JPH01195394A - Output distribution adjusting device for nuclear reactor - Google Patents

Output distribution adjusting device for nuclear reactor

Info

Publication number
JPH01195394A
JPH01195394A JP63016997A JP1699788A JPH01195394A JP H01195394 A JPH01195394 A JP H01195394A JP 63016997 A JP63016997 A JP 63016997A JP 1699788 A JP1699788 A JP 1699788A JP H01195394 A JPH01195394 A JP H01195394A
Authority
JP
Japan
Prior art keywords
control rod
output
reactor
signal
deviation
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
Application number
JP63016997A
Other languages
Japanese (ja)
Inventor
Takeshi Togashi
冨樫 健
Hitoshi Uchiyama
仁 内山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Engineering Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Engineering Co Ltd
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Engineering Co Ltd
Priority to JP63016997A priority Critical patent/JPH01195394A/en
Publication of JPH01195394A publication Critical patent/JPH01195394A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

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  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

PURPOSE:To uniformly burn fuel to efficiently consume a fissionable material in fuel by operating the deviation between a target output and a detection output at each control rod position point in accordance with the target output distribution in the radial direction of a nuclear reactor and the signal of a neutron flux detector. CONSTITUTION:A computing element 6 selects a control rod, whose deviation between the target output and the detection output at each control rod position point in the nuclear reactor is maximum, as the output distribution adjusting control rod in accordance with a target output distribution 8 in the radial direction of the nuclear reactor, a detected neutron flux signal 11, and a detection control rod position signal 12 and outputs a detection output 15 and a target output 16 at the output distribution adjusting selected control rod point. Only when the deviation between these outputs exceeds a prescribed value, a signal is inputted to a control rod controller 20 by a signal limiter 19. A polarity discriminator 21 outputs a signal, which inserts or pulls out the output distribution adjusting selected control rod, to a control rod drive mechanism 3 in accordance with the deviation. Thus, a ratio of a maximum to a minimum of the output in the radial direction of the nuclear reactor is reduced to efficiently consume fuel.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は原子力発電プラントの出力制御装置に係り、特
に、原子炉半径方向出力分布を目標出力分布に調整・維
持するのに好適な原子炉出力分布調整装置に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an output control device for a nuclear power plant, and particularly to a nuclear reactor suitable for adjusting and maintaining the radial power distribution of the reactor to a target power distribution. The present invention relates to an output distribution adjustment device.

〔従来の技術〕[Conventional technology]

従来の装置は、特開昭56−48585号公報に記載の
ように、原子炉の軸方向に対して、その出力分布を目標
値に調整する装置となっていた。
A conventional device, as described in Japanese Patent Application Laid-Open No. 56-48585, is a device that adjusts the power distribution to a target value in the axial direction of the nuclear reactor.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上記従来技術は、原子炉の半径方向については考慮され
ておらず、その半径方向出力分布は原子炉の中心部と外
層部で大きく異ったり、あるいは制御棒の位置1部分的
な新燃料の装荷等により。
The above conventional technology does not take into consideration the radial direction of the reactor, and the radial power distribution may be significantly different between the center and outer parts of the reactor, or the position of the control rod may be partially affected by new fuel. Depending on loading etc.

場所的に出力のずれを生じる場合がある。Output may vary depending on location.

原子炉の半径方向出力に大きなずれを生じると、その出
力の高い部分の燃料チャンネルは燃焼が進み、出力の低
い部分の燃料チャンネルは燃焼が進まず、燃料の消費量
に差を生じることになる。この状態で運転が長期間継続
されると、燃料の取出し時点でも、出力の低かった燃料
チャンネル内には、燃焼しなかった核分裂性物質が多量
に残存することになり、燃料の経済性を大きく低下させ
ることになる。
If there is a large deviation in the radial output of a nuclear reactor, combustion will proceed in the fuel channels in areas with high output, while combustion will not proceed in fuel channels in areas with low output, resulting in a difference in fuel consumption. . If operation continues in this state for a long period of time, a large amount of unburned fissile material will remain in the fuel channel where the output was low even at the time of fuel removal, greatly reducing fuel economy. This will result in a lower level of performance.

本発明の目的は、原子炉内半径方向出方分布のかたより
から、燃料チャンネル内で消費される核分裂性物質量の
差異を小さくし、燃料を均一に燃焼させる出力分布調整
装置を提供することにある。
An object of the present invention is to provide a power distribution adjustment device that reduces the difference in the amount of fissile material consumed in a fuel channel and burns fuel uniformly based on the distribution of radial output inside a nuclear reactor. be.

〔課題を解決するための手段〕[Means to solve the problem]

上記目的は、以下の方法により達成される。すなわち、
燃料を均一に燃焼させるべく設定した原子炉半径方向目
標出力分布と、中性子束検出器の信号とから、各制御棒
位置点での目標出力と検出出力の偏差を演算し、この偏
差が目標出力分布に対する許容範囲内に入るように、制
御棒を駆動し、原子炉の半径方向出力分布を目標出力分
布に調整する。この時、この制御棒の駆動により、原子
炉全体の出力が変化しないように、制御棒が挿入の場合
には、最も出力の低い位置にある制御棒を同時に引抜き
、制御棒が引抜きの場合には、最も出力の高い位置にあ
る制御棒を同時に挿入する。
The above object is achieved by the following method. That is,
The deviation between the target output and the detected output at each control rod position point is calculated from the reactor radial target output distribution set to uniformly burn the fuel and the neutron flux detector signal, and this deviation is the target output. The control rods are driven to adjust the reactor's radial power distribution to the target power distribution so that the distribution is within the tolerance range. At this time, in order to prevent the output of the entire reactor from changing due to the drive of the control rods, when the control rods are inserted, the control rods at the lowest output position are simultaneously withdrawn, and when the control rods are withdrawn, the control rods at the lowest output position are simultaneously withdrawn. Insert the control rods at the highest output position at the same time.

〔作用〕[Effect]

原子炉半径方向目標出力分布は、燃料の燃焼計画に基づ
き、燃料を均一に燃焼させ、高い燃焼度を確保するため
に適切な出力分布を設定する。この目標出力分布を基に
、演算器において炉心内各制御棒位置点での目標出力が
求められる。また、この演算器では、中性子検出器から
の信号により。
The target power distribution in the reactor radial direction is based on the fuel combustion plan, and sets an appropriate power distribution in order to uniformly burn the fuel and ensure a high burnup. Based on this target output distribution, the target output at each control rod position within the core is determined by a computing unit. In addition, this computing unit uses signals from a neutron detector.

目標出力と同様の方法により、各制御棒位置点での検出
出力が求められる。演算器では、これらの情報をもとに
、目標出力と検出出力の偏差が最大の制御棒を選択し、
その目標出力と検出出力を制御棒の制御装置へ出力する
。この偏差が目標出力分布に対して、許容範囲を越えて
いる場合に、制御棒を駆動し、出力が目標出力分布の許
容範囲内に入るようにする。しかし1.この制御棒の駆
動だけでは、原子炉全体の出力が変動してしまうため、
制御棒が挿入方向に駆動される場合は、最も出方の低い
位置に挿入されている制御棒を同時に引き抜き、制御棒
が引抜方向に駆動される場合は、同時に挿入を行う。こ
の原子炉の全出力を補償するために駆動される制御棒は
、制御棒位置検出器からの信号に基づいて選択される。
The detected output at each control rod position point is determined using the same method as the target output. Based on this information, the calculator selects the control rod with the maximum deviation between the target output and the detected output, and
The target output and detected output are output to the control rod control device. If this deviation exceeds the permissible range with respect to the target output distribution, the control rod is driven so that the output falls within the permissible range of the target output distribution. But 1. If only the control rods are driven, the output of the entire reactor will fluctuate, so
When the control rods are driven in the insertion direction, the control rods inserted at the lowest protruding position are pulled out at the same time, and when the control rods are driven in the withdrawal direction, they are inserted at the same time. The control rods that are driven to compensate for the full power of the reactor are selected based on signals from control rod position detectors.

また、この検出出力を目標出力分布の範囲内に調整する
ために駆動される制御棒の反応度と、原子炉全出方補償
のために駆動される制御棒とでは、その反応度価値が異
なるため、補償用に駆動する制御棒の駆動に際しても演
算器により、目標出力と検出出力を制御棒制御装置へ出
力し、両者の制御棒の駆動によりどちらかの出力が許容
範囲内に入った時点で、両方の制御棒の駆動を禁止する
。この制御棒の駆動中、演算器は、制御棒選択信号が変
化しないようにホールドする。また、これらの制御棒の
駆動により1M子炉全出力が設定値に対しである値以上
に変化した場合は、制御棒の駆動を禁止する。
In addition, the reactivity value of the control rods that are driven to adjust the detected output within the range of the target output distribution is different from that of the control rods that are driven to compensate for the total output of the reactor. Therefore, even when driving the control rods for compensation, the computer outputs the target output and detected output to the control rod control device, and when either of the outputs falls within the allowable range by driving both control rods. , prohibiting both control rods from driving. While driving this control rod, the computing unit holds the control rod selection signal so that it does not change. Further, if the total output of the 1M child reactor changes by more than a certain value from the set value due to the drive of these control rods, the drive of the control rods is prohibited.

〔実施例〕〔Example〕

以下、本発明の一実施例を図面を参照して説明する。第
2図は、本発明の方法をある原子力発電プラントに適用
した場合の概略図の一例である。
Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 2 is an example of a schematic diagram when the method of the present invention is applied to a certain nuclear power plant.

この原子力発電プラントは、原子炉1.制御棒2゜制御
棒駆動機構3.中性子検出器4.制御棒位置検出器5.
制御棒制御装置7を設けており、検出中性子束信号11
.検出制御棒位置信号12.原子炉半径方向目標出力分
布82選択制御捧ホールド信号14を原子炉出力分布調
整装置30に入力し、制御棒制御装置7では、原子炉出
力分布調整装置30からの信号と、制御棒駆動スイッチ
9からの制御棒駆動許可信号29により、制御棒駆動機
構3に制御信号を出力し、出力制御棒2を駆動する。
This nuclear power plant has a reactor 1. Control rod 2° Control rod drive mechanism 3. Neutron detector 4. Control rod position detector5.
A control rod control device 7 is provided, and a detected neutron flux signal 11
.. Detection control rod position signal 12. The reactor radial target power distribution 82 selection control hold signal 14 is input to the reactor power distribution adjustment device 30, and the control rod control device 7 receives the signal from the reactor power distribution adjustment device 30 and the control rod drive switch 9. A control rod drive permission signal 29 from the control rod drive mechanism 3 outputs a control signal to the control rod drive mechanism 3 to drive the output control rod 2.

第1図は、本発明の原子炉出力分布調整装置の実施例を
示す制御ブロック図である。演算器6では、原子炉半径
方向目標出力分布8.検出中性子束信号11.検出制御
捧位置信号12とから、原子炉内各制御捧位置点での目
標出力と検出出力の偏差が最大である制御棒を出力分布
調整用制御棒として選択し、出力分布調整用選択制御棒
点の検出出力15と、出力分布調整用選択制御棒点の目
標出力16が出力される。この二つの信号の偏差は、信
号制限器19により所定の値を越えた時だけ、制御棒制
御器20に信号が入力される。極性判別器21では、偏
差から出力分布調整用選択制御棒の挿入、あるいは、引
抜きのどちらかの信号を制御棒駆動機構3へ出力する。
FIG. 1 is a control block diagram showing an embodiment of the reactor power distribution adjusting device of the present invention. The computing unit 6 calculates the reactor radial target power distribution 8. Detected neutron flux signal 11. From the detection control head position signal 12, the control rod with the maximum deviation between the target output and the detected output at each control head position point in the reactor is selected as the control rod for power distribution adjustment, and the control rod is selected as the control rod for power distribution adjustment. A detection output 15 of the point and a target output 16 of the selected control rod point for output distribution adjustment are output. A signal is input to the control rod controller 20 only when the deviation between these two signals exceeds a predetermined value by the signal limiter 19. The polarity discriminator 21 outputs a signal for inserting or withdrawing the selected control rod for output distribution adjustment to the control rod drive mechanism 3 based on the deviation.

制御棒制御器20からの信号は制御棒駆動スイッチ9か
らの制御棒駆動許可信号29とのAND条件で出力分布
調整用選択制御棒駆動機構32に制御信号を出力する。
The signal from the control rod controller 20 is ANDed with the control rod drive permission signal 29 from the control rod drive switch 9 to output a control signal to the selected control rod drive mechanism 32 for power distribution adjustment.

また、この時、出力分布調整用制御棒駆動許可ランプ2
2が点灯し、駆動条件を満たしていることを示す。この
ランプは、検出出力と目標出力の偏差が減少し、駆動条
件を満たさなくなった(信号制御器19により制限を受
けた場合)には、消灯する。
Also, at this time, the control rod drive permission lamp 2 for power distribution adjustment
2 lights up, indicating that the drive conditions are met. This lamp is turned off when the deviation between the detected output and the target output decreases and the driving conditions are no longer satisfied (if limited by the signal controller 19).

一方、出力分布調整用選択制御棒を駆動した場合に、原
子炉全体の出力が変動しないように、演算器6では、極
性判別器21からの極性判別信号29により、出力調整
用選択制御棒が挿入の場合には最も出力が低い位置にあ
る制御棒、引抜の場合には最も出力が高い位置にある制
御棒を、原子炉出力補償用制御棒として選択し、原子炉
出力補償用選択制御棒点の検出出力17と原子炉出力補
償用選択制御棒点の目標出力18を出力する。この時1
選択された制御棒点での出力が目標出力に対して許容範
囲以内に入っている時は、制御棒が駆動が出来ないよう
に信号制限器19を設ける。
On the other hand, in order to prevent the output of the entire reactor from fluctuating when the selected control rod for output distribution adjustment is driven, the arithmetic unit 6 uses the polarity discrimination signal 29 from the polarity discriminator 21 to select the selected control rod for output adjustment. In the case of insertion, the control rod at the lowest output position, and in the case of withdrawal, the control rod at the highest output position is selected as the control rod for reactor power compensation, and the selected control rod for reactor power compensation is selected. The detection output 17 of the point and the target output 18 of the selected control rod point for reactor output compensation are output. At this time 1
A signal limiter 19 is provided so that the control rod cannot be driven when the output at the selected control rod point is within an allowable range with respect to the target output.

これにより信号が制限を受けた場合には、原子炉出力補
償用制御捧次選択スイッチ31からの信号により、前回
選択された制御棒の次に最も出力の低い位置、あるいは
、最も出力の高い位置にある“制御棒を選択する。この
時、選択された原子炉出力補償用制御棒が駆動許可を満
足している場合には、原子炉出力補償用選択制御棒駆動
許可ランプ23が点灯する。原子炉出力補償用選択制御
棒駆動機構33では、出力分布調整用選択制御棒の駆動
方向と逆方向に制御棒を駆動するよう、極性反転器24
の信号を入力する。また、これら両者の選択制御棒は、
どちらかが停止した場合には、他の一方も停止するよう
に構成する。
If the signal is restricted as a result, the signal from the reactor power compensation control selection switch 31 will select the next lowest output position or the highest output position after the previously selected control rod. At this time, if the selected control rod for reactor power compensation satisfies the drive permission, the selected control rod drive permission lamp 23 for reactor power compensation lights up. In the reactor power compensation selection control rod drive mechanism 33, the polarity inverter 24 is used to drive the control rods in the opposite direction to the drive direction of the power distribution adjustment selection control rods.
Input the signal. In addition, the selection control rods for both of these are
The configuration is such that when either one stops, the other one also stops.

また、仮に原子炉全体の出力に変動が生じても、原子炉
全出力信号25と原子炉全出力設定値26との偏差が所
定値を超えた場合には、制御棒駆動禁止信号34を出力
して、制御棒の駆動を禁止する。
Furthermore, even if the overall reactor output fluctuates, if the deviation between the reactor total output signal 25 and the reactor total output set value 26 exceeds a predetermined value, a control rod drive prohibition signal 34 is output. to prohibit the control rod from driving.

第3図は1M子子牛半径方向目標出力布8と、出力分布
変動許容値28、実際の原子炉半径方向 ・出力分布2
7の一例を示したものであるが、以上の方法を用いるこ
とにより、実際の原子炉半径方向出力分布27を、原子
炉半径方向目標出力分布8の変動許容範囲28内に調整
することができる。
Figure 3 shows 1M calf radial target power distribution 8, power distribution fluctuation tolerance 28, and actual reactor radial direction power distribution 2
By using the above method, the actual reactor radial power distribution 27 can be adjusted to within the variation tolerance range 28 of the reactor radial target power distribution 8. .

本実施例によれば、燃料の燃焼計画に基づき、燃料を均
一に燃焼させ、高燃焼度を確保するために適切な原子炉
半径方向目標出力分布に対して、原子炉半径方向の出力
を、その許容範囲内に調整させることが可能であり、燃
料を均一に燃焼することにより、燃料内の核分裂性物質
を有効に消費でき、燃料費の低減に対して大きな効果が
期待できる。
According to this embodiment, based on the fuel combustion plan, the output in the reactor radial direction is set to It is possible to adjust it within the allowable range, and by uniformly burning the fuel, the fissile material in the fuel can be effectively consumed, and a great effect on reducing fuel costs can be expected.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、原子炉の中心部、外層部、あるいは、
制御棒の位置、新燃料の装荷等により生じる原子炉半径
方向出力の最高出力と最低出力の比を小さくすることが
でき、燃料を均一に燃焼させ、燃料内の核分裂性物質を
効率よく消費することが出来る。
According to the present invention, the core of the nuclear reactor, the outer layer, or
It is possible to reduce the ratio between the maximum and minimum radial power of the reactor caused by the position of control rods, the loading of new fuel, etc., which allows the fuel to burn evenly and efficiently consumes the fissile material in the fuel. I can do it.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例の制御ブロック図。 第2図は本発明をある原子カプラントに適用した例を示
すブロック図、第3図は、原子炉半径方向目標出力分布
と実際の原子炉半径方向出力分布の一例を示す図である
。 1・・・原子炉、2・・・制御棒、3・・・制御捧駆動
機棉、4・・・中性子検出器、5・・・制御棒位置検出
器。
FIG. 1 is a control block diagram of an embodiment of the present invention. FIG. 2 is a block diagram showing an example in which the present invention is applied to a nuclear couplant, and FIG. 3 is a diagram showing an example of the target power distribution in the reactor radial direction and the actual power distribution in the reactor radial direction. DESCRIPTION OF SYMBOLS 1... Nuclear reactor, 2... Control rod, 3... Control rod drive mechanism, 4... Neutron detector, 5... Control rod position detector.

Claims (1)

【特許請求の範囲】[Claims] 1、原子炉の出力を調整する制御棒及び前記制御棒の駆
動機構、前記制御棒の位置検出器、中性子検出器を含む
原子力発電プラントにおいて、原子炉内半径方向目標出
力分布、検出中性子束信号、検出制御棒位置を用いて、
炉心内の前記各制御棒の位置での目標出力と検出出力と
の偏差から、その偏差が最大である位置の前記制御棒を
選択し、前記検出出力と前記目標出力を出力する第一の
演算器、前記検出出力と前記目標出力の偏差を許容範囲
内に抑えるように前記制御棒を駆動する制御器、前記制
御棒の駆動方向により、最も出力の低い位置あるいは出
力の高い位置に挿入されている前記制御棒を選択する第
二の演算器、前記第一の演算器および前記第二の演算器
によつて選択された二本の前記制御棒を同時に駆動する
手段、前記原子炉の出力設定値と検出した原子炉全出力
が許容範囲を越えた場合には前記制御棒の駆動を停止す
る手段を設けたことを特徴とする原子炉出力分布調整装
置。
1. In a nuclear power plant including a control rod that adjusts the output of the reactor, a drive mechanism for the control rod, a position detector for the control rod, and a neutron detector, the target power distribution in the reactor radial direction and the detected neutron flux signal , using the detected control rod position,
A first calculation that selects the control rod at the position where the deviation is maximum based on the deviation between the target output and the detected output at the position of each of the control rods in the reactor core, and outputs the detected output and the target output. a controller that drives the control rod so as to suppress the deviation between the detected output and the target output within an allowable range; and a controller that is inserted at a position with the lowest output or a position with the highest output depending on the driving direction of the control rod. a second computing unit for selecting the control rods in the control rod; means for simultaneously driving the two control rods selected by the first computing unit and the second computing unit; output setting for the reactor; A nuclear reactor power distribution adjustment device, characterized in that it is provided with means for stopping the driving of the control rods when the detected total reactor power exceeds a permissible range.
JP63016997A 1988-01-29 1988-01-29 Output distribution adjusting device for nuclear reactor Pending JPH01195394A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63016997A JPH01195394A (en) 1988-01-29 1988-01-29 Output distribution adjusting device for nuclear reactor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63016997A JPH01195394A (en) 1988-01-29 1988-01-29 Output distribution adjusting device for nuclear reactor

Publications (1)

Publication Number Publication Date
JPH01195394A true JPH01195394A (en) 1989-08-07

Family

ID=11931653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63016997A Pending JPH01195394A (en) 1988-01-29 1988-01-29 Output distribution adjusting device for nuclear reactor

Country Status (1)

Country Link
JP (1) JPH01195394A (en)

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