JPS6223039Y2 - - Google Patents
Info
- Publication number
- JPS6223039Y2 JPS6223039Y2 JP1980131404U JP13140480U JPS6223039Y2 JP S6223039 Y2 JPS6223039 Y2 JP S6223039Y2 JP 1980131404 U JP1980131404 U JP 1980131404U JP 13140480 U JP13140480 U JP 13140480U JP S6223039 Y2 JPS6223039 Y2 JP S6223039Y2
- Authority
- JP
- Japan
- Prior art keywords
- terminal body
- terminal
- sealing
- heating element
- outer tube
- 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
Links
- 238000007789 sealing Methods 0.000 claims description 43
- 238000010438 heat treatment Methods 0.000 claims description 32
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 239000000919 ceramic Substances 0.000 claims description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 238000005253 cladding Methods 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 239000003758 nuclear fuel Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052721 tungsten Inorganic materials 0.000 claims description 6
- 239000010937 tungsten Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000008018 melting Effects 0.000 description 9
- 238000002844 melting Methods 0.000 description 9
- 239000000446 fuel Substances 0.000 description 8
- 230000020169 heat generation Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000005219 brazing Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000003685 thermal hair damage Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910001080 W alloy Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 229910001093 Zr alloy Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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
- Y02E30/30—Nuclear fission reactors
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Resistance Heating (AREA)
Description
【考案の詳細な説明】
本考案は原子炉燃料棒被覆管破裂試験用シーズ
ヒータに関する。[Detailed Description of the Invention] The present invention relates to a sheathed heater for nuclear reactor fuel rod cladding rupture tests.
原子炉燃料棒の被覆管破裂試験を行なう場合
に、燃料棒の代りに模擬燃料棒として用いるシー
ズヒータは、約1200℃以上の高い表面温度が要求
されるために発熱量が大きい材料からなる発熱体
を使用し、且つ使用環境を考慮して端子部を耐高
圧気密封着構造として、端子は発熱体の発熱を高
める上で大電流通電を可能とするとともに端子自
身の発熱を抑制するために低抵抗の材料で形成し
ている。 When performing cladding rupture tests on reactor fuel rods, sheathed heaters, which are used as simulated fuel rods instead of fuel rods, require a high surface temperature of approximately 1200°C or higher, so they are made of materials with a large calorific value. In consideration of the usage environment, the terminal part has a high-pressure hermetically sealed structure, which increases the heat generation of the heating element, enables large current to flow, and suppresses the heat generation of the terminal itself. Made of low resistance material.
しかして、このような模擬燃料棒用の高温気密
シーズヒータにおける問題点は、実際の燃料棒に
即して端子部を充分な耐圧気密封着構造とするこ
とに加えて、発熱体が高温となるためこの熱の熱
伝導により端子自身も熱せられ、端子を挿通封着
している端子封着部に悪影響を与えることであ
る。通常、端子封着部は熱衝撃に弱いセラミツク
スや鉄−ニツケル合金からなる封着部材で構成し
ているため、端子を介して伝導した発熱体の熱に
より熱衝撃を与えられて熱破損し、耐高圧気密構
造を保持できなくなる。従つて、高い発熱量を有
する発熱体を使用できなくなる。 However, the problem with such high-temperature hermetic sheathed heaters for simulated fuel rods is that in addition to making the terminals have a sufficiently pressure-resistant hermetic sealing structure to match the actual fuel rods, the heating element must be heated to a high temperature. Therefore, due to the conduction of this heat, the terminal itself is also heated, which has an adverse effect on the terminal sealing portion in which the terminal is inserted and sealed. Normally, the terminal sealing part is made of a sealing member made of ceramics or iron-nickel alloy that is susceptible to thermal shock, so it is subject to thermal shock due to the heat of the heating element conducted through the terminal, resulting in thermal damage. It becomes impossible to maintain a high pressure resistant airtight structure. Therefore, a heating element with a high calorific value cannot be used.
本考案は前記事情に鑑みてなされたもので、外
管の開口端部に挿通した端子をセラミツクスから
なる封着環および封着用合金からなる一対の端部
環の組合せにより封着保持してコンプレツシヨン
構造とすることにより、端子部を充分な耐圧気密
封着構造とし、さらに端子を発熱体と接続する部
分から順に鉄、ニツケルおよび銅で区分して構成
することにより、端子における温度上昇を抑制し
て端子封着部の熱破損を防止した端子構造を有す
る原子炉燃料棒被覆管破裂試験用シーズヒータを
提供するものである。 The present invention was developed in view of the above-mentioned circumstances, and is a compressor that seals and holds a terminal inserted into the open end of an outer tube by a combination of a sealing ring made of ceramics and a pair of end rings made of a sealing alloy. By adopting a tension structure, the terminal part has a sufficiently pressure-resistant airtight sealing structure, and by separating the terminal from iron, nickel, and copper in the order from the part where it connects to the heating element, temperature rise at the terminal can be suppressed. The present invention provides a sheathed heater for nuclear reactor fuel rod cladding rupture tests that has a terminal structure that suppresses thermal damage to the terminal sealing portion.
以下本考案を図面で示す一実施例について説明
する。 An embodiment of the present invention will be described below with reference to drawings.
図はシーズヒータの端子部を示すものであり、
１は例えばジルカロイからなる外管で、この外管
１内部にはアルミナセラミツクスなどのセラミツ
クス焼結体からなる絶縁筒２が嵌着してある。こ
の絶縁筒２の内部には複数本のタングステン合金
からなる直線状の発熱体３……が挿通保持してあ
り、これら発熱体３……の端部は絶縁筒２から突
出している。外管１の端部には、後述する構造の
端子４が挿通して設けてあり、この端子４は外管
１の開口端から外部へ突出している。端子４が通
過する外管１の開口端は、耐圧気密封着構造とし
て端子４を挿着保持している。 The figure shows the terminal part of the sheathed heater.
Reference numeral 1 denotes an outer tube made of, for example, Zircaloy, and an insulating tube 2 made of a sintered ceramic such as alumina ceramics is fitted inside the outer tube 1. A plurality of linear heating elements 3 made of a tungsten alloy are inserted and held inside the insulating cylinder 2, and the ends of these heating elements 3 protrude from the insulating cylinder 2. A terminal 4 having a structure to be described later is inserted through the end of the outer tube 1, and this terminal 4 projects outward from the open end of the outer tube 1. The open end of the outer tube 1 through which the terminal 4 passes has a pressure-resistant air-tight sealing structure to insert and hold the terminal 4 therein.
すなわち、図中５は外管１の開口端部に並んで
設けられたアルミナなどのセラミツクス焼結体か
らなる封着環で、この封着環５には端子４の端子
本体８が挿通してある。封着環５の両端部の外周
側には環体である一対の端部環６ａ，６ｂが嵌合
してろう付けにより接合封着してある。この端部
環６ａ，６ｂは封着能力に優れた封着環５のセラ
ミツクス材料の熱膨張率に近い熱膨張率を有する
封着用合金、例えば鉄−ニツケル系合金からなる
ものである。一方の端部環６ｂは外管１の開口端
に溶接またはろう付けにより接合してあり、他方
の端部環６ａは封着環５に挿通した端子本体８を
挿通させて溶接またはろう付けにより接合してあ
る。このため封着環５と端部環６ａ，６ｂは端子
本体８、すなわち端子４を外管１の開口端部に対
し封着して保持し、端子封着部の耐圧気密封着構
造を構成している。 That is, in the figure, reference numeral 5 denotes a sealing ring made of a sintered ceramic such as alumina that is provided in line with the open end of the outer tube 1, and the terminal body 8 of the terminal 4 is inserted through this sealing ring 5. be. A pair of end rings 6a and 6b, which are annular bodies, are fitted onto the outer periphery of both ends of the sealing ring 5 and are joined and sealed by brazing. The end rings 6a, 6b are made of a sealing alloy, such as an iron-nickel alloy, which has a coefficient of thermal expansion close to that of the ceramic material of the sealing ring 5, which has excellent sealing ability. One end ring 6b is joined to the open end of the outer tube 1 by welding or brazing, and the other end ring 6a is joined by welding or brazing after the terminal body 8 inserted through the sealing ring 5 is inserted. It is joined. Therefore, the sealing ring 5 and the end rings 6a and 6b seal and hold the terminal main body 8, that is, the terminal 4, to the open end of the outer tube 1, and constitute a pressure-resistant airtight sealing structure of the terminal sealing part. are doing.
しかして、端子４の構造について述べると、端
子４は端子本体８、中間端子体９および端部端子
体１０とを一体物として接合して構成される。端
子本体８は銅（抵抗率100μΩcm、20℃、融点
1083℃）で形成され、中間端子体９は端子本体８
の銅に比して融点が高いとともに抵抗値が低い純
ニツケル（抵抗率6.9μΩcm、20℃、融点1452
℃）で形成され、端部端子体１０は端子本体８の
銅および中間端子体９のニツケルに比して最も高
融点であり、抵抗値が発熱体３の軸方向の単位長
さ当りの抵抗に比して低い純鉄（抵抗率10.0μΩ
cm、20℃、融点1529℃）で形成してある。また、
端子本体８は封着環５および端部環６ａ，６ｂに
挿着してある。中間端子体９は端子本体８の端部
に同軸的に接合して外管１の内部に設けられてい
る。端部端子体１０は中間端子体９の端部に接合
して外管１の内部に設けられている。中間端子体
９と端部端子体１０は外管１の内部に設けた絶縁
管７に挿入して保持されている。なお、端子本体
８と各端子体９，１０を互に接合するためには、
例えば接合端部に突起８ａ，９ａおよびこの突起
８ａ，９ａに組合さる孔９ｂ，１０ｂを形成して
互に係合し、且つ各接合端部を互に溶接により固
着する。さらに、端部端子体１０の端部には、端
面とこの端面より離れて形成した環状溝１１ａと
の間に案内部１１を形成し、この案内部１１には
この外周部に等間隔を存して複数の案内孔１１ｂ
……を形成して、且つ絶縁筒２から延出した各発
熱体３……を案内孔１１ｂ……に挿通してその端
部を環状溝１１ａに導出するとともにこの導出し
た発熱体端部を環状溝１１ａの側壁に形成した固
定孔１１ｃ……に挿入固定している。このため、
端部端子体１０は発熱体３……と接続される。 Regarding the structure of the terminal 4, the terminal 4 is constructed by joining a terminal main body 8, an intermediate terminal body 9, and an end terminal body 10 as one body. The terminal body 8 is made of copper (resistivity 100μΩcm, 20℃, melting point
1083°C), and the intermediate terminal body 9 is formed at a temperature of 1083°C.
Pure nickel has a higher melting point and lower resistance than copper (resistivity 6.9μΩcm, 20℃, melting point 1452
The end terminal body 10 has the highest melting point compared to the copper of the terminal body 8 and the nickel of the intermediate terminal body 9, and its resistance value is the resistance per unit length in the axial direction of the heating element 3. Pure iron (resistivity 10.0μΩ) is lower than
cm, 20℃, melting point 1529℃). Also,
The terminal body 8 is inserted into the sealing ring 5 and the end rings 6a, 6b. The intermediate terminal body 9 is coaxially joined to the end of the terminal body 8 and provided inside the outer tube 1. The end terminal body 10 is connected to the end of the intermediate terminal body 9 and is provided inside the outer tube 1. The intermediate terminal body 9 and the end terminal body 10 are inserted into and held in an insulating tube 7 provided inside the outer tube 1. In addition, in order to mutually join the terminal body 8 and each terminal body 9, 10,
For example, protrusions 8a, 9a and holes 9b, 10b that are associated with the protrusions 8a, 9a are formed at the joint ends so that they engage with each other, and the respective joint ends are fixed to each other by welding. Further, at the end of the end terminal body 10, a guide part 11 is formed between the end face and an annular groove 11a formed apart from the end face, and the guide part 11 has equal intervals on the outer periphery. and a plurality of guide holes 11b
. . . and extending from the insulating tube 2 are inserted into the guide holes 11 b . . . and their ends are led out to the annular groove 11 a. It is inserted and fixed into fixing holes 11c formed in the side wall of the annular groove 11a. For this reason,
The end terminal body 10 is connected to the heating element 3 .
そして、発熱体３……に通電された電流は端子
４を通つて流れる。この時タングステンからなる
発熱体３……で生じた熱は端子４の端部端子体１
０、中間端子体９、端子本体８の順で伝導する。
ここで、端部端子体１０は発熱体３に比して低い
抵抗値の鉄で形成してあるために、発熱体３に比
して発熱量が低い。そして、端子４は３分割して
あるために端部端子体１０、中間端子体９、端子
本体８の順で発熱温度が低下していく。なお、端
部端子体１０、中間端子体９、端子本体８は順次
融点が低い材料で形成してあるため、各部分は温
度上昇に充分耐えて溶融することがない（各部分
での最高温度を考慮してこれを越えた融点を有す
る材料で形成する）。タングステン合金で形成さ
れた発熱体３……は発熱により約1600℃の温度に
達するが、純鉄からなる端部端子体１０は約800
〜1500℃の温度となり（融点1529℃）、純ニツケ
ルからなる中間端子体９では200℃〜800℃に温度
低下し（融点1452℃）、銅からなる端子本体８で
は約100℃にまで低下する。なお、アルミナセラ
ミツクスからなる封着環５と、鉄−ニツケル合金
からなる端部環６ａ，６ｂの封着構造部は約150
℃の温度まで耐えられるので、端子本体８の熱に
より熱破損することはない。このようにして端子
４では発熱体３……からの熱伝達とそれ自身の抵
抗による発熱に伴う温度を、発熱体３に比して低
下させることができ、端子本体８の部分では封着
環５が熱衝撃により破損しない程度まで低下させ
て端子封着部の熱破損を防止することができる。
また、端部端子体１０を鉄で形成することによ
り、端部端子体１０の発熱体接続部に発熱体３を
形成するタングステンと鉄とでもろい化合物を形
成することがないために、端部端子体１０と発熱
体３との接続を発熱に耐える強固なものとするこ
とができる。 The current applied to the heating elements 3 flows through the terminals 4. At this time, the heat generated by the heating element 3 made of tungsten is transferred to the end terminal body 1 of the terminal 4.
0, the intermediate terminal body 9 and the terminal body 8 conduct in this order.
Here, since the end terminal body 10 is formed of iron having a lower resistance value than the heating element 3, the amount of heat generated is lower than that of the heating element 3. Since the terminal 4 is divided into three parts, the heat generation temperature decreases in the order of the end terminal body 10, the intermediate terminal body 9, and the terminal body 8. In addition, since the end terminal body 10, intermediate terminal body 9, and terminal body 8 are made of materials with lower melting points in order, each part can sufficiently withstand temperature increases and will not melt (the highest temperature in each part (Made from a material with a melting point exceeding this). The heating element 3 made of tungsten alloy reaches a temperature of about 1600°C due to heat generation, but the end terminal body 10 made of pure iron reaches a temperature of about 800°C.
The temperature reaches ~1500°C (melting point 1529°C), the temperature decreases to 200°C to 800°C (melting point 1452°C) in the intermediate terminal body 9 made of pure nickel, and it drops to about 100°C in the terminal body 8 made of copper. . The sealing structure of the sealing ring 5 made of alumina ceramics and the end rings 6a and 6b made of iron-nickel alloy is approximately 150 mm.
Since it can withstand temperatures up to 10°C, it will not be thermally damaged by the heat of the terminal body 8. In this way, in the terminal 4, the temperature associated with heat transfer from the heating element 3 and heat generation due to its own resistance can be lowered compared to the heating element 3, and the terminal body 8 has a sealing ring. 5 can be reduced to a level that does not cause damage due to thermal shock, thereby preventing thermal damage to the terminal sealing portion.
Furthermore, by forming the end terminal body 10 with iron, a brittle compound is not formed between tungsten and iron, which form the heat generating element 3, at the heat generating element connecting portion of the end terminal body 10. The connection between the terminal body 10 and the heating element 3 can be made strong enough to withstand heat generation.
従つて、端子封着部はタングステンからなる発
熱体３で生じた高い温度の熱による影響を受ける
ことがなくなる。 Therefore, the terminal sealing portion is not affected by the high temperature heat generated by the heating element 3 made of tungsten.
また、端子封着部はセラミツクスからなる封着
環５の両端部外周側にセラミツクスと近似した熱
膨張率を有する封着合金からなる端部環６ａ，６
ｂを嵌合して取着して外管１と端子４との間を封
着するものであるから、端子４の熱による封着環
５の熱変動を端部環６ａ，６ｂで受け止めて外管
１に伝えないので封着構造を保持できる。特に端
部環６ａ，６ｂを封着環５の両端部外周側に嵌合
して封着環５を外周側から包囲するようにして保
持することにより、いわゆるコンプレツシヨンシ
ールの状態となり、より耐圧性に優れた構造とな
つている。 Further, the terminal sealing portion includes end rings 6a, 6 made of a sealing alloy having a coefficient of thermal expansion similar to that of ceramics on the outer periphery of both ends of the sealing ring 5 made of ceramics.
b is fitted and attached to seal between the outer tube 1 and the terminal 4, so the end rings 6a and 6b absorb thermal fluctuations in the sealing ring 5 due to the heat of the terminal 4. Since it is not transmitted to the outer tube 1, the sealed structure can be maintained. In particular, by fitting the end rings 6a and 6b to the outer periphery of both ends of the sealing ring 5 and holding the sealing ring 5 so as to surround it from the outer periphery, a so-called compression seal state is created, which is more effective. It has a structure with excellent pressure resistance.
さらに、発熱体は大きな発熱量を有するタング
ステンで形成しているために、原子炉燃料棒の被
覆管破裂試験に用いるシーズヒータとして必要な
高い表面温度を得ることができる。 Furthermore, since the heating element is made of tungsten, which has a large calorific value, it is possible to obtain a high surface temperature necessary for a sheathed heater used in cladding rupture tests of nuclear reactor fuel rods.
さらにまた、発熱体３を支持する絶縁筒２をセ
ラミツクス焼結体で形成しているので、絶縁筒２
に予め発熱体用の孔を設けて発熱体３を容易に位
置決めすることができる。つまり、発熱体３を実
際の燃料棒の発熱状態に近似させるように正確に
同心円状に配置できる。しかも、模擬燃料棒用の
シーズヒータは実際の燃料棒に近づけるために外
管１の内側のまわりにヘリウムを入れる空〓を設
けることが必要であるが、焼結体からなる絶縁筒
２と外管１との間にはヘリウムガス入れ用の適宜
な空〓を設けることができる。 Furthermore, since the insulating cylinder 2 that supports the heating element 3 is formed of a ceramic sintered body, the insulating cylinder 2
The heating element 3 can be easily positioned by providing a hole for the heating element in advance. In other words, the heating elements 3 can be accurately arranged concentrically so as to approximate the heating state of the actual fuel rod. Moreover, in order to make the sheathed heater for a simulated fuel rod close to an actual fuel rod, it is necessary to provide a space around the inside of the outer tube 1 to fill helium, but the insulating tube 2 made of a sintered body and the outer tube are required. An appropriate space for filling helium gas can be provided between the tube 1 and the tube 1.
本考案の原子炉燃料棒被覆管破裂試験用シーズ
ヒータは以上説明したように、外管の開口端部に
設ける端子の封着部を、セラミツクスからなる封
着環の両端部外周側に封着用金属からなる端部環
を嵌合接合して両者を組合せてコンプレツシヨン
構造とすることにより、模擬燃料棒として必要な
充分な耐圧気密封着構造とすることができるとと
もに、端子封着部を端子の熱による封着環の熱変
動を端部環で受止めて外管に伝えずに耐熱的に大
なる強度をもたせることができる。さらに、端子
を発熱体接続部から順に鉄、ニツケルおよび銅か
らなる部分に区分して構成することにより、端子
における温度上昇を抑制して発熱体の熱の影響に
よる端子封着部の破損を防止でき耐圧気密機能を
保持できる。しかも、発熱体をタングステンで形
成することにより高い表面温度を得ることができ
る。また、発熱体を支持するためにセラミツクス
焼結体からなる絶縁筒を用いることにより、発熱
体を絶縁筒で必要とする位置に容易に位置決めす
ることができる。 As explained above, in the sheathed heater for reactor fuel rod cladding rupture tests of the present invention, the sealing portion of the terminal provided at the open end of the outer tube is sealed to the outer periphery of both ends of the sealing ring made of ceramics. By fitting and joining the end rings made of metal and combining the two to form a compression structure, it is possible to create a pressure-tight airtight sealing structure that is sufficient for a simulated fuel rod, and the terminal sealing part can be Thermal fluctuations in the sealing ring due to the heat of the terminal are received by the end ring, and are not transmitted to the outer tube, making it possible to provide high strength in terms of heat resistance. Furthermore, by structuring the terminal into parts made of iron, nickel, and copper in order from the heating element connection part, temperature rise at the terminal is suppressed and damage to the terminal sealing part due to the influence of heat from the heating element is prevented. It can maintain pressure-resistant and airtight function. Moreover, by forming the heating element with tungsten, a high surface temperature can be obtained. Further, by using an insulating cylinder made of a ceramic sintered body to support the heating element, the heating element can be easily positioned at a required position on the insulating cylinder.
従つて、本考案によれば原子炉燃料棒被覆管破
裂試験用として最適なシーズヒータを得ることが
できる。 Therefore, according to the present invention, it is possible to obtain a sheathed heater most suitable for nuclear reactor fuel rod cladding rupture tests.
図は本考案の一実施例を示す縦断面図である。
１……外管、２……絶縁筒、３……発熱体、４
……端子、５……封着環、６ａ，６ｂ……端部
環、８……端子本体、９……中間端子体、１０…
…端部端子体。
The figure is a longitudinal sectional view showing an embodiment of the present invention. 1... Outer tube, 2... Insulating tube, 3... Heating element, 4
... terminal, 5 ... sealing ring, 6a, 6b ... end ring, 8 ... terminal body, 9 ... intermediate terminal body, 10 ...
...End terminal body.
Claims (1)
ミツクス焼結体からなる絶縁筒２と、この絶縁筒
２を貫通して設けられたタングステンまたはその
合金からなる発熱体３と、前記外管１の開口端部
に接合された封着合金からなる端部環６ｂと、一
端部が前記端部環６ｂの内周部に嵌着されたセラ
ミツクス焼結体からなる封着環５と、この封着環
５の他端外周部に嵌着された封着合金からなる端
部環６ａと、前記封着環５および前記端部環６ａ
に挿着された銅からなる端子本体８と、この端子
本体８に接合されたニツケルからなる中間端子体
９と、この中間端子体９に接合され且つ前記発熱
体３を接続する鉄からなる端部端子体１０とを具
備してなる原子炉燃料棒被覆管破裂試験用シーズ
ヒータ。 an outer tube 1, an insulating tube 2 made of a ceramic sintered body arranged inside the outer tube 1, a heating element 3 made of tungsten or an alloy thereof and provided through the insulating tube 2; An end ring 6b made of a sealing alloy joined to the open end of the outer tube 1, and a sealing ring 5 made of a ceramic sintered body with one end fitted to the inner peripheral part of the end ring 6b. , an end ring 6a made of a sealing alloy fitted to the outer periphery of the other end of the sealing ring 5, and the sealing ring 5 and the end ring 6a.
a terminal body 8 made of copper inserted into the terminal body 8; an intermediate terminal body 9 made of nickel joined to this terminal body 8; and an end made of iron joined to this intermediate terminal body 9 and connected to the heating element 3. A sheathed heater for a nuclear reactor fuel rod cladding rupture test, comprising a terminal body 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980131404U JPS6223039Y2 (en) | 1980-09-16 | 1980-09-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980131404U JPS6223039Y2 (en) | 1980-09-16 | 1980-09-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5661995U JPS5661995U (en) | 1981-05-26 |
| JPS6223039Y2 true JPS6223039Y2 (en) | 1987-06-11 |
Family
ID=29363069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980131404U Expired JPS6223039Y2 (en) | 1980-09-16 | 1980-09-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6223039Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4838599U (en) * | 1971-09-10 | 1973-05-12 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5342342Y2 (en) * | 1974-02-12 | 1978-10-12 |
-
1980
- 1980-09-16 JP JP1980131404U patent/JPS6223039Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4838599U (en) * | 1971-09-10 | 1973-05-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5661995U (en) | 1981-05-26 |
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