JPS6356958B2 - - Google Patents
Info
- Publication number
- JPS6356958B2 JPS6356958B2 JP55167422A JP16742280A JPS6356958B2 JP S6356958 B2 JPS6356958 B2 JP S6356958B2 JP 55167422 A JP55167422 A JP 55167422A JP 16742280 A JP16742280 A JP 16742280A JP S6356958 B2 JPS6356958 B2 JP S6356958B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- shaped
- absorber
- control rod
- rod
- 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
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)
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.
従来の沸騰水型原子炉用の制御棒は、第１図に
示す如く構成されている。すなわち、細長いＵ字
状断面のシース１を断面十字状のタイロツド２の
各突出脚にそれぞれ結合してウイングとし、各ウ
イング内にはステンレス鋼管内に例えばB4C等の
中性子吸収物質粉末を充填して成る中性子吸収棒
を装填してある。 A conventional control rod for a boiling water reactor is constructed as shown in FIG. That is, a sheath 1 with an elongated U-shaped cross section is connected to each protruding leg of a tie rod 2 with a cross-shaped cross section to form wings, and each wing is filled with powder of a neutron absorbing material such as B 4 C in a stainless steel tube. It is loaded with a neutron absorption rod made of
上記構成の制御棒は４箇の燃料集合体の間の空
隙に挿抜自在に設置されるものであり、ウイング
に照射される中性子束はその側縁近傍の部分にお
いて、側縁より約1.5cm位の位置から側縁に向つ
て急激に増大する。したがつてウイング側縁近傍
の吸収棒程中性子の吸収が大であり、他の部分の
吸収棒のB4Cはまだ充分残存しているのに、側縁
近傍の吸収棒のB4Cは消耗してしまい、制御棒の
寿命は側縁近傍の吸収棒寿命により定まることと
なる。 The control rod with the above configuration is installed in the gap between the four fuel assemblies so that it can be inserted and removed, and the neutron flux irradiated to the wing is approximately 1.5 cm from the side edge in the vicinity of the side edge. It increases rapidly from the position toward the side edge. Therefore, the absorber rods near the wing side edges absorb more neutrons, and although the B 4 C of the absorber rods in other parts still remains sufficiently, the B 4 C of the absorber rods near the side edges is The life of the control rod is determined by the life of the absorption rod near the side edge.
本発明は上記の事情に基づきなされたもので、
ウイング側縁近傍の吸収棒の寿命が長く、したが
つて長寿命とな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 made based on the above circumstances, and
The purpose of this invention is to obtain a control rod for a nuclear reactor, in which the life of the absorber rod near the side edge of the wing is long, and therefore, the life can be made long.
本発明においては、断面十字状のタイロツドの
各突出脚にハフニウムソリツドメタルからなる一
対の板状吸収体を固着し、これらの板状吸収体の
先端部をハフニウムソリツドメタルからなる側縁
吸収体により結合し、上記一対の板状吸収体の間
にスペーサ兼ステイフナを配設して減速材を流通
させる間隙を形成する一方、各板状吸収体に減速
材導入用の透孔を設けて前記目的を達成してい
る。 In the present invention, a pair of plate-shaped absorbers made of hafnium solid metal are fixed to each protruding leg of a tie rod having a cross-shaped cross section, and the tips of these plate-shaped absorbers are attached to side edge absorbers made of hafnium solid metal. A spacer/stiffener is disposed between the pair of plate-shaped absorbers to form a gap through which the moderator flows, and a through hole for introducing the moderator is provided in each plate-shaped absorber. The above objectives have been achieved.
以下、図面につき本発明の詳細を説明する。 The invention will be explained in detail below with reference to the drawings.
第１図と同一部分には同一符号を付した第２図
において、ウイング４は断面十字状のタイロツド
２の各突出部の両面に２枚の板状吸収体５が固着
され、これらの板状吸収体５の先端間に側縁吸収
体６が結合され、上記一対の板状吸収体５の間に
スペーサ兼ステイフナ７が配設されて減速材を流
通させる間隙８が形成される一方、各板状吸収体
５に減速材導入用の複数個の透孔（図示しない）
が設けられる。 In FIG. 2, the same parts as in FIG. A side edge absorbent body 6 is connected between the leading ends of the absorbent body 5, and a spacer/stiffener 7 is provided between the pair of plate-shaped absorbent bodies 5 to form a gap 8 through which the moderator flows. Plural through holes (not shown) for introducing a moderator into the plate-shaped absorber 5
will be provided.
上記板状吸収体５および側縁吸収体６はハフニ
ウムソリツドメタルから成る。また、スペーサ兼
ステイフナは板状吸収体５等と同一の材質として
もよい。なお、側縁吸収体６のウイング幅方向の
寸法は１cm〜1.5cm程度とする。 The plate-shaped absorbent body 5 and the side edge absorbent body 6 are made of hafnium solid metal. Further, the spacer/stiffener may be made of the same material as the plate-shaped absorbent body 5 and the like. Note that the dimension of the side edge absorbent body 6 in the wing width direction is approximately 1 cm to 1.5 cm.
上記実施例の制御棒においては、側縁近傍の上
昇した中性子束は側縁吸収体６により吸収される
ので、制御棒の寿命を延長することができる。 In the control rod of the above embodiment, the increased neutron flux near the side edge is absorbed by the side edge absorber 6, so that the life of the control rod can be extended.
上記の実施例において、ウイング４は長寿命中
性子吸収体であるハフニウムソリツドメタルで構
成され、ウイング４の面は従来の制御棒の中性子
吸収棒３より燃料集合体に近接しているため、反
応度が大きくなり板状吸収体５は効率よく中性子
を捕捉吸収する。また、ウイング４内には板状吸
収体５に設けた透孔から減速材が侵入し、一方の
板状吸収体５で吸収されなかつた中性子は、ウイ
ング４内の減速材により減速されて両方の板状吸
収体５の対向する面に入射し、そこで捕捉され
る。また、この実施例においては吸収棒を欠如し
ているため、その分だけ軽量化される。したがつ
て、長寿命で反応度価値が大きく、しかも軽量な
制御棒とすることができる。 In the above embodiment, the wing 4 is made of hafnium solid metal, which is a long-life neutron absorber, and the surface of the wing 4 is closer to the fuel assembly than the neutron absorber rod 3 of a conventional control rod, so it reacts. The absorber plate 5 efficiently captures and absorbs neutrons. Furthermore, a moderator enters into the wing 4 through the through hole provided in the plate-shaped absorber 5, and neutrons that are not absorbed by one of the plate-shaped absorbers 5 are moderated by the moderator in the wing 4, and both of the neutrons are The light enters the opposing surfaces of the plate-shaped absorber 5 and is captured there. Furthermore, since this embodiment lacks an absorbing rod, the weight is reduced accordingly. Therefore, it is possible to obtain a control rod that has a long life, a high reactivity value, and is lightweight.
なお、本発明は沸騰水型原子炉に限定されず、
加圧水型原子炉、重水炉等の制御棒にも適用する
ことができる。 Note that the present invention is not limited to boiling water reactors,
It can also be applied to control rods for pressurized water reactors, heavy water reactors, etc.
第１図は従来の制御棒の横断面図、第２図は本
発明の一実施例の横断面図である。
１…シース、２…タイロツド、３…中性子吸収
棒、４…ウイング、５…板状吸収体、６…側縁吸
収体、７…スペーサ兼ステイフナ、８…間隙。
FIG. 1 is a cross-sectional view of a conventional control rod, and FIG. 2 is a cross-sectional view of an embodiment of the present invention. 1... Sheath, 2... Tie rod, 3... Neutron absorption rod, 4... Wing, 5... Plate absorber, 6... Side edge absorber, 7... Spacer and stiffener, 8... Gap.
Claims (1)
ウムソリツドメタルからなる一対の板状吸収体を
固着し、これらの板状吸収体の先端部をハフニウ
ムソリツドメタルからなる側縁吸収体により結合
し、上記一対の板状吸収体の間にスペーサ兼ステ
イフナを配設して減速材を流通させる間隙を形成
する一方、各板状吸収体に減速材導入用の透孔を
設けたことを特徴とする原子炉用制御棒。 ２ スペーサ兼ステイフナはハフニウムソリツド
メタルからなる特許請求の範囲第１項記載の原子
炉用制御棒。[Claims] 1. A pair of plate-shaped absorbers made of hafnium solid metal are fixed to each protruding leg of a tie rod having a cross-shaped cross section, and the tips of these plate-shaped absorbers are attached to the side made of hafnium solid metal. A spacer/stiffener is provided between the pair of plate-shaped absorbers to form a gap through which the moderator flows, and a through hole for introducing the moderator is formed in each plate-shaped absorber. A control rod for a nuclear reactor, characterized in that it is provided with a control rod for a nuclear reactor. 2. The control rod for a nuclear reactor according to claim 1, wherein the spacer and stiffener is made of hafnium solid metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55167422A JPS5791487A (en) | 1980-11-28 | 1980-11-28 | Nuclear reactor control rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55167422A JPS5791487A (en) | 1980-11-28 | 1980-11-28 | Nuclear reactor control rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5791487A JPS5791487A (en) | 1982-06-07 |
| JPS6356958B2 true JPS6356958B2 (en) | 1988-11-09 |
Family
ID=15849399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55167422A Granted JPS5791487A (en) | 1980-11-28 | 1980-11-28 | Nuclear reactor control rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5791487A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS603584A (en) * | 1983-06-22 | 1985-01-09 | 株式会社日立製作所 | Control rod for nuclear reactor |
| SE503245C2 (en) * | 1986-06-30 | 1996-04-29 | Toshiba Kk | Control elements for use in boiling water reactor |
| US5180544A (en) * | 1986-06-30 | 1993-01-19 | Kabushiki Kaisha Toshiba | Control blade for nuclear reactor |
| SE501790C2 (en) * | 1993-09-22 | 1995-05-15 | Asea Atom Ab | Control rod for a boiler reactor where the absorber portion comprises a central channel |
| JP5376782B2 (en) * | 2007-08-31 | 2013-12-25 | 株式会社東芝 | Reactor control rod and manufacturing method thereof |
| JP2009058447A (en) * | 2007-08-31 | 2009-03-19 | Toshiba Corp | Reactor control rod |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5374697A (en) * | 1976-12-13 | 1978-07-03 | Nippon Atom Ind Group Co Ltd | Control rod |
-
1980
- 1980-11-28 JP JP55167422A patent/JPS5791487A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5791487A (en) | 1982-06-07 |
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