JPS6327672B2 - - Google Patents
Info
- Publication number
- JPS6327672B2 JPS6327672B2 JP55012478A JP1247880A JPS6327672B2 JP S6327672 B2 JPS6327672 B2 JP S6327672B2 JP 55012478 A JP55012478 A JP 55012478A JP 1247880 A JP1247880 A JP 1247880A JP S6327672 B2 JPS6327672 B2 JP S6327672B2
- Authority
- JP
- Japan
- Prior art keywords
- end plug
- tie plate
- spacer
- fuel
- support member
- 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
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Description
【発明の詳細な説明】
本発明は、沸騰水型原子炉の燃料バンドルに関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel bundle for a boiling water nuclear reactor.
第１図は沸騰水型原子炉用燃料バンドルを示
し、複数本の燃料棒４と、燃料棒４の水平方向を
一定値以上に保持するためのスペーサ３と、スペ
ーサ３を保持するスペーサ支持部材５と、燃料棒
４及びスペーサ支持部材５を支持し、かつ、その
間隔を一定に保持する上部タイプレート１及び下
部タイプ２から構成されている。そして、スペー
サ３はスペーサ支持部材５に設けられた突起６に
より軸方向を支持されている。 FIG. 1 shows a fuel bundle for a boiling water reactor, which includes a plurality of fuel rods 4, spacers 3 for keeping the horizontal direction of the fuel rods 4 above a certain value, and a spacer support member for holding the spacers 3. 5, an upper tie plate 1 and a lower tie plate 2 that support the fuel rods 4 and spacer support members 5 and keep the spacing constant. The spacer 3 is supported in the axial direction by a protrusion 6 provided on the spacer support member 5.
第２図は従来のスペーサ支持部材５を示し、ス
ペーサ支持部材５は、中空状のジルカロイ管１０
の上下両端にそれぞれ上部端栓８、下部端栓９が
固定され、中間部分にスペーサ３を保持するため
の突起６が、軸方向に一定間隔を保つて複数個固
定されている。また、スペーサ３は第３図及び第
４図に示す如く、互に交叉してスペーサ枠７が構
成され、かつ、スペーサ支持部材５の突起６に保
持されて軸方向の位置が定められている。スペー
サ支持部材５をスペーサ枠７に取付ける際には、
第４図に示すようにスペーサ支持部材５の突起６
をスペーサ枠７の隅方向、即ち、点線位置に合致
させて挿入する。この挿入後に突起６を反時計方
向に45度回転し、実線位置に変位させてスペーサ
３をスペーサ枠７に係止させる。勿論、突起６は
スペーサ枠７に係止するように、かつ、使用時に
隣接する燃料棒４と接触しないように長さｌが選
定されている。このような構造においては、突起
６は、スペーサ支持部材５が回転するとスペーサ
枠７から離脱し、スペーサ３が上方向または下方
向に移動するおそれがある。尚、２３はスペーサ
部材である。 FIG. 2 shows a conventional spacer support member 5, which includes a hollow Zircaloy tube 10.
An upper end stopper 8 and a lower end stopper 9 are fixed to the upper and lower ends, respectively, and a plurality of protrusions 6 for holding the spacer 3 are fixed to the intermediate portion at regular intervals in the axial direction. Further, as shown in FIGS. 3 and 4, the spacers 3 cross each other to form a spacer frame 7, and are held by projections 6 of a spacer support member 5 to determine their axial positions. . When attaching the spacer support member 5 to the spacer frame 7,
As shown in FIG. 4, the protrusion 6 of the spacer support member 5
is inserted in the corner direction of the spacer frame 7, that is, in alignment with the dotted line position. After this insertion, the protrusion 6 is rotated 45 degrees counterclockwise and displaced to the solid line position to lock the spacer 3 to the spacer frame 7. Of course, the length l of the protrusion 6 is selected so that the protrusion 6 is engaged with the spacer frame 7 and does not come into contact with the adjacent fuel rods 4 during use. In such a structure, when the spacer support member 5 rotates, the protrusion 6 may separate from the spacer frame 7, and the spacer 3 may move upward or downward. Note that 23 is a spacer member.
スペーサ支持部材５には、第５図、第６図に示
す如く、上端に円形断面形状を有する上部端栓８
と、下端に四角形断面形状を有する下部端栓９と
が固定されている。そして、上部タイプレート１
及び下部タイプレート２には、それぞれの端栓に
対応して円形の穴１１、角形の穴１２が設けられ
ている。角形の穴１２と角形断面形状の下部端栓
９とは、スペーサ支持部材５が突起６によりスペ
ーサ３を保持する場合スペーサ支持部材５が回転
することがないように設けられている。そして、
穴１２は、加工を容易にするため円形の下穴１３
をあけた後四角形の穴形状とするため、最終穴形
状としては穴１２となる。 As shown in FIGS. 5 and 6, the spacer support member 5 includes an upper end plug 8 having a circular cross-sectional shape at the upper end.
and a lower end plug 9 having a rectangular cross-sectional shape are fixed to the lower end. And upper tie plate 1
The lower tie plate 2 is provided with a circular hole 11 and a square hole 12 corresponding to each end plug. The square hole 12 and the lower end plug 9 having a square cross section are provided so that the spacer support member 5 does not rotate when the spacer support member 5 holds the spacer 3 by the projection 6. and,
The hole 12 is a circular pilot hole 13 to facilitate machining.
After drilling, the hole is made into a rectangular hole shape, so the final hole shape is hole 12.
燃料バンドルは、高温高圧の原子炉条件下で使
用されるため、使用中に腐食や摩耗によつて下部
端栓９が減肉し、第６図に示す辺ａが(1)式で示す
如く、a′となるときには、上部端栓８と上部タイ
プレート１の穴１１は第５図に示す如くともに円
形であるため、スペーサ支持部材５は容易に回転
するようになる。そして、突起６がスペーサ枠７
から離脱してスペーサ３が上方向または下方向に
移動するおそれがある。 Since the fuel bundle is used under high-temperature, high-pressure reactor conditions, the lower end plug 9 becomes thinner due to corrosion and wear during use, and the side a shown in Fig. 6 becomes as shown in equation (1). , a', since the upper end plug 8 and the hole 11 of the upper tie plate 1 are both circular as shown in FIG. 5, the spacer support member 5 can be easily rotated. Then, the protrusion 6 is connected to the spacer frame 7
There is a possibility that the spacer 3 may separate from the spacer 3 and move upward or downward.
a′＜√２r1 ………(1)
但し、a′：下部端栓９の減肉後の一辺の長さ、
r1：下部タイプレート２の穴１２の下穴の半径、
但し、r1＞ｂ／２
ｂ：下部タイプレート２の穴１２の四角形穴の一
辺の長さ
このときには、下部端栓９の減肉量としては、
(1)式より、
Δt1＝ａ−a′＜ａ−√２r1 ………(2)
となるときに、スペーサ支持部材５が回転できる
ことになる。 a′＜√2r 1 ………(1) However, a′: Length of one side of lower end plug 9 after thinning, r 1 : Radius of prepared hole of hole 12 of lower tie plate 2,
However, r 1 > b/2 b: Length of one side of the square hole of the hole 12 of the lower tie plate 2 In this case, the amount of thinning of the lower end plug 9 is:
From equation (1), the spacer support member 5 can rotate when Δt 1 =a−a′<a−√2r 1 (2).
本発明の目的は、上部又は下部端栓の減肉によ
る回転を防止できると共に製作が簡単である燃料
バンドルを提供することである。 It is an object of the present invention to provide a fuel bundle that can prevent rotation due to thinning of the upper or lower end plug and is simple to manufacture.
本発明の特徴は、燃料スペーサ保持部材の上部
端栓及び下部端栓の少なくとも一方の横断面が、
円弧部と直線部で囲まれた形状を有しており、燃
料スペーサ保持部材の上部端栓及び下部端栓が挿
入される上部タイプレート及び下部タイプレート
の第２孔部の少なくとも一方の横断面が、挿入さ
れる端栓の横断面と同じ円弧部と直線部で囲まれ
た形状を有していることにある。 A feature of the present invention is that the cross section of at least one of the upper end plug and the lower end plug of the fuel spacer holding member is
A cross section of at least one of the second hole portions of the upper tie plate and the lower tie plate, which has a shape surrounded by an arcuate portion and a straight portion, and into which the upper end plug and lower end plug of the fuel spacer holding member are inserted. However, it has a shape surrounded by an arcuate portion and a straight portion that are the same as the cross section of the end plug to be inserted.
以下本発明の燃料バンドルの一実施例を従来と
同部品は同符号で示し同部分の説明は省略し、第
７図により説明する。本実施例は穴１８をほぼ半
円形（半月形）としたものである。そして、下部
端栓１７もこれに対応しほぼ半円形断面を持つよ
うに形成したものである。本実施例において、下
部端栓１７が減肉により形状が変化し、スペーサ
支持部材５が回転できるようになるのは、下部端
栓１７の寸法に(5)式及び(6)式の関係が成り立つと
きである。 Hereinafter, an embodiment of the fuel bundle of the present invention will be explained with reference to FIG. 7, with the same parts as those of the conventional fuel bundle being designated by the same reference numerals and explanations of the same parts being omitted. In this embodiment, the hole 18 is approximately semicircular (half moon shape). Correspondingly, the lower end plug 17 is also formed to have a substantially semicircular cross section. In this embodiment, the shape of the lower end plug 17 changes due to thinning and the spacer support member 5 becomes rotatable because the relationship between equations (5) and (6) for the dimensions of the lower end plug 17 is satisfied. It's time to make it happen.
√2＋2＞2r4のとき
r4＜１／２（r3＋ｃ） ………(5)
√2＋22r4のとき
ｆ＜１／２（r3−ｃ） ………(6)
ここで
但し、ｃ：第８図の穴１８の図示部寸法
ｄ：下部端栓１７の弧状部直径（第８図参照）
ｅ：第８図の下部端栓１７の図示寸法
r3：穴１８の弧状部の半径
r4：下部端栓１７の弧状部半径
下部端栓１７の寸法、ｄ，ｅ，r4及び穴１８の
寸法、r3，ｃを適切に選ぶことにより、スペーサ
支持部材５が回転できる下部端栓１７（減肉した
後の寸法がｄがd′に、また、ｅがe′に変化したと
き）、の減肉量Δt3（＝ｄ−d′、＝ｅ−e′）は従来の
下部端栓９の減肉量Δt1よりも大きくなり回動を
阻止できる。 When √ 2 + 2 > 2r 4 , r 4 < 1/2 (r 3 + c) ...... (5) When √ 2 + 2 2r 4 , f < 1/2 (r 3 - c) ...... (6 ) here However, c: Illustrated dimension of the hole 18 in FIG. 8 d: Diameter of the arcuate portion of the lower end plug 17 (see FIG. 8) e: Illustrated dimension of the lower end plug 17 in FIG. 8 r 3 : Arc shape of the hole 18 Radius r 4 : Radius of the arcuate portion of the lower end plug 17 By appropriately selecting the dimensions d, e, r 4 of the lower end plug 17 and the dimensions r 3 , c of the hole 18, the spacer support member 5 can be rotated. Thickness reduction amount Δt 3 (=d−d′,=e−e′) of the lower end plug 17 (when the dimensions after the thinning change from d to d′ and from e to e′) is larger than the amount of thinning Δt 1 of the conventional lower end plug 9, and rotation can be prevented.
更には、スペーサ支持部材５の下部端栓１５
は、円柱の一部に１つの平面からなる側面を形成
した形状を有している。即ち、軸方向に延びる下
部端栓の横断面が円弧部と直線部で囲まれた形状
になつている。このため、下部端栓１５は、円柱
状の部材の一部を平面に削るだけでよく、横断面
が三角形及び四角形の端栓に比べて製作が容易に
なる。それだけ、本実施例では燃料バンドルの製
作も簡単になる。下部端栓１５が挿入される下部
タイプレート２の穴１８の横断面も挿入される下
部端栓１５の横断面と同様に円弧部と直線部で囲
まれた形状になつている。このような穴１８の加
工も横断面が三角形及び四角形の穴の加工に比べ
て容易である。これによつても、本実施例の燃料
バンドルの製作がより簡単になる。 Furthermore, the lower end plug 15 of the spacer support member 5
has a shape in which a side surface consisting of one plane is formed on a part of a cylinder. That is, the cross section of the lower end plug extending in the axial direction has a shape surrounded by a circular arc portion and a straight portion. Therefore, the lower end plug 15 is easier to manufacture than end plugs having a triangular or square cross section by simply cutting a part of the cylindrical member into a flat surface. This embodiment also simplifies the production of the fuel bundle. The cross section of the hole 18 of the lower tie plate 2 into which the lower end plug 15 is inserted has a shape surrounded by an arcuate portion and a straight portion, similar to the cross section of the lower end plug 15 into which the lower end plug 15 is inserted. Machining such a hole 18 is also easier than machining a hole having a triangular or square cross section. This also makes it easier to manufacture the fuel bundle of this embodiment.
第８図は本発明の他の実施例を示し、前述の実
施例と異なるところは、スペーサ支持部材５の上
端に固定してある上部端栓１９と上部タイプレー
ト１との嵌合結合部の形状を第８図と同様の形状
に形成したものである。即ち、上部タイプレート
１に半円形の穴２０が設けられ、また、上部端栓
１９も穴２０貫通部分は同様の半円形に形成され
ている。従つて、例えば、スペーサ支持部材５の
下部端栓及び下部タイプレートの穴の組み合せが
第６図に示す組合せであつて、下部端栓９が使用
中減肉して下部端栓９の減肉後の一辺a′に(1)式が
成り立ち、スペーサ支持部材５の下端が回転可能
な状態となつても、上部端栓１９が容易に回転し
ない構造であるため、スペーサ支持部材５の突起
６はスペーサ枠７より離脱することなく、スペー
サ３が上方向または下方向に移動するおそれはな
くなる。 FIG. 8 shows another embodiment of the present invention, which differs from the previous embodiment in that the fitting connection between the upper end plug 19 fixed to the upper end of the spacer support member 5 and the upper tie plate 1 is different from the above-described embodiment. The shape is similar to that shown in FIG. That is, the upper tie plate 1 is provided with a semicircular hole 20, and the portion of the upper end plug 19 through which the hole 20 passes is formed in a similar semicircular shape. Therefore, for example, if the combination of the lower end plug of the spacer support member 5 and the holes of the lower tie plate is the combination shown in FIG. Equation (1) holds true for the latter side a', and even if the lower end of the spacer support member 5 becomes rotatable, the upper end plug 19 does not easily rotate, so the protrusion 6 of the spacer support member 5 does not separate from the spacer frame 7, and there is no possibility that the spacer 3 will move upward or downward.
本実施例においても、前述の実施例と同様に燃
料バンドルの製作が簡単になる。 In this embodiment as well, manufacturing of the fuel bundle is simplified as in the previous embodiment.
本発明によれば、スペーサ支持部材の端栓が減
肉してもスペーサ支持部材の回転を防止でき燃料
スペーサの上下動を阻止できると共に、燃料バン
ドルの製作を簡単に行なうことができる。 According to the present invention, even if the end plug of the spacer support member is thinned, rotation of the spacer support member can be prevented, vertical movement of the fuel spacer can be prevented, and the fuel bundle can be manufactured easily.
第１図は沸騰水型原子炉用燃料バンドルの概略
図、第２図は第１図の燃料バンドルの従来のスペ
ーサ支持部材の断面図、第３図は第２図のスペー
サ支持部材の配置部分の一部の縦断面図、第４図
は第３の底面図、第５図は第２図のスペーサ支持
部材の上部端栓と上部タイプレートとの結合部を
示し、イは平面図、ロはイの断面図、第６図は第
２図のスペーサ支持部材の下部端栓と下部タイプ
レートとの結合部を示し、イはロのハ−ニ矢印部
の断面図、ロはイの断面図、第７図は本発明の燃
料バンドルの一実施例のスペーサ支持部材の下部
端栓と下部タイプレートとの結合部を示しイはロ
のホ−ヘ矢印部の断面図、ロはイの断面図、第８
図は本発明の他の実施例におけるスペーサ支持部
材の上部端栓付近の構造図である。
１……上部タイプレート、２……下部タイプレ
ート、３……スペーサ、４……燃料棒、５……ス
ペーサ支持部材、６……突起、１４，１７……下
部端栓、１５，１８，２０，２２……穴、１９，
２１……上部端栓。
Fig. 1 is a schematic diagram of a fuel bundle for a boiling water reactor, Fig. 2 is a sectional view of a conventional spacer support member of the fuel bundle of Fig. 1, and Fig. 3 is an arrangement of the spacer support member of Fig. 2. FIG. 4 is a vertical sectional view of a portion of the spacer support member shown in FIG. 2, FIG. 6 shows the joint between the lower end plug and the lower tie plate of the spacer support member in FIG. 7A and 7B show the joint portion between the lower end plug and the lower tie plate of the spacer support member of an embodiment of the fuel bundle of the present invention, and A is a cross-sectional view of the arrowed part in B, and B is a sectional view of the arrow in A. Sectional view, No. 8
The figure is a structural diagram of the vicinity of the upper end plug of the spacer support member in another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Upper tie plate, 2... Lower tie plate, 3... Spacer, 4... Fuel rod, 5... Spacer support member, 6... Protrusion, 14, 17... Lower end plug, 15, 18, 20, 22...hole, 19,
21... Upper end plug.
Claims (1)
前記上部タイプレート及び前記下部タイプレート
に設けられた第１孔部に両端部が挿入されて保持
される複数の燃料棒と、前記燃料棒の相互間を所
定幅に保持する燃料スペーサと、前記上部タイプ
レート及び前記下部タイプレートに設けられた第
２孔部に両端部が挿入されて両端部が保持され前
記燃料棒間に配置された燃料スペーサ保持部材と
を有する燃料集合体において、前記燃料スペーサ
保持部材の上部端栓及び下部端栓の少なくとも一
方の横断面が、円弧部と直線部で囲まれた形状を
有しており、前記燃料スペーサ保持部材の上部端
栓及び下部端栓が挿入される前記上部タイプレー
ト及び前記下部タイプレートの前記第２孔部の少
なくとも一方の横断面が、挿入される前記端栓の
横断面と同じ円弧部と直線部で囲まれた形状を有
していることを特徴とする燃料バンドル。1 Upper tie plate, lower tie plate,
a plurality of fuel rods whose ends are inserted and held in first holes provided in the upper tie plate and the lower tie plate; a fuel spacer that maintains a predetermined width between the fuel rods; A fuel assembly having an upper tie plate and a fuel spacer holding member having both ends inserted into and held by second holes provided in the lower tie plate and disposed between the fuel rods. A cross section of at least one of the upper end plug and the lower end plug of the spacer holding member has a shape surrounded by an arcuate part and a straight part, and the upper end plug and the lower end plug of the fuel spacer holding member are inserted. A cross section of at least one of the second hole portions of the upper tie plate and the lower tie plate to be inserted has a shape surrounded by an arcuate portion and a straight portion that is the same as a cross section of the end plug to be inserted. A fuel bundle featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1247880A JPS56110089A (en) | 1980-02-06 | 1980-02-06 | Fuel bundle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1247880A JPS56110089A (en) | 1980-02-06 | 1980-02-06 | Fuel bundle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56110089A JPS56110089A (en) | 1981-09-01 |
| JPS6327672B2 true JPS6327672B2 (en) | 1988-06-03 |
Family
ID=11806484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1247880A Granted JPS56110089A (en) | 1980-02-06 | 1980-02-06 | Fuel bundle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56110089A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63169679U (en) * | 1987-04-27 | 1988-11-04 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE789401A (en) * | 1971-09-30 | 1973-01-15 | Gen Electric | ASSEMBLY OF FUEL BARS FOR NUCLEAR REACTORS |
| JPS5187196U (en) * | 1975-01-08 | 1976-07-13 | ||
| JPS51116398U (en) * | 1975-03-17 | 1976-09-21 |
-
1980
- 1980-02-06 JP JP1247880A patent/JPS56110089A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63169679U (en) * | 1987-04-27 | 1988-11-04 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56110089A (en) | 1981-09-01 |
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|---|---|---|
| US4056441A (en) | Bracing device for a bundle of parallel pins in a nuclear reactor assembly | |
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| EP0026029A1 (en) | Fuel assemblies for nuclear reactors | |
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| JPH0511798B2 (en) | ||
| JPS58186082A (en) | Fuel assembly | |
| JPS6327672B2 (en) | ||
| JPH0345355B2 (en) | ||
| JPS5816156B2 (en) | Nenriyo Pinno Cluster Oshijisuru Souchi | |
| GB1116811A (en) | Improvements in or relating to nuclear reactor fuel assemblies | |
| US4678630A (en) | Spacer grid insert | |
| JPS5839440Y2 (en) | nuclear fuel assembly | |
| JP2753333B2 (en) | Fuel assembly | |
| US3390053A (en) | Flexible spacer for a nuclear reactor fuel assembly | |
| US6285729B1 (en) | Fuel spacer/water rod capture apparatus and methods for boiling water nuclear reactors | |
| US3354045A (en) | Nuclear reactor fuel elements | |
| JPH0643276A (en) | Fuel assembly | |
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| JPS5816120Y2 (en) | electron tube cathode body | |
| JP3057480B2 (en) | Spacer for fuel assembly | |
| JPH055517Y2 (en) | ||
| US3342440A (en) | Support for nuclear reactor fuel elements | |
| JP2515815B2 (en) | Fuel assembly | |
| JPH052957B2 (en) |