JPH044236Y2 - - Google Patents
Info
- Publication number
- JPH044236Y2 JPH044236Y2 JP1983126717U JP12671783U JPH044236Y2 JP H044236 Y2 JPH044236 Y2 JP H044236Y2 JP 1983126717 U JP1983126717 U JP 1983126717U JP 12671783 U JP12671783 U JP 12671783U JP H044236 Y2 JPH044236 Y2 JP H044236Y2
- Authority
- JP
- Japan
- Prior art keywords
- cask
- cover
- fastener
- trunnion
- lug
- 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
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
- Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
- Load-Engaging Elements For Cranes (AREA)
Description
【考案の詳細な説明】
本考案は核燃料運搬容器（以下キヤスクとい
う）のカバーに関するものである。[Detailed Description of the Invention] The present invention relates to a cover for a nuclear fuel transport container (hereinafter referred to as a cask).
使用済み等の核燃料はこれを移送する時、放射
線を遮蔽するため、キヤスク内に収納して運搬す
る。そしてキヤスク内への収納は燃料プール等の
水中で放射線を遮蔽しながら行つている。その際
キヤスクは水中の放射性物質で外面が汚染される
のでキヤスクを移送する前に外面を除染しなけれ
ばならない。しかしキヤスク外面にはフイン等が
あり、複雑な表面状態であるため、除染には非常
な手間と時間がかかるので、キヤスクをプールに
入れる前に予めプール外でキヤスク外面を覆うキ
ヤスクカバーをかけ、キヤスクを直接に汚染水を
接触させることをさけているのが現状である。 When used nuclear fuel is transported, it is stored in a cask to shield it from radiation. Storage in the cask is carried out underwater in a fuel pool or other location while shielding it from radiation. At that time, the outside surface of the cask will be contaminated with radioactive materials in the water, so the outside surface must be decontaminated before the cask can be transported. However, the outer surface of the cask has fins, etc. and has a complicated surface condition, so decontamination takes a lot of time and effort. Therefore, before putting the cask into the pool, we put a cask cover on the outer surface of the cask outside the pool. The current situation is to avoid bringing the cask into direct contact with contaminated water.
従来のキヤスクカバー２は第１図に示すように
ゴム引きナイロン織布製のもので、キヤスク１の
側面および底面を覆い（上面は燃料体の出し入れ
をするため覆うことができない）、水密性のフア
スナー３を閉め、上部を鋼製バンド８でシール
し、かつキヤスク１とカバー２の間には清水を充
填した状態でプール水中に浸漬して使用してい
る。 As shown in Fig. 1, the conventional cask cover 2 is made of rubberized nylon fabric and covers the side and bottom surfaces of the cask 1 (the top surface cannot be covered because the fuel is taken in and out), and has a watertight fastener. 3 is closed, the upper part is sealed with a steel band 8, and the space between the cask 1 and the cover 2 is filled with fresh water, and the cask is used by being immersed in pool water.
この従来カバー２のフアスナー３の取付けは、
縦長に１本設け、また、キヤスク１の側面上部の
２ケのトラニオン４，４の位置は、カバー２に孔
をあけ、トラニオン４をカバー２から突出させ、
カバー２とトラニオン４とを水密にシール５して
使用している。 The installation of the fastener 3 of this conventional cover 2 is as follows:
One vertically long trunnion is provided, and the positions of the two trunnions 4, 4 on the upper side of the cask 1 are determined by making a hole in the cover 2 and protruding the trunnion 4 from the cover 2.
The cover 2 and trunnion 4 are sealed watertightly 5 and used.
キヤスク１の寸法は高さ約５ｍ、直径約２ｍ、
重量は約80tもあり、安全上常に転倒防止の処置
をして作業しなければならないとされている。こ
の転倒防止のため、キヤスク１には上記トラニオ
ン４と、トラニオンの少し下部の外周４個所に孔
のあいた転倒防止用ラグ６を備えている。しかし
この転倒防止用ラグ６は使用されておらず、従来
カバー２で覆われていた。 The dimensions of cask 1 are approximately 5m in height, approximately 2m in diameter,
It weighs approximately 80 tons, and for safety reasons, measures must be taken to prevent it from tipping over at all times. In order to prevent this fall, the cask 1 is equipped with the above-mentioned trunnion 4 and fall prevention lugs 6 having holes at four locations on the outer periphery slightly below the trunnion. However, this anti-falling lug 6 was not used and was conventionally covered with a cover 2.
さて、従来型キヤスクカバー２の取付け作業の
手順は、次の順で行われる。 Now, the procedure for installing the conventional cask cover 2 is performed in the following order.
(a) キヤスク１のトラニオン４に吊具（図示しな
い）をかけ、天井クレーンで吊上げる。(a) Hang a hoist (not shown) on the trunnion 4 of the cask 1 and lift it up with an overhead crane.
(b) カバー２をキヤスク１の下部から履かせ、ト
ラニオン４の近くまでフアスナー３を閉めてか
らキヤスク１を床に降ろす。(b) Put the cover 2 on from the bottom of the cask 1, close the fastener 3 close to the trunnion 4, and then lower the cask 1 to the floor.
(c) キヤスク１の上部外周のカバーのかぶらない
所に鋼製リング等からなる仮設転倒防止用ラグ
を使つてワイヤー（図示しない）を数本斜め下
方に引張つて床に止める。(c) Using a temporary fall-prevention lug made of a steel ring or the like, pull several wires (not shown) diagonally downward on the outer circumference of the upper part of the cask 1, where it is not covered by the cover, and fix it to the floor.
(d) トラニオン４にかけてある吊具を外す。(d) Remove the hanger from trunnion 4.
(e) キヤスク１の上部までカバーをし、フアスナ
３を閉め、カバー２の上端を鋼製バンド８でシ
ールし、トラニオン４の部分の孔にシール５を
する。(e) Cover the cask 1 to the top, close the fastener 3, seal the upper end of the cover 2 with a steel band 8, and seal 5 in the hole at the trunnion 4.
(f) トラニオン４に吊具をかける。(f) Hang the hanging device on trunnion 4.
(g) 上記仮設転倒防止用ラグワイヤー等を取外
す。(g) Remove the temporary fall prevention lug wire, etc. mentioned above.
(h) しかる後、キヤスク１を吊り上げてプール内
に入れる。(h) After that, lift Cask 1 and place it in the pool.
次にこのようにとりつけられているキヤスクカ
バーを取外すには、上記と逆の手順で行う。 Next, to remove the cask cover installed in this way, follow the steps in reverse.
この考案は、従来型キヤスクカバーの取付け、
取外しの際の鋼製リング等からなる仮設転倒防止
用ラグの取付け・取外しを廃止することにより作
業工程全体を短縮することを可能とするキヤスク
カバーを提供することを目的とするものである。 This idea is based on the installation of a conventional cask cover,
The object of the present invention is to provide a cask cover that makes it possible to shorten the entire work process by eliminating the need to attach and remove a temporary anti-falling lug made of a steel ring or the like during removal.
さらに又、従来キヤスクにとりつけられていた
転倒防止用ラグを実際に使用しうるキヤスクカバ
ーを提供することを目的とするものである。 A further object of the present invention is to provide a cask cover that can actually use the anti-falling lugs conventionally attached to casks.
以下第２図と第３図を参照して実施例につき説
明する。本考案は、従来型のキヤスクカバーに比
しキヤスクの転倒防止用ラグ６に対応する位置の
キヤスクカバー２にフアスナー７を設けて転倒防
止用ラグ６使用できるようにしたものである。 An embodiment will be described below with reference to FIGS. 2 and 3. In the present invention, compared to conventional cask covers, a fastener 7 is provided on the cask cover 2 at a position corresponding to the lug 6 for preventing the cask from falling over, so that the lug 6 for preventing the fall of the cask can be used.
フアスナー７の設け方には (a) 縦型にフアスナーを取付ける方法（第３図）。 How to install fastener 7 (a) How to install a vertical fastener (Figure 3).
(b) 横型にフアスナーを取付ける方法。(b) How to install a fastener horizontally.
(c) 円弧型にフアスナーを取付ける方法。(c) How to attach fasteners in an arc shape.
(d) カバー２の該当部を袋状に突出させ、その側
面の一部にフアスナーを取付ける方法（第２
図）
等があるが、特定のものに限定しない。(d) A method of protruding the corresponding part of the cover 2 like a bag and attaching a fastener to a part of the side surface (second method)
(Fig.) etc., but it is not limited to a specific one.
さて、本考案のカバー２の取付け作業を説明す
ると、
(a) キヤスク１のトラニオン４に吊具をかけ天井
クレーンで吊上げる。 Now, to explain the installation work of the cover 2 of the present invention, (a) Hang a hanging device on the trunnion 4 of the cask 1 and lift it with an overhead crane.
(b) カバー２をキヤスクの下部からトラニオンの
近くまで覆い、フアスナー３をそこまで閉め
る。この際前記ラグ６用のフアスナー７は開い
ておく。(b) Cover the cover 2 from the bottom of the cask to the vicinity of the trunnion, and close the fastener 3 to that point. At this time, the fastener 7 for the lug 6 is left open.
(c) キヤスク１を床に吊降した後４個の転倒防止
用ラグ６にそれぞれワイヤーを取付け、斜め下
方に引張つて床に止める。(c) After suspending the cask 1 on the floor, wires are attached to each of the four fall prevention lugs 6, and the cask is pulled diagonally downward and fixed on the floor.
(d) トラニオン４にかけてある吊具を外す。(d) Remove the hanger from trunnion 4.
(e) キヤスク１の上部までカバー２で覆い、フア
スナー３を完全に閉める。(e) Cover the top of the cask 1 with the cover 2 and close the fastener 3 completely.
(f) カバー２の上端を鋼製バンド８でシールす
る。(f) Seal the upper end of the cover 2 with a steel band 8.
(g) カバー２のトラニオン４の部分をシール５す
る。(g) Seal 5 the trunnion 4 portion of the cover 2.
(h) トラニオン４に吊具をかける。(h) Hang the hanging device on trunnion 4.
(i) 上記転倒防止用ラグ６のワイヤー等を取外
す。(i) Remove the wires, etc. of the above-mentioned fall prevention lug 6.
(j) 前記ラグ６用フアスナー７を閉める。(j) Close the fastener 7 for the lug 6.
(k) しかる後、キヤスク１を吊り上げてプール内
に入れる。(k) After that, lift Cask 1 and place it in the pool.
なおカバー２の取外し作業の手順は、取付け作
業の場合と逆になる。 Note that the procedure for removing the cover 2 is the reverse of the procedure for attaching it.
本考案は以上の如く構成されている。これによ
れば、キヤスク本体に既にとりつけられている転
倒防止用ラグを、キヤスクカバーから突出させ、
これにワイヤー等をかけて支持できるようにし
た。したがつて従来の如くキヤスク上部の鋼製リ
ング等からなる仮設転倒防止用ラグを取付けた
り、取外したり等の面倒な作業を省くことがで
き、キヤスク取扱い上の作業性の向上に顕著な効
果を奏するものである。 The present invention is constructed as described above. According to this, the fall prevention lug, which is already attached to the cask body, is made to protrude from the cask cover,
I attached wires, etc. to this so that it could be supported. Therefore, it is possible to eliminate the troublesome work of attaching and removing the temporary anti-falling lugs made of steel rings on the top of the cask as in the past, and this has a significant effect on improving the workability of handling the cask. It is something to play.
第１図は従来型キヤスクカバーの正面図、第２
図は本考案に係るキヤスクカバー（正面図）、第
３図は同じく本考案に係るキヤスクカバーの別の
実施例。
図において；１……キヤスク、２……キヤスク
カバー、３……フアスナー、４……トラニオン、
５……シール、６……転倒防止用ラグ、７……フ
アスナー、８……鋼製バンド。
Figure 1 is a front view of a conventional cask cover, Figure 2 is a front view of a conventional cask cover.
The figure shows a cask cover (front view) according to the present invention, and FIG. 3 shows another embodiment of the cask cover according to the present invention. In the figure: 1... cask, 2... cask cover, 3... fastener, 4... trunnion,
5... Seal, 6... Fall prevention lug, 7... Fastener, 8... Steel band.
Claims (1)
対応してフアスナ７で開閉可能な孔を設け、該孔
から前記ラグ６を突出可能にしたことを特徴とす
る核燃料運搬容器用カバー。 A cover for a nuclear fuel transport container, characterized in that a hole that can be opened and closed with a fastener 7 is provided in correspondence with a fall prevention lug 6 attached to a cask, and the lug 6 can be protruded from the hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983126717U JPS6033695U (en) | 1983-08-16 | 1983-08-16 | Cover for nuclear fuel transport container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983126717U JPS6033695U (en) | 1983-08-16 | 1983-08-16 | Cover for nuclear fuel transport container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6033695U JPS6033695U (en) | 1985-03-07 |
| JPH044236Y2 true JPH044236Y2 (en) | 1992-02-07 |
Family
ID=30288035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983126717U Granted JPS6033695U (en) | 1983-08-16 | 1983-08-16 | Cover for nuclear fuel transport container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6033695U (en) |
-
1983
- 1983-08-16 JP JP1983126717U patent/JPS6033695U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6033695U (en) | 1985-03-07 |
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