JPS6184592A - Fuel support fitting and positioning mechanism of guide tubeof control rod - Google Patents
Fuel support fitting and positioning mechanism of guide tubeof control rodInfo
- Publication number
- JPS6184592A JPS6184592A JP59205548A JP20554884A JPS6184592A JP S6184592 A JPS6184592 A JP S6184592A JP 59205548 A JP59205548 A JP 59205548A JP 20554884 A JP20554884 A JP 20554884A JP S6184592 A JPS6184592 A JP S6184592A
- Authority
- JP
- Japan
- Prior art keywords
- control rod
- rod guide
- fuel support
- support fitting
- positioning mechanism
- 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
(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】
［発明の技術分野］
本発明は沸騰水型原子炉において、燃料支持金具と１Ｉ
Ｉｌ ［０棒案内管とを炉心支持板に位置決め固定する
燃料支持金具および制御棒案内管の位置決め機構に関す
る。Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a boiling water nuclear reactor in which fuel support fittings and
This invention relates to a fuel support fitting and a control rod guide tube positioning mechanism for positioning and fixing a control rod guide tube to a core support plate.
［発明の技術的前頭とその問題点］
一般に？７１１ｇ水型原子炉では、第３図に示すように
、燃料集合体１の上部を格子板２により支持するととも
に、燃料集合体１の下端に取付けた燃料支持金具３を炉
心支持板４に位置決め固定することが行われている。さ
らに燃料集合体１の間を上下動する制御棒５を案内する
制御棒案内管６は、その上部を炉心支持板４に挿入固定
されている。[Technical aspects of inventions and their problems] In general? In the 711g water reactor, as shown in FIG. 3, the upper part of the fuel assembly 1 is supported by the grid plate 2, and the fuel support fitting 3 attached to the lower end of the fuel assembly 1 is positioned on the core support plate 4. It is being fixed. Further, a control rod guide tube 6 that guides the control rod 5 moving up and down between the fuel assemblies 1 has its upper portion inserted and fixed into the core support plate 4.
また、燃料支持金具３と制御棒案内管６どは、こ 。Also, the fuel support fittings 3 and control rod guide tubes 6, etc.
れらにそれぞれ配設されるオリフィス７．８を通して燃
料集合体１に冷却材を送り込む必要があり、また、制御
棒案内管６の下端に連接されるサーマルスリーブ９の離
脱を防止するため、燃料支持金具３および制御棒案内管
６はそれぞれ回転を阻止する必要がある。It is necessary to feed coolant into the fuel assembly 1 through orifices 7.8 provided in each of these, and in order to prevent the thermal sleeve 9 connected to the lower end of the control rod guide tube 6 from detaching, the fuel The support fitting 3 and the control rod guide tube 6 must each be prevented from rotating.
そこで従来、炉心支持板４に位置決めピン１０を植設固
定しておき、燃料支持金具３の上端側面および制御棒案
内管６の上端にそれぞれ突起部１１．１２を形成し、こ
の突起部１１．１２に形成される透孔に位置決めピン１
０を挿入することにより燃料支持金具３および制御棒案
内管６を位置決め固定することが行われている。Conventionally, a positioning pin 10 is implanted and fixed in the core support plate 4, and protrusions 11 and 12 are formed on the upper end side surface of the fuel support fitting 3 and the upper end of the control rod guide tube 6, respectively. Insert the positioning pin 1 into the through hole formed in 12.
0, the fuel support fitting 3 and control rod guide tube 6 are positioned and fixed.
しかしながら、以上のように構成された燃料支持金具お
よび制御棒案内管の位置決め機構では、何らかの原因に
より位置決めピン１ｏが曲がったり破損したりした場合
には位置決めピン１０は炉心支持板４に、例えば溶接等
により強固に固着されているため、手直しや交換が非常
に困難であり、大掛かりな復旧工事が必要とされるとい
う問題があった。However, in the fuel support fitting and control rod guide tube positioning mechanism configured as described above, if the positioning pin 1o is bent or damaged for some reason, the positioning pin 10 is attached to the core support plate 4 by, for example, welding. The problem is that it is very difficult to repair or replace the parts because they are firmly fixed by the metal parts, etc., and large-scale restoration work is required.
〔発明の目的１
本発明はかかる従来の事情に対処してなされたもので、
位置決めピンが曲がったり破損したりした場合に位置決
めピンを容易に交換することがぐきる燃料支持金具およ
び制御棒案内管の位置決め機構を提供しようとするもの
である。[Object of the invention 1 The present invention has been made in response to such conventional circumstances,
It is an object of the present invention to provide a positioning mechanism for a fuel support fitting and a control rod guide tube in which the positioning pin can be easily replaced when the positioning pin is bent or damaged.
［発明の概要コ
寸なわち本発明は、炉心支持板に取付けた位置決めピン
により燃料支持金具および制御棒案内管を位置決め固定
する燃料支持金具および制ｉａＯ棒案内管の位置決め機
構において、前記位置決めピンを前記炉心支持板に対し
取付け、取外し自在としたことを特徴とする燃料支持金
具および制御棒案内管の位置決め機構である。[Summary of the Invention] In other words, the present invention provides a positioning mechanism for a fuel support fitting and a control rod guide tube in which a fuel support fitting and a control rod guide tube are positioned and fixed by a positioning pin attached to a core support plate. A positioning mechanism for a fuel support fitting and a control rod guide tube, characterized in that the fuel support fitting and control rod guide tube can be attached to and removed from the core support plate.
［発明の実施例］
以下本発明の詳細を図面に示す実施例について説明する
。[Embodiments of the Invention] Details of the present invention will be described below with reference to embodiments shown in the drawings.
第１図は本発明の燃料支持金具および制御棒案内管の位
置決め機構の一実施例を示すもので、この実施例では位
置決めピン１５は中間部に炉心支持板４の上面に当接さ
れる鍔１６を備えている。FIG. 1 shows an embodiment of the fuel support fitting and control rod guide tube positioning mechanism of the present invention. In this embodiment, the positioning pin 15 is attached to the flange which is in contact with the upper surface of the core support plate 4 in the middle part. It is equipped with 16.
また、位置決めピン１５の下端は大径とされ、この大径
部２０には軸方向に複数のスリット１７が形成されてい
る。また、下端にはテーパ一部１８が形成されている。Further, the lower end of the positioning pin 15 has a large diameter, and a plurality of slits 17 are formed in the large diameter portion 20 in the axial direction. Further, a tapered portion 18 is formed at the lower end.
さらに位置決めピン１５の鍔１６の上部には遠隔作業用
の溝１９が形成され、また上端にはテーパ一部２０が形
成されている。Furthermore, a groove 19 for remote operation is formed in the upper part of the collar 16 of the positioning pin 15, and a tapered part 20 is formed in the upper end.
以上のように構成された位置決めピン１５は、溝１９を
利用しての遠隔操作により炉心支持板４の上方から炉心
支持板４に形成される貫通穴４ａに、鍔１６が炉心支持
板４の上面に当接するまで挿入される。In the positioning pin 15 configured as described above, the collar 16 is inserted into the through hole 4a formed in the core support plate 4 from above the core support plate 4 by remote control using the groove 19. It is inserted until it touches the top surface.
すなわち、位置決めピン１５の挿入時には位置決めピン
１５の下端がそのスリット１７の作用により縮径するた
め貫通孔４ａ内に容易に挿入可能であるが、挿入後にお
いては大径部２０が元の状態に復帰するため、通常状態
においては位置決めピン１５の上方への扱けは完全に阻
止される。なお、位置決めピン１５を抜くためには、位
置決めピン１５を予め定められた一定値以上の力により
上方へ引き（友く必要がある。That is, when the positioning pin 15 is inserted, the lower end of the positioning pin 15 is reduced in diameter by the action of the slit 17, so that it can be easily inserted into the through hole 4a, but after insertion, the large diameter portion 20 returns to its original state. In order to return to its original position, the positioning pin 15 is completely prevented from being moved upward in the normal state. In order to remove the positioning pin 15, it is necessary to pull the positioning pin 15 upward with a force greater than a predetermined value.
第２図は本発明の燃料支持金具および制ｉａｌ］棒案内
管の位置決め機構の他の実施例を示すものて、この実施
例では位置決めピン２１の下部には径方向に市より穴２
２が形成されている。この止まり穴２２内にはスプリン
グ２３とボール２４とが順次挿入されている。イして止
まり穴２２の開口部はボール２４の抜け防止のため、か
しめられている。Fig. 2 shows another embodiment of the positioning mechanism for the fuel support fitting and control rod guide tube of the present invention.
2 is formed. A spring 23 and a ball 24 are sequentially inserted into this blind hole 22. The opening of the blind hole 22 is caulked to prevent the ball 24 from coming off.
このような位置決めピン２１は、第１図に示した位置決
めピン１５と同様に溝１つを保持することにより遠隔操
作により炉心支持板４の目通孔４ａに挿入される。Similar to the positioning pin 15 shown in FIG. 1, such a positioning pin 21 is inserted into the through hole 4a of the core support plate 4 by remote control by holding one groove.
寸なわら、位置決めピン２１を下方へ押圧づることによ
りボール２４がスプリング２３の力に抗して内方へ押圧
され、この状態で回通孔４ａに挿入された後、貫通孔４
ａを出たところでボール２４はスプリング２３の力によ
り付勢され外方へ突出する。However, by pressing the positioning pin 21 downward, the ball 24 is pressed inward against the force of the spring 23, and after being inserted into the circulation hole 4a in this state, the ball 24 is inserted into the circulation hole 4a.
When the ball 24 exits the point a, it is urged by the force of the spring 23 and protrudes outward.
これにより通常時における位置決めピン２１のロ通孔４
ａからの汰けはほぼ完全に防止される。This allows the positioning pin 21 to pass through the hole 4 during normal operation.
The dropout from a is almost completely prevented.
位置決めピン２１の貫通孔４ａからの取出し時には、位
置決めピン２１に予め定められた一定＋ａ以上の力を加
えることにより位置決めピン２１を容易に引き扱くこと
ができる。When removing the positioning pin 21 from the through hole 4a, the positioning pin 21 can be easily handled by applying a force equal to or greater than a predetermined constant +a to the positioning pin 21.
［発明の効果］
以上述べたように本発明の燃料支持金具および制御棒案
内管の位置決め機構では、位置決めピンを炉心支持板に
対し、取付け、取外し自在としたので、位置決めピンが
曲がったりあるいは掻傷を受けた場合には、位置決めピ
ンを取外し新しいものに交換することにより容易に原子
炉の復旧を行なうことができる。[Effects of the Invention] As described above, in the fuel support fitting and control rod guide tube positioning mechanism of the present invention, the positioning pin can be attached to and removed from the core support plate, so that the positioning pin is not bent or scratched. If damaged, the reactor can be easily restored by removing the positioning pin and replacing it with a new one.
これにより原子炉の稼動率を向上することができ、また
復旧時における作業員の放射線被曝を低減することがで
きる。This can improve the operating rate of the nuclear reactor and reduce radiation exposure of workers during restoration.
第１図は本発明の燃料支持金具および制御棒案内管の位
置決め機構の一実施例を示す！ａ断面図、第２図は燃料
支持金具および制御棒案内管の位置決め機構の他の実施
例を示す縦断面図、第３図は従来の燃料支持金具および
制御棒案内管の位置決め機構を示す縦断面図である。
３・・・・・・・・・・・・燃料支持金具４・・・・・
・・・・・・・炉心支持板６・・・・・・・・・・・・
制御棒案内管１０．１５．２１・・・位置決めピン
２３・・・・・・・・・・・・止まり穴代理人弁理士
則 近 憲 佑
（ほか１名）
第１図
第２図FIG. 1 shows an embodiment of the fuel support fitting and control rod guide tube positioning mechanism of the present invention! 2 is a longitudinal sectional view showing another embodiment of a positioning mechanism for fuel support fittings and control rod guide tubes, and FIG. 3 is a longitudinal sectional view showing a conventional positioning mechanism for fuel support fittings and control rod guide tubes. It is a front view. 3...Fuel support fitting 4...
・・・・・・Core support plate 6・・・・・・・・・・・・
Control rod guide tube 10.15.21...Positioning pin 23...Blind hole agent patent attorney
Noriyuki Chika (and 1 other person) Figure 1 Figure 2
Claims (3)
持金具および制御棒案内管を位置決め固定する燃料支持
金具および制御棒案内管の位置決め機構において、前記
位置決めピンを前記炉心支持板に対し取付け、取外し自
在としたことを特徴とする燃料支持金具および制御棒案
内管の位置決め機構。(1) In a positioning mechanism for fuel support fittings and control rod guide tubes in which the fuel support fittings and control rod guide tubes are positioned and fixed by positioning pins attached to the core support plate, the positioning pins are attached to and removed from the core support plate. A positioning mechanism for a fuel support fitting and a control rod guide tube, which is characterized by being flexible.
端を大径とされ、この大径部には軸方向に複数のスリッ
トが形成されている特許請求の範囲第１項記載の燃料支
持金具および制御棒案内管の位置決め機構。(2) The fuel support fitting according to claim 1, wherein the positioning pin has a flange in the middle portion and has a large diameter at the lower end, and a plurality of slits are formed in the large diameter portion in the axial direction. and control rod guide tube positioning mechanism.
部に径方向に止まり穴が形成され、この止まり穴内には
スプリングとボールとが順に挿入され、かつ前記止まり
穴の開口部が前記ボールの抜け防止のためかしめられて
いる特許請求の範囲第１項記載の燃料支持金具および制
御棒案内管の位置決め機構。(3) The positioning pin is provided with a flange in the middle part, and a blind hole is formed in the lower part in the radial direction, and a spring and a ball are inserted in this order in this blind hole, and the opening of the blind hole is the same as that of the ball. The fuel support fitting and control rod guide tube positioning mechanism according to claim 1, wherein the fuel support fitting and control rod guide tube are caulked to prevent them from coming off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59205548A JPS6184592A (en) | 1984-10-02 | 1984-10-02 | Fuel support fitting and positioning mechanism of guide tubeof control rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59205548A JPS6184592A (en) | 1984-10-02 | 1984-10-02 | Fuel support fitting and positioning mechanism of guide tubeof control rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6184592A true JPS6184592A (en) | 1986-04-30 |
Family
ID=16508711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59205548A Pending JPS6184592A (en) | 1984-10-02 | 1984-10-02 | Fuel support fitting and positioning mechanism of guide tubeof control rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6184592A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006313145A (en) * | 2005-05-02 | 2006-11-16 | Westinghouse Electric Co Llc | Restricted assembly in core and reactor core |
-
1984
- 1984-10-02 JP JP59205548A patent/JPS6184592A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006313145A (en) * | 2005-05-02 | 2006-11-16 | Westinghouse Electric Co Llc | Restricted assembly in core and reactor core |
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