JPS64672B2 - - Google Patents
Info
- Publication number
- JPS64672B2 JPS64672B2 JP58080746A JP8074683A JPS64672B2 JP S64672 B2 JPS64672 B2 JP S64672B2 JP 58080746 A JP58080746 A JP 58080746A JP 8074683 A JP8074683 A JP 8074683A JP S64672 B2 JPS64672 B2 JP S64672B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- cylindrical body
- spacer
- protrusion
- independent cell
- 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
- Fuel-Injection Apparatus (AREA)
- Fuel Cell (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、燃料スペーサに係り、特に燃料棒及
び中空棒の径に係わらず組込み可能な独立セル型
スペーサに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a fuel spacer, and particularly to an independent cell spacer that can be incorporated into fuel rods and hollow rods regardless of their diameter.
第１図に沸騰水型原子炉に使用する燃料集合体
例を示す。第１図において１は上部タイプレー
ト、２は下部タイプレート、３はスペーサ、４は
燃料棒、５はスペーサ支持ロツド、６は係合突起
である。第１図において、複数の燃料棒４はスペ
ーサ３により水平方向間隔を一定に保持され、ス
ペーサ３はスペーサ支持ロツド５に設けられた係
合突起６により軸方向に一定間隔に保持されてい
る。また上部タイプレート１および下部タイプレ
ート２は、燃料棒４およびスペーサ支持ロツド５
を支持しその間隔を一定に保持している。
Figure 1 shows an example of a fuel assembly used in a boiling water reactor. In FIG. 1, 1 is an upper tie plate, 2 is a lower tie plate, 3 is a spacer, 4 is a fuel rod, 5 is a spacer support rod, and 6 is an engaging protrusion. In FIG. 1, a plurality of fuel rods 4 are held at constant intervals in the horizontal direction by spacers 3, and the spacers 3 are held at constant intervals in the axial direction by engagement protrusions 6 provided on spacer support rods 5. Further, the upper tie plate 1 and the lower tie plate 2 are connected to the fuel rods 4 and the spacer support rods 5.
is supported and their spacing is kept constant.
第２図に丸形、第３図に８角形の独立セルから
なるスペーサ３の構造例を示す。第２図、第３図
において、４は燃料棒、５はスペーサ支持ロツ
ド、７は突起、８は縦板バネ、９は丸形独立セ
ル、１０は８角形独立セル、１１はサイドバンド
である。第２図、第３図において燃料棒４、スペ
ーサ支持ロツド５は独立セル９あるいは１０に挿
入され突起７および縦板バネ８により支持されて
いて、格子状に結合された独立セルの外周にはサ
イドバンド１１が置かれている。 FIG. 2 shows an example of the structure of a spacer 3 consisting of round independent cells, and FIG. 3 an octagonal independent cell. In Figures 2 and 3, 4 is a fuel rod, 5 is a spacer support rod, 7 is a protrusion, 8 is a vertical plate spring, 9 is a round independent cell, 10 is an octagonal independent cell, and 11 is a side band. . In FIGS. 2 and 3, fuel rods 4 and spacer support rods 5 are inserted into independent cells 9 or 10 and supported by protrusions 7 and vertical plate springs 8. A side band 11 is placed.
以上の構造を有するスペーサにおいては、燃料
棒４とスペーサ支持ロツド５は同外径である必要
があり、燃料棒よりスペーサ支持ロツドの外径が
大きいタイプの燃料には適用できない。 In the spacer having the above structure, the fuel rods 4 and the spacer support rods 5 must have the same outer diameter, and cannot be applied to a type of fuel in which the outer diameter of the spacer support rods is larger than that of the fuel rods.
本発明の目的は、外径の異なる燃料棒及びスペ
ーサ支持ロツドを有する燃料集合体に適用できる
燃料スペーサを提供することにある。
An object of the present invention is to provide a fuel spacer that can be applied to fuel assemblies having fuel rods and spacer support rods of different outer diameters.
本発明の特徴は、スペーサ支持ロツドが内部に
挿入される第２筒状体の外周に沿つて配置された
スプリング部材が、第２筒状体に隣接してしかも
内部に燃料棒が挿入される２つの第１筒液状に取
付けられ、スプリング部材は第２筒状体の側壁に
設けられた開口から第２筒状体内に突出してスペ
ーサ支持ロツドを支持する第２突起部を有し、第
２筒状体の内面から第２突起部のスペーサ支持ロ
ツド接触部までの高さが、第１筒状体の内面か
ら、第１筒状体内に突出して燃料棒を支持する第
１突起部の燃料棒接触部までの高さよりも低くし
たことにある。
A feature of the present invention is that a spring member disposed along the outer periphery of the second cylindrical body into which the spacer support rod is inserted is adjacent to the second cylindrical body and into which the fuel rod is inserted. The spring member has a second protrusion projecting into the second tubular body from an opening provided in a side wall of the second tubular body to support the spacer support rod; The height from the inner surface of the cylindrical body to the spacer support rod contact portion of the second protrusion is the fuel of the first protrusion that protrudes from the inner surface of the first cylindrical body into the first cylindrical body and supports the fuel rod. This is because the height is lower than the height to the rod contact area.
以下、本発明の具体的な実施例を図面を用いて
説明する。
Hereinafter, specific embodiments of the present invention will be described using the drawings.
実施例 １
第４図および第５図に本発明の実施例を示す。
第４図および第５図において、独立分離型スプリ
ング部材１３は丸形独立セル９の外周に沿つて取
付けられ、この独立分離型スプリング部材１３の
突起１４は丸形独立セル９の側面の開口部１６よ
り突出している。燃料棒４及び太径のスペーサ支
持ロツド１２は、挿入された丸形独立セル９の外
周に沿つて取付けられた独立分離型スプリング部
材１３の突起１４により少なくとも１方向より押
圧され、丸形独立セル９の適正位置に保持され
る。Example 1 An example of the present invention is shown in FIGS. 4 and 5.
In FIGS. 4 and 5, the independent spring member 13 is attached along the outer periphery of the round independent cell 9, and the protrusion 14 of the independent spring member 13 is located at the opening on the side of the round independent cell 9. It stands out from 16. The fuel rods 4 and the large diameter spacer support rods 12 are pressed from at least one direction by the protrusions 14 of the independent spring members 13 attached along the outer periphery of the inserted round independent cells 9. 9 is held in the proper position.
第４図および第５図に示すように独立分離型ス
プリング部材１３は、これを外周に取付ける場合
は、隣接する丸形独立セル９の上部および下部の
切れ込み１７と独立分離型スプリング部材１３の
上部および下部の係合部１５とを嵌合した後、丸
形独立セル９の外周に沿つて取付けられ、係止さ
れる。 As shown in FIGS. 4 and 5, when the independent spring member 13 is attached to the outer periphery, the upper and lower notches 17 of the adjacent round independent cells 9 and the upper part of the independent spring member 13 After fitting with the lower engaging portion 15, it is attached along the outer periphery of the round independent cell 9 and locked.
このように独立分離型スプリング部材１３は、
丸形独立セル９に確実に係止され、独立分離型ス
プリング部材の突起１４は、燃料棒４およびスペ
ーサ支持ロツド１２を丸形独立セル９の適正位置
に保持するに十分な押圧を与えることができる。 In this way, the independently separable spring member 13 is
Securely latched to the round independent cell 9, the projections 14 of the separate spring members provide sufficient pressure to hold the fuel rods 4 and spacer support rods 12 in position in the round independent cell 9. can.
スペーサ支持ロツド１２が挿入される丸形独立
セル９の外面に沿つて配置された独立分離型スプ
リング部材１３において、その丸形独立セル９の
内面からその独立分離型スプリング部材１３の突
起１４のスペーサ支持ロツト接触部までの高さを
ｈとする。また、燃料棒４が挿入される丸形独立
セル９の外面に沿つて配置された独立分離型スプ
リング部材１３において、その丸形独立セル９の
内面からその独立分離型スプリング部材１３の突
起１４の燃料棒接触部までの高さをＨとする。第
５図に示されるように、本実施例の燃料スペーサ
は、高さｈが高さＨよりも低くなつている。 In the independent spring member 13 disposed along the outer surface of the round independent cell 9 into which the spacer support rod 12 is inserted, the spacer of the protrusion 14 of the independent spring member 13 extends from the inner surface of the round independent cell 9. Let h be the height to the support rod contact part. Furthermore, in the independent spring member 13 disposed along the outer surface of the round independent cell 9 into which the fuel rod 4 is inserted, the protrusion 14 of the independent spring member 13 extends from the inner surface of the round independent cell 9. Let H be the height to the fuel rod contact part. As shown in FIG. 5, the height h of the fuel spacer of this embodiment is lower than the height H.
本実施例は以上のように構成されており、従来
挿入が不可能であつた太径のスペーサ支持ロツド
の挿入が可能になる。スペーサ支持ロツド１２は
一般的に水ロツドとして機能しているので、太径
のスペーサ支持ロツド１２の挿入可能によつて燃
料集合体中央部での中性子の減速効果が増大す
る。独立分離型スプリング部材１３は、丸形独立
セル９内に設置した場合には丸形独立セル９内の
冷却水流路を狭くするので、丸形独立セル９の外
側に設置したほうがよい。 This embodiment is constructed as described above, and it becomes possible to insert a large diameter spacer support rod, which was previously impossible to insert. Since the spacer support rods 12 generally function as water rods, the ability to insert the large diameter spacer support rods 12 increases the neutron moderation effect at the center of the fuel assembly. If the independent spring member 13 is installed inside the round independent cell 9, the cooling water flow path inside the round independent cell 9 will be narrowed, so it is better to install it outside the round independent cell 9.
実施例 ２
第６図および第７図において、独立分離型スペ
リング部材１３は８角形独立セル１０の外周に沿
つて取付けられ、かつ取付けられた８角形独立セ
ル１０に隣接する８角形独立セル１０の上部およ
び下部で係合され、独立分離型スプリング部材１
３の突起１４は８角形独立セルの側面の開口部１
６より突出している。燃料棒４および太径のスペ
ーサ支持ロツド１２は、挿入された８角形独立セ
ル１０の外周に沿つて取付けられた独立分離型ス
プリング部材１３の突起１４により少なくとも１
方向より押圧され、８角形独立セル１０の適正位
置に保持される。本実施例も、前述の実施例と同
様に高さｈが高さＨよりも低くなつている。Embodiment 2 In FIGS. 6 and 7, the independently separated spelling member 13 is attached along the outer periphery of the octagonal independent cell 10, and is attached to the octagonal independent cell 10 adjacent to the attached octagonal independent cell 10. an independently separable spring member 1 engaged at the upper and lower parts;
3 is the opening 1 on the side of the octagonal independent cell.
It stands out from 6. The fuel rods 4 and the large diameter spacer support rods 12 are supported at least once by the protrusions 14 of the independent spring members 13 attached along the outer periphery of the inserted octagonal independent cells 10.
The octagonal independent cell 10 is held in a proper position by being pressed from the direction. In this embodiment as well, the height h is smaller than the height H, similar to the previous embodiment.
本実施例は、以上のように構成されており、実
施例１と同様な効果を得ることができる。 The present embodiment is configured as described above, and the same effects as in the first embodiment can be obtained.
実施例 ３
第８図および第９図に本発明の第３の実施例を
示す。Embodiment 3 A third embodiment of the present invention is shown in FIGS. 8 and 9.
第８図および第９図において、独立分離型スプ
リング部材１３は太径のスペーサ支持ロツド１２
が挿入される丸形独立セル９の外周に沿つて取付
けられ、かつ取付けられた丸形独立セル９に隣接
する燃料棒の丸形独立セル９の上部および下部で
係合され、独立分離型スプリング部材１３の突起
１４は丸形独立セルの側面の開口部１６より突出
している。太径のスペーサ支持ロツド１２は、挿
入される丸形独立セル９の外周に沿つて取付けら
れた独立分離型スプリング部材１３の突起１４に
より４方向より押圧され、丸形独立セル９の適正
位置に保持される。 In FIGS. 8 and 9, the independently separable spring member 13 is attached to a large diameter spacer support rod 12.
is attached along the outer periphery of the round independent cell 9 into which the fuel rod is inserted, and is engaged at the upper and lower portions of the round independent cell 9 of the fuel rod adjacent to the attached round independent cell 9. The protrusion 14 of the member 13 protrudes from the opening 16 in the side of the round independent cell. The large diameter spacer support rod 12 is pressed from four directions by the projections 14 of the independent spring member 13 attached along the outer periphery of the round independent cell 9 to be inserted, and is held in the proper position of the round independent cell 9. Retained.
燃料棒４は、丸形独立セル９の内面の突起７と
縦板バネ８により保持される。 The fuel rod 4 is held by a projection 7 on the inner surface of a round independent cell 9 and a vertical leaf spring 8.
縦板バネ８における丸形独立セル９の内面から
燃料棒接触部までの高さを、H1とする。突起７
におけるその高さも、実質的にH1に等しい。第
８図及び第９図に示されたように、本実施例の燃
料スペーサは、高さｈが高さH1よりも低くなつ
ている。 The height from the inner surface of the round independent cell 9 to the fuel rod contact portion in the vertical leaf spring 8 is defined as H 1 . Protrusion 7
Its height at is also substantially equal to H 1 . As shown in FIGS. 8 and 9, the height h of the fuel spacer of this embodiment is lower than the height H1 .
本実施例は以上のように構成されており、実施
例１および実施例２と同様な効果を得ることがで
きる。 The present embodiment is configured as described above, and the same effects as in the first and second embodiments can be obtained.
実施例１〜３は、上記の如く独立セル型スペー
サにおいて、全独立セル、あるいは外径の異なる
燃料棒、スペーサ支持ロツドおよび中空棒が挿入
される独立セルの沿つて独立分離型スプリング部
材を配置し、これにより燃料棒、スペーサ支持ロ
ツドおよび中空棒を押圧支持する構造とすること
により、外径の異なる燃料棒、スペーサ支持ロツ
ドおよび中空棒の独立セルへの装置を可能にした
ものであり、独立セル型スペーサを外径の異なる
燃料棒、スペーサ支持ロツドおよび中空棒を有す
る燃料集合体に適用可能としたものである。 In Examples 1 to 3, in the independent cell type spacer as described above, independently separated spring members are arranged along all the independent cells or the independent cells into which fuel rods with different outer diameters, spacer support rods, and hollow rods are inserted. However, by creating a structure that presses and supports the fuel rods, spacer support rods, and hollow rods, it is possible to install fuel rods, spacer support rods, and hollow rods with different outer diameters into independent cells. The independent cell spacer can be applied to fuel assemblies having fuel rods with different outer diameters, spacer support rods, and hollow rods.
本発明によれば、独立セル型スペーサを外径の
異なる燃料棒、スペーサ支持ロツドおよび中空棒
を有する燃料集合体に適用することが可能とな
り、燃料設計の自由度が増し、燃焼特性、製造性
の向上等の効果が期待される。
According to the present invention, it is possible to apply independent cell spacers to fuel assemblies having fuel rods with different outer diameters, spacer support rods, and hollow rods, which increases the degree of freedom in fuel design and improves combustion characteristics and manufacturability. It is expected to have effects such as improvement in
第１図は燃料集合体全体図、第２図は丸形の独
立セル型スペーサ平面図、第３図は８角形の独立
セル型スペーサ平面図、第４図は丸形の独立セル
型スペーサにおける本発明の実施例の平面図、第
５図は第４図の縦断面図、第６図は８角形の独立
セル型スペーサにおける本発明の実施例の平面
図、第７図は第６図の縦断面図、第８図は丸形の
独立セル型スペーサの単一セルについての本発明
の実施例の平面図、第９図は第８図の縦断面図で
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
ペーサ支持ロツド、６……係合突起、７……独立
セル内面突起、８……縦板バネ、９……丸形独立
セル、１０……８角形独立セル、１１……サイド
バンド、１２……太径のスペーサ支持ロツド、１
３……独立分離型スプリング部材、１４……独立
分離型スプリング部材の突起、１５……独立分離
型スプリング部材の係合部、１６……独立セルの
開口部、１７……独立セルの切れ込み部。
Fig. 1 is an overall view of the fuel assembly, Fig. 2 is a plan view of a round independent cell spacer, Fig. 3 is a plan view of an octagonal independent cell spacer, and Fig. 4 is a plan view of a round independent cell spacer. 5 is a longitudinal sectional view of FIG. 4, FIG. 6 is a plan view of an octagonal independent cell spacer according to an embodiment of the present invention, and FIG. 8 is a plan view of an embodiment of the present invention for a single cell of a round independent cell spacer, and FIG. 9 is a longitudinal sectional view of FIG. 8. DESCRIPTION OF SYMBOLS 1... Upper tie plate, 2... Lower tie plate, 3... Spacer, 4... Fuel rod, 5... Spacer support rod, 6... Engaging projection, 7... Independent cell inner surface projection, 8... Vertical leaf spring, 9... Round independent cell, 10... Octagonal independent cell, 11... Side band, 12... Large diameter spacer support rod, 1
3...Independently separable spring member, 14...Protrusion of independently separable spring member, 15...Engagement portion of independently separable spring member, 16...Opening of independent cell, 17...Notch of independent cell .
Claims (1)
ペーサ支持ロツドが挿入される第２筒状体を有
し、前記第２筒状体を前記第１筒状体間に配置し
て前記第１及び第２筒状体が格子状に組まれ、前
記第２筒状体の外周に沿つて配置されたスプリン
グ部材が前記第２筒状体に隣接された２つの前記
第１筒状体に取付けられ、前記スプリング部材は
前記第２筒状体の側壁に設けられた開口から前記
第２筒状体内に突出して前記スペーサ支持ロツド
を支持する第２突起部を有し、前記第２筒状体の
内面から前記第２突起部のスペーサ支持ロツド接
触部までの高さが、前記第１筒状体の内面から、
前記第１筒状体内に突出して前記燃料棒を支持す
る第１突起部の燃料棒接触部までの高さよりも低
い燃料スペーサ。 ２ 前記第１突起部が前記第１筒状体の一部であ
る特許請求の範囲第１項記載の燃料スペーサ。 ３ 前記第１突起部が、該当する前記第１筒状体
に隣接された２つの他の前記第１筒状体に取付け
られて前記該当する第１筒状体の外周に沿つて配
置された他の前記スプリング部材に設けられ、こ
の第１突起部が前記該当する第１筒状体の側壁に
設けられた開口からその第１筒状体内に突出して
いる特許請求の範囲第１項記載の燃料スペーサ。[Scope of Claims] 1. A fuel rod comprising a plurality of first cylindrical bodies into which fuel rods are inserted and a second cylindrical body into which spacer support rods are inserted, the second cylindrical bodies being connected to the first cylindrical bodies. The first and second cylindrical bodies are arranged in between and assembled in a lattice shape, and a spring member disposed along the outer periphery of the second cylindrical body is arranged between two adjacent cylindrical bodies. The spring member is attached to the first cylindrical body, and the spring member has a second protrusion that projects into the second cylindrical body from an opening provided in a side wall of the second cylindrical body and supports the spacer support rod. However, the height from the inner surface of the second cylindrical body to the spacer support rod contact portion of the second protrusion is from the inner surface of the first cylindrical body,
A fuel spacer having a height lower than a height of a first protrusion that protrudes into the first cylindrical body and supports the fuel rod to a fuel rod contact portion. 2. The fuel spacer according to claim 1, wherein the first protrusion is a part of the first cylindrical body. 3. The first protrusion is attached to two other first cylindrical bodies adjacent to the corresponding first cylindrical body and arranged along the outer periphery of the corresponding first cylindrical body. Claim 1, wherein the first protrusion is provided on the other spring member and projects into the first cylindrical body from an opening provided in the side wall of the corresponding first cylindrical body. fuel spacer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58080746A JPS59206794A (en) | 1983-05-11 | 1983-05-11 | Fuel spacer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58080746A JPS59206794A (en) | 1983-05-11 | 1983-05-11 | Fuel spacer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59206794A JPS59206794A (en) | 1984-11-22 |
| JPS64672B2 true JPS64672B2 (en) | 1989-01-09 |
Family
ID=13726964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58080746A Granted JPS59206794A (en) | 1983-05-11 | 1983-05-11 | Fuel spacer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59206794A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0984642A (en) * | 1995-09-21 | 1997-03-31 | Sun Wave Ind Co Ltd | Fitting structure for bowl cover |
-
1983
- 1983-05-11 JP JP58080746A patent/JPS59206794A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0984642A (en) * | 1995-09-21 | 1997-03-31 | Sun Wave Ind Co Ltd | Fitting structure for bowl cover |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59206794A (en) | 1984-11-22 |
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