JPH03172795A - Hydraulic shock buffer device - Google Patents
Hydraulic shock buffer deviceInfo
- Publication number
- JPH03172795A JPH03172795A JP1312185A JP31218589A JPH03172795A JP H03172795 A JPH03172795 A JP H03172795A JP 1312185 A JP1312185 A JP 1312185A JP 31218589 A JP31218589 A JP 31218589A JP H03172795 A JPH03172795 A JP H03172795A
- Authority
- JP
- Japan
- Prior art keywords
- cask
- upper plate
- top plate
- cylinder
- pool
- 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.)
- Granted
Links
- 230000035939 shock Effects 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000006096 absorbing agent Substances 0.000 claims description 7
- 239000002915 spent fuel radioactive waste Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 2
- 230000008602 contraction Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010186 staining Methods 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
- Vibration Dampers (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
原子力発電所における使用済み核燃料は、キャスクと称
される輸送容器に収容されて処理される。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) Spent nuclear fuel in a nuclear power plant is stored in a transport container called a cask and processed.
そして、キャスクへの使用済み核燃料の装荷は。And the loading of spent nuclear fuel into casks.
水を満たしたプール内の水中で行なわれる。本発明は、
キャスクをプール内に吊り降ろし、あるいは吊り上げる
際に、誤ってこれを落下させたとき、プール底への？＃
撃をやわらげ、損傷を防止するためのｗＩ撃緩衝装置に
関するものである。It is performed underwater in a pool filled with water. The present invention
If you accidentally drop the cask while lowering or lifting it into the pool, will it fall to the bottom of the pool? #
This invention relates to a wI impact buffer for softening impact and preventing damage.
（従来の技術）
従来、原子力発電所内のプール内に設置される緩衝装置
として、プール内の水を作動流体として利用した水圧式
の衝撃緩衝装置が知られている。(Prior Art) Conventionally, as a shock absorber installed in a pool in a nuclear power plant, a hydraulic impact shock absorber that uses water in the pool as a working fluid is known.
この水圧式衝撃緩衝装置は、プール内の水中にあって、
キャスクの落下による衝撃荷重を直接受ける上板と、プ
ールの底上にあって、衝撃荷重を支持する下板と、衝撃
荷重を受けて上板と下板とが互いに接近したときに、シ
リンダ内のピストンが移動して収縮し、内部の水圧室内
の水をオリフィスを介してプール内へ放出する複数のシ
リンダ装置と、これら各シリンダ装置の外周に被挿され
、常時上板を所定の高さ位置に保持すべく、これを上方
へ付勢する復元ばねとを具備したものである。This hydraulic shock absorber is located underwater in the pool.
There is an upper plate that directly receives the impact load due to the fall of the cask, a lower plate that is on the bottom of the pool and supports the impact load, and when the upper and lower plates approach each other due to the impact load, the inside of the cylinder A plurality of cylinder devices whose piston moves and contracts to release water from the internal hydraulic chamber into the pool through an orifice, and which are inserted into the outer periphery of each of these cylinder devices to keep the top plate at a constant height. It is equipped with a restoring spring that biases it upward to hold it in position.
この水圧式衝撃緩衝装置においては、シリンダ装置と復
元ばねとが合体しており、このようなシリンダ装置が上
板と下板との間にあってほぼ均等に間隔をおいて林立し
ている。しかして、何らかの原因でキャスクが上板上に
落下すると、復元ばねが圧縮されて上板が下降すると共
に、シリンダ装置が収縮して、ピストンがシリンダ内を
移動し、水圧室内の水をオリフィスを介してプール内へ
放出する。このときの水の流通抵抗により衝撃を緩衝す
るものである。In this hydraulic shock absorbing device, a cylinder device and a restoring spring are combined, and these cylinder devices are arranged in a row at approximately equal intervals between an upper plate and a lower plate. However, if the cask falls onto the top plate for some reason, the restoring spring is compressed and the top plate descends, and the cylinder device contracts, causing the piston to move inside the cylinder and direct the water in the hydraulic chamber to the orifice. into the pool. The impact is buffered by the water flow resistance at this time.
しかし、常時は緩衝装置の上にゆっくりとキャスクが吊
り降ろされる。このとき、シリンダ装置は復元ばねと共
に収縮してそのストロークエンドでキャスクを支持する
。プール内でのキャスクへの使用済み核燃料の装荷が完
了すると、キャスクは再び吊り上げられ、所定の部所へ
運搬される。However, the cask is normally lowered slowly onto the shock absorber. At this time, the cylinder device contracts together with the restoring spring to support the cask at the end of its stroke. When the loading of spent nuclear fuel into the cask within the pool is completed, the cask is lifted up again and transported to a predetermined location.
キャスクが上板の上から吊り上げられると、復元ばねに
よって上板が押し上げられ、シリンダ装置も伸長して復
元する。衝撃緩衝装置は、このような切作を繰返し行な
うことになる。When the cask is lifted from above the top plate, the top plate is pushed up by the restoring spring, and the cylinder device also extends and returns to its original position. The shock absorbing device will undergo such cutting repeatedly.
（発明が解決しようとする課題）
上記のような従来の衝す賃緩衝装置においては、キャス
クの重みでシリンダ装置が収縮する過程において、キャ
スクが衝撃緩衝装置の中心からすれると、キャスクが上
板と共に傾きやすく、上板が傾くとシリンダ装置の！１
８７動部がスティックし、伸縮動作をスムーズに行なえ
ないという問題があった。(Problem to be Solved by the Invention) In the conventional impact shock absorbing device as described above, if the cask slips from the center of the shock absorbing device during the process of contraction of the cylinder device due to the weight of the cask, the cask may rise. It tends to tilt along with the plate, and if the upper plate tilts, the cylinder device! 1
There was a problem in that the 87 moving parts stuck and the expansion and contraction operations could not be performed smoothly.
従って、本発明は、上板の傾きを最小限に止め。Therefore, the present invention minimizes the inclination of the top plate.
シリンダ装置の１１ワ動部のステインクを防止すること
ができる水圧式の衝撃緩衝装置を提供することを課題と
している。An object of the present invention is to provide a hydraulic shock absorbing device that can prevent staining of 11 moving parts of a cylinder device.
（課題を解決するための手段）
本発明においては、上記課題を解決するため、シリンダ
装置３と復元ばね４とを分離し、シリンダ装置３は、キ
ャスクＣが載せ置かれる中央付近に集中配置し、復元ば
ね４は、シリンダ装置３を囲むようにその外側に配置し
て水圧式衝撃緩衝装置を構成した。(Means for Solving the Problems) In the present invention, in order to solve the above problems, the cylinder device 3 and the restoring spring 4 are separated, and the cylinder device 3 is centrally arranged near the center where the cask C is placed. The restoring spring 4 is arranged outside the cylinder device 3 so as to surround it to constitute a hydraulic shock absorbing device.
（作 用）
本発明の衝撃緩衝装置においては、何らかのＩＡＣ囚で
キャスクＣが上板１上に落下すると、復元ばね４が圧縮
されて上板１が下降すると共に、シリンダ装置３が収縮
して、ピストン（シリンダ７゜８）がシリンダ１内を下
降し、水圧室９，１０内の水をオリフィス７ａ、８ａを
介してプール内へ放出する。このときの水の流通抵抗に
より衝撃を緩衝する。また、例えばキャスクＣが上板１
の中心からずれた位置に吊り降ろされ、キャスクＣと共
に上板１が傾く力を受けると、上板１の外側部に集中配
置された復元はね４がこれに対抗する。(Function) In the shock absorbing device of the present invention, when the cask C falls onto the upper plate 1 due to some type of IAC, the restoring spring 4 is compressed, the upper plate 1 is lowered, and the cylinder device 3 is contracted. , a piston (cylinder 7.8) moves down inside the cylinder 1 and releases the water in the hydraulic chambers 9, 10 into the pool via the orifices 7a, 8a. The impact is buffered by the water flow resistance at this time. Also, for example, if cask C is upper plate 1
When the upper plate 1 is suspended at a position shifted from the center of the cask C and receives a tilting force, the restoring springs 4 concentrated on the outer side of the upper plate 1 counteract this force.
従って、上板ｌの傾きが阻止され、シリンダ装置３のス
ティックが防止されることになる。復元ばね４は、上板
１の中央部から離れた位置にあるから、大きなモーメン
トで上板１の傾きを是正する方向の対抗力を発揮する。Therefore, the top plate l is prevented from tilting, and the cylinder device 3 is prevented from sticking. Since the restoring spring 4 is located away from the center of the upper plate 1, it exerts a counterforce in the direction of correcting the inclination of the upper plate 1 with a large moment.
また、シリンダ装置３は中央部に集中配置されるから、
上板１のわすかな傾きの影響から免れることができる。Furthermore, since the cylinder device 3 is centrally arranged,
It is possible to avoid the influence of a slight inclination of the upper plate 1.
（実施例）
第１図ないし第３図について本発明の一実施例を説明す
る。第１図は衝撃緩衝装置の正面図、第２図は衝撃緩衝
装置の平面図、第３図は第２図ｌ１ｌ−ＩＩＩ線による
縦断正面であり、左半分を収縮した状態で示した。(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a front view of the shock absorbing device, FIG. 2 is a plan view of the shock absorbing device, and FIG. 3 is a vertical cross-sectional front view taken along line 11-III in FIG. 2, with the left half shown in a contracted state.
この実施例の衝撃緩衝装置３０は、プール内の水中にあ
って、キャスクＣの落下による衝撃荷重を直接受ける上
板１と、プールの底Ｂ上にあって。The shock absorbing device 30 of this embodiment is located underwater in a pool, and is located on the upper plate 1 that directly receives the impact load due to the fall of the cask C, and on the bottom B of the pool.
衝撃荷重を支持する下板２と、上板１と下板２との間に
設けられたシリンダ装置３と、同じく上板１と下板２と
の間に設けられた復元ばね４とを具備している。It includes a lower plate 2 that supports impact loads, a cylinder device 3 provided between the upper plate 1 and the lower plate 2, and a restoring spring 4 also provided between the upper plate 1 and the lower plate 2. are doing.
下板２の４隅から直立したガイドコラム５は。The guide columns 5 stand upright from the four corners of the lower plate 2.
上板１の４隅を上下摺動自由に貫通し、従って、上板１
は、下板２に対して上下動自在である。It passes through the four corners of the upper plate 1 so as to freely slide up and down, so that the upper plate 1
is vertically movable with respect to the lower plate 2.
シリンダ装置３は、中央部に集中して４つ設けられてい
る。即ち、シリンダ装置３は、第３図に示すように、下
板２に下端を閉塞するように固定された第１シリンダ６
と、この第１シリンダ６内に上下に摺動自在に挿入され
た第２シリンダ７と、この第２シリンダ７内に摺動自在
に挿入された第３シリンダ８とから成る。第２シリンダ
７は第１シリンダ６に対して、また第３シリンダ８は第
２シリンダ７に対して夫々ピストンとして動作するよう
になっている。第２シリンダ７及び第３シリンダ８の側
面には、夫々縦方向のオリフィス溝７ａ、８ａが形成さ
れており、各シリンダ内に形成される水圧室９，１０を
外部と連通している。第３シリンダ８の上端のｉ８ｂは
、吊りボルト１１にて上板１に吊り止められている。即
ち、吊りボルト１１は、上板１に固定された吊り板１ａ
の中央に形成された孔１ｂを緩く貫通して、止め板１１
ａにより抜は止めされている。しかして、シリンダ装置
３は、衝撃荷重を受けて上板１と下板２とが互いに接近
したときに、水圧室９，１０内の水をオリフィス溝７ａ
、８ａを介してプール内へ放出しながら収縮する。Four cylinder devices 3 are provided, concentrated in the center. That is, as shown in FIG. 3, the cylinder device 3 includes a first cylinder 6 fixed to the lower plate 2 so as to close its lower end.
A second cylinder 7 is inserted into the first cylinder 6 so as to be slidable up and down, and a third cylinder 8 is inserted into the second cylinder 7 so as to be slidable up and down. The second cylinder 7 operates as a piston with respect to the first cylinder 6, and the third cylinder 8 operates with respect to the second cylinder 7, respectively. Vertical orifice grooves 7a and 8a are formed in the side surfaces of the second cylinder 7 and the third cylinder 8, respectively, and communicate the hydraulic chambers 9 and 10 formed in each cylinder with the outside. The upper end i8b of the third cylinder 8 is suspended from the upper plate 1 with a suspension bolt 11. That is, the hanging bolt 11 is connected to the hanging plate 1a fixed to the upper plate 1.
The stop plate 11 is inserted loosely through the hole 1b formed in the center of the stop plate 11.
Removal is stopped by a. Therefore, when the upper plate 1 and the lower plate 2 approach each other due to an impact load, the cylinder device 3 directs the water in the water pressure chambers 9 and 10 to the orifice groove 7a.
, 8a into the pool while contracting.
復元ばね４は、４つのシリンダ装置の四囲を囲むように
、５つずつ矩形に並べて外側に集中配置されている。復
元はね４は、２つの径の異なるもの４ａ、４ｂを上下に
組み合わせて成り、入れ子穴に縦方向に伸縮自在に組み
合わされた３つのガイド筒１２，１３，１４により軸線
方向に伸縮するようにガイドされている。そして、復元
ばね４は、上板１と下板２との間において、常時上板１
を所定の高さ位置に保持すべく、これを上方へ付勢して
いる。The restoring springs 4 are arranged in groups of five in a rectangular shape and concentrated on the outside so as to surround the four cylinder devices. The restoring spring 4 is made by combining two pieces 4a and 4b of different diameters vertically, and is made to expand and contract in the axial direction by three guide tubes 12, 13, and 14 that are combined in a nesting hole so that they can expand and contract in the vertical direction. are guided by. The restoring spring 4 is always connected to the upper plate 1 between the upper plate 1 and the lower plate 2.
is urged upward to maintain it at a predetermined height.
この実施例の緩衝装置３０は、原子力発電所内の冷却水
プールの底Ｂに設置される。この緩衝装置３０の上にキ
ャスクＣが載せ置かれ、キャスクＣへの使用済み核燃料
の収容作業が行なわれる。The buffer device 30 of this embodiment is installed at the bottom B of a cooling water pool in a nuclear power plant. A cask C is placed on the buffer device 30, and spent nuclear fuel is stored in the cask C.
キャスクＣは緩衝装置３０の上へ吊り降ろされ、使用済
み核燃料を装荷した後に吊り上げられるが。The cask C is lowered onto the shock absorber 30, loaded with spent nuclear fuel, and then lifted up.
吊り降ろし、吊り上げの作業中にキャスクＣが何らかの
原因で上板１上に落下すると、復元ばね４が圧縮されて
上板１が下降すると共に、シリンダ装置３が収縮して、
第２シリンダ７が第１シリンダ６内を、また第３シリン
ダ８が第２シリンダ７内を下降し、水圧室９，１０内の
水をオリフィス７ａ、８ａを介してプール内へ放出する
。このときの水の流通抵抗により衝撃を緩衝する。また
キャスクＣが、上板１の中心からずれた位置に吊り降ろ
され、キャスクＣと共に上板１が傾く力を受けると、上
板１の外側部に集中配置された復元はね４がこれに対抗
する。従って、上板１の傾きが阻止され、シリンダ装置
３のスティックが防止されることになる。復元はね４は
、上板１の中央部から離れた位置にあるから、大きなモ
ーメントで上板１の傾きを是正する方向の対抗力を発揮
する。If the cask C falls onto the upper plate 1 for some reason during the lifting and lowering operations, the restoring spring 4 is compressed, the upper plate 1 is lowered, and the cylinder device 3 is contracted.
The second cylinder 7 descends within the first cylinder 6, and the third cylinder 8 descends within the second cylinder 7, discharging the water within the hydraulic chambers 9, 10 into the pool via the orifices 7a, 8a. The impact is buffered by the water flow resistance at this time. Furthermore, when the cask C is suspended at a position offset from the center of the upper plate 1 and receives a force that tilts the upper plate 1 together with the cask C, the restoring springs 4 concentrated on the outer side of the upper plate 1 are to oppose. Therefore, the top plate 1 is prevented from tilting, and the cylinder device 3 is prevented from sticking. Since the restoring spring 4 is located away from the center of the upper plate 1, it exerts a counterforce in the direction of correcting the inclination of the upper plate 1 with a large moment.
また、シリンダ装置３は中央部に集中配置されるから、
上板１のわずかな傾きの影響から免れることができる。Furthermore, since the cylinder device 3 is centrally arranged,
It is possible to avoid the influence of a slight inclination of the upper plate 1.
上板１が多少傾いても、シリンダ装？ｉ３の吊りボルト
１１が吊り板１ａの孔１ｂ内を相対移動するから、シリ
ンダ装置３の軸心がずれることがない。Even if the upper plate 1 is slightly tilted, will it still work with the cylinder? Since the suspension bolt 11 of i3 moves relatively within the hole 1b of the suspension plate 1a, the axis of the cylinder device 3 does not shift.
（発明の効果）
以上のように本発明においては、シリンダ装置３と復元
はね４とを分離し、シリンダ装置３は、キャスクＣが載
せ置かれる中央付近に集中配置し、復元はね４は、シリ
ンダ装置３を囲むようにその外側に配置して水圧式衝撃
緩衝装置を構成したため、キャスクＣの重みでシリンダ
装置３が収縮する過程において、キャスクＣがｆｉｌ！
！緩衝装＠１０の中心からずれて上板１を傾ける力を与
えても、周辺に配置された復元はね４がこれに対抗する
ので、上板１が傾きにくい。従って、シリンダ装置３の
軸心がずれることがなく、その摺動部のスティック現象
の発生が防止されるので、伸縮動作をスムーズに行なえ
るという効果を奏する。(Effects of the Invention) As described above, in the present invention, the cylinder device 3 and the restoring spring 4 are separated, the cylinder device 3 is concentrated near the center where the cask C is placed, and the restoring spring 4 is Since the hydraulic shock absorber is arranged outside the cylinder device 3 so as to surround it, in the process of the cylinder device 3 contracting due to the weight of the cask C, the cask C fil!
! Even if a force is applied to tilt the upper plate 1 away from the center of the shock absorber @10, the restoring springs 4 arranged around the periphery counteract this force, so that the upper plate 1 is difficult to tilt. Therefore, the axial center of the cylinder device 3 does not shift, and the sticking phenomenon of the sliding portion is prevented, so that the expansion and contraction operations can be performed smoothly.
図面は本発明の一実施例を示すもので、第１図は衝撃緩
衝装置の正面図、第２図は衝撃緩衝装置の・ＩＬ面図、
第３図は第２図ＩＩＩ −ＩＩＩ線による縦断正面であ
り、左半分を収縮した状態で示した。
１・・・上板
２・・・下板
３・・・シリンダ装置
４・・・復元ばね
６・・・シリンダ
７．８・・・シリンダ（ピストン）
７ａ、８ａ・・・オリフィス
９．１０・・・水圧室
Ｂ・・・プール底
Ｃ・・・キャスク
第１図The drawings show an embodiment of the present invention, and FIG. 1 is a front view of the shock absorbing device, FIG. 2 is an IL side view of the shock absorbing device, and FIG.
FIG. 3 is a longitudinal cross-sectional front view taken along line III--III in FIG. 2, with the left half shown in a contracted state. 1... Upper plate 2... Lower plate 3... Cylinder device 4... Restoration spring 6... Cylinder 7.8... Cylinder (piston) 7a, 8a... Orifice 9.10. ...Hydraulic pressure chamber B...Pool bottom C...Cask Figure 1
Claims (1)
ル内の水中にあって、前記キャスクの落下による衝撃荷
重を直接受ける上板と、 前記プールの底上にあって、前記衝撃荷重を支持する下
板と、 前記衝撃荷重を受けて前記上板と下板とが互いに接近し
たときに、シリンダ内のピストンが移動して収縮し、内
部の水圧室内の水をオリフィスを介してプール内へ放出
する複数のシリンダ装置と、前記上板と下板との間にお
いて、常時上板を所定の高さ位置に保持すべく、これを
上方へ付勢する複数の復元ばねとを具備した衝撃緩衝装
置において、 前記複数のシリンダ装置は、前記キャスクが載せ置かれ
る中央付近に集中配置され、 前記複数の復元ばねは、前記複数のシリンダ装置を囲む
ようにその外側に配置されていることを特徴とする水圧
式衝撃緩衝装置。[Scope of Claims] An upper plate that is located underwater in a pool in which a cask for storing spent nuclear fuel is submerged and directly receives the impact load caused by the fall of the cask; When the lower plate supporting the load, and the upper plate and lower plate approach each other in response to the impact load, the piston in the cylinder moves and contracts, and the water in the internal hydraulic chamber is pumped through the orifice. A plurality of cylinder devices are provided for discharging into the pool, and a plurality of restoring springs are provided between the upper plate and the lower plate to bias the upper plate upward in order to maintain the upper plate at a predetermined height position at all times. In the shock absorbing device, the plurality of cylinder devices are arranged centrally near the center where the cask is placed, and the plurality of restoring springs are arranged outside the plurality of cylinder devices so as to surround the plurality of cylinder devices. A hydraulic shock absorber featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1312185A JP2832203B2 (en) | 1989-11-30 | 1989-11-30 | Hydraulic shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1312185A JP2832203B2 (en) | 1989-11-30 | 1989-11-30 | Hydraulic shock absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03172795A true JPH03172795A (en) | 1991-07-26 |
| JP2832203B2 JP2832203B2 (en) | 1998-12-09 |
Family
ID=18026242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1312185A Expired - Fee Related JP2832203B2 (en) | 1989-11-30 | 1989-11-30 | Hydraulic shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2832203B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009180349A (en) * | 2008-01-31 | 2009-08-13 | Hiroshima Univ | Damping device |
| JP2009282025A (en) * | 2008-05-06 | 2009-12-03 | Ge-Hitachi Nuclear Energy Americas Llc | Apparatus and method for damping nuclear reactor component |
| CN108087471A (en) * | 2018-01-23 | 2018-05-29 | 南京理工大学 | A kind of twin ring spring buffer unit |
-
1989
- 1989-11-30 JP JP1312185A patent/JP2832203B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009180349A (en) * | 2008-01-31 | 2009-08-13 | Hiroshima Univ | Damping device |
| JP2009282025A (en) * | 2008-05-06 | 2009-12-03 | Ge-Hitachi Nuclear Energy Americas Llc | Apparatus and method for damping nuclear reactor component |
| CN108087471A (en) * | 2018-01-23 | 2018-05-29 | 南京理工大学 | A kind of twin ring spring buffer unit |
| CN108087471B (en) * | 2018-01-23 | 2023-11-28 | 南京理工大学 | Duplex annular spring buffer device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2832203B2 (en) | 1998-12-09 |
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