JPH0481697A - Friction test device for control rod drive mechanism - Google Patents
Friction test device for control rod drive mechanismInfo
- Publication number
- JPH0481697A JPH0481697A JP2194930A JP19493090A JPH0481697A JP H0481697 A JPH0481697 A JP H0481697A JP 2194930 A JP2194930 A JP 2194930A JP 19493090 A JP19493090 A JP 19493090A JP H0481697 A JPH0481697 A JP H0481697A
- Authority
- JP
- Japan
- Prior art keywords
- control rod
- pressure
- rod drive
- drive mechanism
- friction
- 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.)
- Granted
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
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、沸騰水型原子炉に用いられる制御棒駆動機構
の可動部の摺動抵抗（フリクション）の測定方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for measuring sliding resistance (friction) of a movable part of a control rod drive mechanism used in a boiling water nuclear reactor.
沸騰水型原子炉に用いられる制御棒駆動機構の型式は、
現在、二つある。すなわち、水圧駆動式のものと、電動
駆動式のものである。水圧駆動式のものは、現在運転中
の原子カプラントに使用されているもので、従来より、
水圧による通常の駆動の際に可動部の摺動抵抗（フリク
ション）の測定が実施されている。特開昭５８−１３９
０９６号公報には、この−例が示されている。しかし、
電動駆動式のものは、摺動抵抗を測定する方法、及び、
テスト装置に関しては、公知例は見当たらない。The type of control rod drive mechanism used in boiling water reactors is:
There are currently two. That is, there are hydraulic drive type and electric drive type. The hydraulic drive type is currently used in the atomic couplants currently in operation, and has traditionally been
The sliding resistance (friction) of the movable parts is measured during normal driving by water pressure. Japanese Patent Publication No. 58-139
An example of this is given in the publication No. 096. but,
For electrically driven types, there is a method for measuring sliding resistance, and
Regarding the test device, no known examples have been found.
上記の従来技術は、電動駆動式の制御棒駆動機構の可動
部の摺動抵抗（フリクション）の測定に関しては考慮さ
れておらず、その測定手段に問題があった。The above-mentioned conventional technology does not take into consideration the measurement of the sliding resistance (friction) of the movable part of the electrically driven control rod drive mechanism, and there is a problem with the measuring means.
本発明の目的は、フリクションの測定手段を堤供するこ
とにある。An object of the present invention is to provide a means for measuring friction.
上記目的を達成するために、本発明は電動駆動式の制御
棒駆動機構へ高圧水を供給するための弁。To achieve the above object, the present invention provides a valve for supplying high pressure water to an electrically driven control rod drive mechanism.
配管、ポンプ等を設け、従来の水圧駆動機構と同様に水
圧でも駆動出来る装置を設け、従来と同様の測定を可能
としたものである。It is equipped with piping, a pump, etc., and is equipped with a device that can be driven by water pressure in the same way as a conventional hydraulic drive mechanism, making it possible to carry out measurements similar to conventional methods.
第３図において、制御棒駆動機構について説明する。制
御棒駆動機構１は、電動駆動式であって、モータ３、及
びそれにつながるボールねし４、及び、ボールねじの回
転を上下運動に変換するボールナツト５、及びポールナ
ツトの上に設置された（但し、機械的な結合はしていな
い）中空ピストン６、及び中空ビスＩ・ンの上端と結合
した制御棒２等より構成される。In FIG. 3, the control rod drive mechanism will be explained. The control rod drive mechanism 1 is electrically driven, and is installed on a motor 3, a ball screw 4 connected to the motor 3, a ball nut 5 that converts the rotation of the ball screw into vertical movement, and a pole nut. It consists of a hollow piston 6 (not mechanically connected), a control rod 2 connected to the upper end of a hollow screw I, etc.
制御棒駆動機構１は、モータ３の回転駆動により、ボー
ルねじ４が回転し、ポールナツト５が上方あるいは下方
に移動する。ポールナツトの上。In the control rod drive mechanism 1, a ball screw 4 is rotated by rotation of a motor 3, and a pole nut 5 is moved upward or downward. On top of pole nuts.
下動作に伴って、中空ピストン６及び制御棒２の挿入、
引抜動作を行なう。Along with the downward movement, the hollow piston 6 and the control rod 2 are inserted,
Perform a pulling operation.
また、第４図に電動駆動式の制御棒駆動機構に接続され
る系統図を示す。Moreover, FIG. 4 shows a system diagram connected to an electrically driven control rod drive mechanism.
制御棒駆動機構１には、常時、ポンプ２７て昇圧された
パージ水が、パージ水へラダ２４から水圧制御ユニット
２０を経由して、全制御棒駆動機構へ均等に供給されて
いる。In the control rod drive mechanism 1, purge water whose pressure is increased by a pump 27 is constantly supplied evenly to all control rod drive mechanisms from the rudder 24 via the water pressure control unit 20.
また、ポンプ２７は、スクラム動作に必要な水圧を充て
ん水へラダ２５を介して、水圧制御ユニット２０に設置
されたアキュムレータ２２に、常時、供給している。ス
クラム動作は、水圧制御ユニット２０のスクラム弁を急
関し、アキュムレータ２２の圧力を中空ピストン６に与
え、制御棒２を炉内へ挿入する。スクラム水は、ラビリ
ンスシール７を通過し、炉内へ流入する。Further, the pump 27 constantly supplies the water pressure necessary for the scram operation to the accumulator 22 installed in the water pressure control unit 20 via the ladder 25. In the scram operation, the scram valve of the water pressure control unit 20 is activated, the pressure of the accumulator 22 is applied to the hollow piston 6, and the control rod 2 is inserted into the reactor. The scram water passes through the labyrinth seal 7 and flows into the furnace.
第３図を用いて、本発明を説明する。The present invention will be explained using FIG.
制御棒駆動機構１及び制御棒２は、炉内への挿入、引抜
動作を行なう際に、駆動機構内部、あるいは、制御棒と
燃料チャンネルボックス等の摩擦力による摺動抵抗（フ
リクション）が発生する。When the control rod drive mechanism 1 and the control rod 2 are inserted into the reactor or withdrawn, sliding resistance (friction) occurs due to frictional force inside the drive mechanism or between the control rod and the fuel channel box. .
このフリクションが大きいと、挿入、引抜駆動に支障を
きたし、最悪の場合、動作不能に至る恐れがある。この
ため、従来より、このフリクションに管理値を設け、過
大なフリクションを事前に検知することにしている。水
圧駆動式の制御棒駆動機構の場合には、通常の駆動を水
圧によって行なうため、駆動中の駆動ビス１−ンの下部
圧を測定することによって検知が可能であった。すなわ
ち、駆動におけるフリクションの増加は駆動に対する抵
抗となるため、結果として、駆動ピストンの下面圧の増
加として表われる。この圧力変動を測定し、管理基準に
照らして良否を判定することが可能であった。If this friction is large, it will interfere with the insertion and extraction drive, and in the worst case, there is a risk that it will become inoperable. For this reason, conventionally, a control value has been set for this friction to detect excessive friction in advance. In the case of a hydraulic control rod drive mechanism, normal driving is performed by water pressure, so detection was possible by measuring the pressure under the drive screw 1 during drive. That is, an increase in friction during driving becomes a resistance to driving, and as a result, this appears as an increase in the pressure on the lower surface of the driving piston. It was possible to measure this pressure fluctuation and judge whether it was good or bad based on management standards.
これに対して、電動駆動式の場合には、通常の駆動は、
モータによって行なわれるため、上記の水圧式と同様な
判定を行なうことが不可能であった。On the other hand, in the case of an electric drive type, the normal drive is
Since this is carried out by a motor, it has been impossible to make the same determinations as with the above-mentioned hydraulic system.
本発明は、水圧式と同様の判定を行なうための構成に関
するもので、以下のような方法で測定が可能となる。The present invention relates to a configuration for making a determination similar to that of a hydraulic type, and enables measurement by the following method.
制御棒駆動機構には、フリクションテスト時、流量、圧
力を供給する配管８が接続されている。A pipe 8 for supplying flow rate and pressure during a friction test is connected to the control rod drive mechanism.
この配管は、スクラム時に高圧水を供給する配管を経由
してもよい。配管８には、常時閉で、テスト時のみ開く
電磁弁９が設けられている。電磁弁９の上流には、ポン
プ１３が設けられ、フリクションテストに必要な流量、
圧力を供給する。ポンプ１３と電磁弁９の中間から、ポ
ンプ流量をバイパスし、テストに必要な圧力を設定する
。圧力の設定は、絞り弁１１、及び１２によって行なわ
れる。この時、絞り弁１１側には、制御棒駆動機構１に
フリクションテスト時に供給される流量（５０−１００
Ｑ／ｍｉｎ ）と同等の流量が流れるように設定する。This piping may be routed through a piping that supplies high-pressure water during scram. The piping 8 is provided with a solenoid valve 9 that is normally closed and opens only during testing. A pump 13 is provided upstream of the solenoid valve 9, and pumps the flow rate necessary for the friction test.
Supply pressure. The pump flow rate is bypassed from between the pump 13 and the solenoid valve 9, and the pressure required for the test is set. The setting of the pressure takes place by means of throttle valves 11 and 12. At this time, the flow rate (50-100
Set the flow rate to be equal to Q/min).
絞り弁１２には、フリクションの増減に伴う流量変動を
考慮したバイパス量を流すものとする。フリクションテ
スト前には、圧力は約５〜６ ｋｇ／ｃｕｔとなるよう
に設定し、圧力計１６によって確認するものとする。It is assumed that a bypass amount is supplied to the throttle valve 12 in consideration of flow rate fluctuations due to increases and decreases in friction. Before the friction test, the pressure shall be set to approximately 5 to 6 kg/cut and confirmed using the pressure gauge 16.
フリクションテスト時には、電気信号によって電磁弁９
を開くと同時に、電磁弁１０を閉じる。During a friction test, the solenoid valve 9 is activated by an electric signal.
At the same time as opening, the solenoid valve 10 is closed.
これにより、それまで絞り弁１１を通ってバイパスして
いた流量が、電磁弁９を通って、制御棒駆動機構へ流入
することになるが、トータルのポンプ流量は変わらない
ため、供給圧力はそのまま維持することができ、圧力の
安定化が図られる。As a result, the flow rate that had been bypassed through the throttle valve 11 will now flow into the control rod drive mechanism through the solenoid valve 9, but since the total pump flow rate remains unchanged, the supply pressure remains the same. The pressure can be maintained and the pressure can be stabilized.
制御棒駆動機構１に流入した水は、中空ピストンを押上
げ、水圧による挿入が成されるとともに、一部の余剰水
は、ラビリンスシール７を通って炉内へ流入する。The water that has flowed into the control rod drive mechanism 1 pushes up the hollow piston and is inserted by water pressure, while some excess water flows into the reactor through the labyrinth seal 7.
この水圧による駆動中のピストン下面圧力を配管８で測
定するとともに、記録装置１５に測定された圧力をトレ
ースする。The pressure on the lower surface of the piston while being driven by this water pressure is measured by the piping 8, and the measured pressure is traced on the recording device 15.
可動部のフリクションが大きい場合には、トレースされ
た圧力の平均値は大きくなり、管理値を超えるので、良
否の判定が可能である。また、フリクションが駆動中に
変動するような場合には、トレースされた圧力の変動幅
がフリクションの変動幅に相当することになり、やはり
、変動幅の管理値を超えるので、良否の判定が可能であ
る。When the friction of the movable part is large, the average value of the traced pressure becomes large and exceeds the control value, so it is possible to judge whether it is good or bad. In addition, if the friction fluctuates during driving, the traced pressure fluctuation range corresponds to the friction fluctuation range, which also exceeds the control value of the fluctuation range, so it is possible to judge whether the product is good or bad. It is.
以下、本発明の一実施例を第１図により説明する。 An embodiment of the present invention will be described below with reference to FIG.
制御棒駆動機構１には、常時、ポンプ２７で昇圧された
パージ水がパージ水へラダ２４から水圧制御ユニット２
０を経由して、全制御棒駆動機構へ均等に供給されてい
る。ここでは、−台の水圧制御ユニットに二台の制御棒
駆動機構が接続されたシステム例を示している。１３０
０ Ｍ Ｗ ｅクラスの原子炉では、制御棒駆動機構は
２０５台が設置される。In the control rod drive mechanism 1, purge water pressurized by the pump 27 is constantly transferred from the rudder 24 to the water pressure control unit 2.
0 to all control rod drive mechanisms. Here, an example of a system is shown in which two control rod drive mechanisms are connected to one hydraulic control unit. 130
In the 0 MW e class reactor, 205 control rod drive mechanisms will be installed.
この実施例では、前述のフリクションテスト装置を高圧
ホース２９で水圧制御ユニット２０のテスト接続口に接
続している。In this embodiment, the aforementioned friction test device is connected to the test connection port of the water pressure control unit 20 with a high pressure hose 29.
フリクションテストを実施するには、本実施例では、テ
ストを実施する制御棒駆動機構側の隔離弁３０ａを開き
、他方の隔離弁３０ｂを閉しる。To conduct a friction test, in this embodiment, the isolation valve 30a on the side of the control rod drive mechanism to be tested is opened, and the other isolation valve 30b is closed.
フリクションテストは、前述の手順で実施し、記録装置
１５に圧カドレースを記録する。圧カドレースの結果よ
り、圧力の平均値、及び変動幅から、良否を判定する。The friction test is carried out according to the procedure described above, and the pressure drag is recorded on the recording device 15. Based on the results of the pressure drop, the quality is determined from the average pressure value and the fluctuation range.
本実施例によれば、２０５台の制御棒駆動機構に対して
、−台ないしは数台のフリクションテスト装置を接続す
れば、テスト可能であり、設備のコストを最小にするこ
とができる。According to this embodiment, testing can be performed by connecting one or more friction test devices to 205 control rod drive mechanisms, and the equipment cost can be minimized.
第２図に他の実施例を示す。この実施・例ではテスト装
置の圧力、流量供給源をシステム側に設置されたポンプ
２７を利用する場合である。この場合、ポンプ２７の吐
出側に接続口を設けておき、フリクションテストの実施
時に高圧ホース３０を接続し、必要な流量、圧力を供給
する。本実施例によれば、テスト用のポンプが不要とな
り、前述の実施例より、さらにコスト低減を図ることが
可能である。FIG. 2 shows another embodiment. In this embodiment/example, a pump 27 installed on the system side is used as a pressure and flow supply source for the test device. In this case, a connection port is provided on the discharge side of the pump 27, and the high-pressure hose 30 is connected to it when performing a friction test to supply the necessary flow rate and pressure. According to this embodiment, there is no need for a pump for testing, and it is possible to achieve further cost reductions than in the above-mentioned embodiments.
また、これまで述べた実施例は、制御棒駆動機構の中空
ピストンの下面圧を測定した例であるが、測定するデー
タは、駆動機構に供給される流量のトレースであっても
かまわない。流量のトレースであっても、同様の判定が
可能である。Moreover, although the embodiments described so far are examples in which the lower surface pressure of the hollow piston of the control rod drive mechanism is measured, the measured data may be a trace of the flow rate supplied to the drive mechanism. A similar determination can be made even if the flow rate is traced.
また、制御棒駆動機構へ流量、圧力を供給する系統構成
として、本発明では、流量のバイパスラインを設けたが
、ポンプ性能によっては、バイパスラインを設けず、直
接、ポンプの吐出水を駆動機構へ供給し、前述の測定を
実施してもかまわない。In addition, in the present invention, a flow bypass line is provided as a system configuration for supplying flow rate and pressure to the control rod drive mechanism, but depending on the pump performance, the bypass line may not be provided and water discharged from the pump may be directly supplied to the drive mechanism. The above-mentioned measurements may be carried out by supplying the
本発明によれば、電動駆動式の制御棒駆動機構について
、可動部のフリクションを定量的に把握することができ
、良否が判定できる。これにより駆動機構の挿入、引抜
駆動に支障を与えるようなフリクションを事前に検知す
ることができる。According to the present invention, it is possible to quantitatively understand the friction of a movable part of an electrically driven control rod drive mechanism, and it is possible to determine whether it is good or bad. This makes it possible to detect in advance any friction that may impede the insertion or withdrawal of the drive mechanism.
第１図は、本発明の一実施例の系統図、第２図は１本発
明の他の実施例の系統図、第３図は、本発明の一実施例
の系統図、第４図は、電動駆動式の制御棒駆動機構の系
統図である。
１・・・制御棒駆動機構（電動式）、２ 制御棒、３・
・・モータ、４・・・ボールねし、５・・・ボールナツ
ト、６・・中空ピストン、７・・ラビリンスシール、８
配管、９，１０・・・電磁弁、１１．１２・・絞り弁、
１３．２７・・・ポンプ、１４・圧力検出器、１５・記
録装置、１６・・・圧力計、２０・・・水圧制御ユニッ
ト、２１・・・ガス容器、２２・・・アキュムレータ、
２３・・・スクラム弁、２４・・・パージ水ヘッダ、２
５・・・充てん水ヘツダ、２６・・・流量調節弁、２８
゜３１・・接続口、
２９゜
隔離弁。
３２・・・高圧ホース、
３０・・・FIG. 1 is a system diagram of one embodiment of the present invention, FIG. 2 is a system diagram of another embodiment of the present invention, FIG. 3 is a system diagram of one embodiment of the present invention, and FIG. 4 is a system diagram of one embodiment of the present invention. , is a system diagram of an electrically driven control rod drive mechanism. 1... Control rod drive mechanism (electric type), 2 Control rod, 3.
・・Motor, 4・・Ball screw, 5・・Ball nut, 6・・Hollow piston, 7・・・Labyrinth seal, 8
Piping, 9, 10... Solenoid valve, 11.12... Throttle valve,
13.27 Pump, 14 Pressure detector, 15 Recording device, 16 Pressure gauge, 20 Water pressure control unit, 21 Gas container, 22 Accumulator,
23... Scram valve, 24... Purge water header, 2
5... Filling water header, 26... Flow rate control valve, 28
゜31...Connection port, 29゜Isolation valve. 32...High pressure hose, 30...
Claims (1)
制御棒駆動機構に高圧水を供給するために施行された配
管より成る制御棒駆動系において、 前記制御棒駆動機構へ高圧水を供給する配管に操作指令
によつて開閉する弁と流量、圧力を調節する弁と圧力検
出器と圧力記録装置と高圧水ポンプとこれらをつなぐ配
管を設けたことを特徴とする制御棒駆動機構のフリクシ
ョンテスト装置。[Scope of Claims] 1. In a control rod drive system including a control rod drive mechanism used in a boiling water reactor and piping installed to supply high pressure water to the control rod drive mechanism, the control rod drive system comprises: The piping that supplies high-pressure water to the mechanism is equipped with a valve that opens and closes according to an operation command, a valve that adjusts the flow rate and pressure, a pressure detector, a pressure recording device, a high-pressure water pump, and piping that connects these. Friction test device for control rod drive mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2194930A JPH0827382B2 (en) | 1990-07-25 | 1990-07-25 | Control rod drive mechanism friction tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2194930A JPH0827382B2 (en) | 1990-07-25 | 1990-07-25 | Control rod drive mechanism friction tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0481697A true JPH0481697A (en) | 1992-03-16 |
| JPH0827382B2 JPH0827382B2 (en) | 1996-03-21 |
Family
ID=16332709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2194930A Expired - Fee Related JPH0827382B2 (en) | 1990-07-25 | 1990-07-25 | Control rod drive mechanism friction tester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0827382B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007033384A (en) * | 2005-07-29 | 2007-02-08 | Toshiba Corp | Control rod drive mechanism cooling water supply method and cooling water supply device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58139096A (en) * | 1982-02-15 | 1983-08-18 | 株式会社東芝 | Performance testing device for control rod drive mechanism |
| JPS60207093A (en) * | 1984-03-31 | 1985-10-18 | 株式会社東芝 | Measuring device for friction of driving mechanism of control rod |
| JPS6269199A (en) * | 1985-09-24 | 1987-03-30 | 株式会社東芝 | Test apparatus for drive mechanism of control rod |
-
1990
- 1990-07-25 JP JP2194930A patent/JPH0827382B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58139096A (en) * | 1982-02-15 | 1983-08-18 | 株式会社東芝 | Performance testing device for control rod drive mechanism |
| JPS60207093A (en) * | 1984-03-31 | 1985-10-18 | 株式会社東芝 | Measuring device for friction of driving mechanism of control rod |
| JPS6269199A (en) * | 1985-09-24 | 1987-03-30 | 株式会社東芝 | Test apparatus for drive mechanism of control rod |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007033384A (en) * | 2005-07-29 | 2007-02-08 | Toshiba Corp | Control rod drive mechanism cooling water supply method and cooling water supply device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0827382B2 (en) | 1996-03-21 |
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