JPH02138898A - Fuel assembly for fast breeder reactor - Google Patents
Fuel assembly for fast breeder reactorInfo
- Publication number
- JPH02138898A JPH02138898A JP63293326A JP29332688A JPH02138898A JP H02138898 A JPH02138898 A JP H02138898A JP 63293326 A JP63293326 A JP 63293326A JP 29332688 A JP29332688 A JP 29332688A JP H02138898 A JPH02138898 A JP H02138898A
- Authority
- JP
- Japan
- Prior art keywords
- fuel assembly
- tube
- heat conduction
- fuel
- high heat
- 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
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 49
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 27
- 239000002826 coolant Substances 0.000 abstract description 11
- 230000000712 assembly Effects 0.000 abstract description 9
- 238000000429 assembly Methods 0.000 abstract description 9
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 9
- 239000010935 stainless steel Substances 0.000 abstract description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052721 tungsten Inorganic materials 0.000 abstract description 8
- 239000010937 tungsten Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 6
- 239000003758 nuclear fuel Substances 0.000 description 4
- 239000008188 pellet Substances 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000000463 material 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
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、高速増殖炉の炉心に配置される高速増殖炉用
燃料集合体に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a fuel assembly for a fast breeder reactor disposed in the core of a fast breeder reactor.
（従来の技術）
一般に、高速増殖炉の炉心には、多数の高速増殖炉用燃
料集合体が規則正しく配列されるが、と、のような高速
増殖炉用燃料集合体は、従来第３図に示すように構成さ
れている。(Prior Art) In general, a large number of fast breeder reactor fuel assemblies are regularly arranged in the core of a fast breeder reactor, but conventional fast breeder reactor fuel assemblies such as It is configured as shown.
すなわち、燃料被覆管内に炉心燃料ペレットおよびブラ
ンケット燃料ペレットを封入してなる燃料ピン１は、多
数（たとえば２７１本）六方格子状に束ねられており、
その周囲には、六角筒状のラッパ管２が配設されている
。なお、ラッパ管２の管壁を構成する材料としては、従
来高温強度および耐食性に優れたステンレス鋼などが使
用されている。また、ラッパ管２の下部には、図示しな
いエントランスノズルが設けられており、液体ナトリウ
ム等の冷却材は、このエントランスノズルからラッパ管
２内に流入し、各燃料ピン１を冷却するよう構成されて
いる。That is, a large number (for example, 271) of fuel pins 1, which are formed by enclosing core fuel pellets and blanket fuel pellets in a fuel cladding tube, are bundled in a hexagonal lattice shape.
A hexagonal cylindrical trumpet tube 2 is arranged around it. Note that, as a material constituting the tube wall of the wrapper tube 2, stainless steel or the like, which has excellent high-temperature strength and corrosion resistance, is conventionally used. Further, an entrance nozzle (not shown) is provided at the bottom of the trumpet tube 2, and a coolant such as liquid sodium flows into the trumpet tube 2 from this entrance nozzle and is configured to cool each fuel pin 1. ing.
（発明が解決しようとする課題）
しかしながら、上述のように、ステンレス鋼からなるラ
ッパ管を有する従来の高速増殖炉用燃料集合体では、万
−燃料集合体入口閉塞事故等が生じ、燃料集合体内の冷
却材による除熱機能が低下した場合、ラッパ管の熱伝導
度が低いため、集合体間を流れる冷却材による除熱効果
が小さく、健全性が損われる危険性がある。(Problems to be Solved by the Invention) However, as described above, in the conventional fuel assembly for fast breeder reactors having a wrapper tube made of stainless steel, accidents such as fuel assembly inlet blockage occur, and the inside of the fuel assembly If the heat removal function of the coolant deteriorates, the thermal conductivity of the wrapper tube is low, so the heat removal effect of the coolant flowing between the assemblies will be small, and there is a risk that the integrity will be impaired.
本発明は、かかる従来の事情に対処してなされたもので
、従来に較べて集合体間を流れる冷却材による燃料ピン
の除熱効果を増大させることができ、安全性の向上を図
ることのできる高速増殖炉用燃料集合体を提供しようと
するものである。The present invention has been made in response to such conventional circumstances, and it is possible to increase the heat removal effect of the fuel pins by the coolant flowing between the assemblies compared to the past, and to improve safety. The aim is to provide a fuel assembly for a fast breeder reactor that can be used in a fast breeder reactor.
［発明の構成］
（課題を解決するための手段）
本発明の高速増殖炉用燃料集合体は、六角筒状のラッパ
管内に多数本の燃料ピンが収容された高速増殖炉用燃料
集合体において、前記ラッパ管の管壁を、内側と外側か
ら高熱伝導性金属薄板で挟み、これらの高熱伝導性金属
薄板を高熱伝導性金属リベットで結合したことを特徴と
する。[Structure of the Invention] (Means for Solving the Problem) The fuel assembly for a fast breeder reactor of the present invention is a fuel assembly for a fast breeder reactor in which a large number of fuel pins are housed in a hexagonal cylindrical wrapper tube. , the tube wall of the wrapper tube is sandwiched between high thermally conductive metal thin plates from the inside and outside, and these high thermally conductive metal thin plates are joined with high thermally conductive metal rivets.
（作 用）
上記構成の本発明の高速増殖炉用燃料集合体では、ステ
ンレス鋼などからなり熱伝導度の低いラッパ管の管壁が
、たとえばタングステン等からなる高熱伝導性金属薄板
で挟まれており、これらの高熱伝導性金属薄板は、同様
にたとえばタング傷：８：乍ン等からなる高熱伝導性金
属リベットで結合されている。(Function) In the fuel assembly for a fast breeder reactor of the present invention having the above configuration, the tube wall of the trumpet tube made of stainless steel or the like and having low thermal conductivity is sandwiched between thin metal plates of high thermal conductivity made of, for example, tungsten. These highly thermally conductive thin metal plates are similarly joined together with a highly thermally conductive metal rivet having, for example, a tongue score of 8:5.
したがって、従来に較べてラッパ管内外の熱伝導性が良
好となり、万−燃料集合体入口閉塞事故等が生じ、燃料
集合体内の冷却材による除熱機能が低下した場合でも、
集合体間を流れる冷却材による燃料ピンの除熱効果が増
大し、燃料ピンの健全性が損われる可能性を大幅に低減
することができる。Therefore, thermal conductivity inside and outside the wrapper tube is better than before, and even if a fuel assembly inlet blockage accident occurs and the heat removal function of the coolant inside the fuel assembly is degraded,
The heat removal effect of the fuel pin by the coolant flowing between the assemblies is increased, and the possibility that the integrity of the fuel pin is impaired can be significantly reduced.
（実施例）
以下、図面に示す・一実施例について本発明の高速増殖
炉用燃料集合体を詳細に説明する。(Example) Hereinafter, the fuel assembly for a fast breeder reactor of the present invention will be described in detail with reference to an example shown in the drawings.
第１図は、本発明の一実施例の高速増殖炉用燃料集合体
の構成を示すものである。この実施例の高速増殖炉用燃
料集合体では、燃料被覆管内に炉心燃料ペレットおよび
ブランケット燃料ベレットを封入してなる燃料ピン１は
、多数（たとえば２７１本）六方格子状に束ねられてお
り、その周囲には、ステンレス鋼からなり、六角筒状に
形成されたラッパ管２が配設されている。FIG. 1 shows the configuration of a fuel assembly for a fast breeder reactor according to an embodiment of the present invention. In the fuel assembly for a fast breeder reactor of this embodiment, a large number (for example, 271) of fuel pins 1, which are formed by enclosing core fuel pellets and blanket fuel pellets in a fuel cladding tube, are bundled in a hexagonal lattice shape. A trumpet tube 2 made of stainless steel and formed into a hexagonal cylinder shape is disposed around the periphery.
管壁の内側と外側には、このラッパ管２管壁を挟むよう
に、たとえばタングステンからなる高熱伝導性金属薄板
３．４が配設されている。さらに、これらの高熱伝導性
金属薄板３．４は、多数のタングステン等からなる高熱
伝導性金属リベット５によって結合されている。Highly thermally conductive thin metal plates 3.4 made of, for example, tungsten are disposed on the inside and outside of the tube wall so as to sandwich the two wrapper tube walls. Furthermore, these highly thermally conductive thin metal plates 3.4 are joined together by a large number of highly thermally conductive metal rivets 5 made of tungsten or the like.
なお、ラッパ管２の下部には、図示しないエントランス
ノズルが設けられており、液体ナトリウム等の冷却材は
、このエントランスノズルからラッパ管２内に流入し、
各燃料ピン１を冷却するよう構成されている。Note that an entrance nozzle (not shown) is provided at the bottom of the trumpet tube 2, and a coolant such as liquid sodium flows into the trumpet tube 2 from this entrance nozzle.
Each fuel pin 1 is configured to be cooled.
上記構成のこの実施例の高速増殖炉用燃料集合体では、
ステンレス鋼からなるラッパ管２の内側および外側には
、ステンレス鋼に較べて約１０倍熱伝導度の高いタング
ステンからなる高熱伝導性金属薄板３．４が配設されて
おり、これらの高熱伝導性金属薄板３．４は、ステンレ
ス鋼に較べて約１０倍熱伝導度の高いタングステンから
なる高熱伝導性金属リベット５によって接続されている
。In the fast breeder reactor fuel assembly of this embodiment with the above configuration,
Highly thermally conductive thin metal plates 3.4 made of tungsten, which has thermal conductivity approximately 10 times higher than that of stainless steel, are arranged on the inside and outside of the wrapper tube 2 made of stainless steel. The metal sheets 3.4 are connected by high thermal conductivity metal rivets 5 made of tungsten, which has a thermal conductivity approximately 10 times higher than stainless steel.
したがって、これらの高熱伝導性金属薄板３、４および
高熱伝導性金属リベット５によってラッパ管２内外の熱
交換が促進され、従来に較べてラッパ管２内外の熱伝導
性が良好となる。このため、万−燃料集合体入口閉塞事
故等が生じ、燃料集合体内の冷却材による除熱機能が低
下した場合でも、集合体間を流れる冷却材による燃料ピ
ン１の除熱効果が増大し、燃料ピン１の健全性が損われ
る可能性を大幅に低減することができる。また、通常運
転時にも燃料集合体間の温度差を低減させることができ
る。Therefore, heat exchange between the inside and outside of the trumpet tube 2 is promoted by these highly thermally conductive thin metal plates 3 and 4 and the highly thermally conductive metal rivet 5, and the thermal conductivity inside and outside the trumpet tube 2 is improved compared to the prior art. Therefore, even if a fuel assembly inlet blockage accident occurs and the heat removal function of the coolant within the fuel assembly is reduced, the heat removal effect of the fuel pin 1 by the coolant flowing between the fuel assemblies will increase. The possibility that the integrity of the fuel pin 1 will be impaired can be significantly reduced. Furthermore, the temperature difference between fuel assemblies can be reduced even during normal operation.
なお、上記説明の高速増殖炉用燃料集合体の外側、すな
わち高熱伝導性金属薄板３の外側にフィン等を設けて、
さらに集合体間を流れる冷却材による除熱性能の向上を
図ることもできる。Note that fins or the like are provided on the outside of the fast breeder reactor fuel assembly described above, that is, on the outside of the highly thermally conductive thin metal plate 3,
Furthermore, it is also possible to improve the heat removal performance by the coolant flowing between the aggregates.
また、たとえばステンレス鋼とタングステンとでは、そ
の熱膨張係数が異なるため、ラッパ管２と高熱伝導性金
属薄板３．４とでは、熱膨脹差によって構造強度に無理
が生じ易いが、この実施例の高速増殖炉用燃料集合体で
は、ラッパ管２のすに対処することができる。In addition, for example, stainless steel and tungsten have different coefficients of thermal expansion, so the structural strength of the wrapper tube 2 and the highly thermally conductive thin metal plate 3.4 tends to be strained due to the difference in thermal expansion. In a fuel assembly for a breeder reactor, the trumpet tube 2 can be accommodated.
［発明の効果コ
以上の説明からも明らかなように、本発明の高速増殖炉
用燃料集合体によれば、従来に較べて集合体間を流れる
冷却拐による燃料ピンの除熱効果を増大させることがで
き、燃料集合体入口閉塞１ｆ故等に対する安全性の大幅
な向上を図ることができる。[Effects of the Invention] As is clear from the above explanation, the fuel assembly for fast breeder reactors of the present invention increases the heat removal effect of the fuel pins by the cooling air flowing between the assemblies compared to the conventional fuel assembly. Therefore, it is possible to significantly improve safety against accidents such as fuel assembly inlet 1f blockage.
第１図は本発明の一実施例の高速増殖炉用燃料集合体を
概略的に示す横断面図、第２図は第１図に示す高速増殖
炉用燃料集合体のラッパ管部分の構造を拡大して示す縦
断面図、第３図は従来の高速増殖炉用燃料集合体を概略
的に示す横断面図である。
１・・・・・・・・・・・・・・・燃料ピン２・・・・
・・・・・・・・・・・ラッパ管３．４・・・・・・・
・・高熱伝導性金属薄板５・・・・・・・・・・・・・
・・高熱伝導性金属リベット第２図FIG. 1 is a cross-sectional view schematically showing a fuel assembly for a fast breeder reactor according to an embodiment of the present invention, and FIG. 2 shows the structure of the trumpet tube portion of the fuel assembly for a fast breeder reactor shown in FIG. 1. FIG. 3 is an enlarged vertical cross-sectional view, and FIG. 3 is a cross-sectional view schematically showing a conventional fuel assembly for a fast breeder reactor. 1...Fuel pin 2...
・・・・・・・・・Trumpet pipe 3.4・・・・・・・・・
・・High thermal conductivity metal thin plate 5・・・・・・・・・・・・・
・High thermal conductivity metal rivet Figure 2
Claims (1)
された高速増殖炉用燃料集合体において、前記ラッパ管
の管壁を、内側と外側から高熱伝導性金属薄板で挟み、
これらの高熱伝導性金属薄板を高熱伝導性金属リベット
で結合したことを特徴とする高速増殖炉用燃料集合体。(1) In a fuel assembly for a fast breeder reactor in which a large number of fuel pins are housed in a hexagonal cylindrical trumpet tube, the tube wall of the trumpet tube is sandwiched between high thermally conductive thin metal plates from the inside and outside,
A fuel assembly for a fast breeder reactor is characterized in that these highly thermally conductive thin metal plates are joined together using highly thermally conductive metal rivets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63293326A JPH02138898A (en) | 1988-11-18 | 1988-11-18 | Fuel assembly for fast breeder reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63293326A JPH02138898A (en) | 1988-11-18 | 1988-11-18 | Fuel assembly for fast breeder reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02138898A true JPH02138898A (en) | 1990-05-28 |
Family
ID=17793379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63293326A Pending JPH02138898A (en) | 1988-11-18 | 1988-11-18 | Fuel assembly for fast breeder reactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02138898A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5382641A (en) * | 1992-10-02 | 1995-01-17 | Minnesota Mining And Manufacturing Company | Heat-sensitive imaging material |
| WO2011042406A1 (en) * | 2009-10-08 | 2011-04-14 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Body for a nuclear fuel assembly, and nuclear fuel assembly comprising such a body |
| CN109859859A (en) * | 2019-02-26 | 2019-06-07 | 西南科技大学 | It is a kind of based on the thermally conductive no heat convection integral module formula microminiature space based reactor reactor core of tungsten |
-
1988
- 1988-11-18 JP JP63293326A patent/JPH02138898A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5382641A (en) * | 1992-10-02 | 1995-01-17 | Minnesota Mining And Manufacturing Company | Heat-sensitive imaging material |
| WO2011042406A1 (en) * | 2009-10-08 | 2011-04-14 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Body for a nuclear fuel assembly, and nuclear fuel assembly comprising such a body |
| FR2951312A1 (en) * | 2009-10-08 | 2011-04-15 | Commissariat Energie Atomique | NUCLEAR FUEL ASSEMBLY BODY AND NUCLEAR FUEL ASSEMBLY COMPRISING SUCH A BODY |
| JP2013507605A (en) * | 2009-10-08 | 2013-03-04 | コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ | Nuclear fuel assembly body and nuclear fuel assembly having nuclear fuel assembly body |
| US9589681B2 (en) | 2009-10-08 | 2017-03-07 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Nuclear fuel assembly body and a nuclear fuel assembly with such a body |
| CN109859859A (en) * | 2019-02-26 | 2019-06-07 | 西南科技大学 | It is a kind of based on the thermally conductive no heat convection integral module formula microminiature space based reactor reactor core of tungsten |
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