JP2953752B2 - Control rod drive - Google Patents
Control rod driveInfo
- Publication number
- JP2953752B2 JP2953752B2 JP2168546A JP16854690A JP2953752B2 JP 2953752 B2 JP2953752 B2 JP 2953752B2 JP 2168546 A JP2168546 A JP 2168546A JP 16854690 A JP16854690 A JP 16854690A JP 2953752 B2 JP2953752 B2 JP 2953752B2
- Authority
- JP
- Japan
- Prior art keywords
- control rod
- water
- driving
- rod drive
- hollow fiber
- 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 - Fee Related
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)
- Separation Using Semi-Permeable Membranes (AREA)
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は制御棒駆動装置に係り、特に制御棒駆動機構
に駆動水を供給する制御棒駆動水圧系に改良を加えた制
御棒駆動装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a control rod driving device, and particularly to an improved control rod driving hydraulic system for supplying driving water to a control rod driving mechanism. The present invention relates to a control rod driving device.
（従来の技術） 従来の一般的な沸騰水型原子力発電所の制御棒駆動装
置を第３図及び第４図を参照して説明する。第３図は、
制御棒駆動機構１と水圧制御ユニット２の構成を、第４
図は制御棒駆動水圧系の概略を夫々示す。(Prior Art) A control rod driving device of a conventional general boiling water nuclear power plant will be described with reference to FIGS. 3 and 4. FIG. FIG.
The configuration of the control rod drive mechanism 1 and the hydraulic pressure control unit 2
The figure shows the outline of the control rod drive hydraulic system.
この制御棒駆動機構１は、水圧ピストン駆動方式を採
用したものであり、駆動ピストン1a、インデックスチュ
ーブ1b及びロッキング機構1cとから主に構成されてい
る。そして、駆動ピストン1aは、インデックスチューブ
1bの下部に取付けられており、上下に受圧面を有し、上
記と下面と圧力差により制御棒の挿入及び引抜きを行
う。また、インデックスチューブ1bの外周面には、ロッ
キング用の溝が設けてあり、ラチェットタイプのコレッ
トフィンガ等のロッキング機構1cにより、ある一定のス
トロークだけ動いて係止され、制御棒を所定位置に固定
保持できるようなされている。The control rod drive mechanism 1 employs a hydraulic piston drive system, and is mainly composed of a drive piston 1a, an index tube 1b, and a locking mechanism 1c. And the drive piston 1a is an index tube
It is attached to the lower part of 1b, has a pressure receiving surface on the upper and lower sides, and inserts and pulls out the control rod by the pressure difference between the above and the lower surface. In addition, a locking groove is provided on the outer peripheral surface of the index tube 1b, and the locking mechanism 1c such as a ratchet type collet finger is moved and locked by a certain stroke to fix the control rod in a predetermined position. It has been able to hold.
制御棒駆動水圧系は、制御棒の操作に必要な水圧、流
量を供給し調整するものである。この制御棒駆動水圧系
は、制御棒１本づつに付いている水圧制御ユニット２と
全制御棒に共通な制御棒駆動水圧供給系とからなる。The control rod drive hydraulic system supplies and regulates the water pressure and flow rate necessary for operating the control rod. The control rod drive hydraulic system includes a hydraulic control unit 2 provided for each control rod and a control rod drive hydraulic supply system common to all control rods.
この制御棒駆動水圧系は、プラント運転中に復水脱塩
装置３から脱塩処理された復水を制御棒駆動機構１に供
給するための系統であり、昇圧ポンプとしての駆動水ポ
ンプ４、サクションフィルタ５、駆動水フィルタ６、流
量測定器としてのフローノズル７、流量調整弁8,9、圧
力調整弁10,11、及び安定弁12等から主に構成されてい
る。The control rod drive hydraulic system is a system for supplying condensed water subjected to desalination from the condensate desalination device 3 to the control rod drive mechanism 1 during operation of the plant, and includes a drive water pump 4 as a booster pump. It mainly comprises a suction filter 5, a driving water filter 6, a flow nozzle 7 as a flow measuring device, flow regulating valves 8, 9, pressure regulating valves 10, 11, a stabilizing valve 12, and the like.
そして、復水脱塩装置３から駆動水ポンプ４により送
り込まれた駆動水は、制御棒駆動機構１等の誤作動その
他の原因となる異物を取り除く２種類のフィルタ、即ち
サクションフィルタ５と駆動水フィルタ６を通り、一部
はスクラム水圧系としての充填水ヘッダ13に案内され
る。また、一部は充填水圧力を保持するための流量調整
弁8,9を経て、制御棒駆動機構１を作動させる駆動水圧
系である駆動水ヘッダ14及び制御棒駆動機構ピストンシ
ールの冷却水圧系である冷却水ヘッダ15へ流れる。The driving water fed from the condensate desalination device 3 by the driving water pump 4 is composed of two types of filters for removing foreign substances that cause malfunction or other causes of the control rod driving mechanism 1 or the like, that is, a suction filter 5 and a driving water. A part is guided through the filter 6 to the filling water header 13 as a scram hydraulic system. In addition, a part of the driving water header 14 is a driving water pressure system for operating the control rod driving mechanism 1 through the flow rate regulating valves 8 and 9 for maintaining the filling water pressure, and a cooling water pressure system for the control rod driving mechanism piston seal. To the cooling water header 15.
安定弁12は、並列に設けられた２個の電磁弁で構成さ
れ、通常時における一方の安定弁流量は制御棒駆動機構
１の制御棒の挿入動作に必要な流量と等しく、他方の安
定弁流量は引抜きに必要な流量と等しくなるよう調整さ
れている。そして、安定弁12を出た水は、冷却水配管へ
循環せしめられる。すなわち、制御棒駆動水圧系の駆動
時に、一方の安定弁12を閉じると所定の流量が制御棒駆
動機構１の方に流れ、圧力調整弁10での水圧を一定に保
ったまま動作を行うことができるようなされている。The stabilizing valve 12 is composed of two solenoid valves provided in parallel, and the flow rate of one of the stabilizing valves during normal operation is equal to the flow rate required for the control rod driving mechanism 1 to insert the control rod, and The flow rate is adjusted to be equal to the flow rate required for drawing. Then, the water that has exited the stabilizing valve 12 is circulated to the cooling water pipe. That is, when the control rod drive hydraulic system is driven, when one of the stabilizing valves 12 is closed, a predetermined flow rate flows toward the control rod drive mechanism 1 and the operation is performed while the water pressure at the pressure regulating valve 10 is kept constant. It has been like that.
さらに、安定弁12の下流側には、排水ヘッダ16からの
配管が接続されており、駆動時、駆動水ヘッダ14から制
御棒駆動機構１を通り排水ヘッダ16へ流れる排水は冷却
水ヘッダ15へ送られ、他の水圧制御ユニット２を通して
原子炉圧力容器内へ放出される。Further, a pipe from a drain header 16 is connected to the downstream side of the stabilizing valve 12, and when driven, drain water flowing from the driving water header 14 to the drain header 16 through the control rod driving mechanism 1 flows to the cooling water header 15. It is sent and discharged through another hydraulic control unit 2 into the reactor pressure vessel.
通常運転時は、冷却水のみが流れており、全ての制御
棒駆動機構１を冷却する分だけの定常流量が流れ、夫々
のヘッダ13〜16からは更に制御棒と同数の配管が各水圧
制御ユニット２へ通じている。During normal operation, only the cooling water is flowing, and a steady flow rate is sufficient to cool all the control rod drive mechanisms 1. From each of the headers 13 to 16, the same number of pipes as the number of control rods are used to control each hydraulic pressure. It leads to unit 2.
また、制御棒駆動水圧系には復水貯蔵槽（タンク）18
が備えられ、駆動水の水源を復水脱塩装置３から復水貯
蔵槽（タンク）18に切替えられるようなされている。In addition, the condensate storage tank (tank) 18
The water source of the driving water can be switched from the condensate desalination device 3 to the condensate storage tank (tank) 18.
水圧制御ユニット２は、制御棒駆動水圧供給系からの
充填水、冷却水及び駆動水を制御棒駆動機構１に供給す
るもので、１本の制御棒に対して１個設けられている。The hydraulic pressure control unit 2 supplies the filling water, the cooling water, and the driving water from the control rod driving hydraulic pressure supply system to the control rod driving mechanism 1, and one hydraulic pressure control unit is provided for one control rod.
水圧制御ユニット２は、第３図に示すように、４個の
電磁選択弁21,22,23,24と２個のスクラム弁25,26をまと
めてユニット化したものである。As shown in FIG. 3, the water pressure control unit 2 is a unit in which four electromagnetic selection valves 21, 22, 23, 24 and two scrum valves 25, 26 are collectively formed.
この水圧制御ユニット２は、次のように動作する。 The water pressure control unit 2 operates as follows.
制御棒の挿入動作の際は、挿入用の電磁選択弁21,22
を開き、駆動水ヘッダ14にかかる水圧を駆動ピストン1a
の下面に与えてこの上面の水を排出ヘッダ16へ放出す
る。逆に制御棒の引抜き動作の際は、挿入用の電磁選択
弁21,22を短時間開き、インデックスチューブ1bを僅か
に上昇させてコレットフィンガのロックを外し易くした
後、引抜き用の電磁選択弁23,24を開いて駆動水圧を駆
動ピストン1aの上面にかけ、この下面の水を排出ヘッダ
16へ放出させる。同時に、コレットフィンガをガイドに
沿って押し広げ、インデックスチューブ1bから離して、
自由に引抜きが行えるような状態にして、制御棒の引抜
きを行う。When the control rod is inserted, the electromagnetic selection valves 21 and 22
And the hydraulic pressure applied to the driving water header 14 is
And discharges the water on the upper surface to the discharge header 16. Conversely, when pulling out the control rod, open the electromagnetic selection valves 21 and 22 for insertion for a short time, raise the index tube 1b slightly to make it easier to unlock the collet fingers, and then pull out the electromagnetic selection valve. Open 23, 24 and apply the drive water pressure to the upper surface of the drive piston 1a.
Release to 16. At the same time, spread the collet finger along the guide, separate from the index tube 1b,
The control rod is pulled out in a state where it can be pulled out freely.
そして、スクラム動作時には、スクラム弁25,26を開
くことによって、充填水ヘッダ13から駆動ピストン1aの
下面に高圧水を流し込むとともに、駆動ピストン1aの上
面の水を大気圧のスクラム排出ヘッダ27へ放出させ、こ
れによって急速なスクラム動作が行えるようなされてい
る。During the scram operation, by opening the scrum valves 25 and 26, high-pressure water flows from the filling water header 13 to the lower surface of the drive piston 1a, and the water on the upper surface of the drive piston 1a is discharged to the atmospheric pressure scram discharge header 27. As a result, a rapid scrum operation can be performed.
以上のような構成で、制御棒駆動装置は、手動制御信
号に応じて、炉心内の制御棒の位置を変えることによ
り、低出力時における出力の増減、長期的な反応度の調
整及び炉内出力分布の調節を行うようなされている。With the above-described configuration, the control rod driving device changes the position of the control rod in the core in response to the manual control signal, thereby increasing or decreasing the output at the time of low output, adjusting the long-term reactivity, and controlling the reactor. It is like adjusting the power distribution.
（発明が解決しようとする課題） 従来の制御棒駆動装置には、制御棒を駆動する制御棒
駆動機構１の駆動水を浄化し、クラッド等の異物を除去
することを目的とした２種類のフィルタ、即ち駆動水を
加圧する昇圧ポンプである駆動水ポンプ４の入口側に絶
対濾過性能25μｍ程度のサクションフィルタ５が、出口
側に絶対濾過性能70μｍ程度の駆動水フィルタ６が夫々
設置され、これによって制御棒駆動機構１の駆動水の濾
過を行なうようなされている。(Problems to be Solved by the Invention) There are two types of conventional control rod driving devices for purifying the driving water of the control rod driving mechanism 1 for driving the control rod and removing foreign substances such as cladding. A suction filter 5 having an absolute filtration performance of about 25 μm is provided at an inlet side of a filter, that is, a driving water pump 4 which is a booster pump for pressurizing driving water, and a driving water filter 6 having an absolute filtration performance of about 70 μm is provided at an outlet side. Thus, the drive water of the control rod drive mechanism 1 is filtered.
しかしながら、この程度の濾過性能では、微小なクラ
ッド等の異物を完全に除去することができず、制御棒駆
動機構１や水圧制御ユニット２に異物が混入してしまう
可能性がある。また、各機器の分解点検や水源切替等の
操作時等に、制御棒駆動水圧系内に空気が混入してしま
うことがあり、このように空気が混入すると制御棒駆動
機構１の駆動性能に影響が出てしまうため、空気を抜く
ためのベント作業を充分に行う必要があるといった問題
点があった。However, with this level of filtration performance, foreign matter such as minute cladding cannot be completely removed, and foreign matter may enter the control rod drive mechanism 1 and the water pressure control unit 2. In addition, air may be mixed into the control rod drive hydraulic system during operations such as disassembly and inspection of each device and switching of the water source, etc. When the air is mixed in such a manner, the driving performance of the control rod drive mechanism 1 is reduced. There is a problem that it is necessary to sufficiently perform a venting operation for bleeding air since the influence is exerted.
本発明は上述した事情を考慮してなされたもので、制
御棒駆動水圧系に混入した異物をほぼ完全に除去できる
程度まで濾過性能を上げるとともに、空気も補集できる
ようにして、異物及び空気の混入のない駆動水を制御棒
駆動機構に供給できるようにした制御棒駆動装置を提供
することを目的とする。The present invention has been made in consideration of the above-described circumstances, and enhances filtration performance to such an extent that foreign matters mixed in the control rod drive hydraulic system can be almost completely removed, and also allows air to be collected, so that foreign matters and air can be collected. It is an object of the present invention to provide a control rod drive device capable of supplying drive water free of water to a control rod drive mechanism.
（課題を解決するための手段） 上述した課題を解決するために、本発明に係る制御棒
駆動装置は、沸騰水型原子炉の制御棒を駆動する制御棒
駆動機構に制御棒駆動水圧系から制御棒駆動機構駆動用
の駆動水を昇圧ポンプを用いて供給するようにした制御
棒駆動装置において、上記制御棒駆動水圧系の昇圧ポン
プの下流側の配管内に上記駆動水を浄化する中空糸膜フ
ィルタを介装したものである。(Means for Solving the Problems) In order to solve the above-mentioned problems, a control rod driving device according to the present invention includes a control rod driving mechanism for driving a control rod of a boiling water reactor, which is provided with a control rod driving hydraulic system. In a control rod driving device configured to supply a driving water for driving a control rod driving mechanism using a booster pump, a hollow fiber for purifying the driving water in a pipe downstream of the booster pump of the control rod driving hydraulic system. It has a membrane filter interposed.
（作用） 本発明に係る制御棒駆動装置は上記のように構成した
ので、中空糸膜フィルタは、このフィルタの中空糸の表
面にある0.1μｍ以下の濾過孔により、液体中の不溶解
性固形分をほぼ完全に除去することができ、かつ空気も
通さないため、制御棒駆動水圧系の内部で制御棒駆動機
構用の駆動水を中空糸膜フィルタを通過させることによ
って濾過し、これによって、クラッド等の異物や空気が
混入した駆動水が制御棒駆動機構等に流入することを防
止することができる。(Operation) Since the control rod driving device according to the present invention is configured as described above, the hollow fiber membrane filter is provided with an insoluble solid in the liquid through a filter hole of 0.1 μm or less in the surface of the hollow fiber of the filter. The drive water for the control rod drive mechanism is filtered by passing it through a hollow fiber membrane filter inside the control rod drive hydraulic system, since the water can be almost completely removed and the air does not pass through. It is possible to prevent the driving water into which the foreign matter such as the clad or the like is mixed with the air from flowing into the control rod driving mechanism or the like.
また、水質等の影響で中空糸膜フィルタにおける差圧
が急上昇しても、この中空糸膜フィルタは昇圧ポンプの
下流側に設置されているため、昇圧ポンプの吸い込み圧
力低下によるキャビテーションの発生の原因となること
もなく、昇圧ポンプの運転に影響を与えることがない。
さらに、昇圧ポンプの点検時には、昇圧ポンプを分解す
ることによって、異物や空気の混入の可能性があるが、
中空糸膜フィルタが昇圧ポンプの下流側に設置されてい
るため、この場合の異物や空気をも捕集し、制御棒駆動
機構に流入することがない。Also, even if the pressure difference in the hollow fiber membrane filter suddenly rises due to the influence of water quality, etc., since the hollow fiber membrane filter is installed on the downstream side of the booster pump, the cause of the occurrence of cavitation due to a decrease in the suction pressure of the booster pump. And the operation of the booster pump is not affected.
Furthermore, when inspecting the booster pump, there is a possibility that foreign matter or air may be mixed in by disassembling the booster pump.
Since the hollow fiber membrane filter is provided on the downstream side of the booster pump, foreign matter and air in this case are also collected and do not flow into the control rod drive mechanism.
（実施例） 以下、本発明に係る制御棒駆動装置の一実施例につい
て、添付図面を参照して説明する。(Embodiment) Hereinafter, an embodiment of a control rod driving device according to the present invention will be described with reference to the accompanying drawings.
第１図に本発明の制御棒駆動装置の第１実施例に係る
制御棒駆動水圧系の系統図を示す。FIG. 1 is a system diagram of a control rod drive hydraulic system according to a first embodiment of the control rod drive device of the present invention.
本実施例は、第４図に示す従来例において昇圧ポンプ
である駆動水ポンプ４の出口側に設置されている駆動水
フィルタ６を中空糸膜フィルタ28に置き換えたものであ
る。In this embodiment, the hollow fiber membrane filter 28 replaces the driving water filter 6 provided on the outlet side of the driving water pump 4 which is a booster pump in the conventional example shown in FIG.
この実施例においては原子力発電プラントの運転中、
復水脱塩装置３からの水は、サクションフィルタ５を通
り、駆動水ポンプ４で加圧された後、中空糸膜フィルタ
28を通って、一部は流量調整弁８及び圧力調整弁10を経
て制御棒駆動機構１に供給されるようなされている。In this embodiment, during operation of the nuclear power plant,
The water from the condensate desalination device 3 passes through the suction filter 5 and is pressurized by the driving water pump 4, and then the hollow fiber membrane filter
Through 28, a part is supplied to the control rod drive mechanism 1 through the flow control valve 8 and the pressure control valve 10.
駆動水に混入したクラッド等の異物は、先ずサクショ
ンフィルタ５を通過することによって除去される。しか
し、このサクションフィルタ５は25μｍ以下の微小不溶
解性固形分は除去されずに駆動水ポンプ４に案内され、
このポンプ４から中空糸膜フィルタ28に吐出される。Foreign matter such as clad mixed in the driving water is first removed by passing through the suction filter 5. However, this suction filter 5 is guided to the driving water pump 4 without removing minute insoluble solids of 25 μm or less,
The water is discharged from the pump 4 to the hollow fiber membrane filter 28.
この中空糸膜フィルタ28では0.1μｍ程度のクラッド
も捕捉され、固形分はほぼ完全に除去される。したがっ
て、中空糸膜フィルタ28を出た駆動水には異物の混入が
ない清浄な水となる。このため、駆動水中の異物の噛み
込み等による制御棒駆動機構１の作動不良等の異常の発
生を有効に防止して駆動性能を安定に保つことができ
る。The hollow fiber membrane filter 28 also captures a clad of about 0.1 μm, and the solid content is almost completely removed. Therefore, the driving water that has exited the hollow fiber membrane filter 28 is clean water free of foreign matter. For this reason, it is possible to effectively prevent the occurrence of an abnormality such as a malfunction of the control rod drive mechanism 1 due to a foreign object being caught in the driving water and to stably maintain the driving performance.
また、第４図に示す従来の制御棒駆動装置において
は、原子力発電プラント建設時、定期検査時における駆
動ポンプなどの機器の分解作業時、および水源を復水脱
塩装置３から復水貯蔵槽（タンク）18へ切替える時に
は、空気を抜くベント作業を充分に実施する必要があっ
たが、本実施例では、制御棒駆動水圧系の駆動水ポンプ
（昇圧ポンプ）４の出口（吐出）側に中空糸膜フィルタ
28が設置されているため、空気はこの中空糸膜フィルタ
28によって捕集される。この空気の捕集によって空気を
抜くベント作業を大幅に削減し、簡略化することができ
る。したがって、原子力発電プラントの建設工程や定期
検査工程の負荷を低減することができて、経済的な運営
が可能となる。Further, in the conventional control rod driving device shown in FIG. 4, when constructing a nuclear power plant, disassembling equipment such as a drive pump during periodic inspection, and changing the water source from the condensate desalination device 3 to the condensate storage tank. When switching to the (tank) 18, it was necessary to sufficiently perform venting work for bleeding air. However, in this embodiment, the outlet (discharge) side of the drive water pump (pressure boost pump) 4 of the control rod drive hydraulic system was used. Hollow fiber membrane filter
28 is installed, the air is
Collected by 28. The venting operation for bleeding air by this air collection can be greatly reduced and simplified. Therefore, the load of the construction process and the periodic inspection process of the nuclear power plant can be reduced, and economical operation is possible.
さらに、水質等の影響で中空糸膜フィルタ28における
差圧が急上昇しても、この中空糸膜フィルタ28である昇
圧ポンプ４の下流側に設置されているため、昇圧ポンプ
４の吸い込み圧力低下によるキャビテーションの発生の
原因となることもなく、昇圧ポンプ４の運転に影響を与
えることがない。Further, even if the pressure difference in the hollow fiber membrane filter 28 suddenly rises due to the influence of water quality or the like, since the hollow fiber membrane filter 28 is installed downstream of the booster pump 4, the suction pressure of the booster pump 4 decreases. It does not cause cavitation and does not affect the operation of the booster pump 4.
第２図は、本発明に係る制御棒駆動装置の第２実施例
を示すもので、本実施例は、第４図に示す従来例におい
て昇圧ポンプである駆動水ポンプ４の入口側に設置され
ているサクションフィルタ５を中空糸膜フィルタ28に置
き換えたものである。他の構成は第４図の構成と異なら
ないので同一符号を付して説明を省略する。FIG. 2 shows a second embodiment of the control rod driving device according to the present invention. This embodiment is installed on the inlet side of a driving water pump 4 which is a booster pump in the conventional example shown in FIG. The suction filter 5 is replaced with a hollow fiber membrane filter 28. The other configuration is not different from the configuration in FIG. 4, and thus the same reference numerals are given and the description is omitted.
復水脱塩装置３からの駆動水は駆動水ポンプ４に入る
前に中空糸膜フィルタ28を通過し、ここで異物が除去さ
れるようなされている。The driving water from the condensate desalination device 3 passes through the hollow fiber membrane filter 28 before entering the driving water pump 4, where foreign matter is removed.
この実施例の場合、異物が取り除かれた駆動水が駆動
水ポンプ４に入るので、駆動水ポンプ４での異物による
噛み込みを防止しつつ、各機器の性能を保持することが
できる。In the case of this embodiment, since the driving water from which the foreign matter has been removed enters the driving water pump 4, the performance of each device can be maintained while preventing the driving water pump 4 from being caught by the foreign matter.
また、第１実施例に示した制御棒駆動装置と同様に、
中空糸膜フィルタ28は空気を補集するので、中空糸膜フ
ィルタ28の上流側で発生した空気が、配管、制御棒駆動
機構１及び水圧制御ユニット２等へ流入してしまうこと
を防止して、空気を抜くためのベント作業の大幅な削減
等を図って経済的な運営を行うことができる。Further, similarly to the control rod driving device shown in the first embodiment,
Since the hollow fiber membrane filter 28 collects air, it is possible to prevent air generated on the upstream side of the hollow fiber membrane filter 28 from flowing into the piping, the control rod driving mechanism 1, the water pressure control unit 2, and the like. In addition, economical operation can be performed by significantly reducing venting work for removing air.
本発明に係る制御棒駆動機構は上述したように構成し
たので、中空糸膜フィルタを介して制御棒駆動水圧系か
ら制御棒駆動機構へ供給される駆動水にクラッド等の異
物が混入するのを防止することができ、これによって制
御棒駆動機構の動作不良等を防止して安定した駆動性能
を保持することができる。Since the control rod drive mechanism according to the present invention is configured as described above, it is possible to prevent foreign matter such as clad from being mixed into the drive water supplied from the control rod drive hydraulic system to the control rod drive mechanism via the hollow fiber membrane filter. Thus, it is possible to prevent the control rod driving mechanism from malfunctioning and maintain stable driving performance.
しかも、原子力発電プラント建設時や定期検査時の分
解作業、更には水源の切替え時に駆動水中に空気が混入
しても、この空気は中空糸膜フィルタで確実に補集さ
れ、通過することがないので、ベント作業を大幅に削減
することができ、ベント作業時間の短縮を図ってより経
済的な運営を行うことができるといった効果がある。In addition, even if air is mixed in the driving water when constructing a nuclear power plant or performing a periodic inspection, or when switching water sources, the air is reliably collected by the hollow fiber membrane filter and does not pass. Therefore, there is an effect that the venting operation can be greatly reduced, and the venting operation time can be reduced and more economical operation can be performed.
【図面の簡単な説明】 第１図及び第２図は本発明に係る制御棒駆動装置の各実
施例を示すもので、制御棒駆動水圧系の系統図、第３図
は沸騰水型原子炉の制御棒駆動機構と水圧制御ユニット
の関連を示す構成図、第４図は従来例を示す制御棒駆動
水圧系の系統図である。 １……制御棒駆動機構、２……水圧制御ユニット、４…
…駆動水ポンプ、５……サクションフィルタ、６……駆
動水フィルタ、13……充填水ヘッダ、14……駆動水ヘッ
ダ、15……冷却水ヘッダ、16……排水ヘッダ、21,22,2
3,24……電磁選択弁、25,26……スクラム弁、28……中
空糸膜フィルタ。BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 show embodiments of a control rod driving device according to the present invention. FIG. 1 is a system diagram of a control rod driving hydraulic system, and FIG. 3 is a boiling water reactor. And FIG. 4 is a system diagram of a control rod driving hydraulic system showing a conventional example. 1 ... control rod drive mechanism 2 ... water pressure control unit 4 ...
... Drive water pump, 5 ... Suction filter, 6 ... Drive water filter, 13 ... Filled water header, 14 ... Drive water header, 15 ... Cooling water header, 16 ... Drain header, 21,22,2
3,24 ... electromagnetic selection valve, 25,26 ... scrum valve, 28 ... hollow fiber membrane filter.
Claims (1)
駆動機構に制御棒駆動水圧系から制御棒駆動機構駆動用
の駆動水を昇圧ポンプを用いて供給するようにした制御
棒駆動装置において、上記制御棒駆動水圧系の昇圧ポン
プの下流側の配管内に上記駆動水を浄化する中空糸膜フ
ィルタを介装したことを特徴とする制御棒駆動装置。1. A control rod drive mechanism for driving a control rod drive mechanism for driving a control rod of a boiling water reactor from a control rod drive hydraulic system using a booster pump to supply drive water for driving the control rod drive mechanism. A control rod driving device, wherein a hollow fiber membrane filter for purifying the driving water is interposed in a pipe on a downstream side of the booster pump of the control rod driving hydraulic system.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2168546A JP2953752B2 (en) | 1990-06-28 | 1990-06-28 | Control rod drive |
| US07/723,330 US5272733A (en) | 1990-06-28 | 1991-06-28 | Control rod driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2168546A JP2953752B2 (en) | 1990-06-28 | 1990-06-28 | Control rod drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0458195A JPH0458195A (en) | 1992-02-25 |
| JP2953752B2 true JP2953752B2 (en) | 1999-09-27 |
Family
ID=15870024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2168546A Expired - Fee Related JP2953752B2 (en) | 1990-06-28 | 1990-06-28 | Control rod drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2953752B2 (en) |
-
1990
- 1990-06-28 JP JP2168546A patent/JP2953752B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0458195A (en) | 1992-02-25 |
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| LAPS | Cancellation because of no payment of annual fees |