JPH11190799A - Canister for storing spent fuel - Google Patents
Canister for storing spent fuelInfo
- Publication number
- JPH11190799A JPH11190799A JP9359859A JP35985997A JPH11190799A JP H11190799 A JPH11190799 A JP H11190799A JP 9359859 A JP9359859 A JP 9359859A JP 35985997 A JP35985997 A JP 35985997A JP H11190799 A JPH11190799 A JP H11190799A
- Authority
- JP
- Japan
- Prior art keywords
- canister
- spent fuel
- canister body
- upper flange
- fuel storage
- 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.)
- Withdrawn
Links
Landscapes
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、原子炉で使用され
た使用済燃料を通風冷却式の使用済燃料貯蔵施設に貯蔵
保管する場合に用いられる使用済燃料貯蔵用キャニスタ
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spent fuel storage canister used for storing spent fuel used in a nuclear reactor in a ventilated cooling type spent fuel storage facility.
【０００２】[0002]
【従来の技術】原子炉から取り出した使用済燃料を収容
する容器として、図５及び図６に示すような使用済燃料
貯蔵用キャニスタ１が知られている。この使用済燃料貯
蔵用キャニスタ１は有底円筒状のキャニスタ本体２と、
このキャニスタ本体２の開口部を閉塞するキャニスタ蓋
３とからなり、キャニスタ本体２の内部には使用済燃料
４を鉛直に支持するための使用済燃料支持ラック５が設
けられている。キャニスタ蓋３は排水用バルブ６を有す
る内蓋３ａと、この内蓋３ａの上面に載置される外蓋３
ｂとで構成されており、これらの内蓋３ａ及び外蓋３ｂ
は複数本のボルト７によってキャニスタ本体２の外周面
に形成された上部フランジ８に締め付け固定されるよう
になっている。2. Description of the Related Art As a container for storing spent fuel taken out of a nuclear reactor, a canister 1 for storing spent fuel as shown in FIGS. 5 and 6 is known. The canister 1 for storing spent fuel comprises a canister body 2 having a cylindrical shape with a bottom,
A canister cover 3 for closing the opening of the canister body 2 is provided with a spent fuel support rack 5 for vertically supporting a spent fuel 4 inside the canister body 2. The canister lid 3 includes an inner lid 3a having a drain valve 6 and an outer lid 3 mounted on the upper surface of the inner lid 3a.
b, and these inner lid 3a and outer lid 3b
Is fixed to an upper flange 8 formed on the outer peripheral surface of the canister body 2 by a plurality of bolts 7.
【０００３】ところで、このような使用済燃料貯蔵用キ
ャニスタ１は、図４に示すような構造の使用済燃料貯蔵
施設９内に使用済燃料４と共に長期保管され、保管期間
中は使用済燃料４の崩壊熱を除去するために使用済燃料
貯蔵施設９の通風路１０内を下方から上方へ通風する冷
却空気１３によって冷却される。また、キャニスタ１の
上部と下部には使用済燃料４からの放射線を遮蔽するた
めにコンクリートからなる上部遮蔽体１１と下部遮蔽体
１２が配置される。The spent fuel storage canister 1 is stored together with the spent fuel 4 in a spent fuel storage facility 9 having a structure as shown in FIG. 4, and the spent fuel 4 is stored during the storage period. In order to remove the decay heat of the spent fuel storage facility 9, it is cooled by cooling air 13 that flows through the ventilation path 10 of the spent fuel storage facility 9 from below to above. An upper shield 11 and a lower shield 12 made of concrete are arranged on the upper and lower portions of the canister 1 to shield radiation from the spent fuel 4.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述し
た従来の使用済燃料貯蔵用キャニスタ１では冷却空気１
３が上部フランジ８の下面に当たり、この部分で冷却空
気１３の圧力損失が生じるため、冷却空気１３の冷却効
果を大きく低下させる惧れがあった。However, in the conventional spent fuel storage canister 1 described above, the cooling air 1
3 hits the lower surface of the upper flange 8, and the pressure loss of the cooling air 13 occurs in this portion, so that there is a fear that the cooling effect of the cooling air 13 is greatly reduced.
【０００５】本発明は上記の問題点に鑑みてなされたも
ので、使用済燃料貯蔵施設の通風路内を通風する冷却空
気の冷却効果を高めることのできる使用済燃料貯蔵用キ
ャニスタを提供することを目的とする。The present invention has been made in view of the above problems, and an object of the present invention is to provide a canister for storing spent fuel which can enhance a cooling effect of cooling air flowing through a ventilation path of a spent fuel storage facility. With the goal.
【０００６】[0006]
【課題を解決するための手段】かかる目的を達成するた
めに、請求項１の発明は、外周面に上部フランジを有す
るキャニスタ本体と、このキャニスタ本体の前記上部フ
ランジにボルト接合されるキャニスタ蓋とを具備してな
り、通風冷却式の使用済燃料貯蔵施設に貯蔵保管される
使用済燃料貯蔵用キャニスタにおいて、前記上部フラン
ジの下面を前記キャニスタ本体の底部に向かって縮径す
る円錘面若しくはそれに類似した面としたことを特徴と
する。In order to achieve the above object, according to the present invention, there is provided a canister body having an upper flange on an outer peripheral surface, and a canister lid bolted to the upper flange of the canister body. In the spent fuel storage canister that is stored and stored in the ventilated cooled spent fuel storage facility, the conical surface or the conical surface that reduces the lower surface of the upper flange toward the bottom of the canister body It is characterized by having a similar surface.
【０００７】[0007]
【発明の実施の形態】以下、本発明の一実施形態を図１
乃至図３に基づいて説明する。図１は本発明の一実施形
態に係る使用済燃料貯蔵用キャニスタの縦断面図であっ
て、図中１５は本発明の一実施形態に係る使用済燃料貯
蔵用キャニスタを示している。この使用済燃料貯蔵用キ
ャニスタ１５は有底円筒状のキャニスタ本体１６と、キ
ャニスタ本体１６の開口部を閉塞するキャニスタ蓋１７
とからなり、キャニスタ本体１６の内部には、使用済燃
料４を鉛直に支持するための使用済燃料支持ラック１８
が設けられている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. FIG. 1 is a longitudinal sectional view of a spent fuel storage canister according to one embodiment of the present invention. In FIG. 1, reference numeral 15 denotes a spent fuel storage canister according to one embodiment of the present invention. The spent fuel storage canister 15 includes a cylindrical canister body 16 having a bottom and a canister lid 17 for closing an opening of the canister body 16.
A spent fuel support rack 18 for vertically supporting the spent fuel 4 is provided inside the canister body 16.
Is provided.
【０００８】キャニスタ体１７は排水用バルブ１９を有
する内蓋１７ａと、この内蓋１７ａの上面に載置される
外蓋１７ｂとで構成されており、これらの内蓋１７ａ及
び外蓋１７ｂは複数本のボルト２０によってキャニスタ
本体１６の外周面に形成された上部フランジ２１に締め
付け固定されるようになっている。The canister body 17 comprises an inner lid 17a having a drain valve 19 and an outer lid 17b mounted on the upper surface of the inner lid 17a. The inner lid 17a and the outer lid 17b are provided in plural numbers. The bolt 20 tightens and fixes the upper flange 21 formed on the outer peripheral surface of the canister body 16.
【０００９】上部フランジ２１はキャニスタ本体１６と
一体に形成されており、その下面が円錘面２１ａとなっ
ている。この円錘面２１ａはキャニスタ本体１６の底部
に向かって緩やかに縮径しており、その縮径角度θはθ
＝１０°〜１５°となっている。The upper flange 21 is formed integrally with the canister body 16, and the lower surface thereof is a conical surface 21a. The diameter of the conical surface 21a is gradually reduced toward the bottom of the canister body 16, and the reduced diameter θ is θ.
= 10 ° to 15 °.
【００１０】なお、キャニスタ本体１６は円錘面２１ａ
を有する円筒部と円錘面２１ａを持たない円筒部とを分
けて製作した後、両者を全周にわたって完全溶け込み溶
接することで製作でき、この場合の溶接継手は図２に示
すように溶接後、完全に溶けてしまう程度の小さな嵌め
合い形状にすることで円錘面２１ａを有する円筒部と円
錘面２１ａを有しない円筒部との寸法に若干の差が生じ
ていても、完成後のキャニスタの強度に何ら影響を及ぼ
さない溶接が可能である。The canister body 16 has a conical surface 21a.
And a cylindrical portion having no conical surface 21a can be manufactured by separately forming the cylindrical portion and then completely penetrating and welding the entire circumference thereof. In this case, the welded joint is formed by welding as shown in FIG. Even if there is a slight difference in dimensions between the cylindrical portion having the conical surface 21a and the cylindrical portion having no conical surface 21a by making the fitting shape small enough to completely melt, Welding that does not affect the strength of the canister is possible.
【００１１】図３は本発明の一実施形態に係る使用済燃
料貯蔵用キャニスタ１５を使用済燃料貯蔵施設９の通風
路１０に配置したときの冷却空気１３の流れを示す図で
あって、同図に示すように、上部フランジ２１の下面を
キャニスタ本体１６の底部に向かって縮径する円錘面２
１ａとしたことにより、冷却空気１３の流れが滑らかな
流れとなる。FIG. 3 is a view showing the flow of cooling air 13 when the spent fuel storage canister 15 according to one embodiment of the present invention is disposed in the ventilation passage 10 of the spent fuel storage facility 9. As shown in the figure, a conical surface 2 that reduces the diameter of the lower surface of the upper flange 21 toward the bottom of the canister body 16
By setting 1a, the flow of the cooling air 13 becomes a smooth flow.
【００１２】したがって、上述した実施形態では使用済
燃料貯蔵施設９の通風路１０内を通風する冷却空気１３
が上部フランジ２１の下面に当たって圧力損失を生じる
ことがないため、冷却空気１３の冷却効果を高めること
ができる。Therefore, in the embodiment described above, the cooling air 13 that flows through the ventilation passage 10 of the spent fuel storage facility 9
Does not hit the lower surface of the upper flange 21 to cause a pressure loss, so that the cooling effect of the cooling air 13 can be enhanced.
【００１３】なお、上述した実施形態では上部フランジ
２１の下面をキャニスタ本体１６の底部に向かって縮径
する円錘面２１ａとしたが、例えば円錘に近い円弧面と
しても良い。In the above-described embodiment, the lower surface of the upper flange 21 is the conical surface 21a whose diameter is reduced toward the bottom of the canister body 16, but may be, for example, an arc surface close to the conical shape.
【００１４】[0014]
【発明の効果】以上説明したように、本発明によれば、
使用済燃料貯蔵施設の通風路内を通風する冷却空気の冷
却効果を高めることのできる使用済燃料貯蔵用キャニス
タを提供できる。As described above, according to the present invention,
A canister for storing spent fuel that can enhance the cooling effect of cooling air that flows through the ventilation path of the spent fuel storage facility can be provided.
【図１】本発明の一実施形態に係る使用済燃料貯蔵用キ
ャニスタの縦断面図である。FIG. 1 is a longitudinal sectional view of a canister for storing spent fuel according to an embodiment of the present invention.
【図２】図１に示すＡ部の拡大図である。FIG. 2 is an enlarged view of a portion A shown in FIG.
【図３】本発明の一実施形態に係る使用済燃料貯蔵用キ
ャニスタを使用済燃料貯蔵施設の通風路に配置したとき
の冷却空気の流れを示す図である。FIG. 3 is a diagram showing a flow of cooling air when a spent fuel storage canister according to one embodiment of the present invention is arranged in a ventilation path of a spent fuel storage facility.
【図４】使用済燃料貯蔵施設の縦断面図である。FIG. 4 is a longitudinal sectional view of a spent fuel storage facility.
【図５】従来の使用済燃料貯蔵用キャニスタの縦断面図
である。FIG. 5 is a longitudinal sectional view of a conventional spent fuel storage canister.
【図６】図５の線Ｂ−Ｂに沿う断面図である。FIG. 6 is a sectional view taken along line BB in FIG. 5;
４ 使用済燃料 ９ 使用済燃料貯蔵施設 １０ 通風路 １３ 冷却空気 １６ キャニスタ本体 １７ キャニスタ蓋 ２１ 上部フランジ ２１ａ 円錘面 Reference Signs List 4 Spent fuel 9 Spent fuel storage facility 10 Ventilation path 13 Cooling air 16 Canister body 17 Canister lid 21 Upper flange 21a Conical surface
Claims (1)
タ本体と、このキャニスタ本体の前記上部フランジにボ
ルト接合されるキャニスタ蓋とを具備してなり、通風冷
却式の使用済燃料貯蔵施設に貯蔵保管される使用済燃料
貯蔵用キャニスタにおいて、 前記上部フランジの下面を前記キャニスタ本体の底部に
向かって縮径する円錘面若しくはそれに類似した面とし
たことを特徴とする使用済燃料貯蔵用キャニスタ。1. A canister body having an upper flange on an outer peripheral surface, and a canister lid bolted to the upper flange of the canister body. The canister lid is stored and stored in a ventilated cooling type spent fuel storage facility. A canister for storing spent fuel, wherein the lower surface of the upper flange is a conical surface or a surface similar to the conical surface that decreases in diameter toward the bottom of the canister body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9359859A JPH11190799A (en) | 1997-12-26 | 1997-12-26 | Canister for storing spent fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9359859A JPH11190799A (en) | 1997-12-26 | 1997-12-26 | Canister for storing spent fuel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11190799A true JPH11190799A (en) | 1999-07-13 |
Family
ID=18466671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9359859A Withdrawn JPH11190799A (en) | 1997-12-26 | 1997-12-26 | Canister for storing spent fuel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11190799A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100666886B1 (en) * | 2001-06-29 | 2007-01-10 | 미츠비시 쥬고교 가부시키가이샤 | Closed vessel for radioactive substance, seal-welding method for closed vessel, and exhaust system used for seal-welding method |
| EP1849163A2 (en) * | 2005-02-11 | 2007-10-31 | Holtec International, Inc. | Manifold system for the ventilated storage of high level waste and a method of using the same to store high level waste in a below-grade environment |
| US8718220B2 (en) | 2005-02-11 | 2014-05-06 | Holtec International, Inc. | Manifold system for the ventilated storage of high level waste and a method of using the same to store high level waste in a below-grade environment |
| US9001958B2 (en) | 2010-04-21 | 2015-04-07 | Holtec International, Inc. | System and method for reclaiming energy from heat emanating from spent nuclear fuel |
| US10332642B2 (en) | 2009-05-06 | 2019-06-25 | Holtec International | Apparatus for storing and/or transporting high level radioactive waste, and method for manufacturing the same |
| US11569001B2 (en) | 2008-04-29 | 2023-01-31 | Holtec International | Autonomous self-powered system for removing thermal energy from pools of liquid heated by radioactive materials |
-
1997
- 1997-12-26 JP JP9359859A patent/JPH11190799A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100666886B1 (en) * | 2001-06-29 | 2007-01-10 | 미츠비시 쥬고교 가부시키가이샤 | Closed vessel for radioactive substance, seal-welding method for closed vessel, and exhaust system used for seal-welding method |
| EP1849163A2 (en) * | 2005-02-11 | 2007-10-31 | Holtec International, Inc. | Manifold system for the ventilated storage of high level waste and a method of using the same to store high level waste in a below-grade environment |
| EP1849163A4 (en) * | 2005-02-11 | 2012-06-13 | Holtec International Inc | Manifold system for the ventilated storage of high level waste and a method of using the same to store high level waste in a below-grade environment |
| US8718220B2 (en) | 2005-02-11 | 2014-05-06 | Holtec International, Inc. | Manifold system for the ventilated storage of high level waste and a method of using the same to store high level waste in a below-grade environment |
| US10614924B2 (en) | 2005-02-11 | 2020-04-07 | Holtec International | Manifold system for the ventilated storage of high level waste and a method of using the same to store high level waste in a below-grade environment |
| US11264142B2 (en) | 2005-02-11 | 2022-03-01 | Holtec International | Manifold system for the ventilated storage of high level waste and a method of using the same to store high level waste in a below-grade environment |
| US11569001B2 (en) | 2008-04-29 | 2023-01-31 | Holtec International | Autonomous self-powered system for removing thermal energy from pools of liquid heated by radioactive materials |
| US10332642B2 (en) | 2009-05-06 | 2019-06-25 | Holtec International | Apparatus for storing and/or transporting high level radioactive waste, and method for manufacturing the same |
| US9001958B2 (en) | 2010-04-21 | 2015-04-07 | Holtec International, Inc. | System and method for reclaiming energy from heat emanating from spent nuclear fuel |
| US10418136B2 (en) | 2010-04-21 | 2019-09-17 | Holtec International | System and method for reclaiming energy from heat emanating from spent nuclear fuel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20050301 |