JPS6335950B2 - - Google Patents
Info
- Publication number
- JPS6335950B2 JPS6335950B2 JP58117945A JP11794583A JPS6335950B2 JP S6335950 B2 JPS6335950 B2 JP S6335950B2 JP 58117945 A JP58117945 A JP 58117945A JP 11794583 A JP11794583 A JP 11794583A JP S6335950 B2 JPS6335950 B2 JP S6335950B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- nuclear
- plenum spring
- fuel pellet
- plenum
- 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
- 239000008188 pellet Substances 0.000 claims description 35
- 239000000446 fuel Substances 0.000 claims description 34
- 239000003758 nuclear fuel Substances 0.000 claims description 11
- 238000005253 cladding Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004992 fission Effects 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000009434 installation Methods 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
- Catalysts (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Description
【発明の詳細な説明】
本発明は、被覆管内に多数個の燃料ペレツトを
充填し、その燃料ペレツトと端栓との間にプレナ
ムスプリングを介装した原子炉用核燃料要素に係
り、特にそのプレナムスプリング部の改良に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nuclear fuel element for a nuclear reactor in which a cladding tube is filled with a large number of fuel pellets and a plenum spring is interposed between the fuel pellets and an end plug. Regarding improvement of the spring part.
一般に、原子炉用核燃料要素としては、多数個
の燃料ペレツトを被覆管内に充填積層したものが
多く使用されている。 In general, a nuclear fuel element for a nuclear reactor is often used in which a large number of fuel pellets are filled and stacked in a cladding tube.
第１図は、上記従来の原子炉用核燃料要素の縦
断面図であつて、被覆管１内に多数個の燃料ペレ
ツト２が充填積層され、その被覆管１の両端にそ
れぞれ端栓３および４が装着されている。上記燃
料ペレツト２の頂端と上部端栓３との間には核分
裂生成ガスを収容するプレナム５が形成されてお
り、そのプレナム５内には、上記互いに積層され
た燃料ペレツト２を押圧しその移動を防止するた
めのプレナムスプリング６が配設されている。と
ころで、上記プレナムスプリング６と燃料ペレツ
ト２との間には、スプリングの燃料ペレツト２へ
の押圧面積を増すとともに均一荷重が加わるよう
にするため、燃料ペレツト押え板７が介装せしめ
られており、しかも上記燃料ペレツト押え板は、
その被覆管１内への挿入を容易にするために、あ
らかじめプレナムスプリング６の一端に溶接接合
されている。 FIG. 1 is a longitudinal cross-sectional view of the conventional nuclear fuel element for a nuclear reactor, in which a cladding tube 1 is filled with a large number of fuel pellets 2, and end plugs 3 and 4 are provided at both ends of the cladding tube 1, respectively. is installed. A plenum 5 is formed between the top end of the fuel pellet 2 and the upper end plug 3 to accommodate the fission product gas. A plenum spring 6 is provided to prevent this. Incidentally, a fuel pellet pressing plate 7 is interposed between the plenum spring 6 and the fuel pellet 2 in order to increase the pressing area of the spring against the fuel pellet 2 and to apply a uniform load. Moreover, the above fuel pellet holding plate is
In order to facilitate its insertion into the cladding tube 1, it is welded to one end of the plenum spring 6 in advance.
したがつて、上述の如き従来の原子炉用核燃料
要素は、その製造に際してあらかじめプレナムス
プリングに対し燃料ペレツト押え板を溶接する必
要があり、そのため特別の溶接設備や治工具類な
どの設備が必要であり、その設備費や溶接電極な
どの消耗品費用がかかる等の問題がある。 Therefore, when manufacturing conventional nuclear fuel elements for nuclear reactors as described above, it is necessary to weld the fuel pellet holding plate to the plenum spring in advance, which requires special welding equipment, jigs, and other equipment. However, there are problems such as equipment costs and consumables costs such as welding electrodes.
本発明はこのような点に鑑み、プレナムスプリ
ングに対する溶接作業等を必要とせず、製造コス
トの低減を計り得るようにした原子炉用核燃料要
素を得ることを目的とするものであつて、プレナ
ムスプリングの燃料ペレツト側端部に、燃料ペレ
ツト押え部材を弾装したことを特徴とするもので
ある。 In view of these points, the present invention aims to obtain a nuclear fuel element for a nuclear reactor that does not require welding work etc. for the plenum spring and can reduce manufacturing costs. A fuel pellet pressing member is elastically mounted on the fuel pellet side end of the fuel pellet.
以下、第２図乃至第４図を参照して本発明をそ
の実施例について説明する。なお、第１図と同一
部分には同一符号を付す。 Embodiments of the present invention will be described below with reference to FIGS. 2 to 4. Note that the same parts as in FIG. 1 are given the same reference numerals.
第２図において、被覆管１の両端にはそれぞれ
端栓３および４が装着され、その被覆管１内には
多数個の燃料ペレツト２が充填積層されており、
さらに上記燃料ペレツト２の頂部と上部端栓３と
の間にはプレナムスプリング６が介装されてい
る。この構成は従来のものと全く同一であるが、
本発明においては、上記プレナムスプリング６の
燃料ペレツト側端部（下端部）に、第３図に示す
ような燃料ペレツト押え部材８が弾装されてい
る。 In FIG. 2, end plugs 3 and 4 are attached to both ends of a cladding tube 1, and a large number of fuel pellets 2 are filled and stacked inside the cladding tube 1.
Furthermore, a plenum spring 6 is interposed between the top of the fuel pellet 2 and the upper end plug 3. This configuration is exactly the same as the conventional one, but
In the present invention, a fuel pellet pressing member 8 as shown in FIG. 3 is elastically mounted on the fuel pellet side end (lower end) of the plenum spring 6.
すなわち、上記燃料ペレツト押え部材８は、第
３図に示すようにカツプ状を呈し、その内径がプ
レナムスプリング６の外径よりわずかに小さく形
成されている。したがつて、上記燃料ペレツト押
え部材８は、プレナムスプリング６の下端部の周
方向の弾性を利用して、プレナムスプリング６の
径を縮少せしめることによりプレナムスプリング
６の下端部に嵌挿され、その後上記プレナムスプ
リング６の拡張力によつて保持されている。 That is, the fuel pellet holding member 8 has a cup shape as shown in FIG. 3, and its inner diameter is slightly smaller than the outer diameter of the plenum spring 6. Therefore, the fuel pellet holding member 8 is fitted into the lower end of the plenum spring 6 by reducing the diameter of the plenum spring 6 by utilizing the circumferential elasticity of the lower end of the plenum spring 6. Thereafter, it is held by the expansion force of the plenum spring 6.
また、燃料ペレツト押え部材８は、第４図に示
すように、栓状を呈し、その外径がプレナムスプ
リング６の内径よりやや大きく形成され、その燃
料ペレツト押え部材８をプレナムスプリング６の
端部に圧入し、プレナムスプリング６の弾性によ
つて上記燃料ペレツト押え部材８を保持せしめる
ようにしてもよい。 As shown in FIG. Alternatively, the fuel pellet pressing member 8 may be held by the elasticity of the plenum spring 6.
しかして、燃料ペレツト２はプレナムスプリン
グ６に弾性的に嵌装或は挿入された燃料ペツト押
え部材を介してプレナムスプリング６によつて押
圧され、その移動が防止される。 Thus, the fuel pellets 2 are pressed by the plenum spring 6 via the fuel pellet pressing member elastically fitted or inserted into the plenum spring 6, and their movement is prevented.
このように本発明においては、プレナムスプリ
ングの燃料ペレツト側端部に燃料ペレツト押え部
材を弾装したので、従来のようにペレツト押え板
をプレナムスプリングに溶接によつて装着する必
要がなく、燃料ペレツト押え部材を単に圧入或は
外嵌させるだけでよいので、その取付けがきわめ
て簡単であり、しかも特別な溶接装置等を必要と
することもなく、製造コストを大幅に低減するこ
とができる。 In this way, in the present invention, since the fuel pellet holding member is elastically mounted on the fuel pellet side end of the plenum spring, there is no need to attach the pellet holding plate to the plenum spring by welding as in the conventional case, and the fuel pellets are Since the holding member only needs to be press-fitted or externally fitted, its installation is extremely simple, and there is no need for special welding equipment or the like, making it possible to significantly reduce manufacturing costs.
第１図は従来の原子炉用核燃料要素の縦断面
図、第２図は本発明の原子炉用核燃料要素の縦断
面図、第３図および第４図はそれぞれ燃料ペレツ
ト押え部材の実施例を示す縦断面図である。
１……被覆管、２……燃料ペレツト、３，４…
…端栓、５……プレナム、６……プレナムスプリ
ング、８……燃料ペレツト押え部材。
FIG. 1 is a longitudinal sectional view of a conventional nuclear fuel element for a nuclear reactor, FIG. 2 is a longitudinal sectional view of a nuclear fuel element for a nuclear reactor according to the present invention, and FIGS. 3 and 4 each show an example of a fuel pellet holding member. FIG. 1...Claying tube, 2...Fuel pellets, 3, 4...
... End plug, 5 ... Plenum, 6 ... Plenum spring, 8 ... Fuel pellet holding member.
Claims (1)
その燃料ペレツトと端栓との間にプレナムスプリ
ングを介装した原子炉用核燃料要素において、上
記プレナムスプリングの燃料ペレツト側端部に、
燃料ペレツト押え部材を弾装したことを特徴とす
る、原子炉用核燃料要素。 ２ 燃料ペレツト押え部材は、内径がプレナムス
プリングの外径よりわずかに小さいカツプ状のも
のであることを特徴とする、特許請求の範囲第１
項記載の原子炉用核燃料要素。 ３ 燃料ペレツト押え部材は、外径がプレナムス
プリングの内径よりやや大きい栓状のものである
ことを特徴とする、特許請求の範囲第１項記載の
原子炉用核燃料要素。[Claims] 1. Filling a cladding tube with a large number of fuel pellets,
In a nuclear fuel element for a nuclear reactor in which a plenum spring is interposed between the fuel pellet and the end plug, at the end of the plenum spring on the fuel pellet side,
A nuclear fuel element for a nuclear reactor, characterized by being loaded with a fuel pellet holding member. 2. Claim 1, characterized in that the fuel pellet holding member is cup-shaped, the inner diameter of which is slightly smaller than the outer diameter of the plenum spring.
Nuclear fuel elements for nuclear reactors as described in Section. 3. The nuclear fuel element for a nuclear reactor according to claim 1, wherein the fuel pellet holding member is a plug-shaped member whose outer diameter is slightly larger than the inner diameter of the plenum spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58117945A JPS608782A (en) | 1983-06-29 | 1983-06-29 | Nuclear fuel element for nuclear reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58117945A JPS608782A (en) | 1983-06-29 | 1983-06-29 | Nuclear fuel element for nuclear reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS608782A JPS608782A (en) | 1985-01-17 |
| JPS6335950B2 true JPS6335950B2 (en) | 1988-07-18 |
Family
ID=14724114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58117945A Granted JPS608782A (en) | 1983-06-29 | 1983-06-29 | Nuclear fuel element for nuclear reactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS608782A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8666018B2 (en) * | 2011-01-06 | 2014-03-04 | Westinghouse Electric Company Llc | Nuclear fuel rod plenum spring assembly |
-
1983
- 1983-06-29 JP JP58117945A patent/JPS608782A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS608782A (en) | 1985-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4269661A (en) | Top nozzle for a nuclear reactor fuel assembly | |
| JPH0546515B2 (en) | ||
| JPS6335950B2 (en) | ||
| JPS6326797Y2 (en) | ||
| JPS6335951B2 (en) | ||
| JPS6120559Y2 (en) | ||
| JPS6336313Y2 (en) | ||
| US3713975A (en) | Nuclear reactor fuel element | |
| JPS6038689A (en) | Nuclear fuel element for nuclear reactor | |
| JPH0616377Y2 (en) | Flammable poison stick | |
| US20040196952A1 (en) | Fuel rod for a nuclear plant and a plenum spring arranged to be provided in such a fuel rod | |
| JPH0633437Y2 (en) | Neutron source rod | |
| JPS62100692A (en) | Nuclear fuel rod | |
| JPS5937346A (en) | Shock absorber | |
| JPS6220987Y2 (en) | ||
| JPS58189995U (en) | nuclear fuel elements | |
| JPS6023759Y2 (en) | nuclear fuel rod | |
| JPS6331027Y2 (en) | ||
| JP3032718B2 (en) | Vibration-filled reactor fuel rod and fuel particle separator thereof | |
| JPH09105793A (en) | Control rod absorbing tube for performing tightening coupling and viscous damping between end plug and absorbing rod | |
| JPS642497Y2 (en) | ||
| JPS6120829B2 (en) | ||
| JPS6120560Y2 (en) | ||
| JPH0348194A (en) | Nuclear fuel element | |
| JPH0427897A (en) | Stabilizer for nuclear reactor pressure vessel |