JPH0116079Y2 - - Google Patents
Info
- Publication number
- JPH0116079Y2 JPH0116079Y2 JP1982187147U JP18714782U JPH0116079Y2 JP H0116079 Y2 JPH0116079 Y2 JP H0116079Y2 JP 1982187147 U JP1982187147 U JP 1982187147U JP 18714782 U JP18714782 U JP 18714782U JP H0116079 Y2 JPH0116079 Y2 JP H0116079Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel assembly
- fuel
- guide
- nozzle
- grid
- 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
- 239000000446 fuel Substances 0.000 claims description 50
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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)
- Automatic Assembly (AREA)
Description
【考案の詳細な説明】
本案は燃料集合体の装架用ガイドに関するもの
である。[Detailed Description of the Invention] The present invention relates to a mounting guide for a fuel assembly.
加圧水型原子炉の燃料集合体は、第１図に示す
ように上部ノズルａと下部ノズルｂと同各ノズル
ａ，ｂの間に設けた複数の案内管ｃと同各ノズル
ａ，ｂの間に位置して前記案内管ｃを個別に受け
入れる開口をもつたグリツド（通常は６〜７個あ
る）ｄと同グリツドｄの他の開口内に個別に挿着
された燃料棒（図示せず）とをもち、炉心内では
燃料集合体Ａどうしが公称１mmの隙間を隔てて配
置されている。従つて燃料集合体に万一微少な変
形があるとき、または燃料取替機の位置ずれのた
めに燃料集合体が微少量傾いた状態のとき、第２
図に示すように既装荷燃料集合体A1の隣りに次
の燃料集合体A2を装荷し、下部ノズルｂのピン
穴b1を下部炉心ピンｅへ係合して、位置決めする
のが困難である。その困難を解消するために従来
は第３図に示すように装荷用ガイドとして外形寸
法を燃料集合体に一致させた角柱状のガイドアツ
センプリＢを使用し、これに沿わせて燃料集合体
A2を既装荷燃料集合体A1とガイドアツセンブリ
Ｂとの間に装荷している。しかし従来のガイドア
ツセンブリＢは第４図に示すように上部ノズルｆ
と下部ノズルｇと同各ノズルｆ，ｇをつなぐ本体
ｈとよりなり、同本体ｈは重量軽減のため中心部
を第５図に示すようにくり抜いてはいるものの剛
性が高く、装荷の際に燃料集合体A1，A2に無理
な力がかかつて、燃料支持格子（図示せず）等に
損傷を与える可能性があつた。 As shown in Figure 1, the fuel assembly of a pressurized water reactor consists of an upper nozzle a, a lower nozzle b, a plurality of guide pipes c provided between each nozzle a and b, and a plurality of guide pipes c provided between each nozzle a and b. A grid d (usually 6 to 7 in number) having openings located at and individually receiving the guide tubes c, and fuel rods (not shown) individually inserted into other openings of the same grid d. In the reactor core, fuel assemblies A are arranged with a nominal gap of 1 mm between them. Therefore, if there is a slight deformation in the fuel assembly, or if the fuel assembly is slightly tilted due to misalignment of the fuel changer, the second
As shown in the figure, it is difficult to load the next fuel assembly A 2 next to the already loaded fuel assembly A 1 and position it by engaging the pin hole b 1 of the lower nozzle b with the lower core pin e. It is. In order to solve this difficulty, conventionally, as shown in Figure 3, a prismatic guide assembly B whose external dimensions matched those of the fuel assembly was used as a loading guide, and the fuel assembly was assembled along this guide assembly.
A2 is loaded between the pre-loaded fuel assembly A1 and the guide assembly B. However, the conventional guide assembly B has an upper nozzle f as shown in FIG.
The main body h connects the lower nozzle g and the nozzles f and g, and although the center part of the main body h is hollowed out as shown in Figure 5 to reduce weight, it has high rigidity and is easy to handle when loading. Unreasonable force was applied to the fuel assemblies A 1 and A 2 , potentially damaging the fuel support grid (not shown) and the like.
本案は前記の問題点に対処するもので、上部ノ
ズルと下部ノズルと同各ノズルの間に設けた複数
の案内管と同各ノズルの間に位置して前記案内管
を個別に受け入れる開口をもつた格子状グリツド
と同グリツドの他の開口内に個別に挿着された複
数の燃料棒とをもつ燃料集合体を装荷時にガイド
する装荷用ガイドにおいて、前記燃料集合体の燃
料棒部に対応する部分のうち下部の剛性を高く
し、上部の剛性を小さくするとともに同上部内に
過度のたわみ変形防止用ストツパを設け、前記燃
料集合体の下部ノズル部に対応する部分に位置決
めピンの嵌挿される穴を設けたことを特徴とする
装荷用ガイドに係り、その目的とする処は、燃料
支持格子等に損傷を与えずに燃料集合体を既装荷
燃料集合体の隣りに装架できる改良された装架用
ガイドを供する点にある。 This proposal addresses the above-mentioned problems, and includes an upper nozzle, a lower nozzle, a plurality of guide tubes provided between each of the nozzles, and an opening located between each of the nozzles to receive the guide tubes individually. In a loading guide for guiding a fuel assembly having a lattice-like grid and a plurality of fuel rods individually inserted into other openings of the grid, the loading guide corresponds to the fuel rod portion of the fuel assembly. Among the parts, the lower part has a higher rigidity, the upper part has a lower rigidity, and a stopper for preventing excessive deflection and deformation is provided in the upper part, and a hole into which a positioning pin is inserted is provided in a part corresponding to the lower nozzle part of the fuel assembly. The purpose of this loading guide is to provide an improved loading guide that allows fuel assemblies to be mounted next to already loaded fuel assemblies without damaging fuel support grids, etc. The point is that it provides a mounting guide.
次に本案の装架用ガイドを第６図乃至第９図に
示す一実施例により説明すると、１が本装架用ガ
イドの全体、１ａが燃料集合体の燃料棒部に対応
する部分のうち下部で、同下部１ａの剛性は高い
（第９図参照）。また１ｂが燃料集合体の上部ノズ
ル部に対応する部分（頂部）、１ｃが燃料集合体
の燃料棒部に対応する部分のうち上部で、型鋼に
より構成され（第７，８図参照）、下部１ａと頂
部１ｂとを一体につないでいる。同上部１ｃは、
上記のように型鋼で構成されており、燃料集合体
の変形または燃料取替機の位置ずれによる燃料集
合体の傾きに応じて適当に変形するしなやかさを
もつている。また２が上記下部１ａ上の上記上部
１ｃ内に設けた上部１ｃの過度のたわみ変形防止
用ストツパで、裁頭角錐状に形成している。また
１ａ−１が上記下部１ａに設けた穴で、同穴１ａ
−１に第２図に示した下部炉心ピン（位置決めピ
ン）ｅが嵌挿されるようになつている。 Next, the mounting guide of the present invention will be explained using an embodiment shown in FIGS. 6 to 9. 1 is the entire mounting guide, and 1a is the part corresponding to the fuel rod part of the fuel assembly. The lower part 1a has high rigidity (see FIG. 9). In addition, 1b is the part (top) corresponding to the upper nozzle part of the fuel assembly, 1c is the upper part of the part corresponding to the fuel rod part of the fuel assembly, which is made of shaped steel (see Figures 7 and 8), and the lower part 1a and the top portion 1b are integrally connected. The upper part 1c is
As mentioned above, it is made of shaped steel and has the flexibility to deform appropriately in response to the deformation of the fuel assembly or the inclination of the fuel assembly due to misalignment of the fuel exchanger. Further, numeral 2 denotes a stopper for preventing excessive deflection and deformation of the upper part 1c, which is provided in the upper part 1c above the lower part 1a, and is formed in the shape of a truncated pyramid. In addition, 1a-1 is a hole provided in the lower part 1a, and the same hole 1a
The lower core pin (positioning pin) e shown in FIG. 2 is inserted into the lower core pin (1).
本案の装架用ガイド１は前記のように構成され
ており、燃料集合体を既装架燃料集合体の隣りに
装架するとき、燃料集合体に微少な変形があると
き、または燃料取替機の位置ずれによつて燃料集
合体が傾いているときには、装架用ガイド１のう
ち、上部１ｃが上記変形或いは上記傾きに応じて
変形する。またこのとき、ストツパ２が同上部１
ｃの過度のたわみ変形を防止する。一方、装架用
ガイド１の下部１ａは、剛性が高いので、燃料集
合体の下部ノズル（第１，２図のｂ参照）を確実
に案内して、同下部ノズルのピン穴を下部炉心ピ
ン（第２図のｅ参照）へ円滑に係合させる。 The mounting guide 1 of the present invention is configured as described above, and is used when mounting a fuel assembly next to an already mounted fuel assembly, when there is slight deformation in the fuel assembly, or when the fuel assembly is being replaced. When the fuel assembly is tilted due to misalignment of the aircraft, the upper portion 1c of the mounting guide 1 deforms in accordance with the above deformation or the above inclination. Also, at this time, the stopper 2 is
Prevent excessive flexural deformation of c. On the other hand, since the lower part 1a of the mounting guide 1 has high rigidity, it reliably guides the lower nozzle of the fuel assembly (see b in Figures 1 and 2) and makes the pin hole of the lower nozzle the pin hole of the lower core pin. (see e in Figure 2).
従つて本案の装架用ガイドによれば、燃料支持
格子等に損傷を与えずに燃料集合体を既装架燃料
集合体の隣りに装架できる効果がある。 Therefore, according to the mounting guide of the present invention, the fuel assembly can be mounted next to the already mounted fuel assembly without damaging the fuel support grid or the like.
第１図は燃料集合体の概略を示す一部縦断側面
図、第２図は装架しようとする燃料集合体が既装
荷燃料集合体に対し傾いた状態を示す説明図、第
３図は装架用ガイドの使用状態を示す説明図、第
４図は従来の装架用ガイドを示す側面図、第５図
は第４図矢視−線に沿う横断平面図、第６図
は本案に係る装架用ガイドの一実施例を示す側面
図、第７図は第６図矢視−線に沿う横断平面
図、第８図は第６図矢視−線に沿う横断平面
図、第９図は第６図矢視−線に沿う横断平面
図である。
ＡまたはA1，A2……燃料集合体、ａ……上部
ノズル、ｂ……下部ノズル、ｃ……案内管、ｄ…
…グリツド、１……装架用ガイド、１ａ……下
部、１ａ−１……穴、１ｃ……上部、２……過度
のたわみ変形防止用ストツパ。
Figure 1 is a partially longitudinal side view schematically showing a fuel assembly, Figure 2 is an explanatory diagram showing a state in which the fuel assembly to be mounted is tilted relative to the already loaded fuel assembly, and Figure 3 is an illustration of the fuel assembly to be mounted. An explanatory diagram showing how the mounting guide is used, Fig. 4 is a side view showing a conventional mounting guide, Fig. 5 is a cross-sectional plan view taken along the arrow line in Fig. 4, and Fig. 6 is related to the present proposal. A side view showing an embodiment of the mounting guide, FIG. 7 is a cross-sectional plan view taken along the arrow line in FIG. 6, FIG. 8 is a cross-sectional plan view taken along the arrow line in FIG. 6, and FIG. 6 is a cross-sectional plan view taken along the arrow line in FIG. 6. FIG. A or A 1 , A 2 ... fuel assembly, a ... upper nozzle, b ... lower nozzle, c ... guide pipe, d ...
...Grid, 1... Mounting guide, 1a... Lower part, 1a-1... Hole, 1c... Upper part, 2... Stopper for preventing excessive deflection and deformation.
Claims (1)
けた複数の案内管と同各ノズルの間に位置して前
記案内管を個別に受け入れる開口をもつた格子状
グリツドと同グリツドの他の開口内に個別に挿着
された複数の燃料棒とをもつ燃料集合体を装荷時
にガイドする装荷用ガイドにおいて、前記燃料集
合体の燃料棒部に対応する部分のうち下部の剛性
を高くし、上部の剛性を小さくするとともに同上
部内に過度のたわみ変形防止用ストツパを設け、
前記燃料集合体の下部ノズル部に対応する部分に
位置決めピンの嵌挿される穴を設けたことを特徴
とする装架用ガイド。 A lattice-shaped grid having an upper nozzle, a lower nozzle, a plurality of guide pipes provided between each of the nozzles, and an opening located between each of the nozzles to individually receive the guide pipe, and other openings of the grid. In a loading guide that guides a fuel assembly having a plurality of fuel rods individually inserted into the fuel assembly during loading, the lower part of the fuel assembly corresponding to the fuel rod part is made more rigid, and the upper part is made more rigid. In addition to reducing rigidity, a stopper is installed in the upper part to prevent excessive deflection and deformation.
A mounting guide characterized in that a hole into which a positioning pin is inserted is provided in a portion corresponding to the lower nozzle portion of the fuel assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982187147U JPS5990893U (en) | 1982-12-13 | 1982-12-13 | mounting guide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982187147U JPS5990893U (en) | 1982-12-13 | 1982-12-13 | mounting guide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5990893U JPS5990893U (en) | 1984-06-20 |
| JPH0116079Y2 true JPH0116079Y2 (en) | 1989-05-12 |
Family
ID=30404042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982187147U Granted JPS5990893U (en) | 1982-12-13 | 1982-12-13 | mounting guide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5990893U (en) |
-
1982
- 1982-12-13 JP JP1982187147U patent/JPS5990893U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5990893U (en) | 1984-06-20 |
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