JPS6055288A - Fast breeder reactor - Google Patents
Fast breeder reactorInfo
- Publication number
- JPS6055288A JPS6055288A JP58163123A JP16312383A JPS6055288A JP S6055288 A JPS6055288 A JP S6055288A JP 58163123 A JP58163123 A JP 58163123A JP 16312383 A JP16312383 A JP 16312383A JP S6055288 A JPS6055288 A JP S6055288A
- Authority
- JP
- Japan
- Prior art keywords
- fast breeder
- breeder reactor
- fuel
- opening
- openings
- 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.)
- Granted
Links
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
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は高速増殖炉に係り、特に炉心部の冷却に対する
好適な炉心構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a fast breeder reactor, and particularly to a core structure suitable for cooling the reactor core.
第１図に燃料集合体の概念を示す。各燃料要素ｌは束ね
られ、ラッパ管２に収納される。ラッパ管２には臨接す
る燃料集合体との機械的相互作用に耐え得る様にパッド
３が設けられ、ラッパ管２を補強している。冷却材は工
／トランスノズル４のオリフィス孔５から流入し、ハン
ドリングヘッド６側から流出する。燃料要素の束は極め
て密に配列されるため流速が６ｍ／１Ｉｅｃ以上となり
、大きな圧力損失（４Ｖ４／ｃｌ）が発生し、原子炉冷
却系の圧力損失の内、５割から８割を占めることとなっ
ている。また径方向非均貞炉心の様な隣り合う燃料集合
体として燃焼初期に発熱の少ないプ２／ケット燃料集合
体が配された場合、あるいは、均質炉心においても燃料
集合体と隣り台って制御棒が配される場合等、冷却材出
口温度が隣シ同志で大きく異なることがあり、炉心上部
機構に熱疲労を与え、き裂の始生し易い条件となってい
る。Figure 1 shows the concept of a fuel assembly. Each fuel element l is bundled and housed in a wrapper tube 2. The wrapper tube 2 is provided with a pad 3 to reinforce the wrapper tube 2 so as to withstand mechanical interaction with adjacent fuel assemblies. The coolant flows into the orifice hole 5 of the transformer nozzle 4 and flows out from the handling head 6 side. Because the bundle of fuel elements is arranged extremely densely, the flow velocity is 6 m/1 Iec or more, causing a large pressure loss (4 V4/cl), which accounts for 50% to 80% of the pressure loss in the reactor cooling system. It becomes. In addition, when P2/Ket fuel assemblies, which generate less heat in the early stage of combustion, are arranged as adjacent fuel assemblies such as in a radially non-homogeneous core, or even in a homogeneous core, they are controlled adjacent to the fuel assemblies. When rods are installed, the coolant outlet temperature may vary greatly between adjacent reactor cores, causing thermal fatigue to the upper core mechanism and creating conditions that make cracks more likely to initiate.
〔発明の目的」
本９ｇ’ＪＡの目的は、圧）月員失が小さく、かつ燃料
部８坏の出口温度差の小さな炉心構造を提供するもので
るる。[Objective of the Invention] The object of this 9g'JA is to provide a reactor core structure with small pressure loss and small temperature difference at the exit of the fuel section 8.
本発明は、ラッパｗ２に設けられたパット部３に開孔部
を設け、ここからの冷却４ｔＡ出によって燃料要素束部
の流速を下げ、圧力損失を低′ｇするものでるる。また
、この開孔部を通した隣シ合う燃料集合体同志のミキシ
ングにより、出口温菱差をｔ減するものでるる。In the present invention, an opening is provided in the pad part 3 provided on the wrapper w2, and cooling 4tA is output from the opening to lower the flow velocity of the fuel element bundle part and reduce the pressure loss. Further, by mixing adjacent fuel assemblies through this opening, the difference in outlet temperature can be reduced by t.
燃料要素１は第２図に示す如く発熱する炉心燃料部７と
その上下のブランケット燃ａｓｓ、ｉらにカスプレナム
部９がら構成され、ガスプレナム部９の長さは霊長の約
４割を占めている。２ツバ′吉２（Ｃ設けられたバッド
３の軸方向位置は第２図の横に示す如く上部ブランケッ
ト部の上端付近でめる。これは中性子照射によるヌエリ
ングを逃れるため、炉中心τ外して設定されているため
である。冷却材は炉心部７を通り抜けた後は、はとんど
加熱を受ける事がないため、ラッパＵに開孔部τ設けて
冷却材を逃すことができる。この場合はそこからの冷却
材流出分だけ流速が紙り、圧力損失が低減される。しか
しながらラッパーｇ２は中性子経済性を高めるため限界
まで薄肉化されて２シ、開孔部を設ける事による応力の
増大を許容する事ができない。第３図は本発明の一実施
例を示すもので、バンド部３に開孔部ｌＯ金設けたもの
である。本開孔部ｌＯの設置によって燃料果合体内を流
れる冷却材流麓は約３０先低減し、これによる圧力損失
は流速の２乗に北回するため巣立兼さめたり約５０Ｘ低
減され、結果として染台本全体としての圧力損失は３−
２ Ｋｆ／ ｃｒＡと約２〇九低減される。また隣シ曾
う燃料集合体１ｄｊでこの開孔部１０全弁したミキシン
グによって出口部の冷却材温度差は約２０嵩低減し、熱
サイクル疲労層６ηを約５倍とする串ができる。第４図
は本９６明の別の実施例を示したもので、パッド部３に
設けられた開孔部ｌＯに溝１１を設けたもので、均質炉
心の様な隣υ合う燃料集合体同志の温度差が小さい場合
のためのものでメジ、ミキシングよシも、開孔部ｌＯか
らの流出量増大を主眼としたものである。As shown in Fig. 2, the fuel element 1 consists of a core fuel section 7 that generates heat, blanket burners above and below it, and a cascade section 9.The length of the gas plenum section 9 accounts for about 40% of the primate. . The axial position of the pad 3 provided with 2 brim 2 (C) is set near the upper end of the upper blanket part as shown on the side of Fig. This is because the coolant is rarely heated after passing through the core 7, so the wrapper U can be provided with an opening τ to allow the coolant to escape. In this case, the flow velocity is increased by the amount of coolant flowing out from there, and the pressure loss is reduced.However, in order to increase the neutron economy, the wrapper G2 is made as thin as possible to increase the neutron economy. Fig. 3 shows an embodiment of the present invention, in which an aperture 10 is provided in the band portion 3.By installing this aperture 10, it is possible to increase the The flow of coolant flowing through the base is reduced by about 30X, and the pressure loss due to this is northward to the square of the flow velocity, so it is reduced by about 50X as the flow rate increases, and as a result, the pressure loss for the dye script as a whole is 3-
2 Kf/crA, which is reduced by about 209. Also, by mixing the adjacent fuel assembly 1dj with all the openings 10 closed, the coolant temperature difference at the outlet is reduced by about 20, creating a skewer with a thermal cycle fatigue layer 6η about 5 times larger. Fig. 4 shows another embodiment of this invention, in which a groove 11 is provided in the opening lO provided in the pad part 3, so that adjacent fuel assemblies such as a homogeneous core This is for cases where the temperature difference is small, and the main purpose of both mixing and mixing is to increase the amount of outflow from the opening 10.
この場合には燃料集合体全体の圧力損失は約２５％低減
する。In this case, the pressure loss across the fuel assembly is reduced by about 25%.
一方隣シ合う燃料集合体同志の温度差が極めて大きい場
合、ミキシングを行なわせる事により燃料集合体内部で
の熱疲労が大きくなシ、問題の生ずる様な場合があり、
この様な場合には燃料集合体の六面全てに開孔部を設け
る事をせず、隣接する燃料果合体同志互に対面しない開
孔とする事も可能である。On the other hand, if the temperature difference between adjacent fuel assemblies is extremely large, mixing may cause large thermal fatigue inside the fuel assemblies, which may cause problems.
In such a case, it is possible not to provide the openings on all six sides of the fuel assembly, but to provide the openings so that the adjacent fuel assembly does not face each other.
以上述べた実施例を採用ｒる事によって次に述べる様な
副次的効果も得られる。すなわち、燃料交侠に際して引
抜かれた燃料の崩壊熱を除去するため自然循環冷却能力
が要求されるが、バンド部３に開孔部１０を持たない場
合は第５図ａに示す様に液面はハンドリ／グヘッド６よ
シも上になければならない。開孔部ｌＯを設けることに
より、液面は第５図すに示す様に引Ｆげる事がｉ’Ｊ能
となり、原子炉容器の高さを低くでき、コンパクト化に
よるコストの低減が計れるものでるる。By adopting the embodiments described above, the following secondary effects can also be obtained. In other words, a natural circulation cooling capacity is required to remove the decay heat of the extracted fuel during fuel exchange, but if the band part 3 does not have the opening 10, the liquid level will decrease as shown in Figure 5a. must also be above the handling head 6. By providing the opening IO, the liquid level can be lowered as shown in Figure 5, making it possible to lower the height of the reactor vessel and reduce costs by making it more compact. It comes out.
し発明の効果〕
以上述べた様に、本イ６明によれば圧力損失が低減され
、また燃料集合体間の出入口温Ｉ厩の小さな高速増殖炉
を提供でき、更に原子炉容器の小型化も計る事ができる
。[Effects of the Invention] As described above, according to the present invention, pressure loss is reduced, a fast breeder reactor with a small inlet/outlet temperature between fuel assemblies can be provided, and the reactor vessel can be made smaller. can also be measured.
第１図は燃料集合体の構造を示す半■１１川図、第２図
は燃料要素の構造とランバｄバッド部の軸方向位置を説
明するための半断面図、第３図ｔま本発明の実施例を示
す側面図、第４１は本発明の他の実施例を示す側面図、
第５１Ａは本発明による副次的効果を示す１ｉＩＩ１面
図でめる。
２−・・・ラッパ虜、３・・・バンド、ｌＯ・・・開孔
ｉ３！、Ｊ、 １・・・溝。
第 ／ 口
裏 ２ 図
第 ３ 目
第 ４ 口Fig. 1 is a half-sectional view showing the structure of the fuel assembly, Fig. 2 is a half-sectional view to explain the structure of the fuel element and the axial position of the lambda portion, and Fig. 3 is the present invention. 41 is a side view showing another embodiment of the present invention,
No. 51A is a 1iIII 1-plane view showing the secondary effects of the present invention. 2-... Bugle addict, 3... Band, lO... Hole i3! , J, 1... Groove. No. / Back of mouth 2 Figure 3 Eye No. 4 Mouth
Claims (1)
範囲よシも上側のラッパ１部に設けられたパッドに開孔
部金膜けたことを特徴とする高速増殖炉。 ２、特許請求の範囲第ｌＪＡに２いて、パッド部に設け
られた開孔部は隣接する燃料果台体同志互に対面した開
孔となっていることを特徴とす／８高速増殖炉。 ３、特許請求の範囲第１項において、バンド部に設けら
れた開孔部は隣接する燃料果合体同志互に対面しない開
孔となっていることを特徴とする高速増殖炉。 ４、特許請求の範囲第２項において、開孔部には溝を設
けることを特、倣とする高速増殖炉。 ５、特許ｉ末の範囲第ＩＪＡに２いて、燃料交換時の′
ｅ、面全引抜かれた燃料集合体の開孔部高さとすること
ｔ％徴とする高速増殖炉。[Scope of Claims] 1. A fast breeder reactor characterized in that, in a fuel assembly for a fast breeder reactor, a pad provided in a portion of the wrapper above the area where the core fuel exists is provided with a gold film in an opening. . 2. A /8 fast breeder reactor according to Claim 1JA 2, characterized in that the openings provided in the pad portion are openings that face adjacent fuel fruit bodies. 3. A fast breeder reactor according to claim 1, characterized in that the openings provided in the band portion are such that the adjacent fuel fruit assemblies do not face each other. 4. A fast breeder reactor according to claim 2, characterized in that the opening portion is provided with a groove. 5. Part IJA at the end of Patent I, ' at the time of fuel change.
e. A fast breeder reactor in which the height of the opening in the fuel assembly is t%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58163123A JPS6055288A (en) | 1983-09-07 | 1983-09-07 | Fast breeder reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58163123A JPS6055288A (en) | 1983-09-07 | 1983-09-07 | Fast breeder reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6055288A true JPS6055288A (en) | 1985-03-30 |
| JPH0363714B2 JPH0363714B2 (en) | 1991-10-02 |
Family
ID=15767615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58163123A Granted JPS6055288A (en) | 1983-09-07 | 1983-09-07 | Fast breeder reactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6055288A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6465490A (en) * | 1987-09-07 | 1989-03-10 | Toshiba Corp | Fuel assembly |
| FR3018386A1 (en) * | 2014-03-04 | 2015-09-11 | Hitachi Ge Nuclear Energy Ltd | COMBUSTIBLE ASSEMBLY FOR FAST REACTOR AND CHARGED REACTOR HEART WITH THE SAME |
-
1983
- 1983-09-07 JP JP58163123A patent/JPS6055288A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6465490A (en) * | 1987-09-07 | 1989-03-10 | Toshiba Corp | Fuel assembly |
| FR3018386A1 (en) * | 2014-03-04 | 2015-09-11 | Hitachi Ge Nuclear Energy Ltd | COMBUSTIBLE ASSEMBLY FOR FAST REACTOR AND CHARGED REACTOR HEART WITH THE SAME |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0363714B2 (en) | 1991-10-02 |
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