519724B2 - Control rod drive - Google Patents
Control rod driveInfo
- Publication number
- JP2519724B2 JP2519724B2 JP62118995A JP11899587A JP2519724B2 JP 2519724 B2 JP2519724 B2 JP 2519724B2 JP 62118995 A JP62118995 A JP 62118995A JP 11899587 A JP11899587 A JP 11899587A JP 2519724 B2 JP2519724 B2 JP 2519724B2
- Authority
- JP
- Japan
- Prior art keywords
- drive
- circuit
- control
- control rod
- solenoid valve
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は原子炉の制御棒を駆動する制御棒駆動装置に
関する。DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a control rod drive device for driving a control rod of a nuclear reactor.
（従来の技術） 一般に沸騰水形原子炉の制御棒は水圧によって駆動さ
れ、水圧を加える方向によって制御棒の挿入あるいは引
抜が行なわれる。水圧の方向を制御するのが方向制御弁
であり、方向制御弁の動作は方向制御弁の電磁弁に駆動
電源を印加することにより行なわれる。(Prior Art) Generally, a control rod of a boiling water reactor is driven by water pressure, and the control rod is inserted or withdrawn depending on the direction in which the water pressure is applied. It is the directional control valve that controls the direction of water pressure, and the operation of the directional control valve is performed by applying drive power to the electromagnetic valve of the directional control valve.
この制御棒の駆動は原子炉の運転上非常に重要である
ため、異常が発生した場合、それを速やかに検出するこ
とが必要であり、このために自己診断回路が設けられて
いる。Since driving the control rod is very important for the operation of the nuclear reactor, it is necessary to promptly detect an abnormality when it occurs, and a self-diagnosis circuit is provided for this purpose.
第３図は制御棒を駆動する方向制御弁の電磁弁の駆動
回路および診断回路の従来例を示したものである。図
中、１は方向制御弁の電磁弁、２はそれを駆動する駆動
接点、３は駆動接点両端の電圧を検出する電圧検出回
路、４は駆動接点を制御する制御回路、５は制御回路４
から駆動接点へ出力される駆動指令S1および電圧検出回
路出力S2を入力し、両者を比較することにより、電磁弁
１の断線あるいは駆動接点２の異常を検出する比較回路
である。本回路においては駆動接点２を閉とすることに
より電磁弁１が動作する。FIG. 3 shows a conventional example of a drive circuit and a diagnostic circuit for a solenoid valve of a directional control valve that drives a control rod. In the figure, 1 is a solenoid valve of a directional control valve, 2 is a drive contact for driving it, 3 is a voltage detection circuit for detecting the voltage across the drive contact, 4 is a control circuit for controlling the drive contact, and 5 is a control circuit 4.
This is a comparison circuit for detecting the disconnection of the solenoid valve 1 or the abnormality of the drive contact 2 by inputting the drive command S 1 and the voltage detection circuit output S 2 output from the drive contact to the drive contact. In this circuit, the solenoid valve 1 operates by closing the drive contact 2.
この構成で、第４図のタイムチャートに示す如く、駆
動指令S1が“L"レベルの時は、駆動接点２が開となるた
め、駆動接点両端電圧Ｖは電源電圧と同じになり、電圧
検出回路出力S2は“H"レベル（電圧有り）となる。一
方、比較回路５は、S1とS2が一致した場合に出力S3を
“L"、一致しなかった場合に出力S3を“H"とする。従っ
て、この時には比較回路出力S3は“H"となる。次に、駆
動指令S1が“H"となった場合は、駆動接点２が閉とな
り、駆動接点両端電圧Ｖは０となる。従って、電圧検出
回路出力S2は“L"（電圧無し）となり、比較回路出力S3
は“H"となる。With this configuration, as shown in the time chart of FIG. 4, when the drive command S 1 is at the “L” level, the drive contact 2 is opened, so the voltage V across the drive contact becomes the same as the power supply voltage. The detection circuit output S 2 becomes “H” level (with voltage). On the other hand, the comparison circuit 5 sets the output S 3 to “L” when S 1 and S 2 match, and sets the output S 3 to “H” when they do not match. Therefore, at this time, the comparison circuit output S 3 becomes “H”. Next, when the drive command S 1 becomes “H”, the drive contact 2 is closed and the voltage V across the drive contact becomes 0. Therefore, the voltage detection circuit output S 2 becomes “L” (no voltage) and the comparison circuit output S 3
Becomes "H".
このことから、電磁弁１が断線でなくかつ駆動接点２
が正常であれば、比較回路出力S3は常に“H"となる。も
し、電磁弁１が断線した場合、駆動指令S1が“L"であっ
ても電圧検出回路３の入力が無くなるため、電圧回路出
力S2は“L"となって、比較回路出力S3は“L"となる。ま
た、駆動接点２が異常となり、S1が“L"にもかかわらず
駆動接点２が閉となった場合、あるいはS1が“H"にもか
かわらず駆動接点２が開のままである場合はいずれも比
較回路出力S3は“L"となる。From this, the solenoid valve 1 is not broken and the drive contact 2
If is normal, the comparison circuit output S 3 is always "H". If the solenoid valve 1 is disconnected, even if the drive command S 1 is “L”, the input of the voltage detection circuit 3 is lost, so the voltage circuit output S 2 becomes “L” and the comparison circuit output S 3 Becomes "L". When the drive contact 2 becomes abnormal and the drive contact 2 is closed even though S 1 is "L", or when the drive contact 2 remains open even though S 1 is "H". In both cases, the comparison circuit output S 3 becomes “L”.
以上のことから比較回路出力S3を見ることにより、電
磁弁１の断線または駆動接点２の異常を判断することが
可能となる。From the above, it is possible to judge the disconnection of the solenoid valve 1 or the abnormality of the drive contact 2 by observing the comparison circuit output S 3 .
（発明が解決しようとする問題点） しかしながら、上記従来方式によると、診断のため駆
動指令S1を“H"にした場合は電磁弁１が動作してしま
う。このため、S1を連続的に“H"にすることはできず、
第５図に示すようなパルス波形とし、１パルスの幅を電
磁弁１の動作時間より小さくしなければならない。(Problems to be Solved by the Invention) However, according to the above conventional method, when the drive command S 1 is set to “H” for diagnosis, the solenoid valve 1 operates. Therefore, S 1 cannot be made “H” continuously,
The pulse waveform is as shown in FIG. 5, and the width of one pulse must be smaller than the operating time of the solenoid valve 1.
これにより、制御回路５にパルス発生回路が必要とな
り、回路が複雑化する。また、駆動指令S1をパルス波形
とした場合、駆動回路両端電圧もパルス状に変化するた
め、電圧検出回路３にもパルス状信号を検出できる機能
が必要となり回路が複雑化する。さらに、例えば制御回
路５内のパルス発生回路が故障した場合S1が連続信号と
なり、電磁弁１が動作してしまうといった問題点が生じ
る。As a result, the control circuit 5 requires a pulse generation circuit, which complicates the circuit. Further, when the drive command S 1 has a pulse waveform, the voltage across the drive circuit also changes in a pulse shape, so the voltage detection circuit 3 also needs a function of detecting a pulsed signal, which complicates the circuit. Further, for example, if the pulse generating circuit in the control circuit 5 fails, S 1 becomes a continuous signal, and the solenoid valve 1 will operate.
そこで、本発明は上記問題点を解決し、駆動指令をパ
ルス波形とすることなく診断が可能な制御棒駆動装置を
提供することを目的とする。Therefore, it is an object of the present invention to solve the above problems and provide a control rod drive device that enables diagnosis without using a pulse waveform as a drive command.
［発明の構成］ （問題点を解決するための手段） 本発明は駆動接点を２つ設け、それらの駆動接点を、
制御棒を駆動する方向制御弁電磁弁の両端と駆動電源間
に１つづつ配し、交互に動作させることにより、診断を
行なうようにしたものである。[Structure of the Invention] (Means for Solving Problems) The present invention provides two driving contacts, and these driving contacts are
One is arranged between both ends of the directional control valve electromagnetic valve for driving the control rod and the driving power source, and alternately operated so that the diagnosis is performed.
（作用） これにより制御回路は、２つの駆動接点に対して一方
が“H"となる駆動指令を出力すれば良いため、パルス回
路を備える必要が無くなり、回路構成が簡単になる。ま
た、２つの駆動指令の一致で制御棒の駆動が行なわれる
ため信頼度が向上する。(Operation) As a result, the control circuit only needs to output a drive command for one of the two drive contacts, one of which is "H", and therefore, it is not necessary to include a pulse circuit, and the circuit configuration is simplified. Further, since the control rod is driven by the coincidence of the two drive commands, the reliability is improved.
（実施例） 第１図は本発明の一実施例による制御棒駆動装置の構
成図を示したものである。図中、第３図と同一符号は同
一または相当部分を示す。この図で第３図の構成と異な
る点は、２つの駆動指令S1A,S1Bにより動作する駆動接
点2A,2Bをそれぞれ電磁弁１の両側に設けた点、それに
伴って電圧検出回路を3A,3Bの２つ設けた点およびこれ
ら電圧検出回路3A,3Bの出力S2A,S2Bと上記駆動指令S1A,
S1Bとを比較回路５に入力するようにした点である。(Embodiment) FIG. 1 is a block diagram of a control rod drive device according to an embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 3 indicate the same or corresponding portions. In this figure, the difference from the configuration of FIG. 3 is that drive contacts 2A and 2B that are operated by two drive commands S 1A and S 1B are provided on both sides of the solenoid valve 1, respectively. , 3B, and the outputs S 2A , S 2B of these voltage detection circuits 3A, 3B and the drive command S 1A ,
The point is that S 1B is input to the comparison circuit 5.
上記構成で、まず、S1A＝S1B＝“L"の場合、駆動接点
2A,2Bは両方とも開となり、V1およびV2はそれぞれ駆動
電源の1/2となる。従って、S2A＝S2B＝“H"（電圧有
り）となる。一方、比較回路５の出力S3は、S1A＝S2Aま
たはS1B＝S2Bの時S3＝“L"とし、S1A≠S2AかつS1B≠S2B
の時S3＝“H"とすると、S3＝“H"となる。駆動指令の１
つ、例えばS1A＝“H"となった場合は駆動接点2Aの両端
電圧は０になるため、S2A＝“L"となり、結果的にS3＝
“H"となる。逆に、S1B＝“H"となった場合も同様であ
る。従って、電磁弁１が断線でなく、かつ駆動接点２が
正常であれば、比較回路出力S3は常に“H"となる。In the above configuration, first, when S 1A = S 1B = “L”, drive contact
Both 2A and 2B are open, and V1 and V2 are each half of the drive power supply. Therefore, S 2A = S 2B = “H” (with voltage). On the other hand, the output S 3 of the comparison circuit 5 is S 3 = “L” when S 1A = S 2A or S 1B = S 2B , and S 1A ≠ S 2A and S 1B ≠ S 2B
Then, if S 3 = “H”, then S 3 = “H”. Drive command 1
For example, when S 1A = “H”, the voltage across drive contact 2A becomes 0, so S 2A = “L”, resulting in S 3 =
It becomes “H”. Conversely, the same applies when S 1B = “H”. Therefore, instead of the electromagnetic valve 1 is disconnected, and if the moving contact 2 is normal, the comparator circuit output S 3 is always to "H".
もし、電磁弁１が断線した場合は、電圧検出回路3A,3
Bの入力が無くなるため、S1A＝S1B＝“L"であってもV1
＝V2＝０となるため、電圧検出回路出力S2A＝S2B＝“L"
となり、S3＝“L"となる。また、駆動接点の１つ、例え
ば2Aが異常となりS1Aが“L"にもかかわらず駆動接点2A
が閉となった場合、あるいはS1Aが“H"にもかかわらず
駆動接点2Aが開のままである場合はS1A＝S2A、S1B≠S2B
となり、S3＝“L"となる。駆動接点2Bが異常となった場
合、または駆動接点2A,2B両方が異常となった場合も同
様にS3＝“L"となる。If the solenoid valve 1 is broken, the voltage detection circuit 3A, 3
Since there is no input of B, V 1 is obtained even if S 1A = S 1B = “L”.
= V2 = 0, so the voltage detection circuit output S 2A = S 2B = “L”
And S 3 = “L”. In addition, one of the drive contacts, for example 2A, becomes abnormal and S 1A is "L", but drive contact 2A
Is closed, or if drive contact 2A remains open despite S 1A being “H”, S 1A = S 2A , S 1B ≠ S 2B
And S 3 = “L”. Similarly, when drive contact 2B becomes abnormal, or when both drive contacts 2A and 2B become abnormal, S 3 = “L”.
このように、診断のために例えば駆動接点2Aを関して
も、駆動接点2Bが開であれば電磁弁１は動作しない。従
って、駆動指令S1Aを連続的に“H"としても電磁弁１は
動作しない。逆に駆動接点2Bを閉した場合も同様であ
る。すなわち、本実施例では駆動接点2A,2Bを交互に開
閉することにより、従来のようなパルス波形を用いるこ
となく、電磁弁を動作させない診断が可能となる。In this way, even if the drive contact 2A is involved for diagnosis, the solenoid valve 1 does not operate if the drive contact 2B is open. Therefore, the solenoid valve 1 does not operate even if the drive command S 1A is continuously set to “H”. Conversely, the same applies when the drive contact 2B is closed. That is, in this embodiment, by alternately opening and closing the drive contacts 2A and 2B, it is possible to perform a diagnosis without operating the solenoid valve without using a pulse waveform as in the conventional case.
この結果、制御回路５にパルス発生回路が不要とな
り、回路が簡単化できる。また、電圧検出回路３にもパ
ルス信号を検出する回路は不要となり、回路を簡単化で
きる。さらに、２つの駆動接点2A,2Bが同時に動作しな
い限り、電磁弁１は動作しないため、たとえ１つの駆動
指令S1が異常となっても電磁弁が動作することは無く、
従来に比べ信頼度が向上する。As a result, the control circuit 5 does not need a pulse generation circuit, and the circuit can be simplified. Further, the voltage detection circuit 3 does not need a circuit for detecting a pulse signal, and the circuit can be simplified. Further, since the solenoid valve 1 does not operate unless the two drive contacts 2A and 2B operate at the same time, the solenoid valve does not operate even if one drive command S 1 becomes abnormal,
The reliability is improved compared to the conventional one.
［発明の効果］ 以上説明したように本発明によれば、制御回路にパル
ス発生回路が不要となり、また、電圧検出回路にもパル
ス信号検出回路が不要となるため、従来に比べて回路構
成が極めて簡単，経済的になる。同時に、制御棒を駆動
する電磁弁は２つの駆動指令、２つの駆動接点が正常な
ときのみ動作する構成となるため、従来の比べて信頼性
が極めて向上する。[Effects of the Invention] According to the present invention as described above, the pulse generation circuit is not required in the control circuit, and the pulse signal detection circuit is not required in the voltage detection circuit. Extremely easy and economical. At the same time, since the solenoid valve that drives the control rod is configured to operate only when the two drive commands and the two drive contacts are normal, the reliability is significantly improved compared to the conventional case.
第１図は本発明の実施例を示す制御棒駆動装置の構成
図、第２図は第１図の動作を示す信号図、第３図は従来
の制御棒駆動装置の構成図、第４図および第５図は第３
図の動作を示す信号図である。 １……方向制御弁の電磁弁、２……駆動接点、３……電
圧検出回路、４……制御回路、５……比較回路、S1,
S1A,S1B……駆動指令、S2,S2A,S2B……電圧検出回路出
力、S3……比較回路出力。FIG. 1 is a block diagram of a control rod drive device showing an embodiment of the present invention, FIG. 2 is a signal diagram showing the operation of FIG. 1, FIG. 3 is a block diagram of a conventional control rod drive device, and FIG. And FIG. 5 shows the third
It is a signal diagram which shows operation | movement of a figure. 1 ... Solenoid valve of directional control valve, 2 ... Drive contact, 3 ... Voltage detection circuit, 4 ... Control circuit, 5 ... Comparison circuit, S 1 ,
S 1A , S 1B ...... Drive command, S 2 , S 2A , S 2B ...... Voltage detection circuit output, S 3 ...... Comparison circuit output.
Claims (1)
駆動接点を動作させ、方向制御弁の電磁弁を駆動するこ
とにより、原子炉の制御棒を駆動する制御棒駆動装置に
おいて、 前記電磁弁両端と交流駆動電源間に配設される２つの駆
動接点と、 これら２つの駆動接点に駆動指令を与え、診断時には前
記２つの駆動接点を交互に開閉駆動する制御回路と、 前記２つの駆動接点の各両端電圧を検出する２つの電圧
検出回路と、 これら２つの電圧検出回路の各出力の前記各駆動指令と
をそれぞれ比較し異常を検出する比較回路とを備えたこ
とを特徴とする制御棒駆動装置。1. A control rod drive device for driving a control rod of a nuclear reactor by operating a drive contact according to a drive command output from a control circuit to drive a solenoid valve of a directional control valve, Two drive contacts arranged between both ends of the valve and the AC drive power source; a control circuit for giving a drive command to these two drive contacts and alternately opening and closing the two drive contacts during diagnosis; Control comprising two voltage detection circuits for detecting voltages at both ends of the contact point and a comparison circuit for comparing the respective drive commands of the outputs of these two voltage detection circuits with each other to detect an abnormality Rod drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62118995A JP2519724B2 (en) | 1987-05-18 | 1987-05-18 | Control rod drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62118995A JP2519724B2 (en) | 1987-05-18 | 1987-05-18 | Control rod drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63285491A JPS63285491A (en) | 1988-11-22 |
| JP2519724B2 true JP2519724B2 (en) | 1996-07-31 |
Family
ID=14750394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62118995A Expired - Lifetime JP2519724B2 (en) | 1987-05-18 | 1987-05-18 | Control rod drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2519724B2 (en) |
-
1987
- 1987-05-18 JP JP62118995A patent/JP2519724B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63285491A (en) | 1988-11-22 |
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