JP4155868B2

JP4155868B2 - Melt-solidified body suspension device

Info

Publication number: JP4155868B2
Application number: JP2003132979A
Authority: JP
Inventors: 誠伊崎; 五月武仲; 俊司吉澤; 一郎河口
Original assignee: Kawasaki Plant Systems Ltd
Current assignee: Kawasaki Plant Systems Ltd
Priority date: 2003-05-12
Filing date: 2003-05-12
Publication date: 2008-09-24
Anticipated expiration: 2023-05-12
Also published as: JP2004333424A

Description

【０００１】
【発明の属する技術分野】
本発明は、吊下げ対象の重量物を遠隔操作で吊り下げる吊下装置に関し、とくに低レベル放射性廃棄物の溶融固化体をドラム缶に収納するのに適した溶融固化体吊下装置に関する。
【０００２】
【従来の技術】
原子力発電所や放射性物質取扱施設などで発生する放射能レベルの低い各種の固体廃棄物は、高周波溶解炉で溶解・固化させて減容した上、ドラム缶に詰めて埋設処分される。通常は、キャニスタと呼ばれるセラミックス製の坩堝型容器内で溶解し、そのまま固化させた溶融固化体を２００リットルのドラム缶に収納し、溶融固化体とドラム缶との間隙にモルタルを充填して、所定の処分場所（例えば地下埋設設備）に埋設される。その際に、ドラム缶等の資材の利用効率を高めるという要請及び埋設場所の空間の利用効率を高めるという要請から、溶融固化体とドラム缶との間隙をできるだけ小さく、例えば１０ｍｍ程度以下にすることが強く望まれている。
【０００３】
通常、重量の大きな物体をドラム缶に収納するには、ワイヤロープやナイロンスリングで玉掛けして、クレーン等でドラム缶内に吊り下ろすような方法がとられる。しかし、ドラム缶内で玉掛けを解除するには、物体とドラム缶との間に数１０ｍｍの間隙が必要である。また、昇降可能なチャック機構で物体の胴部を把持して、ドラム缶内に収納する方法もあるが、物体とドラム缶との間にチャックの先端を挿入せねばならず、やはり大きな間隙が必要である。したがって、溶融固化体を上記の方法で処理することはできない。
また、溶融固化体は、強度や形状の点からフックや真空吸着機などを用いてキャニスタ上部を把持して支持することは困難である。さらに、溶融固化体を容器に収納する作業は、放射性物質を扱うため隔離された部屋で遠隔操作により行うので、できるだけ単純な作業で組み立てられることが要請される。
【０００４】
特許文献１には、上記の問題を解決するために、あらかじめ溶融固化体の天地を逆さまにして置き、上部からドラム缶を被せた後、溶融固化体をドラム缶ごと反転させる円柱体のドラム缶収容方法が提案されている。また、特許文献２には、傾斜させたドラム缶の入口部に傾斜ガイドを挿入し、このガイドに溶融固化体を載置し、これをガイドとともに又はその上をスライドさせてドラム缶内に収納する円柱体のドラム詰め方法及び装置が提案されている。
しかし、これらの方法は装置が複雑で大きくなり、設備コストが高くなるという問題がある。
【０００５】
【特許文献１】
特開平８−２４８１９３号公報
【特許文献２】
特開平１１−２７１４９６号公報
【０００６】
【発明が解決しようとする課題】
そこで本発明は、大がかりな設備を用いることなく簡単な機構によって、吊下げ対象の重量物とくに放射性廃棄物の溶融固化体を、容器壁面との間隙がごく僅かな収納容器内に、遠隔操作で収納し得る手段を提供することを目的とする。
【０００７】
【課題を解決するための手段】
上記課題を解決するため、本発明の溶融固化体吊下装置は、吊手が設けられたフランジと、フランジの周方向にほぼ等間隔に吊り下げられ少なくともその下部を内側に曲げることができる複数の等長の縦索と、それら縦索のそれぞれの下端を繋いで円環状に引き絞る引綱と、この引綱を引いたり緩めたりする駆動装置を備えて、溶融固化体の周囲に縦索を垂れ降ろして縦索の先端を円環状に引き絞り溶融固化体を支持して吊り上げるようにしたことを特徴とする。
【０００８】
また、本発明の溶融固化体吊下装置は、さらに、縦索の下端を繋いで円環状に引き絞る引綱を支持する止め具をそれぞれの縦索下端に備える。この引綱は止め具を順次連絡して環状部分を形成し、さらに環状部分の径を拡大縮小するための引手部分を形成する。引手部分は巻上機が繋げられていて、環状部分の径を広げて縦索を吊下げ対象物である溶融固化体の周囲に垂れ下げ、巻上機により引綱の引手部分を引き上げて、その環状部分を引き絞って溶融固化体を底から支持して吊下げ可能にすることを特徴とする。
【０００９】
上記の構成によれば、縦索とその下端を環状に引き絞る引綱が吊り具となり、巻上機による引綱の引手部分の上下動のみによって、溶融固化体を吊下げ可能な状態にしたり、引綱の環状部分を弛めて吊下げ状態の解除を行うことができる。したがって、本装置の下部、すなわち縦索、その先端の止め具及び引綱が、溶融固化体と収納容器との間隙に入りさえすれば、溶融固化体を容器底部に静置した後、本装置を引き上げることができ、この間隙が１０ｍｍ程度以下であっても遠隔操作で容易に収納することができる。
【００１０】
また、本発明の装置は、止め具を環状に繋ぐばねを備え、引綱を弛めたときに、このばねの弾性力により縦索の間隔が開き環状部分の径を広げるように構成したものであってもよい。この構成によれば、引綱を弛めた時に、ばねの弾性力で引綱の環状部分が確実に押し拡げられるため、縦索をほぼ垂直に垂下させることが容易になる。したがって、縦索を溶融固化体の周囲に垂れ下げる時や縦索を収納容器から引き上げる時に、縦索及びその先端の止め具が溶融固化体または容器内壁と接触するのを防止することができ、本装置をスムーズに昇降させることが可能になる。
【００１１】
この装置は、上記のばねとして、その内径が引綱の径より大きいコイルばねを用い、該コイルばねの内部に引綱を環状に挿通してなるものであってもよい。この構成によれば、ばねと引綱が一つにまとめられ、縦索先端の止め具も小型になるため、本装置を溶融固化体に被せる時及び収納容器から引き上げる時に、下部の止め具等が溶融固化体又は容器内壁と接触しにくくなり、本装置をよりスムーズに昇降させることが可能になる。
【００１２】
さらに、本発明の装置は、縦索の中間に、隣接する縦索相互を環状に連結する横索を配したものであってもよい。この横索は、縦索を溶融固化体の周囲に吊り下ろす時に、縦索が振れたり捩れたりするのを防止するのに有用である。
本発明の装置は、キャニスタ内で溶融固化された低レベル放射性廃棄物の溶融固化体をドラム缶内に収納するのに、好適に用いることができる。
なお、縦索は強度さえあれば材質を選ばず、形状も棒状の索、帯状の板、鎖など各種のものが利用できる。また筒状に編んだ金属やプラスチックなどの網であってもよい。
【００１３】
【発明の実施の形態】
以下実施例を用いて本発明を詳細に説明する。
図１は、本発明の１実施例である溶融固化体吊下装置の正面図で、溶融固化体を吊り下げた状態を示す。この装置は、フランジ１、多数の縦索２、その下端の止め具３、環状のばね４、引綱５及び巻上機６等から構成され、縦索２を吊下げ対象物である溶融固化体７の周囲に垂れ下げ、その下端を引綱５で引き絞って、図示していないクレーン等により溶融固化体７の吊上げ、吊下しを行うものである。
【００１４】
フランジ１は円板状で、クレーン等により吊り下げる吊手８が設けられている。本実施例では、このフランジ１の外周付近から、その周方向に等間隔に８本の等長の縦索２が吊り下げられている。縦索はロープ状であるが、これが帯状であっても差し支えない。縦索２は溶融固化体の重量を複数で支えるので所定の強度を有していればよく、ワイヤロープの他、麻ロープ、ビニロンロープ、ナイロンロープ等の繊維ロープであってもよい。また、帯状のナイロンスリングやチェーン等であってもよい。ドラム缶などの収納容器の内壁と溶融固化体の外壁の間隙が小さい場合には、薄い帯索を用いることができる。
【００１５】
縦索２は、互いの先端を円形に繋いで絞り込み溶融固化体が落ちないようにするので、少なくともその下部が曲げ可能である必要があるが、全長に亘って曲げ可能でも良く、あるいは下部の先端のみが曲げ可能であってもよい。したがって、縦索２に２種の材料を用い、上部に剛性材料を下部に可撓性（曲げ可能な）材料を用いて、両者を接合して構成してもよい。溶融固化体７とこれを収納する容器との間隙をなるべく狭くするという目的から、縦索２の太さ又は厚みはなるべく小さくすることが望ましい。多数の縦索で吊下げ対象物の重量を支えるため、縦索２の太さ又は厚みを１０ｍｍ以下にすることができる。なお、縦索の太さや厚みをさらに小さくしたければ、縦索の数を増やせばよい。
【００１６】
縦索２の下端には、止め具３がそれぞれ取り付けられている。本実施例では、角形の金属性の止め具３を用い、銅製のワイヤーロープからなる縦索２の下端に接合している。また、縦索２の中間に、それぞれの縦索２を横方向に環状に繋ぐ横索９が接合されており、この横索９は、縦索２の間隔を一定に保つ機能を有し、本装置を溶融固化体７に被せるときに、縦索２が振れたり、捩れたりするのを防止するのに有用である。
【００１７】
止め具３の側面を繋ぐようにばね４が取り付けられていて、このばね４は、引綱５を弛めた時に縦索２を押し拡げ、縦索をほぼ垂直に垂下させる機能を有する。止め具３には、外側に開口する切欠き溝１０が設けられ、この切欠き溝１０内に引綱５を嵌め込んで引綱が緩んでも外れないように係止している。なお、前記と同じく溶融固化体と容器の間隙を狭くするという目的から、止め具３の厚み（半径方向の寸法）、ばね４の径や横索９の太さも、縦索２の太さと同程度又はそれ以下にすることが好ましい。
【００１８】
引綱５は、止め具３によって縦索２を環状に繋ぎ輪止め用の係止部材１１によつて環状部分を形成し、係止部材１１から引手部分が上方に延びて巻上機６で巻き上げられるようになっている。引綱５の環状部分は、縦索２に直角な方向に移動可能に止め具３に係止され、引綱５の引手部分を引いたり緩めたりして、その環状部分の径（縦索２の下端を横方向に繋ぐ輪の径）を拡大・縮小するようになつている。なお、輪止め用の係止部材１１の側面にも、ばね４が取り付けられていて、ばね４は全周に亘って環状になっている。
【００１９】
巻上機６は、正逆回転可能なモーター１２と引綱を巻き込むドラム１３からなり、溶融固化体７を吊り下げる時には、引綱５の引手部分を引き込んで引綱の環状部分の径を絞り、溶融固化体が引綱５端末の穴から落ちないようにして、吊手８で吊り上げる。このとき、複数の引綱５の張力で溶融固化体７の荷重を支持する。引綱５は、溶融固化体７を吊り下げた時に、環状部分にかかる張力に耐える強度を有することが必要で、本実施例ではワイヤーロープを用いているが、ナイロンロープ等であってもよい。
【００２０】
図２は、本装置に用いられるばねの種類を示す概念図である。本実施例では、図２（ａ）に示すようなコイルばねを用いているが、図２（ｂ）に示すような帯板状の板ばねであってもよく、あるいは図２（ｃ）に示すような波形の板ばねであってもよい。コイルばねや波形板ばねでは、ばねのピッチの伸縮でばねの長さが変わるため、引綱５を引き絞ってもばねが外側に張り出すことはない。帯板バネの場合は、引綱５を引き絞るとばねが外側に撓むことになるが、溶融固化体７の下端部は丸みを帯びた形状で、円筒容器との間に空間があるため、帯板ばねが撓んで外側に張り出しても、とくに問題になることはない。ばねの材質はとくに限定を要しないが、通常は高弾性金属が用いられ、コイルばねの径や波形板ばねの波高又は幅は１０ｍｍ以下のものを用いることが望ましい。
【００２１】
図３は、本装置に用いられる引綱の輪止め用係止部材の形状の例を示す概念図である。図３（ａ）の例では、係止部材１１の一方の側面に接続端子１４が設けられ、他方の側面から上方に抜ける貫通孔１５が設けられている。引綱５は、ドラムから引手部分として引き出されて、係止部材１１の上面の貫通孔１５から側面に通され、縦索下端の止め具に順次係止されて一巡して環状部分を形成し、その先端が係止部材１１の側面の接続端子１４に接合されて固定される。
【００２２】
図３（ｂ）の例では、止め具の内の１個を輪止め用係止部材を兼ねた止め具としたものである。すなわち、特定の縦索２の下端に取り付けられた止め具３が輪止めと兼用されるもので、止め具３の一方の側面には接続用フック１６が設けられ、これと反対側の側面から外側の面に抜ける貫通孔１５が設けられている。引綱５の先端にはリング１７が取り付けられ、これが接続用フック１６に係止されている。
引綱５は接続用フック１６から貫通孔１５までの環状部分を形成し、貫通孔１５のフックと反対側の孔から外側の孔に抜けて引手部分を形成している。リング１７は貫通孔１５を通らないので、ドラムに固定する端部の方から貫通孔１５に通すようにする。なお、引綱で環状部分を形成した後に引綱５をリング１７に固定し接続用フック１６に掛けるようにしてもよい。
【００２３】
引綱５の引手部分は、縦索２に沿ってその外側を上方に延び、巻上機で上下動される。したがって、引綱５が溶融固化体の表面に接触しないため、引綱５の上下動で溶融固化体を痛めることがない。
なお、図３（ａ）及び（ｂ）のいずれの場合も、係止部材１１又は止め具３の両側面にばね４が接合されさらに全周を環状に繋いでいるので、引綱５を緩めたときに縦索２の先端が外側に広がって溶融固化体の周囲を上下に移動することができる。
【００２４】
図４は、本実施例の別態様である溶融固化体吊下装置の図で、図４（ａ）は全体の正面図、図４（ｂ）は図４（ａ）のＡ部の拡大図である。この装置も、フランジ１の形状、縦索２や横索９の配置や巻上機６の構成等は、図１の装置と同様である。しかし、この装置は、コイルばね４の内部に引綱５を引き回している点が図１の装置と相違する。すなわち、図４（ｂ）に見られるように、縦索２の先端の止め具３の両側面にコイルばね４が接合されているが、このばね４の位置で、止め具３に貫通孔１５が形成され、バネ４の中を通る引綱５が貫通孔１５にも通されている。引綱５には、図３（ａ）に示したような係止部材１１により環状部分が形成され、引手部分が上方に引き出されて、巻上機６に接続されている。
【００２５】
このような構成では、ばね４と引綱５が一つにまとまっているので引綱の緊張と緩和に忠実に応答して縦索２の末端に形成される環状部分は確実に開閉し、また止め具３も小型になるため、本装置を溶融固化体に被せる時に、下部の止め具等が溶融固化体に接触ししにくくなり、本装置をよりスムーズに昇降させることが可能になる。
【００２６】
図５は、本実施例のさらに別の態様である溶融固化体吊下装置の正面図である。この装置も、フランジ１の形状、縦索２の配置、止め具３の形状、引綱５や巻上機６の構成等は、図１の装置と同様である。しかし、この装置は、縦索２の構造が異なる点とばねの代わりに重力を用いる点が、図１の装置と相違する。
縦索２の上部には、剛性材料例えば銅製の丸棒や帯板が用いられ、その下側に曲げ可能な材料としてチェーン２’が接続されている。チェーン２’の下端には止め具３が接続されているが、本装置では止め具間を連結するばねは配されていない。引綱５は、図１の装置と同様に、縦索２に直角な方向に移動可能に止め具３に係止され、一巡して環状部分を形成した後、係止部材１１により引手部分が上方に引き出されている。巻上機６により、引綱５の引手部分を上下動させて、その環状部分の径を拡大・縮小させるように構成されている点も、図１の装置と同様である。
【００２７】
図５の構成によれば、チェーンおよび止め具の自重により、縦索２とチェーン２’は垂直に垂下する。したがって、引綱５を引き絞っていない状態では、格別な手段例えばばねの弾性力等により縦索２の間隔を押し拡げなくとも、縦索２の下端は十分に開いた状態になり、これを溶融固化体の周囲に引き下ろすことに特に支障は生じない。なお、図５の装置では、チェーンとしてリンクチェーンを用いているが、これがローラチェーンであっても差し支えない。また、必ずしもチェーンに限定する必要は無く、曲げ可能であり、かつ自重又は止め具の重量で垂直に垂下する材料であればよい。また、少なくとも縦索２の下部が曲げ可能であればよく、縦索２の全長に亘ってチェーン等の曲げ可能な材料を用いてもよい。
【００２８】
図６は、本実施例の装置を利用して溶融固化体を円筒容器に収納する作業手順の説明図である。まず、図６（ａ）に示すように、本装置をクレーン等（図示していない）で吊り下ろし、縦索２を溶融固化体７の周囲に垂れ下げる。この際引綱５を弛めておけば、ばね４の弾性力により縦索２の間隔が開き、ほぼ垂直に垂下した状態になる（過剰に開かないように引綱５の引張り量を調整してもよい）ので、支障無く本装置を吊り下ろすことができる。なお、後述するように、溶融固化体７は、適当な径の置台１８の上に載置しておくことが好ましい。
【００２９】
縦索２の下端が溶融固化体７の底面より下に位置するまで吊り下ろした後、図６（ｂ）に示すように、巻上機６で引綱５を引いて、ばね４（および引綱５）の環状部分の径を溶融固化体の径より小さくし、引綱５に張力がかかった状態で保定すれば、縦索２の下端が引き絞られて環状になる。したがって、この状態でクレーン等で吊り上げると環状に繋がった縦索２の末端部が溶融固化体７の底に当たつて、溶融固化体を持ち上げることができる。さらに吊り上げて溶融固化体を浮かせて、この状態で収納容器であるドラム缶の位置まで運搬すればよい。
【００３０】
ついで、図６（ｃ）に示すように、溶融固化体７がドラム缶１９の底に着くまで吊り下ろした後、図６（ｄ）に示すように、引綱５を弛めて、ばね４の弾性力により縦索２の下端の間隔を開かせ、本装置を吊り上げれば、溶融固化体７が取り残されてドラム缶１９内に収納された状態になる。この際、縦索２及びその下端の止め具３は、溶融固化体７の底の湾曲部に沿って動くから、本装置を容易に引き上げることができる。
【００３１】
本装置の吊下げ対象物である溶融固化体７は、所定の形状の容器（キャニスタ）内で放射性廃棄物を溶解・固化させたもので、円筒状の胴部の下部全周に一定曲率の湾曲部が形成されている。２００リットルのドラム缶に収納する場合のキャニスタは、例えば、胴部外径が約５５０ｍｍで、底部全周に９０Ｒの湾曲部が形成され、底面中央の径約３７０ｍｍ程度の部分は平面になっている。
したがって、図６（ｂ）に示したように、縦索２の下端を引き絞る場合には、止め具３がこの湾曲部に位置するようにすることが好ましい。この状態であれば、溶融固化体７をドラム缶１９内に吊り下ろした時に、その底が先に着地するので、溶融固化体７を床面に置いて引綱５を弛めたときに落下の衝撃が生じることはない。また、引綱５を緩めたときに止め具３が溶融固化体と床面に制約されないで自由に動くので、簡単に溶融固化体を容器に収納することができる。
【００３２】
止め具３を溶融固化体の湾曲部に正しく位置させるために、図６（ａ）に示すように、置台１８を用いることが好ましい。置台１８の径を、溶融固化体７の底面の平坦部の径（３７０ｍｍ程度）と同程度又はこれよりやや大きくしておけば、引綱５を引き絞った時に止め具３がこの置台１８に当たるから、この状態で引綱を固定して吊り上げれば良い。
なお、容器の底に図６（ｂ）の置台１８と同様の置台を仕込んでおいて、この上に溶融固化体を載置するようにしてもよい。
【００３３】
本発明の溶融固化体吊下装置は上記のように構成されているため、引綱の動作のみによって、縦索下端の環状部分の径の縮小と拡大を行うことができる。したがって、縦索、止め具やこれを繋ぐばね等が溶融固化体とドラム缶との間隙に入りさえすれば、溶融固化体を吊り下げたり、吊下げ状態を解除したりすることができる。縦索の本数を多くすれば、その１本にかかる荷重が小さくなり、縦索の径又は厚みを小さくすることができるから、縦索、止め具やこれを繋ぐばね等の径又は厚みを１０ｍｍ程度以下にすることにはさほどの困難さはなく、溶融固化体とドラム缶との間隙を１０ｍｍ程度以下にするという目標を十分達成する。
【００３４】
本発明の装置は構造が非常に簡単であり、前述の特許文献に提案されている方法のように、溶融固化体やドラム缶を転倒又は傾斜させるための大がかりな設備を必要としない。また、その作業もクレーンと引綱の遠隔操作による吊上げと吊下しのみであり、前述の特許文献の方法よりも作業工程が簡単である。
本発明の装置の吊下げ対象物と収納容器を、溶融固化体とドラム缶に限定する必要はなく、各種の円柱体をこれに適合する容器に収納するのに用いることができる。また、必ずしも吊下げ対象物が円柱体である必要はなく、その断面形状や表面状態に適した構造や材質の縦索、止め具、ばね等を用いることにより、様々な対象物の吊上げ、吊下しを行うことが可能である。
【００３５】
また、本発明の装置の、装置各部の構造、形状等は上記実施例のものに限られない。例えば、フランジ、止め具、ばね、引綱の係止部材等の形状は実施例のものに限定するを要しない。また、縦索や横索の材質、形状、配置、その吊下げ方法等も本実施例のものに限定するを要しない。縦索を全長に亘って同種の材料で形成する必要がないことは既に述べたとおりであるが、例えば、フランジの下側に縦索と横索を組み合わせた円筒形の籠状の構造体を取付け、その下側に多数の曲げ可能な縦索を吊り下げたような構造であってもよい。あるいは、縦索と横索が網状に形成されてるようなものであってもよい。さらに、巻上機は必ずしもモーターとドラムの組み合わせでなくともよい。引綱を所定距離上下動させかつ張力がかかった状態を保持できるものであれば良く、例えば油圧等の流体圧駆動のものでもよい。
【００３６】
また、縦索を溶融固化体の周りに沿って降ろし易くするために、縦索を吊り下げたフランジの周縁部を径方向に拡大縮小できるようにして、縦索を降ろすときには径を大きくしてもよい。
なお、溶融固化体を定位置に載置した後で縦索を緩めて吊下装置を吊り上げるときに、溶融固化体の底の周縁に形成した丸みを利用して装置の構成を簡約化しコストを削減するようにしてもよい。縦索の先端部を緩めて装置を引き上げれば、先端部を繋いだ円環の径が溶融固化体の丸み部でこじられて自然に拡がるので、バネの代わりにこの作用を利用することにより、装置が簡単になる。
【００３７】
【発明の効果】
本発明の溶融固化体吊下装置は、縦索とその先端を環状に引き絞る引綱で口をすぼめて溶融固化体を支持し吊り下げ吊り上げを行うため、容器壁面との間隙がごく僅かな収納容器を使うときにも遠隔操作で容易に溶融固化体を収納することができる。この装置の構成は簡単かつコンパクトであり、従来の方式に見られるような、溶融固化体や収納容器を転倒又は傾斜させるための大がかりな設備を必要としない。
【図面の簡単な説明】
【図１】本発明の実施例である溶融固化体吊下装置の正面図である。
【図２】本実施例の装置に用いられるばねの種類の例を示す概念図である。
【図３】本実施例の装置における輪止め用係止部材の形状の例を示す概念図である。
【図４】本実施例の別の態様である溶融固化体吊下装置の図である。
【図５】本実施例のさらに別の態様である溶融固化体吊下装置の正面図である。
【図６】本実施例の装置により溶融固化体を円筒容器に収納する作業手順の説明図である。
【符号の説明】
１フランジ
２縦索
２’ チェーン
３止め具
４ばね
５引綱
６巻上機
７溶融固化体
８吊手
９横索
１０切欠き溝
１１係止部材
１２モーター
１３ドラム
１４接続端子
１５貫通孔
１６接続用フック
１７リング
１８置台
１９ドラム缶[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a suspension device for suspending a heavy object to be suspended by remote control, and particularly to a melt-solidified body suspension device suitable for storing a melt-solidified body of low-level radioactive waste in a drum can.
[0002]
[Prior art]
Various solid wastes generated at nuclear power plants and radioactive material handling facilities with low radioactivity levels are dissolved and solidified in a high-frequency melting furnace, reduced in volume, and then packed in drums for disposal. Typically, dissolved in ceramic 坩堝型container called a canister, as the solidified so the solidified products were stored at 200 liter drums, filled with mortar in the gap between the solidified products and drum, predetermined It is buried in the disposal site (for example, underground burial facility). At that time, it is strongly recommended that the gap between the melt-solidified body and the drum can be as small as possible, for example, about 10 mm or less, from the request to increase the utilization efficiency of materials such as drum cans and the utilization efficiency of the space in the buried place. It is desired.
[0003]
Usually, in order to store a heavy object in a drum can, a method of hanging it with a wire rope or nylon sling and hanging it in the drum can with a crane or the like is used. However, in order to release the sling in the drum, a gap of several tens of mm is required between the object and the drum. There is also a method of gripping the body of the object with a chuck mechanism that can be raised and lowered and storing it in a drum can, but the tip of the chuck must be inserted between the object and the drum can, and a large gap is still necessary. is there. Therefore, the melted solid cannot be processed by the above method.
Moreover, it is difficult to hold and support the upper part of the canister by using a hook or a vacuum suction machine from the viewpoint of strength and shape. Furthermore, since the operation of storing the molten solidified body in a container is performed by remote control in an isolated room in order to handle radioactive substances, it is required to be assembled by the simplest possible operation.
[0004]
In order to solve the above-described problem, Patent Document 1 discloses a cylindrical drum can accommodation method in which a molten solid body is placed upside down in advance, covered with a drum can from above, and then the molten solid body is inverted together with the drum can. Proposed. Further, in Patent Document 2, an inclined guide is inserted into an inlet portion of an inclined drum can, and a melt-solidified body is placed on the guide, which is slid along with or on the guide and stored in the drum can. Body drum packing methods and devices have been proposed.
However, these methods have a problem that the apparatus becomes complicated and large, and the equipment cost becomes high.
[0005]
[Patent Document 1]
JP-A-8-248193 [Patent Document 2]
Japanese Patent Application Laid-Open No. 11-271696
[Problems to be solved by the invention]
Therefore, the present invention enables remote operation of a melted and solidified body of a heavy object to be suspended, particularly radioactive waste, in a storage container having a very small gap with the container wall by a simple mechanism without using a large-scale facility. It aims at providing the means which can be accommodated.
[0007]
[Means for Solving the Problems]
To solve the above problems, solidified products suspension apparatus of the present invention, double that can be bent and flange hanger is provided, at least the lower portion thereof suspended at substantially equal intervals in the circumferential direction of the flange on the inside Equipped with a number of equal-length longitudinal cords, a towline that connects the lower ends of the longitudinal cords and draws them in an annular shape, and a drive device that pulls and loosens the pulling cords. It is characterized in that it is hung down and drawn at the tip of a longitudinal cord in an annular shape to support the molten solidified body and lift it.
[0008]
Moreover, the fusion | melting solidification body suspension apparatus of this invention is further equipped with the stopper which supports the tow rope which connects the lower end of a longitudinal line and draws down in an annular | circular shape in each longitudinal line lower end. The pull line connects the stoppers sequentially to form an annular portion, and further forms a pull portion for enlarging and reducing the diameter of the annular portion. The hoisting machine is connected to the hoisting machine, the diameter of the annular part is expanded, the vertical cord is suspended around the molten solidified body that is the object to be suspended, and the hoisting part of the towline is pulled up by the hoisting machine. The annular portion is drawn down to support the molten solidified body from the bottom so that it can be suspended.
[0009]
According to the above configuration, the pulling rope that draws the longitudinal cord and the lower end thereof in a ring shape becomes the lifting tool, and the melted solidified body can be suspended by the vertical movement of the pulling portion of the pulling rope by the hoisting machine, It is possible to release the suspended state by loosening the annular portion. Accordingly, as long as the lower part of the device, that is, the vertical cord, the stopper at the tip thereof, and the towline enter the gap between the molten solidified body and the storage container, the molten solidified body is left at the bottom of the container, and then the apparatus is Even if this gap is about 10 mm or less, it can be easily stored by remote control.
[0010]
In addition, the device of the present invention is provided with a spring that connects the stopper in an annular shape, and when the towline is loosened, the elastic force of this spring opens the longitudinal cord and widens the diameter of the annular portion. There may be. According to this configuration, when the towline is loosened, the annular portion of the towline is surely expanded by the elastic force of the spring, so that it becomes easy to hang the longitudinal cord almost vertically. Therefore, when the vertical cord is hung down around the molten solidified body or when the vertical cord is pulled up from the storage container, it is possible to prevent the vertical cord and the stopper at the tip thereof from coming into contact with the molten solidified body or the container inner wall, This apparatus can be moved up and down smoothly.
[0011]
This device may be formed by using a coil spring having an inner diameter larger than the diameter of the towline as the above-mentioned spring and inserting the towline in an annular shape inside the coil spring. According to this configuration, the spring and the towline are combined into one, and the stopper at the end of the longitudinal cord is also reduced in size, so that when the apparatus is covered with the molten solidified body and pulled up from the storage container, the lower stopper, etc. It becomes difficult to come into contact with the molten solidified body or the inner wall of the container, and the apparatus can be moved up and down more smoothly.
[0012]
Further, the device of the present invention may be one in which a lateral cord that connects adjacent longitudinal cords in a ring shape is arranged in the middle of the longitudinal cord. This Yokosaku, when down hanging Tatesaku around the solidified products are useful for preventing the or is twisted or runout Tatesaku.
The apparatus of the present invention can be suitably used to store a molten solidified body of low-level radioactive waste melted and solidified in a canister in a drum can.
As long as the longitudinal cord has strength, any material can be used, and various shapes such as a rod-like cord, a belt-like plate, and a chain can be used. Further, it may be a net of metal or plastic knitted in a cylindrical shape.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to examples.
FIG. 1 is a front view of a melt-solidified body suspension apparatus according to an embodiment of the present invention, and shows a state in which a melt-solidified body is suspended. This device is composed of a flange 1, a number of longitudinal cords 2, a stopper 3 at the lower end thereof, an annular spring 4, a pulling rope 5, a hoisting machine 6, and the like, and the melted and solidified body that is an object to be suspended. 7, the lower end of the melted solid body 7 is pulled down by the pulling rope 5, and the melted solid body 7 is lifted and hung by a crane or the like (not shown).
[0014]
The flange 1 has a disk shape and is provided with a handle 8 that is suspended by a crane or the like. In this embodiment, eight equal length longitudinal cords 2 are suspended from the vicinity of the outer periphery of the flange 1 at equal intervals in the circumferential direction. Longitudinal cords are rope-shaped, but they can be strip-shaped. The longitudinal cord 2 only needs to have a predetermined strength because it supports a plurality of weights of the melt-solidified body, and may be a wire rope, a fiber rope such as a hemp rope, a vinylon rope, and a nylon rope. Moreover, a belt-like nylon sling, a chain, etc. may be sufficient. When the gap between the inner wall of a storage container such as a drum can and the outer wall of the molten solidified body is small, a thin band can be used.
[0015]
The longitudinal cords 2 are connected to each other in a circular shape so that the melted and solidified body does not fall. Therefore, at least the lower part of the longitudinal cord 2 needs to be bendable. Only the tip may be bendable. Therefore, two types of materials may be used for the longitudinal cord 2 and a rigid material may be used for the upper portion and a flexible (bendable) material may be used for the lower portion, and both may be joined. For the purpose of narrowing the gap between the molten solidified body 7 and the container for storing it, it is desirable to make the thickness or thickness of the longitudinal cord 2 as small as possible. Since the weight of the suspended object is supported by a large number of longitudinal cords, the thickness or thickness of the longitudinal cord 2 can be set to 10 mm or less. In order to further reduce the thickness and thickness of the longitudinal cord, the number of longitudinal cords should be increased.
[0016]
A stopper 3 is attached to the lower end of the longitudinal cord 2. In this embodiment, a rectangular metallic stopper 3 is used to join the lower end of the longitudinal cord 2 made of a copper wire rope. Further, in the middle of Tatesaku 2 has horizontal ropes 9 connecting the respective Tatesaku 2 annularly laterally joined, this Yokosaku 9 has a function to keep a proper distance Tatesaku 2 constant, This is useful for preventing the longitudinal cord 2 from being shaken or twisted when the apparatus is put on the molten solidified body 7.
[0017]
A spring 4 is attached so as to connect the side surfaces of the stopper 3, and this spring 4 has a function of expanding the longitudinal cord 2 when the towline 5 is loosened and drooping the longitudinal cord substantially vertically. The stopper 3, notched groove 10 which opening is provided on the outside, are locked so as not to come off loose towrope crowded because fitting the towrope 5 to the notch groove 10. Incidentally, the purpose of also narrowing the gap between the solidified products and the container and the thickness of the stopper 3 (radial dimension), also the thickness of the diameter or lateral cord 9 of the spring 4, and the thickness of Tatesaku 2 same It is preferable to make the degree or less.
[0018]
The towline 5 is formed by connecting the longitudinal cord 2 in a ring shape with the stopper 3 to form an annular portion by the locking member 11 for locking the ring, and the pulling portion extends upward from the locking member 11 and is wound up by the hoisting machine 6. It is supposed to be. The annular portion of the towline 5 is locked to the stopper 3 so as to be movable in a direction perpendicular to the longitudinal cord 2, and the pulling portion of the towline 5 is pulled or loosened to reduce the diameter of the annular portion (the lower end of the longitudinal cord 2 The diameter of the ring that connects the two in the horizontal direction) is expanded and reduced. A spring 4 is also attached to the side surface of the locking member 11 for locking the ring, and the spring 4 has an annular shape over the entire circumference.
[0019]
The hoisting machine 6 is composed of a motor 12 that can rotate forward and backward and a drum 13 that winds the tow line. When the melted solid body 7 is suspended, the pulling part of the tow line 5 is pulled in to reduce the diameter of the annular part of the tow line and melt and solidify. The body is lifted by the hanger 8 so that the body does not fall from the hole of the end of the towline 5. At this time, the load of the molten solidified body 7 is supported by the tension of the plurality of tow ropes 5. The towline 5 needs to have strength to withstand the tension applied to the annular portion when the melted solid body 7 is suspended. In this embodiment, the wire rope is used, but a nylon rope or the like may be used.
[0020]
FIG. 2 is a conceptual diagram showing the types of springs used in this apparatus. In this embodiment, a coil spring as shown in FIG. 2A is used, but a strip-like plate spring as shown in FIG. 2B may be used, or FIG. A corrugated leaf spring as shown may be used. In the coil spring and the corrugated leaf spring, the length of the spring changes due to the expansion and contraction of the pitch of the spring, so that the spring does not protrude outward even when the tow line 5 is drawn. In the case of a strip spring, the spring will be bent outward when the pulling line 5 is drawn, but the lower end of the melt-solidified body 7 is rounded and there is a space between it and the cylindrical container. even overhang on the outside Nde strip spring wrinkles, never especially be a problem. The material of the spring is not particularly limited, but usually a highly elastic metal is used, and it is desirable that the diameter of the coil spring and the wave height or width of the corrugated leaf spring be 10 mm or less.
[0021]
FIG. 3 is a conceptual diagram showing an example of the shape of a locking member for pulling the tow rope used in the present apparatus. In the example of FIG. 3A, the connection terminal 14 is provided on one side surface of the locking member 11, and the through hole 15 that extends upward from the other side surface is provided. The towline 5 is pulled out from the drum as a handle part, passed through the through hole 15 on the upper surface of the locking member 11 to the side surface, and sequentially locked by a stopper at the lower end of the longitudinal cord to form a circular part, The tip is joined and fixed to the connection terminal 14 on the side surface of the locking member 11.
[0022]
In the example of FIG. 3 (b), one of the stoppers is a stopper that also serves as a locking member for a wheel stopper. That is, the stopper 3 attached to the lower end of the specific longitudinal cord 2 is also used as a ring stopper, and a hook 16 for connection is provided on one side surface of the stopper 3, and from the side surface on the opposite side. A through hole 15 is provided in the outer surface. A ring 17 is attached to the tip of the towline 5 and is locked to the connecting hook 16.
The tow rope 5 forms an annular portion from the connecting hook 16 to the through hole 15, and forms a handle portion by passing from the hole opposite to the hook of the through hole 15 to the outer hole. Since the ring 17 does not pass through the through hole 15, the ring 17 passes through the through hole 15 from the end fixed to the drum. In addition, after forming an annular part with a towline, the towline 5 may be fixed to the ring 17 and hung on the connecting hook 16.
[0023]
The pulling portion of the towline 5 extends upward along the longitudinal cord 2 and is moved up and down by a hoisting machine. Therefore, since the tow line 5 does not contact the surface of the molten solidified body, the molten solidified body is not damaged by the vertical movement of the towline 5.
3 (a) and 3 (b), the spring 4 is joined to both side surfaces of the locking member 11 or the stopper 3, and the entire circumference is connected in an annular shape, so the towline 5 is loosened. Sometimes the tip of the longitudinal cord 2 spreads outward and can move up and down around the molten solidified body.
[0024]
4A and 4B are diagrams of a melt-solidified body suspension device according to another embodiment of the present embodiment. FIG. 4A is a front view of the whole, and FIG. 4B is an enlarged view of a portion A in FIG. It is. In this apparatus, the shape of the flange 1, the arrangement of the longitudinal cable 2 and the transverse cable 9, the configuration of the hoisting machine 6, and the like are the same as those in the apparatus of FIG. However, this device differs from the device of FIG. 1 in that the towline 5 is routed inside the coil spring 4. That is, as shown in FIG. 4B, the coil spring 4 is joined to both side surfaces of the stopper 3 at the tip of the longitudinal cord 2, and the through hole 15 is formed in the stopper 3 at the position of the spring 4. The towline 5 passing through the spring 4 is also passed through the through hole 15. An annular portion is formed on the pulling rope 5 by a locking member 11 as shown in FIG. 3A, and the pulling portion is pulled upward and connected to the hoisting machine 6.
[0025]
In such a configuration, since the spring 4 and the towline 5 are united, the annular portion formed at the end of the longitudinal cord 2 responds faithfully to the tension and relaxation of the towline, and opens and closes reliably. Since 3 is also small, when the apparatus is put on the molten solidified body, the lower stopper or the like is less likely to come into contact with the molten solidified body, and the apparatus can be moved up and down more smoothly.
[0026]
FIG. 5 is a front view of a melt-solidified body suspension device which is still another aspect of the present embodiment. This device also has the same shape as the device shown in FIG. However, this device is different from the device of FIG. 1 in that the structure of the longitudinal cord 2 is different and that gravity is used instead of the spring.
A rigid material such as a copper round bar or a strip is used at the upper part of the longitudinal cord 2, and a chain 2 'is connected to the lower side as a bendable material. A stopper 3 is connected to the lower end of the chain 2 '. In this apparatus, a spring for connecting the stoppers is not provided. As with the device of FIG. 1, the towline 5 is locked to the stopper 3 so as to be movable in a direction perpendicular to the longitudinal cord 2, forms an annular portion in a round, and then the pulling portion is moved upward by the locking member 11. Has been drawn to. It is the same as that of the apparatus of FIG. 1 also that the pulling portion of the pulling rope 5 is moved up and down by the hoisting machine 6 so that the diameter of the annular portion is enlarged or reduced.
[0027]
According to the configuration of FIG. 5, the longitudinal cord 2 and the chain 2 ′ hang vertically due to the weight of the chain and the stopper. Therefore, in a state where the towline 5 is not drawn, the lower end of the longitudinal cord 2 is sufficiently opened and melted even if the distance between the longitudinal cords 2 is not expanded by special means such as elastic force of a spring. There is no particular obstacle to pulling it down around the solidified body. In the apparatus of FIG. 5, a link chain is used as the chain, but it may be a roller chain. The material is not necessarily limited to the chain, and may be any material that can be bent and hangs vertically by its own weight or the weight of the stopper. Further, it is sufficient that at least the lower part of the longitudinal cord 2 is bendable, and a bendable material such as a chain may be used over the entire length of the longitudinal cord 2.
[0028]
FIG. 6 is an explanatory diagram of an operation procedure for storing the melt-solidified body in a cylindrical container using the apparatus of the present embodiment. First, as shown in FIG. 6A, the apparatus is suspended by a crane or the like (not shown), and the longitudinal cord 2 is hung around the melted solid body 7. If the towline 5 is loosened at this time, the space between the longitudinal cords 2 is opened by the elastic force of the springs 4 and is suspended substantially vertically (even if the pulling amount of the towline 5 is adjusted so as not to open excessively). Therefore, the apparatus can be suspended without any trouble. As will be described later, it is preferable that the melt-solidified body 7 is placed on a table 18 having an appropriate diameter.
[0029]
After hanging down until the lower end of the vertical cord 2 is located below the bottom surface of the melt-solidified body 7, as shown in FIG. 6 (b), the towing line 5 is pulled by the hoisting machine 6, and the spring 4 (and the towing line 5). If the diameter of the annular portion is made smaller than the diameter of the melt-solidified body and held in a state where tension is applied to the towline 5, the lower end of the longitudinal cord 2 is drawn and becomes annular. Therefore, if it lifts with a crane etc. in this state, the end part of the longitudinal cord 2 connected to the ring will hit the bottom of the melt-solidified body 7, and the melt-solidified body can be lifted. Further, the molten and solidified body may be lifted up and transported to the position of the drum can as the storage container in this state.
[0030]
Next, as shown in FIG. 6C, after the melted and solidified body 7 is suspended until it reaches the bottom of the drum 19, the towline 5 is loosened as shown in FIG. When the gap between the lower ends of the longitudinal cords 2 is opened by force and the apparatus is lifted, the molten solidified body 7 is left behind and stored in the drum can 19. At this time, the longitudinal cord 2 and the stopper 3 at the lower end thereof move along the curved portion at the bottom of the melt-solidified body 7, so that the apparatus can be easily pulled up.
[0031]
The melted and solidified body 7 which is a suspended object of the present apparatus is obtained by dissolving and solidifying radioactive waste in a container (canister) having a predetermined shape. The melted and solidified body 7 has a constant curvature around the entire lower part of the cylindrical body. A curved portion is formed. A canister for storing in a 200 liter drum can has, for example, a body outer diameter of about 550 mm, a 90 R curved portion formed on the entire circumference of the bottom, and a portion having a diameter of about 370 mm in the center of the bottom surface is flat. .
Therefore, as shown in FIG. 6B, when the lower end of the longitudinal cord 2 is drawn, it is preferable that the stopper 3 is positioned at the curved portion. In this state, when the melted solid body 7 is suspended in the drum 19, the bottom of the melted solid body 7 lands first. Therefore, when the melted solid body 7 is placed on the floor and the towline 5 is slackened, the impact of falling Will not occur. Moreover, since the stopper 3 moves freely without being restricted by the molten solidified body and the floor surface when the towline 5 is loosened, the molten solidified body can be easily stored in the container.
[0032]
In order to correctly position the stopper 3 on the curved portion of the melt-solidified body, it is preferable to use a mounting base 18 as shown in FIG. If the diameter of the table 18 is set to be the same as or slightly larger than the diameter (about 370 mm) of the flat portion of the bottom surface of the melt-solidified body 7, the stopper 3 hits the table 18 when the towline 5 is drawn. In this state, the towline may be fixed and lifted.
Alternatively, a table similar to the table 18 shown in FIG. 6B may be prepared at the bottom of the container, and the melt-solidified body may be placed thereon.
[0033]
Since the melt-solidified body suspension device of the present invention is configured as described above, the diameter of the annular portion at the lower end of the longitudinal cord can be reduced and enlarged only by the operation of the towline. Therefore, the melted and solidified body can be suspended and the suspended state can be released as long as the vertical cord, the stopper, and the spring connecting them enter the gap between the melted and solidified body and the drum can. If the number of longitudinal cords is increased, the load applied to one of the longitudinal cords is reduced, and the diameter or thickness of the longitudinal cord can be reduced. Therefore, the diameter or thickness of the longitudinal cord, the stopper, the spring connecting the longitudinal cord, or the like is 10 mm. There is not much difficulty in making it less than about, and the goal of making the gap between the melt-solidified body and the drum can about 10 mm or less is sufficiently achieved.
[0034]
The apparatus of the present invention has a very simple structure, and does not require a large facility for overturning or tilting the molten solidified body and the drum can as in the method proposed in the above-mentioned patent document. Also, the work is only lifting and hanging by remote operation of the crane and the towline, and the work process is simpler than the method of the above-mentioned patent document.
It is not necessary to limit the object to be suspended and the storage container of the apparatus of the present invention to a melt-solidified body and a drum can, and various cylindrical bodies can be used to be stored in a container suitable for this. In addition, the object to be suspended does not necessarily need to be a cylindrical body, and various objects can be lifted and suspended by using vertical cords, stoppers, springs, etc. of structures and materials suitable for the cross-sectional shape and surface state. Can be done.
[0035]
Further, the structure, shape, etc. of each part of the apparatus of the present invention are not limited to those of the above embodiments. For example, the shapes of the flanges, stoppers, springs, towline locking members, etc. need not be limited to those of the embodiments. Further, the material, shape, arrangement, suspension method, and the like of the vertical cable and the horizontal cable need not be limited to those of this embodiment. As described above, it is not necessary to form the longitudinal cords of the same kind of material over the entire length. For example, a cylindrical hook-like structure combining longitudinal cords and transverse cords is provided below the flange. It may be a structure in which a large number of bendable longitudinal cords are suspended below the attachment. Alternatively, longitudinal cords and lateral cords may be formed in a net shape. Furthermore, the hoisting machine is not necessarily a combination of a motor and a drum. Any device can be used as long as it can move the towline up and down a predetermined distance and can maintain a tensioned state. For example, it can be driven by fluid pressure such as hydraulic pressure.
[0036]
In addition, in order to make it easier to lower the longitudinal cords around the melt-solidified body, the periphery of the flange from which the longitudinal cords are suspended can be enlarged and reduced in the radial direction. Also good.
In addition, when the melted solid is placed at a fixed position and the hoist is lifted by loosening the longitudinal cable, the roundness formed on the bottom edge of the molten solidified body is used to simplify the configuration of the device and reduce the cost. You may make it reduce. If the device is lifted by loosening the tip of the longitudinal cord, the diameter of the ring connecting the tip will be distorted by the rounded part of the melt-solidified body and naturally expands. By using this action instead of the spring, The device becomes simple.
[0037]
【The invention's effect】
The melted and solidified body suspension device of the present invention supports the solidified body by squeezing its mouth with a pulling rope that draws and squeezes the longitudinal cord and the tip thereof in an annular shape, so that the melted solid body is suspended and lifted. Even when the container is used, the melted and solidified body can be easily stored by remote control. The configuration of this apparatus is simple and compact, and does not require a large facility for overturning or tilting the melt-solidified body and the storage container as found in the conventional system.
[Brief description of the drawings]
FIG. 1 is a front view of a melt-solidified body suspension apparatus according to an embodiment of the present invention.
FIG. 2 is a conceptual diagram showing an example of types of springs used in the apparatus of the present embodiment.
FIG. 3 is a conceptual diagram showing an example of the shape of a locking member for a wheel stopper in the apparatus of the present embodiment.
FIG. 4 is a diagram of a melt-solidified body suspension device according to another aspect of the embodiment.
FIG. 5 is a front view of a melt-solidified body suspension device which is still another aspect of the embodiment.
FIG. 6 is an explanatory diagram of an operation procedure for storing a melt-solidified body in a cylindrical container by the apparatus of the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flange 2 Longitudinal cable 2 'Chain 3 Stopper 4 Spring 5 Towing line 6 Hoisting machine 7 Molten solidified body 8 Lifter 9 Horizontal cable 10 Notch groove 11 Locking member 12 Motor 13 Drum 14 Connection terminal 15 Through-hole 16 For connection Hook 17 Ring 18 Stand 19 Drum

Claims

A flange provided with a hanger, a plurality of equal-length longitudinal cords that are suspended at substantially equal intervals in the circumferential direction of the flange and can be bent at least at the lower part thereof, and the lower ends of the longitudinal cords are connected to each other And a driving device for pulling or loosening the towline, and pulling down the longitudinal cord around the melted solidified body to draw the tip of the longitudinal cord in an annular shape and melted the solidified body. A melt-solidified body suspension device that supports and lifts a solid.

A flange provided with a hanger, a plurality of equal-length longitudinal cords that are suspended at substantially equal intervals in the circumferential direction of the flange and can be bent at least at the lower part thereof, and attached to the lower ends of the longitudinal cords And a pulling line having a pulling part that forms an annular part that connects the tip of the longitudinal cord in an annular shape at a tip part of the pulling line that is locked to the stopper, and that enlarges or reduces the diameter of the annular part. A hoisting machine for moving the pulling part of the towline up and down, hanging the longitudinal cord around the melted solidified body that is the object to be suspended, and pulling up the pulling part of the towline by the hoisting machine, A melt-solidified body suspension device characterized in that the melt-solidified body can be suspended by drawing an annular portion.

The spring according to claim 2, wherein a spring for connecting the stopper in an annular shape is arranged so that the diameter of the annular portion of the longitudinal cord is expanded by the elastic force of the spring when the pulling rope is loosened. Melt-solidified body suspension device.

4. The melt-solidified body suspension device according to claim 3, wherein a coil spring having an inner diameter larger than that of the pulling rope is used as the spring, and the pulling rope is inserted into the coil spring in an annular shape.

The melt-solidified body suspension device according to any one of claims 2 to 4, wherein a transverse cord that connects adjacent longitudinal cords in a ring shape is disposed in the middle of the longitudinal cord.

The melt-solidified body according to any one of claims 1 to 5, wherein the melt-solidified body is a low-level radioactive waste melted and solidified in a canister, and is used to store the waste in a drum can. Hanging device.