JPH045960B2 - - Google Patents
Info
- Publication number
- JPH045960B2 JPH045960B2 JP60285562A JP28556285A JPH045960B2 JP H045960 B2 JPH045960 B2 JP H045960B2 JP 60285562 A JP60285562 A JP 60285562A JP 28556285 A JP28556285 A JP 28556285A JP H045960 B2 JPH045960 B2 JP H045960B2
- Authority
- JP
- Japan
- Prior art keywords
- vibration
- support part
- vibration isolator
- plate
- support
- 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 - Lifetime
Links
- 230000035882 stress Effects 0.000 description 9
- 238000002955 isolation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel 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)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、円板状構造物（防振板）の支持部で
円筒形状をしたものに係わり、特に構造物とその
支持部の双方の熱膨張差による熱応力を緩和させ
るのに好適な支持構造に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a cylindrical supporting portion of a disc-shaped structure (vibration isolating plate), and in particular, the present invention relates to a cylindrical supporting portion of a disc-shaped structure (vibration isolating plate). The present invention relates to a support structure suitable for relieving thermal stress caused by differential expansion.
従来の縦型圧力管型原子炉では、防振板と防振
板支持部の熱膨張差が大きいと剛性の小さい防振
板が支持部より大きい強制変位を受け強度不足と
なるため防振板の材質は、出来る限り防振板支持
部と熱膨張率差の小さい材質を選ぶことが望まし
い。
In conventional vertical pressure tube nuclear reactors, if the difference in thermal expansion between the vibration isolator and the support part of the vibration isolator is large, the vibration isolator, which has less rigidity, will undergo a larger forced displacement than the support part, resulting in insufficient strength. It is desirable to select a material that has as little difference in coefficient of thermal expansion as possible from the vibration isolator support part.
しかしながら、防振板の耐食性の向上及び核特
性の向上の理由から、防振板の材質としては熱膨
張差が比較的大きいジルカロイ−２を使うことに
なつた。このため、熱膨張差による熱応力を緩和
させるに好適な防振板支持構造が必要となつた。 However, in order to improve the corrosion resistance and nuclear properties of the vibration isolator, it was decided to use Zircaloy-2, which has a relatively large difference in thermal expansion, as the material for the vibration isolator. For this reason, a vibration-proof plate support structure suitable for alleviating thermal stress due to the difference in thermal expansion has become necessary.
なお、この種の技術としては、文献、日立評論
VOL 64、No.８（1982−８）に記載がある。 This type of technology is described in literature and Hitachi Review.
Described in VOL 64, No. 8 (1982-8).
本発明の目的は、構造物とその支持部に熱膨張
差が生じても、構造物の強度を保つように熱膨張
差による変形を構造物にあまり伝えないようにす
る構造物支持装置を提供することにある。
An object of the present invention is to provide a structure support device that prevents deformation caused by the thermal expansion difference from being transmitted to the structure to a large extent so as to maintain the strength of the structure even if a thermal expansion difference occurs between the structure and its supporting part. It's about doing.
本発明は、縦型圧力管型原子炉のカランドリア
タンク内で小径の中性子検出器案内管の振れ止め
である薄肉円板の防振板を支持している円筒形状
の支持部において、前記支持部の円筒形状の上端
に上部に開口した切欠きを円周方向に断続的に設
け、前記切欠きを円周方向に断続的に設けた前記
上端に前記防振板を取付けてあることを特徴とす
る防振板支持構造であり、この構造により、円筒
形状の上端であるが故に途中の部位よりも撓みや
すい前記支持部の円筒形状の上端が、切欠きによ
りさらに凹形状の連続した櫛型とされて、さらに
撓みやすくされており、そのように加工された上
端に防振板が取付けられるものであるから、防振
板やその支持部に熱が加えられて熱膨張量に差を
生じてもその支持部の上端が良く撓んで支持部に
連続する防振板等の構造物の熱変形を抑制し、そ
の構造物や支持部自体の発生応力を小さく抑制し
する作用効果を得、もつて防振板の耐食性を考慮
してその支持部と熱膨張差が生じやすい材料を防
振板に用いなければならない環境の原子炉におい
て防振板の健全性を確保する構造が成立すること
が出来る。
The present invention provides a cylindrical support portion that supports a thin disk vibration isolator serving as a steady rest for a small-diameter neutron detector guide tube in a calandria tank of a vertical pressure tube nuclear reactor. Notches opening upward are provided intermittently in the circumferential direction at the upper end of the cylindrical shape of the part, and the vibration isolating plate is attached to the upper end where the notches are provided intermittently in the circumferential direction. This structure allows the cylindrical upper end of the support part, which is cylindrical and therefore easier to bend than the middle part, to have a continuous comb-shaped concave shape with a notch. Since the vibration isolator is attached to the upper end that has been processed in this way, heat is applied to the vibration isolator and its support, causing a difference in the amount of thermal expansion. Even if the upper end of the support part is bent well, it suppresses thermal deformation of structures such as vibration isolators that are continuous to the support part, and the stress generated in the structure and the support part itself is suppressed to a small level. A structure that ensures the integrity of the vibration isolator in a nuclear reactor environment where the vibration isolator must be made of a material that tends to have a difference in thermal expansion from its support part in consideration of its corrosion resistance. I can do it.
本発明を新型転換炉実証炉に採用した場合につ
いて述べる。
A case will be described in which the present invention is applied to a new type converter demonstration reactor.
第１図に示すようにジルカロイ−２製の防振板
１は、ステレンス製のカランドリアタンク２の中
央部に、小径の中性子検出器案内管３の防振のた
めに設置されている。 As shown in FIG. 1, a vibration isolating plate 1 made of Zircaloy-2 is installed in the center of a calandria tank 2 made of stainless steel to prevent vibration of a small-diameter neutron detector guide tube 3.
この中性子検出器案内管３は、カランドリアタ
ンク２内のカランドリア管４が林立する中にある
ので径を大きくすることはできない。また案内管
３の中には中性子検出器が入つていて地震時に案
内管３がカランドリア管４に衝突した場合には検
出器が損傷してしまう。 The diameter of the neutron detector guide tube 3 cannot be increased because it is located in a row of calandria tubes 4 in the calandria tank 2. Further, a neutron detector is contained in the guide tube 3, and if the guide tube 3 collides with the calandria tube 4 during an earthquake, the detector will be damaged.
したがつて、中性子検出器案内管３は地震時に
振れ止めのために防振板が必要である。 Therefore, the neutron detector guide tube 3 requires a vibration isolation plate to prevent it from shaking during an earthquake.
防振板１は、薄肉大径の円板であり、中性子検
出器案内管３、カランドリア管４等を通すため多
数の穴があいている多孔板となつている。防振板
支持部５は、円筒形状の構造物で先端に防振板１
をボルト６締めしている。防振板１の詳細図（1/
４セクター）を第２図に示す。なお、カランドリ
ア管の穴９は、バカ穴でありカランドリア管４を
防振していない。 The vibration isolation plate 1 is a thin-walled, large-diameter circular plate, and is a perforated plate having a large number of holes for passing the neutron detector guide tube 3, calandria tube 4, and the like. The vibration isolator support part 5 is a cylindrical structure with a vibration isolator 1 at the tip.
is tightened with 6 bolts. Detailed diagram of vibration isolation plate 1 (1/
4 sectors) is shown in Figure 2. Note that the hole 9 in the calandria tube is a stupid hole and does not provide vibration isolation for the calandria tube 4.
この防振板１と防振板支持部５が運転温度に達
すると相方の材質の違いにより熱膨張差が生じる
第３図に示すように防振板支持部５の熱膨張量１
０が防振板１の熱膨張量１１より大きいため相対
的に防振板１は、防振板支持部５より外側に引張
られ、逆に防振板支持部５は、防振板１により内
側に引張られる。カランドリアタンク２の上下方
向の伸びは、カランドリア管４（ジルカロイ−２
製）と同じになり、双方の伸び差は凸部１５で吸
収する構造となつているが図が複雑になるため、
表示を省略した。その結果、防振板支持部５より
剛性の小さい防振板１は防振板支持部５より大き
く変形し、かつ多孔板のため応力集中が発生する
ので強度不足となる。したがつて、防振板１を支
持している支持部５の剛性を落として防振板１の
支持部５による強制変位量１２を少なくする必要
がある。 When the vibration isolator 1 and the vibration isolator support 5 reach the operating temperature, a difference in thermal expansion occurs due to the difference in the materials of the other.As shown in FIG. 3, the amount of thermal expansion 1 of the vibration isolator 5 is
0 is larger than the amount of thermal expansion 11 of the vibration isolating plate 1, the vibration isolating plate 1 is relatively pulled outward from the vibration isolating plate supporting part 5, and conversely, the vibration isolating plate supporting part 5 is pulled outward by the vibration isolating plate 1. pulled inward. The vertical extension of the calandria tank 2 is the calandria tube 4 (Zircaloy-2
The difference in elongation between the two is absorbed by the convex part 15, but the diagram becomes complicated, so
Display omitted. As a result, the vibration isolator 1, which has a lower rigidity than the vibration isolator support part 5, deforms more than the vibration isolator support part 5, and since it is a perforated plate, stress concentration occurs, resulting in insufficient strength. Therefore, it is necessary to reduce the amount of forced displacement 12 of the vibration-proof plate 1 by the support part 5 by reducing the rigidity of the support part 5 that supports the vibration-proof plate 1.
その方法として次の方法が考えられた。 The following method was considered as a method for this purpose.
(1) 防振板支持部５の板厚を薄くする。(1) Reduce the thickness of the vibration isolator support portion 5.
(2) 防振板支持部５の長さを長くする。（第４図
参照）
(3) 防振板支持部５の構造を変更する。（第５図
参照）
(1)の防振板支持部５の板厚を薄くする方法で
は、支持部５の剛性は落ちるが、支持部５は円筒
形であり、それが内側に変形するため支持部５の
円周方向応力が大きくなり許容値を越えてしま
う。したがつて、支持部５の板厚を薄くすること
で剛性低下を図ることはできない。(2) Increase the length of the vibration isolator support portion 5. (See Figure 4) (3) Change the structure of the vibration isolator support part 5. (Refer to Figure 5) In the method (1) of reducing the thickness of the vibration isolating plate support part 5, the rigidity of the support part 5 decreases, but since the support part 5 is cylindrical and deforms inward. The stress in the circumferential direction of the support portion 5 increases and exceeds the allowable value. Therefore, it is not possible to reduce the rigidity by reducing the thickness of the support portion 5.
(2)の防振板支持部５の長さを長くする方法でも
支持部の剛性は落ちる。しかし、上記の(1)同様支
持部５が内側に変形するため支持部５の円周方向
の応力が大きくなり許容値を越えてしまう。 Even with the method (2) of increasing the length of the vibration-proof plate support portion 5, the rigidity of the support portion decreases. However, as in (1) above, since the support portion 5 deforms inward, the stress in the circumferential direction of the support portion 5 becomes large and exceeds the allowable value.
防振板支持部５の剛性低下の他の方法としては
(3)の構造変更がある。その方法として円筒形状の
防振板支持部５に軸方向及び周方向に切欠き１６
を設けて半径方向の剛性を小さくし、かつ円周方
向の応力を逃がす構造とする。その結果、防振板
支持部５の応力は許容値内におさまり、かつ防振
板支持部５の剛性が小さくなつたためその変形が
大きくなり、防振板１の応力も許容値におさまる
ようになつた。 Another method for reducing the rigidity of the vibration isolating plate support part 5 is
There is a structural change in (3). As a method, notches 16 are formed in the cylindrical vibration isolating plate support part 5 in the axial and circumferential directions.
The structure is such that the rigidity in the radial direction is reduced and the stress in the circumferential direction is released. As a result, the stress in the vibration isolator support part 5 is kept within the allowable value, and since the rigidity of the vibration isolator support part 5 is reduced, its deformation becomes large, and the stress in the vibration isolator 1 is also kept within the allowable value. Summer.
本発明によれば、構造物とその構造物支持部に
熱膨張差の生じる場合においても、構造物に加わ
る支持部からの強制変位量が小さくすること、及
び支持部自体の応力緩和ができるので、構造物及
び構造物支持部の発生応力を許容値以内に下げる
のに効果がある。
According to the present invention, even when a difference in thermal expansion occurs between a structure and its support part, the amount of forced displacement from the support part applied to the structure can be reduced, and the stress in the support part itself can be relaxed. , is effective in lowering the stress generated in the structure and the structure support part to within the permissible value.
第１図は本発明の一実施例の原子炉本体の正面
図、第２図は防振板の平面図、第３図はカランド
リアタンクの正面図、第４図はカランドリアタン
クの正面図、第５図はカランドリアタンクの防振
板支持部に切り欠きを設けた場合を示す正面図で
ある。
１……防振板、２……カランドリアタンク、４
……カランドリア管、５……防振板支持部、１１
……防振板の熱膨張量、１６……防振板支持部の
切欠き。
Fig. 1 is a front view of the reactor main body according to an embodiment of the present invention, Fig. 2 is a plan view of the vibration isolation plate, Fig. 3 is a front view of the calandria tank, and Fig. 4 is a front view of the calandria tank. , FIG. 5 is a front view showing a case where a notch is provided in the vibration isolating plate support portion of the calandria tank. 1...Vibration isolation plate, 2...Calandria tank, 4
... Calandria tube, 5 ... Vibration isolating plate support section, 11
...Amount of thermal expansion of the vibration isolator, 16...Notch in the vibration isolator support.
Claims (1)
で小径の中性子検出器案内管の振れ止めである薄
肉円板の防振板を支持している円筒形状の支持部
において、前記支持部の円筒形状の上端に上部に
開口した切欠きを円周方向に断続的に設け、前記
切欠きを円周方向に断続的に設けた前記上端に前
記防振板を取付けてあることを特徴とする防振板
支持構造。1. In a cylindrical support part that supports a thin disk vibration isolator plate that serves as a steady rest for a small-diameter neutron detector guide tube in a calandria tank of a vertical pressure tube reactor, the cylinder of the support part A vibration damper characterized in that a notch opening upwardly is provided intermittently in the circumferential direction at an upper end of the shape, and the vibration isolating plate is attached to the upper end where the notch is provided intermittently in the circumferential direction. Shaking plate support structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60285562A JPS62145198A (en) | 1985-12-20 | 1985-12-20 | Support structure of vebration-proof plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60285562A JPS62145198A (en) | 1985-12-20 | 1985-12-20 | Support structure of vebration-proof plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62145198A JPS62145198A (en) | 1987-06-29 |
| JPH045960B2 true JPH045960B2 (en) | 1992-02-04 |
Family
ID=17693154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60285562A Granted JPS62145198A (en) | 1985-12-20 | 1985-12-20 | Support structure of vebration-proof plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62145198A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53122087A (en) * | 1977-04-01 | 1978-10-25 | Hitachi Ltd | Pressure type reactor |
-
1985
- 1985-12-20 JP JP60285562A patent/JPS62145198A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53122087A (en) * | 1977-04-01 | 1978-10-25 | Hitachi Ltd | Pressure type reactor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62145198A (en) | 1987-06-29 |
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