JP2003121586A - Spent fuel storage rack - Google Patents
Spent fuel storage rackInfo
- Publication number
- JP2003121586A JP2003121586A JP2001321386A JP2001321386A JP2003121586A JP 2003121586 A JP2003121586 A JP 2003121586A JP 2001321386 A JP2001321386 A JP 2001321386A JP 2001321386 A JP2001321386 A JP 2001321386A JP 2003121586 A JP2003121586 A JP 2003121586A
- Authority
- JP
- Japan
- Prior art keywords
- fuel storage
- storage rack
- spent fuel
- floor
- bolts
- 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
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 Cell (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は原子力発電施設の使
用済燃料貯蔵設備に係わり、特に、燃料貯蔵プール内で
使用済燃料集合体を収納する使用済燃料貯蔵ラックに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spent fuel storage facility of a nuclear power generation facility, and more particularly to a spent fuel storage rack for storing spent fuel assemblies in a fuel storage pool.
【０００２】[0002]
【従来の技術】原子力発電施設で使用された使用済燃料
集合体は、使用済燃料貯蔵ラックで貯蔵される。使用済
燃料貯蔵ラックは、安全上重要な機器であり、地震に対
する健全性が強く要求されている。このため、特開平7-
248399公報記載の公知例に見られるように、燃料貯蔵ラ
ックの本体は据付け床にボルトにより固定されている。Spent fuel assemblies used in nuclear power plants are stored in spent fuel storage racks. The spent fuel storage rack is a safety-critical device, and its soundness against earthquakes is strongly required. For this reason,
As seen in the known example described in the publication 248399, the main body of the fuel storage rack is fixed to the installation floor by bolts.
【０００３】水平方向に地震動を受けた場合、床にボル
トによって固定される燃料貯蔵ラックには大きな力が働
き、これに耐えるよう燃料貯蔵ラックの本体、およびボ
ルトは十分剛に製作されている。When a horizontal earthquake motion occurs, a large force acts on the fuel storage rack fixed to the floor by bolts, and the main body of the fuel storage rack and the bolts are sufficiently rigid to withstand this.
【０００４】[0004]
【発明が解決しようとする課題】前述の使用済燃料貯蔵
ラックにおいては、燃料貯蔵ラックの構造を簡易化する
には制約があった。本発明は、構造に要求される地震に
対する強度を緩和させるとともに、耐震性能を向上させ
るに好適な使用済燃料貯蔵ラックを提供することにあ
る。In the above-mentioned spent fuel storage rack, there are restrictions in simplifying the structure of the fuel storage rack. An object of the present invention is to provide a spent fuel storage rack suitable for improving the seismic performance as well as reducing the earthquake resistance required for the structure.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明によれば、使用済燃料貯蔵ラックをボルト
等により据付け床に固定することなく設置することによ
り、据付け床から燃料貯蔵ラックに伝達される地震動が
軽減される。地震動による水平荷重を受けた場合の燃料
貯蔵ラックのロッキング振動に対しては、制動機構を有
する制動装置をラック底面に設置し、過大な振動を抑制
する。このように、燃料貯蔵ラックのロッキング振動を
許容し、さらに燃料貯蔵ラックの底面に制動装置を設置
することにより、地震荷重を低減し，耐震上合理的な構
造の使用済燃料貯蔵ラックを提供することができる。In order to achieve the above object, according to the present invention, the spent fuel storage rack is installed without being fixed to the installation floor with bolts or the like, so that the fuel storage from the installation floor can be stored. Seismic motion transmitted to the rack is reduced. For rocking vibration of the fuel storage rack when it receives a horizontal load due to earthquake motion, a braking device having a braking mechanism is installed on the bottom of the rack to suppress excessive vibration. In this way, the rocking vibration of the fuel storage rack is allowed, and by installing the braking device on the bottom surface of the fuel storage rack, the seismic load is reduced, and a spent fuel storage rack with a structure that is rational in terms of earthquake resistance is provided be able to.
【０００６】これにより使用済燃料貯蔵ラックに要求さ
れる耐震強度を緩和し、燃料貯蔵ラックの構造のさらな
る合理化、据付け施工を簡略化した使用済燃料貯蔵ラッ
クを実現できる。As a result, the seismic resistance required of the spent fuel storage rack can be relaxed, the structure of the fuel storage rack can be further rationalized, and the spent fuel storage rack with simplified installation can be realized.
【０００７】[0007]
【発明の実施の形態】以下、本発明の実施例について図
面を参照し説明する。図１は本発明の使用済燃料貯蔵ラ
ックの一実施例を示す立面図である。燃料貯蔵ラック１
は燃料貯蔵ラックの底部の制動装置２を介して据付け床
３に設置される。制動装置２は燃料貯蔵ラック１の上下
方向の運動を許容するものである。このために、地震を
受けた際に、燃料貯蔵ラックが据付け床3にボルト等で
固定された場合と比較して、地震動が直接燃料貯蔵ラッ
ク1に伝達されず、燃料貯蔵ラック1の構成部材に発生す
る荷重も小さい。さらに制動装置2は、燃料貯蔵ラック1
の上下方向の運動に対して抵抗力を生じさせるものであ
る。これにより、過大なロッキング振動を防ぐととも
に、燃料貯蔵ラック１と据付け床3が接触する際の衝撃
力を緩衝することができる。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an elevation view showing an embodiment of a spent fuel storage rack of the present invention. Fuel storage rack 1
Is installed on the installation floor 3 via the braking device 2 at the bottom of the fuel storage rack. The braking device 2 allows the vertical movement of the fuel storage rack 1. Therefore, when an earthquake is received, compared with the case where the fuel storage rack is fixed to the installation floor 3 with bolts or the like, seismic motion is not directly transmitted to the fuel storage rack 1, and the constituent members of the fuel storage rack 1 are The load generated in the is also small. Furthermore, the braking device 2 is a fuel storage rack 1
A resistance force is generated against the vertical movement of the. As a result, excessive rocking vibration can be prevented and the impact force when the fuel storage rack 1 and the installation floor 3 come into contact can be buffered.
【０００８】制動装置２の詳細構造の縦断面図を図２に
示す。支持筒21は燃料貯蔵ラック1に固定されており、
その自重を固定板23に伝えている自重支持部材である。
一方、抵抗板22は固定板23と一体をなし、固定板23は据
付け床に固定される。抵抗板22と固定板23とは狭いすき
間を介して対向しており、ここは燃料貯蔵プールの水で
満たされている。このため、抵抗板22と固定板23とが相
対的に運動しようとした場合には、抵抗板22と固定板23
とのすき間に水が流れ、流体抵抗力が生じる。この流体
抵抗力は、燃料貯蔵ラック1のロッキング振動を抑制す
る方向に働く。よって、燃料貯蔵ラックに加わる地震荷
重が緩和されるとともに、ロッキング振動を生じた場合
においても過大な振動を防止することができる。FIG. 2 is a vertical sectional view showing the detailed structure of the braking device 2. The support cylinder 21 is fixed to the fuel storage rack 1,
A weight supporting member that transmits its own weight to the fixed plate 23.
On the other hand, the resistance plate 22 is integrated with the fixed plate 23, and the fixed plate 23 is fixed to the installation floor. The resistance plate 22 and the fixed plate 23 face each other through a narrow gap and are filled with water in the fuel storage pool. Therefore, when the resistance plate 22 and the fixed plate 23 try to move relative to each other, the resistance plate 22 and the fixed plate 23
Water flows in the gap and creates a fluid resistance force. This fluid resistance acts in the direction of suppressing the rocking vibration of the fuel storage rack 1. Therefore, it is possible to reduce the seismic load applied to the fuel storage rack and prevent excessive vibration even when rocking vibration occurs.
【０００９】図３は、本発明の他の実施例を示す立面図
である。燃料貯蔵ラック１の自重は支持部材４で支持さ
れているが、上下に運動することは拘束されない。制動
装置２は支持筒21と抵抗板22から構成されるダンパ機構
となっている。抵抗板22は燃料貯蔵ラック１に、支持筒
21は据付け床３側に取り付けられているために、燃料貯
蔵ラック1がロッキング振動し、上下に運動すると抵抗
板22と支持筒21の間の狭いすき間を通して流体が流れる
ために、制動装置２に流体抵抗力が生じる。この抵抗力
によって燃料貯蔵ラック1には、地震時においても過大
な振動を生じることなく、燃料貯蔵ラックを構成する部
材に大きな荷重が作用することはない。FIG. 3 is an elevational view showing another embodiment of the present invention. The self-weight of the fuel storage rack 1 is supported by the support member 4, but the vertical movement is not restricted. The braking device 2 is a damper mechanism including a support cylinder 21 and a resistance plate 22. The resistance plate 22 is attached to the fuel storage rack 1 and the supporting cylinder.
Since 21 is attached to the installation floor 3 side, the fuel storage rack 1 rocks and vibrates. When the fuel storage rack 1 moves up and down, the fluid flows through the narrow gap between the resistance plate 22 and the support cylinder 21. Fluid resistance occurs. Due to this resistance force, the fuel storage rack 1 does not generate excessive vibration even during an earthquake, and a large load does not act on the members constituting the fuel storage rack.
【００１０】[0010]
【発明の効果】本発明によれば、地震による水平振動を
受けた場合、燃料貯蔵ラックにはロッキング振動が生じ
て燃料貯蔵ラック底面が床から浮き上がろうとするが、
制動装置に流体抵抗力により制動力が生じるため、燃料
貯蔵ラックの振動を低減する効果がある。また、燃料貯
蔵ラックがロッキング振動することにより、据付け床に
固定された場合と比較して、燃料貯蔵ラック固定部、ボ
ルトおよび燃料貯蔵ラック本体に作用する荷重を低減
し、構造を簡略化することができる。据付け床に固定さ
れた場合と比較して地震荷重が緩和されるとともに、ロ
ッキング振動を低減することができるので、使用済燃料
貯蔵ラックの本体に要求される強度を小さくすることが
でき、構造を簡素化するとともに、据付けの施工が簡易
にすることができる。According to the present invention, when a horizontal vibration due to an earthquake is received, rocking vibration occurs in the fuel storage rack, and the bottom surface of the fuel storage rack tries to float up from the floor.
Since the braking force is generated in the braking device by the fluid resistance force, there is an effect of reducing the vibration of the fuel storage rack. In addition, the rocking vibration of the fuel storage rack reduces the load acting on the fuel storage rack fixing part, the bolts, and the fuel storage rack main body, and simplifies the structure, compared with the case where the fuel storage rack is fixed to the installation floor. You can Compared to the case where it is fixed to the fixed floor, the seismic load is mitigated and rocking vibration can be reduced, so the strength required for the main body of the spent fuel storage rack can be reduced and the structure can be reduced. This simplifies and simplifies the installation work.
【００１１】また、制動装置に働くのは、燃料貯蔵ラッ
クの上下方向の振動に対する抵抗力であることから、上
下の地震動に対しても同等の抵抗力を期待することがで
きる。Further, since the braking device acts on the vertical vibration of the fuel storage rack, it is possible to expect an equivalent resistance to vertical earthquake motions.
【図１】本発明の一実施例を示す立面図である。FIG. 1 is an elevational view showing an embodiment of the present invention.
【図２】制動装置の詳細構造を示す縦断面図である。FIG. 2 is a vertical sectional view showing a detailed structure of a braking device.
【図３】本発明の他の実施例を示す立面図である。FIG. 3 is an elevational view showing another embodiment of the present invention.
１…燃料貯蔵ラック、２…制動装置、３…据付け床、４
…支持部材、21…支持筒、22…抵抗板、23…固定板。1 ... Fuel storage rack, 2 ... Braking device, 3 ... Installation floor, 4
... Support member, 21 ... Support cylinder, 22 ... Resistance plate, 23 ... Fixed plate.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 ▲高▼橋 敏依 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所原子力事業部内 (72)発明者 岩倉 成良 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所原子力事業部内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor ▲ Takahashi Toshii 3-1-1 Sachimachi, Hitachi City, Ibaraki Prefecture Stock Association Hitachi, Ltd. Nuclear Business Division (72) Inventor Shigeyoshi Iwakura 3-1-1 Sachimachi, Hitachi City, Ibaraki Prefecture Stock Association Hitachi, Ltd. Nuclear Business Division
Claims (2)
貯蔵ラックにおいて、燃料貯蔵ラック底部に取り付けら
れる自重を支持する自重支持部材と、自重支持部材と狭
いすき間をもって対向する据付け床側に取り付けられる
部材からなる制動装置を介して燃料貯蔵ラックを設置し
たことを特徴とする使用済燃料貯蔵ラック。1. A spent fuel storage rack containing a spent fuel assembly, which is attached to a bottom of a fuel storage rack to support its own weight, and a self-weight support member which is attached to the installation floor side facing the self-weight support member with a narrow gap. The spent fuel storage rack is characterized in that a fuel storage rack is installed via a braking device made of a member.
おいて、制動装置として、自重を支える支持部材に併設
するダンパ機構としたことを特徴とする使用済燃料貯蔵
ラック。2. The spent fuel storage rack according to claim 1, wherein the braking device is a damper mechanism provided along with a supporting member for supporting its own weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001321386A JP2003121586A (en) | 2001-10-19 | 2001-10-19 | Spent fuel storage rack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001321386A JP2003121586A (en) | 2001-10-19 | 2001-10-19 | Spent fuel storage rack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003121586A true JP2003121586A (en) | 2003-04-23 |
Family
ID=19138608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001321386A Pending JP2003121586A (en) | 2001-10-19 | 2001-10-19 | Spent fuel storage rack |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003121586A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006162595A (en) * | 2004-11-12 | 2006-06-22 | Mitsubishi Heavy Ind Ltd | Storage structure |
| JP2010139508A (en) * | 2004-11-12 | 2010-06-24 | Mitsubishi Heavy Ind Ltd | Storage structure |
| JP2011149904A (en) * | 2010-01-25 | 2011-08-04 | Mitsubishi Heavy Ind Ltd | Rack for storing nuclear fuel |
-
2001
- 2001-10-19 JP JP2001321386A patent/JP2003121586A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006162595A (en) * | 2004-11-12 | 2006-06-22 | Mitsubishi Heavy Ind Ltd | Storage structure |
| JP2010139508A (en) * | 2004-11-12 | 2010-06-24 | Mitsubishi Heavy Ind Ltd | Storage structure |
| JP2011149904A (en) * | 2010-01-25 | 2011-08-04 | Mitsubishi Heavy Ind Ltd | Rack for storing nuclear fuel |
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