JPS6154200B2 - - Google Patents
Info
- Publication number
- JPS6154200B2 JPS6154200B2 JP55055078A JP5507880A JPS6154200B2 JP S6154200 B2 JPS6154200 B2 JP S6154200B2 JP 55055078 A JP55055078 A JP 55055078A JP 5507880 A JP5507880 A JP 5507880A JP S6154200 B2 JPS6154200 B2 JP S6154200B2
- Authority
- JP
- Japan
- Prior art keywords
- pin
- holes
- inner diameter
- container
- lid
- 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
- 239000000463 material Substances 0.000 claims description 11
- 239000002915 spent fuel radioactive waste Substances 0.000 claims description 9
- 230000002265 prevention Effects 0.000 claims 1
- 230000005855 radiation Effects 0.000 description 3
- 206010073306 Exposure to radiation Diseases 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000007789 sealing 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
- Closures For Containers (AREA)
Description
【発明の詳細な説明】
本発明は使用済核燃料輸送容器の上蓋取付け構
造に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a top cover attachment structure for a spent nuclear fuel transport container.
使用済核燃料を再処理工場に輸送するために使
用される容器は、(イ)通常時に放射線の洩れが許容
値以下であること、(ロ)落下事故等の事故時でも破
損等による放射線の洩れが事故時の許容値以下で
あること、(ハ)放熱性が良好であること、(ニ)軽量で
コンパクトにしかも製作が容易な構造であること
等が要求される。そして、従来かかる容器は一般
に第１図にその概要を示すように内筒１と外筒２
の間に鉛等の遮蔽材３を配置し、外筒２の外側に
多数の放熱フイン４を設けかつその上端に上部筒
７を有する容器本体Ａと、前記内筒１および外筒
２の下部に夫々溶着固定される内筒底板５と外筒
底板６よりなる底蓋Ｂと上蓋８とにより構成され
ている。そして、この上蓋８は上部筒７上に乗せ
られ、その円周上に複数個のボルト９をねじ込ん
で取り付けられ、容器内の耐圧，密封を保持する
ようにしている。１０，１０′は上部および下部
に設けられた緩衝材である。 Containers used to transport spent nuclear fuel to reprocessing plants must (a) leak radiation below the allowable level under normal conditions, and (b) prevent radiation from leaking due to breakage even in the event of an accident such as a fall accident. (c) have good heat dissipation, and (d) have a structure that is lightweight, compact, and easy to manufacture. Conventionally, such a container generally has an inner cylinder 1 and an outer cylinder 2, as shown in FIG.
A container main body A having a shielding material 3 such as lead placed therebetween, a large number of heat dissipating fins 4 provided on the outside of an outer cylinder 2, and an upper cylinder 7 at its upper end, and the lower parts of the inner cylinder 1 and outer cylinder 2. It is composed of a bottom cover B and an upper cover 8, which are made up of an inner cylinder bottom plate 5 and an outer cylinder bottom plate 6, which are welded and fixed to the inner cylinder bottom plate 5 and the outer cylinder bottom plate 6, respectively. The upper lid 8 is placed on the upper cylinder 7 and attached by screwing a plurality of bolts 9 around its circumference to maintain pressure resistance and sealing within the container. Reference numerals 10 and 10' denote cushioning materials provided at the upper and lower parts.
ところで、かかる容器は原発建屋内では図示の
状態（直立）で輸送されるため、その高さＨは出
来るだけ小さくすることが好ましい。 By the way, since such a container is transported in the illustrated state (upright) inside the nuclear power plant building, it is preferable to make the height H as small as possible.
一方、かかる上蓋８の開閉作業は被曝等の問題
からも簡単かつ迅速に行なう必要がある。しかし
ながら、前記従来の上蓋取付構造においては、上
蓋８の厚み“Ｔ”は耐圧等の問題から一定のもの
とせねばならず、かつその開閉作業も複数個のボ
ルト９を一つ一つ廻して取外し又は締付けしなけ
ればならないため、輸送上の問題と併せて開閉作
業は多大の時間と労力を必要とし、特に作業員の
被曝上大きな問題となつている。 On the other hand, it is necessary to open and close the upper lid 8 easily and quickly due to problems such as exposure to radiation. However, in the above conventional top cover mounting structure, the thickness "T" of the top cover 8 must be constant due to pressure resistance and other issues, and the opening/closing operation is also done by turning a plurality of bolts 9 one by one. In addition to problems with transportation, the opening and closing operations require a great deal of time and effort, which poses a particularly serious problem in terms of radiation exposure for workers.
本発明者等は、従来かかる問題点を解決するた
め鋭意検討した結果、本発明をなすに至つた。 The present inventors have made intensive studies to solve the conventional problems, and as a result, have come up with the present invention.
即ち、容器本体に固着される底蓋と前記容器本
体に開閉可能な如く取り付けられる上蓋とよりな
る使用済核燃料輸送容器において、上端部に拡大
内径部を形成させると共に該拡大内径部へ連通し
かつ放射方向に延びる複数個のピン貫通孔を有す
る容器本体と、前記拡大内径部へ嵌合しかつ前記
ピン貫通孔に連通する複数個のピン穴を有する上
蓋と、前記ピン貫通孔およびピン穴に挿入される
ピンと、前記上蓋に取り付けられる緩衝材取付け
兼ピン抜止部材よりなる使用済核燃料輸送容器の
上蓋取付構造を提供せんとするものである。 That is, in a spent nuclear fuel transport container consisting of a bottom lid fixed to a container body and a top lid attached to the container body so as to be openable and closable, an enlarged inner diameter portion is formed at the upper end and communicates with the enlarged inner diameter portion. a container body having a plurality of pin through holes extending in a radial direction; a top lid having a plurality of pin holes that fit into the enlarged inner diameter portion and communicate with the pin through holes; It is an object of the present invention to provide a top cover mounting structure for a spent nuclear fuel transport container, which includes a pin to be inserted and a member for attaching a buffer material and also for preventing the pin from coming off, which is attached to the top cover.
以下、第２図〜第５図により本発明の一実施例
を説明する。 An embodiment of the present invention will be described below with reference to FIGS. 2 to 5.
同図において、第１図と同一符号は同一名称を
示す。容器本体Ａの一部をなす上部筒７には拡大
内径部１１が形成されると共に該拡大内径部１１
と外側を連通する如く複数個のピン貫通孔１２が
放射方向に適当間隔を置いて設けられている。そ
して、この拡大内径部１１は第３図にその詳細を
示すように容器本体Ａの内側に向つて順次小径ｄ
を有する如くテーパー状に形成され、その終端部
は急激な先細部ｃとして構成されている。 In this figure, the same reference numerals as in FIG. 1 indicate the same names. An enlarged inner diameter portion 11 is formed in the upper tube 7 that forms a part of the container body A, and the enlarged inner diameter portion 11
A plurality of pin through holes 12 are provided at appropriate intervals in the radial direction so as to communicate with the outside. As shown in detail in FIG.
It is formed into a tapered shape so that it has a shape, and its terminal end is configured as a sharply tapered part c.
上蓋１３は前記拡大内径部１１に嵌合する所謂
落込蓋形式となし、その上面が上部筒７の上端と
ほぼ均一な平面となるよう形成されると共に、そ
の周側面には前記容器本体Ａのピン貫通孔１２に
連通するピン穴１４が複数個設けられている。そ
して、好ましくはこのピン貫通孔１２およびピン
穴１４にはテーパーが付される。１５は上部緩衝
材１０が固着された緩衝材取付部材で、ボルト１
６（第２図）により上蓋８の上面に取り付けられ
るようになつており、かつその周囲には下方に屈
曲する縁１７が円周上全面に設けられている。こ
の縁１７の下辺は第３図に点線で示すようにピン
貫通孔１２の下方に達するよう構成される。１８
はピンであつて、第５図に示す如く好ましくはテ
ーパーピンとされ、内部に突起２０を有する穴２
１が設けられる。２２は図示しない駆動装置に設
けられた爪である。１９，１９′は上蓋１３の下
部でかつ前記拡大内径部１１の先端部ｃに圧接さ
れる位置に設けられたＯリングである。 The upper lid 13 is in the form of a so-called drop-in lid that fits into the enlarged inner diameter portion 11, and is formed so that its upper surface is substantially flat with the upper end of the upper tube 7, and on its circumferential side, the container body A is formed. A plurality of pin holes 14 communicating with the pin through hole 12 are provided. Preferably, the pin through hole 12 and pin hole 14 are tapered. 15 is a cushioning material mounting member to which the upper cushioning material 10 is fixed;
6 (FIG. 2) so that it can be attached to the upper surface of the upper lid 8, and a downwardly bent edge 17 is provided around the entire circumference. The lower side of this edge 17 is configured to reach below the pin through hole 12, as shown by the dotted line in FIG. 18
is a pin, preferably a tapered pin as shown in FIG. 5, with a hole 2 having a projection 20 inside.
1 is provided. 22 is a claw provided on a drive device (not shown). Reference numerals 19 and 19' designate O-rings provided at the lower part of the upper lid 13 at positions that are pressed into contact with the tip c of the enlarged inner diameter section 11.
かかる構造において、上蓋１３を閉塞しようと
する場合、先ず拡大内径部１１内へ上蓋１３を嵌
合させ、ピン穴１４とピン貫通孔１２の位置合せ
を行なう。このとき第４図に示すように、ピン穴
１４の中心がピン貫通孔１２の中心より僅か上部
に位置するように構成しておくことが好ましい。
そしてピン１８を矢印Ｐのように図示しない適当
な手段で押圧挿入すれば、この押圧力がＯリング
１９，１９′の締付力となつて容器の耐圧密封を
保持することが出来る。 In this structure, when attempting to close the upper lid 13, the upper lid 13 is first fitted into the enlarged inner diameter portion 11, and the pin hole 14 and the pin through hole 12 are aligned. At this time, as shown in FIG. 4, it is preferable that the center of the pin hole 14 be located slightly above the center of the pin through hole 12.
If the pin 18 is pressed and inserted by an appropriate means (not shown) as indicated by arrow P, this pressing force becomes a tightening force for the O-rings 19, 19', thereby maintaining the pressure-tight seal of the container.
ピン１８挿入後緩衝材取付部材１５を上蓋１３
上に覆せボルト１６により締付けることにより緩
衝材１０の取り付けと併せてその縁１７がピン１
８の外端に接し、該ピン１８の抜け止めともな
る。この上蓋１３を閉放するときは、前記閉塞と
逆の手順を行なうこととなるが、この場合ピン１
８の抜出しについて附言すれば、第５図において
頭部に設けられた穴２１内に爪２２を挿入し、突
起２０に該爪２２を引掛け、この爪２２をピン１
８と共に移動することにより容易に抜出すことが
出来る。 After inserting the pin 18, attach the cushioning material mounting member 15 to the top lid 13.
By tightening the upper bolt 16, the edge 17 of the buffer material 10 is attached to the pin 1.
8 and also serves as a stopper for the pin 18 to come off. When closing this upper lid 13, the procedure reverse to the above-mentioned closing is performed, but in this case, the pin 1
8, the claw 22 is inserted into the hole 21 provided in the head in FIG.
By moving together with 8, it can be easily extracted.
勿論本発明は、前記実施例に限定されるもので
はない。本発明の重要な点は、使用済核燃料輸送
容器において上蓋を落込蓋形式とし、容器本体と
上蓋を水平放射方向に延びる複数個のピンにより
取り付けると言う技術思想にある。したがつて、
本実施例はかかる思想を逸脱しない範囲で種々変
更できる。 Of course, the present invention is not limited to the above embodiments. The important point of the present invention lies in the technical idea that the top cover of the spent nuclear fuel transport container is of a drop-down type, and the container body and the top cover are attached by a plurality of pins extending in the horizontal radial direction. Therefore,
This embodiment can be modified in various ways without departing from this idea.
例えばピン構造についても上部筒７の外周側面
上にその頭部が突出するように構成することも出
来、この場合の引抜手段は容易なものとなる。 For example, the pin structure can also be configured such that its head protrudes from the outer circumferential side surface of the upper cylinder 7, and in this case, the extraction means becomes easy.
以上説明の如く、本発明によれば開閉する上蓋
を落込蓋形式としたため容器の高さを小さくする
ことが出来、輸送に便利ならしめると共にピン結
合により上蓋の取り付け、取り外しを行なうよう
にしたため、その開閉作業は極めて簡単かつ迅速
に行なうことが出来る。したがつて、作業の効率
向上が計られると共に作業員が被曝する時間も少
なくなり、安全上有利である等の幾多の利点を有
するものである。 As explained above, according to the present invention, the top lid that opens and closes is a drop-in lid type, which makes it possible to reduce the height of the container, making it convenient for transportation, and because the top lid can be attached and removed by pin connection, The opening and closing operations can be performed extremely easily and quickly. Therefore, it has many advantages, such as improving work efficiency, reducing the amount of time workers are exposed to radiation, and improving safety.
第１図は従来の上蓋取付構造を有する使用済核
燃料輸送容器の側断面図、第２図は本発明による
上蓋取付構造を有する使用済核燃料輸送容器の一
実施例の側断面図、第３図は第２図Ｅ部拡大図、
第４図はピン挿入状態説明図、第５図はピン構造
の一実施例の説明図を示すものである。
１……内筒、２……外筒、３……遮蔽材、５…
…内筒底板、６……外筒底板、７……上部外筒、
８……上蓋、９……ボルト、１０，１０′……緩
衝材、１１……拡大内径部、１２……ピン貫通
孔、１３……上蓋、１４……ピン穴、１５……緩
衝材取付部材、１８……ピン。
FIG. 1 is a side sectional view of a spent nuclear fuel transport container having a conventional top cover mounting structure, FIG. 2 is a side sectional view of an embodiment of a spent nuclear fuel transport container having a top cover mounting structure according to the present invention, and FIG. is an enlarged view of part E in Figure 2.
FIG. 4 is an explanatory diagram of the pin insertion state, and FIG. 5 is an explanatory diagram of one embodiment of the pin structure. 1... Inner cylinder, 2... Outer cylinder, 3... Shielding material, 5...
... Inner cylinder bottom plate, 6 ... Outer cylinder bottom plate, 7 ... Upper outer cylinder,
8...Top cover, 9...Bolt, 10, 10'...Buffer material, 11...Enlarged inner diameter section, 12...Pin through hole, 13...Top cover, 14...Pin hole, 15...Buffer material installation Part, 18...pin.
Claims (1)
可能な如く取り付けられる上蓋とよりなる使用済
核燃料輸送容器において、上端部に拡大内径部を
形成させると共に該拡大内径部へ連通しかつ放射
方向に延びる複数個のピン貫通孔を有する容器本
体と前記拡大内径部へ嵌合しかつ前記ピン貫通孔
に連通する複数個のピン穴を有する上蓋と、前記
ピン貫通孔とピン穴に挿入されるピンと、前記上
蓋に取り付けられる緩衝材取付け兼ピン抜止部材
よりなることを特徴とする使用済核燃料輸送容器
の上蓋取付構造。1. In a spent nuclear fuel transport container consisting of a bottom lid fixed to the container body and a top lid attached to the container so as to be openable and closable, an enlarged inner diameter part is formed at the upper end, and a part that communicates with the enlarged inner diameter part and extends in the radial direction. a container body having a plurality of pin through-holes extending therein; a top lid having a plurality of pin holes that fit into the enlarged inner diameter portion and communicate with the pin through-holes; and a top cover that is inserted into the pin through-holes and the pin holes. A top lid mounting structure for a spent nuclear fuel transport container, comprising a pin and a cushioning material mounting and pin removal prevention member that is attached to the top lid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5507880A JPS56151392A (en) | 1980-04-25 | 1980-04-25 | Upper plug fixing structure of cask for spent fvel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5507880A JPS56151392A (en) | 1980-04-25 | 1980-04-25 | Upper plug fixing structure of cask for spent fvel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56151392A JPS56151392A (en) | 1981-11-24 |
| JPS6154200B2 true JPS6154200B2 (en) | 1986-11-21 |
Family
ID=12988663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5507880A Granted JPS56151392A (en) | 1980-04-25 | 1980-04-25 | Upper plug fixing structure of cask for spent fvel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56151392A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH055212U (en) * | 1991-06-28 | 1993-01-26 | 株式会社ケンウツド | Shape of machined surface of extruded material |
| JP6868470B2 (en) * | 2017-05-31 | 2021-05-12 | 日立造船株式会社 | Buffer structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS518614A (en) * | 1974-07-08 | 1976-01-23 | Hahn & Clay | YOKIKOZO |
-
1980
- 1980-04-25 JP JP5507880A patent/JPS56151392A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS518614A (en) * | 1974-07-08 | 1976-01-23 | Hahn & Clay | YOKIKOZO |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56151392A (en) | 1981-11-24 |
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