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- Withdrawn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 |