JPS59226893A - Control rod hydraulic control unit controller - Google Patents
Control rod hydraulic control unit controllerInfo
- Publication number
- JPS59226893A JPS59226893A JP58100731A JP10073183A JPS59226893A JP S59226893 A JPS59226893 A JP S59226893A JP 58100731 A JP58100731 A JP 58100731A JP 10073183 A JP10073183 A JP 10073183A JP S59226893 A JPS59226893 A JP S59226893A
- Authority
- JP
- Japan
- Prior art keywords
- control rod
- control unit
- control
- valve
- water pressure
- 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.)
- Pending
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
- Earth Drilling (AREA)
- Fluid-Damping Devices (AREA)
- Vehicle Body Suspensions (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】
〔発明の利用分野〕
本発明は沸騰水型原子力発電所の制御棒駆動水圧系に係
シ、特に、水圧制御ユニットの後備弁に使用するのに好
適な制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a control rod drive hydraulic system of a boiling water nuclear power plant, and particularly relates to a control device suitable for use in a backup valve of a hydraulic control unit. .
従来プラントの水圧制御ユニットでは後備弁は設置され
ていないが、水圧制御ユニットセレクタ弁のゴミかみ等
による制御棒の動作不良が頻繁に発生したため、制御棒
誤動作防止用として水圧制御ユニット後備弁を設置する
構想がある。この構想では、水圧制御ユニット上流の駆
動水ラインに常時「閉」で制御棒の引抜および挿入信号
ありの時に「開」となる電磁弁を設けたものである。Previously, water pressure control units in plants did not have backup valves installed, but as control rod malfunctions frequently occurred due to dust buildup in the water pressure control unit selector valve, a water pressure control unit backup valve was installed to prevent control rod malfunctions. I have a plan to do so. In this concept, a solenoid valve is installed in the drive water line upstream of the hydraulic control unit, which is always closed and opens when a control rod withdrawal or insertion signal is received.
ところで、この方式による後備弁の制御では、水圧制御
ユニットセレクタ弁の誤動作の発見が遅れ炉心特性に好
ましくない影響を与えるという欠点がある。第１図にこ
の後備弁の制御方式を示すフロー図を示し、以下にその
欠点を説明する。By the way, this method of controlling backup valves has a drawback in that detection of malfunction of the hydraulic control unit selector valve is delayed and has an undesirable effect on core characteristics. FIG. 1 shows a flowchart showing the control method of this backup valve, and its drawbacks will be explained below.
第１図において制御棒「Ａ」１の引抜時に、水圧制御ユ
ニット「Ａ」２のセレクタ弁３がゴミか与を起したとす
る。こうなるとセレクタ弁３は開きばなしで駆動水はセ
レクタ弁３を通して流れ続けるが、制御棒駆動タイマー
により水圧制御ユニット後備弁４が「閉」となるので、
制御棒「Ａ」１は規定量のみ動作しこのときは不具合は
生じないが、セレクタ弁３のゴミかみは全くわからない
。In FIG. 1, when the control rod "A" 1 is withdrawn, it is assumed that the selector valve 3 of the hydraulic control unit "A" 2 becomes contaminated with dirt. In this case, the selector valve 3 remains open and the drive water continues to flow through the selector valve 3, but the control rod drive timer causes the water pressure control unit back-up valve 4 to close.
The control rod "A" 1 operates only by the specified amount and no problem occurs at this time, but the selector valve 3 is completely obstructed.
次に、制御棒「Ｂ」５を引抜くと制御棒「Ｂ」５は当然
引抜けるが、それと同時にゴミかみを起したセレクタ弁
３に駆動水が流れるため制御棒［〜も引抜かれることに
なる。通常、制御棒の操作において、運転員は操作して
いる制御棒の動きを十分監視できるが、それ以外の多数
の制御棒の動きまでは監視し難い。運転員が予想もしな
いところで制御棒が引抜けると次の不具合が生じる。Next, when the control rod "B" 5 is pulled out, the control rod "B" 5 is naturally pulled out, but at the same time, the drive water flows into the selector valve 3, which caused the dust accumulation, so the control rod [...] is also pulled out. Become. Normally, when operating a control rod, an operator can sufficiently monitor the movement of the control rod that he or she is operating, but it is difficult to monitor the movements of many other control rods. If a control rod is pulled out when the operator does not expect it, the following problems will occur.
（１） 計画された手順以外の制御棒が引抜かれるた
め、局所的な出力ビーキングが生じやすく燃料に対する
制約条件（プレコンディションエンベロープ等）を越え
る恐れがある。(1) Since control rods are withdrawn in a manner other than the planned procedure, local power peaking is likely to occur and fuel constraints (precondition envelope, etc.) may be exceeded.
（２）制御棒引抜阻止設定値近傍での運転中に、セレク
タ弁の不具合が発見されないまま、他の制御棒を操作す
れば、中性子束高々スクラムに至るケースも考え得る。(2) If other control rods are operated while a selector valve malfunction is not discovered during operation near the control rod withdrawal prevention set value, a neutron flux scram may occur.
本発明の目的は、制御棒の動作不良を早期に発見し、運
転員が監視し難い計画外の制御棒引抜に伴う不具合を未
然に防止し得る制御棒水圧制御ユニット制御装置を提供
するにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a control rod hydraulic control unit control device that can detect control rod malfunctions at an early stage and prevent malfunctions caused by unplanned control rod withdrawals that are difficult for operators to monitor. .
本発明は、制御棒誤動作の早期発見ができるように水圧
制御ユニット後備弁は常時「開」とし、制御棒誤動作発
見時に運転員が中縁よシ後備弁を「閉」とできるよう遠
隔操作スイッチを採用した制御方式としたものである。The present invention has a hydraulic control unit backup valve that is always open so that control rod malfunctions can be detected early, and a remote control switch that allows operators to close the middle edge valve when a control rod malfunction is discovered. The control method adopted is
まだ、運転員の水圧制御ユニット不具合発見もれ（これ
はほとんど考えられない）かつ制御棒引抜阻止設定値近
傍運転中の制御棒操作に対しても、念のため制御棒引抜
阻止信号発生で水圧制御ユニット後備弁「閉」となるイ
ンターロック設けた制御方式としたものである。Even if an operator fails to discover a malfunction in the water pressure control unit (this is highly unlikely) and operates a control rod during operation near the control rod withdrawal prevention set value, a control rod withdrawal prevention signal is generated to prevent water pressure. The control system is equipped with an interlock that closes the control unit backup valve.
第２図は本発明の詳細な説明するフロー図である。第２
図において水圧制御二二ツ） ｒＡＪ ２゜水圧制御ユ
ニツ）ｒＢＪ６．・・・・・・の上流の駆動水ライン７
に水圧制御ユニット後備弁４を設ける。FIG. 2 is a flow diagram illustrating the present invention in detail. Second
In the figure, water pressure control unit (22) rAJ 2° water pressure control unit) rBJ6. Drive water line 7 upstream of ......
A water pressure control unit back-up valve 4 is installed in the
水圧制御ユニット後備弁４は、常時「開」とし中縁から
の手動遠隔操作で「閉」とする。The water pressure control unit backup valve 4 is always "open" and "closed" by manual remote control from the middle edge.
また、水圧制御ユニット後備弁４は、制御棒引抜阻止信
号発生時に「閉」とする。Further, the hydraulic control unit back-up valve 4 is "closed" when the control rod withdrawal prevention signal is generated.
今、制御棒ｒＡＪ ｉの引抜時に、水圧制御ユニット「
Ａ」２のセレクタ弁３がゴミかみを起した表する。こう
なるとセレクタ弁３は開きばなしで駆動水はセレクタ弁
３を通して流れ続けるため制御棒ｒＡＪ ｌは規定量を
超えて引抜かれる。これを監視している運転員は即ちに
異常を発見でき、中縁よりの手動遠隔操作スイッチによ
り水圧制御ユニット後備弁４を「閉」にできる。このこ
とによって制御棒駆動水が停止されるので、制御棒「Ａ
Ｊｌの過剰引抜を阻止でき不具合の拡大を防ぐことがで
きる。Now, when withdrawing the control rod rAJ i, the water pressure control unit "
This indicates that the selector valve 3 of "A" 2 has become contaminated. In this case, the selector valve 3 remains open and the driving water continues to flow through the selector valve 3, so the control rod rAJl is withdrawn by more than the specified amount. The operator who is monitoring this can immediately discover any abnormalities and can close the water pressure control unit back-up valve 4 using a manual remote control switch from the middle edge. This stops the control rod drive water, so the control rod
Excessive withdrawal of JL can be prevented and the expansion of the problem can be prevented.
この異常発見後に制御棒ｒＡＪｉは、非常用挿入をかけ
全挿入状態で保持しておき、次に水圧制御ユニット後備
弁４を「開」として通常運転に復帰する。After this abnormality is discovered, the control rod rAJi is inserted in an emergency manner and maintained in the fully inserted state, and then the water pressure control unit back-up valve 4 is opened to return to normal operation.
また、何かの具合で運転員が自分で操作している制御棒
の異常引抜を気づかずに引続き制御棒が引抜れだ場合を
想定して、制御棒引抜阻止信号発生時に水圧制御ユニッ
ト後備弁４が自動「閉」となるインターロックを設ける
。このことによシブラントの安全性をさらに高めること
ができる。In addition, in case an operator does not notice abnormal withdrawal of a control rod that he or she is operating and the control rod continues to be withdrawn, the water pressure control unit backup valve is installed when a control rod withdrawal prevention signal is generated. Provide an interlock that automatically closes 4. This can further enhance the safety of the syblant.
第３図は本発明の他の実施例を示すもので、第２図と異
なるのは水圧制御ユニット後備弁４を二重化したもので
ある。この実施例では、ｌりの電磁弁の故障（電磁コイ
ルの焼損等）によっても本機能が喪失しない効果がある
。FIG. 3 shows another embodiment of the present invention, which differs from FIG. 2 in that the water pressure control unit backup valve 4 is duplicated. This embodiment has the advantage that this function will not be lost even if one or more electromagnetic valves malfunction (burnout of the electromagnetic coil, etc.).
〔発明の効果〕 ・ 本発明によれば次の効果がある。〔Effect of the invention〕 · According to the present invention, there are the following effects.
（１） 運転員は水圧制御ユニット異常の早期発見が
できる。(1) Operators can detect abnormalities in the water pressure control unit early.
（２）運転員は制御棒の異常引抜を即座に停止できる。(2) Operators can immediately stop abnormal withdrawal of control rods.
（３）計画外・予想外の制御棒異常引抜を防止できるた
め、燃料に対する制約条件（プレコンディションエンベ
ロープ等）を越える恐れはなくなる。(3) Unplanned and unexpected control rod abnormal withdrawals can be prevented, so there is no risk of exceeding fuel constraints (precondition envelope, etc.).
（４）計画外・予想外の制御棒鏝常引抜を防止できるた
め、中性子束高々スクラムに至るケースもなくなる。(4) Unplanned and unexpected control rod withdrawals can be prevented, which eliminates cases where neutron flux at most causes scrams.
第１図は従来の系統フロー図、第２図は本発明のフロー
図、第３図は本発明の変形例を示すフロー図である。FIG. 1 is a conventional system flow diagram, FIG. 2 is a flow diagram of the present invention, and FIG. 3 is a flow diagram showing a modification of the present invention.
Claims (1)
引抜時誤動作防止用の後備弁を備えたプラントにおいて
、後備弁は常時開、制御棒誤動作時に手動遠隔操作で閉
とすることを特徴とする制御棒水圧制御ユニット制御装
置。 ２、特許請求の範囲第１項において、前記後備弁に制御
棒引抜阻止検出系からの制御棒引抜阻止信号で自動閉と
なるインターロックを設けたことを特徴とする制御棒水
圧制御ユニット制御装置。[Claims] 1. In a plant equipped with a backup valve for preventing malfunction when a control rod is inserted or withdrawn in the drive water line upstream of the hydraulic control unit, the backup valve is always open and can be closed by manual remote control in the event of a control rod malfunction. A control rod hydraulic control unit control device characterized by: 2. The control rod hydraulic control unit control device according to claim 1, wherein the backup valve is provided with an interlock that automatically closes in response to a control rod withdrawal prevention signal from a control rod withdrawal prevention detection system. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58100731A JPS59226893A (en) | 1983-06-08 | 1983-06-08 | Control rod hydraulic control unit controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58100731A JPS59226893A (en) | 1983-06-08 | 1983-06-08 | Control rod hydraulic control unit controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59226893A true JPS59226893A (en) | 1984-12-20 |
Family
ID=14281736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58100731A Pending JPS59226893A (en) | 1983-06-08 | 1983-06-08 | Control rod hydraulic control unit controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59226893A (en) |
-
1983
- 1983-06-08 JP JP58100731A patent/JPS59226893A/en active Pending
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