JPH0441360Y2 - - Google Patents
Info
- Publication number
- JPH0441360Y2 JPH0441360Y2 JP1986120652U JP12065286U JPH0441360Y2 JP H0441360 Y2 JPH0441360 Y2 JP H0441360Y2 JP 1986120652 U JP1986120652 U JP 1986120652U JP 12065286 U JP12065286 U JP 12065286U JP H0441360 Y2 JPH0441360 Y2 JP H0441360Y2
- Authority
- JP
- Japan
- Prior art keywords
- spring
- neutron detector
- assembly
- earthquake
- guide 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
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral 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)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は原子炉用中性子検出器アセンブリに
関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a neutron detector assembly for a nuclear reactor.
第３図は、従来の中性子検出器のアセンブリを
示すものである。図において２は中性子検出器の
案内管１に挿入された中性子検出器のアセンブリ
で、耐震用板バネ３を前記アセンブリ２の周囲に
ボルトによつて固定されている。第４図は従来の
中性子検出器アセンブリの耐震用板バネ部分の詳
細図で、図中の破線は前記アセンブリ２が案内管
１に挿入される前の耐震用板バネ１を示し、実線
は挿入時の状況を示す。
FIG. 3 shows a conventional neutron detector assembly. In the figure, reference numeral 2 denotes a neutron detector assembly inserted into a guide tube 1 of the neutron detector, and a seismic plate spring 3 is fixed around the assembly 2 with bolts. FIG. 4 is a detailed view of the seismic plate spring portion of a conventional neutron detector assembly, in which the broken line indicates the seismic plate spring 1 before the assembly 2 is inserted into the guide tube 1, and the solid line indicates the seismic plate spring 1 before the assembly 2 is inserted into the guide tube 1. Indicates the situation at the time.
次に動作について説明する。第４図の耐震用の
板バネ３は中性子検出器の案内管１に挿入される
前には破線に示す状態にあり、挿入時には実線に
示す状態となる。更に地震時には前記板バネ３は
前記案内管１に押し付けられ前記板バネ３上端部
の平面部分が中性子検出器のアセンブリ２に接触
するようになる。この時、前記板バネ３の上部に
ある穴の内面がボルト４にぶつかり、前記板バネ
のバネ定数は急激に大きくなる。 Next, the operation will be explained. The seismic plate spring 3 in FIG. 4 is in the state shown by the broken line before being inserted into the guide tube 1 of the neutron detector, and is in the state shown by the solid line when inserted. Further, in the event of an earthquake, the leaf spring 3 is pressed against the guide tube 1, and the flat portion of the upper end of the leaf spring 3 comes into contact with the neutron detector assembly 2. At this time, the inner surface of the hole in the upper part of the leaf spring 3 collides with the bolt 4, and the spring constant of the leaf spring increases rapidly.
第３図に示す従来の中性子検出器アセンブリで
は、地震時に前記板バネが前記ボルトに衝突する
ために、その際の撃力による衝撃ノイズを発生し
たりして中性子の計測上問題となることがあつ
た。 In the conventional neutron detector assembly shown in FIG. 3, when the plate spring collides with the bolt during an earthquake, the impact force generated at that time may generate impact noise, which may cause problems in neutron measurement. It was hot.
このような問題点を解消する手段としては、従
来、特開昭57−17895号公報に示されるような構
造が考えられた。具体的には、バネ定数の異なる
２種以上のバネを中性子検出器のそれぞれ上下に
分けて設置するようにした。 As a means to solve such problems, a structure as shown in Japanese Patent Application Laid-Open No. 17895/1983 has been considered. Specifically, two or more types of springs with different spring constants are separately installed above and below the neutron detector.
しかしながら、上記構成では、地震時におい
て、振動が小さいときには、バネ定数の小さいバ
ネを支点として、また振動が大きいときには、バ
ネ定数の大きいバネを支点として横揺れし、結果
として中性子の計測上問題となることがあつた。
However, with the above configuration, during an earthquake, when the vibration is small, the spring with a small spring constant is used as the fulcrum, and when the vibration is large, the spring with a large spring constant is used as the fulcrum, and the structure sways horizontally, resulting in problems in neutron measurement. Something happened.
この考案は上記のような問題点を解消するため
になされたもので、地震時の衝撃ノイズの発生を
抑制でき、耐震性にも優れた装置を得ることを目
的とする。 This idea was made to solve the above-mentioned problems, and the purpose is to obtain a device that can suppress the generation of impact noise during earthquakes and has excellent earthquake resistance.
この考案に係る原子炉用中性子検出器アセンブ
リは、地震時における衝撃ノイズの発生の問題を
解決するために、バネ定数の小さな板バネの下に
更にもう一枚バネ定数の大きな板バネを重ねる構
造とし、加えて、この少なくとも２枚一組のバネ
を保護管の上部及び下部に設け、この２枚のバネ
を案内管との接点がほぼ同一となるように支持し
たものである。
The neutron detector assembly for nuclear reactors according to this invention has a structure in which a leaf spring with a large spring constant is stacked under a leaf spring with a small spring constant in order to solve the problem of impact noise generation during earthquakes. In addition, a set of at least two springs are provided at the upper and lower parts of the protective tube, and these two springs are supported so that their contact points with the guide tube are substantially the same.
この考案における原子炉用中性子検出器アセン
ブリは、バネ定数の小さな板バネの下に更にもう
一枚バネ定数の大きな板バネを重ねることによ
り、前記アセンブリを挿入する際には容易に挿入
可能で、また地震時にはバネ定数が大きくなり衝
撃ノイズの発生を抑制することが出来る。
The neutron detector assembly for a nuclear reactor according to this invention can be easily inserted by layering another leaf spring with a large spring constant under the leaf spring with a small spring constant. Furthermore, in the event of an earthquake, the spring constant increases, making it possible to suppress the generation of impact noise.
また、保護管の上部及び下部に設けているため
保護管の安定性が向上する。 In addition, since they are provided at the upper and lower parts of the protection tube, the stability of the protection tube is improved.
さらに、２種以上のバネが案内管に対し、ほぼ
同一の接点を有するようにしたため、振動の大小
によらず中性子検出器の重心に対するバネの相対
的な位置が移動しない。 Furthermore, since two or more types of springs have substantially the same contact points with the guide tube, the relative positions of the springs with respect to the center of gravity of the neutron detector do not shift regardless of the magnitude of vibration.
以下この考案の一実施例を図について説明す
る。第１図において、１は中性子検出器の案内管
でこの中に原子炉用中性子検出器のアセンブリを
挿入する。前記アセンブリは、ガンマ線を遮へい
するための遮へいプラグ５、その端に取り付けら
れた検出器支持管６、更にその先に取り付けられ
た検出器保護管７から構成されている。８は中性
子検出器で、この検出器からの信号はMI
（mineral insulated）ケーブル９によつて取り出
される。１０は検出器保護管７に取り付けられた
耐震板バネで１１は耐震板バネ上にボルトに
よつて固定された耐震板バネである。
An embodiment of this invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a guide tube for a neutron detector into which a neutron detector assembly for a nuclear reactor is inserted. The assembly is composed of a shield plug 5 for shielding gamma rays, a detector support tube 6 attached to the end of the shield plug 5, and a detector protection tube 7 attached to the tip of the shield plug 5. 8 is a neutron detector, and the signal from this detector is MI
(mineral insulated) cable 9. Reference numeral 10 designates an earthquake-resistant leaf spring attached to the detector protection tube 7, and reference numeral 11 represents an earthquake-resistant leaf spring fixed onto the earthquake-resistant leaf spring with bolts.
本中性子検出器アセンブリにおいて、バネ定数
の小さな耐震板バネ１０とバネ定数の大きな耐
震板バネ１１を組み合す構造をとつたことで、
前記アセンブリの挿入時には、ほとんど耐震板バ
ネ１０からの抗力のみしか受けずスムーズに案
内管に挿入出来、地震時には振幅が大きくなるに
つれて合成バネ定数が連続的に大きくなることか
ら衝撃によるノイズを抑制出来ると共に固有振動
の大きな系を得ることができる。 In this neutron detector assembly, by adopting a structure that combines the earthquake-resistant leaf spring 10 with a small spring constant and the earthquake-resistant leaf spring 11 with a large spring constant,
When inserting the assembly, it can be smoothly inserted into the guide tube, receiving almost only the drag force from the seismic leaf spring 10, and in the event of an earthquake, noise due to impact can be suppressed because the composite spring constant increases continuously as the amplitude increases. In addition, a system with large natural vibration can be obtained.
またバネ定数が非線形となることからバネ自身
の共振の発生も防ぐことができる。 Furthermore, since the spring constant is nonlinear, resonance of the spring itself can be prevented.
第２図は耐震板バネ１０及び１１の部分の
詳細図で、前記アセンブリ挿入前の耐震板バネ
の状態を破線で示している。 FIG. 2 is a detailed view of the seismic leaf springs 10 and 11, and the state of the seismic leaf springs before the assembly is inserted is shown by broken lines.
以上のようにこの考案によれば、原子炉用中性
子検出器アセンブリに二重の板バネを付加するこ
と等により、前記アセンブリ挿入が容易に行なう
ことが可能で、地震時には衝撃ノイズを抑制出
来、また、振動の大小によらず安定性が高く、固
有振動の大きな安全な装置を得られる効果があ
る。
As described above, according to this invention, by adding double leaf springs to the neutron detector assembly for a nuclear reactor, the assembly can be easily inserted, and impact noise can be suppressed in the event of an earthquake. In addition, it has the effect of providing a safe device that is highly stable regardless of the magnitude of vibration and has a large natural vibration.
第１図はこの考案の一実施例による原子炉用中
性子検出器アセンブリを示す構造図、第２図は第
１図に示す耐震バネ、及び耐震バネの詳細説
明図である。第３図は従来の検出器アセンブリ
で、第４図は第３図の詳細図である。
図において１は中性子検出器案内管、２は中性
子検出器アセンブリ、３は耐震用板バネ、４はボ
ルト、５は遮へいプラグ、６は検出器支持管、７
は検出器保護管、８は中性子検出器、９はMIケ
ーブル、１０は耐震板バネ、１１は耐震板バネ
である。各図中の同一符号は同一又は相当部分
を示す。
FIG. 1 is a structural diagram showing a neutron detector assembly for a nuclear reactor according to an embodiment of this invention, and FIG. 2 is a detailed explanatory diagram of the seismic spring shown in FIG. 1 and the seismic spring. FIG. 3 is a conventional detector assembly, and FIG. 4 is a detailed view of FIG. In the figure, 1 is a neutron detector guide tube, 2 is a neutron detector assembly, 3 is an earthquake-resistant plate spring, 4 is a bolt, 5 is a shielding plug, 6 is a detector support tube, and 7
is a detector protection tube, 8 is a neutron detector, 9 is an MI cable, 10 is an earthquake-resistant leaf spring, and 11 is an earthquake-resistant leaf spring. The same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
及び第１のバネよりもバネ定数の大きい第２のバ
ネからなるバネ部とを有し、原子炉用中性子検出
器の案内管に挿入される原子炉用中性子検出器ア
センブリにおいて、前記バネ部は少なくとも前記
保護管の上部及び下部に設けられ、前記第２のバ
ネは、前記第１のバネよりも外側にかつ前記案内
管との接点が第１のバネとほぼ同一であるように
支持されていることを特徴とする原子炉用中性子
検出器アセンブリ。 It has a protective tube that protects the neutron detector, and a spring portion consisting of a first spring and a second spring having a larger spring constant than the first spring, and is inserted into a guide tube of a neutron detector for a nuclear reactor. In the neutron detector assembly for a nuclear reactor, the spring portion is provided at least at the upper and lower portions of the protection tube, and the second spring is located outside the first spring and has a contact point with the guide tube. A neutron detector assembly for a nuclear reactor, the assembly being supported substantially identically to a first spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986120652U JPH0441360Y2 (en) | 1986-08-05 | 1986-08-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986120652U JPH0441360Y2 (en) | 1986-08-05 | 1986-08-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6327896U JPS6327896U (en) | 1988-02-24 |
| JPH0441360Y2 true JPH0441360Y2 (en) | 1992-09-29 |
Family
ID=31009171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986120652U Expired JPH0441360Y2 (en) | 1986-08-05 | 1986-08-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0441360Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8910049U1 (en) * | 1989-08-22 | 1989-11-23 | Cooper Industries, Inc., Houston, Tex. | Soldering tool |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5717895A (en) * | 1980-07-07 | 1982-01-29 | Mitsubishi Electric Corp | Neutron detector for nuclear reactor |
-
1986
- 1986-08-05 JP JP1986120652U patent/JPH0441360Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5717895A (en) * | 1980-07-07 | 1982-01-29 | Mitsubishi Electric Corp | Neutron detector for nuclear reactor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6327896U (en) | 1988-02-24 |
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