JPS6318294A - Control rod for nuclear reactor - Google Patents
Control rod for nuclear reactorInfo
- Publication number
- JPS6318294A JPS6318294A JP61161965A JP16196586A JPS6318294A JP S6318294 A JPS6318294 A JP S6318294A JP 61161965 A JP61161965 A JP 61161965A JP 16196586 A JP16196586 A JP 16196586A JP S6318294 A JPS6318294 A JP S6318294A
- Authority
- JP
- Japan
- Prior art keywords
- control rod
- nuclear reactor
- neutron
- long
- life
- 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
- 238000010521 absorption reaction Methods 0.000 claims description 21
- 239000006096 absorbing agent Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 239000011358 absorbing material Substances 0.000 description 10
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910052580 B4C Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- Vibration Dampers (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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は普通寿命型の中性子吸収材と長寿命型の中性子
吸収材を併用した原子炉用制１ＩＩｌ俸に関する。Detailed Description of the Invention [Object of the Invention] (Industrial Field of Application) The present invention relates to a nuclear reactor system using a combination of a normal-life type neutron absorber and a long-life type neutron absorber.
（従来の技術）
原子炉用制御棒としては、横断面十字形状に配列した４
枚のブレード内部にそれぞれポロンカーバイド（８４Ｃ
）を充填した複数本の中性子吸収管をブレードの長手方
向に収納してなるものが広く使用されている。(Prior art) Nuclear reactor control rods consist of four rods arranged in a cross-shaped cross section.
Inside each blade is made of poron carbide (84C).
) filled with neutron absorption tubes housed in the longitudinal direction of the blade are widely used.
（発明が解決しようとする問題点）
しかしながら、上記のような構造の制御棒を原子炉内に
おいて使用すると、先端部および側端部が高い中性子束
に曝されるため、これらの先端部ヤ側端部に位置する中
性子吸収材が他部のそれに比べて早く劣化してしまう。(Problem to be Solved by the Invention) However, when a control rod with the above structure is used in a nuclear reactor, the tip and side ends are exposed to high neutron flux. The neutron absorbing material located at the end deteriorates faster than that at other parts.
従って、一部の中性子吸収材が劣化して寿命に達しただ
けで、大量の中性子吸収材が寿命に達しないうちにｔｉ
ｌｌ （Ｅｌ棒を廃棄しなければならないという欠点が
ある。Therefore, even if only a part of the neutron absorbing material deteriorates and reaches the end of its lifespan, a large amount of neutron absorbing material will reach the end of its lifespan.
(There is a drawback that the El rod must be discarded.
、［発明の構成］
（問題点を解決するための手段）
本発明の原子炉用制御棒はブレード内の先端部と側端部
に長寿命型中性子吸収材を配置し、残余部分にギャップ
を介して普通寿命型中性子吸収材を配置してなる原子炉
用制御棒において、前記ギャップがブレードの長手方向
に異なる位置に形成されていることを特徴とする。, [Structure of the Invention] (Means for Solving the Problems) The nuclear reactor control rod of the present invention has a long-life neutron absorber disposed at the tip and side ends of the blade, and a gap is left in the remaining part. A nuclear reactor control rod in which a normal-life neutron absorber is disposed through the control rod is characterized in that the gaps are formed at different positions in the longitudinal direction of the blade.
（作 用）
本発明の原子炉用制御棒では先端部や側端部に長寿命型
の中性子吸収材を配置しであるので、高い中性子束の照
射を受けても先端部や側端部のみが急速に劣化すること
がなく、原子炉用制御棒の長寿命化を図ることができる
。(Function) In the nuclear reactor control rod of the present invention, long-life neutron absorbing material is arranged at the tip and side ends, so even when irradiated with high neutron flux, only the tip and side ends are irradiated. The reactor control rods do not deteriorate rapidly, and the life of the reactor control rods can be extended.
また、長寿命型中性子吸収材からなる板状体と普通寿命
型中性子吸収材を充填した中性子吸収管の境界面に形成
されるギャップをジグザグ状としたので、ギャップ部分
の中性子吸収能力が極端に低下することはない。In addition, since the gap formed at the interface between the plate-like body made of long-life neutron absorbing material and the neutron absorption tube filled with normal-life neutron absorbing material is shaped like a zigzag, the neutron absorption capacity of the gap region is extremely high. There will be no decline.
（実施例） 以下、図面を参照して本発明の詳細な説明する。(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図は本発明を適用した原子炉用制御棒の実施例の一
部切欠斜視図であり、第２図はその一部を拡大して示ス
樅断面図である。FIG. 1 is a partially cutaway perspective view of an embodiment of a control rod for a nuclear reactor to which the present invention is applied, and FIG. 2 is an enlarged cross-sectional view of a portion thereof.
これらの図において、各ブレード１の先端部にはハフニ
ウム、ユーロピウム等の金属製長寿傘型中性子吸収材か
らなるロッド２が複数本（この例では３本）配列され、
また、各ブレードの先端部には同種の中性子吸収材から
なる板状体３が配置されている。各ブレード１の残余の
部分にはギャップ４を介して中性子吸収管５ａ、５ｂが
収納されている。これらの中性子吸収管にはそれぞれボ
ロンカーバイド等の普通寿命型中性子吸収材が充填され
ている。In these figures, a plurality (three in this example) of rods 2 made of metal long-lived umbrella-shaped neutron absorbing material such as hafnium or europium are arranged at the tip of each blade 1.
Furthermore, a plate-shaped body 3 made of the same type of neutron absorbing material is arranged at the tip of each blade. Neutron absorption tubes 5a and 5b are housed in the remaining portion of each blade 1 via a gap 4. Each of these neutron absorption tubes is filled with a normal-life neutron absorption material such as boron carbide.
中性子吸収管５ａ、５ｂには２種類の長さのものがあっ
て、それらは交互に隣接配置され、長尺の管５ｂの端部
は１板状体３下面のジグザグ状スリット内に嵌まり込む
。なあ、板状体３は把手６：こ適宜な方法で固定されて
いる。The neutron absorption tubes 5a and 5b have two different lengths, and they are arranged adjacent to each other alternately, and the end of the long tube 5b is fitted into a zigzag-shaped slit on the lower surface of the plate-shaped body 3. It's crowded. Incidentally, the plate-shaped body 3 is fixed to the handle 6 by an appropriate method.
上述のギャップ４は板状体３と中性子吸収管５ａ、５ｂ
間の熱膨張や中性子照射による成長を吸収すると共に、
制御棒挿入時に中性子吸収管５ａ。The above-mentioned gap 4 is between the plate-shaped body 3 and the neutron absorption tubes 5a and 5b.
In addition to absorbing growth caused by thermal expansion and neutron irradiation,
Neutron absorption tube 5a when the control rod is inserted.
５ｂに生じる機械的荷重を緩和するために必要でおる。This is necessary in order to alleviate the mechanical load generated on 5b.
本発明はこのギャップ４が長手方向に異なる位置に形成
されていることに特徴を有するものである。The present invention is characterized in that the gaps 4 are formed at different positions in the longitudinal direction.
もし、このギャップ４を第４図（ａ）に示すように長手
方向に同一位置に設けるとすれば、この部分にはブレー
ド１の幅方向にわたって、中性子吸収材がほとんど存在
しないことになり、中性子吸収能力は同図（ｂ）に示す
ように、この部分で極端に低くなってしまう。If this gap 4 is provided at the same position in the longitudinal direction as shown in FIG. As shown in the figure (b), the absorption capacity becomes extremely low in this part.
これに対し、本発明においてはギャップ４が隣接する中
性子吸収管５ａ、５ｂ毎にジグザグ状となるようにしで
あるので、第３図（ｂ）に示すように中性子吸収能力の
低下は第４図の場合よりも低く押えられる。On the other hand, in the present invention, since the gap 4 is arranged in a zigzag shape for each adjacent neutron absorption tube 5a, 5b, the neutron absorption capacity decreases as shown in FIG. It is held lower than in the case of .
なお、以上の説明では中性子吸収管として長短２種のも
のを使用し、これに対応する板状体３側のスリットも深
さを１種類としたが、それらの種類をもっと増加させる
ことにより中［朱子吸収能力の低下部分を３箇所ないし
それ以上に分散させるようにしてもよい。In the above explanation, two types of neutron absorption tubes, long and short, were used, and the corresponding slits on the plate-like body 3 side were also set to one depth, but by increasing the number of neutron absorption tubes, it is possible to [The portions where the sateen absorbing capacity is reduced may be dispersed in three or more locations.
［発明の効果］
上述のごとく本発明によれば長寿命の制御棒が得られ、
かつ長手方向の一部にＦｉ端な中性子吸収能力の低下を
きたさない制御棒が得られる。[Effects of the Invention] As described above, according to the present invention, a long-life control rod can be obtained,
In addition, a control rod that does not cause a decrease in neutron absorption capacity at the Fi end in a portion of the longitudinal direction can be obtained.
第１図は本発明の原子炉用制御棒の実施例を示す一部切
欠斜視図、第２図はその一部を拡大して示す縦断面図、
第３図は本発明の制御棒における中性子吸収能力の分布
状態を示す説明図、第４図は本発明によらない制御棒に
あける中性子吸収能力の分布状態を示す説明図である。
１・・・・・・・・・ブレード
２・・・・・・・・・長寿命型中性子吸収材製ロッド３
・・・・・・・・・長寿命型中性子吸収材製板状体４・
・・・・・・・・ギャップ
５ａ、５ｂ・・・中性子吸収管
６・・・・・・・・・把 手
第１ 巴
（ａ） （１））
第３図
第４図FIG. 1 is a partially cutaway perspective view showing an embodiment of the nuclear reactor control rod of the present invention, and FIG. 2 is a vertical sectional view showing an enlarged part of the control rod.
FIG. 3 is an explanatory diagram showing the distribution of neutron absorption capacity in a control rod according to the present invention, and FIG. 4 is an explanatory diagram showing the distribution of neutron absorption capacity in a control rod not according to the present invention. 1...Blade 2...Long-life neutron absorbing material rod 3
......Long-life neutron absorbing material plate 4.
...Gap 5a, 5b...Neutron absorption tube 6...Handle No. 1 Tomoe (a) (1)) Fig. 3 Fig. 4
Claims (2)
収材を配置し、残余部分にギャップを介して普通寿命型
中性子吸収材を配置してなる原子炉用制御棒において、
前記ギャップがブレードの長手方向に異なる位置に形成
されていることを特徴とする原子炉用制御棒。(1) In a control rod for a nuclear reactor, in which a long-life neutron absorber is arranged at the tip and side ends of the blade, and a normal-life neutron absorber is arranged in the remaining part through a gap,
A control rod for a nuclear reactor, characterized in that the gaps are formed at different positions in the longitudinal direction of the blade.
性子吸収管が交互に配置され、それらの先端と長寿命型
中性子吸収材製板状体の間に形成されたギャップがジグ
ザグ状とされていることを特徴とする特許請求の範囲第
１項記載の原子炉用制御棒。(2) Two types of neutron absorption tubes, long and short, filled with normal-life neutron absorption material are arranged alternately, and the gap formed between their tips and the plate-shaped body made of long-life neutron absorption material has a zigzag shape. A control rod for a nuclear reactor according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61161965A JPS6318294A (en) | 1986-07-11 | 1986-07-11 | Control rod for nuclear reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61161965A JPS6318294A (en) | 1986-07-11 | 1986-07-11 | Control rod for nuclear reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6318294A true JPS6318294A (en) | 1988-01-26 |
Family
ID=15745438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61161965A Pending JPS6318294A (en) | 1986-07-11 | 1986-07-11 | Control rod for nuclear reactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6318294A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008534331A (en) * | 2005-03-28 | 2008-08-28 | サンフォード エル．ピー． | Retractable writing instrument |
| JP2010214834A (en) * | 2009-03-18 | 2010-09-30 | Watanabe Kk | Eraser for marking pen |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57173788A (en) * | 1981-04-20 | 1982-10-26 | Nippon Atomic Ind Group Co | Control rod of reactor |
-
1986
- 1986-07-11 JP JP61161965A patent/JPS6318294A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57173788A (en) * | 1981-04-20 | 1982-10-26 | Nippon Atomic Ind Group Co | Control rod of reactor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008534331A (en) * | 2005-03-28 | 2008-08-28 | サンフォード エル．ピー． | Retractable writing instrument |
| JP4843021B2 (en) * | 2005-03-28 | 2011-12-21 | サンフォード エル．ピー． | Retractable writing instrument |
| JP2010214834A (en) * | 2009-03-18 | 2010-09-30 | Watanabe Kk | Eraser for marking pen |
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