JPS5990080A - Upper core structure of lmfbr type reactor - Google Patents
Upper core structure of lmfbr type reactorInfo
- Publication number
- JPS5990080A JPS5990080A JP57197665A JP19766582A JPS5990080A JP S5990080 A JPS5990080 A JP S5990080A JP 57197665 A JP57197665 A JP 57197665A JP 19766582 A JP19766582 A JP 19766582A JP S5990080 A JPS5990080 A JP S5990080A
- Authority
- JP
- Japan
- Prior art keywords
- reactor
- layer
- lmfbr
- core structure
- core
- 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
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
- Electromagnets (AREA)
- Housings And Mounting Of Transformers (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】
本発明は液体金属ナトリウム等を冷却材として使用する
冷型金属型高速増殖炉の炉内上部構造に係るものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an internal upper structure of a cold metal fast breeder reactor that uses liquid metal sodium or the like as a coolant.
第１図は従来の高速増殖炉の原子炉構造の概要を示し、
原子炉容器（１）の上部を閉塞する遮蔽プラク（２）は
建屋ペデスタル（３）のソールプレート（４）上に原子
炉容器（１）とともに据付けられ、前記プラグ（２）に
装架された上部機構（５）に、原子炉容器（１）内に据
付けられた炉心（６）上部に対設された整流格子（７）
が懸吊されている。図中（８）は制御棒案内管、（９）
は入口ノズル、（１０）は出口ノズルである。Figure 1 shows an overview of the reactor structure of a conventional fast breeder reactor.
A shielding plaque (2) that closes off the upper part of the reactor vessel (1) is installed together with the reactor vessel (1) on the sole plate (4) of the building pedestal (3), and is mounted on the plug (2). The upper mechanism (5) includes a rectifier grid (7) installed in the upper part of the reactor core (6) installed in the reactor vessel (1).
is suspended. In the figure (8) is the control rod guide tube, (9)
is an inlet nozzle, and (10) is an outlet nozzle.
前記高速増殖炉の原子炉構造はカバーガス層を有する性
液面構造であって、ナトリウムが伝熱良導体であるため
、プラント熱過渡時にはその液面近傍、即ちカバーガス
層と液体金属ナトリウム間での温度勾配が極端に付き、
また大径構造物であるため過大な応力が発生し、問題と
なっていた。The reactor structure of the fast breeder reactor is a liquid surface structure with a cover gas layer, and since sodium is a good heat conductor, during plant thermal transients, the reactor structure has a liquid surface structure with a cover gas layer. There is an extreme temperature gradient,
Additionally, because it is a large-diameter structure, excessive stress is generated, which is a problem.
この応力緩和対策として、従来の炉心上部構造において
は、サーマルライナ旧）等が上部機構の円筒状部を掩覆
するように配設されているが、本質的には同ザーマルラ
イナのない場合に比して大差がないため、依然として問
題が残されていた。As a measure to alleviate this stress, in the conventional core upper structure, a thermal liner (formerly known as "Thermal Liner") is placed to cover the cylindrical part of the upper mechanism, but essentially it is compared to the case without the thermal liner. Since there was no significant difference between the two, the problem still remained.
また原子炉トリップ等による低流量運転時における上方
に高温ナトリウム、下方に低層ナトリウムの二層化を招
来する成層化現象にあっても、同様の問題が生じていた
。A similar problem has also occurred in the stratification phenomenon that results in two layers of high-temperature sodium at the top and low-layer sodium at the bottom during low-flow operation due to a reactor trip or the like.
本発明は前記したような問題点を解決するために提案さ
れたもので、上部遮蔽胴の下面より同心円状に重設して
なる支柱の下端に、炉心上部に対設された整流格子を支
持するとともに、内周縁が下方に傾斜した複数のバッフ
ル板を前記各支柱にその上下方向に亘って間隔を存して
嵌着してなることを特徴とする液体金属冷却型高速増殖
炉の炉内上部構造に係るものである。The present invention was proposed in order to solve the above-mentioned problems.The present invention has been proposed in order to solve the problems described above. and a plurality of baffle plates whose inner peripheral edges are inclined downward are fitted to each of the pillars at intervals in the vertical direction thereof. This relates to the superstructure.
本発明に係る高速増殖炉の炉内上部構造は、−１ユ部遮
蔽胴と炉心の上部に対設された整流格子へ〇）間に同整
流格子を支持する複数の支柱が同心固状に配設された円
筒箔状体に構成されているので、炉内上部構造の炉内の
カバーガス層、ナトリウ、′、層に跨る部分は前記支柱
群によって７溝成され液面近傍、及び成層化現象時発生
する円筒部ＱＱｊ方向の発生熱応力は従来の大径円筒上
部機構の用台に比して極端に小さくなる。In the reactor upper structure of the fast breeder reactor according to the present invention, a plurality of columns supporting the rectifying grid are arranged concentrically and rigidly between the -1 U shielding shell and the rectifying grid installed opposite to the upper part of the reactor core. Since it is constructed of a cylindrical foil-like body, the part of the upper structure inside the furnace that spans the cover gas layer, sodium chloride layer, and layer in the furnace is formed into seven grooves by the above-mentioned support groups, and is located near the liquid level and in the stratified layer. The thermal stress generated in the direction of the cylindrical portion QQj during the oxidation phenomenon is extremely small compared to the base of the conventional large diameter cylindrical upper mechanism.
また前記各支柱にはその上下方向に亘って間隔を有して
、内周縁が下方に傾斜した複数のバツ〕フル板が嵌着さ
れているので、炉心を噴出した液体金属す） ＩＪウム
は整流格子を経て前記支柱内側のナトリウム層を上昇し
つつ、支柱間隙より支柱外側のナトリウム層内に前記バ
ックル板の傾斜内周縁に案内されて順次流出していき、
か（して支柱内側のナトリウム層が流動することによっ
て支柱内外の温度差が生起し姉くなり、発生応力が極小
に抑止されるものであり、構造の健全性及び信頼性が向
上されるものである。In addition, each of the pillars is fitted with a plurality of full plates whose inner circumferential edges are inclined downward at intervals in the vertical direction, so that the liquid metal ejected from the reactor core is While ascending the sodium layer inside the pillar through the rectifying grid, it sequentially flows out from the pillar gap into the sodium layer outside the pillar while being guided by the inclined inner peripheral edge of the buckle plate,
(As a result, the sodium layer inside the column flows, creating a temperature difference between the inside and outside of the column, which suppresses the generated stress to a minimum, improving the soundness and reliability of the structure. It is.
以下本発明を図示の実施例について説明する。The present invention will be described below with reference to the illustrated embodiments.
（２１）は原子炉容器とともに建屋イデスタル部ソール
プレート上に据伺けられた遮蔽プラグ、（２暗よ原子炉
容器内に据伺けられた炉心、（２３）は炉心（２２）と
同一軸芯上に遮蔽プラグ（２１）Ｋ装架された土部題蔽
胴である。(21) is a shielding plug installed on the sole plate of the ideal part of the building together with the reactor vessel, (2) is the reactor core installed in the reactor vessel, and (23) is coaxial with the reactor core (22). This is a Dobe issue shielding shell with a shielding plug (21) K mounted on the core.
前記上部遮蔽胴（２３）の下面には同心円周上に複数の
支柱（２４）が垂設され、その丁Ｗｊｒ４ ｆ４１５は
炉心（２２）の上部に対設された整流格子（２５）の周
縁保持枠（２６）を支持しており、前記上部遮蔽胴Ｃ２
３）及び支柱（２（）群によって円筒箔状の炉内上部構
造が構成されている。A plurality of columns (24) are vertically installed on the lower surface of the upper shielding shell (23) on a concentric circumference, and the columns (24) support the peripheral edge of the rectifying grid (25) installed oppositely on the upper part of the reactor core (22). It supports the frame (26) and the upper shielding cylinder C2
A cylindrical foil-like upper structure inside the furnace is constituted by the group 3) and the support columns 2().
前記各支柱Ｃ２４）にはカバーガス層（σ）とナト１７
ウム層との境界部近傍に配設されたディッププレート０
′７）が取付けられ、更に内周縁が下方に傾斜した円錐
状の開口部（２８σ）に形成さｈた環状バッフル板（２
８）が、前記各支柱（２４Ｊの上下方向に間隔を存して
取付けられている。なお前記環状バックル板（２８）の
開口部（２８σ）は下方より上方に至るに伴って径が漸
減するように構成されている。A cover gas layer (σ) and a nut 17 are provided on each of the pillars C24).
Dip plate 0 arranged near the boundary with the um layer
'7) is attached, and an annular baffle plate (28σ) formed in a conical opening (28σ) whose inner peripheral edge is inclined downward
8) are attached at intervals in the vertical direction of each of the pillars (24J).The diameter of the opening (28σ) of the annular buckle plate (28) gradually decreases from the bottom to the top. It is configured as follows.
更に前記上部遮蔽胴（ハ）の中心部には複数の：ｆｆ制
御棒案内管（２９）が同心円周上に沿って配設され、下
端は炉心（２５）に接合されている。また遮蔽プラグ（
２Ｄの下端ナトリウム層（ｈｌにはティッププレート（
３ｏ）が全面に亘って配設され、複数の支柱Ｃ３１１に
よって保持されている。Furthermore, a plurality of :ff control rod guide tubes (29) are arranged along a concentric circumference in the center of the upper shielding shell (c), and their lower ends are joined to the reactor core (25). Also, the shielding plug (
2D lower sodium layer (hl has a tip plate (
3o) is disposed over the entire surface and is held by a plurality of support columns C311.
なお前記整流格子（２５）は炉芯燃料の配設形状に合致
したハニカム状格子構造に構成されている。The rectifying grid (25) has a honeycomb-like grid structure that matches the arrangement shape of the core fuel.
従って炉心（２２）を噴出した液体金属す） ＩＪウム
は整流格子（２５）を経て、支柱（２滲内側のす） Ｉ
Ｊウム層（Ｃ）を上昇しつ・つ、支柱（２４）の隙間か
ら外側す） ＩＪウム層（ｂ）へ、前記環状バックル板
（２段の開口部（２８ａ）に案内されて順次流出してい
く。なおディッププレート（２ηはす） ＩＪウムの上
昇流における液面の揺動、波立ちを抑制する。Therefore, the liquid metal that spouted out of the reactor core (22) passes through the rectifier grid (25) and is transferred to the column (inner side of the 2nd column).
The annular buckle plate (guided by the two-stage opening (28a) and sequentially flows out to the IJ layer (b) while ascending the J layer (C) and outward from the gap between the pillars (24)). The dip plate (2η) suppresses fluctuations and ripples in the liquid level in the upward flow of IJum.
而して図示の構造においては、カバーガス層（ａ）液体
金属ナトリウム層（ｂ）（Ｃ）に亘って円筒箔状体に形
成された前記炉内上部構造における、同心状に配列され
た支柱（２４１群が位置しているので、液面近傍及び成
層化現象時に発生する円筒部ｉＩ！１１１方向の熱応力
ｔｒ ＫＬＵ・Ｔであって、（Ｋ：定数、Ｒ：支柱半
径、ｔ：支柱内厚、Ｔ：軸方向の温度差）従来の円筒状
上部構造体に比してその発生応力は極小となる。また前
記支柱（２を群内側のナトリウム層（Ｃ）を流動させて
いるため、支柱（２４１内外の１ｕ度差も伺き姉く、発
生応力も極小になる。In the illustrated structure, the support columns are concentrically arranged in the furnace upper structure formed in a cylindrical foil-like body over the cover gas layer (a), the liquid metal sodium layer (b), and (C). (Since the 241 group is located, the thermal stress tr KLU・T in the cylindrical part iI!111 direction that occurs near the liquid surface and during the stratification phenomenon, (K: constant, R: strut radius, t: strut Inner thickness, T: temperature difference in the axial direction) The generated stress is minimal compared to conventional cylindrical upper structures.Also, since the sodium layer (C) inside the column (2) is made to flow , The 1u degree difference between the inside and outside of the pillar (241) is also considered, and the generated stress is also minimized.
以上本発明を実施例について説明したが、本発明は勿論
このよう１！実施例にだけ局限されるものではなく、本
発明の精神を逸脱しない範囲内で種々の設計の改変を施
しうるものである。Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention can be implemented in the following manner. The present invention is not limited to the embodiments, and various design modifications may be made without departing from the spirit of the present invention.
第１図は従来の高速増殖炉の縦断ｊ’ｌ’Ｌ！、第２図
は本発明に係る流体金属冷却型高速増殖炉の炉内上部構
造の一実施例を示す縦断面図、第６１２１は第２図の矢
視ＴＩＴ −ｌｉｔ図である。
（２２）・・・炉心、（２３）・・・上部遮蔽胴、ｅ・
１）・・・支柱、（２５）・・・整流格子、（２８）−
・・環状バッフル板腹代理人弁理士岡 本 重 文
外２名
第１図
手続補正書
昭和５８年１２月２０日
特許庁長官 若 杉 和 夫 殿
１、事件の表示
昭和５７年特 許 願第１９７６６５今２、発明の名称
成体金属冷却型高速増殖炉の炉内上部構造３、補正をす
る者
事件との関係 特 許出願人名 称（６２０
）三菱重工業株式会社
４、復代理人
５、補正命令の目付 昭和（０年発）４ 口（発
送日）６、補正の対象 明細書
７、 補正の内容
明細Ｒ）中
臼′ル６頁第５行の［応力ｃｒ−Ｋ ｌｉ＋、 −Ｔ
Ｊを「応力ｃｒ ＝ＦＫ ＯＷ・Ｔ」と補正し會す。Figure 1 shows the longitudinal section of a conventional fast breeder reactor. , FIG. 2 is a vertical sectional view showing an example of the upper structure inside the reactor of the fluid metal cooled fast breeder reactor according to the present invention, and 6121 is a TIT-lit view taken in the direction of the arrow in FIG. (22)...Core, (23)...Upper shield shell, e.
1)... Support column, (25)... Rectifier grid, (28)-
...Circular baffle panel Patent attorney Shige Okamoto Two other people Figure 1 Procedural amendment December 20, 1980 Commissioner of the Patent Office Kazuo Wakasugi 1, Indication of case 1982 Patent application no. 197665 Ima 2, Title of Invention Inner Upper Structure of Solid Metal Cooled Fast Breeder Reactor 3, Relationship with Amendment Case Patent Applicant Name (620
) Mitsubishi Heavy Industries, Ltd. 4, sub-agent 5, weight of amendment order Showa (issued in 0) 4 mouth (shipment date) 6, subject of amendment Specification 7, details of amendment R) Middle mill page 6 5th row [stress cr-K li+, -T
J is corrected and determined as "stress cr =FKOW・T".
Claims (1)
端に炉心上部に対設された整流格子を支持するとともに
、内周縁が下方に傾斜した複数のバッフル板を前記各支
柱にその上下方向に亘って間隔を存して嵌着してなるこ
とを特徴とする液体金属冷却型高速増殖炉の炉内上部構
造。The lower end of the struts, which are superimposed concentrically from the lower surface of the upper shielding shell, supports a rectifying grid installed opposite to the upper part of the core, and a plurality of baffle plates, the inner peripheral edges of which are inclined downward, are attached to each of the struts above and below. An internal upper structure of a liquid metal cooled fast breeder reactor, characterized in that the upper structure is fitted at intervals in a direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57197665A JPS5990080A (en) | 1982-11-12 | 1982-11-12 | Upper core structure of lmfbr type reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57197665A JPS5990080A (en) | 1982-11-12 | 1982-11-12 | Upper core structure of lmfbr type reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5990080A true JPS5990080A (en) | 1984-05-24 |
Family
ID=16378288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57197665A Pending JPS5990080A (en) | 1982-11-12 | 1982-11-12 | Upper core structure of lmfbr type reactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5990080A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4759898A (en) * | 1985-10-03 | 1988-07-26 | Commissariat A L'energie Atomique | Fast neutron nuclear reactor having an improved core cover plug |
| US4973444A (en) * | 1987-03-02 | 1990-11-27 | United Kingdom Atomic Energy Authority | Nuclear reactor installations |
-
1982
- 1982-11-12 JP JP57197665A patent/JPS5990080A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4759898A (en) * | 1985-10-03 | 1988-07-26 | Commissariat A L'energie Atomique | Fast neutron nuclear reactor having an improved core cover plug |
| US4973444A (en) * | 1987-03-02 | 1990-11-27 | United Kingdom Atomic Energy Authority | Nuclear reactor installations |
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