JP4812556B2 - Radioactive waste transport container mechanism - Google Patents

Radioactive waste transport container mechanism Download PDF

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JP4812556B2
JP4812556B2 JP2006219020A JP2006219020A JP4812556B2 JP 4812556 B2 JP4812556 B2 JP 4812556B2 JP 2006219020 A JP2006219020 A JP 2006219020A JP 2006219020 A JP2006219020 A JP 2006219020A JP 4812556 B2 JP4812556 B2 JP 4812556B2
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container
transport container
area
lid
partition plate
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JP2008045886A (en
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潔 時枝
五月 武仲
誠司 福田
勝 磯崎
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Kawasaki Motors Ltd
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Kawasaki Jukogyo KK
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Description

本発明は、原子力発電所の解体などで発生する大型の放射性廃棄物を汚染管理区域から搬出するときに使用する放射性廃棄物搬送容器のシール機構に関する。   The present invention relates to a sealing mechanism for a radioactive waste transport container used when carrying out large radioactive waste generated by dismantling of a nuclear power plant from a pollution control area.

原子力発電所などの原子力施設では、放射線被曝を的確に制御するため、また、放射性物質による汚染の拡大を防止するため、汚染のおそれのない区域（Ａ区域）と汚染管理区域とに分けて管理されており、さらに、汚染管理区域は汚染の拡がりを防止する区域（Ｂ区域）と汚染の管理を必要とする区域（Ｃ区域、Ｄ区域）とに分けて管理されている。   In nuclear facilities such as nuclear power plants, in order to accurately control radiation exposure and to prevent the spread of contamination by radioactive materials, management is divided into areas where there is no risk of contamination (A area) and pollution control areas. Furthermore, the pollution control area is divided into an area that prevents the spread of contamination (B area) and an area that requires contamination management (C area and D area).

Ｃ区域、Ｄ区域などの汚染の管理を必要とする区域で発生した解体片などの放射性廃棄物を汚染のないＡ区域まで搬出するときは、容器に収納して行うことが一般的である。従来は、容器をＣ区域またはＤ区域に持ち込んで廃棄物を収納した後、容器全面について汚染拭き取り検査を行い、表面汚染密度が基準値以下であることを確認した上でＢ区域に搬出し、Ｂ区域でさらに容器全面の汚染拭き取り検査を行い、表面汚染密度が基準値以下であることを確認した上でＡ区域に搬出していた。
この汚染拭き取り検査は手間と時間の必要な作業であるため、搬出作業を合理化する上で検査面積を小さくすることが求められてきた。 When carrying out radioactive wastes such as dismantling pieces generated in areas requiring control of contamination such as C area and D area, it is common to carry them in a container. Conventionally, after bringing the container into the C area or D area and storing the waste, the entire surface of the container is subjected to a contamination wiping inspection, and after confirming that the surface contamination density is below the reference value, it is carried out to the B area. In the B area, further contamination wiping inspection was performed on the entire surface of the container, and after confirming that the surface contamination density was below the reference value, it was carried out to the A area.
Since this contamination wiping inspection is an operation that requires labor and time, it has been required to reduce the inspection area in order to streamline the unloading operation.

特許文献１には、比較的軽量の放射性廃棄物を処理室内から搬出する機構が記載されている。図１３は、記載された機構における収納容器の蓋の扱いを説明した工程図である。記載の機構は容器を汚染処理室に持ち込まずに放射性廃棄物を収納するようにしたもので、まずＯリングにより缶蓋を気密に取り付けた缶を、処理室の投棄口の外側に形成された装着部にロック機構により気密に装着する。このとき、缶蓋は投棄口のロック機構により投棄口の蓋に気密に連結される。次いで、処理室内側から蓋を引き上げると、缶蓋はＯリングから解放され蓋と一体に持ち上がるので、放射性廃棄物を缶内に投入する。その後、一体となった缶蓋と蓋を降ろし、缶蓋をＯリングにより缶に装着し、蓋を廃棄口に装着する。次いで、ロック機構を解除し缶蓋の付いた缶を装着部から外して、搬出する。これにより、放射性廃棄物は缶内に密閉収容され外部に搬出される。   Patent Document 1 describes a mechanism for carrying out a relatively lightweight radioactive waste from a processing chamber. FIG. 13 is a process diagram illustrating the handling of the lid of the storage container in the described mechanism. The described mechanism is designed to store radioactive waste without bringing the container into the contamination processing chamber. First, a can with an airtight lid attached by an O-ring was formed outside the disposal port of the processing chamber. It is airtightly attached to the attachment part by a lock mechanism. At this time, the can lid is airtightly connected to the lid of the dumping port by the lock mechanism of the dumping port. Next, when the lid is pulled up from the inside of the processing chamber, the can lid is released from the O-ring and lifted together with the lid, so that radioactive waste is put into the can. Thereafter, the integrated can lid and lid are lowered, the can lid is attached to the can by an O-ring, and the lid is attached to the waste outlet. Next, the lock mechanism is released, and the can with the can lid is removed from the mounting portion and carried out. Thereby, the radioactive waste is hermetically accommodated in the can and carried out to the outside.

記載された機構では、缶の表面は汚染されないので、汚染拭き取り検査が簡便になり、搬出作業の合理化が可能である。
しかし、汚染の拡大防止はＯリングの健全性に依存するため、原子力発電所の解体片など、重量のある放射性廃棄物を取り扱う場合には、確実に汚染を防止することが難しい場合がある。また、缶の構造やロック機構なども、重量物を扱うときには破損のおそれがある。
特開平６−１３８２９９６号公報 In the described mechanism, the surface of the can is not contaminated, so that the contamination wiping inspection is simplified and the carrying out operation can be rationalized.
However, since prevention of the spread of contamination depends on the soundness of the O-ring, it may be difficult to reliably prevent contamination when handling heavy radioactive waste such as a nuclear power plant dismantling piece. In addition, the structure of the can and the locking mechanism may be damaged when handling heavy objects.
JP-A-6-138996

そこで、本発明が解決しようとする課題は、大型かつ大重量の放射性廃棄物を収納容器を用いて汚染の管理を必要とする区域から搬出するときに、収納容器の外表面を汚染させず、汚染拭き取り検査の対象を限定することにより、拭き取り作業や汚染検査作業にかかる時間を短縮し、搬出作業を合理化することである。   Therefore, the problem to be solved by the present invention is that when carrying out a large and heavy radioactive waste from an area requiring the management of contamination using a storage container, the outer surface of the storage container is not contaminated, By limiting the target of the contamination wiping inspection, the time required for the wiping operation and the contamination inspection operation is shortened, and the carry-out operation is streamlined.

上記課題を解決するため、本発明の放射性廃棄物搬送容器機構は、汚染の管理を必要とする区域の床面に仕切り板で開口を開閉可能に塞いだ廃棄物投入孔を設け、容器蓋を着脱可能に取り付けた搬送容器と、合体した仕切り板と容器蓋を吊り下げて昇降させる吊下装置と、廃棄物投入孔の下に位置して搬送容器を鉛直方向に移動可能に載置する昇降台を備え、仕切り板には長ボルトが貫通するボルト孔が設けられ容器蓋の上面に設けた容器蓋を貫通しないねじ孔にボルト孔を貫通した長ボルトの先端を螺入することにより仕切り板の下面と容器蓋の外表面を合わせて気密に固定する機構を備えることを特徴とする。
In order to solve the above-mentioned problems, the radioactive waste transport container mechanism of the present invention is provided with a waste input hole in which an opening is opened and closed with a partition plate on the floor surface of an area requiring contamination control, and a container lid is provided. A transport container that is detachably attached, a suspension device that suspends and lifts the combined partition plate and the container lid, and a lift that is placed under the waste input hole so that the transport container can be moved vertically. The partition plate is provided with a bolt hole through which the long bolt passes, and the tip of the long bolt that penetrates the bolt hole is screwed into a screw hole that does not penetrate the container lid provided on the upper surface of the container lid. And a mechanism for hermetically fixing the lower surface of the container and the outer surface of the container lid together.

搬送容器を昇降台に載置して上昇させ廃棄物投入孔に対して気密に当接させて、仕切り板と容器蓋を気密に結合して汚染の管理を必要とする区域側に吊り上げて廃棄物投入孔を開口させ、放射性廃棄物を搬送容器に収納した後に仕切り板と容器蓋を吊り下げて搬送容器を封止し、仕切り板と容器蓋を分離して仕切り板で廃棄物投入孔を塞いだ後に、搬送容器を廃棄物投入孔から外して搬出する。   Place the transport container on the lifting platform, lift it up, bring it into airtight contact with the waste input hole, and connect the partition plate and container lid in an airtight manner and lift it up to the area where contamination control is required. After opening the material input hole and storing radioactive waste in the transport container, the partition plate and the container lid are suspended to seal the transport container, the partition plate and the container cover are separated, and the waste input hole is formed with the partition plate. After closing, the transport container is removed from the waste input hole and carried out.

本発明の放射性廃棄物搬送容器機構によれば、廃棄物投入孔は放射性廃棄物を搬出するとき以外は仕切り板で塞がれており、搬出時には搬送容器で気密に塞がれているので、汚染の管理を必要とする区域の外に汚染が広がる心配がない。また、搬送容器は汚染の管理を必要とする区域に持ち込まないためその表面が汚染される心配がない。さらに、合体した仕切り板と容器蓋を吊下装置により吊り下げて汚染の管理を必要とする区域に持ち込むときにも、容器蓋の外表面と仕切り板の下表面は汚染の管理を必要とする区域の外で気密に合わせられたものなので、容器蓋の外表面と仕切り板の下表面が汚染されることはない。
このため、搬送容器の外表面の拭き取り作業や汚染検査作業を簡約化して搬出作業を合理化することができる。 According to the radioactive waste transport container mechanism of the present invention, the waste input hole is closed with a partition plate except when carrying out the radioactive waste, and when transported, it is airtightly closed with the transport container. There is no concern that the contamination will spread outside the area that needs to be managed. In addition, since the transport container is not brought into an area that needs to be controlled for contamination, there is no fear that the surface thereof is contaminated. Furthermore, when the combined partition plate and container lid are suspended by a suspension device and brought into an area that requires contamination control, the outer surface of the container lid and the lower surface of the partition plate require contamination control. Since it is airtightly fitted outside the area, the outer surface of the container lid and the lower surface of the partition plate are not contaminated.
For this reason, it is possible to simplify the wiping work and the contamination inspection work on the outer surface of the transport container and rationalize the carrying out work.

なお、昇降台に載置した搬送容器を廃棄物投入孔に押し付けて気密を維持するため、昇降台に精密な高さ調節ができるボールねじ式リフト機構を備えることができる。また、搬送容器の縁と廃棄物投入孔の縁が当接するところにゴムパッキンを備えて確実にシールするようにすることが好ましい。さらに、昇降台にはレーザ式距離計などの非接触式変位計と、その測定値に基づいて昇降装置を調整する機構を備えることが好ましい。搬送容器に収納される重量物の多寡によって容器が浮き沈みすると汚染の管理を必要とする区域との気密が破れるおそれがあるので、微少な変位を検出してこれを相殺するように昇降台の位置を調整することが好ましいからである。
また、昇降台は台車に取り付けられて水平方向に移動ができるようにすると、搬送容器の搬出搬入に便利である。 In addition, in order to maintain the airtightness by pressing the transport container placed on the lifting platform against the waste input hole, the lifting platform can be provided with a ball screw type lift mechanism capable of precise height adjustment. Moreover, it is preferable to provide a rubber packing at the place where the edge of the transport container and the edge of the waste input hole come into contact with each other to ensure sealing. Furthermore, it is preferable that the lifting platform includes a non-contact displacement meter such as a laser distance meter and a mechanism for adjusting the lifting device based on the measured value. If the container floats or sinks due to the large amount of heavy objects stored in the transport container, the airtightness with the area that needs to be controlled for contamination may be broken. It is because it is preferable to adjust.
Further, if the lifting platform is attached to the carriage and can be moved in the horizontal direction, it is convenient for loading and unloading of the transport container.

仕切り板の下面と容器蓋の外表面を合わせて気密に固定する機構は、ボルトナットにより構成されるものであってよい。特に、仕切り板にボルト孔を設けボルトを上面から差し込んで、容器蓋の外表面側に設けたナットでこのボルトを受けて、仕切り板と容器蓋を固定するようにすることが好ましい。ボルト孔には常時ボルトをセットしておくことにより、仕切り板で廃棄物投入孔を塞ぐときに汚染の管理を必要とする区域を気密に保持して、汚染の拡大を防ぐ。また、ナットの孔は容器蓋を貫通しないようにして、蓋を閉めたときに搬送容器が気密を維持できるようにする。   The mechanism for fixing the lower surface of the partition plate and the outer surface of the container lid together in an airtight manner may be constituted by a bolt and nut. In particular, it is preferable that a bolt hole is provided in the partition plate, the bolt is inserted from above, and the bolt is received by a nut provided on the outer surface side of the container lid to fix the partition plate and the container lid. Bolts are always set in the bolt holes, so that the area that needs to be controlled when the waste input hole is blocked with a partition plate is kept airtight to prevent the spread of contamination. The nut hole does not penetrate the container lid so that the transport container can be kept airtight when the lid is closed.

以下、実施例を用いて本発明を詳細に説明する。
図１から図８は、本発明の１実施例に係る放射性廃棄物搬送容器機構における工程を表す図面、図９から図１１は本実施例の蓋部分の構造を説明する図面、図１２は別の実施例における蓋構造を説明する断面図、図１３は従来技術における放射性廃棄物搬送容器の使用方法を説明する図面である。 Hereinafter, the present invention will be described in detail using examples.
1 to 8 are drawings showing steps in the radioactive waste transport container mechanism according to one embodiment of the present invention, FIGS. 9 to 11 are drawings for explaining the structure of the lid portion of this embodiment, and FIG. Sectional drawing explaining the cover structure in the Example of this, FIG. 13 is drawing explaining the usage method of the radioactive waste conveyance container in a prior art.

本実施例の放射性廃棄物搬送容器機構は、汚染の管理を必要とする区域（Ｃ区域）において解体した放射性廃棄物を搬送容器に収納し、汚染の拡がりを防止する区域（Ｂ区域）を介して、非汚染区域（Ａ区域）に搬出するもので、搬送容器をＣ区域とＢ区域の境界に気密にセットして放射性廃棄物を投入し、汚染がＢ区域側に拡大しないように封止して搬出することを特徴とする。   The radioactive waste transport container mechanism of the present embodiment stores the radioactive waste dismantled in an area (C area) where pollution control is required in the transport container, and passes through an area (B area) that prevents the spread of contamination. In order to transport the product to the non-contaminated area (A area), set the transport container airtight at the boundary between the C area and the B area and inject radioactive waste. And then carrying out.

図１は、搬送容器をＣ区域の床下に取り込む前の状態を表す図面である。
Ｃ区域１の床下にＢ区域２を設定し、仕切りとなる仕切り床１１に開口を設けて廃棄物投入孔１２とする。常時は廃棄物投入孔１２に仕切り板１３を気密に取り付けることにより、Ｃ区域を他の区域から隔離している。また、Ｂ区域２の側壁には仕切り扉２１を設けてＡ区域３と仕切っている。
放射性廃棄物を収納する搬送容器５は、容器を気密に封止する容器蓋５１を備える。 FIG. 1 is a diagram illustrating a state before a transport container is taken under the floor of the C area.
The B area 2 is set under the floor of the C area 1, and an opening is provided in the partition floor 11 serving as a partition to form a waste input hole 12. Normally, the partition area 13 is airtightly attached to the waste input hole 12 to isolate the area C from other areas. A partition door 21 is provided on the side wall of the B area 2 to partition the A area 3.
The transport container 5 that stores the radioactive waste includes a container lid 51 that hermetically seals the container.

搬送容器５は搬送台車４に搭載されて、仕切り扉２１からＢ区域２に持ち込まれ、廃棄物投入孔１２の下に配置される。搬送台車４がＢ区域２に入ったらできるだけ速やかに仕切り扉２１を閉めて汚染拡大を防止する。
搬送台車４は搬送容器５を搭載して昇降させる昇降台４１を備える。昇降台４１を昇降させる機構は、図２以降に表わされるような交差するビームの交差角により高さを調節する大ストローク用のリンク式昇降機４４に加えて、微調整ができるボールねじ式リフト機構４２を併用する。
さらに、レーザ式変位計などの非接触式変位計４３を備えて、昇降台４１の高さを常に測定して、目標値からずれたときにはボールねじ式リフト機構４２を駆動して搬送容器５の高さを調整するようになっている。 The transport container 5 is mounted on the transport carriage 4, brought into the B area 2 from the partition door 21, and disposed under the waste input hole 12. When the transport carriage 4 enters the B zone 2, the partition door 21 is closed as soon as possible to prevent the spread of contamination.
The transport carriage 4 includes a lifting platform 41 that carries the transport container 5 and moves it up and down. A mechanism for raising and lowering the elevator 41 is a ball screw type lift mechanism that can be finely adjusted in addition to the link type elevator 44 for a large stroke that adjusts the height by the crossing angle of intersecting beams as shown in FIG. 42 is used together.
Further, a non-contact displacement meter 43 such as a laser displacement meter is provided, and the height of the lifting platform 41 is constantly measured. When the height is deviated from the target value, the ball screw lift mechanism 42 is driven to The height is adjusted.

図９は、搬送容器５と廃棄物投入孔１２の係合部分の構成例を拡大して示した断面図である。図９に示した例では、搬送容器５の容器本体５２の上縁にはフランジ５３が設けられ、フランジ上面にはゴムパッキン５４が当てられている。また、フランジ５３の内側にゴムパッキンを貼付した鍔５５が設けられて、この鍔５５に容器蓋５１を載せてボルト５６で固定したときに容器内部を気密に維持するようになっている。   FIG. 9 is an enlarged cross-sectional view showing a configuration example of an engaging portion between the transport container 5 and the waste input hole 12. In the example shown in FIG. 9, a flange 53 is provided on the upper edge of the container body 52 of the transport container 5, and a rubber packing 54 is applied to the upper surface of the flange. Further, a flange 55 with rubber packing affixed to the inside of the flange 53 is provided. When the container lid 51 is placed on the flange 55 and fixed with a bolt 56, the inside of the container is kept airtight.

また、Ｃ区域の仕切り床１１に設けられた廃棄物投入孔１２には、鍔を有する仕切り板１３が嵌合して、鍔のところでボルト１４により固定されていて、Ｃ区域とＢ区域の間の気通を遮断している。なお、仕切り板１３には貫通するボルト孔１５が設けられ、長ボルト１６が挿入されている。なお、長ボルト１６を挿入したときにボルト孔１５が気密に封止してＣ区域を遮蔽することが好ましい。
容器蓋５１の上面にはねじ孔５７が設けられていて、長ボルト１６の先端が螺入されるようになっている。なお、ねじ孔５７は容器蓋５１を貫通しないように形成され、搬送容器５に蓋をしたときに容器を密封できるようになっている。 Further, a partition plate 13 having a hook is fitted into the waste input hole 12 provided in the partition floor 11 of the C area, and is fixed by a bolt 14 at the hook, and between the C area and the B area. Is shutting off the air. The partition plate 13 is provided with a through-hole 15 and a long bolt 16 is inserted therein. In addition, when the long bolt 16 is inserted, it is preferable that the bolt hole 15 is airtightly sealed to shield the area C.
A screw hole 57 is provided on the upper surface of the container lid 51 so that the tip of the long bolt 16 is screwed. The screw hole 57 is formed so as not to penetrate the container lid 51 so that the container can be sealed when the transport container 5 is covered.

図２は、搬送容器５をＣ区域１の廃棄物投入孔１２の下に配設した状態を表す図面である。
搬送容器５を搭載した搬送台車４をＢ区域２に搬入して、Ｂ区域内で搬送容器５の容器蓋５１を固定していたボルト５６を外す。次に、搬送容器５を廃棄物投入孔１２の下に移動し、リンク式昇降機４４により昇降台４１を持ち上げて搬送容器５のフランジ５３が、廃棄物投入孔１２の縁に設けられた容器位置決めガイド１７に案内されて、廃棄物投入孔１２の縁に当たり、ゴムパッキン５４によりシールして、Ｃ区域１の空気がＢ区域２に漏れないようにする。
なお、ガイドは搬送容器５の方に設けて、廃棄物投入孔１２の内壁とガイドの外側が係合するようにしてもよい。 FIG. 2 is a diagram illustrating a state in which the transport container 5 is disposed below the waste charging hole 12 in the C area 1.
The transport carriage 4 carrying the transport container 5 is carried into the B area 2, and the bolt 56 that has fixed the container lid 51 of the transport container 5 in the B area is removed. Next, the transport container 5 is moved below the waste charging hole 12, the lifting platform 41 is lifted by the link type elevator 44, and the flange 53 of the transport container 5 is positioned at the edge of the waste charging hole 12. Guided by the guide 17, it hits the edge of the waste charging hole 12 and is sealed by the rubber packing 54 so that the air in the C zone 1 does not leak into the B zone 2.
The guide may be provided toward the transport container 5 so that the inner wall of the waste input hole 12 and the outer side of the guide are engaged.

さらに、Ｃ区域側から仕切り板１３の長ボルト１６を容器蓋５１のねじ孔５７に螺入して仕切り板１３と容器蓋５１を一体化し、また、仕切り板１３を仕切り床１１に止めていたボルト１４を外す。
図１０は、このときの搬送容器５と廃棄物投入孔１２の係合部分を拡大して示した断面図である。
長ボルト１６の先端が容器蓋５１の厚みの途中まで達して、仕切り板１３と容器蓋５１を接合している。容器蓋５１と搬送容器本体５２を結合するボルトは取り外され、また仕切り板１３をＣ区域の仕切り床１１に固定するボルトも取り外されている。 Further, the long bolt 16 of the partition plate 13 is screwed into the screw hole 57 of the container lid 51 from the C area side to integrate the partition plate 13 and the container lid 51, and the partition plate 13 is fixed to the partition floor 11. Remove the bolt 14.
FIG. 10 is an enlarged cross-sectional view of the engaging portion between the transport container 5 and the waste input hole 12 at this time.
The tip of the long bolt 16 reaches the middle of the thickness of the container lid 51, and the partition plate 13 and the container lid 51 are joined. The bolts that connect the container lid 51 and the transport container main body 52 are removed, and the bolts that fix the partition plate 13 to the partition floor 11 in the C section are also removed.

図３および図１１は、一体化した仕切り板１３と容器蓋５１を吊り上げた状態を示す図面である。
一体化した仕切り板１３と容器蓋５１はクレーンなどで吊り上げられて廃棄物投入孔１２から持ち上がり、Ｃ区域１の適当な位置に運ばれ、そこに仮置きされる。搬送容器５の内部は廃棄物投入孔１２を通してＣ区域１に解放される。
合体させた仕切り板１３と容器蓋５１はＣ区域１の雰囲気に暴露されるので、その表面が放射性物質に汚染される可能性があるが、仕切り板１３と容器蓋５１の接合面は密閉されているので汚染されない。 3 and 11 are views showing a state in which the integrated partition plate 13 and the container lid 51 are lifted.
The integrated partition plate 13 and the container lid 51 are lifted by a crane or the like, lifted from the waste charging hole 12, transported to an appropriate position in the C area 1, and temporarily placed there. The inside of the transport container 5 is released to the C area 1 through the waste charging hole 12.
Since the combined partition plate 13 and the container lid 51 are exposed to the atmosphere of the C zone 1, the surface may be contaminated with radioactive substances, but the joint surface between the partition plate 13 and the container lid 51 is sealed. So it is not polluted.

図４は、放射性廃棄物を搬送容器５に収納する状態を示す図面である。
放射性廃棄物６は、クレーンなどで搬送容器５内に吊り下ろされる。
原子力装置の解体などで発生する大型の廃棄物は重量が数トンに及ぶものもあり、これに対応するためには、搬送容器５も数ｍ3程度の容積を持った大型のものを使用する必要がある。 FIG. 4 is a view showing a state in which radioactive waste is stored in the transport container 5.
The radioactive waste 6 is suspended in the transport container 5 by a crane or the like.
Some large-scale waste generated by the dismantling of nuclear equipment weighs several tons, and in order to cope with this, the transport container 5 also uses a large one having a volume of about several m 3. There is a need.

このような大型の放射性廃棄物６を搬送容器５に収納すると、搬送容器５は重みにより沈み込んで、廃棄物投入孔１２の縁とゴムパッキン５４の間のシールが緩み、Ｃ区域１の空気がＢ区域２に漏れるおそれがある。
これに対して、本実施例の昇降台４１には、レーザ式変位計などの非接触式変位計４３と台の高さを微調整できるボールねじ式リフト機構４２が設けられていて、昇降台４１の高さを常に測定しており、測定値が目標値からずれてシールが解けそうになったときにはボールねじ式リフト機構４２を駆動して搬送容器５の高さを調整することによりシールを確保するようになっている。 When such a large radioactive waste 6 is stored in the transport container 5, the transport container 5 sinks due to the weight, the seal between the edge of the waste input hole 12 and the rubber packing 54 is loosened, and the air in the C zone 1 May leak into B area 2.
In contrast, the lifting platform 41 of this embodiment is provided with a non-contact displacement meter 43 such as a laser displacement meter and a ball screw type lift mechanism 42 that can finely adjust the height of the platform. 41 is constantly measured, and when the measured value deviates from the target value and the seal is about to be released, the ball screw type lift mechanism 42 is driven to adjust the height of the transfer container 5 to remove the seal. It comes to secure.

図５は、放射性廃棄物６を搬送容器５に収納した後に一体化した仕切り板１３と容器蓋５１を再び廃棄物投入孔１２に吊り下ろした状態を示す図面である。
クレーンなどを使って、仕切り板１３と容器蓋５１の一体化物を仮置きした場所で吊り上げ、廃棄物投入孔１２の上まで移動してきて、孔に吊り下ろす。
次いで、Ｃ区域１内の仕切り板１３の上面側から、長ボルト１６を緩めて容器蓋５１を分離して搬送容器５に預ける。また、仕切り板１３の鍔をボルト１４で仕切り床１１に固定する。
廃棄物投入孔１２は密封され、Ｃ区域１とＢ区域２は気密に遮断されて汚染の拡大が防止される。これにより搬送容器５のフランジ５３と廃棄物投入孔１２の縁の間の気密は不要になるので、昇降台４１の高さ調整を停止する。 FIG. 5 is a view showing a state in which the partition plate 13 and the container lid 51 integrated after the radioactive waste 6 is stored in the transport container 5 are suspended from the waste charging hole 12 again.
A crane or the like is used to lift the integrated product of the partition plate 13 and the container lid 51 at a place where it is temporarily placed, and it moves over the waste charging hole 12 and hangs in the hole.
Next, the long bolt 16 is loosened from the upper surface side of the partition plate 13 in the C area 1 to separate the container lid 51 and deposit it in the transport container 5. Further, the cage of the partition plate 13 is fixed to the partition floor 11 with bolts 14.
The waste input hole 12 is sealed, and the C zone 1 and the B zone 2 are hermetically cut off to prevent the spread of contamination. This eliminates the need for airtightness between the flange 53 of the transport container 5 and the edge of the waste charging hole 12, so that the height adjustment of the lifting platform 41 is stopped.

図６は、搬送容器５を廃棄物投入孔１２から切り離した状態を表す図面である。
リンク式昇降機４４により昇降台４１を下降させて、搬送容器５をＣ区域１の仕切り床１１の下面から切り離す。
容器蓋５１は搬送容器５の開口に付いたまま降下する。 FIG. 6 is a diagram illustrating a state in which the transport container 5 is separated from the waste charging hole 12.
The elevator 41 is lowered by the link type elevator 44 to separate the transfer container 5 from the lower surface of the partition floor 11 in the C section 1.
The container lid 51 is lowered while attached to the opening of the transport container 5.

図７は、搬送容器５を拭き取り検査する状態を表す図面である。
搬送容器５をＣ区域１の床下から切り離した後に、Ｂ区域２内で搬送容器５の表面を拭き取り検査して、汚染のないＡ区域３に引き出せないほどの汚染がないことを確認する。搬送容器５の表面は、原則としてＣ区域に露呈されていないので、Ｃ区域の雰囲気に接触した可能性があるフランジ５３の合わせ部分や容器蓋５１の周辺部などを重点的に検査すればよい。
検査に合格したら、ボルト５６で容器蓋５１を搬送容器５にしっかりと固定する。 FIG. 7 is a diagram illustrating a state in which the transport container 5 is wiped and inspected.
After the transfer container 5 is cut off from under the floor of the C area 1, the surface of the transfer container 5 is wiped and inspected in the B area 2, and it is confirmed that there is no contamination that cannot be pulled out to the A area 3 without contamination. Since the surface of the transport container 5 is not exposed to the C area as a general rule, it is only necessary to focus on the mating part of the flange 53 or the peripheral part of the container lid 51 that may have come into contact with the atmosphere of the C area. .
When the inspection is passed, the container lid 51 is firmly fixed to the transport container 5 with the bolt 56.

図８は、搬送容器５をＡ区域３に搬出した状態を表す図面である。
拭き取り検査により安全を確認し容器蓋５１を固定して汚染の拡大を防止した後に、仕切り扉２１を開けて搬送容器５を搭載した搬送台車４をＡ区域３に引き出し、仕切り扉２１を閉じて、任意の処理場所に搬送する。
なお、昇降台４１は廃棄物投入孔１２の下に設備され、台車４で運ばれた搬送容器５を移して鉛直方向に駆動するものであってもよい。 FIG. 8 is a diagram illustrating a state in which the transport container 5 is carried out to the A section 3.
After confirming safety by wiping inspection and fixing the container lid 51 to prevent the spread of contamination, the partition door 21 is opened, the transport carriage 4 carrying the transport container 5 is pulled out to the area A 3, and the partition door 21 is closed. , Transport to any processing place.
In addition, the raising / lowering stand 41 may be installed under the waste injection | throwing-in hole 12, and the transfer container 5 conveyed with the trolley | bogie 4 may be moved and driven to a perpendicular direction.

図１２は別の態様の容器蓋と仕切り板を示す断面図である。
搬送容器の側板７１の上端に容器梁７２が設けられ、容器梁７２の内側に容器蓋７３が掛けられる。容器蓋７３の端部は容器梁７２に懸かるフランジが設けられ、ボルトでフランジを容器梁７２に止めて容器内を密封する。
容器蓋７３の上面には仕切り板８２と合わすためのナット７４が適当数設けられている。ナット７４のネジ孔は容器蓋７３を貫通しないようにして、搬送容器の気密を維持できるようにする。 FIG. 12 is a cross-sectional view showing another embodiment of a container lid and a partition plate.
A container beam 72 is provided at the upper end of the side plate 71 of the transport container, and a container lid 73 is hung inside the container beam 72. A flange that hangs on the container beam 72 is provided at the end of the container lid 73, and the inside of the container is sealed by fixing the flange to the container beam 72 with a bolt.
An appropriate number of nuts 74 for mating with the partition plate 82 are provided on the upper surface of the container lid 73. The screw hole of the nut 74 does not penetrate the container lid 73 so that the airtightness of the transport container can be maintained.

Ｃ区域の床面に仕切り架台梁８１が四角く巡らされて、廃棄物を搬送容器に投入するための方形の廃棄物投入孔が設けられている。
廃棄物投入孔には周囲に鍔を有する仕切り板８２が嵌め込まれて、鍔の部分でボルト８５で架台梁８１に固定され、Ｃ区域を密封して安全を確保する。
仕切り板８２は面積が大きいので、適当な数の補強材８３が装着されている。また、容器蓋７３のナット７４に対応する位置にボルト孔８４が設けられていて、ボルト８６をナット７４に螺合させることにより仕切り板８２と容器蓋７３を結合することができる。 A partition beam 81 is circulated in a square shape on the floor surface of the C area, and a rectangular waste input hole is provided to input the waste into the transport container.
A partition plate 82 having a gutter is fitted in the waste input hole, and is fixed to the gantry beam 81 with a bolt 85 at the gutter portion, and the C area is sealed to ensure safety.
Since the partition plate 82 has a large area, an appropriate number of reinforcing members 83 are attached. A bolt hole 84 is provided at a position corresponding to the nut 74 of the container lid 73, and the partition plate 82 and the container lid 73 can be coupled by screwing the bolt 86 into the nut 74.

容器蓋７３と仕切り板８２を用いるときは、搬送容器をＢ区域に持ち込んで容器蓋７３のボルト７５を外し、搬送容器を持ち上げ、容器梁７２の上面が仕切り架台梁８１の下面に当接させて気密を確保した後に、ボルト８６で仕切り板８２と容器蓋７３を縫い付けて一体化し、鍔を固定するボルト８５を抜いて動かせるようにする。
その後、仕切り板８２と容器蓋７３の一体化物をクレーンで吊って適当な場所に移動し仮置きする。こうして解放された廃棄物投入孔の開口から、廃棄物を搬送容器内に吊り下ろして収納する。
重量物を収納すると搬送容器が沈もうとするので、沈み具合を変位計で測定してボールネジ式リフト機構で相殺し、Ｃ区域とＢ区域の間の気密を確保する。 When using the container lid 73 and the partition plate 82, bring the transport container into the B area, remove the bolt 75 of the container lid 73, lift the transport container, and bring the upper surface of the container beam 72 into contact with the lower surface of the partition frame beam 81. After securing the airtightness, the partition plate 82 and the container lid 73 are sewn and integrated with the bolt 86, and the bolt 85 for fixing the heel is pulled out and moved.
Thereafter, the integrated product of the partition plate 82 and the container lid 73 is suspended by a crane, moved to an appropriate place, and temporarily placed. The waste is suspended and stored in the transfer container from the opening of the waste input hole thus released.
When a heavy object is stored, the transport container tends to sink. Therefore, the sinking state is measured by a displacement meter and offset by a ball screw type lift mechanism to ensure airtightness between the C area and the B area.

廃棄物を収納した後、仕切り板８２と容器蓋７３の一体化物をクレーンで吊って来て、廃棄物投入孔に吊り下ろし、ボルト８６を抜いて仕切り板８２と容器蓋７３を離し、仕切り板８２を仕切り架台梁８１に固定してＣ区域をシールする。
搬送容器を下降させると、容器蓋７３は容器梁７２に付いて下がるので、ボルト７５で鍔を容器梁７２に固定して容器内を気密にする。
その後、容器表面、特に容器蓋７３の周縁部を拭き取り検査して汚染がないことを確認した上で、Ａ区域に引き出す。 After storing the waste, the integrated product of the partition plate 82 and the container lid 73 is suspended by a crane, suspended in the waste input hole, the bolt 86 is pulled out, the partition plate 82 and the container lid 73 are separated, and the partition plate 82 is fixed to the partition beam 81 and the area C is sealed.
When the transport container is lowered, the container lid 73 is attached to the container beam 72 and is lowered, so that the jar is fixed to the container beam 72 with a bolt 75 to make the inside of the container airtight.
Thereafter, the container surface, in particular, the peripheral edge of the container lid 73 is wiped and inspected to confirm that there is no contamination, and then drawn out to the A area.

本発明の放射性廃棄物搬送容器機構によれば、搬送容器をＣ区域に持ち込まずに廃棄物投入孔に開口を合わせて内部をＣ区域に解放し、Ｃ区域の放射性廃棄物を容器内に収納するため、容器本体の外表面が汚染されない。
また、容器蓋の表面は仕切り板の下面で覆って一体化したものとしてＣ区域に取り込むため、容器蓋の表面側汚染も少ない。
したがって、放射性廃棄物を収納した搬送容器について拭き取り検査の対象となるのは容器蓋部分だけであって、対象面積が顕著に減少する。 According to the radioactive waste transport container mechanism of the present invention, the transport container is not brought into the C area, the opening is aligned with the waste input hole and the inside is released to the C area, and the radioactive waste in the C area is stored in the container. Therefore, the outer surface of the container body is not contaminated.
Further, since the surface of the container lid is covered with the lower surface of the partition plate and integrated into the area C, the surface of the container lid is less contaminated.
Therefore, only the container lid portion is the object of the wiping inspection for the transport container containing the radioactive waste, and the target area is significantly reduced.

このため、搬送容器をＣ区域に持ち込んで廃棄物を収納しＡ区域に搬出する従来の方法では、容器の搬入搬出を含めた処理時間が１０５分程度かかると想定されるのに対して、本実施例の方法により検査対象面積を減少させることができたときには５５分程度にほぼ半減すると算定される。
なお、本発明の機構を利用すると、Ｂ区域における汚染検査も、Ｃ区域に接触した可能性があるフランジ接触面や容器蓋周辺部などの汚染の可能性が高い部分を重点的に検査することで足りるから、処理時間はさらに短縮することができる。 For this reason, in the conventional method of bringing the transport container into the C area, storing the waste, and transporting it to the A area, it is assumed that the processing time including the loading and unloading of the container takes about 105 minutes. When the area to be inspected can be reduced by the method of the embodiment, it is calculated to be almost halved to about 55 minutes.
In addition, if the mechanism of the present invention is used, the contamination inspection in the B area also focuses on the high possibility of contamination such as the flange contact surface and the peripheral part of the container lid that may have contacted the C area. Therefore, the processing time can be further shortened.

また、管理区域に搬送容器を持ち込むたびに養生シートを取り付けて作業し管理区域での作業が終了すると養生シートを取り外して容器を持ち出す方法も利用されてきた。この従来方法では、養生シートが２次廃棄物になるので、この処分が問題となる。
本実施例の方法では、このような２次廃棄物が発生しない。 In addition, a method has been used in which a curing sheet is attached each time a transport container is brought into the management area, and the container is taken out after the curing sheet is removed. In this conventional method, since the curing sheet becomes secondary waste, this disposal becomes a problem.
In the method of this embodiment, such secondary waste is not generated.

本発明の放射性廃棄物搬送容器機構における１実施例に係る搬送容器をＣ区域の床下に取り込む前の状態を表す図面である。It is drawing which shows the state before taking in the conveyance container which concerns on one Example in the radioactive waste conveyance container mechanism of this invention under the floor of C area. 本実施例の搬送容器をＣ区域の廃棄物投入孔の下に配設した状態を表す図面である。It is drawing showing the state which has arrange | positioned the conveyance container of a present Example under the waste injection hole of C area. 本実施例の搬送容器の蓋をＣ区域に吊り上げた状態を表す図面である。It is drawing showing the state which lifted the lid | cover of the conveyance container of a present Example to C area. 本実施例の搬送容器に廃棄物を収納する状態を表す図面である。It is drawing which shows the state which accommodates a waste in the conveyance container of a present Example. 本実施例の搬送容器に再び蓋を吊り下ろした状態を表す図面である。It is drawing showing the state which suspended the lid | cover again in the conveyance container of a present Example. 本実施例の搬送容器をＣ区域から切り離した状態を表す図面である。It is drawing showing the state which separated the conveyance container of a present Example from C area. 本実施例の搬送容器を拭き取り検査する状態を表す図面である。It is drawing showing the state which wipes and inspects the conveyance container of a present Example. 本実施例の搬送容器をＡ区域に搬出した状態を表す図面である。It is drawing showing the state which carried out the conveyance container of a present Example to A area. 本実施例の搬送容器と廃棄物投入孔の接合部分を拡大して表示した断面図である。It is sectional drawing which expanded and displayed the junction part of the conveyance container and waste input hole of a present Example. 本実施例の搬送容器と廃棄物投入孔が接合したときの状態を示す断面図である。It is sectional drawing which shows a state when the conveyance container and waste input hole of a present Example have joined. 本実施例の搬送容器と廃棄物投入孔の接合部材を吊り上げたときの部分断面図である。It is a fragmentary sectional view when the joining member of the conveyance container and waste input hole of a present Example is lifted. 本発明の別の実施例を表す拡大断面図である。It is an expanded sectional view showing another example of the present invention. 従来の放射性廃棄物搬送容器機構の例を示す図面である。It is drawing which shows the example of the conventional radioactive waste conveyance container mechanism.

符号の説明Explanation of symbols

１ Ｃ区域
２ Ｂ区域
３ Ａ区域
４ 搬送台車
５ 搬送容器
６ 放射性廃棄物
１１ 仕切り床
１２ 廃棄物投入孔
１３ 仕切り板
１４ ボルト
１５ ボルト孔
１６ 長ボルト１５
１７ 容器位置決めガイド
２１ 仕切り扉
４１ 昇降台
４２ ボールねじ式リフト機構
４３ 非接触式変位計
４４ リンク式昇降機
５１ 容器蓋
５２ 容器本体
５３ フランジ
５４ ゴムパッキン
５５ 鍔
５６ ボルト
５７ ねじ孔
７１ 搬送容器側板
７２ 容器梁
７３ 容器蓋
７４ ナット
７５ ボルト
８１ 仕切り架台梁
８２ 仕切り板
８３ 蓋補強材
８４ ボルト孔
８５ ボルト
８６ ボルト
DESCRIPTION OF SYMBOLS 1 C area 2 B area 3 A area 4 Carriage cart 5 Carrying container 6 Radioactive waste 11 Partition floor 12 Waste input hole 13 Partition plate 14 Bolt 15 Bolt hole 16 Long bolt 15
17 Container positioning guide 21 Partition door 41 Lifting table 42 Ball screw type lift mechanism 43 Non-contact displacement meter 44 Link type elevator 51 Container lid 52 Container body 53 Flange 54 Rubber packing 55 ５６ 56 Bolt 57 Screw hole 71 Transport container side plate 72 Container Beam 73 Container lid 74 Nut 75 Bolt 81 Partition frame beam 82 Partition plate 83 Lid reinforcement 84 Bolt hole 85 Bolt 86 Bolt

Claims (5)

仕切り板で開口を開閉可能に塞げるようにした廃棄物投入孔を汚染区域の床面に設け、容器蓋を着脱可能に取り付けた搬送容器と、合体した前記仕切り板と前記容器蓋を吊り下げて昇降させる吊下装置と、前記廃棄物投入孔の下に位置して前記搬送容器を鉛直方向に移動可能に載置する昇降台を備え、前記仕切り板には長ボルトが貫通するボルト孔が設けられており、前記容器蓋の上面には該容器蓋を貫通しないねじ孔が設けられていて前記ボルト孔を貫通した長ボルトの先端を螺入することにより、前記仕切り板の下面と前記容器蓋の外表面を合わせて気密に固定する機構を備えることを特徴とする放射性廃棄物搬送容器機構。 Provided waste input hole which is adapted Fusageru the opening to be opened and closed by a partition plate on the floor of the contaminated area, hanging a transport container fitted with the lid detachably with said partition plate coalesced said lid a suspension device for lifting Te, located below the waste filling hole provided with a lifting platform for placing movably the transport container in the vertical direction, the said partition plate bolt holes long bolt penetrates It provided, on the upper surface of the container lid by screwing the tip of the long bolt passing through the bolt holes have a screw hole is provided which does not pass through the container lid, the lower surface of the partition plate container A radioactive waste transport container mechanism comprising a mechanism for hermetically fixing the outer surface of the lid together. 前記搬送容器の縁と前記廃棄物投入孔の縁が当接するところにゴムパッキンを備えることを特徴とする請求項１記載の放射性廃棄物搬送容器機構。   The radioactive waste transport container mechanism according to claim 1, further comprising a rubber packing at a position where an edge of the transport container and an edge of the waste input hole come into contact with each other. 前記昇降台は車輪を備えて水平方向に移動可能な台車に設けられることを特徴とする請求項１または２記載の放射性廃棄物搬送容器機構。   The radioactive waste transport container mechanism according to claim 1, wherein the lifting platform is provided on a cart having wheels and movable in a horizontal direction. 前記昇降台には、非接触式変位計と、その測定値に基づいて前記昇降台を昇降させる高さ調整機構を備えることを特徴とする請求項１から３のいずれかに記載の放射性廃棄物搬送容器機構。   The radioactive waste according to any one of claims 1 to 3, wherein the lifting platform includes a non-contact displacement meter and a height adjustment mechanism that lifts and lowers the lifting platform based on a measured value thereof. Transport container mechanism. 前記高さ調整機構は、ボールねじ式リフト機構であることを特徴とする請求項４記載の放射性廃棄物搬送容器機構。

The radioactive waste transport container mechanism according to claim 4, wherein the height adjustment mechanism is a ball screw type lift mechanism.

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