JP2001166087A - Storage cask - Google Patents
Storage caskInfo
- Publication number
- JP2001166087A JP2001166087A JP34628099A JP34628099A JP2001166087A JP 2001166087 A JP2001166087 A JP 2001166087A JP 34628099 A JP34628099 A JP 34628099A JP 34628099 A JP34628099 A JP 34628099A JP 2001166087 A JP2001166087 A JP 2001166087A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- inner cylinder
- bottom plate
- forming member
- concrete
- 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.)
- Pending
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
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、原子力発電所など
で発生する使用済み燃料の保管に用いる貯蔵キャスクに
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage cask used for storing spent fuel generated in a nuclear power plant or the like.
【０００２】[0002]
【従来の技術】近年、原子力発電所などで発生する使用
済み燃料を、その崩壊熱が除去されるまでの間、図２に
示すような貯蔵キャスクを用いて乾式保管（風冷保管）
することが検討されている。2. Description of the Related Art Recently, spent fuel generated in a nuclear power plant or the like is dry-stored (wind-cooled storage) using a storage cask as shown in FIG. 2 until its decay heat is removed.
It is considered to be.
【０００３】この貯蔵キャスクは、使用済み燃料を封入
したキャニスタ１が上方から内部へ挿入され得る鉄筋コ
ンクリート構造のキャスク本体２と、該キャスク本体２
の上端開口部に嵌入され得る蓋体３とを備えている。This storage cask comprises a cascade body 2 having a reinforced concrete structure into which a canister 1 in which spent fuel is sealed can be inserted from above, and a cask body 2
And a lid 3 that can be fitted into the upper end opening of the main body.
【０００４】キャスク本体２には、底面からキャニスタ
１が挿入される収納空間４へ貫通する底部空間５と、外
周面下部から底部空間５の下部へ連通する複数の吸気流
路６と、収納空間４の上部近傍から外周面上部近傍へ貫
通する複数の排気流路７とが形成されている。The cask body 2 has a bottom space 5 penetrating from the bottom surface to a storage space 4 into which the canister 1 is inserted, a plurality of intake passages 6 communicating from a lower portion of the outer peripheral surface to a lower portion of the bottom space 5, a storage space. A plurality of exhaust passages 7 are formed to penetrate from the vicinity of the upper part 4 to the vicinity of the upper part of the outer peripheral surface.
【０００５】このうち、排気流路７は、放射線がキャス
ク本体２の内方から排気流路７を経て直線的に外方へ放
出されることを防止するために、流路形状が屈曲した構
造になっている。The exhaust passage 7 has a curved passage shape in order to prevent radiation from being emitted linearly from inside the cask main body 2 through the exhaust passage 7 to the outside. It has become.
【０００６】キャスク本体２の内周面には、炭素鋼ある
いはステンレス鋼よりなるライナ８が、キャニスタ１を
周方向に取り囲み且つ該キャニスタ１の外周面との間に
空隙が形成されるように設けられている。A liner 8 made of carbon steel or stainless steel is provided on the inner peripheral surface of the cask main body 2 so as to surround the canister 1 in the circumferential direction and to form a gap between the canister 1 and the outer peripheral surface thereof. Have been.
【０００７】キャスク本体２の内底面には、複数の載置
台９が、底部空間５を中心として放射状に且つキャニス
タ１の底面に当接し得るように設けられており、収納空
間４に挿入したキャニスタ１の底面とキャスク本体２の
内底面との間に空隙が形成されるようになっている。A plurality of mounting tables 9 are provided on the inner bottom surface of the cask main body 2 so as to radially center on the bottom space 5 and contact the bottom surface of the canister 1. A gap is formed between the bottom surface of the main body 1 and the inner bottom surface of the cask main body 2.
【０００８】キャスク本体２の上部には、炭素鋼あるい
はステンレス鋼よりなる環状の支持座１０が、収納空間
４に同軸に且つキャスク本体２に内接するように一体的
に設けられている。An annular support seat 10 made of carbon steel or stainless steel is integrally provided on the upper portion of the cask main body 2 so as to be coaxial with the storage space 4 and inscribed in the cask main body 2.
【０００９】蓋体３は、炭素鋼あるいはステンレス鋼よ
りなり且つ支持座１０の上面にボルト締結されるフラン
ジ部１１と、該フランジ部１１の下面に一体的に設けら
れ且つ支持座１０に嵌入され得る鉄筋コンクリート構造
のプラグ部１２とで構成されている。The lid 3 is made of carbon steel or stainless steel, and is provided with a flange portion 11 which is bolted to the upper surface of the support seat 10, and is provided integrally with the lower surface of the flange portion 11 and fitted into the support seat 10. And a plug portion 12 having a reinforced concrete structure to be obtained.
【００１０】図２に示す貯蔵キャスクによって使用済み
燃料を保管する際には、保管施設内に定置したキャスク
本体２の収納空間４に、使用済み燃料が外気に触れない
ように封入されているキャニスタ１を挿入し、また、蓋
体３のプラグ部１２を支持座１０に嵌入したうえ、該支
持座１０にフランジ部１１をボルト締結して、キャニス
タ１内の使用済み燃料から放出される放射線を、キャス
ク本体２と蓋体３とで遮蔽する。When the spent fuel is stored in the storage cask shown in FIG. 2, the canister is sealed in the storage space 4 of the cask main body 2 fixed in the storage facility so that the spent fuel does not come into contact with the outside air. 1 and the plug portion 12 of the lid 3 is inserted into the support seat 10, and the flange portion 11 is bolted to the support seat 10 so that radiation emitted from the spent fuel in the canister 1 is released. , And are shielded by the cask main body 2 and the lid 3.
【００１１】次いで、キャニスタ１に封入されている使
用済み燃料の崩壊熱で収納空間４内の空気が温められる
と、収納空間４から排気流路７を経てキャスク本体２の
外部へ流出する空気流Ａと、キャスク本体２の外部から
吸気流路６、底部空間５を経て収納空間４へ流入する空
気流Ｂとが生じ、収納空間４を連続的に流通する空気に
よって、キャニスタ１内の使用済み燃料が冷却される。Next, when the air in the storage space 4 is heated by the decay heat of the spent fuel sealed in the canister 1, the air flow flowing out of the storage space 4 to the outside of the cask body 2 through the exhaust passage 7. A and an air flow B flowing into the storage space 4 from the outside of the cask body 2 through the intake passage 6 and the bottom space 5 are generated, and the air continuously flowing through the storage space 4 causes the used space in the canister 1 to be used. The fuel is cooled.
【００１２】[0012]
【発明が解決しようとする課題】ところが、図２に示す
貯蔵キャスクでは、キャスク本体２の鉄筋コンクリート
躯体が露出しているため、地震などによって落下物がキ
ャスク本体２に衝突した場合や、あるいは、長期間にわ
たる保管によって、コンクリートが空気中の二酸化炭素
の作用で中性化した場合には、キャスク本体２の表層部
分に剥離、欠落が生じて、放射線の遮蔽性能が低減する
ことが懸念される。However, in the storage cask shown in FIG. 2, since the reinforced concrete skeleton of the cask main body 2 is exposed, a falling object collides with the cask main body 2 due to an earthquake or the like. If the concrete is neutralized by the action of carbon dioxide in the air due to storage for a period, there is a concern that the surface layer of the cask main body 2 may be peeled off or missing, resulting in reduced radiation shielding performance.
【００１３】また、キャスク本体２の製作にあたって
は、鉄筋の配筋作業及び結束作業、型枠設置作業、コン
クリート打設作業、型枠撤去作業を順に行なうので、キ
ャスク本体２を効率よく製作できない。Further, in manufacturing the cask main body 2, since the reinforcing bar arranging operation, the binding operation, the form setting operation, the concrete placing operation, and the form removing operation are sequentially performed, the cask main body 2 cannot be manufactured efficiently.
【００１４】本発明は上述した実情に鑑みてなしたもの
で、製作が容易で且つコンクリートの剥離や欠落を防止
可能な貯蔵キャスクを提供することを目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a storage cask which is easy to manufacture and can prevent peeling or falling off of concrete.
【００１５】[0015]
【課題を解決するための手段】上記目的を達成するた
め、本発明の請求項１に記載の貯蔵キャスクでは、使用
済み燃料を封入したキャニスタが上方から挿入され得る
内筒と、外縁部分が内筒の下端全周に連なる内底板と、
内筒を周方向に取り囲み且つ下端部が内筒下端部よりも
下側に位置する外筒と、外縁部分が外筒の下端全周に連
なる外底板と、外縁部分が外筒の上端全周に連なり且つ
内縁部分が内筒の上端全周に連なる頂板と、内筒の上端
部に嵌入され得る蓋体とを備え、内筒、内底板、外筒、
外底板、頂板によって囲まれる空間内に、コンクリート
遮蔽材を充填している。In order to achieve the above object, in the storage cask according to the first aspect of the present invention, an inner cylinder into which a canister filled with spent fuel can be inserted from above and an outer edge portion have an inner portion. An inner bottom plate extending all around the lower end of the cylinder,
An outer cylinder surrounding the inner cylinder in the circumferential direction and having a lower end positioned below the lower end of the inner cylinder; an outer bottom plate having an outer edge portion connected to the entire lower end of the outer cylinder; and an outer edge portion extending entirely around the upper end of the outer cylinder. A top plate, the inner edge of which is continuous with the entire circumference of the upper end of the inner cylinder, and a lid body that can be fitted into the upper end of the inner cylinder, the inner cylinder, the inner bottom plate, the outer cylinder,
The space surrounded by the outer bottom plate and the top plate is filled with a concrete shielding material.
【００１６】本発明の請求項２に記載の貯蔵キャスクで
は、使用済み燃料を封入したキャニスタが上方から挿入
され得る内筒と、外縁部分が内筒の下端全周に連なり且
つ中央に上下に貫通する開口を穿設した内底板と、内筒
を周方向に取り囲み且つ下端部が内筒下端部よりも下側
に位置する外筒と、外縁部分が外筒の下端全周に連なり
且つ中央に上下に貫通する開口を穿設した外底板と、外
底板及び内底板の双方の内縁全周に連なる底部空間形成
部材と、外縁部分が外筒の上端全周に連なり且つ内縁部
分が内筒の上端全周に連なる頂板と、外筒外方から底部
空間形成部材内方へ向かって外筒及び底部空間形成部材
の下端部を貫通する吸気流路形成部材と、内筒内方から
外筒外方へ向かって内筒及び外筒の上部を貫通する排気
流路形成部材と、内筒の上端部に嵌入され得る蓋体とを
備え、内筒、内底板、外筒、外底板、底部空間形成部
材、頂板、吸気流路形成部材、排気流路形成部材によっ
て囲まれる空間内に、コンクリート遮蔽材を充填してい
る。In the storage cask according to the second aspect of the present invention, the inner cylinder into which the canister filled with the spent fuel can be inserted from above, and the outer edge portion is continuous with the entire lower end of the inner cylinder and penetrates vertically through the center. An inner bottom plate having an opening formed therein, an outer cylinder surrounding the inner cylinder in the circumferential direction and having a lower end positioned below the lower end of the inner cylinder, and an outer edge portion extending continuously around the lower end of the outer cylinder and in the center. An outer bottom plate having an opening penetrating vertically, a bottom space forming member connected to the entire inner periphery of both the outer bottom plate and the inner bottom plate, an outer edge portion connected to the entire upper end of the outer cylinder, and the inner edge portion of the inner cylinder. A top plate connected to the entire periphery of the upper end, an intake passage forming member penetrating the lower end of the outer cylinder and the bottom space forming member from the outside of the outer cylinder toward the inside of the bottom space forming member, and An exhaust flow path forming member that penetrates upward through the upper part of the inner cylinder and the outer cylinder, A lid that can be fitted into the upper end of the cylinder, and an inner cylinder, an inner bottom plate, an outer cylinder, an outer bottom plate, a bottom space forming member, a top plate, an intake passage forming member, and an exhaust passage forming member. Filled with concrete shielding material.
【００１７】本発明の請求項３に記載の貯蔵キャスクで
は、本発明の請求項１あるいは請求項２のいずれかに記
載の貯蔵キャスクの構成に加えて、蓋体を中空状に形成
し、当該蓋体内に、コンクリート遮蔽材を充填してい
る。In the storage cask according to a third aspect of the present invention, in addition to the structure of the storage cask according to the first or second aspect of the present invention, a lid is formed in a hollow shape. The lid is filled with a concrete shielding material.
【００１８】本発明の請求項１乃至請求項３に記載の貯
蔵キャスクのいずれにおいても、コンクリート遮蔽材
を、内筒、内底板、外筒、外底板、頂板で被覆し、地震
などによる落下物の衝突や、あるいは、空気中の二酸化
炭素によるコンクリートの中性化に起因したコンクリー
ト遮蔽材の表層部分の剥離、欠落を防止する。In any of the storage casks according to the first to third aspects of the present invention, the concrete shielding material is covered with an inner cylinder, an inner bottom plate, an outer cylinder, an outer bottom plate, and a top plate, and a fallen object caused by an earthquake or the like. This prevents the surface layer of the concrete shielding material from peeling off or falling off due to collision of the concrete or carbonation of the concrete due to carbon dioxide in the air.
【００１９】また、内筒、内底板、外筒、外底板、頂板
で囲まれる空間内にコンクリート遮蔽材を充填すること
により、鉄筋の配筋作業及び結束作業、型枠設置作業、
コンクリート打設作業、型枠撤去作業を省略する。Further, by filling the space surrounded by the inner cylinder, the inner bottom plate, the outer cylinder, the outer bottom plate, and the top plate with a concrete shielding material, a reinforcing bar arranging operation, a binding operation, a form setting operation,
Omission of concrete placing work and formwork removal work.
【００２０】本発明の請求項２に記載の貯蔵キャスクに
おいては、外筒外方から内筒内方への空気流入経路の内
側面を吸気流路形成部材により被覆し、内筒内方から外
筒外方への空気流出経路の内側面を排気流路形成部材に
より被覆して、空気中の二酸化炭素によるコンクリート
の中性化に起因したコンクリート遮蔽材の表層部分の剥
離、欠落を防止する。[0020] In the storage cask according to the second aspect of the present invention, the inner surface of the air inflow path from the outside of the outer cylinder to the inside of the inner cylinder is covered with the intake flow path forming member, and the inside of the inner cylinder is outside. The inner surface of the air outflow path to the outside of the cylinder is covered with an exhaust flow path forming member to prevent the surface layer portion of the concrete shielding material from peeling or missing due to carbonation of concrete due to carbon dioxide in the air.
【００２１】本発明の請求項３に記載の貯蔵キャスクに
おいては、コンクリート遮蔽材を、中空状の蓋体で被覆
し、地震などによる落下物の衝突や、あるいは、空気中
の二酸化炭素によるコンクリートの中性化に起因したコ
ンクリート遮蔽材の表層部分の剥離、欠落を防止する。In the storage cask according to the third aspect of the present invention, the concrete shielding material is covered with a hollow lid so as to collide with a falling object due to an earthquake or the like or to reduce the volume of concrete caused by carbon dioxide in the air. Prevents peeling and missing of the surface layer of concrete shielding material due to carbonation.
【００２２】また、中空状の蓋体内にコンクリート遮蔽
材を充填することにより、鉄筋の配筋作業及び結束作
業、型枠設置作業、コンクリート打設作業、型枠撤去作
業を省略する。By filling the hollow cover with a concrete shielding material, the work of arranging and binding reinforcing bars, the work of installing a formwork, the work of placing concrete, and the work of removing the formwork are omitted.
【００２３】[0023]
【発明の実施の形態】以下、本発明の実施の形態を、図
示例とともに説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００２４】図１は本発明の貯蔵キャスクの実施の形態
の一例であり、図中、図２と同一の符号を付した部分は
同一物を表わしている。FIG. 1 shows an example of an embodiment of a storage cask according to the present invention. In the drawing, the portions denoted by the same reference numerals as those in FIG. 2 represent the same items.
【００２５】この貯蔵キャスクは、使用済み燃料を封入
したキャニスタ１が上方から内部へ挿入され得るキャス
ク本体１４と、該キャスク本体１４の上端開口部に嵌入
され得る蓋体１５とを備えている。The storage cask includes a cask main body 14 into which the canister 1 containing the used fuel can be inserted from above, and a lid 15 that can be fitted into the upper end opening of the cask main body 14.
【００２６】キャスク本体１４は、キャニスタ１の外周
面との間に空隙が形成されるように該キャニスタ１を周
方向に取り囲む内筒１６と、外縁部分が内筒１６の下端
全周に連なり且つ中央に上下に貫通する開口が穿設され
た環状の内底板１７と、内筒１６を周方向に取り囲む外
筒１８と、外縁部分が外筒１８の下端全周に連なり且つ
中央に上下に貫通する開口が穿設された環状の外底板１
９と、内底板１７及び外底板１９の内縁全周に上下の端
部が連なる短筒状の底部空間形成部材２０と、外縁部分
が外筒１８の上端全周に連なり且つ内縁部分が内筒１６
の上端全周に連なる環状の頂板２１と、外筒１８外方か
ら底部空間形成部材２０内方へ向かって外筒１８及び底
部空間形成部材２０の下端部を貫通する吸気流路形成部
材２２と、内筒１６内方から外筒１８外方へ向かって内
筒１６及び外筒１８の上部近傍を貫通する排気流路形成
部材２３とによって一体的に構成されており、内筒１６
の内周面と内底板１７の上面とで、収納空間４を形成し
ている。The cask body 14 has an inner cylinder 16 surrounding the canister 1 in the circumferential direction so that a gap is formed between the cask main body 14 and the outer peripheral surface of the canister 1, and an outer edge portion is continuous with the entire lower end of the inner cylinder 16. An annular inner bottom plate 17 having an opening penetrating vertically in the center, an outer cylinder 18 surrounding the inner cylinder 16 in the circumferential direction, and an outer edge portion extending continuously around the lower end of the outer cylinder 18 and vertically penetrating the center. Annular outer bottom plate 1 with a perforated opening
9, a short cylindrical bottom space forming member 20 whose upper and lower ends are continuous with the entire inner periphery of the inner bottom plate 17 and the outer bottom plate 19, an outer peripheral portion is connected to the entire upper end of the outer cylindrical member 18, and the inner peripheral portion is the inner cylindrical member. 16
An annular top plate 21 connected to the entire periphery of the upper end of the outer cylinder 18, and an intake flow path forming member 22 penetrating the lower end of the outer cylinder 18 and the bottom space forming member 20 from the outside of the outer cylinder 18 toward the inside of the bottom space forming member 20. And an exhaust passage forming member 23 penetrating the inner cylinder 16 and the upper part of the outer cylinder 18 from the inner cylinder 16 to the outer cylinder 18 outward.
And the upper surface of the inner bottom plate 17 form the storage space 4.
【００２７】上記の内筒１６、内底板１７、外筒１８、
外底板１９、底部空間形成部材２０、頂板２１、吸気流
路形成部材２２、排気流路形成部材２３の素材には、炭
素鋼、あるいはステンレス鋼を用いている。The above-mentioned inner cylinder 16, inner bottom plate 17, outer cylinder 18,
Carbon steel or stainless steel is used as a material of the outer bottom plate 19, the bottom space forming member 20, the top plate 21, the intake passage forming member 22, and the exhaust passage forming member 23.
【００２８】吸気流路形成部材２２は、ウエブが上側に
位置し且つ左右のフランジが下方へ突出するように配置
した溝型部材であり、この吸気流路形成部材２２によっ
て、外筒１８の外方から底部空間形成部材２０内方の底
部空間５へ連通する吸気流路６を形成している。The intake channel forming member 22 is a groove-shaped member in which the web is located on the upper side and the left and right flanges project downward. The intake passage 6 is formed to communicate with the bottom space 5 inside the bottom space forming member 20 from the side.
【００２９】排気流路形成部材２３は、矩形流路断面を
有する中空構造体であり、この排気流路形成部材２３に
よって、収納空間４から外筒１８の外方へ連通する排気
流路７を形成している。The exhaust passage forming member 23 is a hollow structure having a rectangular passage cross section. The exhaust passage forming member 23 allows the exhaust passage 7 communicating from the storage space 4 to the outside of the outer cylinder 18. Has formed.
【００３０】排気流路形成部材２３の形状は、キャスク
本体１４内方から放射線が直線的に外方へ放出されるこ
とを防止するために、流路形状が中間部分で屈折してい
る。The shape of the exhaust flow path forming member 23 is such that the flow path shape is bent at an intermediate portion in order to prevent radiation from being emitted linearly outward from inside the cask body 14.
【００３１】内底板１７の上面には、複数の載置台９
が、底部空間５を中心として放射状に且つキャニスタ１
の底面に当接し得るように設けられている。On the upper surface of the inner bottom plate 17, a plurality of mounting tables 9 are provided.
Are radially centered on the bottom space 5 and the canister 1
Is provided so as to be able to come into contact with the bottom surface of the.
【００３２】キャスク本体１４の内部、すなわち、内筒
１６の外周面、内底板１７の下面、外筒１８の内周面、
外底板１９の上面、底部空間形成部材２０の外周面、並
びに頂板２１の下面で囲まれる空間には、生コンクリー
トが固化したコンクリート遮蔽材２４が充填されてい
る。The inside of the cask body 14, ie, the outer peripheral surface of the inner cylinder 16, the lower surface of the inner bottom plate 17, the inner peripheral surface of the outer cylinder 18,
The space surrounded by the upper surface of the outer bottom plate 19, the outer peripheral surface of the bottom space forming member 20, and the lower surface of the top plate 21 is filled with a concrete shielding material 24 made of solidified concrete.
【００３３】頂板２１には、キャスク本体１４の内部に
生コンクリートを充填するための孔２５と、生コンクリ
ートの充填に伴ってキャスク本体１４の内部の空気を外
部へ排出させるための孔２６とが穿設されている。The top plate 21 has a hole 25 for filling the inside of the cask body 14 with ready-mixed concrete, and a hole 26 for discharging the air inside the cask body 14 to the outside with the filling of the ready-mixed concrete. Has been drilled.
【００３４】上記の孔２５，２６は、生コンクリートが
固化した後に、孔２５，２６に嵌入され且つ頂板２１に
全周溶接した塞ぎ板２７，２８によって閉じられてい
る。After the ready-mixed concrete is solidified, the holes 25 and 26 are closed by closing plates 27 and 28 which are fitted into the holes 25 and 26 and are welded to the top plate 21 all around.
【００３５】また、頂板２１の上面内縁近傍部分には、
周方向に延びる凹陥部２９が形成されている。In the vicinity of the inner edge of the upper surface of the top plate 21,
A recess 29 extending in the circumferential direction is formed.
【００３６】蓋体１５は、凹陥部２９の上面にボルト締
結されるフランジ部３０と、該フランジ部３０の下面に
一体的に設けられ且つ内筒１６の上端部に嵌入され得る
中空状のプラグ部３１とで構成されている。The lid 15 has a flange portion 30 which is bolted to the upper surface of the concave portion 29, and a hollow plug which is integrally provided on the lower surface of the flange portion 30 and can be fitted into the upper end of the inner cylinder 16. And a unit 31.
【００３７】上記のフランジ部３０、プラグ部３１の素
材には、炭素鋼、あるいはステンレス鋼を用いている。The flange 30 and the plug 31 are made of carbon steel or stainless steel.
【００３８】プラグ部３１の内部には、生コンクリート
が固化したコンクリート遮蔽材３２が充填されている。The inside of the plug portion 31 is filled with a concrete shielding material 32 in which ready-mixed concrete is solidified.
【００３９】フランジ部３０には、プラグ部３１の内部
に生コンクリートを充填するための孔３３と、生コンク
リートの充填に伴ってプラグ部３１の内部の空気を外部
へ排出させるための孔３４とが穿設されている。The flange portion 30 has a hole 33 for filling the inside of the plug portion 31 with fresh concrete, and a hole 34 for discharging the air inside the plug portion 31 to the outside with the filling of the ready-mixed concrete. Are drilled.
【００４０】上記の孔３３，３４は、生コンクリートが
固化した後に、孔３３，３４に嵌入され且つフランジ部
３０に全周溶接した塞ぎ板３５，３６によって閉じられ
ている。After the ready-mixed concrete is solidified, the holes 33 and 34 are closed by closing plates 35 and 36 which are fitted into the holes 33 and 34 and welded to the flange portion 30 all around.
【００４１】図１に示す貯蔵キャスクによって使用済み
燃料を保管する際には、保管施設内に定置したキャスク
本体１４の収納空間４に使用済み燃料が外気に触れない
ように封入されているキャニスタ１を挿入し、また、蓋
体１５のプラグ部３１を内筒１６の上端部に嵌入したう
え、該内筒１６にフランジ部３０をボルト締結して、キ
ャニスタ１内の使用済み燃料から放出される放射線を、
キャスク本体１４と蓋体１５とで遮蔽する。When the spent fuel is stored in the storage cask shown in FIG. 1, the canister 1 in which the spent fuel is sealed in the storage space 4 of the cask body 14 fixed in the storage facility so as not to contact the outside air. In addition, the plug portion 31 of the lid 15 is inserted into the upper end of the inner cylinder 16, and the flange portion 30 is bolted to the inner cylinder 16 to be discharged from the spent fuel in the canister 1. Radiation,
It is shielded by the cask body 14 and the lid 15.
【００４２】次いで、キャニスタ１に封入されている使
用済み燃料の崩壊熱で収納空間４内の空気が温められる
と、収納空間４から排気流路７を経てキャスク本体１４
の外部へ流出する空気流Ａと、キャスク本体１４の外部
から吸気流路６、底部空間５を経て収納空間４へ流入す
る空気流Ｂとが生じ、収納空間４を連続的に流通する空
気によって、キャニスタ１内の使用済み燃料が冷却され
る。Next, when the air in the storage space 4 is heated by the decay heat of the spent fuel sealed in the canister 1, the cask body 14 passes from the storage space 4 through the exhaust passage 7.
And an air flow B flowing from outside the cask body 14 to the storage space 4 through the intake passage 6 and the bottom space 5, and the air flowing continuously through the storage space 4 The spent fuel in the canister 1 is cooled.
【００４３】これに加えて、キャスク本体１４を構成す
るコンクリート遮蔽材２４が、内筒１６、内底板１７、
外筒１８、外底板１９、底部空間形成部材２０、頂板２
１、吸気流路形成部材２２、排気流路形成部材２３で被
覆され、蓋体１５を構成するコンクリート遮蔽材３２
が、フランジ部３０、プラグ部３１で被覆されているの
で、地震などによる落下物の衝突や、あるいは、空気中
の二酸化炭素によるコンクリートの中性化に起因したコ
ンクリート遮蔽材２４，３２の表層部分の剥離、欠落を
防止することができ、放射線の遮蔽性能が低下しない。In addition, the concrete shielding material 24 constituting the cask main body 14 includes the inner cylinder 16, the inner bottom plate 17,
Outer cylinder 18, outer bottom plate 19, bottom space forming member 20, top plate 2
1. A concrete shielding material 32 which is covered with the intake flow path forming member 22 and the exhaust flow path forming member 23 and constitutes the lid 15
Are covered with the flange portion 30 and the plug portion 31, so that the surface layer portions of the concrete shielding members 24 and 32 caused by collision of falling objects due to an earthquake or the like, or carbonation of the concrete due to carbon dioxide in the air. Can be prevented from peeling off and the radiation shielding performance does not decrease.
【００４４】更に、内筒１６、内底板１７、外筒１８、
外底板１９、底部空間形成部材２０、頂板２１などの強
度部材で囲まれる空間内にコンクリート遮蔽材２４を充
填し、同様に、フランジ部３０、プラグ部３１の強度部
材で囲まれる空間内にコンクリート遮蔽材３２を充填し
て、鉄筋の配筋作業及び結束作業、型枠設置作業、コン
クリート打設作業、型枠撤去作業を省略するので、貯蔵
キャスクを効率よく製作できる。Further, the inner cylinder 16, the inner bottom plate 17, the outer cylinder 18,
The space surrounded by the strength members such as the outer bottom plate 19, the bottom space forming member 20, and the top plate 21 is filled with the concrete shielding material 24, and the concrete surrounded by the strength members of the flange portion 30 and the plug portion 31 is similarly filled with concrete. By filling the shielding material 32 and omitting the reinforcing bar arranging work, the bundling work, the formwork setting work, the concrete placing work, and the formwork removing work, the storage cask can be manufactured efficiently.
【００４５】なお、本発明の貯蔵キャスクは上述した実
施の形態のみに限定されるものではなく、本発明の要旨
を逸脱しない範囲において変更を加え得ることは勿論で
ある。It should be noted that the storage cask of the present invention is not limited to the above-described embodiment, but may be modified without departing from the spirit of the present invention.
【００４６】[0046]
【発明の効果】以上述べたように、本発明の貯蔵キャス
クによれば、下記のように種々の優れた効果を奏し得
る。As described above, according to the storage cask of the present invention, various excellent effects can be obtained as described below.
【００４７】（１）本発明の請求項１乃至請求項３に記
載の貯蔵キャスクのいずれにおいても、コンクリート遮
蔽材を、内筒、内底板、外筒、外底板、頂板で被覆し、
地震などによる落下物の衝突や、あるいは、空気中の二
酸化炭素によるコンクリートの中性化に起因したコンク
リート遮蔽材の表層部分の剥離、欠落を防止するので、
キャニスタを周方向に取り囲むコンクリート遮蔽材の放
射線の遮蔽性能が低下しない。(1) In any of the storage casks according to the first to third aspects of the present invention, the concrete shielding material is covered with an inner cylinder, an inner bottom plate, an outer cylinder, an outer bottom plate, and a top plate.
As it prevents the collision of falling objects due to an earthquake or the neutralization of concrete caused by carbon dioxide in the air, the surface layer of the concrete shielding material is prevented from peeling or missing.
The radiation shielding performance of the concrete shielding material surrounding the canister in the circumferential direction does not decrease.
【００４８】（２）また、内筒、内底板、外筒、外底
板、頂板で囲まれる空間内にコンクリート遮蔽材を充填
して、鉄筋の配筋作業及び結束作業、型枠設置作業、コ
ンクリート打設作業、型枠撤去作業を省略するので、貯
蔵キャスクを効率よく製作することができる。(2) The space surrounded by the inner cylinder, the inner bottom plate, the outer cylinder, the outer bottom plate, and the top plate is filled with a concrete shielding material, and the reinforcing bar reinforcing work and the binding work, the formwork setting work, the concrete setting work, and the like are performed. Since the casting operation and the mold removing operation are omitted, the storage cask can be manufactured efficiently.
【００４９】（３）本発明の請求項２に記載の貯蔵キャ
スクにおいては、外筒外方から内筒内方への空気流入経
路の内側面を吸気流路形成部材により被覆し、内筒内方
から外筒外方への空気流出経路の内側面を排気流路形成
部材により被覆して、空気中の二酸化炭素によるコンク
リートの中性化に起因したコンクリート遮蔽材の表層部
分の剥離、欠落を防止するので、キャニスタを周方向に
取り囲むコンクリート遮蔽材の空気流通部分の放射線の
遮蔽性能が低下しない。(3) In the storage cask according to the second aspect of the present invention, the inside surface of the air inflow path from the outside of the outer cylinder to the inside of the inner cylinder is covered with an intake passage forming member, and The inner surface of the air outflow path from the outside to the outside of the outer cylinder is covered with an exhaust flow path forming member to prevent the surface layer of the concrete shielding material from peeling or missing due to the carbonation of concrete due to carbon dioxide in the air. As a result, the radiation shielding performance of the air circulating portion of the concrete shielding material circumferentially surrounding the canister does not decrease.
【００５０】（４）本発明の請求項３に記載の貯蔵キャ
スクにおいては、コンクリート遮蔽材を、中空状の蓋体
で被覆し、地震などによる落下物の衝突や、あるいは、
空気中の二酸化炭素によるコンクリートの中性化に起因
したコンクリート遮蔽材の表層部分の剥離、欠落を防止
するので、キャニスタの直上に位置するコンクリート遮
蔽材の放射線の遮蔽性能が低下しない。(4) In the storage cask according to the third aspect of the present invention, the concrete shielding material is covered with a hollow lid so that a falling object collides due to an earthquake or the like.
Since the surface portion of the concrete shielding material is prevented from peeling off or missing due to carbonation of the concrete due to carbon dioxide in the air, the radiation shielding performance of the concrete shielding material located immediately above the canister does not decrease.
【００５１】（５）また、中空状の蓋体内にコンクリー
ト遮蔽材を充填して、鉄筋の配筋作業及び結束作業、型
枠設置作業、コンクリート打設作業、型枠撤去作業を省
略するので、貯蔵キャスクを効率よく製作することがで
きる。(5) The hollow lid is filled with a concrete shielding material, and the reinforcing bar arranging work, the binding work, the formwork setting work, the concrete placing work, and the formwork removing work are omitted. The storage cask can be manufactured efficiently.
【図１】本発明の貯蔵キャスクの実施の形態の一例を示
す部分切断構造図である。FIG. 1 is a partially cutaway structural view showing an example of an embodiment of a storage cask of the present invention.
【図２】近年提案されている貯蔵キャスクの一例を示す
部分切断構造図である。FIG. 2 is a partially cut structural view showing an example of a storage cask proposed in recent years.
１ キャニスタ １５ 蓋体 １６ 内筒 １７ 内底板 １８ 外筒 １９ 外底板 ２０ 底部空間形成部材 ２１ 頂板 ２２ 吸気流路形成部材 ２３ 排気流路形成部材 ２４ コンクリート遮蔽材 ３２ コンクリート遮蔽材 DESCRIPTION OF SYMBOLS 1 Canister 15 Lid 16 Inner cylinder 17 Inner bottom plate 18 Outer cylinder 19 Outer bottom plate 20 Bottom space forming member 21 Top plate 22 Intake flow path forming member 23 Exhaust flow path forming member 24 Concrete shielding material 32 Concrete shielding material
Claims (3)
方から挿入され得る内筒と、外縁部分が内筒の下端全周
に連なる内底板と、内筒を周方向に取り囲み且つ下端部
が内筒下端部よりも下側に位置する外筒と、外縁部分が
外筒の下端全周に連なる外底板と、外縁部分が外筒の上
端全周に連なり且つ内縁部分が内筒の上端全周に連なる
頂板と、内筒の上端部に嵌入され得る蓋体とを備え、内
筒、内底板、外筒、外底板、頂板によって囲まれる空間
内に、コンクリート遮蔽材を充填したことを特徴とする
貯蔵キャスク。1. An inner cylinder into which a canister filled with spent fuel can be inserted from above, an inner bottom plate having an outer edge portion extending all around the lower end of the inner cylinder, and an inner cylinder surrounding the inner cylinder in a circumferential direction and having a lower end portion formed in the inner cylinder. An outer cylinder located below the lower end, an outer bottom plate in which the outer edge part is continuous with the entire lower end of the outer cylinder, and an outer edge part is connected with the entire upper end of the outer cylinder, and the inner edge part is in the entire upper end of the inner cylinder. A continuous top plate and a lid that can be fitted into the upper end of the inner cylinder are provided, and a concrete shielding material is filled in a space surrounded by the inner cylinder, the inner bottom plate, the outer cylinder, the outer bottom plate, and the top plate. Storage cask.
方から挿入され得る内筒と、外縁部分が内筒の下端全周
に連なり且つ中央に上下に貫通する開口を穿設した内底
板と、内筒を周方向に取り囲み且つ下端部が内筒下端部
よりも下側に位置する外筒と、外縁部分が外筒の下端全
周に連なり且つ中央に上下に貫通する開口を穿設した外
底板と、外底板及び内底板の双方の内縁全周に連なる底
部空間形成部材と、外縁部分が外筒の上端全周に連なり
且つ内縁部分が内筒の上端全周に連なる頂板と、外筒外
方から底部空間形成部材内方へ向かって外筒及び底部空
間形成部材の下端部を貫通する吸気流路形成部材と、内
筒内方から外筒外方へ向かって内筒及び外筒の上部を貫
通する排気流路形成部材と、内筒の上端部に嵌入され得
る蓋体とを備え、内筒、内底板、外筒、外底板、底部空
間形成部材、頂板、吸気流路形成部材、排気流路形成部
材によって囲まれる空間内に、コンクリート遮蔽材を充
填したことを特徴とする貯蔵キャスク。2. An inner cylinder into which a canister filled with spent fuel can be inserted from above, an inner bottom plate having an outer edge portion connected to the entire periphery of the lower end of the inner cylinder and having an opening vertically penetrating the center thereof. An outer cylinder surrounding the cylinder in the circumferential direction and having a lower end positioned below the lower end of the inner cylinder; and an outer bottom plate having an outer edge portion connected to the entire circumference of the lower end of the outer cylinder and having an opening vertically penetrated in the center. A bottom space forming member connected to the entire inner periphery of both the outer bottom plate and the inner bottom plate; a top plate connected to the entire periphery of the upper end of the outer cylinder and the outer edge portion connected to the entire upper periphery of the inner cylinder; An intake flow path forming member penetrating through the lower end of the outer cylinder and the bottom space forming member from the inside toward the bottom space forming member, and upper portions of the inner cylinder and the outer cylinder from the inside of the inner cylinder to the outside of the outer cylinder. An exhaust passage forming member that penetrates the inner cylinder, and a lid that can be fitted into the upper end of the inner cylinder. A storage cask, wherein a concrete shielding material is filled in a space surrounded by a tube, an inner bottom plate, an outer tube, an outer bottom plate, a bottom space forming member, a top plate, an intake passage forming member, and an exhaust passage forming member.
コンクリート遮蔽材を充填した請求項１あるいは請求項
２のいずれかに記載の貯蔵キャスク。3. A lid body is formed in a hollow shape, and said lid body includes:
3. The storage cask according to claim 1, wherein the storage cask is filled with a concrete shielding material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34628099A JP2001166087A (en) | 1999-12-06 | 1999-12-06 | Storage cask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34628099A JP2001166087A (en) | 1999-12-06 | 1999-12-06 | Storage cask |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001166087A true JP2001166087A (en) | 2001-06-22 |
Family
ID=18382339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34628099A Pending JP2001166087A (en) | 1999-12-06 | 1999-12-06 | Storage cask |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001166087A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030064033A (en) * | 2002-01-25 | 2003-07-31 | 주식회사 시스텍 | The nuclear fuel waste container for nuclear power plant |
| US7351989B2 (en) | 2002-08-14 | 2008-04-01 | Mitsubishi Heavy Industries, Ltd. | Fiber-reinforced concrete cask, supporting frame for molding thereof and process for producing the concrete cask |
| RU2510721C1 (en) * | 2012-11-06 | 2014-04-10 | Федеральное Государственное унитарное предприятие "Российский Федеральный ядерный центр-Всероссийский научно-исследовательский институт экспериментальной физики-ФГУП "РФЯЦ-ВНИИЭФ" | Container for spent nuclear fuel transportation |
| RU2593273C1 (en) * | 2015-08-04 | 2016-08-10 | Федеральное государственное унитарное предприятие "Российский Федеральный ядерный центр - Всероссийский научно-исследовательский институт экспериментальной физики" (ФГУП "РФЯЦ-ВНИИЭФ") | Container for spent nuclear fuel transportation and storage |
| RU2611057C1 (en) * | 2016-03-02 | 2017-02-21 | Федеральное государственное унитарное предприятие "Российский Федеральный ядерный центр - Всероссийский научно-исследовательский институт экспериментальной физики" (ФГУП "РФЯЦ-ВНИИЭФ") | Container for storage and transportation of spent fuel assemblies and case for their arrangement |
| RU2700661C1 (en) * | 2018-03-23 | 2019-09-18 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") | Packing kit for transportation and/or storage of spent fuel assemblies |
| RU2727616C1 (en) * | 2019-10-01 | 2020-07-22 | Федеральное государственное унитарное предприятие "Российский Федеральный ядерный центр - Всероссийский научно-исследовательский институт экспериментальной физики" (ФГУП "РФЯЦ-ВНИИЭФ") | Shipping packaging set for transportation and storage of liquid spent nuclear fuel |
| RU2746959C1 (en) * | 2020-10-15 | 2021-04-22 | Федеральное государственное унитарное предприятие "Российский Федеральный ядерный центр - Всероссийский научно-исследовательский институт экспериментальной физики" (ФГУП "РФЯЦ-ВНИИЭФ") | Container for transportation and storage of spent nuclear fuel |
-
1999
- 1999-12-06 JP JP34628099A patent/JP2001166087A/en active Pending
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