JPS5855886A - Control rod of reactor - Google Patents
Control rod of reactorInfo
- Publication number
- JPS5855886A JPS5855886A JP56155289A JP15528981A JPS5855886A JP S5855886 A JPS5855886 A JP S5855886A JP 56155289 A JP56155289 A JP 56155289A JP 15528981 A JP15528981 A JP 15528981A JP S5855886 A JPS5855886 A JP S5855886A
- Authority
- JP
- Japan
- Prior art keywords
- control rod
- long
- life
- neutron
- reactor
- 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
- Load-Engaging Elements For Cranes (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- 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】 本発明は原子炉用制御棒に係る。[Detailed description of the invention] The present invention relates to a control rod for a nuclear reactor.
原子炉用制御棒は、中央構造材に細長いＵ字状のンース
を取付けて形成した複数筒のウィング内に、多数の中性
子吸収棒を装填して構成さ扛ている。前記の中性子吸収
棒はＳＵＳから成る被覆管内にＢ、Ｃ粉末を充填し、被
覆管内に一定間隔で粉末移動防止用の仕切球を配置して
構成さｎている。A control rod for a nuclear reactor is constructed by loading a large number of neutron absorption rods into a plurality of cylindrical wings formed by attaching elongated U-shaped rods to a central structural member. The above-mentioned neutron absorption rod is constructed by filling a cladding tube made of SUS with B and C powders and arranging partition balls at regular intervals in the cladding tube to prevent the powder from moving.
中性子吸収棒中のＢＩＣは中性子を吸収して中性子吸収
能力を次第に失い、またその間１０Ｂが中性子と反応し
てＨｅガスを発生し被覆管内の圧力を上昇させる。中性
子吸収能力によって定まる寿命を核的寿命と言い、管内
ガス圧によって定まる寿命全機械的寿命と言う。The BIC in the neutron absorption rod absorbs neutrons and gradually loses its neutron absorption ability, while 10B reacts with the neutrons to generate He gas and increase the pressure inside the cladding tube. The life determined by the neutron absorption capacity is called the nuclear life, and the life determined by the gas pressure inside the tube is called the total mechanical life.
而して、制御棒は一様な中性子照射を受けるものではな
く、例えば各ウィング各側縁、上端部は強度の中性子照
射を受け、そ扛ら側縁部近傍の中性子吸収棒内の中性子
吸収材は多量の中性子を吸収づるので、他部の中件子吸
収棒、Ｊニジ早期に核的を放射性廃棄物として廃棄しな
け扛ばならなかった０
そのような問題を解決するため、強度の中性子照射を受
けるウィング側縁近傍に、本出願人は核的寿命の長い長
寿命型中性子吸収体を配置ＬｆＣ，制御棒を開発し、特
開昭５３−７４６９７号において開示した。Therefore, the control rod is not uniformly irradiated with neutrons; for example, each side edge and upper end of each wing receives intense neutron irradiation, and neutron absorption in the neutron-absorbing rod near the side edge of the control rod increases. Since the material absorbs a large amount of neutrons, other parts of the neutron absorbing rod had to be disposed of as radioactive waste at an early stage. The present applicant has developed a LfC control rod in which a long-life neutron absorber with a long nuclear life is placed near the side edge of the wing that receives neutron irradiation, and disclosed this in Japanese Patent Application Laid-Open No. 74697/1983.
ところが、上記開示の制御棒の寿命は通常型の制御棒の
２倍程度に過ぎず、より長寿命化が求めらｎている現在
の状況に対応できない。However, the life of the control rod disclosed above is only about twice that of a conventional control rod, and cannot meet the current situation where a longer life is required.
本発明は上記の事情に基きなさｔ″したもので、前記開
示の制御棒より格段に長寿命化し得る原子炉用制御棒を
得ることを目的としている。The present invention was developed based on the above-mentioned circumstances, and an object of the present invention is to obtain a control rod for a nuclear reactor that can have a significantly longer life than the control rod disclosed above.
以下、図面につき本発明の詳細な説明する。第１図にお
いてウィング内に制御棒全長の１より若干上部に下端を
位置させ上端近傍に終端するＨｆ。The invention will now be described in detail with reference to the drawings. In FIG. 1, Hf has its lower end located slightly above the control rod's total length 1 within the wing and terminates near its upper end.
Ａｇ−Ｉｎ−Ｃｄ等の板片から成り、ウィング巾とほぼ
等しい巾の板状中性子吸収材ｌが設けである。その上部
にはＨｆまたはＳＵＳから成る被覆管内に關ら〜を充填
封入した長、短の長寿命型吸収棒２．３を長短交互に装
填し、そｎらの間に形成さ【る間隔にはＳＵＳ被覆管中
に水を充填封入した水棒４が配置さｎている５また、板
状中性子吸収材１の下方には、制御棒全長のｉの上方ま
たは下方の等距離の位置で終端する長、短の前記と同様
の長寿命型吸収棒５，６を長短交互に配置し、そｎらの
下方には長、短の通常型中性子吸収棒７，８ヲ交互に配
置しである。なお、板状中性子吸収材１には例えば円形
のくぼみ９を設けである。A plate-shaped neutron absorbing material l made of a plate piece of Ag-In-Cd or the like and having a width approximately equal to the width of the wing is provided. On top of it, long and short long-life absorption rods 2.3, each of which has a cladding made of Hf or SUS and are filled with metal, are loaded alternately between long and short lengths, and the gap formed between them is A water rod 4, which is a SUS cladding tube filled with water, is arranged below the plate-shaped neutron absorbing material 1.The control rod terminates at a position equidistant above or below i of the total length of the control rod. Long-life type absorption rods 5, 6 of long and short lengths similar to those described above are arranged alternately in long and short lengths, and below them, regular type neutron absorption rods 7, 8 of long and short lengths are arranged alternately. . Note that the plate-shaped neutron absorbing material 1 is provided with, for example, a circular depression 9.
上記構成の本発明においては、強度の中性子照射を受け
る部分にのみ長寿命型の中性子吸収材を配置しであるた
め、制御棒の重量、価格の増加は抑制さｎる。In the present invention having the above configuration, the long-life neutron absorbing material is disposed only in the portion that receives intense neutron irradiation, so an increase in the weight and cost of the control rod is suppressed.
また、全長一様な構成の通常型中性子吸収棒を使用した
制御棒による原子炉停止余裕（未臨界度）は第２図Ａに
示す軸方向分布を示し、炉心上、下端および炉心下部に
おいて大きく、上端近傍において最も小である。こｎは
炉心上部において原子炉運転中ボイド率が高く出力密度
が低くなるため、核***性物質のＵ −２３５が多く残
有し、しかもボイド率が高いためＰｕ −２３９の生成
率が高くなるためである。In addition, the reactor shutdown margin (subcriticality) due to control rods using conventional neutron absorption rods with a uniform length configuration shows an axial distribution as shown in Figure 2A, and is large at the top, bottom end, and bottom of the core. , is smallest near the upper end. This is because the void ratio in the upper part of the reactor core is high during reactor operation and the power density is low, so a large amount of fissile material U-235 remains, and the high void ratio increases the production rate of Pu-239. It is.
こｎに対し、上記構成の本発明制御棒の中性子吸収断面
積は、第２図Ｂに示す如く前記の炉停止余裕軸方向分布
曲線を大まかに且つ逆向きに近似する折線状となる。従
って、本発明の制御棒にょ扛ば、第２図Ｃに示す如く、
炉心上部の炉停止余裕が増大さ【その軸方向分布は平坦
化さｎる。On the other hand, the neutron absorption cross section of the control rod of the present invention having the above configuration has a polygonal line shape that roughly approximates the reactor shutdown margin axial distribution curve in the opposite direction, as shown in FIG. 2B. Therefore, if the control rod of the present invention is used, as shown in FIG. 2C,
The reactor shutdown margin in the upper part of the core increases and its axial distribution becomes flat.
上記のように、本発明制御棒においては、必要な部位に
充分長寿命型中性子吸収材を配置しているので、前記開
示の制御棒に比し、格段に長寿命となし得る。なお、板
状中性子吸収材のくぼみは、過大な反応度効果を抑制す
る。As described above, in the control rod of the present invention, sufficiently long-life neutron absorbing materials are arranged at necessary locations, so that the control rod can have a much longer life than the control rod disclosed above. Note that the depressions in the plate-like neutron absorbing material suppress excessive reactivity effects.
なお、本発明は上記実施例のみに限定されない。Note that the present invention is not limited to the above embodiments.
すなわち、長寿命型の中性子吸収材として例示のＦＪｕ
２０３のほか、Ｈｆの丸棒を使用してもよい。In other words, FJu is an example of a long-life neutron absorbing material.
In addition to 203, a Hf round bar may be used.
、第１図は本発明一実施例要部の模式図、第２図Ａ、Ｂ
、Ｃは本発明の詳細な説明するための線図である。
ｌ・・・板状中性子吸収材、２．３．５．６・・・長寿
命型中性子吸収棒、４・・水棒、７，８・・・通常型中
性子吸収棒。
第１図
下埠
第２図
（Ａ） （Ｃ）
鴇 未ｃｖｉ 未結■側（８）
＋−＋嵯メ軟漸良墳, Fig. 1 is a schematic diagram of the main part of an embodiment of the present invention, Fig. 2 A and B
, C are diagrams for explaining the present invention in detail. 1...Plate neutron absorbing material, 2.3.5.6...Long life type neutron absorption rod, 4...Water rod, 7,8...Normal type neutron absorption rod. Figure 1 Shimobu Figure 2 (A) (C) Toki Mi cvi Untied ■ side (8) +-+Same Soft-Senryo Tomb
Claims (1)
、その上部には長短二様の長寿命型中性全長のほぼｉに
終端する長短二様の長寿命型中性子吸収棒を長短交互に
配置し、そｎらの下方には長短二様の通常型中性子吸収
棒を長短交互に配置したことを特徴とする原子炉用制御
棒。The wing has a lower edge slightly above the upper end 7 and is provided in the lie, and on the upper part there are long-life neutron absorbing rods of two lengths, long and short, alternating long and short, terminating at approximately i of the total length of the long-life neutral. A control rod for a nuclear reactor, characterized in that normal neutron absorption rods of two lengths and short lengths are alternately arranged below them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56155289A JPS5855886A (en) | 1981-09-30 | 1981-09-30 | Control rod of reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56155289A JPS5855886A (en) | 1981-09-30 | 1981-09-30 | Control rod of reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5855886A true JPS5855886A (en) | 1983-04-02 |
| JPH021277B2 JPH021277B2 (en) | 1990-01-10 |
Family
ID=15602638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56155289A Granted JPS5855886A (en) | 1981-09-30 | 1981-09-30 | Control rod of reactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5855886A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62242889A (en) * | 1986-04-15 | 1987-10-23 | 株式会社日立製作所 | Control rod |
| JPS6345591A (en) * | 1986-08-13 | 1988-02-26 | 株式会社日立製作所 | Control rod |
| US4876060A (en) * | 1986-06-30 | 1989-10-24 | Kabushiki Kaisha Toshiba | Control blade for nuclear reactor |
| US6226066B1 (en) | 1996-01-09 | 2001-05-01 | Lg. Philips Lcd Co., Ltd. | Method for controlling pretilt angle direction in a liquid crystal cell |
| WO2019123605A1 (en) * | 2017-12-21 | 2019-06-27 | 日立Ｇｅニュークリア・エナジー株式会社 | Control rod and method for cutting used control rod |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58146523U (en) * | 1982-03-20 | 1983-10-01 | 藤本株式会社 | moisture absorber |
-
1981
- 1981-09-30 JP JP56155289A patent/JPS5855886A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58146523U (en) * | 1982-03-20 | 1983-10-01 | 藤本株式会社 | moisture absorber |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62242889A (en) * | 1986-04-15 | 1987-10-23 | 株式会社日立製作所 | Control rod |
| US4876060A (en) * | 1986-06-30 | 1989-10-24 | Kabushiki Kaisha Toshiba | Control blade for nuclear reactor |
| JPS6345591A (en) * | 1986-08-13 | 1988-02-26 | 株式会社日立製作所 | Control rod |
| US6226066B1 (en) | 1996-01-09 | 2001-05-01 | Lg. Philips Lcd Co., Ltd. | Method for controlling pretilt angle direction in a liquid crystal cell |
| US6414737B1 (en) | 1996-01-09 | 2002-07-02 | Lg.Philips Lcd Co., Ltd. | Method for controlling pretilt angle direction in a liquid crystal cell |
| US6633355B2 (en) | 1996-01-09 | 2003-10-14 | Lg. Philips Lcd Co., Ltd. | Method for controlling pretilt angle direction in a liquid crystal cell |
| US7145618B2 (en) | 1996-01-09 | 2006-12-05 | Lg.Philips Lcd Co., Ltd | Method for controlling pretilt angle direction in a liquid crystal cell |
| WO2019123605A1 (en) * | 2017-12-21 | 2019-06-27 | 日立Ｇｅニュークリア・エナジー株式会社 | Control rod and method for cutting used control rod |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH021277B2 (en) | 1990-01-10 |
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