JPH0441317B2 - - Google Patents
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- Publication number
- JPH0441317B2 JPH0441317B2 JP58241485A JP24148583A JPH0441317B2 JP H0441317 B2 JPH0441317 B2 JP H0441317B2 JP 58241485 A JP58241485 A JP 58241485A JP 24148583 A JP24148583 A JP 24148583A JP H0441317 B2 JPH0441317 B2 JP H0441317B2
- Authority
- JP
- Japan
- Prior art keywords
- storage container
- water
- radioactive
- container
- ion exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【発明の詳細な説明】 本発明は放射性物質収納容器に関する。[Detailed description of the invention] The present invention relates to a radioactive material storage container.
たとえば燃料被覆管に損傷のある使用済核燃料
等の放射性物質を貯蔵したり輸送する方法とし
て、その放射性物質を、水を満たした収納容器に
収納し、その放射性物質収納容器をプール中に貯
蔵したり、水を満たした輸送容器内に収納して輸
送することがおこなわれている。ここで問題とな
つているのが、放射性物質の崩壊熱により圧力調
整弁より外部へ漏出してプール水や輸送容器内の
水を汚染するということである。そこで従来、上
記圧力調整弁の吐出口に焼結金属フイルターを設
けることが考えられているが、これでは放射性物
質の除去が十分でないばかりでなく、フイルター
が放射性物質収納容器の外側に設けられてあるこ
とから、固形物による弁の閉塞や弁部の汚染が生
じる。またフイルターに一旦除去された放射性物
質が収納容器本体に対する衝撃等によりプール水
や輸送容器内の水に流出するおそれがあり放射線
防護上からも取扱いが容易ではない。さらに、プ
ール内で収納容器本体から放射性物質（使用済核
燃料棒）を抜き取るときに収納容器内の水を置換
するために、蓋に給水用カプラと排水用カプラと
を設け、給水用カプラの先端に収納容器の底部近
傍まで延びる給水用パイプを設けて、収納容器の
底部に新しい水を注水するとともに排水用カプラ
から排水を行うような構造であつた。この構造で
は、収納容器内に給水用パイプを設けるため、そ
の分収納容器が大きくなり、ひいては輸送容器本
体も大きくなるという問題があつた。また、収納
容器から放射性物質の流出を防止するために収納
容器を密閉することも考えられるが、これは収納
容器を耐圧構造としなければならず、構造が複雑
となり、高価なものとなる。 For example, as a method of storing and transporting radioactive materials such as spent nuclear fuel with damaged fuel cladding, the radioactive materials are stored in a storage container filled with water, and the radioactive material storage container is stored in a pool. It is also carried out by storing it in a transport container filled with water. The problem here is that the decay heat of the radioactive material leaks out from the pressure regulating valve and contaminates the pool water and the water in the transport container. Conventionally, it has been considered to provide a sintered metal filter at the discharge port of the pressure regulating valve, but this method not only does not remove radioactive materials sufficiently, but also requires that the filter be installed outside the radioactive material storage container. This causes valve blockage and valve contamination due to solids. Furthermore, the radioactive substances once removed by the filter may leak into the pool water or the water in the transport container due to impact against the storage container body, and handling is not easy from the standpoint of radiation protection. Furthermore, in order to replace the water in the storage container when removing radioactive materials (spent nuclear fuel rods) from the storage container body in the pool, a water supply coupler and a drainage coupler are provided on the lid, and the tip of the water supply coupler is The structure was such that a water supply pipe extending to the vicinity of the bottom of the storage container was installed, and new water was injected into the bottom of the storage container and water was drained from the drain coupler. In this structure, since the water supply pipe is provided inside the storage container, there is a problem in that the storage container becomes larger and, by extension, the transport container itself also becomes larger. It is also possible to seal the storage container in order to prevent radioactive substances from leaking out of the storage container, but this would require the storage container to have a pressure-resistant structure, making the structure complicated and expensive.
そこで本発明はかかる問題を解消した放射性物
質収納容器を提供するものであつて、その特徴と
するところは、水を満たした内部に放射性物質を
収納し、水中に配設される放射性物質収納容器に
おいて、底部に逆止弁を配設し、蓋部に形成した
貫通穴外側にカプラを接続すると共にその貫通穴
の内側にイオン交換体を配設したことにある。か
かる構成によれば、放射性物質を収納容器外へ取
出す際に、収納容器をプール中または輸送容器中
に収納したままでカプラに配管を接続し、ポンプ
の作動によりその配管を介して収納容器中の水を
吸引すると、収納容器内が負圧となり、逆止弁を
介して収納容器内に水が供給され、収納容器内の
汚染水と置換され、プールまたは輸送容器内をあ
まり汚染せずに取出しができるものである。また
収納容器内からカプラを通つて外部へ漏出しよう
とする放射性物質汚染水に含まれる放射性物質が
イオン交換体とのイオン交換によりほとんど除去
され、カプラから外部へは放射性物質をほとんど
含まない水が漏出させられるものである。また上
記イオン交換体は収納容器内に設けられてあるか
ら、この点からも放射性物質が収納容器の外へ漏
出させられないものである。したがつてプール水
や輸送容器内の水の汚染を非常に少なくできる。
さらに収納容器を耐圧構造にする必要がなく、構
造が簡単で安価である。 Therefore, the present invention provides a radioactive material storage container that solves this problem, and its features include a radioactive material storage container that stores radioactive materials inside the water-filled interior and is disposed underwater. A check valve is disposed at the bottom, a coupler is connected to the outside of a through hole formed in the lid, and an ion exchanger is disposed inside the through hole. According to this configuration, when taking radioactive substances out of the storage container, the piping is connected to the coupler while the storage container is stored in the pool or the transportation container, and the pump is activated to remove the radioactive material from the storage container through the piping. When the water is sucked in, the inside of the storage container becomes negative pressure, water is supplied into the storage container through the check valve, and the contaminated water in the storage container is replaced without contaminating the pool or transportation container. It can be taken out. In addition, most of the radioactive substances contained in radioactive contaminated water that attempts to leak from the storage container to the outside through the coupler are removed by ion exchange with the ion exchanger, and water containing almost no radioactive substances flows from the coupler to the outside. It is something that can be leaked. Furthermore, since the ion exchanger is provided within the storage container, radioactive substances are not allowed to leak out of the storage container. Therefore, contamination of pool water and water in transport containers can be greatly reduced.
Furthermore, there is no need for the storage container to have a pressure-resistant structure, and the structure is simple and inexpensive.
以下、本発明の一実施例を図に基づいて説明す
る。この実施例は内部に水が満たされる放射性物
質収納容器１を、水が入れられた輸送容器本体２
の内筒３内に収納して輸送する場合に関し、４は
輸送容器蓋、５は収納容器１の本体６の上端開口
部にボルト７により固定された蓋、８は蓋部５に
形成されたねじ孔９にねじ込まれたイオン交換体
容器であつて、その内部には中径部１０Ａ、小径
部１０Ｂおよび大径部１０Ｃからなる貫通孔１０
を形成してあり、さらに中径部１０Ａ側の端部に
形成した鍔部８Ａは蓋部５の外側面に圧接してい
る。１１は中径部１０Ａ内に挿入されると共に一
端の雄ねじ部が小径部１０Ｂの雌ねじに螺合する
雄型カプラ、１２は大径部１０Ｃ内に挿入される
と共にその大径部１０Ｃの入口に形成した雌ねじ
に螺合するイオン交換体であつて、その内部にイ
オン交換体樹脂、無機質イオン交換体、活性炭等
を充填してある。１３はイオン交換体１２の両端
に配設されたフイルタ、１４はイオン交換体１２
の一端にスポツト溶接されたリング状フイルタ押
え、１５は汚染水吸入用配管であつて、一端はポ
ンプ（図示せず）に接続され、他端の雌型カプラ
１６は雄型カプラ１１に対して嵌合自在である。
１７は収納容器１の底部１８に形成された凹部１
９のねじ穴２０にねじ込まれた複数（この実施例
では３つ）の逆止弁であつて、収納容器１内が負
圧になると、輸送容器本体２内の水がその逆止弁
１７を介して収納容器１内に入るのを許容するも
のである。２１な吊具である。 Hereinafter, one embodiment of the present invention will be described based on the drawings. This embodiment includes a radioactive material storage container 1 filled with water, and a transport container body 2 filled with water.
In the case of storing and transporting the container in the inner cylinder 3, 4 is a transportation container lid, 5 is a lid fixed to the upper end opening of the main body 6 of the storage container 1 with a bolt 7, and 8 is a lid formed on the lid part 5. It is an ion exchanger container screwed into a screw hole 9, and inside thereof there is a through hole 10 consisting of a medium diameter portion 10A, a small diameter portion 10B, and a large diameter portion 10C.
Furthermore, a flange 8A formed at the end on the side of the medium diameter portion 10A is in pressure contact with the outer surface of the lid portion 5. A male coupler 11 is inserted into the medium diameter portion 10A and the male threaded portion at one end is screwed into the female thread of the small diameter portion 10B, and 12 is inserted into the large diameter portion 10C and is connected to the entrance of the large diameter portion 10C. It is an ion exchanger that is screwed into the formed female thread, and the inside of the ion exchanger is filled with ion exchanger resin, inorganic ion exchanger, activated carbon, etc. 13 is a filter disposed at both ends of the ion exchanger 12; 14 is the ion exchanger 12;
A ring-shaped filter holder 15 is spot-welded to one end, and 15 is a pipe for suctioning contaminated water. One end is connected to a pump (not shown), and the female coupler 16 at the other end is connected to the male coupler 11. Can be fitted freely.
17 is a recess 1 formed in the bottom 18 of the storage container 1
A plurality of (three in this embodiment) check valves are screwed into the screw holes 20 of 9, and when the inside of the storage container 1 becomes negative pressure, the water in the transport container main body 2 closes the check valves 17. This allows entry into the storage container 1 through the holder. It is a 21-year hanging tool.
上記構成の作用を説明する。第１図に示すごと
く輸送している状態において、放射性物質の崩壊
熱によつて収納容器１内の放射性物質汚染水が加
熱されると、熱膨脹し、その汚染水の一部がイオ
ン交換体１２内を通過し、雄型カプラ１１を通つ
て輸送容器本体２外に漏出するわけであるが、汚
染水がイオン交換体１２内を通過する際にその汚
染水に含まれる放射性物質がイオン交換体１２と
のイオン交換によりほとんど除去され、雄型カプ
ラ１１から輸送容器本体２内には放射性物質をほ
とんど含まない水が漏出させられるものである。
次に放射性物質を収納容器１外に取出す際には、
収納容器１の蓋５を開ける前に収納容器１内の汚
染を極力減少させておくことが、輸送容器本体２
内およびプール水の汚染を防止する上で重要であ
る。そこでこの実施例では、かかる場合には雌型
カプラ１６を雄型カプラ１１に接続し、ポンプを
作動させて配管１５を介して収納容器１内の汚染
水を吸引し、排出する。すると収納容器１内が負
圧となるので、輸送容器本体２内の水が逆止弁１
７を介して収納容器１内に入り、その収納容器１
内の汚染水と置換される。なおこの場合、収容容
器１から排出される汚染水はイオン交換体１２を
通過して排出されるので、その廃液中の放射性物
質は減少する。 The operation of the above configuration will be explained. During transportation as shown in FIG. 1, when the radioactive material-contaminated water in the storage container 1 is heated by the decay heat of the radioactive material, it thermally expands and a portion of the contaminated water is transferred to the ion exchanger 12. The contaminated water passes through the ion exchanger 12 and leaks out of the transport container main body 2 through the male coupler 11, but when the contaminated water passes through the ion exchanger 12, the radioactive substances contained in the contaminated water leak into the ion exchanger. Most of the radioactive substances are removed by ion exchange with the male coupler 12, and water containing almost no radioactive substances leaks from the male coupler 11 into the transport container body 2.
Next, when taking out the radioactive material outside the storage container 1,
It is important to reduce contamination inside the storage container 1 as much as possible before opening the lid 5 of the storage container 1.
This is important in preventing contamination of pool water. Therefore, in this embodiment, in such a case, the female coupler 16 is connected to the male coupler 11, and the pump is operated to suck the contaminated water in the storage container 1 through the pipe 15 and discharge it. Then, the inside of the storage container 1 becomes negative pressure, so the water inside the transportation container main body 2 flows through the check valve 1.
7 into the storage container 1, and the storage container 1
The contaminated water inside is replaced. In this case, the contaminated water discharged from the storage container 1 passes through the ion exchanger 12 and is discharged, so the amount of radioactive substances in the waste liquid is reduced.
以上述べたごとく本発明によれば、放射性物質
を収納容器外へ取出す際に、収納容器をプール中
または輸送容器中に収納したままでカプラに配管
を接続し、ポンプの作動によりその配管を介して
収納容器中の水を吸引すると、収納容器内が負圧
となり、逆止弁を介して収納容器内に水が供給さ
れ、収納容器内の汚染水と置換され、プールまた
は輸送容器内をあまり汚染せずに取出しができる
ものである。また収納容器内からカプラを通つて
外部へ漏出しようとする放射性物質汚染水に含ま
れる放射性物質がイオン交換体とのイオン交換に
よりほとんど除去され、カプラから外部へは放射
性物質をほとんど含まない水が漏出させられるも
のである。また上記イオン交換体は収納容器内に
設けられてあるから、この点からも放射性物質が
収納容器の外へ漏出させられないものである。し
たがつてプール水や輸送容器内の水の汚染を非常
に少なくできる。しかも、底部に逆止弁を設けた
ため、収納容器内に特別な配管を必要とせず、収
納容器を小さなスペースで簡単な構造とすること
ができる。 As described above, according to the present invention, when taking radioactive materials out of the storage container, piping is connected to the coupler while the storage container is stored in the pool or transport container, and the pump is activated to remove the radioactive material through the piping. When the water in the storage container is sucked out, the inside of the storage container becomes negative pressure, and water is supplied into the storage container through the check valve, displacing the contaminated water in the storage container, and leaving the pool or transport container unattended. It can be removed without contamination. In addition, most of the radioactive substances contained in radioactive contaminated water that attempts to leak from the storage container to the outside through the coupler are removed by ion exchange with the ion exchanger, and water containing almost no radioactive substances flows from the coupler to the outside. It is something that can be leaked. Furthermore, since the ion exchanger is provided within the storage container, radioactive substances are not allowed to leak out of the storage container. Therefore, contamination of pool water and water in transport containers can be greatly reduced. Furthermore, since the check valve is provided at the bottom, no special piping is required within the storage container, and the storage container can be constructed in a small space and with a simple structure.
図は本発明の一実施例を示し、第１図は輸送容
器の縦断面図、第２図は放射性物質収納容器の縦
断面図、第３図は同容器の平面図、第４図は第２
図の−矢視図、第５図はイオン交換体付近の
縦断面図、第６図は逆止弁付近の縦断面図であ
る。
１……放射性物質収納容器、２……輸送容器本
体、５……蓋、８……イオン交換体容器、１０…
…貫通穴、１１……雄型カプラ、１２……イオン
交換体、１５……汚染水吸入用配管、１６……雌
型カプラ、１７……逆止弁、１８……底板。
The figures show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view of a transport container, Fig. 2 is a longitudinal sectional view of a radioactive material storage container, Fig. 3 is a plan view of the same container, and Fig. 4 is a longitudinal sectional view of a transport container. 2
5 is a longitudinal sectional view of the vicinity of the ion exchanger, and FIG. 6 is a longitudinal sectional view of the vicinity of the check valve. DESCRIPTION OF SYMBOLS 1...Radioactive substance storage container, 2...Transportation container body, 5...Lid, 8...Ion exchanger container, 10...
...Through hole, 11... Male coupler, 12... Ion exchanger, 15... Contaminated water intake piping, 16... Female coupler, 17... Check valve, 18... Bottom plate.
Claims (1)
中に配設される放射性物質収納容器であつて、底
部に逆止弁を配設し、蓋部に形成した貫通穴の外
側にカプラを接続すると共にその貫通穴の内側に
イオン交換体を配設したことを特徴とする放射性
物質収納容器。1 A radioactive material storage container that stores radioactive materials inside the water and is placed underwater, with a check valve installed at the bottom and a coupler connected to the outside of the through hole formed in the lid. A radioactive substance storage container characterized in that an ion exchanger is arranged inside the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58241485A JPS60131498A (en) | 1983-12-20 | 1983-12-20 | Radioactive material storage container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58241485A JPS60131498A (en) | 1983-12-20 | 1983-12-20 | Radioactive material storage container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60131498A JPS60131498A (en) | 1985-07-13 |
| JPH0441317B2 true JPH0441317B2 (en) | 1992-07-07 |
Family
ID=17075012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58241485A Granted JPS60131498A (en) | 1983-12-20 | 1983-12-20 | Radioactive material storage container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60131498A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2654219B1 (en) * | 1989-11-09 | 1992-02-14 | Cogema | DEVICE FOR MEASURING THE DOSE RATE IN A TRANSPORT CASTLE CONTAINING RADIOACTIVE WASTE. |
| JP5940420B2 (en) * | 2012-09-19 | 2016-06-29 | 三菱重工業株式会社 | Fuel storage method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5343910A (en) * | 1976-10-01 | 1978-04-20 | Enu Kee Aaru Giken Kk | Protection member for rainnwater gutter in metal panel roof |
-
1983
- 1983-12-20 JP JP58241485A patent/JPS60131498A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60131498A (en) | 1985-07-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |