JPH0961576A - Control rod for boiling water reactor and its manufacture - Google Patents
Control rod for boiling water reactor and its manufactureInfo
- Publication number
- JPH0961576A JPH0961576A JP7220234A JP22023495A JPH0961576A JP H0961576 A JPH0961576 A JP H0961576A JP 7220234 A JP7220234 A JP 7220234A JP 22023495 A JP22023495 A JP 22023495A JP H0961576 A JPH0961576 A JP H0961576A
- Authority
- JP
- Japan
- Prior art keywords
- tie rod
- rod
- sheath
- boiling water
- cross
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、沸騰水型原子炉に
用いられる制御棒に係り、特に生産性の点で好適な構造
を有する沸騰水型原子炉用制御棒及びその製造方法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control rod for use in a boiling water reactor, and more particularly to a control rod for a boiling water reactor having a structure suitable for productivity and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】従来の沸騰水型原子炉用制御棒について
は、図３と図４に示すようなものがある。これによれ
ば、十字形の横断面形状を有するタイロッドの各辺の先
端部に、長手方向に長い開先が設けられた構造となって
いる。2. Description of the Related Art Conventional boiling water reactor control rods include those shown in FIGS. According to this, the tie rod having a cross-shaped cross section has a structure in which a groove long in the longitudinal direction is provided at the tip of each side.
【０００３】[0003]
【発明が解決しようとする課題】上記従来技術の制御棒
においては、開先がタイロッドの各辺の先端部の長手方
向の全長に亘って設けられているので、加工性に関し改
善する課題がある。従って、本発明の目的は、加工性が
良く生産性に優れた構造を有する制御棒及びその製造方
法を提供することにある。In the above-mentioned conventional control rod, since the groove is provided over the entire length in the longitudinal direction of the tip end portion of each side of the tie rod, there is a problem of improving workability. . Therefore, it is an object of the present invention to provide a control rod having a structure with good workability and excellent productivity, and a manufacturing method thereof.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成する沸騰
水型原子炉用制御棒は、十字形の横断面形状を有するタ
イロッドと、Ｕ字形の横断面形状を有し内部に反応度制
御材を包含するシースとを間歇部分溶接してなる沸騰水
型原子炉用制御棒において、前記タイロッドは、前記シ
ースと溶接される間歇部分に対応した部位にのみ、開先
を有するものである。A control rod for a boiling water nuclear reactor that achieves the above object comprises a tie rod having a cross-shaped cross-sectional shape and a reactivity control material having a U-shaped cross-sectional shape inside. In a boiling water nuclear reactor control rod obtained by intermittently welding a sheath including the above, the tie rod has a groove only at a portion corresponding to the intermittent portion to be welded to the sheath.
【０００５】さらに、前記タイロッドは、複数の開先を
有し、前記シースは、前記開先に対応する位置に前記開
先と同数の凸状部位を有し、該凸状部位と前記開先とが
突合わされ、間歇部分溶接されているものでも良い。Further, the tie rod has a plurality of grooves, and the sheath has the same number of convex portions as the grooves at a position corresponding to the grooves, the convex portions and the grooves. It is also possible that they are butted and are intermittently welded.
【０００６】また、上記目的を達成する沸騰水型原子炉
用制御棒の製造方法は、十字形の横断面形状を有するタ
イロッドと、Ｕ字形の横断面形状を有し内部に反応度制
御材を包含するシースとを間歇部分溶接する沸騰水型原
子炉用制御棒の製造方法において、前記タイロッドに複
数の開先を設け、前記シースに前記開先に対応する位置
に前記開先と同数の凸状部位を設け、該凸状部位と前記
開先とを突合わし間歇部分溶接するものである。Further, in a method of manufacturing a control rod for a boiling water reactor for achieving the above object, a tie rod having a cross-shaped cross section and a reactivity control material having a U-shaped cross-section are provided inside. In a method for manufacturing a boiling water reactor control rod for intermittently welding a sheath to be included, a plurality of grooves are provided in the tie rod, and the sheath has the same number of protrusions as the grooves at a position corresponding to the groove. A grooved portion is provided, and the convex portion and the groove are butted against each other and intermittent welding is performed.
【０００７】[0007]
【発明の実施の形態】以下、本発明の実施の形態につい
て、図面を参照し説明する。図１は、本発明による一実
施例の沸騰水型原子炉用制御棒の構造を示す図である。
図１に示すように、本実施例による沸騰水型原子炉用の
制御棒１は、ハンドル５及び下部支持部材８とタイロッ
ド４とを溶接で結合した骨組み構造であり、Ｕ字形の横
断面形状を有するシース６に上部反応度制御材３Uと下
部反応度制御材３Lとを包含し、ハンドル５に上部反応
度制御材３Uを吊り下げるための舌状部５’を有し、 下
部支持部材８に下部反応度制御材３Lを結合するための
舌状部８’を有した構造である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing the structure of a boiling water reactor control rod according to an embodiment of the present invention.
As shown in FIG. 1, a control rod 1 for a boiling water reactor according to this embodiment has a frame structure in which a handle 5, a lower support member 8 and a tie rod 4 are welded together, and has a U-shaped cross section. A sheath 6 having a lower reactivity control material 3U and a lower reactivity control material 3L, and a handle 5 having a tongue 5'for suspending the upper reactivity control material 3U. The structure has a tongue portion 8'for connecting the lower reactivity control material 3L.
【０００８】そして、タイロッド４に設けた複数の凹状
の形状からなる開先１２と、該開先１２に対応する位置
に開先個数と同数だけシース６に設けた凸状部位２とを
突合わせて、間歇部分溶接した構造である。また、下部
支持部材８に制御棒駆動機構装置と連結するためのコネ
クタ１０が溶接により結合された構造である。Then, a plurality of concave grooves 12 provided on the tie rod 4 and the convex portions 2 provided on the sheath 6 at the positions corresponding to the grooves 12 by the same number as the number of the grooves are butted. It is a structure that is intermittently welded. Further, the lower support member 8 has a structure in which a connector 10 for connecting to the control rod drive mechanism device is joined by welding.
【０００９】図２は、図１のＡ−Ａ断面及びＢ−Ｂ断面
を示す図である。図２(ａ)は、図１に示す制御棒の翼断
面A−Aであり、図２(ｂ)は、翼断面B−Bを示す図であ
る。FIG. 2 is a view showing an AA cross section and a BB cross section of FIG. 2A is a blade cross section AA of the control rod shown in FIG. 1, and FIG. 2B is a blade cross section BB.
【００１０】図２に示すように、翼断面A−Aは、シース
６とタイロッド４との溶接しない部位の断面であり、翼
断面B−Bは、シース６とタイロッド４とを溶接する部位
の断面である。図２(ａ)に示すように当該溶接しない部
位において、シース６とタイロッド４とは溶接されてお
らず、シース６とタイロッド４とに間隙２０がある。ま
た、タイロッド４の各辺の先端部には開先１２が設けら
れていない。一方、図２(ｂ)に示すように当該溶接する
部位において、シース６の凸状部位２は、タイロッド４
の各辺の先端部に設けられた開先１２に差し込まれ、突
合せ溶接により結合される。As shown in FIG. 2, the blade cross section A-A is a cross section of a portion where the sheath 6 and the tie rod 4 are not welded, and the blade cross section BB is a portion where the sheath 6 and the tie rod 4 are welded. It is a cross section. As shown in FIG. 2A, the sheath 6 and the tie rod 4 are not welded at the non-welded portion, and a gap 20 exists between the sheath 6 and the tie rod 4. Further, the groove 12 is not provided at the tip of each side of the tie rod 4. On the other hand, as shown in FIG. 2 (b), in the welding portion, the convex portion 2 of the sheath 6 is
Is inserted into the groove 12 provided at the tip of each side, and is joined by butt welding.
【００１１】図１及び図２から判るように、シース６の
タイロッド４と取付ける辺の凸状部位２は、長手方向に
断続的に複数箇所に有しており、タイロッド４の各辺の
先端部には、ハンドル５及びタイロッド４、ならびに、
下部支持部材８及びタイロッド４を溶接する場合に、タ
イロッド４の長手方向の寸法が変化することが回避され
る。また、シース６の凸状部位２の製作公差等を考慮し
ても溶接作業が容易となる。したがって、本発明による
制御棒の構成によれば、十字形の横断面形状を有するタ
イロッドの各辺の先端部の開先を、長手方向に複数箇所
設けたことで、開先加工工数が減ると共に、加工時のタ
イロッドの撓みに伴う製造公差の狂いが少なくなり、指
定された開先寸法に容易に加工することができ、制御棒
の生産性の向上に有効である。As can be seen from FIG. 1 and FIG. 2, the convex portions 2 of the side of the sheath 6 to be attached to the tie rod 4 are intermittently provided at a plurality of locations in the longitudinal direction, and the tip end portion of each side of the tie rod 4 is provided. Includes a handle 5 and a tie rod 4, and
When welding the lower support member 8 and the tie rod 4, it is avoided that the longitudinal dimension of the tie rod 4 changes. Further, the welding work is facilitated even in consideration of the manufacturing tolerance of the convex portion 2 of the sheath 6. Therefore, according to the configuration of the control rod according to the present invention, by providing a plurality of groove portions at the tip of each side of the tie rod having a cross-shaped cross-sectional shape in the longitudinal direction, the groove processing man-hour is reduced and The deviation of the manufacturing tolerance due to the bending of the tie rod during processing is reduced, and the specified groove dimension can be easily processed, which is effective in improving the productivity of the control rod.
【００１２】次に、具体的な寸法例について、上記のシ
ース６のタイロッド４に取付ける辺の凸状部位２と、該
凸状部位２に相対峙するようにタイロッド４の各辺の先
端部に間歇的に複数設けた開先１２とに対して、以下に
説明する。シース６のタイロッド４に取付ける辺の長手
方向に断続的に複数箇所を有する凸状部位２は、シース
６の長手方向の両端部に約７mmの位置から約１７mmの凸
状部位２が２箇所、また、両端の凸状部位２から約１２
３mmの間隔で約２７mmの凸状部位２が２３箇所、併せて
計２５箇所設けられる。そして、前述した溶接及び製作
公差の影響を考慮してこれらシース６の凸状部位２と相
対峙するように、タイロッド４の各辺の先端部に開先１
２は、タイロッド４の両端部に４０mmの開先１２が２箇
所、 また、 両端の開先１２から１００mm間隔に５０mm
の開先１２が２３箇所、併せて計２５箇所設けられる。Next, regarding specific dimensions, the convex portion 2 of the side of the sheath 6 to be attached to the tie rod 4 and the tip portion of each side of the tie rod 4 so as to face the convex portion 2 relative to each other. A plurality of grooves 12 intermittently provided will be described below. The convex portion 2 having a plurality of intermittent portions in the longitudinal direction of the side of the sheath 6 to be attached to the tie rod 4 has two convex portions 2 of about 7 mm to about 17 mm at both ends in the longitudinal direction of the sheath 6, In addition, about 12 from the convex portion 2 at both ends
23 convex portions 2 of about 27 mm are provided at intervals of 3 mm, and a total of 25 convex portions 2 are provided. Then, in consideration of the above-mentioned welding and manufacturing tolerances, the groove 1 is formed at the tip of each side of the tie rod 4 so as to face the convex portion 2 of the sheath 6.
2 has two 40 mm grooves 12 at both ends of the tie rod 4, and 50 mm at 100 mm intervals from both ends of the groove 12.
The groove 12 of 23 is provided at a total of 25 locations.
【００１３】ここで、従来の沸騰水型原子炉用制御棒に
ついて説明する。従来の沸騰水型原子炉用制御棒の構造
を図３に示し、図３のａ−ａ断面及びｂ−ｂ断面を図４
(Ａ)及び(Ｂ)に示す。図３及び図４において、沸騰水型
原子炉用の制御棒１は、十字形の横断面形状のタイロッ
ド４の各辺に、Ｕ字形の横断面形状を有するシース６を
取付け、Ｕ字形の横断面形状を有するシース６の内部に
反応度制御材３を包含し、Ｕ字形の横断面形状を有する
シース６の上部と上部反応度制御材３Uを制御棒挿入端
側に配置するハンドル５で固定し、シース６の下部と下
部支持部材８で固定し、十字形の横断面形状のタイロッ
ド４とシース６のタイロッド４に取付ける辺の長手方向
複数箇所の凸状部位２と固定した構造となっている。Now, a conventional boiling water reactor control rod will be described. The structure of a conventional boiling water reactor control rod is shown in FIG. 3, and the aa cross section and the bb cross section of FIG. 3 are shown in FIG.
Shown in (A) and (B). 3 and 4, a control rod 1 for a boiling water nuclear reactor has a tie rod 4 having a cross-shaped cross section, and a sheath 6 having a U-shaped cross-section is attached to each side of the tie rod 4 to cross the U-shaped cross section. The reactivity control material 3 is included in the sheath 6 having a surface shape, and the upper portion of the sheath 6 having a U-shaped cross section and the upper reactivity control material 3U are fixed by the handle 5 arranged on the control rod insertion end side. Then, the lower portion of the sheath 6 and the lower support member 8 are fixed, and the tie rod 4 having a cross-shaped cross section and the convex portions 2 at a plurality of longitudinal sides of the side of the sheath 6 attached to the tie rod 4 are fixed. There is.
【００１４】この従来構造の制御棒１は、十字形の横断
面形状のタイロッド４の各辺の先端部に図４に示すよう
な形状の開先１２を有し、該開先１２は、十字形の横断
面形状のタイロッド４の長手方向の全長に亘って設けら
れた構造である。また、Ｕ字形の横断面形状を有するシ
ース６は、十字形の横断面形状のタイロッド４に取付け
る辺に凸状部位２を長手方向に断続的に複数箇所に有し
ている。このＵ字形の横断面形状を有するシース６のタ
イロッド４に取付ける辺の凸状部位２と、前述した十字
形の横断面形状のタイロッド４の各辺の先端部の開先１
２とを取付け、溶接する構造としている。The control rod 1 of this conventional structure has a groove 12 having a shape as shown in FIG. 4 at the tip of each side of a tie rod 4 having a cross-shaped cross section. This is a structure provided over the entire length of the tie rod 4 having a V-shaped cross section in the longitudinal direction. Further, the sheath 6 having a U-shaped cross-sectional shape has convex portions 2 on a side to be attached to the tie rod 4 having a cross-shaped cross-sectional shape, intermittently in a plurality of positions in the longitudinal direction. The convex portion 2 of the side of the sheath 6 having the U-shaped cross section attached to the tie rod 4, and the groove 1 at the tip of each side of the above-mentioned cross-shaped tie rod 4 having the cross section.
2 is attached and welded.
【００１５】一方、本発明による実施例のように複数箇
所の開先を設けたことにより、図３と図４に示す従来の
制御棒におけるタイロッド４の開先の長手方向(制御棒
の軸方向)の長さに対し、本発明による制御棒における
開先の長手方向の長さが、開先１箇所当たりで約1/75の
長さとなる。これによって、タイロッド４の開先を加工
する場合、タイロッド４の軸方向の撓みに伴う嵌合公差
の狂いが少なくなり、すなわち、タイロッド４の撓みを
考慮することなく指定された製作寸法に開先を加工する
ことができ、製造効率の向上が図られる。なお、上記嵌
合公差とはタイロッド４とシース６との嵌合寸法であ
る。 従って、従来に比べ開先加工工数が減る
と共に、加工時のタイロッドの撓みに伴う製造公差の狂
いが少なくなり、指定された開先寸法に容易に加工する
ことができ、制御棒の生産性の向上に有効である。On the other hand, by providing a plurality of grooves as in the embodiment of the present invention, the longitudinal direction of the groove of the tie rod 4 in the conventional control rod shown in FIGS. 3 and 4 (the axial direction of the control rod). ), The length of the groove in the control rod according to the present invention in the longitudinal direction is about 1/75 per groove. As a result, when the groove of the tie rod 4 is machined, the deviation of the fitting tolerance due to the bending of the tie rod 4 in the axial direction is reduced, that is, the groove is manufactured to a specified manufacturing dimension without considering the bending of the tie rod 4. Can be processed, and manufacturing efficiency can be improved. The fitting tolerance is a fitting dimension of the tie rod 4 and the sheath 6. Therefore, the number of man-hours required for machining the groove is reduced as compared with the conventional method, and the deviation of the manufacturing tolerance caused by the bending of the tie rod during machining is reduced. It is effective for improvement.
【００１６】図５は、沸騰水型原子炉用制御棒の製造工
程の従来と本発明の比較を示す図である。図５(Ａ)は、
従来の製造工程を示す図である。図５(Ｂ)は、本発明に
よる沸騰水型原子炉用制御棒の製造工程の一実施例を示
す図である。図５を参照し、制御棒の製造工程について
説明する。図５(Ａ)に示す従来の製造工程は、（a）制
御棒を構成する各部材の材料として適切な仕様、寸法で
あるか確認する。次に（b）十字型の横断面を有するタ
イロッド４の各辺の先端部に長手方向へ全長に開先の加
工を実施する。 次に（c）タイロッド４の寸法検査を
実施し、タイロッド４が指定寸法範囲内であるならば次
の工程である（e）タイロッド４の上下端部溶接を実施
する。しかし指定寸法範囲外の場合は、（d）タイロッ
ド４の開先を手作業で再加工し、更に再度、タイロッド
４の寸法検査を実施して、次の工程である（e）タイロ
ッド４の上下端部溶接を実施する。FIG. 5 is a view showing a comparison between the conventional manufacturing method and the present invention of the manufacturing process of the boiling water reactor control rod. Figure 5 (A) shows
It is a figure which shows the conventional manufacturing process. FIG. 5 (B) is a diagram showing an embodiment of a process of manufacturing a control rod for a boiling water reactor according to the present invention. The manufacturing process of the control rod will be described with reference to FIG. In the conventional manufacturing process shown in FIG. 5A, (a) it is confirmed whether the specifications and dimensions are appropriate as the material of each member constituting the control rod. Next, (b) a groove is formed over the entire length in the longitudinal direction at the tip of each side of the tie rod 4 having a cross-shaped cross section. Next, (c) dimensional inspection of the tie rod 4 is performed, and if the tie rod 4 is within the specified dimension range, the next step (e) welding of the upper and lower ends of the tie rod 4 is performed. However, if the size is out of the specified size range, (d) the groove of the tie rod 4 is manually reprocessed, and the dimensional inspection of the tie rod 4 is performed again, and the next step is (e) the vertical movement of the tie rod 4. Perform edge welding.
【００１７】これは、制御棒挿入端側に配置するハンド
ル５及び制御棒駆動装置連結側に配置する下部支持部材
８で十字形の横断面形状のタイロッド４と溶接すること
である。次に（f）この溶接した箇所に非破壊検査を実
施し、次に（g）反応度制御材を制御棒挿入端側に配置
するハンドル４及び制御棒駆動装置連結側に配置する下
部支持部材８に組み込み、（h）反応度制御材寸法検査
を実施し、（i）Ｕ字形の横断面形状を有するシース６
においてタイロッド４に取付ける辺の凸状部位２とタイ
ロッド４の各辺の先端部に設けられた開先とを溶接し、
（j）外観検査,寸法検査及び非破壊検査を実施し、
（k）洗浄、（l）梱包する工程である。This is to weld the tie rod 4 having a cross-shaped cross section with the handle 5 arranged on the control rod insertion end side and the lower support member 8 arranged on the control rod drive device connecting side. Next, (f) non-destructive inspection is performed on the welded portion, and then (g) the handle 4 for disposing the reactivity control material on the control rod insertion end side and the lower support member for disposing on the control rod drive device coupling side. 8), (h) Reactivity control material dimensional inspection was performed, and (i) Sheath 6 having U-shaped cross section
In, welding the convex portion 2 of the side to be attached to the tie rod 4 and the groove provided at the tip of each side of the tie rod 4,
(J) Perform visual inspection, dimensional inspection and non-destructive inspection,
(K) Washing, (l) Packing process.
【００１８】図５(Ａ)に示す従来の製造工程は、前述し
た（b）工程において、タイロッド４の加工は、タイロ
ッド４の各辺の先端部に全長に開先を施す場合である。
このタイロッド４の各辺の先端部の開先加工手順はいく
つか考えられるが、例えば、タイロッド４を固定し、指
定された開先の寸法に加工するための治具を、タイロッ
ド４の開先を加工する前に位置決めしただけで、タイロ
ッド４の全長の開先加工を行うことが考えられる。しか
し該加工手順は、タイロッド４の全長が(一般に、４メ
ートル弱と)長いため、タイロッド４の軸方向のたわ
み、製造公差の影響で指定された開先寸法から外れる場
合がある。In the conventional manufacturing process shown in FIG. 5 (A), the tie rod 4 is processed in the above-mentioned step (b) when the groove is provided at the tip of each side of the tie rod 4 over the entire length.
Although there are several possible groove processing procedures for the tip of each side of the tie rod 4, for example, a jig for fixing the tie rod 4 and processing it to a specified groove size is used. It is conceivable that the groove is machined over the entire length of the tie rod 4 simply by positioning it before machining. However, in the processing procedure, since the total length of the tie rod 4 is long (generally less than 4 meters), the tie rod 4 may deviate from the designated groove dimension due to the axial deflection and manufacturing tolerances.
【００１９】また、タイロッド４の各辺の先端部の開先
を指定された寸法にするために、タイロッド４の軸方向
のたわみ、製造公差の影響等を予め考慮しながら加工す
る手順としても、寸法精度が得られ難く、指定された寸
法にするため再加工する必要がある。さらに、この全長
開先加工工程は、制御棒製作工程において大きな部分を
占めており、生産性の点で課題のある工程でもある。Also, in order to make the groove of the tip of each side of the tie rod 4 a specified dimension, the procedure of processing while considering in advance the axial deflection of the tie rod 4, the influence of manufacturing tolerances, etc. It is difficult to obtain the dimensional accuracy, and it is necessary to rework to obtain the specified dimensions. Further, this full length groove processing step occupies a large part in the control rod manufacturing step, and is also a step with a problem in terms of productivity.
【００２０】これに対し、図５(Ｂ)に示す本発明による
（b)'工程は、タイロッド４の加工において、タイロッ
ド４の各辺の先端部にシース６と溶接される間歇部分に
対応した部位にのみ、開先を有する開先加工を施す場合
である。これによって、開先加工によるタイロッド４の
軸方向のたわみ、製造公差の影響等がなくなるので、
（d）タイロッド再加工と、タイロッドを再加工した後
の（c）タイロッド寸法の再検査を必要としないものと
なる。したがって、製造効率が向上し生産性に優れた制
御棒が提供される効果が得られる。On the other hand, the step (b) 'according to the present invention shown in FIG. 5 (B) corresponds to an intermittent portion which is welded to the sheath 6 at the tip of each side of the tie rod 4 in the processing of the tie rod 4. This is a case where the groove processing having the groove is applied only to the portion. This eliminates the axial deflection of the tie rod 4 due to the groove processing, the influence of manufacturing tolerances, etc.
This eliminates the need for (d) tie rod rework and (c) tie rod dimension re-inspection after tie rod rework. Therefore, the effect of providing a control rod with improved manufacturing efficiency and excellent productivity can be obtained.
【００２１】[0021]
【発明の効果】溶接作業に対するタイロッドの撓みや製
作公差を配慮することなくタイロッドの開先加工が実施
できるようになり、製造効率が向上し生産性に優れた沸
騰水型原子炉用制御棒が提供される効果がある。[Advantages of the Invention] A control rod for a boiling water nuclear reactor, which can be grooved for tie rods without considering bending of the tie rods during welding work and manufacturing tolerances, has improved manufacturing efficiency and is excellent in productivity. There is an effect provided.
【図１】本発明による一実施例の沸騰水型原子炉用制御
棒の構造を示す図である。FIG. 1 is a view showing the structure of a boiling water reactor control rod according to an embodiment of the present invention.
【図２】図１のＡ−Ａ断面及びＢ−Ｂ断面を示す図であ
る。FIG. 2 is a diagram showing an AA cross section and a BB cross section of FIG. 1;
【図３】従来の沸騰水型原子炉用制御棒の構造を示す図
であるFIG. 3 is a view showing the structure of a conventional boiling water reactor control rod.
【図４】図３のａ−ａ断面及びｂ−ｂ断面を示す図であ
る。FIG. 4 is a diagram showing an aa cross section and a bb cross section of FIG. 3;
【図５】沸騰水型原子炉用制御棒の製造工程の従来と本
発明の比較を示す図である。FIG. 5 is a diagram showing a comparison between the conventional manufacturing process of the control rod for a boiling water reactor and the present invention.
１…制御棒、２…凸状部位、３…反応度制御材、３U…
上部反応度制御材、３L…下部反応度制御材、４…タイ
ロッド、５…ハンドル、５’,８’…舌状部、６…シー
ス、８…下部支持部材、１０…コネクタ、１２…開先、
２０…間隙1 ... Control rod, 2 ... Convex part, 3 ... Reactivity control material, 3U ...
Upper reactivity control material, 3L ... Lower reactivity control material, 4 ... Tie rod, 5 ... Handle, 5 ', 8' ... Tongue, 6 ... Sheath, 8 ... Lower support member, 10 ... Connector, 12 ... Groove ,
20 ... Gap
フロントページの続き (72)発明者 石崎 英昭 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所日立工場内 (72)発明者 瀬戸 武裕 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所日立工場内Front page continuation (72) Inventor Hideaki Ishizaki 3-1-1 Sachimachi, Hitachi City, Ibaraki Hitachi Ltd. Hitachi factory (72) Inventor Takehiro Seto 3-1-1, Sachimachi, Hitachi, Ibaraki Stock company Hitachi Ltd.Hitachi factory
Claims (3)
と、Ｕ字形の横断面形状を有し内部に反応度制御材を包
含するシースとを間歇部分溶接してなる沸騰水型原子炉
用制御棒において、 前記タイロッドは、前記シースと溶接される間歇部分に
対応した部位にのみ、開先を有することを特徴とする沸
騰水型原子炉用制御棒。1. A control for a boiling water reactor, comprising intermittently welding a tie rod having a cross-shaped cross-section and a sheath having a U-shaped cross-section and containing a reactivity control material inside. In the rod, the control rod for a boiling water reactor, wherein the tie rod has a groove only in a portion corresponding to an intermittent portion welded to the sheath.
と、Ｕ字形の横断面形状を有し内部に反応度制御材を包
含するシースとを間歇部分溶接してなる沸騰水型原子炉
用制御棒において、 前記タイロッドは、複数の開先を有し、前記シースは、
前記開先に対応する位置に前記開先と同数の凸状部位を
有し、該凸状部位と前記開先とが突合わされ、間歇部分
溶接されていることを特徴とする沸騰水型原子炉用制御
棒。2. A control for a boiling water reactor, which is obtained by intermittently welding a tie rod having a cross-shaped cross-sectional shape and a sheath having a U-shaped cross-sectional shape and containing a reactivity control material inside. In the rod, the tie rod has a plurality of grooves, and the sheath is
A boiling water nuclear reactor characterized in that it has the same number of convex portions as the grooves at positions corresponding to the grooves, and the convex portions and the grooves are butted against each other and intermittently welded. Control rod.
と、Ｕ字形の横断面形状を有し内部に反応度制御材を包
含するシースとを間歇部分溶接する沸騰水型原子炉用制
御棒の製造方法において、 前記タイロッドに複数の開先を設け、前記シースに前記
開先に対応する位置に前記開先と同数の凸状部位を設
け、該凸状部位と前記開先とを突合わし間歇部分溶接す
ることを特徴とする沸騰水型原子炉用制御棒の製造方
法。3. A control rod for a boiling water reactor in which a tie rod having a cross-shaped cross-section and a sheath having a U-shaped cross-section and containing a reactivity control material inside are intermittently welded. In the manufacturing method, the tie rod is provided with a plurality of grooves, the sheath is provided with the same number of convex portions as the grooves at a position corresponding to the grooves, and the convex portions and the grooves are abutted to each other to be intermittent. A method of manufacturing a boiling water reactor control rod, characterized by partial welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7220234A JPH0961576A (en) | 1995-08-29 | 1995-08-29 | Control rod for boiling water reactor and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7220234A JPH0961576A (en) | 1995-08-29 | 1995-08-29 | Control rod for boiling water reactor and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0961576A true JPH0961576A (en) | 1997-03-07 |
Family
ID=16747997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7220234A Pending JPH0961576A (en) | 1995-08-29 | 1995-08-29 | Control rod for boiling water reactor and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0961576A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6654438B1 (en) | 2000-08-30 | 2003-11-25 | Hitachi, Ltd. | Control rod for boiling water reactor, unit for control rod and production method of control rod |
| US6735266B1 (en) * | 2001-12-17 | 2004-05-11 | Hitachi, Ltd. | Control rod for boiling water reactor and method for manufacturing the same |
| JP2009041994A (en) * | 2007-08-07 | 2009-02-26 | Hitachi-Ge Nuclear Energy Ltd | Control rod for boiling water reactor |
| JP2009052967A (en) * | 2007-08-24 | 2009-03-12 | Hitachi-Ge Nuclear Energy Ltd | Control rod and method for manufacturing the same |
| JP2012068123A (en) * | 2010-09-24 | 2012-04-05 | Hitachi-Ge Nuclear Energy Ltd | Control rod lifetime evaluation method and control rod lifetime evaluation device |
-
1995
- 1995-08-29 JP JP7220234A patent/JPH0961576A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6654438B1 (en) | 2000-08-30 | 2003-11-25 | Hitachi, Ltd. | Control rod for boiling water reactor, unit for control rod and production method of control rod |
| US6735266B1 (en) * | 2001-12-17 | 2004-05-11 | Hitachi, Ltd. | Control rod for boiling water reactor and method for manufacturing the same |
| US6882696B2 (en) * | 2001-12-17 | 2005-04-19 | Hitachi, Ltd. | Control rod for boiling water reactor and method for manufacturing the same |
| JP2009041994A (en) * | 2007-08-07 | 2009-02-26 | Hitachi-Ge Nuclear Energy Ltd | Control rod for boiling water reactor |
| JP2009052967A (en) * | 2007-08-24 | 2009-03-12 | Hitachi-Ge Nuclear Energy Ltd | Control rod and method for manufacturing the same |
| JP2012068123A (en) * | 2010-09-24 | 2012-04-05 | Hitachi-Ge Nuclear Energy Ltd | Control rod lifetime evaluation method and control rod lifetime evaluation device |
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