JPH0738033B2 - Shield plate for nuclear fusion device - Google Patents
Shield plate for nuclear fusion deviceInfo
- Publication number
- JPH0738033B2 JPH0738033B2 JP61242250A JP24225086A JPH0738033B2 JP H0738033 B2 JPH0738033 B2 JP H0738033B2 JP 61242250 A JP61242250 A JP 61242250A JP 24225086 A JP24225086 A JP 24225086A JP H0738033 B2 JPH0738033 B2 JP H0738033B2
- Authority
- JP
- Japan
- Prior art keywords
- shield plate
- divided
- plate
- fusion device
- shaping
- 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
Links
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、超電導コイルとプラズマ容器間を遮断するシ
ールド板がトーラスの周方向に複数に分割され、かつ各
分割端部に渦電流の流れ方向と直交方向にスリツトが形
成されている核融合装置用シールド板に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is directed to a shield plate for blocking between a superconducting coil and a plasma vessel, which is divided into a plurality of pieces in the circumferential direction of a torus, and eddy current flows at each divided end. The present invention relates to a shield plate for a nuclear fusion device in which a slit is formed in a direction orthogonal to the direction.
核融合装置用の超電導コイルは、極低温（例えば、−26
9℃）に冷却保持する必要があり、その周囲から熱が侵
入しないように、該超電導コイルの周囲にはシールド板
が設置されている。このシールド板は、一般的に銅また
はアルミニウム等の熱の良導体が用いられ、外部より侵
入した熱をこれで受け止め、予めこのシールド板に固着
された配管内を流入する液体窒素等の冷媒により外部へ
排熱するようになつている。また、このシールド板の周
囲には、プラズマを制御するための各種コイルが配設さ
れているため、この各種コイルから発生する定常磁場お
よび変動磁場があり、当該シールド板には渦電流が流
れ、電磁力が生ずる。この電磁力に耐え得る強度を有す
るシールド板を形成するためには、シールド板の板厚を
増大させればよいが、反面冷却効果が低下することにな
るため、通常は電磁力の軽減対策を講じ、シールド板の
板厚は増大させず、１〜2mmに抑えている。この電磁力
の軽減対策は、例えば特願昭58−188302号（特開昭60−
80787号公報）に記載されているように、シールド板を
トーラスの周方向に複数個に分割し、分割端部間を電気
的な絶縁物を介在することにより絶縁し、この分割によ
り渦電流を低減し、電磁力を軽減する構造が採られてい
る。さらに、シールド板を分割する際、その分割数に制
限がある場合に対処するため、あるいは電磁力をさらに
軽減するために、前記分割端部に渦電流の流れる方向と
直交方向にスリツトが形成されている。A superconducting coil for a fusion device has a cryogenic temperature (for example, -26
It is necessary to keep it cooled to 9 ° C., and a shield plate is installed around the superconducting coil so that heat does not enter from the surroundings. This shield plate is generally made of a good conductor of heat such as copper or aluminum. It receives heat that has entered from the outside and uses a refrigerant such as liquid nitrogen that flows into the pipe that is fixed to this shield plate to the outside. It is designed to exhaust heat to. Further, since various coils for controlling plasma are arranged around the shield plate, there are a stationary magnetic field and a varying magnetic field generated from the various coils, and an eddy current flows in the shield plate, Electromagnetic force is generated. In order to form a shield plate having a strength that can withstand this electromagnetic force, it is sufficient to increase the plate thickness of the shield plate, but on the other hand, the cooling effect will decrease. Taken, the thickness of the shield plate is not increased and is kept to 1 to 2 mm. For example, Japanese Patent Application No. 58-188302 (Japanese Patent Application Laid-Open No. 60-
As described in (Japanese Patent No. 80787), the shield plate is divided into a plurality of pieces in the circumferential direction of the torus, and the divided end portions are insulated by interposing an electrical insulator between them, and this division produces an eddy current. The structure is adopted to reduce the electromagnetic force. Further, when the shield plate is divided, in order to deal with the case where the number of divisions is limited or to further reduce the electromagnetic force, a slit is formed at the divided end portion in a direction orthogonal to the eddy current flowing direction. ing.
以下、従来例を図面により具体的に説明する。第３図
は、トロイダルコイルを超電導化した該融合装置の縦断
面図を示すものである。プラズマ１は、真空のプラズマ
容器２の内部に収納され、プラズマ容器２の外側には、
プラズマ１の位置を制御するためのポロイダルコイル３
が配設され、さらにその外周側には、プラズマ１をプラ
ズマ容器２内に安定に閉じ込めるための超電導化を図つ
たトロイダルコイル、すなわち超電導コイル４が配設さ
れている。ここで、プラズマ容器２およびポロイダルコ
イル３は常温状態であり、極低温の超電導コイル４との
間には、温度差が約300度もある。そこで、これら常温
状態の部品からの輻射による超電導コイル４への熱侵入
を低減するために、シールド板５が設置されている。こ
のシールド板５には、液体窒素等の冷媒を流入させるた
めの冷却配管６が設置されている。Hereinafter, a conventional example will be specifically described with reference to the drawings. FIG. 3 is a longitudinal sectional view of the fusion device in which the toroidal coil is made superconducting. The plasma 1 is housed inside a vacuum plasma container 2, and outside the plasma container 2,
Poloidal coil 3 for controlling the position of plasma 1
Is disposed on the outer peripheral side thereof, and a toroidal coil for superconducting the plasma 1 to stably confine the plasma 1 in the plasma container 2, that is, a superconducting coil 4 is disposed. Here, the plasma container 2 and the poloidal coil 3 are in a normal temperature state, and a temperature difference between the plasma container 2 and the poloidal coil 3 is about 300 degrees with respect to the cryogenic superconducting coil 4. Therefore, in order to reduce heat invasion into the superconducting coil 4 due to radiation from these components in the room temperature state, the shield plate 5 is installed. The shield plate 5 is provided with a cooling pipe 6 for introducing a refrigerant such as liquid nitrogen.
一方、シールド板５の周囲には、各種コイル７より発生
する定常磁場および変動磁場があり、シールド板５に
は、これらの磁場により渦電流が流れる。第４図は、シ
ールド板５の部分拡大図であり、前記の渦電流を軽減す
るために、該シールド板５はトーラスの周方向に分割さ
れ、かつ分割された部分にスリツト８が設けられてい
る。この分割端部5a間は、絶縁物９により電気的に絶縁
されている。On the other hand, around the shield plate 5, there are a stationary magnetic field and a varying magnetic field generated by various coils 7, and an eddy current flows through the shield plate 5 due to these magnetic fields. FIG. 4 is a partially enlarged view of the shield plate 5. In order to reduce the eddy current, the shield plate 5 is divided in the circumferential direction of the torus, and slits 8 are provided at the divided portions. There is. The divided ends 5a are electrically insulated by an insulator 9.
ところが、第５図に示したごとく、スリツト８を設ける
ことにより、シールド板５の分割端部5aは、二点鎖線に
示すように、シールド板５の面と非面−な形状に変形す
る。すなわち、シールド板５を複数個に分割し、スリツ
ト８を設ける構造とした場合、シールド板５は３次元に
曲げ成形されているため、スリツト８を設けることによ
り、シールド板５の残留応力が解放され、それに伴つて
大きく変形する。However, as shown in FIG. 5, by providing the slit 8, the divided end portion 5a of the shield plate 5 is deformed into a shape that is not a surface with the surface of the shield plate 5 as shown by the chain double-dashed line. That is, when the shield plate 5 is divided into a plurality of pieces and the slit 8 is provided, since the shield plate 5 is three-dimensionally bent, the provision of the slit 8 releases the residual stress of the shield plate 5. And is greatly deformed accordingly.
ところが、一般にシールド板５と超電導コイル４との間
隙は、２〜4mmと極めて小さい。したがつて、前記変形
によつて、シールド板５の分割端部5aが超電導コイル４
に接触するおそれがある。しかし、シールド板６と超電
導コイル４間は、温度差が約100度もあるため、シール
ド板５からの熱が超電導コイル４に伝達され、該超電導
コイル４は昇温し、超電導状態が保持できず、運転中止
という重大な事故の原因となる問題があつた。However, in general, the gap between the shield plate 5 and the superconducting coil 4 is extremely small at 2 to 4 mm. Therefore, according to the above-mentioned deformation, the divided end portion 5a of the shield plate 5 is changed to the superconducting coil 4
May come into contact with. However, since the temperature difference between the shield plate 6 and the superconducting coil 4 is about 100 degrees, the heat from the shield plate 5 is transferred to the superconducting coil 4, the superconducting coil 4 is heated, and the superconducting state can be maintained. However, there was a problem that caused a serious accident of stopping the operation.
本発明の目的は、シールド板の分割端部が超電導コイル
と接触するおそれが少なく、しかも渦電流に基づく電磁
力が大きくならない核融合装置用シールド板を提供せん
とするものである。An object of the present invention is to provide a shield plate for a nuclear fusion device in which there is little risk that the divided ends of the shield plate will come into contact with the superconducting coil and the electromagnetic force based on eddy current does not increase.
本発明は、シールド板の分割端部に該シールド板より電
気抵抗が大きくかつ非磁性材であるステンレス鋼板（SU
S）、耐熱鋼（SUH）又はインコネル等の金属より成る整
形板を設けるとともに、該整形板をリベットにて分割端
部の前記スリットで分割された各部分に固定して当該分
割端部を面一に規制したことにより、金属より成る整形
板の高い剛性と前記リベットによるスリットで分割され
た各部分毎の固定によって、シールド板のスリット部分
の変形を高い機械的強度をもって矯正できるようにし、
もって、超電導コイルとの接触を防止し、該整形板をシ
ールド板より電圧抵抗が大きく、かつ非磁性材にて形成
することにより、渦電流に基づく電磁力が大きくならな
いようにしたものである。The present invention relates to a stainless steel plate (SU) which is a non-magnetic material and has a larger electric resistance than the shield plate at the divided ends of the shield plate.
S), heat-resistant steel (SUH) or Inconel or other metal shaping plate is provided, and the shaping plate is fixed to each part of the split end divided by the slit with rivets, and the split end is faced. By restricting to one, by fixing the high rigidity of the shaping plate made of metal and each part divided by the slit by the rivet, it is possible to correct the deformation of the slit part of the shield plate with high mechanical strength,
Therefore, by preventing the contact with the superconducting coil and forming the shaping plate with a voltage resistance higher than that of the shield plate and by using a non-magnetic material, the electromagnetic force based on the eddy current is prevented from increasing.
第１図は、本発明の一実施例を示すシールド板の要部拡
大図であり、シールド板５のスリツト８部分に分割端部
5aを面一に規制する整形板10が設けられている。該整形
板10は、分割端部5aが変形して超電導コイル４と接触し
ないようにするものであり、各分割端部5a毎に整形板10
を設けてもよいが、本実施例のごとく、対向する分割端
部間に一つの整形板10を跨設すると、部品点数の削減お
よび組立作業の効率化を図ることができる。この整形板
10は、リベツト11によりシールド板５の分割端部5aのス
リツト８で分割された各部分に固定されている。このよ
うに、金属より成る整形板を分割端部のスリットで分割
された各部分すべてに、リベットにより固定したので、
シールド板のスリット部分の変形を高い機械的強度をも
って矯正できる。なお、分割端部5aをシールド板５の表
裏両面より挟持してもよく、この挟持構造にすれば、リ
ベツト11の数を減少させることができる。FIG. 1 is an enlarged view of a main part of a shield plate showing an embodiment of the present invention, in which the slit 8 portion of the shield plate 5 is divided into end portions.
A shaping plate 10 that regulates the surface 5a flush is provided. The shaping plate 10 is for preventing the divided end portion 5a from being deformed and coming into contact with the superconducting coil 4, and the shaping plate 10 is provided for each divided end portion 5a.
However, if one shaping plate 10 is laid across the divided end portions facing each other as in this embodiment, the number of parts can be reduced and the efficiency of the assembling work can be improved. This shaping board
Numeral 10 is fixed to each part divided by slit 8 of divided end portion 5a of shield plate 5 by rivet 11. In this way, since the shaping plate made of metal was fixed with rivets to all the parts divided by the slits at the dividing ends,
Deformation of the slit part of the shield plate can be corrected with high mechanical strength. The split end 5a may be sandwiched between the front and back surfaces of the shield plate 5, and this sandwiching structure can reduce the number of rivets 11.
整形板10は、シールド板５の素材より電気抵抗が大き
く、かつ非磁性の素材で形成されている。これにより、
スリツト８により渦電流の低減を図つた状態が維持され
るようになつている。この整形板10の素材として、具体
的には、SUS,SUHおよびインコネル材等がある。The shaping plate 10 is made of a non-magnetic material having a larger electric resistance than the material of the shield plate 5. This allows
The slit 8 maintains a state in which the eddy current is reduced. Specific examples of the material of the shaping plate 10 include SUS, SUH, and Inconel material.
次に、作用を説明する。シールド板５の分割端部5aは整
形板10により面一規制されて、その変形が防止されるた
め、従来のように超電導コイル４と接触するおそれが少
ない。シールド板５の形状が核融合装置の違いにより異
なつても、同様に規制でき、その変形が防止できる。ま
た、該整形板10がシールド板５より電気抵抗が大きく、
かつ非磁性材により形成されているため、各スリツト８
部分は構造的には連通されるが、電磁気的にはスリツト
８の渦電流低減機能が維持され、電磁力は大きくならな
い。Next, the operation will be described. Since the split end 5a of the shield plate 5 is flush-regulated by the shaping plate 10 and its deformation is prevented, there is little risk of contacting the superconducting coil 4 as in the conventional case. Even if the shape of the shield plate 5 is different due to the difference in the nuclear fusion device, it can be similarly regulated and its deformation can be prevented. Further, the shaping plate 10 has a larger electric resistance than the shield plate 5,
In addition, each slit 8 is made of non-magnetic material.
Although the parts are structurally connected, electromagnetically, the eddy current reducing function of the slit 8 is maintained, and the electromagnetic force does not increase.
本発明によれば、金属より成る整形板をシールド板の分
割端部のスリツトで分割された各部分すべてに、リベッ
トにより固定したので、整形板によつてシールド板の分
割端部の変形を防止できるため、該分割端部が超電導コ
イルに接触するおそれを少なくすることができる。しか
も、整形板をシールド板より電気抵抗が大きく、かつ非
磁性材にて形成したため、スリツト部分に設けても、渦
電流は小さく維持でき、したがつて電磁力も小さく維持
できる。According to the present invention, since the shaping plate made of metal is fixed by rivets to all the parts divided by the slits of the dividing end of the shield plate, the shaping plate prevents deformation of the dividing end of the shield plate. Therefore, it is possible to reduce the risk of the divided end portion coming into contact with the superconducting coil. Moreover, since the shaping plate has a larger electric resistance than the shield plate and is made of a non-magnetic material, the eddy current can be kept small even when it is provided in the slit portion, and therefore the electromagnetic force can be kept small.
第１図は本発明の一実施例を示すシールド板の要部拡大
図、第２図は第１図のII−II線断面図、第３図は従来の
核融合装置の縦断面図、第４図は従来のシールド板の部
分拡大図、第５図は第４図のＶ−Ｖ線断面図を示す。 ２…プラズマ容器、４…超電導コイル、5a…分割端部、
５…シールド板、８…スリツト、10…整形板。FIG. 1 is an enlarged view of a main part of a shield plate showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a longitudinal sectional view of a conventional fusion device. FIG. 4 is a partially enlarged view of a conventional shield plate, and FIG. 5 is a sectional view taken along line VV of FIG. 2 ... Plasma container, 4 ... Superconducting coil, 5a ... Split end,
5 ... shield plate, 8 ... slit, 10 ... shaping plate.
Claims (2)
シールド板がトーラスの周方向に複数に分割されかつ分
割端部に渦電流の流れ方向と直交方向にスリットが複数
形成されている核融合装置用シールド板において、前記
分割端部にシールド板より電気抵抗が大きくかつ非磁性
材であるステンレス鋼（SUS）、耐熱鋼（SUH）又はイン
コネル等の金属より成る整形板を設けるとともに、該整
形板をリベットにて分割端部の前記スリットで分割され
た各部分に固定して当該分割端部を面一に規制したこと
を特徴とする核融合装置用シールド板。1. A fusion device in which a shield plate for blocking between a superconducting coil and a plasma container is divided into a plurality of pieces in the circumferential direction of a torus, and a plurality of slits are formed at the divided ends in a direction orthogonal to the eddy current flow direction. In the shield plate for use, a shaping plate made of a metal such as stainless steel (SUS), heat resistant steel (SUH) or Inconel, which is a non-magnetic material having a larger electric resistance than the shielding plate, is provided at the split end, and the shaping plate is provided. Is fixed to each part divided by the slit of the divided end with a rivet, and the divided end is regulated so as to be flush with each other.
シールド板の対向する分割端部間に跨設した核融合装置
用シールド板。2. A shield plate for a nuclear fusion device according to claim 1, wherein a shaping plate is provided so as to straddle between opposing divided ends of the shield plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61242250A JPH0738033B2 (en) | 1986-10-13 | 1986-10-13 | Shield plate for nuclear fusion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61242250A JPH0738033B2 (en) | 1986-10-13 | 1986-10-13 | Shield plate for nuclear fusion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6395385A JPS6395385A (en) | 1988-04-26 |
| JPH0738033B2 true JPH0738033B2 (en) | 1995-04-26 |
Family
ID=17086476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61242250A Expired - Lifetime JPH0738033B2 (en) | 1986-10-13 | 1986-10-13 | Shield plate for nuclear fusion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0738033B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015002287A (en) * | 2013-06-17 | 2015-01-05 | 住友重機械工業株式会社 | Superconducting magnet |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5643096U (en) * | 1979-09-10 | 1981-04-20 | ||
| JPS6080787A (en) * | 1983-10-11 | 1985-05-08 | 株式会社日立製作所 | Torus-shaped fusion device |
-
1986
- 1986-10-13 JP JP61242250A patent/JPH0738033B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6395385A (en) | 1988-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0681189B1 (en) | Superconducting gradient coil shields in magnetic resonance imaging magnets | |
| CN108878053B (en) | Superconducting lead assembly, cryogenic system, and method of mounting superconducting lead assembly in a cryogenic system | |
| US4263096A (en) | Toroidal magnet system | |
| US4833434A (en) | Superconducting electromagnet for NMR imaging | |
| WO2023042644A1 (en) | Superconducting magnet device and radiation shield structure | |
| JPH0738033B2 (en) | Shield plate for nuclear fusion device | |
| JPH0722231A (en) | Superconducting magnet for MRI equipment | |
| EP3608929B1 (en) | A directly coolable multifilament conductor means | |
| CN106711132B (en) | power semiconductor device | |
| JP6388789B2 (en) | Superconducting electromagnet | |
| JPH01313882A (en) | A device for protecting the electrodes of an electromagnetic induction device and an electromagnetic induction device equipped with this device | |
| JP2539121B2 (en) | Superconducting magnet | |
| JP6651878B2 (en) | Vacuum valve | |
| EP0099408B1 (en) | Composite coils for toroidal field coils and method of using same | |
| JP3418862B2 (en) | Radiation shield plate | |
| JP2587156B2 (en) | Induction heating coil | |
| JP2602917B2 (en) | Heat shield plate for superconducting magnet | |
| JP3636484B2 (en) | Electromagnetic cooker | |
| JP3263764B2 (en) | Superconducting magnet device | |
| JPS6337909B2 (en) | ||
| JP2739159B2 (en) | Toroidal magnet | |
| JPH0622168B2 (en) | Radiant shield | |
| JPH0570921B2 (en) | ||
| JPH08136679A (en) | Fusion device diverter | |
| JPH04576B2 (en) |