JPH01292290A - Fuel assembly - Google Patents
Fuel assemblyInfo
- Publication number
- JPH01292290A JPH01292290A JP63121854A JP12185488A JPH01292290A JP H01292290 A JPH01292290 A JP H01292290A JP 63121854 A JP63121854 A JP 63121854A JP 12185488 A JP12185488 A JP 12185488A JP H01292290 A JPH01292290 A JP H01292290A
- Authority
- JP
- Japan
- Prior art keywords
- tie plate
- lower tie
- fuel assembly
- channel box
- fuel
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 32
- 238000001816 cooling Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000002826 coolant Substances 0.000 abstract description 6
- 230000000712 assembly Effects 0.000 abstract description 4
- 238000000429 assembly Methods 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 abstract 1
- 230000003993 interaction Effects 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000002023 wood Substances 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
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（作業上の利用分野）
本発明は沸騰水型原子炉の炉心に装荷される燃料集合体
に係り、特に、下部タイプレートを改良した燃料集合体
に関する。[Detailed Description of the Invention] [Object of the Invention] (Field of Work Application) The present invention relates to a fuel assembly loaded into the core of a boiling water nuclear reactor, and particularly relates to a fuel assembly with an improved lower tie plate. Regarding.
（従来の技術）
従来、この種の燃料集合体１５は第３図に示すように構
成され、角筒状のヂＶンネルボックス１内に複数本の燃
料棒２とウォータロッド３とを収容している。燃料棒２
およびつＡ−タロラド３は、ぞの軸方向に複数段配設さ
れた複数のスペーサ４にＪ：り束状に結束されると共に
、その相互間の間隔が保持され、これらの下端部を下部
端栓１２を介して下部タイプレート５に、その上端部を
上部端栓１３を介して上部タイブレー１−６にそれぞれ
支持さＵて、燃料バンドル１４に組立てられる。この上
部タイプレート６にはハンドルボスト１１と４木のコー
ナボス１〜１０が立設されている。そして、この燃オ′
３１バンドル１４はヂャンネルファスナ１７によってチ
ャンネルボックス１に固定されている。(Prior Art) Conventionally, this type of fuel assembly 15 is constructed as shown in FIG. ing. fuel rod 2
The A-Tallorado 3 is bundled into a bundle with a plurality of spacers 4 arranged in multiple stages in the axial direction, and the spacing between them is maintained, and the lower ends of these are connected to the lower part. The fuel bundle 14 is assembled into a fuel bundle 14 by supporting the lower tie plate 5 via the end plug 12 and supporting the upper end thereof to the upper tie plate 1-6 via the upper end plug 13, respectively. A handle post 11 and four wooden corner bosses 1 to 10 are erected on the upper tie plate 6. And this burning o'
31 bundle 14 is fixed to channel box 1 by channel fasteners 17.
前記下部タイプレート５は第４図の正面図に示すにうに
構成され、燃料棒２及びウォータロッド３の下部端栓１
２を嵌合させる嵌合穴７を複数行する。また燃料棒２の
除熱のために下部タイブレー１へ５の下部から冷却材が
流入し、この流入した冷印材はチャンネルボックス１内
の複数本の燃料棒２の間隙及びつＡ−タロラド３内を下
から上へ流れる。一方、チャンネルボックス１外側の冷
却のために、チャンネルボックス１外側の流量を確保す
る必要がある。そのため、下部タイブレーｊ〜５５の側
面にそれぞれ１個穿設された冷却孔２３より、チャンネ
ルボックス１の外側へリークする。The lower tie plate 5 is constructed as shown in the front view of FIG.
There are a plurality of rows of fitting holes 7 into which the holes 2 are fitted. In addition, coolant flows into the lower tiebrae 1 from the bottom of the lower tiebrae 5 to remove heat from the fuel rods 2, and this coolant flows into the gaps between the plurality of fuel rods 2 in the channel box 1 and into the A-Talorad 3. flows from bottom to top. On the other hand, in order to cool the outside of the channel box 1, it is necessary to ensure a flow rate outside the channel box 1. Therefore, leakage occurs to the outside of the channel box 1 through the cooling holes 23 formed in the side surfaces of each of the lower tie breakers j to 55.
この様に構成された燃ｉ１バンドル１４の外周には角筒
状のチャンネルボックス１を外嵌さＶて燃料集合体１５
に組立てられる。A rectangular cylindrical channel box 1 is fitted around the outer periphery of the fuel bundle 14 configured in this manner.
It is assembled in.
一方、チャンネルボックス１は使用中（変形する。主な
変形はチャンネルボックス１内を流通する冷却中の圧力
にＪ：る膨張と、中性子照射による照射成長の差による
曲がりがある。この曲がりは中性子照射伍が多い面が凸
となる様に曲がる。従って、炉心の外周近傍では炉心の
中心方向を凸にして曲がる事になる。この変形が大きく
なると制御棒と干渉し制御棒の挿入、引（友きに支障を
きたη−Ｊ３それが生ずる。On the other hand, the channel box 1 deforms during use. The main deformations are expansion due to the pressure flowing inside the channel box 1 during cooling, and bending due to the difference in irradiation growth due to neutron irradiation. It bends so that the surface with more irradiation is convex.Therefore, near the outer periphery of the core, the core bends with the center direction convex.If this deformation becomes large, it will interfere with the control rods, making it difficult to insert or withdraw the control rods. η-J3 that was a hindrance to friendship.
（発明が解決しＪ：うとびる課題）
前述の通り炉心外周の曲がりは炉心中心の方向に凸にな
る。従って、１体の制御棒と４体の燃料集合体からなる
１つの最外周セルを考えると、最外周の燃料集合体のチ
鬼・ンネルボックスは制御棒側に曲がり、制御棒をはさ
んだ炉心中心側の最外周より２列１」の燃料集合体のチ
ャンネルボックスは制御棒より離れる方向に曲がる。従
って、最外周の燃料集合体のチャンネルボックスの曲が
りが大きくなり、制御棒との干渉が心配される場合ぞの
まま平行に最外周より２列口に移動さ−けると、今度は
逆に制御棒よりばれて曲がっていくため問題がなくなる
。(Problem solved by the invention J: Sleeping problem) As mentioned above, the curve of the outer periphery of the core becomes convex in the direction of the center of the core. Therefore, if we consider one outermost cell consisting of one control rod and four fuel assemblies, the tunnel box of the outermost fuel assembly will bend toward the control rod side, and the reactor core with the control rods in between will bend. The channel boxes of the fuel assemblies in rows 2 and 1'' from the outermost periphery on the center side are bent in the direction away from the control rods. Therefore, if the bend in the channel box of the outermost fuel assembly becomes large and there is a concern about interference with the control rods, if you move it in parallel from the outermost circumference to the second row port, the control rods will be controlled in the opposite direction. The problem disappears because it bends apart from the rod.
ところが、現在の燃料集合体は炉内検出器、冷却用の下
部タイプレートの側面に設けた冷却孔が制御棒に而して
いない側にしかなく、対称性がないため平行に隣に移動
させた場合、炉内検出器冷却ができない。このため、ヂ
４ンネルボックスを長期間にわたって使用する場合、チ
寓・ンネルを隣の列に平行に移動できないため、上述し
た燃料集合体の曲がりによって制御棒との干渉により、
制御棒の挿入性が悪化する恐れがある。However, in current fuel assemblies, the in-core detectors and the cooling holes provided on the side of the lower tie plate for cooling are only on the side that is not connected to the control rods, and there is no symmetry, so they cannot be moved parallel to each other. In this case, the in-core detector cannot be cooled. For this reason, when a four-channel box is used for a long period of time, the channel/channel cannot be moved parallel to the adjacent row, and the bending of the fuel assembly mentioned above may cause interference with the control rods.
Control rod insertability may deteriorate.
本発明の目的は上述した事情を考慮してなされたもので
、燃料集合体を平行に隣の列へ移動させることができる
燃料集合体を供給Ｊることにある。The object of the present invention has been made in consideration of the above-mentioned circumstances, and is to provide a fuel assembly that can be moved in parallel to an adjacent row.
（課題を解決するための手段）
上記［目的を達成するために、本発明においては、束状
に結束された複数の燃料棒とウォータロッドを上部端栓
及び下部端栓を介して上部タイブレー１へ及び下部タイ
プレートにて支持し、この上部タイプレートにハンドル
ポストと４木のコーナボストとを立設し、前記束状に結
束された複数の燃お１棒とウォータロッド周囲をチ１ｚ
ンネルフ７スナを介してチャンネルボックスによって囲
繞して成る燃１１集合体において、前記下部タイブレー
Ｉ〜の４面仝でに冷却孔を穿設して成ることを特徴とす
る燃料集合体を提供する。(Means for Solving the Problems) In order to achieve the above object, in the present invention, a plurality of fuel rods and water rods bound into a bundle are connected to an upper tiebrae through an upper end plug and a lower end plug. A handle post and a four-wood corner post are erected on the upper tie plate, and a tie is placed around the plurality of burning sticks and water rods tied together in a bundle.
To provide a fuel assembly characterized in that the fuel assembly is surrounded by a channel box through a channel box via a channel box and is characterized in that cooling holes are formed on all four sides of the lower tiebrae I.
（作 用）
このにうに構成された燃オ十集合体は、炉内検出器冷却
の問題がないため、平行に隣の列へ移動さＵることがで
きる。したがって、チャンネルボックスの曲がりによる
制御棒との干渉を防出することができる。(Function) The fuel assembly configured in this manner can be moved in parallel to the next row because there is no problem of cooling the in-core detector. Therefore, interference with the control rod due to bending of the channel box can be prevented.
（実施例）
以下、本発明の一実施例に係る燃料集合体の要部を示す
下部タイプレートを第１図から第２図を参照して説明す
る。なお、第１図及び第２図において、第３図及び第４
図と同一部分には同一符号を付し、その部分の構成の説
明は省略する。(Embodiment) Hereinafter, a lower tie plate showing a main part of a fuel assembly according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. In addition, in Figures 1 and 2, Figures 3 and 4
The same parts as in the figures are given the same reference numerals, and the explanation of the structure of the parts will be omitted.
第１図において、チャンネルボックス１の外側の流ｆ１
ｉを確保するために、下部タイプレート２５がら流入し
た冷却材の一部をリークさＵるために下部タイプレート
２５の側面全部に冷却孔２６を穿設することにより、ど
の面からも冷却材がリークするようにする。In FIG. 1, the flow f1 outside the channel box 1
In order to ensure that the coolant flowing through the lower tie plate 25 is leaked, cooling holes 26 are formed on all sides of the lower tie plate 25, so that the coolant can be leaked from any side. leak.
にって、−り記構成にＪ：れば、下部タイプレート２５
を任意の位置に向けることができるので、炉心内におい
て燃料集合体１５を平行に隣の位置に移動ざＶることが
できる。If the configuration is J: then the lower tie plate 25
Since the fuel assembly 15 can be directed to an arbitrary position, the fuel assembly 15 can be moved in parallel to an adjacent position within the reactor core.
材をヂＡ・ンネルボックス外側に流出させる冷却孔が全
ての面に穿設されているので炉内検出器の冷却が可能で
ある。よって、燃料集合体を炉心内において平行に一列
移動する事が可能となり、従来は変形のため制限されて
いたチャンネルボックスをさらに長期間使用する事が可
能となる。Cooling holes are provided on all sides to allow the material to flow out of the tunnel box, making it possible to cool the in-furnace detector. Therefore, it becomes possible to move the fuel assembly one line in parallel within the reactor core, and it becomes possible to use the channel box for a longer period of time, which was previously limited due to deformation.
第１図は本発明の一実施例に係る燃オ９１集合体の要部
を示す下部タイプレートの一部を切欠いた正面図、第２
図は第１図に承した下部クイプレー１〜の平面図、第３
図は燃料集合体の従来例を示す縦断面図、第４図は第３
図に示した下部タイプレートの一部を切欠いた正面図、
第５図は第４図に示した下部タイブレー１−の正面図で
ある。
１・・・チャンネルボックス
２・・・燃オ′３１捧
３・・・つＡ−夕［１ツド
５．２５・・・下部クイブレート
６・・司二部タイブレー１−
１０・・・］−ナボスト
１１・・・ハンドルポスト
１２・・・下部端栓
１３・・・下部端栓
１７・・・ヂ（２ンネルフアスナ
２６・・・冷却孔
代理人 弁理士 則 近 憲 佑
同 第子丸 健
第１図
第２図
第３図FIG. 1 is a partially cutaway front view of a lower tie plate showing the main parts of a combustion engine 91 assembly according to an embodiment of the present invention;
The figure is a plan view of the lower quip play 1 to 3 based on Fig. 1.
The figure is a vertical cross-sectional view showing a conventional example of a fuel assembly, and Figure 4 is a vertical cross-sectional view showing a conventional example of a fuel assembly.
A partially cutaway front view of the lower tie plate shown in the figure.
FIG. 5 is a front view of the lower tiebrae 1- shown in FIG. 4. 1...Channel Box 2...Moe O'31 Dedicated 3...Tsu A-Yu [1 Tsudo 5.25...Lower Quiblate 6...Second Part Tiebrae 1-10...]-Navost 11...Handle post 12...Lower end plug 13...Lower end plug 17...Z (2 Nerf Asuna 26...Cooling hole agent Patent attorney Noriyuki Ken Yudo Daishimaru Ken Figure 1 Figure 2 Figure 3
Claims (1)
端栓及び下部端栓を介して上部タイプレート及び下部タ
イプレートにて支持し、この上部タイプレートにハンド
ルポストと４本のコーナポストとを立設し、前記束状に
結束された複数の燃料棒とウォータロッドの周囲をチャ
ンネルファスナを介してチャンネルボックスによつて囲
繞して成る燃料集合体において、前記下部タイプレート
の４面全てに冷却孔を穿設して成ることを特徴とする燃
料集合体。A plurality of fuel rods and water rods tied together in a bundle are supported by an upper tie plate and a lower tie plate via an upper end plug and a lower end plug, and a handle post and four corner posts are attached to the upper tie plate. In the fuel assembly, in which the plurality of fuel rods and water rods bound into a bundle are surrounded by a channel box via a channel fastener, all four sides of the lower tie plate are provided. A fuel assembly characterized by having cooling holes formed therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63121854A JPH01292290A (en) | 1988-05-20 | 1988-05-20 | Fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63121854A JPH01292290A (en) | 1988-05-20 | 1988-05-20 | Fuel assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01292290A true JPH01292290A (en) | 1989-11-24 |
Family
ID=14821577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63121854A Pending JPH01292290A (en) | 1988-05-20 | 1988-05-20 | Fuel assembly |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01292290A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03264892A (en) * | 1990-03-15 | 1991-11-26 | Hitachi Ltd | Fuel assembly and nuclear reactor |
-
1988
- 1988-05-20 JP JP63121854A patent/JPH01292290A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03264892A (en) * | 1990-03-15 | 1991-11-26 | Hitachi Ltd | Fuel assembly and nuclear reactor |
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