JPS6334439B2 - - Google Patents
Info
- Publication number
- JPS6334439B2 JPS6334439B2 JP54027335A JP2733579A JPS6334439B2 JP S6334439 B2 JPS6334439 B2 JP S6334439B2 JP 54027335 A JP54027335 A JP 54027335A JP 2733579 A JP2733579 A JP 2733579A JP S6334439 B2 JPS6334439 B2 JP S6334439B2
- Authority
- JP
- Japan
- Prior art keywords
- cask
- cylinder
- fins
- heat dissipation
- flange
- 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
- 230000017525 heat dissipation Effects 0.000 claims description 17
- 239000002915 spent fuel radioactive waste Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 description 19
- 230000002093 peripheral effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 230000005855 radiation Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000008646 thermal stress Effects 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
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
【発明の詳細な説明】
本発明は使用済核燃料輸送容器における冷却フ
イン構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling fin structure in a spent nuclear fuel transport container.
使用済核燃料の輸送には、一般にキヤスクと略
称されている使用済核燃料輸送容器が用いられて
いる。このキヤスクは、その中に収納された使用
済核燃料から発生する熱量と、輸送中の日射な
ど、キヤスク外からキヤスク内に入る入熱量と
を、外界に放熱するようにすることにより、環境
温度38℃においてキヤスク表面最大温度が82℃以
下と規定された法規上の制限を満足し得るように
「製作しなければならない。」
そこで従来は長大なキヤスクの外筒体の外周面
に、全周面に亘つて短冊状に成形した多数のフイ
ンを直接植設し、このフインを適宜方向にねじ曲
げることにより冷却用フインを構成し、前述の放
熱を図つている。 A spent nuclear fuel transport container, generally abbreviated as a cask, is used to transport spent nuclear fuel. This cask radiates heat generated from the spent nuclear fuel stored inside the cask and heat input into the cask from outside the cask, such as solar radiation during transportation, to the outside world. The cask must be manufactured in such a way that it satisfies the legal restriction stipulating that the maximum surface temperature of the cask be 82°C or less. Therefore, in the past, the outer circumferential surface of the long outer cylindrical body of the cask was A large number of fins shaped into strips are directly implanted over the fins, and the fins are twisted in appropriate directions to form cooling fins, thereby achieving the heat dissipation described above.
前記キヤスクは一般に長さ約５ｍ、直径約１ｍ
そしてその重量は、前記キヤスク外筒体と内筒体
との間などにγ線を遮蔽する鉛や中性子を遮蔽す
る合成樹脂などが挿入されているため、数トン以
上もある。 The cask generally has a length of about 5 m and a diameter of about 1 m.
The weight of the cask is several tons or more because lead to shield gamma rays and synthetic resin to shield neutrons are inserted between the outer cask body and the inner cylinder.
従つて上記従来のもののように、フインをキヤ
スク外筒体の外周面に全周面に亘つて直接植設し
た構成の冷却フイン構造では、その製造が煩雑で
あるばかりでなく所期の冷却効果が得にくいなど
問題があるのが現状である。 Therefore, with a cooling fin structure in which the fins are directly implanted over the entire circumference of the outer circumferential surface of the cask outer cylinder, as in the conventional structure described above, not only is manufacturing complicated, but the desired cooling effect is not achieved. The current situation is that it is difficult to obtain.
本発明は、上述の現状に鑑みなされたもので、
前記問題点をことごとく解決した極めて有効適切
な使用済核燃料輸送容器を提供することを目的と
するものである。 The present invention was made in view of the above-mentioned current situation, and
The object of the present invention is to provide an extremely effective and suitable spent nuclear fuel transport container that solves all of the above problems.
そしてその特徴とするところは、本発明の冷却
フイン構造を構成するにあたり、
１ 「フイン付の筒体」の内径をキヤスク外筒体
の外径よりやや大とし、全長をキヤスク外筒体
の全長を複数個に分割した長さとし、
２ 上記筒体の外周面に嵌合固定し得る鍔部を内
周端縁に有する放熱フインを、前記筒体の外周
面に間隔をおいて取り付け、
３ 合成樹脂など中性子遮蔽効果の優れた材料に
より成形され、内径を前記放熱フインの前記鍔
部外周面に嵌合し得る寸法とし、肉厚を中性子
を遮蔽するに十分な厚みとした中性子遮蔽部材
を前記各放熱フイン間に嵌着し、
４ 前記放熱フインを銅など熱伝導率の優れた金
属により形成した、
ことにより、使用済核燃料輸送容器（キヤスク）
における冷却フイン構造を著しく容易に得ること
ができるようにした点にある。 The characteristics of the cooling fin structure of the present invention are as follows: 1. The inner diameter of the finned cylinder is slightly larger than the outer diameter of the cask outer cylinder, and the total length is the same as the total length of the cask outer cylinder. is divided into a plurality of lengths, 2 heat dissipation fins having a flange on the inner peripheral edge that can be fitted and fixed to the outer peripheral surface of the cylindrical body are attached at intervals to the outer peripheral surface of the cylindrical body, 3. synthesis The neutron shielding member is molded from a material having an excellent neutron shielding effect such as resin, has an inner diameter that can be fitted to the outer peripheral surface of the flange of the heat dissipation fin, and has a wall thickness that is sufficient to shield neutrons. 4. The radiation fins are made of a metal with excellent thermal conductivity such as copper, and the spent nuclear fuel transport container (cask) is fitted between each radiation fin.
The cooling fin structure can be obtained extremely easily.
以下本発明のキヤスクにおける冷却フイン構造
を実施例により図面を参照しつつ説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS The cooling fin structure of a cask according to an embodiment of the present invention will be described below with reference to the drawings.
第１図〜第４図に示す如く、本発明の冷却フイ
ン構造Ｅは、内径ａをキヤスクＧの外筒体G1の
外径ｂよりやや大とし、全長L1を前記外筒体G1
の全長LGを複数個に分割した長さとした筒体１
と、この筒体１の外周面に嵌合固定し得る鍔部２
ａを内周縁に設けた放熱フイン２と、この放熱フ
イン２の鍔部２ａの外周面に嵌合でき肉厚Ｃを中
性子を遮蔽するに十分な厚み本実施例においては
前記放熱フイン２の高さｄの1/2とした中性子遮
蔽部材３とから成り、前記筒体１の外周面に前記
放熱フイン２を順次列設すると共に、この各放熱
フイン２間に前記中性子遮蔽部材３を嵌着するこ
とにより構成されている。 As shown in FIGS. 1 to 4, the cooling fin structure E of the present invention has an inner diameter a slightly larger than an outer diameter b of the outer cylinder G 1 of the cask G, and a total length L 1 of the outer cylinder G 1 .
Cylindrical body 1 whose length is obtained by dividing the total length L G into multiple pieces.
and a flange 2 that can be fitted and fixed to the outer circumferential surface of the cylindrical body 1.
The heat dissipation fin 2 is provided with a on the inner peripheral edge, and the thickness C is sufficient to fit on the outer peripheral surface of the flange 2a of the heat dissipation fin 2 and to shield neutrons.In this embodiment, the height of the heat dissipation fin 2 is and a neutron shielding member 3 whose diameter is 1/2 of d.The heat dissipation fins 2 are sequentially arranged on the outer peripheral surface of the cylinder 1, and the neutron shielding member 3 is fitted between each of the heat dissipation fins 2. It consists of:
前記筒体１は、ステンレス鋼あるいは炭素鋼に
より成形し、放熱フイン２は、鋼など熱伝導率の
優れた金属により形成されている。また前記中性
子遮蔽部材３は、合成樹脂など中性子遮蔽効果の
優れた材料により形成されている。 The cylindrical body 1 is made of stainless steel or carbon steel, and the radiation fins 2 are made of a metal with excellent thermal conductivity such as steel. Further, the neutron shielding member 3 is made of a material having an excellent neutron shielding effect, such as synthetic resin.
前記放熱フイン２の環状フイン部２ｂには、第
３図ａ，ｂ，ｃに示す如くスリツト２ｃがそれぞ
れ設けられている。この各スリツト２ｃは、この
放熱フイン２を前記筒体１の外周面に嵌合固着す
るに際し、その鍔部２ａを筒体１の外周面に熔接
する場合に発生する熱応力により、前記環状フイ
ン部２ｂが変形するのを防止すると共に、第３図
ｂ，ｃに示す如く、このスリツト２ｃに板状部材
２ｄをそれぞれ嵌着することにより、各環状フイ
ン部２ｂ間を流れる空気の流れを、部分的に遮断
し空気の流れが外方に向つて散逸するようにし
て、環状フイン部２ｂの表面方向温度が均一化さ
れるようにしてある。 The annular fin portion 2b of the heat dissipation fin 2 is provided with slits 2c, as shown in FIGS. 3a, b, and c, respectively. These slits 2c are formed by thermal stress generated when the flange 2a is welded to the outer circumference of the cylinder 1 when the heat dissipation fin 2 is fitted and fixed to the outer circumference of the cylinder 1. In addition to preventing the portions 2b from deforming, as shown in FIGS. 3b and 3c, by fitting the plate members 2d into the slits 2c, the flow of air between the annular fin portions 2b is reduced. The temperature in the surface direction of the annular fin portion 2b is made uniform by partially blocking the air flow and dissipating the air flow outward.
なお、前記板状部材２ｄの高さは、環状フイン
部２ｂの高さよりもやや低い方がよい。 Note that the height of the plate member 2d is preferably slightly lower than the height of the annular fin portion 2b.
次に第１図および第２図を参照しつつ上述した
冷却フイン構造Ｅの組立順序を簡単に説明する。
すなわち
１ まず組立用ポジシヨナー（図示しない）上に
前記筒体１を図示の如く立てて載置し、
２ 次にあらかじめ鍔部２ａを絞り加工した前記
放熱フイン２を、鍔部２ａを上にして筒体１に
上部から嵌入し、位置決めした後前記鍔部２ａ
と筒体１の外周面とを点熔接して固定し、
３ つづいてこの鍔部２ａの外周面にエポキシ系
など耐熱性を有する接着剤を塗布した後前記中
性子遮蔽部材３を筒体１の上方から挿入し鍔部
２ａに固定する。 Next, the assembly order of the cooling fin structure E described above will be briefly explained with reference to FIGS. 1 and 2.
That is, 1. First, place the cylindrical body 1 upright as shown on an assembly positioner (not shown), and 2. Place the heat dissipation fin 2 with the flange 2a drawn in advance, with the flange 2a facing upward. After fitting into the cylinder 1 from above and positioning, the flange 2a
and the outer peripheral surface of the cylindrical body 1 are fixed by point welding, and then a heat-resistant adhesive such as an epoxy adhesive is applied to the outer periphery of the flange 2a, and then the neutron shielding member 3 is attached to the cylindrical body 1. Insert it from above and fix it to the collar 2a.
４ 上述の作業を順次繰り返えし放熱フイン２と
中性子遮蔽部材３を筒体１の上端まで取り着け
ることにより組立を完了するものである。4. The above-mentioned operations are repeated in order to complete the assembly by attaching the heat radiation fins 2 and the neutron shielding member 3 to the upper end of the cylinder 1.
なお、冷却フイン構造Ｅをキヤスク外筒体G1
に取付ける具体的な方法としては、一例として第
５図に示すように、冷却フイン構造Ｅの上下に鍔
状のエンドプレートＸを設け、先ず冷却フイン構
造Ｅを外筒体外周に嵌入する前にエンドプレート
Ｘを外筒体G1に嵌入、位置決めし、エンドプレ
ート内径部と外筒の外周面を溶接により固定す
る。その後複数組の冷却フイン構造を順次その上
部に挿入し、挿入後了後エンドプレートＹを嵌
入、位置決めしてエンドプレートＸと同様に溶接
により外筒外周面に固定する。エンドプレートは
ステンレス鋼あるいは炭素鋼より成りキヤスク落
下の衝撃に耐える程度の強度を有しているので、
冷却フイン構造Ｅを両端から十分押え付けること
ができる。またはこれに代る方法として、筒体１
の両端部内径２箇所を溶接により外筒外周面に固
定する方法も考えられる。 Note that the cooling fin structure E is the cask outer cylinder body G 1
As an example, as shown in FIG. 5, a specific method for attaching the cooling fin structure E is to provide a brim-shaped end plate X above and below the cooling fin structure E, and first, before fitting the cooling fin structure E to the outer periphery of the outer cylinder body. The end plate X is inserted into the outer cylinder G1 and positioned, and the inner diameter part of the end plate and the outer peripheral surface of the outer cylinder are fixed by welding. Thereafter, a plurality of sets of cooling fin structures are sequentially inserted into the upper part, and after the insertion, the end plate Y is fitted and positioned, and similarly to the end plate X, it is fixed to the outer peripheral surface of the outer cylinder by welding. The end plate is made of stainless steel or carbon steel and is strong enough to withstand the impact of a falling cask.
The cooling fin structure E can be sufficiently pressed from both ends. Or as an alternative method, the cylindrical body 1
It is also conceivable to fix the two ends of the inner diameter to the outer circumferential surface of the outer cylinder by welding.
本発明は上述の如く構成したから、次の如き効
果を奏する。 Since the present invention is configured as described above, it has the following effects.
すなわち本発明は、本冷却フイン構造の筒体の
全長を、キヤスク外筒体の全長を複数個に分割し
た長さとしたから、本冷却フイン構造をキヤスク
の外筒体の外周に次々と嵌入するだけで、キヤス
クの外筒体に放熱フインを装着することができ、
従つてキヤスク製作工程を著しく短縮「すること
ができる。」
また放熱フインには鍔部を形成したから、位置
決めが容易で各放熱フイン間寸法を一定とするこ
とができ、キヤスクの性能向上および性能の均一
化を図ることができる。 That is, in the present invention, since the total length of the cylinder of the cooling fin structure is the length obtained by dividing the total length of the cask outer cylinder into a plurality of parts, the cooling fin structure is successively fitted onto the outer periphery of the cask outer cylinder. Heat dissipation fins can be attached to the outer cylinder of the cask by simply
Therefore, the cask manufacturing process can be significantly shortened. Also, since the heat dissipation fins have a flange, positioning is easy and the dimensions between each heat dissipation fin can be kept constant, improving the performance of the cask. can be made uniform.
さらに本発明は、各放熱フイン間に中性子遮蔽
効果を有する中性子遮蔽部材を嵌着したので、キ
ヤスクの対放射能性能を著しく向上することがで
きるなどその効果は著しく大きい。 Further, in the present invention, since a neutron shielding member having a neutron shielding effect is fitted between each heat dissipating fin, the effects of the invention are significant, such as significantly improving the radiation resistance performance of the cask.
図面は本発明の実施例を示すもので、第１図は
本冷却フイン構造の一部断面正面図、第２図ａは
筒体、ｂは放熱フイン、ｃは中性子遮蔽部材のそ
れぞれ一部断面正面図、第３図ａ，ｂ，ｃはそれ
ぞれ放熱フインを示すもので、ａは平面図、ｂは
正面図、ｃは一部切欠した斜視図、第４図は本冷
却フイン構造をキヤスクの外筒体にそれぞれ取り
付けた状態を示す一部断面正面図である、第５図
は筒体をキヤスク外筒体に取付ける例を示す一部
側断面図である。
１……筒体、２……放熱フイン、３……中性子
遮蔽部材。
The drawings show an embodiment of the present invention, and FIG. 1 is a partial cross-sectional front view of the present cooling fin structure, FIG. The front view, Figures 3a, b, and c respectively show the heat dissipation fins, where a is a plan view, b is a front view, c is a partially cutaway perspective view, and Figure 4 shows the cooling fin structure of the cask. FIG. 5 is a partially sectional front view showing the state in which the cylinders are attached to the outer cylinder; FIG. 5 is a partially sectional side view showing an example of how the cylinders are attached to the cask outer cylinder. 1... Cylindrical body, 2... Heat dissipation fin, 3... Neutron shielding member.
Claims (1)
筒体の外径よりもやや大とし、全長を前記外筒体
の全長を複数個に分割した長さとした筒体で覆
い、この筒体の外周面に、鍔部を内周縁に設けた
放熱フインを多数順次列設すると共に、鍔部の外
周面に嵌合でき、肉厚を中性子を遮蔽するに十分
な厚みとした中性子遮蔽部材を各放熱フイン間に
嵌着した使用済核燃料輸送容器。1. The outer circumference of the cask outer cylinder is covered with a cylinder whose inner diameter is slightly larger than the outer diameter of the cask outer cylinder and whose total length is equal to the total length of the outer cylinder divided into a plurality of pieces, and the outer circumference of this cylinder is A large number of heat dissipating fins each having a flange on the inner periphery are sequentially arranged on the outer circumferential surface, and a neutron shielding member that can fit onto the outer circumferential surface of the flange and has a wall thickness sufficient to shield neutrons is provided on each of the fins. A spent nuclear fuel transport container fitted between heat dissipation fins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2733579A JPS55119095A (en) | 1979-03-09 | 1979-03-09 | Cask for spent nuclear fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2733579A JPS55119095A (en) | 1979-03-09 | 1979-03-09 | Cask for spent nuclear fuel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55119095A JPS55119095A (en) | 1980-09-12 |
| JPS6334439B2 true JPS6334439B2 (en) | 1988-07-11 |
Family
ID=12218186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2733579A Granted JPS55119095A (en) | 1979-03-09 | 1979-03-09 | Cask for spent nuclear fuel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55119095A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58187799U (en) * | 1982-06-09 | 1983-12-13 | 三菱重工業株式会社 | Spent nuclear fuel transport container |
-
1979
- 1979-03-09 JP JP2733579A patent/JPS55119095A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55119095A (en) | 1980-09-12 |
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