JPH0850196A - Shielding and cooling device for spent fuel transporting vessel - Google Patents
Shielding and cooling device for spent fuel transporting vesselInfo
- Publication number
- JPH0850196A JPH0850196A JP6202792A JP20279294A JPH0850196A JP H0850196 A JPH0850196 A JP H0850196A JP 6202792 A JP6202792 A JP 6202792A JP 20279294 A JP20279294 A JP 20279294A JP H0850196 A JPH0850196 A JP H0850196A
- Authority
- JP
- Japan
- Prior art keywords
- spent fuel
- shielding
- container
- polyethylene
- cooling device
- 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
Landscapes
- Packages (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、高温ガス炉から取り
出された使用済燃料を輸送または一時保管する輸送容器
の遮へい及び冷却装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielding and cooling device for a transportation container for transporting or temporarily storing spent fuel taken out from a high temperature gas reactor.
【０００２】[0002]
【従来の技術】高温ガス炉は、冷却材の入口温度，出口
温度を高温にして発電用原子炉として経済性向上を図っ
たもので、核燃料に被覆燃料粒子を、冷却材にヘリウム
を使用する。ヘリウムは、高温下でも黒鉛と反応をおこ
さないために用いられいる。燃料交換機を原子炉のドア
バルブの上部に設置し、使用済燃料を炉心から取り出
し、燃料交換機の本体と結合された輸送容器に使用済燃
料を収納する。さらに燃料交換機と共に輸送容器を移動
させ、輸送容器から使用済燃料を貯蔵ラックへ移し、代
わりに新燃料を貯蔵ラックから輸送容器へ収納し、輸送
容器から新燃料を炉心へ充填して燃料を交換する。2. Description of the Related Art A high-temperature gas reactor is a reactor for power generation, in which the inlet temperature and the outlet temperature of the coolant are increased to improve the economical efficiency. The coated fuel particles are used as the nuclear fuel and helium is used as the coolant. . Helium is used because it does not react with graphite even at high temperatures. The refueling machine is installed above the door valve of the reactor, the spent fuel is taken out from the core, and the spent fuel is stored in the transportation container connected to the main body of the refueling machine. Furthermore, the transportation container is moved together with the refueling machine, the spent fuel is transferred from the transportation container to the storage rack, the new fuel is stored in the transportation container from the storage rack, and the new fuel is filled from the transportation container into the core to exchange the fuel. To do.
【０００３】図２は従来の使用済燃料輸送容器の縦断面
図である。図２において、使用済燃料１は、容器２に収
納され固定治具４によって固定されている。輸送容器２
は外周に貼り付けられたポリエチレン遮へい体３により
遮へいされている。また、使用済燃料から放出される崩
壊熱を発散させるために、輸送容器２の外側に冷却フィ
ン５が取り付けられている。図２において、ポリエチレ
ン遮へい体３が容器本体の側面に取り付けられているの
は、使用済燃料の輸送あるいは一次保管する際、作業員
が輸送容器の上面からは近付かないと想定しているから
である。燃料取扱施設の天井が低く放射能の散乱による
影響を考慮しなければならない場合や、輸送容器そのも
のが小さく、作業員が直接容器を持ち運ぶ場合には、容
器の上面にもポリエチレン遮へい体を設ける必要があ
る。FIG. 2 is a longitudinal sectional view of a conventional spent fuel transportation container. In FIG. 2, the spent fuel 1 is stored in a container 2 and fixed by a fixing jig 4. Shipping container 2
Is shielded by a polyethylene shield 3 attached to the outer periphery. A cooling fin 5 is attached to the outside of the transportation container 2 in order to dissipate the decay heat released from the spent fuel. In FIG. 2, the polyethylene shield 3 is attached to the side surface of the container body because it is assumed that the worker does not approach the top surface of the transportation container when the spent fuel is transported or temporarily stored. is there. If the ceiling of the fuel handling facility is low and the effects of radioactivity scattering must be taken into account, or if the transport container itself is small and workers carry it directly, it is necessary to provide a polyethylene shield on the top of the container. There is.
【０００４】[0004]
【発明が解決しようとする課題】使用済燃料を容器内に
収容して輸送または一時保管する場合に、使用済燃料か
ら放出される中性子を遮へいするためにはポリエチレン
遮へい体は効果的であるが、崩壊熱によってポリエチレ
ンが溶けてしまう欠点があった。使用済燃料から放出さ
れる熱を発散させるため、従来は冷却フィン５を備えて
いたので、輸送容器の構造が複雑であった。The polyethylene shield is effective for shielding the neutrons emitted from the spent fuel when the spent fuel is housed in a container for transportation or temporary storage. However, there was a drawback that polyethylene was melted by the heat of decay. In order to dissipate the heat released from the spent fuel, the cooling fins 5 are conventionally provided, so that the structure of the transportation container is complicated.
【０００５】この発明は、使用済燃料を輸送または一時
保管する輸送容器において、容器本体とポリエチレン遮
へい体とを空気の自然対流により冷却するようにした使
用済燃料輸送容器の遮へい及び冷却装置を提供すること
を目的とする。The present invention provides a shielding and cooling device for a spent fuel transportation container, in which a container body and a polyethylene shielding body are cooled by natural convection of air in a transportation container for transporting or temporarily storing spent fuel. The purpose is to do.
【０００６】[0006]
【課題を解決するための手段】使用済燃料を輸送または
一時保管するように円筒状の容器本体の外周にポリエチ
レン遮へい体を備えた使用済燃料輸送容器において、前
記容器本体と前記ポリエチレン遮へい体との間に空気の
流通路を設けたことによって、上記目的を達成する。In a spent fuel transportation container having a polyethylene shield on the outer periphery of a cylindrical container body for transporting or temporarily storing spent fuel, the container body and the polyethylene shield are provided. The above object is achieved by providing an air flow passage between the two.
【０００７】また、ポリエチレン遮へい体は容器本体の
外周に上下に放射状に配置された複数の間隔片を介して
支持されるようにすれば、使用済燃料輸送容器を遮へい
及び冷却する上に好適である。If the polyethylene shield is supported by a plurality of spacing pieces vertically arranged on the outer periphery of the container body, it is suitable for shielding and cooling the spent fuel transportation container. is there.
【０００８】[0008]
【作用】この発明においては、容器本体とポリエチレン
遮へい体との間に空気の流通路を設けたので、容器本体
とポリエチレン遮へい体との間に空気が流通して、容器
本体及びポリエチレン遮へい体を共に冷却することがで
きる。また、ポリエチレン遮へい体によって、容器内の
使用済燃料から放出される中性子を遮へいすることがで
きる。In the present invention, since the air flow path is provided between the container body and the polyethylene shield, air circulates between the container body and the polyethylene shield, and the container body and the polyethylene shield are separated from each other. Can be cooled together. In addition, the polyethylene shield can shield neutrons emitted from the spent fuel in the container.
【０００９】また、ポリエチレン遮へい体は容器本体の
外周の上下に放射状に配置された間隔片を介して支持さ
れているので、容器本体とポリエチレン遮へい体との間
の流通路を通る空気の自然対流により、使用済燃料の崩
壊熱を放散させ、容器本体及びポリエチレン遮へい体を
冷却することができる。Further, since the polyethylene shield is supported via the spacing pieces radially arranged above and below the outer periphery of the container body, natural convection of air passing through the flow passage between the container body and the polyethylene shield is carried out. Thereby, the decay heat of the spent fuel can be dissipated, and the container body and the polyethylene shield can be cooled.
【００１０】[0010]
【実施例】図１の（Ａ）はこの発明の実施例による遮へ
い及び冷却装置を備えた使用済燃料輸送容器の平面図、
（Ｂ）は（Ａ）のＢ−Ｂ断面図である。図１（Ａ），
（Ｂ）において、図２と同じ部位は同じ符号を付しその
説明を省略する。本発明においては、ポリエチレン遮へ
い体３は容器本体２の外周の上下に放射状に配置された
間隔片６を介して支持され、容器本体２とポリエチレン
遮へい体３との間に空気の流通路７を設けた。使用済燃
料１から放出される崩壊熱は、容器本体２とポリエチレ
ン遮へい体３との間の流通路７に達し、流通路７内の空
気を加熱する。加熱された空気は上昇し自然対流が発生
する。その結果、流通路７内の空気は矢印の方向に周囲
を循環し、容器本体２とポリエチレン遮へい体３とを共
に冷却することができる。また、ポリエチレン遮へい体
３によって、容器内の使用済燃料１から放出される中性
子を遮へいすることができる。空気の循環を円滑にする
ため流通路７の出入口部のポリエチレン遮へい体３の形
状は圧力損失が小さくなるような工夫が望まれる。ま
た、間隔片６は容器本体２の外周に上下に放射状に取り
付け、空気の自然対流を助けるようにする。容器本体２
内の使用済燃料１の固定は固定治具４で行い、図１
（Ａ），（Ｂ）では使用済燃料１個の場合を示した、が
使用済燃料を４個収納することがある。1 (A) is a plan view of a spent fuel transportation container equipped with a shielding and cooling device according to an embodiment of the present invention.
(B) is a BB sectional view of (A). FIG. 1 (A),
In (B), the same parts as those in FIG. 2 are denoted by the same reference numerals, and the description thereof will be omitted. In the present invention, the polyethylene shield 3 is supported via the spacing pieces 6 arranged radially above and below the outer periphery of the container body 2, and the air flow passage 7 is provided between the container body 2 and the polyethylene shield 3. Provided. The decay heat released from the spent fuel 1 reaches the flow passage 7 between the container body 2 and the polyethylene shield 3, and heats the air in the flow passage 7. The heated air rises and natural convection occurs. As a result, the air in the flow passage 7 circulates in the direction of the arrow to cool the container body 2 and the polyethylene shield 3 together. Further, the polyethylene shield 3 can shield neutrons emitted from the spent fuel 1 in the container. In order to make the air circulation smooth, it is desirable that the shape of the polyethylene shield 3 at the inlet / outlet of the flow passage 7 be such that the pressure loss is small. Further, the spacing pieces 6 are vertically attached to the outer circumference of the container body 2 in a radial manner to assist natural convection of air. Container body 2
The spent fuel 1 in the inside is fixed by the fixing jig 4, and
(A) and (B) show the case of one spent fuel, but four spent fuels may be stored.
【００１１】[0011]
【発明の効果】この発明によれば、容器本体とポリエチ
レン遮へい体との間に空気の流通路を設けたので、容器
本体とポリエチレン遮へい体との間に空気が流通して、
使用済燃料から放出される崩壊熱を放散させ、容器本体
及びポリエチレン遮へい体を共に冷却することができ
る。従って、従来の輸送容器のごとく容器本体の周りの
ポリエチレン遮へい体に冷却フィンを備える必要がない
ので、輸送容器の構造を単純にすることができる。According to the present invention, since the air flow passage is provided between the container body and the polyethylene shield, air flows between the container body and the polyethylene shield,
It is possible to dissipate the decay heat released from the spent fuel and cool the container body and the polyethylene shield together. Therefore, unlike the conventional shipping container, it is not necessary to provide the cooling fins on the polyethylene shield around the container body, so that the structure of the shipping container can be simplified.
【図１】（Ａ）はこの発明の実施例による遮へい及び冷
却装置を備えた使用済燃料輸送容器の平面図、（Ｂ）は
（Ａ）のＢ−Ｂ断面図である。FIG. 1A is a plan view of a spent fuel transportation container equipped with a shielding and cooling device according to an embodiment of the present invention, and FIG. 1B is a sectional view taken along line BB of FIG.
【図２】従来の使用済燃料輸送容器の縦断面図である。FIG. 2 is a vertical sectional view of a conventional spent fuel transportation container.
１ 使用済燃料 ２ 容器本体 ３ ポリエチレン遮へい体 ４ 固定治具 ５ 冷却フィン ６ 間隔片 ７ 流通路 1 Spent fuel 2 Container body 3 Polyethylene shield 4 Fixing jig 5 Cooling fins 6 Spacing piece 7 Flow passage
Claims (2)
に円筒状の容器本体の外周にポリエチレン遮へい体を備
えた使用済燃料輸送容器において、前記容器本体と前記
ポリエチレン遮へい体との間に空気の流通路を設けたこ
とを特徴とする使用済燃料輸送容器の遮へい及び冷却装
置。Claim: What is claimed is: 1. A spent fuel transport container having a polyethylene shield on the outer periphery of a cylindrical container body for transporting or temporarily storing spent fuel, wherein air is provided between the container body and the polyethylene shield. A shielding and cooling device for a spent fuel transportation container, which is provided with a flow passage.
い及び冷却装置において、ポリエチレン遮へい体は容器
本体の外周に上下に放射状に配置された複数の間隔片を
介して支持されていることを特徴とする使用済燃料輸送
容器の遮へい及び冷却装置。2. The shielding and cooling device for a spent fuel transportation container according to claim 1, wherein the polyethylene shielding member is supported on the outer periphery of the container body via a plurality of vertically arranged space pieces. A shielding and cooling device for a spent fuel transportation container characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6202792A JPH0850196A (en) | 1994-08-04 | 1994-08-04 | Shielding and cooling device for spent fuel transporting vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6202792A JPH0850196A (en) | 1994-08-04 | 1994-08-04 | Shielding and cooling device for spent fuel transporting vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0850196A true JPH0850196A (en) | 1996-02-20 |
Family
ID=16463276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6202792A Pending JPH0850196A (en) | 1994-08-04 | 1994-08-04 | Shielding and cooling device for spent fuel transporting vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0850196A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002025670A1 (en) * | 2000-09-20 | 2002-03-28 | Hitachi, Ltd. | Container for nuclear fuel transportation |
| JP2009244045A (en) * | 2008-03-31 | 2009-10-22 | Japan Atom Power Co Ltd:The | Spent fuel container |
| JP2014109522A (en) * | 2012-12-03 | 2014-06-12 | Toshiba Corp | Hydrogen removal apparatus |
-
1994
- 1994-08-04 JP JP6202792A patent/JPH0850196A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002025670A1 (en) * | 2000-09-20 | 2002-03-28 | Hitachi, Ltd. | Container for nuclear fuel transportation |
| JP2009244045A (en) * | 2008-03-31 | 2009-10-22 | Japan Atom Power Co Ltd:The | Spent fuel container |
| JP2014109522A (en) * | 2012-12-03 | 2014-06-12 | Toshiba Corp | Hydrogen removal apparatus |
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