JPH0631741B2 - Fuel rod identification label - Google Patents
Fuel rod identification labelInfo
- Publication number
- JPH0631741B2 JPH0631741B2 JP62198912A JP19891287A JPH0631741B2 JP H0631741 B2 JPH0631741 B2 JP H0631741B2 JP 62198912 A JP62198912 A JP 62198912A JP 19891287 A JP19891287 A JP 19891287A JP H0631741 B2 JPH0631741 B2 JP H0631741B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel rod
- identification label
- rod
- label
- fuel
- 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
- 239000000446 fuel Substances 0.000 title claims description 43
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 8
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 claims description 4
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 claims 1
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003446 memory effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000010330 laser marking Methods 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000010936 titanium 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
【発明の詳細な説明】 「産業上の利用分野」 この発明は核燃料集合体を構成する燃料棒を識別するた
めの燃料棒識別ラベルに関する。TECHNICAL FIELD The present invention relates to a fuel rod identification label for identifying a fuel rod that constitutes a nuclear fuel assembly.
「従来の技術」 従来、核燃料集合体を構成する燃料棒には、万が一トラ
ブルが発生した際に、製造工程を追跡調査できるよう
に、製造番号あるいはロット番号等の識別符号が記され
ている。"Prior Art" Conventionally, an identification code such as a production number or a lot number is written on a fuel rod constituting a nuclear fuel assembly so that a production process can be traced and investigated in case of any trouble.
この種の識別符号を記入する一般的な方法としては、レ
ーザマーキング、腐食法、ポンチによる刻印、振動ペン
による刻印等が考えられるが、これらの方法はいずれも
燃料棒の表面に傷を付け、燃料棒の肉圧を薄くするため
に、燃料棒に対しては安全管理上使用することができな
い。また、炉心内においては不純物が厳しく管理される
ので、塗料などを用いた記入方法は実施できない。As a general method of entering this kind of identification code, laser marking, corrosion method, stamping with a punch, marking with a vibrating pen, etc. can be considered, but all of these methods scratch the surface of the fuel rod, Since the fuel pressure of the fuel rod is reduced, the fuel rod cannot be used for safety management. In addition, since the impurities are strictly controlled in the core, the entry method using paint etc. cannot be carried out.
以上の制約のため、現在では、燃料棒を製造する際に、
番号の印刷されたラベルを糊等の接着剤を用いて燃料棒
に貼付けしておき、燃料集合体の組立段階において、必
要性が無くなった時点で、燃料棒から剥がすようにして
いる。Due to the above restrictions, when manufacturing fuel rods,
The label with the number printed thereon is attached to the fuel rod by using an adhesive such as glue, and is peeled off from the fuel rod when it is no longer necessary at the assembly stage of the fuel assembly.
「発明が解決しようとする問題点」 ところで、上記ラベルでは、このラベルを燃料棒から剥
がす際に、接着剤が燃料棒の外周部に残存し、この接着
剤を落とすのに手間がかかるという問題点があった。[Problems to be Solved by the Invention] By the way, in the above label, when the label is peeled off from the fuel rod, the adhesive remains on the outer periphery of the fuel rod, and it takes time to remove the adhesive. There was a point.
「発明の目的」 この発明は上記問題点に鑑みてなされてあものであり、
燃料棒への着脱が容易な燃料棒識別ラベルを提供するこ
とを目的としている。"Object of the Invention" The present invention has been made in view of the above problems,
It is an object of the present invention to provide a fuel rod identification label that can be easily attached to and detached from a fuel rod.
「問題点を解決するための手段」 この発明の燃料棒識別ラベルは、帯状をなし、その外周
面に識別記号が付されていて、常温において棒体の外周
に密着すると共に、冷却されることにより拡径して棒体
から取り外し自在となる形状記憶合金からなるものであ
る。"Means for Solving Problems" The fuel rod identification label of the present invention has a strip shape and has an identification symbol on the outer peripheral surface thereof, so that the label sticks to the outer periphery of the rod body at room temperature and is cooled. It is made of a shape memory alloy whose diameter is expanded by and can be removed from the rod body.
「作用」 この発明の燃料棒識別ラベルは、形状記憶効果により常
温において棒体の外周に密着すると共に、冷却されるこ
とにより拡径して棒体から取り外し自在となる。"Function" The fuel rod identification label of the present invention is in close contact with the outer periphery of the rod body at room temperature due to the shape memory effect, and is expanded in diameter by being cooled to be removable from the rod body.
「実施例」 以下この発明の燃料棒識別ラベルの一実施例を第１図な
いし第３図を参照して説明する。[Embodiment] An embodiment of the fuel rod identification label of the present invention will be described below with reference to FIGS. 1 to 3.
これらの図において符号１は燃料棒識別ラベル（以下識
別ラベルという）を示す。この識別ラベル１はニッケル
・チタン系（Ｎi：Ｔi＝（５５）：（４５））の形状記
憶合金からなる薄板帯状（厚さ：０．２mm）のものであ
り、その表面には、同表面への刻印、ラベル貼付、マー
キング等により番号が記された識別部２が形成されてい
る。In these drawings, reference numeral 1 indicates a fuel rod identification label (hereinafter referred to as an identification label). This identification label 1 is a thin strip (thickness: 0.2 mm) made of a nickel-titanium-based (Ni: Ti = (55) :( 45)) shape memory alloy, and its surface has the same surface. An identification portion 2 having a number is formed by stamping, labeling, marking or the like.
そして、上記識別ラベル１は、第２図に示すように、約
２０℃の常温で燃料棒３の外周部に密着するような円環
状に形状記憶させ、変態点以下の温度（たとえばドライ
アイス温度）に冷却すると、第３図に示すように、拡径
して燃料棒３から外れるものである。Then, as shown in FIG. 2, the identification label 1 is made to have an annular shape memory so as to be in close contact with the outer peripheral portion of the fuel rod 3 at room temperature of about 20 ° C. ), The diameter increases and the fuel rod 3 comes off from the fuel rod 3, as shown in FIG.
次に、上記構成の識別ラベル１を燃料棒３の外周部に着
脱する方法を説明する。Next, a method of attaching / detaching the identification label 1 having the above-mentioned configuration to the outer peripheral portion of the fuel rod 3 will be described.
まず、円環状の識別ラベル１を約−８０℃に冷却するこ
とにより略Ｃ字状に拡径して燃料棒３の外周部にはめ込
む。First, the ring-shaped identification label 1 is cooled to about -80 ° C. to be expanded into a substantially C-shape and fitted into the outer peripheral portion of the fuel rod 3.
次いで、この拡径された識別ラベル１を加熱して約２０
℃の常温に戻す。すると、形状記憶効果により、第２図
に示すように、識別ラベル１が縮径し、燃料棒３の外周
部に密着する。Then, the expanded identification label 1 is heated to about 20.
Return to normal temperature of ℃. Then, due to the shape memory effect, as shown in FIG. 2, the identification label 1 is reduced in diameter and comes into close contact with the outer peripheral portion of the fuel rod 3.
また、燃料棒３の外周部に密着した識別ラベル１を取り
外す際には、この識別ラベル１を約−８０℃に冷却す
る。すると、形状記憶効果により第３図に示すように、
識別ラベル１が拡径し、取り外し可能になる。Further, when removing the identification label 1 that is in close contact with the outer peripheral portion of the fuel rod 3, the identification label 1 is cooled to approximately -80 ° C. Then, due to the shape memory effect, as shown in FIG.
The identification label 1 is expanded in diameter and becomes removable.
このようにして、識別ラベル１を燃料棒３に着脱する。In this way, the identification label 1 is attached to and detached from the fuel rod 3.
上記識別ラベル１によれば、この識別ラベル１を、常温
において燃料棒３の外周に密着すると共に、冷却される
ことにより拡径して燃料棒３から取り外し自在となる形
状記憶合金で形成したので、従来のラベルのように、取
り外した後に燃料棒３の外周部に接着剤が残存すること
もなく、しかも冷却温度を調整することにより燃料棒３
の外周部に容易に着脱することができ、さらには、この
着脱作業の自動化を図ることができる。According to the identification label 1, the identification label 1 is formed of a shape memory alloy which is in close contact with the outer periphery of the fuel rod 3 at room temperature and is expanded in diameter by being cooled to be removable from the fuel rod 3. Unlike the conventional label, the adhesive does not remain on the outer peripheral portion of the fuel rod 3 after it is removed, and the cooling temperature is adjusted to adjust the fuel rod 3
It can be easily attached to and detached from the outer peripheral portion of the device, and the attachment and detachment work can be automated.
また、識別ラベル１に番号が印刷された紙等からなるラ
ベルを着脱自在に貼付すれば、識別ラベル１の再利用が
できる。Moreover, if a label made of paper or the like having a number printed thereon is detachably attached to the identification label 1, the identification label 1 can be reused.
さらに、識別ラベル１はチタン・ニッケル系の形状記憶
合金であるので、耐腐食性に優れ、よって、燃料棒３と
の接触部において、腐食が生じることがない。Furthermore, since the identification label 1 is a titanium-nickel-based shape memory alloy, it has excellent corrosion resistance, and therefore corrosion does not occur at the contact portion with the fuel rod 3.
「発明の効果」 以上説明したように、この発明の燃料棒識別ラベルによ
れば、この識別ラベルを、常温において棒体の外周に密
着すると共に、冷却されることにより拡径して棒体から
取り外し自在となる形状記憶合金で形成したので、従来
のラベルのように、取り外した後に棒体の外周部に接着
剤が残存することもなく、しかも冷却温度を調整するこ
とにより棒体の外周部に容易に着脱することができ、さ
らには、この着脱作業の自動化を図ることができる。[Advantages of the Invention] As described above, according to the fuel rod identification label of the present invention, the identification label is adhered to the outer periphery of the rod body at normal temperature and is expanded by being cooled so that Since it is made of a shape memory alloy that can be removed, unlike the conventional label, there is no adhesive remaining on the outer periphery of the rod body after removal, and the outer peripheral portion of the rod body can be adjusted by adjusting the cooling temperature. The attachment / detachment can be easily performed, and the attachment / detachment work can be automated.
また、識別ラベルに番号が印刷された紙等からなるラベ
ルを着脱自在に貼付すれば、識別ラベルの再利用ができ
る。In addition, if a label made of paper or the like having a number printed on the identification label is detachably attached, the identification label can be reused.
さらに、識別ラベルはチタンニッケル系の形状記憶合金
であるので、耐腐食性に優れ、よって、棒体との接触部
において、腐食が生じることがない。Furthermore, since the identification label is a titanium-nickel-based shape memory alloy, it has excellent corrosion resistance, and therefore corrosion does not occur at the contact portion with the rod.
第１図ないし第３図はこの発明の燃料棒識別ラベルの一
実施例を示すものであり、第１図は燃料棒に装着された
燃料棒識別ラベルを示す斜視図、第２図は第１図におけ
るII−II線視断面図、第３図は拡径されて燃料棒から取
り外し可能となった燃料棒識別ラベルを示す断面図であ
る。 １……燃料棒識別ラベル、 ３……燃料棒(棒体)。1 to 3 show an embodiment of a fuel rod identification label of the present invention. FIG. 1 is a perspective view showing a fuel rod identification label attached to a fuel rod, and FIG. FIG. 3 is a cross-sectional view taken along the line II-II in FIG. 3, and FIG. 3 is a cross-sectional view showing a fuel rod identification label that has been expanded in diameter and is removable from the fuel rod. 1 ... Fuel rod identification label, 3 ... Fuel rod (rod).
Claims (2)
れていて、常温において棒体の外周に密着すると共に、
冷却されることにより拡径して上記棒体から取り外し自
在となる形状記憶合金からなる燃料棒識別ラベル。1. A strip-shaped outer peripheral surface of which an identification mark is attached, and the outer peripheral surface of the rod is closely adhered at room temperature.
A fuel rod identification label made of a shape memory alloy that expands in diameter when cooled and is removable from the rod body.
であることを特徴とする特許請求の範囲第１項に記載の
燃料棒識別ラベル。2. The fuel rod identification label according to claim 1, wherein the shape memory alloy is a nickel-titanium-based alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62198912A JPH0631741B2 (en) | 1987-08-08 | 1987-08-08 | Fuel rod identification label |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62198912A JPH0631741B2 (en) | 1987-08-08 | 1987-08-08 | Fuel rod identification label |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6441895A JPS6441895A (en) | 1989-02-14 |
| JPH0631741B2 true JPH0631741B2 (en) | 1994-04-27 |
Family
ID=16399015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62198912A Expired - Lifetime JPH0631741B2 (en) | 1987-08-08 | 1987-08-08 | Fuel rod identification label |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0631741B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60113197A (en) * | 1983-11-25 | 1985-06-19 | 日本ニユクリア・フユエル株式会社 | Welder for nuclear fuel rod |
| JPS61195394A (en) * | 1985-02-26 | 1986-08-29 | 原子燃料工業株式会社 | Method of repairing damaged fuel |
| ES8900078A1 (en) * | 1985-06-12 | 1988-11-16 | Westinghouse Electric Corp | A NUCLEAR FUEL BAR CONTAINING A TEMPERATURE SENSITIVE CLIP SPRING. |
-
1987
- 1987-08-08 JP JP62198912A patent/JPH0631741B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6441895A (en) | 1989-02-14 |
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