JP2007085812A - Radioactive waste storage method, radioactive waste storing container and radioactive waste transportation container - Google Patents

Radioactive waste storage method, radioactive waste storing container and radioactive waste transportation container Download PDF

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JP2007085812A
JP2007085812A JP2005273216A JP2005273216A JP2007085812A JP 2007085812 A JP2007085812 A JP 2007085812A JP 2005273216 A JP2005273216 A JP 2005273216A JP 2005273216 A JP2005273216 A JP 2005273216A JP 2007085812 A JP2007085812 A JP 2007085812A
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radioactive waste
storage container
storage
disposal
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JP4954520B2 (en
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Ryutaro Wada
隆太郎 和田
Kenji Yamaguchi
憲治 山口
Tsutomu Nishimura
努 西村
Tomoaki Nakanishi
智明 中西
Keita Onishi
慶太 大西
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Kobe Steel Ltd
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    • 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
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Abstract

<P>PROBLEM TO BE SOLVED: To enhance transportation efficiency, when radioactive waste is transported to a disposal site, and enhance the efficiency of transportation work to the disposal site and disposal work in the disposal site, etc. <P>SOLUTION: In a pool 2 storing the radioactive waste 1, the radioactive waste 1 is stored in a storage container 3, ant then the storage container 3 is stored in a container for transportation 4 in the pool 2. In this state, water in the storage container 3 is drained through through-holes 10a, 11a to dry the interior of the storage container 3, and further water in the container for transportation 4 is drained through through-holes 12a, 13a to dry the interior of the container for transportation 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、原子力発電所等で発生する放射性廃棄物を処分場等で処分する技術に関する。   The present invention relates to a technique for disposing of radioactive waste generated at a nuclear power plant or the like at a disposal site or the like.

原子力発電所等の放射性廃棄物の発生場所においては、種々の低レベル放射性廃棄物が発生するが、このような放射性廃棄物のうち、外部線量率の高いものの多くは、まず、発電所等内に設けられたプールで純水に浸漬した状態で貯蔵される。尚、発電所においては原子炉プールやサイトバンカー等がこれに該当する。しかし、プールで貯蔵できる量にも限りがあるため、プールで貯蔵しきれない放射性廃棄物は、埋設処分用の処分容器に収納された状態で放射性廃棄物の処分場へ輸送されて、処分場内で地中埋設等の方法で処分されることになる。   Various radioactive wastes are generated at radioactive waste generation sites such as nuclear power plants, but most of these radioactive wastes with high external dose rate are first It is stored in a state where it is immersed in pure water in a pool provided in. In power plants, this includes reactor pools and site bunker. However, because the amount of water that can be stored in the pool is limited, radioactive waste that cannot be stored in the pool is transported to the radioactive waste disposal site in a state where it is stored in a disposal container for buried disposal. It will be disposed of by underground burial.

このように原子力発電所等から処分場へ放射性廃棄物を輸送して処分する方法としては、例えば、非特許文献１に記載されたようなものがある。この方法では、まず、原子力発電所等において、輸送用容器に直接放射性廃棄物を収納して、この輸送用容器を処分場へ輸送する。処分場においては、輸送用容器から放射性廃棄物を取り出して、圧縮工程あるいは焼却工程を経て放射性廃棄物の容積及び重量を減らしてから、この放射性廃棄物を処分容器に収納する。そして、セメントなどの内部充填材を処分容器内に充填して廃棄体を作製して、この廃棄体を地中に埋設する。   As such a method for transporting and disposing of radioactive waste from a nuclear power plant or the like to a disposal site, there is, for example, a method described in Non-Patent Document 1. In this method, first, radioactive waste is directly stored in a transport container at a nuclear power plant or the like, and the transport container is transported to a disposal site. In the disposal site, the radioactive waste is taken out from the transport container, and the volume and weight of the radioactive waste is reduced through the compression process or the incineration process, and then the radioactive waste is stored in the disposal container. Then, an internal filler such as cement is filled in the disposal container to produce a waste body, and this waste body is buried in the ground.

RENARD C, DECKERS J, "Centralising LLW treatment in Belgium. " Nucl Eng Int. VOL. 39 NO. 479; PAGE. 37-39; (1994/06)RENARD C, DECKERS J, "Centralising LLW treatment in Belgium." Nucl Eng Int. VOL. 39 NO. 479; PAGE. 37-39; (1994/06)

しかし、前記非特許文献１に記載されたような、原子力発電所等において、輸送用容器に直接放射性廃棄物を収納し、処分場において輸送用容器から放射性廃棄物を取り出して処分容器に収納する方法では、原子力発電所等において、プールから引き上げた放射性廃棄物の水抜きや乾燥等が行われないことから、輸送される放射性廃棄物の重量が大きくなり、一度に輸送できる量が少なくなってしまうため、輸送効率が低下する。また、汚染したプール水により汚染範囲が拡大してしまう懸念があるし、処分場へ予期しない放射性物質を持ち込むことにもなる。さらに、放射性廃棄物を直接輸送用容器に収納するため、輸送用容器も著しく汚染してしまう。そのため、除染作業に時間がかかるなど、処分場における作業効率が低下する。   However, in a nuclear power plant or the like as described in Non-Patent Document 1, radioactive waste is directly stored in a transport container, and the radioactive waste is taken out from the transport container at a disposal site and stored in a disposal container. In the method, since the radioactive waste lifted from the pool is not drained or dried at a nuclear power plant, the weight of the radioactive waste to be transported increases and the amount that can be transported at one time decreases. As a result, the transportation efficiency decreases. In addition, there is a concern that the contaminated area will be expanded by contaminated pool water, and unexpected radioactive materials will be brought to the disposal site. Furthermore, since the radioactive waste is directly stored in the transport container, the transport container is also significantly contaminated. For this reason, work efficiency at the disposal site decreases, for example, it takes time for decontamination work.

本発明の目的は、放射性廃棄物を処分場へ輸送する際の輸送効率を向上させること、処分場への輸送作業及び処分場における処分作業の作業効率を向上させること、等である。   An object of the present invention is to improve transport efficiency when transporting radioactive waste to a disposal site, improve work efficiency of transportation work to the disposal site, and disposal work at the disposal site.

課題を解決するための手段及び発明の効果Means for Solving the Problems and Effects of the Invention

第１の発明の放射性廃棄物の収納方法は、放射性廃棄物の発生場所において、放射性廃棄物を収納容器に収納してからこの収納容器を輸送用容器に収納する放射性廃棄物の収納方法であって、プール内の放射性廃棄物を前記収納容器に収納可能な形状に成形してから、前記プール内において放射性廃棄物を前記収納容器に収納する第１収納工程と、前記プール内において前記収納容器を前記輸送用容器に収納する第２収納工程と、前記収納容器を前記輸送用容器に収納した状態で、前記プール外において前記収納容器内の水と前記輸送用容器内の水を、前記収納容器と前記輸送用容器にそれぞれ設けられた水抜き穴を介して外部へ排出する水抜き工程とを備えたことを特徴とするものである。   The method for storing radioactive waste according to the first aspect of the present invention is a method for storing radioactive waste in which radioactive waste is stored in a storage container and then stored in a transport container at the location where the radioactive waste is generated. And forming the radioactive waste in the pool into a shape that can be stored in the storage container, and then storing the radioactive waste in the storage container in the pool; and the storage container in the pool And storing the water in the storage container and the water in the transport container outside the pool in a state in which the storage container is stored in the transport container. A water draining step for discharging to the outside through a water drain hole provided in each of the container and the transport container is provided.

収納容器を輸送用容器内に収納した後に、水抜き工程において、収納容器及び輸送容器内の水を水抜き穴から排出するため、放射性廃棄物を処分場へ輸送する際の輸送重量を確実に減らすことができ、輸送効率が向上する。また、汚染したプール水の漏洩・滴下により汚染範囲が拡大する懸念がなくなると共に、処分場へ予期しない放射性物質を持ち込むことがなくなる。また、プール内で収納容器に放射性廃棄物を収納してから、続けてプール内で収納容器を輸送用容器に収納し、さらに、その状態のまま、水抜き工程において収納容器及び輸送用容器内の水抜きを行うことができるので、収納作業及び水抜き作業を簡略化でき、作業効率を向上させることができる。   After storing the storage container in the transport container, the water in the storage container and the transport container is discharged from the drain hole in the draining process, so the transport weight when transporting radioactive waste to the disposal site is ensured. It can be reduced and transportation efficiency is improved. In addition, there is no concern that the contaminated area will expand due to leakage or dripping of contaminated pool water, and unexpected radioactive materials will not be brought into the disposal site. In addition, after storing radioactive waste in the storage container in the pool, the storage container is subsequently stored in the transport container in the pool, and further in that state, the storage container and the transport container Therefore, the storing operation and the draining operation can be simplified and the working efficiency can be improved.

さらに、放射性廃棄物を直接輸送用容器に収納せず、収納容器を介して輸送用容器に収納するため、放射性廃棄物に付着するクラッド等の汚染した腐食生成物の落下・散乱がなく、輸送用容器の放射能汚染を低減できる。   In addition, radioactive waste is not stored directly in the transport container, but is stored in the transport container via the storage container, so that there is no falling or scattering of contaminated corrosion products such as cladding adhering to the radioactive waste. The radioactive contamination of the container can be reduced.

第２の発明の放射性廃棄物の収納方法は、前記第１の発明において、前記水抜き工程後に、前記水抜き穴を介して収納容器内の水分を放出させて収納容器の内部を乾燥させる乾燥工程を備えたことを特徴とするものである。このように、収納容器内の水抜きを行った後に、さらに、乾燥工程において、貫通穴を介して収納容器内の水分を確実に放出させることで、収納容器内の放射性廃棄物を十分に乾燥させることができる。従って、内包した汚染プール水による周囲への汚染拡大や処分場への予期しない放射性物質の持ち込みがなくなる。また、放射性廃棄物を処分場へ輸送する際の輸送重量を確実に減らすことができるため、輸送効率がさらに向上する。   In the method for storing radioactive waste according to the second invention, in the first invention, after the draining step, moisture in the storage container is released through the drain hole to dry the inside of the storage container. It is characterized by comprising a process. In this way, after draining the storage container, the radioactive waste in the storage container is sufficiently dried by reliably releasing moisture in the storage container through the through hole in the drying step. Can be made. Accordingly, there is no expansion of contamination to the surrounding area due to the contaminated pool water contained therein, and the unexpected introduction of radioactive materials to the disposal site. Moreover, since the transport weight at the time of transporting radioactive waste to a disposal site can be reduced reliably, transport efficiency is further improved.

第３の発明の放射性廃棄物の収納方法は、前記第２の発明において、前記乾燥工程において、収納容器内に加熱空気を供給して収納容器の内部を乾燥させることを特徴とするものである。従って、供給された加熱空気により収納容器内の水分を蒸発させて水蒸気を水抜き穴から放出できるため、収納容器内の放射性廃棄物を十分に乾燥させることができる。   The method for storing radioactive waste according to the third invention is characterized in that, in the second invention, in the drying step, heated air is supplied into the storage container to dry the inside of the storage container. . Therefore, since the water in the storage container can be evaporated by the supplied heated air and the water vapor can be released from the drain hole, the radioactive waste in the storage container can be sufficiently dried.

第４の発明の放射性廃棄物の収納方法は、前記第２の発明において、前記乾燥工程において、真空ポンプを用いて収納容器の内部を乾燥させることを特徴とするものである。従って、真空ポンプを用いて収納容器内の空気を吸引して圧力を低下させることにより、収納容器内の水分を蒸発させて水蒸気を水抜き穴から放出できるため、収納容器内の放射性廃棄物を十分に乾燥させることができる。   According to a fourth aspect of the present invention, there is provided a method for storing radioactive waste, wherein, in the second aspect, in the drying step, the inside of the storage container is dried using a vacuum pump. Therefore, by sucking the air in the storage container using a vacuum pump and reducing the pressure, the water in the storage container can be evaporated and the water vapor can be released from the drain hole. It can be dried sufficiently.

第５の発明の放射性廃棄物の収納方法は、前記第２〜第４の何れかの発明において、前記水抜き工程において、前記収納容器が収納された前記輸送用容器をプールから引き上げた状態で放置してその水抜きを行うことを特徴とするものである。このように、収納容器をプールから引き上げた状態で放置するだけで、水抜き穴から収納容器内の水抜きを行うことができるため、水抜き作業が非常に容易になる。   In the method for storing radioactive waste according to the fifth invention, in any one of the second to fourth inventions, in the draining step, the transport container storing the storage container is pulled up from the pool. It is characterized in that it is left to drain the water. In this way, it is possible to drain the inside of the storage container from the drain hole simply by leaving the storage container in a state where the storage container is pulled up from the pool.

第６の発明の放射性廃棄物の収納方法は、前記第１〜第５の何れかの発明において、前記収納容器を収納した輸送用容器を放射性廃棄物の処分場へ輸送した後、輸送用容器から収納容器を取り出して、この収納容器を、その中から放射性廃棄物を取り出すことなく、処分場における埋設処分用の処分容器に収納することを特徴とするものである。このように、放射性廃棄物の収納時に表面が放射能で汚染された収納容器を、その中から放射性廃棄物を取り出すことなくそのまま処分容器内に収納するため、処分容器の表面が汚染されず、処分容器表面の除染を行うことなしに処分場において人手にて取り扱うことができ、作業効率が向上するし、処分場にそのための除染施設を設ける必要がない。また、作業員の被ばくを抑制することができる。さらに、放射性廃棄物を収納した収納容器を、強度、放射線の遮蔽性及び密閉性等を担保する処分容器に収納するため、埋設処分後に放射性廃棄物に包含される放射能が地中に容易に漏れ出すのを防止することができる。   According to a sixth aspect of the present invention, there is provided a method for storing radioactive waste according to any one of the first to fifth aspects of the present invention, after transporting a transport container storing the storage container to a radioactive waste disposal site. The storage container is taken out from the container, and the storage container is stored in a disposal container for burying disposal at a disposal site without taking out radioactive waste from the container. Thus, since the storage container whose surface is contaminated with radioactivity during storage of radioactive waste is stored in the disposal container as it is without taking out the radioactive waste from the inside, the surface of the disposal container is not contaminated, It can be handled manually at the disposal site without decontamination of the surface of the disposal container, work efficiency is improved, and there is no need to provide a decontamination facility for the disposal site. Moreover, the exposure of a worker can be suppressed. Furthermore, since the storage container storing the radioactive waste is stored in a disposal container that ensures strength, radiation shielding and sealing, etc., the radioactivity contained in the radioactive waste after the disposal is easily buried in the ground. Leakage can be prevented.

第７の発明の放射性廃棄物の収納容器は、プール内で放射性廃棄物が収納された状態で輸送用容器に収納される収納容器であって、その内部の水抜きを行う為の水抜き穴が設けられたことを特徴とするものである。このように、収納容器に水抜き穴が設けられているため、プール内で放射性廃棄物を収納容器に収納した後に、プール外において、収納容器内の水を容易に排出することができる。また、水抜き穴が設けられることによる収納容器の密閉性及び遮蔽性が低下する虞があるが、この収納容器は輸送用容器に収納されて処分場へ輸送されるため、収納容器の遮蔽性及び密閉性の低下分を輸送用容器により担保することができる。   A radioactive waste storage container according to a seventh aspect of the present invention is a storage container stored in a transport container in a state where the radioactive waste is stored in a pool, and a drain hole for draining water inside the storage container. Is provided. Thus, since the drainage hole is provided in the storage container, the water in the storage container can be easily discharged outside the pool after the radioactive waste is stored in the storage container in the pool. In addition, there is a possibility that the sealing and shielding properties of the storage container due to the provision of the drain hole may be reduced. However, since the storage container is stored in the transport container and transported to the disposal site, the shielding property of the storage container And the fall of a sealing property can be ensured with the container for transport.

第８の発明の放射性廃棄物の収納容器は、前記第７の発明において、容器本体とこの容器本体の上端部に接合される蓋部材とを有し、これら容器本体と蓋部材の双方に前記水抜き穴が夫々形成されていることを特徴とするものである。従って、収納容器内の水抜きの際には、容器本体に形成された水抜き穴から水を排出し、水抜き後にさらに収納容器内を乾燥させる場合には、収納容器内部で蒸発した水蒸気を蓋部材に形成された水抜き穴から放出することができる。   In the seventh invention, the radioactive waste storage container of the eighth invention has a container body and a lid member joined to the upper end portion of the container body, and both the container body and the lid member The drain holes are respectively formed. Therefore, when draining water from the storage container, water is drained from a drain hole formed in the container body, and when the interior of the storage container is further dried after draining, water vapor evaporated inside the storage container is removed. It can discharge | release from the drain hole formed in the cover member.

第９の発明の放射性廃棄物の輸送用容器は、放射性廃棄物をその発生場所から処分場に輸送するための輸送用容器であって、前記放射性廃棄物を収納した収納容器を収納でき、且つ、その内部の水抜きを行う為の水抜き穴が設けられたことを特徴とするものである。このように、輸送用容器に水抜き穴が設けられていると、プール内で収納容器を輸送用容器に収納した後に、プール外において、この輸送用容器内の水を容易に排出することができる。   The transport container for radioactive waste of the ninth invention is a transport container for transporting radioactive waste from the place where it is generated to a disposal site, and can store a storage container storing the radioactive waste, and The water drain hole for draining the inside is provided. As described above, if the transport container has a drain hole, the water in the transport container can be easily discharged outside the pool after the storage container is stored in the transport container in the pool. it can.

本発明の実施の形態について説明する。本実施形態は、原子力発電所で発生した放射性廃棄物を処分場に輸送して地中に埋設処分する場合に、本発明を適用した一例である。   Embodiments of the present invention will be described. This embodiment is an example to which the present invention is applied when radioactive waste generated at a nuclear power plant is transported to a disposal site and buried in the ground.

この実施形態においては、図１に示す工程に従って、図２〜図４に示すような収納容器３、輸送用容器４及び処分容器５を備えた放射性廃棄物１の処分用容器構造を用いて放射性廃棄物１を埋設処理する。即ち、放射性廃棄物１を直接収納するとともにプール作業時等の酸性化条件下での耐食性を担保する収納容器３、処分場へ輸送する際の放射線の遮蔽性、密閉性及び輸送中の外部からの衝撃等に対する強度を担保する輸送用容器４、そして、地中埋設処分後の、放射線の遮蔽性、密閉性、還元性条件下での耐食性及び処分場での外部からの荷重・衝撃等に対する強度を担保する処分容器５というように、３つの容器３〜５に夫々別々の機能を分担させて、処分場への輸送効率及び埋設処分の作業効率等を向上させるものである。   In this embodiment, in accordance with the process shown in FIG. 1, the radioactive waste 1 is used in the radioactive waste 1 disposal container structure including the storage container 3, the transport container 4 and the disposal container 5 as shown in FIGS. Waste 1 is buried. That is, the radioactive waste 1 is directly stored and the storage container 3 that ensures the corrosion resistance under the acidification conditions such as pool work, the shielding property of the radiation when transported to the disposal site, the sealing property, and the outside during transport Transport container 4 that guarantees strength against impacts, etc., and radiation shielding, sealing, corrosion resistance under reducing conditions, and external loads and impacts at disposal sites after underground disposal As in the case of the disposal container 5 that guarantees strength, the three containers 3 to 5 are assigned different functions to improve the transportation efficiency to the disposal site and the work efficiency of the buried disposal.

まず、放射性廃棄物１の収納、輸送及び埋設処分工程について、図１に従って概略説明する。まず、原子力発電所内のプール２内において、放射性廃棄物１を収納容器３（図２〜図４参照）に収納可能なサイズ及び形状に切断する工程を含む前処理を行った後、この放射性廃棄物１を収納容器３に収納する（第１収納工程）。次に、この収納容器３を、プール２内で、処分場へ輸送する為の輸送用容器４（図２、図３参照）に収納する（第２収納工程）。そして、収納容器３及び輸送用容器４内の水抜きを行い（水抜き工程）、さらに、収納容器３及び輸送用容器４の内部を乾燥させる（乾燥工程）。そして、発送前検査完了後、輸送用容器４を処分場へ輸送する。   First, the storing, transporting and burying disposal process of the radioactive waste 1 will be schematically described with reference to FIG. First, in the pool 2 in the nuclear power plant, after the pretreatment including the step of cutting the radioactive waste 1 into a size and shape that can be stored in the storage container 3 (see FIGS. 2 to 4), this radioactive waste is performed. The object 1 is stored in the storage container 3 (first storage step). Next, the storage container 3 is stored in a transport container 4 (see FIGS. 2 and 3) for transport to the disposal site in the pool 2 (second storage step). Then, the water in the storage container 3 and the transport container 4 is drained (water drain process), and the inside of the storage container 3 and the transport container 4 is dried (drying process). After the pre-shipment inspection is completed, the transport container 4 is transported to the disposal site.

一方、処分場においては、輸送用容器４から収納容器３を取り出して埋設処分用の処分容器５（図４参照）に収納し、内部充填材（モルタル等）の充填、蓋接合等の作業を行って廃棄体を作製し、この廃棄体を処分場の埋設ピットに埋設処分する。   On the other hand, at the disposal site, the storage container 3 is taken out from the transport container 4 and stored in the disposal container 5 for burying disposal (see FIG. 4). Go to make a waste, and bury this waste in the pit of the disposal site.

次に、図１に示す放射性廃棄物１の収納、輸送及び埋設処分の一連の工程に関し、特に、原子力発電所内における工程について詳細に説明する。
まず、放射性廃棄物１を収納容器３に収納する。図２、図４に示すように、収納容器３は、酸素ガスが存在する酸化性条件下で高耐食性材料であるステンレス鋼製で有底筒状の容器本体１０と、同じくステンレス鋼製で容器本体１０の上端部に接合される蓋部材１１とを有する。容器本体１０の下端部と蓋部材１１には、収納容器３内から水を排出する為の貫通穴１０ａ，１１ａ（水抜き穴）が夫々形成されている。そして、プール２内で、容器本体１０に放射性廃棄物１を収納した後に、容器本体１０に蓋部材１１をボルト、接続金具あるいは溶接等の種々の接合手段により接合する。 Next, the process in the nuclear power plant will be described in detail with respect to a series of processes for storing, transporting and burying the radioactive waste 1 shown in FIG.
First, the radioactive waste 1 is stored in the storage container 3. As shown in FIGS. 2 and 4, the storage container 3 is made of a stainless steel bottomed cylindrical container body 10 which is a highly corrosion-resistant material under an oxidizing condition in which oxygen gas is present, and is also made of stainless steel. And a lid member 11 joined to the upper end of the main body 10. Through holes 10 a and 11 a (drain holes) for discharging water from the inside of the storage container 3 are formed in the lower end portion of the container body 10 and the lid member 11. Then, after the radioactive waste 1 is stored in the container body 10 in the pool 2, the lid member 11 is joined to the container body 10 by various joining means such as bolts, connection fittings or welding.

このように、放射性廃棄物１を収納容器３内に収納してから、図２に示すように、輸送用容器４をプール２内に浸漬させる。この輸送用容器４は、鋼製の容器本体１２と、この容器本体１２の上端部に着脱可能に装着される蓋部材１３とを有する。尚、これら容器本体１２の下端部と蓋部材１３には、輸送用容器４内から水を排出する為の貫通穴１２ａ，１３ａ（水抜き穴）が夫々形成されている。そして、プール２内において、輸送用容器４の容器本体１２に収納容器３を収納した後、容器本体１２に蓋部材１３を装着する。   In this way, after the radioactive waste 1 is stored in the storage container 3, the transport container 4 is immersed in the pool 2 as shown in FIG. The transport container 4 includes a steel container body 12 and a lid member 13 that is detachably attached to the upper end portion of the container body 12. Note that through holes 12a and 13a (drain holes) for discharging water from the inside of the transport container 4 are formed in the lower end portion of the container body 12 and the lid member 13, respectively. In the pool 2, the storage container 3 is stored in the container main body 12 of the transport container 4, and then the lid member 13 is attached to the container main body 12.

ところで、収納容器３、輸送用容器４の肉厚等の寸法は、以下のようにして決定される。まず、輸送用容器４の外形寸法はすべて同一とし、どのような種類の放射性廃棄物１を輸送する場合も常に同じハンドリング用機器を用いて輸送用容器４を取り扱うことができるようにして、収納及び輸送作業の効率化を図る。   By the way, dimensions such as the thickness of the storage container 3 and the transport container 4 are determined as follows. First, the outer dimensions of the transport container 4 are all the same, and the transport container 4 can always be handled with the same handling equipment when transporting any type of radioactive waste 1. And improve the efficiency of transportation work.

そして、収納容器３に収容される放射性廃棄物１の線量当量率が高く、遮蔽厚さを大きくとる必要がある場合には、内容積の小さい収納容器３及び肉厚の厚い輸送用容器４を使用する。一方、放射性廃棄物１の線量当量率が低い場合には、遮蔽厚さを小さくできることから、肉厚の薄い輸送用容器４及び内容積の大きい収納容器３を採用して、収納容器３内に多量の放射性廃棄物１を収納できるようにして、輸送効率を高める。ここで、輸送用容器４の肉厚は、例えば、次のようにして決定される。即ち、Co-60のγ線を例にとると、線量当量率を１桁下げるために必要な遮蔽厚さは約60mmである。そして、線量当量率を２桁下げるのであれば120mm、３桁下げるのであれば180mmというように、線量当量率を１桁下げるごとに60mm刻みで遮蔽厚さを増やして輸送用容器４の肉厚を決定する。そして、この輸送用容器４の肉厚に応じて、収納容器３の寸法がほぼ一義的に決定される。   When the dose equivalent rate of the radioactive waste 1 stored in the storage container 3 is high and it is necessary to increase the shielding thickness, the storage container 3 having a small internal volume and the transport container 4 having a large thickness are provided. use. On the other hand, when the dose equivalent rate of the radioactive waste 1 is low, the shielding thickness can be reduced. Therefore, the transport container 4 with a small thickness and the storage container 3 with a large internal volume are adopted, A large amount of radioactive waste 1 can be stored to improve transportation efficiency. Here, the thickness of the transport container 4 is determined as follows, for example. In other words, taking Co-60 gamma rays as an example, the shielding thickness required to reduce the dose equivalent rate by one digit is about 60 mm. The thickness of the transport container 4 is increased by increasing the shielding thickness in increments of 60 mm each time the dose equivalent rate is lowered by 120 mm if the dose equivalent rate is lowered by 2 digits, such as 180 mm if lowered by 3 digits. To decide. The dimensions of the storage container 3 are determined almost uniquely according to the thickness of the transport container 4.

次に、図２、図３に示すように、水抜き工程において、プール２内で収納容器３を収容した輸送用容器４をプール２外まで引き上げてその状態のまま放置する。すると、収納容器３及び輸送用容器４の下端部に形成された貫通穴１０ａ，１２ａを介して、収納容器３及び輸送用容器４内の水が排出される。つまり、収納容器３を輸送用容器４に収納した状態で、放射性廃棄物１の水抜きが行われることになる。   Next, as shown in FIGS. 2 and 3, in the water draining process, the transport container 4 storing the storage container 3 in the pool 2 is pulled out of the pool 2 and left in that state. Then, the water in the storage container 3 and the transport container 4 is discharged through the through holes 10 a and 12 a formed in the lower ends of the storage container 3 and the transport container 4. In other words, the radioactive waste 1 is drained while the storage container 3 is stored in the transport container 4.

さらに、輸送用容器４の表面に付着したプール水を洗い流して表面の放射能を除去した後、乾燥工程において、輸送用容器４に乾燥用の加熱空気を供給する。図３に示すように、輸送用容器４に加熱空気供給装置２０を接続して加熱空気を供給するが、この加熱空気供給装置２０は、供給用空気を加熱するヒータ（図示略）とこのヒータで加熱された空気を輸送用容器４へ送り込むブロア（図示略）とを有する。そして、ヒータで加熱された加熱空気は、収納容器３及び輸送用容器４の下端部の貫通穴１０ａ，１２ａを介して収納容器３及び輸送用容器４内にブロアにより供給される。そして、この加熱空気により収納容器３及び輸送用容器４内の放射性廃棄物１及び空気が加熱されて内部の水分が蒸発し、水蒸気が収納容器３及び輸送用容器４の上端部の貫通穴１１ａ，１３ａを介して放出され、収納容器３及び輸送用容器４の内部が乾燥される。従って、放射性廃棄物１を確実に乾燥させて汚染されたプール水を排除し、かつ、その重量を減らすことができる。尚、この乾燥工程後、輸送用容器４の貫通穴１２ａ，１３ａはプラグ等により封止される。
この乾燥工程完了後、所定の発送前検査が行われて、輸送用容器４は処分場へ輸送される。 Further, after the pool water adhering to the surface of the transport container 4 is washed away to remove the radioactivity on the surface, heated air for drying is supplied to the transport container 4 in the drying step. As shown in FIG. 3, a heated air supply device 20 is connected to the transport container 4 to supply heated air. The heated air supply device 20 includes a heater (not shown) for heating the supply air and the heater. And a blower (not shown) for sending the air heated in step 4 to the transport container 4. The heated air heated by the heater is supplied by a blower into the storage container 3 and the transport container 4 through the through holes 10a and 12a at the lower ends of the storage container 3 and the transport container 4. And the radioactive waste 1 and air in the storage container 3 and the transport container 4 are heated by this heated air, the water | moisture content inside evaporates, and water vapor | steam is the through-hole 11a of the upper end part of the storage container 3 and the transport container 4 , 13a, and the inside of the storage container 3 and the transport container 4 is dried. Therefore, it is possible to reliably dry the radioactive waste 1 to eliminate the contaminated pool water and to reduce its weight. After this drying process, the through holes 12a and 13a of the transport container 4 are sealed with plugs or the like.
After this drying process is completed, a predetermined pre-shipment inspection is performed, and the transport container 4 is transported to a disposal site.

次に、処分場における廃棄体作製の工程について説明する。
図１に示すように、処分場においては、原子力発電所から輸送されてきた輸送用容器４から収納容器３を取り出し、この収納容器３を埋設処分用の処分容器５に収納する。ここで、図４に示すように、処分容器５は、炭素鋼製で有底筒状の容器本体１４と、同じく炭素鋼製で容器本体１４の上端部に接合される蓋部材１５とを有する。容器本体１４に蓋部材１５が接合された状態では、処分容器５は密閉構造となる。そのため、酸素ガス・溶存酸素のない還元性条件下での耐食性を有する炭素鋼により腐食開口までの長期寿命が期待でき、埋設処分後に放射性廃棄物に包含される放射能が地中に容易に漏れ出すのを防止することができる。還元性条件下での炭素鋼の腐食速度は中性条件下で０．０１ｍｍ／年以下、アルカリ性条件下で０．０００１ｍｍ／年程度と報告されており、腐食開口に至るまでには十分に長い寿命が期待できる。 Next, a process for producing a waste body at a disposal site will be described.
As shown in FIG. 1, in the disposal site, the storage container 3 is taken out from the transport container 4 that has been transported from the nuclear power plant, and this storage container 3 is stored in the disposal container 5 for buried disposal. Here, as shown in FIG. 4, the disposal container 5 has a bottomed cylindrical container body 14 made of carbon steel, and a lid member 15 that is also made of carbon steel and joined to the upper end of the container body 14. . In a state where the lid member 15 is joined to the container body 14, the disposal container 5 has a sealed structure. Therefore, the carbon steel that has corrosion resistance under reducing conditions without oxygen gas and dissolved oxygen can be expected to have a long life until the corrosion opening, and the radioactivity contained in the radioactive waste easily leaks into the ground after disposal. Can be prevented. The corrosion rate of carbon steel under reducing conditions is reported to be about 0.01 mm / year or less under neutral conditions and about 0.0001 mm / year under alkaline conditions, which is long enough to reach a corrosion opening. Life expectancy can be expected.

ここで、ステンレス鋼等の酸化性条件下での高耐食性材料で構成される収納容器３と、炭素鋼等の還元性条件下での耐食性材料で構成される処分容器５の間に、電気的な絶縁物が配置されていることが好ましい。この場合には、この電気的絶縁物により、金属間の電位差に起因する流電腐食（ガルバニック腐食）を防止することができる。これにより何らかの原因で収納容器３と処分容器５の間が電気伝導性の流体で満たされた場合でも容器の腐食速度の著しい増加を防止することができる。   Here, there is an electrical connection between the storage container 3 made of a highly corrosion resistant material under oxidizing conditions such as stainless steel and the disposal container 5 made of a corrosion resistant material under reducing conditions such as carbon steel. It is preferable that a simple insulator is disposed. In this case, the electrical insulator can prevent galvanic corrosion (galvanic corrosion) due to a potential difference between metals. Thereby, even when the space between the storage container 3 and the disposal container 5 is filled with an electrically conductive fluid for some reason, a significant increase in the corrosion rate of the container can be prevented.

また、この処分容器５は、地中に埋設された後に、長期間にわたり、土圧あるいは積み重ね荷重等の外力や外部からの衝撃等に耐えられる強度と、放射線の十分な遮蔽性を必要とするため、収納容器３の肉厚（例えば、肉厚１０ｍｍ）に比べて処分容器５の肉厚（例えば、５０ｍｍ）は十分に厚くなっている。   In addition, after being buried in the ground, the disposal container 5 needs to have a strength capable of withstanding external force such as earth pressure or stacking load, impact from the outside, and sufficient shielding against radiation for a long period of time. Therefore, the wall thickness (for example, 50 mm) of the disposal container 5 is sufficiently thicker than the wall thickness (for example, a wall thickness of 10 mm) of the storage container 3.

さらに、容器本体１４の内側部分と、蓋部材１５の内側（図４の下側）部分には、夫々放射線を遮蔽する為の遮蔽材１６，１７が予めボルト止め、焼きばめ等により取付られている。尚、外部からの衝撃等に対する強度や耐食性は収納容器３や処分容器５で担保されており、遮蔽材１６，１７には放射線を遮蔽する機能があれば十分であるため、遮蔽材１６，１７は、比較的安価な材料（例えば、ねずみ鋳鉄）で構成されている。但し、遮蔽材１６，１７には十分な放射線遮蔽機能が要求されるため、遮蔽材１６，１７の厚さは、処分容器５の肉厚（例えば、５０ｍｍ）と比較しても十分厚い（例えば、６０ｍｍ〜１２０ｍｍ）ものとなっている。このように、収納容器３と処分容器５の間に遮蔽材１６，１７が設けられているため、収納容器３が収納された処分容器５を地中に埋設する際の、作業員の被ばくを低減することができる。   Further, shielding members 16 and 17 for shielding radiation are attached to the inner part of the container main body 14 and the inner part (lower side in FIG. 4) of the lid member 15 by bolting, shrink fitting or the like in advance. ing. It should be noted that the strength and corrosion resistance against external impacts and the like are ensured by the storage container 3 and the disposal container 5, and the shielding materials 16 and 17 need only have a function of shielding radiation. Is made of a relatively inexpensive material (eg, gray cast iron). However, since the shielding materials 16 and 17 are required to have a sufficient radiation shielding function, the thickness of the shielding materials 16 and 17 is sufficiently thick compared to the thickness (for example, 50 mm) of the disposal container 5 (for example, , 60 mm to 120 mm). Thus, since the shielding materials 16 and 17 are provided between the storage container 3 and the disposal container 5, the exposure of the worker when the disposal container 5 in which the storage container 3 is stored is buried in the ground. Can be reduced.

または、遮蔽材１６，１７を設ける代わりに、前述したような、収納容器３内の放射性廃棄物の線量当量率に応じた輸送用容器４の肉厚決定と同じように、処分容器の肉厚を、放射線が十分に遮蔽されるような適切な厚さに設定するようにしてもよい。   Alternatively, instead of providing the shielding members 16 and 17, the thickness of the disposal container is the same as the thickness determination of the transport container 4 according to the dose equivalent rate of the radioactive waste in the storage container 3 as described above. May be set to an appropriate thickness such that the radiation is sufficiently shielded.

そして、図４に示すように、この収容容器３を、その内部に放射性廃棄物１を収容した状態のまま遮蔽材１６，１７の内側の空間に挿入する。つまり、収納容器３は、その中から放射性廃棄物１が取り出されることなくそのまま処分容器５に収納されることになる。そして、遮蔽材１６，１７と収納容器３との隙間に内部充填材としてモルタル（図示略）を充填した後、蓋部材１５を溶接により容器本体１４に接合して、地中埋設の為の廃棄体を作製する。   And as shown in FIG. 4, this container 3 is inserted in the space inside the shielding materials 16 and 17 in the state which accommodated the radioactive waste 1 in the inside. That is, the storage container 3 is stored in the disposal container 5 as it is without taking out the radioactive waste 1 from the storage container 3. Then, after filling the gap between the shielding materials 16 and 17 and the storage container 3 with mortar (not shown) as an internal filler, the lid member 15 is joined to the container main body 14 by welding, and discarded for underground burial. Create a body.

ここで、処分容器５の容器本体１４及び蓋部材１５には、貫通穴１０ａ，１１ａを有する収納容器３とは異なり、開口部が設けられていない。つまり、処分容器の容器本体１４と蓋部材１５とが接合された状態では処分容器５は密閉構造を構成するため、その内部の放射性廃棄物１は完全に密閉される。
そして、廃棄体の最終確認を行った後、この廃棄体を処分場内の所定の埋設ピットまで搬送し、地中に埋設処分する。 Here, unlike the storage container 3 having the through holes 10a and 11a, the container main body 14 and the lid member 15 of the disposal container 5 are not provided with openings. That is, in the state where the container main body 14 and the lid member 15 of the disposal container are joined, the disposal container 5 constitutes a sealed structure, so that the radioactive waste 1 inside thereof is completely sealed.
After the final confirmation of the waste body, the waste body is transported to a predetermined buried pit in the disposal site and buried in the ground.

以上説明した放射性廃棄物１の処分方法によれば、次のような効果が得られる。
１）原子力発電所において、最終的な埋設処分に使用される肉厚が厚くて重量の大きい埋設処分用容器とは別の、強度、密閉性等を担保する必要がないために肉厚が比較的薄い収納容器３に放射性廃棄物１を収納し、その収納容器３を輸送用容器４に収納して処分場へ輸送するので、廃棄物輸送時の輸送重量を減らすことができる。従って、輸送、運搬時のクレーン等による輸送用容器４の荷役も容易であるし、一度により多くの放射性廃棄物１を輸送することも可能になり、輸送効率が向上する。また、処分場においては、放射性廃棄物１を収納した収納容器３を、強度、放射線の遮蔽性及び密閉性等を担保する処分容器５に収納するため、埋設処分後に放射性廃棄物１に包含される放射能が地中に容易に漏れ出すのを防止することができる。 According to the disposal method of the radioactive waste 1 demonstrated above, the following effects are acquired.
1) At nuclear power plants, the wall thickness is compared because there is no need to ensure strength, sealing, etc., apart from the thick and heavy buried container used for final disposal. Since the radioactive waste 1 is stored in the thin storage container 3, and the storage container 3 is stored in the transport container 4 and transported to the disposal site, the transport weight during transport of the waste can be reduced. Therefore, it is easy to carry the container 4 for transportation by a crane or the like during transportation and transportation, and it is possible to transport more radioactive waste 1 at a time, thereby improving transportation efficiency. In addition, in the disposal site, the storage container 3 storing the radioactive waste 1 is stored in the disposal container 5 that guarantees strength, radiation shielding, sealing and the like. Can be prevented from leaking easily into the ground.

２）放射性廃棄物１を直接輸送用容器４に収納せず、収納容器３を介して輸送用容器４に収納するため、放射性廃棄物１に付着するクラッド等の汚染した腐食生成物の落下・散乱がなく、輸送用容器４の放射能汚染を低減できる。   2) Since radioactive waste 1 is not directly stored in the transport container 4, but stored in the transport container 4 via the storage container 3, the fall of contaminated corrosion products such as cladding adhering to the radioactive waste 1 There is no scattering, and the radioactive contamination of the transport container 4 can be reduced.

３）収納容器３及び輸送用容器４の下端部に水抜き穴として貫通穴１０ａ，１２ａが形成されているため、これらの貫通穴１０ａ，１２ａから、収納容器３内の水と輸送用容器４内の水を確実に抜くことが可能である。また、収納容器３及び輸送用容器４の上端部にも貫通穴１１ａ，１３ａが形成されているため、その後の乾燥工程において、収納容器３及び輸送用容器４内で蒸発した水分を貫通穴１１ａ，１３ａから放出させて、収納容器３及び輸送用容器４の内部を十分に乾燥させることも可能である。従って、汚染したプール水の漏洩・滴下により汚染範囲が拡大する懸念がなくなると共に、予期しない放射性物質を処分場へ持ち込むことがなくなる。また、放射性廃棄物１を処分場へ輸送する際の輸送重量を確実に減らすことができるため、輸送効率がさらに向上する。   3) Since the through holes 10a and 12a are formed as drain holes in the lower end portions of the storage container 3 and the transport container 4, the water in the storage container 3 and the transport container 4 are formed through these through holes 10a and 12a. It is possible to reliably drain the water inside. Further, since the through holes 11a and 13a are also formed in the upper ends of the storage container 3 and the transport container 4, in the subsequent drying step, the water evaporated in the storage container 3 and the transport container 4 is removed through the through holes 11a. , 13a, and the inside of the storage container 3 and the transport container 4 can be sufficiently dried. Therefore, there is no concern that the contamination range will be expanded due to leakage or dripping of contaminated pool water, and unexpected radioactive materials will not be brought into the disposal site. Moreover, since the transport weight at the time of transporting the radioactive waste 1 to a disposal site can be reduced reliably, transport efficiency further improves.

４）放射性廃棄物１を収納容器３内に収納した後に、その収納容器３をプール２内でそのまま輸送用容器４に収納するので、収納工程を簡略化できる。さらに、その状態のまま、輸送用容器４をプール２から引き上げて放置するだけで、収納容器３及び輸送用容器４内の水抜きを行うことができるので、水抜き作業も簡単になり、一連の収納作業の作業効率をより向上させることができる。   4) After the radioactive waste 1 is stored in the storage container 3, the storage container 3 is stored in the transport container 4 as it is in the pool 2, so that the storage process can be simplified. Furthermore, the water can be drained from the storage container 3 and the transport container 4 simply by lifting the transport container 4 from the pool 2 and leaving it in that state. The work efficiency of the storage operation can be further improved.

５）収納容器３に貫通穴１０ａ，１１ａが形成されているために、貫通穴が形成されていない場合よりも、収納容器３自体の密閉性及び放射線の遮蔽性はやや低下すると考えられる。しかし、処分場へ輸送する際には、収納容器３は輸送用容器４に収納されるし、さらに、放射性廃棄物１の処分場においては、収納容器３は輸送用容器４から取り出されて、密閉性及び放射線の遮蔽性を担保する埋設処分用の処分容器５にそのまま収納されて埋設される。つまり、収納容器３の密閉性及び遮蔽性の低下分を輸送用容器４や処分容器５に担保させることができ、収納容器３には高い密閉性及び遮蔽性が不要になる。また収納容器３の肉厚を薄くして、処分場へ輸送する際の輸送重量を小さくすることも可能になる。   5) Since the through-holes 10a and 11a are formed in the storage container 3, it is considered that the sealing property and the radiation shielding property of the storage container 3 itself are slightly lowered as compared with the case where no through-hole is formed. However, when transporting to the disposal site, the storage container 3 is stored in the transport container 4, and further, in the disposal site of the radioactive waste 1, the storage container 3 is taken out from the transport container 4, It is housed and buried as it is in a disposal container 5 for embedding disposal that ensures sealing and radiation shielding. In other words, a decrease in the sealing property and shielding property of the storage container 3 can be secured to the transport container 4 and the disposal container 5, and the storage container 3 does not need high sealing property and shielding property. It is also possible to reduce the thickness of the storage container 3 and reduce the transport weight when transporting to the disposal site.

６）放射性廃棄物１の収納時に表面が放射能で汚染された収納容器３をそのまま処分容器５内に収納するため、処分容器５の表面は汚染されず、処分容器５表面の除染を行うことなしに処分場において人手にて取り扱うことができ、作業効率が向上するし、処分場にそのための除染施設を設ける必要がない。また、収納容器３から放射性廃棄物１を取り出さずにそのまま処分容器５に収納するので、処分場において放射性廃棄物１の詰め替えを行う必要がなく、作業効率が向上する。さらに、放射性廃棄物の発生元、発生量、種類、放射能濃度等の各種情報の履歴を処分場で容易に追跡管理でき、処分場における放射性廃棄物データ管理の信頼性が高くなるし、各々の放射性廃棄物に対する責任の所在を容易に識別できる。さらに、原子力発電所側では、放射性廃棄物１の放射能を測定して収納容器３に収容し、処分場側では、収納容器３を処分容器５にそのまま収納して廃棄体を作製するというように役割が分担されるため、発電所側と処分場側との間での責任分担が明確になる。   6) Since the storage container 3 whose surface is contaminated with radioactivity when the radioactive waste 1 is stored is stored in the disposal container 5 as it is, the surface of the disposal container 5 is not contaminated and the surface of the disposal container 5 is decontaminated. It can be handled manually at the disposal site, and the work efficiency is improved, and it is not necessary to provide a decontamination facility therefor. Further, since the radioactive waste 1 is not taken out from the storage container 3 and is stored in the disposal container 5 as it is, it is not necessary to refill the radioactive waste 1 at the disposal site, and the work efficiency is improved. Furthermore, the history of various information such as the source, generation amount, type, and radioactivity concentration of radioactive waste can be easily tracked and managed at the disposal site, increasing the reliability of the management of radioactive waste data at the disposal site. It is easy to identify the responsibility for radioactive waste. Furthermore, on the nuclear power plant side, the radioactivity of the radioactive waste 1 is measured and stored in the storage container 3, and on the disposal site side, the storage container 3 is stored as it is in the disposal container 5 to produce a waste body. Therefore, the division of responsibility between the power plant side and the disposal site side becomes clear.

７）収納容器３は、放射性廃棄物１を直接収納するとともに耐食性を担保し、処分容器５は、地中埋設処分後の、放射線の遮蔽性、密閉性及び外力あるいは外部からの衝撃等に対する強度を担保する。また、遮蔽材１６，１７は、放射線の遮蔽性向上を担保している。従って、収納容器３は高耐食性金属であるステンレス鋼で構成するとともに肉厚を比較的薄くし、処分容器５は鉄系金属である炭素鋼で構成するとともに肉厚を厚くし、遮蔽材は、安価なねずみ鋳鉄等の材料で構成するとともに肉厚をかなり厚くする。このように、収納容器３、処分容器５及び遮蔽材１６，１７に関して、夫々の担保する機能に応じた適切な材料及び肉厚を選定することで、処分用容器構造のコストを極力低減することが可能になる。   7) The storage container 3 directly stores the radioactive waste 1 and guarantees corrosion resistance, and the disposal container 5 is shielded against radiation, sealed and external force or strength against external impact after underground disposal. To secure. Further, the shielding materials 16 and 17 ensure improvement in radiation shielding properties. Therefore, the storage container 3 is made of stainless steel, which is a highly corrosion-resistant metal, and has a relatively thin wall thickness. The disposal container 5 is made of carbon steel, which is an iron-based metal, and has a thick wall thickness. It is made of an inexpensive material such as gray cast iron and the thickness is considerably increased. Thus, regarding the storage container 3, the disposal container 5, and the shielding materials 16 and 17, by selecting an appropriate material and thickness according to the functions secured by each, the cost of the disposal container structure can be reduced as much as possible. Is possible.

次に、前記実施形態に種々の変更を加えた変更形態について説明する。
１］収納容器３、輸送用容器４、処分容器５及び遮蔽材１６，１７の材質や径及び肉厚等のサイズに関しては、放射性廃棄物１の放射能量、輸送量等を勘案して適宜自由に設定できる。 Next, modified embodiments in which various modifications are made to the embodiment will be described.
1] The material, diameter and thickness of the storage container 3, the transport container 4, the disposal container 5 and the shielding materials 16 and 17 can be freely determined in consideration of the radioactivity amount, transport amount, etc. of the radioactive waste 1. Can be set.

２］収納容器、輸送用容器及び処分容器は、何れも円筒形状のものに限られず、種々の形状のものを採用可能である。例えば、図５に示すように、角筒形状の容器本体２０及び蓋部材２１を有し放射性廃棄物１を収納する収納容器３Ａと、同じく角筒形状の容器本体２２と蓋部材２３とを有し収納容器３Ａを収納する処分容器５Ａとを用いて、廃棄体を作製してもよい。   2] The storage container, the transport container, and the disposal container are not limited to cylindrical shapes, and various shapes can be adopted. For example, as shown in FIG. 5, a storage container 3A having a rectangular tube-shaped container body 20 and a lid member 21 for storing radioactive waste 1, and a rectangular tube-shaped container body 22 and a lid member 23 are also provided. The waste body may be produced using the disposal container 5A for storing the storage container 3A.

３］図１の乾燥工程において、加熱空気供給装置２０により加熱空気を輸送用容器４に供給する代わりに、真空ポンプにより収納容器３及び輸送用容器４内の空気を吸引して、収納容器３及び輸送用容器４内の水分を蒸発させるようにしてもよい。   3] In the drying process of FIG. 1, instead of supplying heated air to the transport container 4 by the heated air supply device 20, the air in the storage container 3 and the transport container 4 is sucked by the vacuum pump to store the storage container 3 In addition, the moisture in the transport container 4 may be evaporated.

４］前記実施形態では、放射性廃棄物を貯蔵するプールにおいて放射性廃棄物を収納容器に収納するが、放射性廃棄物をプールから収納作業用の別のプールに移してから、その収納作業用のプールにおいて放射性廃棄物を収納容器に収納するようにしてもよい。   4] In the above embodiment, the radioactive waste is stored in the storage container in the pool for storing the radioactive waste. However, after the radioactive waste is transferred from the pool to another pool for storing work, the pool for storing work is stored. The radioactive waste may be stored in a storage container.

５］容器本体１０とその中に収容された放射性廃棄物の間に空間が存在していると、容器本体１０内に水などが入り込む虞があるため、処分場において、容器本体１０内にモルタル等を充填するようにしてもよい。この場合は、原子力発電所で容器本体１０に放射性廃棄物１を収納した後においては、容器本体１０に蓋部材１１を着脱可能な程度に取り付けておき、処分場において蓋部材１１を一旦取り外して容器本体１０内にモルタル等を充填した後に、蓋部材１１を容器本体１０に着脱不能に接合する。   5] If there is a space between the container main body 10 and the radioactive waste accommodated therein, water or the like may enter the container main body 10. Therefore, the mortar is placed in the container main body 10 at the disposal site. Etc. may be filled. In this case, after the radioactive waste 1 is stored in the container main body 10 at the nuclear power plant, the lid member 11 is attached to the container main body 10 so as to be detachable, and the lid member 11 is temporarily removed at the disposal site. After filling the container body 10 with mortar or the like, the lid member 11 is non-detachably joined to the container body 10.

６］原子力発電所からの放射性廃棄物に限らず、使用済み核燃料の再処理設備等、他の原子力関連施設から発生する放射性廃棄物の処分についても、本発明を適用できることはいうまでもない。   6] Needless to say, the present invention can be applied not only to radioactive waste from nuclear power plants but also to disposal of radioactive waste generated from other nuclear-related facilities such as reprocessing equipment for spent nuclear fuel.

本発明の実施形態に係る放射性廃棄物の埋設処分の工程図である。It is process drawing of the disposal disposal of the radioactive waste which concerns on embodiment of this invention. 廃棄物収納工程及び容器収納工程の説明図である。It is explanatory drawing of a waste storage process and a container storage process. 水抜き工程及び乾燥工程の説明図である。It is explanatory drawing of a draining process and a drying process. 収納容器及び処分容器の斜視図である。It is a perspective view of a storage container and a disposal container. 変更形態における収納容器と処分容器の分解斜視図である。It is a disassembled perspective view of the storage container and disposal container in a change form.

符号の説明Explanation of symbols

１ 放射性廃棄物
２ プール
３ 収納容器
４ 輸送用容器
５ 処分容器
１０ａ，１１ａ 貫通穴（水抜き穴）
１２ａ，１３ａ 貫通穴（水抜き穴）
１０ 容器本体
１１ 蓋部材
２０ 加熱空気供給装置 DESCRIPTION OF SYMBOLS 1 Radioactive waste 2 Pool 3 Storage container 4 Transport container 5 Disposal container 10a, 11a Through hole (drain hole)
12a, 13a Through hole (drain hole)
DESCRIPTION OF SYMBOLS 10 Container main body 11 Lid member 20 Heating air supply apparatus

Claims (9)

放射性廃棄物の発生場所において、放射性廃棄物を収納容器に収納してからこの収納容器を輸送用容器に収納する放射性廃棄物の収納方法であって、
プール内の放射性廃棄物を前記収納容器に収納可能な形状に成形してから、前記プール内において放射性廃棄物を前記収納容器に収納する第１収納工程と、
前記プール内において前記収納容器を前記輸送用容器に収納する第２収納工程と、
前記収納容器を前記輸送用容器に収納した状態で、前記プール外において前記収納容器内の水と前記輸送用容器内の水を、前記収納容器と前記輸送用容器にそれぞれ設けられた水抜き穴を介して外部へ排出する水抜き工程と、
を備えたことを特徴とする放射性廃棄物の収納方法。 A radioactive waste storage method in which a radioactive waste is stored in a storage container and then stored in a transport container at a location where the radioactive waste is generated,
A first storage step of storing radioactive waste in the pool into a shape that can be stored in the storage container, and then storing radioactive waste in the storage container in the pool;
A second storage step of storing the storage container in the transport container in the pool;
In the state where the storage container is stored in the transport container, the water in the storage container and the water in the transport container are provided in the storage container and the transport container, respectively, outside the pool. Draining process to be discharged to the outside through
A method for storing radioactive waste, comprising: 前記水抜き工程後に、前記水抜き穴を介して収納容器内の水分を放出させて収納容器の内部を乾燥させる乾燥工程を備えたことを特徴とする請求項１に記載の放射性廃棄物の収納方法。   The radioactive waste storage according to claim 1, further comprising a drying step of drying the inside of the storage container by releasing moisture in the storage container through the drain hole after the draining process. Method. 前記乾燥工程において、収納容器内に加熱空気を供給して収納容器の内部を乾燥させることを特徴とする請求項２に記載の放射性廃棄物の収納方法。   The method for storing radioactive waste according to claim 2, wherein in the drying step, heated air is supplied into the storage container to dry the inside of the storage container. 前記乾燥工程において、真空ポンプを用いて収納容器の内部を乾燥させることを特徴とする請求項２に記載の放射性廃棄物の収納方法。   The method for storing radioactive waste according to claim 2, wherein in the drying step, the inside of the storage container is dried using a vacuum pump. 前記水抜き工程において、前記収納容器が収納された前記輸送用容器をプールから引き上げた状態で放置してその水抜きを行うことを特徴とする請求項１〜４の何れかに記載の放射性廃棄物の収納方法。   The radioactive waste according to any one of claims 1 to 4, wherein in the water draining step, the transporting container in which the storage container is stored is left in a state where it is pulled up from the pool to drain the water. How to store things. 前記収納容器を収納した輸送用容器を放射性廃棄物の処分場へ輸送した後、輸送用容器から収納容器を取り出して、この収納容器を、その中から放射性廃棄物を取り出すことなく、処分場における埋設処分用の処分容器に収納することを特徴とする請求項１〜５の何れかに記載の放射性廃棄物の収納方法。   After transporting the transport container storing the storage container to the radioactive waste disposal site, the storage container is taken out from the transport container, and the storage container is removed from the waste container without taking out the radioactive waste. The radioactive waste storage method according to claim 1, wherein the radioactive waste is stored in a disposal container for buried disposal. プール内で放射性廃棄物が収納された状態で輸送用容器に収納される収納容器であって、その内部の水抜きを行う為の水抜き穴が設けられたことを特徴とする放射性廃棄物の収納容器。   A storage container that is stored in a transport container in a state where radioactive waste is stored in a pool, and is provided with a water drain hole for draining the inside thereof. Storage container. 容器本体とこの容器本体の上端部に接合される蓋部材とを有し、これら容器本体と蓋部材の双方に前記水抜き穴が夫々形成されていることを特徴とする請求項７に記載の放射性廃棄物の収納容器。   The container body and a lid member joined to the upper end portion of the container body, and the drain holes are formed in both the container body and the lid member, respectively. A container for radioactive waste. 放射性廃棄物をその発生場所から処分場に輸送するための輸送用容器であって、前記放射性廃棄物を収納した収納容器を収納でき、且つ、その内部の水抜きを行う為の水抜き穴が設けられたことを特徴とする放射性廃棄物の輸送用容器。   A transport container for transporting radioactive waste from the place where it is generated to a disposal site, which can store a storage container storing the radioactive waste, and has a drain hole for draining water inside the container. A container for transporting radioactive waste characterized by being provided.
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JP2015506478A (en) * 2012-01-26 2015-03-02 アレヴァ ゲゼルシャフト ミット ベシュレンクテル ハフツングＡｒｅｖａ ＧｍｂＨ Container, apparatus and method for hermetically encapsulating fuel rods or fuel rod parts
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KR102007724B1 (en) * 2019-04-29 2019-08-07 (주)코네스코퍼레이션 A transport and disposal container of radioactive waste products
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