JPH0315795A - Nuclear fusion blanket - Google Patents

Nuclear fusion blanket

Info

Publication number
JPH0315795A
JPH0315795A JP1149325A JP14932589A JPH0315795A JP H0315795 A JPH0315795 A JP H0315795A JP 1149325 A JP1149325 A JP 1149325A JP 14932589 A JP14932589 A JP 14932589A JP H0315795 A JPH0315795 A JP H0315795A
Authority
JP
Japan
Prior art keywords
temp
bleeder
control layer
blanket
nuclear fusion
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
Application number
JP1149325A
Other languages
Japanese (ja)
Inventor
Hidetaka Jo
定 秀隆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP1149325A priority Critical patent/JPH0315795A/en
Publication of JPH0315795A publication Critical patent/JPH0315795A/en
Pending legal-status Critical Current

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Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/10Nuclear fusion reactors

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  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

PURPOSE:To enhance a cushion property so that the space for a temp. control layer can be reduced and the regulation of the heat between a structural material and a cooling pipe is facilitated by using ceramic fibers for the temp. control layer. CONSTITUTION:The blanket of a nuclear fusion reactor converts and recovers nuclear fusion energy to thermal energy and recovers tritium produced. There is a need for controlling the temp. in the tritium bleeder for the characteristics that the fluctuating heat is generated therein. The temp. of the cooling pipe 2 is, therefore, required to be kept at a prescribed temp. and the temp. of a shell 3, partition plate 4, etc., at the above-mentioned temp. or below. The temp. control layer 5 of the ceramic fibers 6 is installed between the bleeder 1 and the cooling tube 2 or the shell 3 and the partition plate 4. The fibers 6 act as the cushion to a dimensional change and oscillation and have more than a required high-temp. resistant characteristic, high stability to high radiations, compatibility with a dimensional change and oscillation, etc. The required space is small and the thermal conductivity is adjustable. The practicability of the blanket is enhanced in this way.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は固体トリチウム・ブリーダを使用する核融合炉
の温度制御層におけるブランケットに関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to blankets in the temperature control layer of fusion reactors using solid tritium bleeders.

〔従来の技術〕[Conventional technology]

核融合炉におけるブランケットは、核融合プラズマを包
むように置かれ、 H)核融合エネルギー(重水素・トリチウムを燃料とす
る炉では、中性子が持ち出るエネルギー2D+ ”T−
+ ’He(3.5MeV) +n (14.1MeV
) )を熱エネルイーに変換する. (ロ)トリチクムを再生産する( ’Li + n →
’Ha( 2.1Mon) + ”T(2.7MeV)
 ).←→ 外部への放射線漏れを防ぐ放射線遮蔽体と
なる. 等の機能を有する。
In a fusion reactor, a blanket is placed to enclose the fusion plasma, and H) Fusion energy (in reactors fueled by deuterium and tritium, the energy carried out by neutrons is 2D+ "T-").
+ 'He (3.5MeV) +n (14.1MeV
) ) into thermal energy E. (b) Reproduce triticum ('Li + n →
'Ha(2.1Mon) + "T(2.7MeV)
). ←→ Acts as a radiation shield to prevent radiation leakage to the outside. It has the following functions.

トリチウム・ブリーダ(Lt20. LtAIO2等)
は、その特性上,約400〜1000℃に温度制御され
る必要があシ,ブリーダと冷却管又は構造材との間に温
度創御層が設けられる. 温度制御層の従来技術としては,第4図乃至第6図に示
すよ5κ,マプール(ガ2スに似た固体)で中間層を形
成する方式,或はヘリウムガスイヤツプを利用する方式
(例えば特公昭62−57235号公報)等が提案され
ている. 第4図乃至第6図において、1はブリーダ,2は冷却管
,3はシェル(II,構造材),5aはマコール,  
5bはヘリウムガスギャップ, 5cはスペーサである
Tritium breeder (Lt20. LtAIO2 etc.)
Due to its characteristics, it is necessary to control the temperature to approximately 400 to 1000°C, and a temperature control layer is provided between the bleeder and the cooling pipe or structural material. As shown in Figures 4 to 6, conventional techniques for the temperature control layer include a method of forming an intermediate layer with 5κ, maple (a solid similar to gas), or a method of using a helium gas earpipe. (For example, Japanese Patent Publication No. 62-57235) etc. have been proposed. In FIGS. 4 to 6, 1 is a bleeder, 2 is a cooling pipe, 3 is a shell (II, structural material), 5a is a macor,
5b is a helium gas gap, and 5c is a spacer.

第6図(a)は温度制御層としてマコール5aを使用し
た例で、第6図(b) , (C) , (d)はそれ
ぞれヘリウムガスギャップ方式を示している. 〔発明が解決しようとする課題〕 前述のような従来技術には下記の問題点があう、ブラン
ケットとしての実用性を欠く恐れが大きい。
Figure 6(a) shows an example in which Macor 5a is used as the temperature control layer, and Figures 6(b), (C), and (d) each show the helium gas gap method. [Problems to be Solved by the Invention] The prior art as described above has the following problems, and there is a great possibility that it will lack practicality as a blanket.

(1)マコールの場合: 脆く、割れる可能性がある. クッション性がない.ブリーダの種類によっては、使用
中にスエリング(膨張する)を起すものかあシ、クッシ
ョン性がないと,スエリング,熱膨張等の寸法変化,機
械的振動に対する考慮が必要となる。
(1) In the case of Makor: It is brittle and may break. There is no cushioning. Depending on the type of bleeder, it may swell during use, and if it does not have cushioning properties, consideration must be given to swelling, dimensional changes such as thermal expansion, and mechanical vibration.

(2)ヘリウムかスギャツプ方式の場合:冷却管とゾリ
ーダ間に適当なスペーサを入れる等の工夫がいる。
(2) In the case of helium or gap type: It is necessary to take measures such as inserting an appropriate spacer between the cooling pipe and the zorider.

冷却管外表面温度は、約300℃(実験用=100〜3
00℃),ブリーダは約400〜1000℃と高温でか
つ,温度差が大きい。高放射線(中性子等)を受けるの
で、スイーサの構造・材質に対する制約が大きい.また
大きな据付空間を必要とする. なお,上記の温度は、Lr20 (酸化リチウム)ブリ
ーダを高圧水で冷却する場合の例である。
The outer surface temperature of the cooling tube is approximately 300℃ (experimental use = 100~3
00°C), the bleeder is at a high temperature of approximately 400 to 1000°C, and there is a large temperature difference. Since it is exposed to high radiation (neutrons, etc.), there are significant restrictions on the structure and material of the sweeter. It also requires a large installation space. Note that the above temperature is an example when the Lr20 (lithium oxide) bleeder is cooled with high-pressure water.

〔課題を解決するための手段〕[Means to solve the problem]

温度制御層として、下配の特性を有するセラミックス・
7アイパを採用する. (1)クッション性がある。(もろくない。寸法変化追
従性大) (2)ブリーダと構造材・冷却管との間の熱抵抗値の調
整が容易。
As a temperature control layer, ceramics with the characteristics of the lower layer
Adopts 7 AIPA. (1) Has cushioning properties. (Not brittle. Great ability to follow dimensional changes) (2) Easy adjustment of thermal resistance between the bleeder and structural material/cooling pipe.

(3)ブリーダ等他の接触材料と両立性のあるセラ實ツ
クス(アルξナ,窒化ケイ素等)を選択できるので、選
択範囲が拡大する。
(3) Since it is possible to select a ceramic material (aluminum, silicon nitride, etc.) that is compatible with other contact materials such as a bleeder, the range of selection is expanded.

(4)温度制御層用のスペースが小でよい。(4) Only a small space is required for the temperature control layer.

以上によシブランケットの実現可能性が大となる。This increases the possibility of realizing the Yoshiblanket.

なお,セラミックス・ファイバの例としては、アルミナ
ファイバ,シリカ7アイパ,ダラスファイバ,カーボン
ファイバ等がある.ファイバの寸法形状としては、種々
考えられるが、例えば,直径0.1〜2■,長さ20〜
70 m.,直径断面形状:円,多角形等。
Examples of ceramic fibers include alumina fiber, silica 7-iper, Dallas fiber, and carbon fiber. Various dimensions and shapes of the fiber can be considered, but for example, a diameter of 0.1 to 2 cm and a length of 20 to 2 cm.
70 m. , Diameter cross-sectional shape: circle, polygon, etc.

〔作用〕[Effect]

ブリーダ内では,種々の熱が発生する。(主要な発生熱
としては,ブリーダ内に飛び込んだ中性子やガンマ線の
運動エネルイが熱エネルイκ変化することによる熱,中
性子がゾリーダ構戒要素であるL1(リチウム)と、核
反応を起こし,トリチクムを生成する際に発生する熱が
ある.)これらの熱の単位時間当シの発生割合は,必ず
しも一定ではなく、種々の条件によう変動する.冷却管
中を流れる冷却水の流速,温度,圧力等の条件もある程
度の範囲内で変更することもあ)5る。このように変動
する条件の下で、ブリーダの温度は、その特性上、約4
00〜1000℃( L1,0ゾリーダの例)K制御さ
れる必要がある.固体ブリーダは−体物(モノリシツク
)の場合もあれば、粒状(この場合は、ブリーダ粒は薄
い金属板で包む等の工夫をして使用する。)の場合等、
種々考えられるが,いずれにしても固体であシ、スエリ
ング(中性子,ガンマ線等の放射線によシふくらむこと
を言ウ.),熱膨張等の寸法変化,各種の原因によシ発
生する振動に対する配慮が必要である。又,使用される
環境も高温( Li20ブリーダの場合, 約300〜
1000℃),高放射線下と苛酷である。
Various kinds of heat are generated inside the bleeder. (The main heat generated is the heat caused by the kinetic energy of neutrons and gamma rays that entered the bleeder changing into thermal energy κ, and the neutrons causing a nuclear reaction with L1 (lithium), which is a component of Zorida, and causing triticum. (There is heat generated during generation.) The rate of generation of these heat per unit time is not necessarily constant and varies depending on various conditions. Conditions such as the flow rate, temperature, and pressure of the cooling water flowing through the cooling pipes may also be changed within a certain range). Under these fluctuating conditions, the temperature of the bleeder is, by its nature, approximately 4
00 to 1000℃ (example of L1,0 Zorida) K must be controlled. Solid bleeders may be monolithic, or granular (in this case, the bleeder granules are wrapped in a thin metal plate, etc.).
There are various possibilities, but in any case, it is a solid, and it is against swelling (swelling due to radiation such as neutrons and gamma rays), dimensional changes such as thermal expansion, and vibrations caused by various causes. Consideration is required. Also, the environment in which it is used is high temperature (approximately 300~300℃ for Li20 bleeder)
(1000℃), high radiation and harsh conditions.

このよう欧悪条件下において、適度な熱伝達率ヲ持つ、
セラミックス・ファイバは、優れた機能を有する. 即ち、セラミックス・ファイバは、寸法変化や振動に対
してはクッションとなう、高温に対しては、余裕のある
耐高温特性を有し、高放射線に対しても高い安定度を有
する。また,ブリーダや、構造材等、接触して使用され
る材料に対して良好な両立性を有し、所要スペースもそ
れほど大きくない。さらに、このセラミックス・7アイ
パに適切な流体を(例えば、ヘリウム・ガス)適量流す
ことによシ、その熱伝達率を調整可能であシ、条件追随
性が良い。
Under such adverse conditions, it has an appropriate heat transfer rate.
Ceramic fibers have excellent functionality. That is, ceramic fibers provide a cushion against dimensional changes and vibrations, have sufficient high-temperature resistance characteristics, and have high stability against high radiation. In addition, it has good compatibility with materials used in contact with it, such as bleeders and structural materials, and does not require much space. Furthermore, by flowing an appropriate amount of an appropriate fluid (for example, helium gas) through this ceramic 7-IPA, the heat transfer coefficient can be adjusted, and the condition can be easily followed.

〔実施例〕〔Example〕

第1図乃至第3図において,1はトリチウム・ブリーダ
,2は冷却管,3はシェル(!!,構造材),4は仕切
板,5は温度制御層,6はセラミックス・ファイバ,7
は板,8は線材,9は通気用大である. 核融合炉のブランケットは、核融合エネルイを熱エネル
イに変換・回収する、またトリチクムを生産・回収する
等重要な機能を有している.トリチウム・ブリーダとし
ては、液体金属,固体等が使用される.固体ブリーダ方
式の場合,ブリーダを詰めたシェルの中に除熱・温度制
御・エネルギ回収用の冷却管を通すブリーダ・アウトサ
イド・チューブ( BOT : Breeder Ou
tside Tube )方式や、ブリーダ・イン・チ
ューブ(BIT)方式等が考えられるが,ここでは、B
OT方式の実施例について説明する。
In Figures 1 to 3, 1 is a tritium bleeder, 2 is a cooling pipe, 3 is a shell (!!, structural material), 4 is a partition plate, 5 is a temperature control layer, 6 is a ceramic fiber, 7
is a plate, 8 is a wire rod, and 9 is a large one for ventilation. The blanket of a fusion reactor has important functions such as converting and recovering fusion energy into thermal energy, and producing and recovering triticum. Liquid metals, solids, etc. are used as tritium breeders. In the case of the solid bleeder method, a bleeder outside tube (BOT) is used to pass cooling pipes for heat removal, temperature control, and energy recovery into the shell filled with the bleeder.
Possible methods include the tside tube) method and the bleeder-in-tube (BIT) method, but here we will use the BIT method.
An example of the OT method will be described.

トリチクム・ブリーダ( L120, Li#O,等)
1は、その特性上、約400〜1,000 ′cに温度
制御される必要があシ、冷却管2の温度は約300℃が
、又シエル(壁,構造材)3や、仕切板4等は約300
℃以下に保持されることが適当とされている。
Triticum breeda (L120, Li#O, etc.)
1, due to its characteristics, needs to be temperature controlled to about 400 to 1,000'C, and the temperature of the cooling pipe 2 is about 300C, but also the shell (wall, structural material) 3 and the partition plate 4. etc. is about 300
It is considered appropriate to maintain the temperature below ℃.

そこで、ブリーダ1と冷却管2又はシエル3,や仕切板
4との間には、温度制御層5が設置される.本発明では
,この温度制御層5として、セラミックス・7アイパ6
を使用する. 第2図(b),第3図(b)は、第2図(a),第3図
(mlに使用したセラぢツクス・ファイバ6単体の拡大
図であシ、もちろん,これら以外の形状のファイバ、或
は各形状寸法のミックス(混合)使用も可能である. セラミックス・ファイバのセッティング(組み合せ加工
)は次のようにして行う。
Therefore, a temperature control layer 5 is installed between the bleeder 1 and the cooling pipe 2 or the shell 3 or the partition plate 4. In the present invention, the temperature control layer 5 is made of ceramic 7-iper 6.
Use. Figures 2(b) and 3(b) are enlarged views of the single ceramic fiber 6 used in Figures 2(a) and 3 (ml). It is also possible to use a mix of fibers or different shapes and sizes.Setting (combining) ceramic fibers is done as follows.

セラミックス・ファイバ6は、各単体をただ置いただけ
では、バラバラと散逸してしまうため、第2図(a),
第3図(a)に示す如く、板7と線材8によシセッティ
ング(組み合せ加工)しておくことが適当である. セッティングの仕方としては,例えば、まず板7を作業
床(図示していない)上に置き、該板7上にセラミック
・ファイバ6を1〜2層仮置きし,点又は線溶接によう
,セラミックス・ファイバ同志及びセラミックス・ファ
イバと板7とを適度に結合させる。次に再度、セラミッ
クス・ファイバを2〜3層仮置きし、点又は線溶接によ
う,セラミックス・ファイバ同志を適度に結合させる.
これを所要回数行ない,最後に、板8を置き、点又は線
溶接によ1線材8とセラミックス・ファイバ6とを適度
に結合させる。
If the ceramic fiber 6 is simply placed on its own, it will dissipate in pieces;
As shown in FIG. 3(a), it is appropriate to set (combine) the plate 7 and wire 8. The setting method is, for example, to first place the plate 7 on a work floor (not shown), temporarily place one or two layers of ceramic fiber 6 on the plate 7, and place the ceramic fiber 6 on the plate 7 for spot or line welding. - Properly bond the fibers and the ceramic fibers to the plate 7. Next, temporarily place two to three layers of ceramic fibers again, and bond the ceramic fibers appropriately by point or line welding.
This is repeated a required number of times, and finally, the plate 8 is placed and the wire rod 8 and the ceramic fiber 6 are properly bonded by spot or line welding.

尚、板7には通気用穴9が設けてある.通気用穴9には
、温度制御用の気体(例:Heガス),及びトリチウム
・スウイープ用の気体σリチウムを取シ出すことを目的
としたガスを言う)(例:Heガス)が通る。また板7
は、短冊(たんざく)状の多数枚の板の組み合せとする
、又はリプを設ける、或はプレスによう(補強)溝を設
ける等の変更を加えることもできる。
Note that the plate 7 is provided with ventilation holes 9. A gas for temperature control (eg, He gas) and a gas for extracting the gas σ lithium for tritium sweep (eg, He gas) pass through the ventilation holes 9. Also board 7
It is also possible to make changes such as combining a large number of strip-shaped plates, providing a lip, or providing a reinforcing groove in the press.

セラミックス・ファイバをシェルに設置する方法は次の
通シである。
The method for installing the ceramic fiber in the shell is as follows.

板状にセッティングしたセラミックス・ファイバを、さ
らに箱状に組み合わせ、その中に、トリチウム・ブリー
ダ1を収容した後、シエル3に設置する方法、又は板状
にセッティングしたセラミックス・ファイバをまず、シ
エ/I/3に設置後、トリチウム・ブリーダ1を収容す
る方法等がある。
Ceramic fibers set in a plate shape are further combined into a box shape, and the tritium bleeder 1 is housed in the box, and then installed in the shell 3, or the ceramic fibers set in a plate shape are first placed in the shell 3. There are methods of accommodating the tritium breeder 1 after installing it in I/3.

〔発明の効果〕〔Effect of the invention〕

本発明ではブランケットの温度制御層として、セラミッ
クス・ファイバを採用しているため、次記の如き効果が
ある。
In the present invention, since ceramic fiber is employed as the temperature control layer of the blanket, the following effects are achieved.

(1)冷却管とブリーダ関に、寸法変化追従性が大きい
ファイバ層があるため,クッション性が大きい. (2)ブリーダ等他の接触材料と両立性のある材(アル
ミナ,窒化ケイ素等)を選択できる。
(1) There is a fiber layer between the cooling pipe and the bleeder that has a high ability to follow dimensional changes, so it has great cushioning properties. (2) Materials (alumina, silicon nitride, etc.) that are compatible with other contact materials such as bleeders can be selected.

(3)温度制御層用のスイースが小さくてよい。(3) The swiss for the temperature control layer may be small.

(4)  ブリーダ温度制御層にヘリウムガスを流す時
は、ブリーダと構造材・冷却管との間の熱抵抗値の調整
が容昌であシ、ブランケットとしての実用性が高くなる
(4) When helium gas is flowed through the bleeder temperature control layer, the thermal resistance value between the bleeder and the structural material/cooling pipe can be easily adjusted, making it more practical as a blanket.

【図面の簡単な説明】[Brief explanation of drawings]

第l図は本発明の実施例の縦断面図、第2図(a)は第
l図A部の拡大図、第2図(b)は第2図(aJκおけ
るセラミックス・ファイバ単体の外観図、第3図(a)
は他の実施例における第l図A部の拡大図,第3図(b
)は第3図(a)におけるセラミックス・ファイバ単体
の外観図、第4図は従来のブランケットの概要図、第5
図は第4図B部の拡大図、第6図(a)はマコールを使
用した従来装置の要部拡大図、第6図(b)はヘリウム
ガスギャップ方式の従来装置の要部拡大図、第6図(C
)は第6図(b)の断面図、第6図(d)は第4図のシ
ェル部分の拡大図である.l・・・トリチウム・ブリー
ダ,  2・・・冷却管,3・・・シェル(構造材),
4・・・仕切板,5・・・温度制御層,   6・・・
セラミックス・ファイバ。
Figure 1 is a vertical sectional view of an embodiment of the present invention, Figure 2 (a) is an enlarged view of section A in Figure 1, and Figure 2 (b) is an external view of a single ceramic fiber in Figure 2 (aJκ). , Figure 3(a)
is an enlarged view of part A in FIG. 1 in another embodiment, and FIG.
) is an external view of the single ceramic fiber in Figure 3(a), Figure 4 is a schematic diagram of the conventional blanket, and Figure 5 is a schematic diagram of the conventional blanket.
The figure is an enlarged view of part B in Fig. 4, Fig. 6 (a) is an enlarged view of the main part of a conventional device using Macor, and Fig. 6 (b) is an enlarged view of the main part of a conventional device using a helium gas gap method. Figure 6 (C
) is a sectional view of FIG. 6(b), and FIG. 6(d) is an enlarged view of the shell portion of FIG. 4. 1... Tritium bleeder, 2... Cooling pipe, 3... Shell (structural material),
4... Partition plate, 5... Temperature control layer, 6...
Ceramic fiber.

Claims (2)

【特許請求の範囲】[Claims] (1)固体トリチウム・ブリーダを使用する核融合ブラ
ンケットにおいて、ブリーダと冷却管又はブランケット
壁等の構造材との間に存在するブリーダ温度制御層とし
てセラミックス・ファイバの層を設けたことを特徴とす
る核融合ブランケツト。
(1) A nuclear fusion blanket using a solid tritium bleeder, characterized in that a ceramic fiber layer is provided as a bleeder temperature control layer between the bleeder and a structural material such as a cooling pipe or blanket wall. Fusion blanket.
(2)セラミツクス・ファイバの層にヘリウムガス等の
流体を流し、ブリーダ温度制御層の熱伝導率を制御可能
に構成した請求項(1)記載の核融合ブランケット。
(2) The nuclear fusion blanket according to claim (1), wherein the thermal conductivity of the bleeder temperature control layer can be controlled by flowing a fluid such as helium gas through the ceramic fiber layer.
JP1149325A 1989-06-14 1989-06-14 Nuclear fusion blanket Pending JPH0315795A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1149325A JPH0315795A (en) 1989-06-14 1989-06-14 Nuclear fusion blanket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1149325A JPH0315795A (en) 1989-06-14 1989-06-14 Nuclear fusion blanket

Publications (1)

Publication Number Publication Date
JPH0315795A true JPH0315795A (en) 1991-01-24

Family

ID=15472647

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1149325A Pending JPH0315795A (en) 1989-06-14 1989-06-14 Nuclear fusion blanket

Country Status (1)

Country Link
JP (1) JPH0315795A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5248843A (en) * 1991-02-08 1993-09-28 Sight & Sound Incorporated Electronic musical instrument with sound-control panel and keyboard

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5248843A (en) * 1991-02-08 1993-09-28 Sight & Sound Incorporated Electronic musical instrument with sound-control panel and keyboard

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