JPS6319595A - Intermediate heat exchanger - Google Patents
Intermediate heat exchangerInfo
- Publication number
- JPS6319595A JPS6319595A JP61163704A JP16370486A JPS6319595A JP S6319595 A JPS6319595 A JP S6319595A JP 61163704 A JP61163704 A JP 61163704A JP 16370486 A JP16370486 A JP 16370486A JP S6319595 A JPS6319595 A JP S6319595A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- outer shell
- intermediate heat
- inlet
- sodium
- 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
- 239000002826 coolant Substances 0.000 claims description 10
- 229910052708 sodium Inorganic materials 0.000 description 25
- 239000011734 sodium Substances 0.000 description 25
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group 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 24
- 239000007789 gas Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000003068 static effect Effects 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
-
- 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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明はタンク型高速増殖炉において使用される中間熱
交換器に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to an intermediate heat exchanger used in a tank-type fast breeder reactor.
（従来の技術）
タンク型高速増殖炉では、炉心で発生した熱はタンク内
の一次冷却材、例えば−次系ナトリウムを介して中間熱
交換器に運ばれ、ここで二次冷却材、例えば二次系ナト
リウムと熱交換されるシステムになっている。この中間
熱交換器としては、縦置直管型で上下部に管板を有する
シェルアンドチューブ型の熱交換器が広く使用されてい
る。(Prior Art) In a tank-type fast breeder reactor, heat generated in the reactor core is transferred to an intermediate heat exchanger via a primary coolant, such as secondary sodium, in a tank, where it is transferred to an intermediate heat exchanger, where it is transferred to a secondary coolant, such as secondary The system is such that heat is exchanged with the secondary sodium. As this intermediate heat exchanger, a shell-and-tube type heat exchanger, which is a vertical straight pipe type and has tube sheets at the upper and lower portions, is widely used.
第３図は、このような中間熱交換器を例示するもので、
この中間熱交換器は長尺で中空状の外胴１を有し、この
外胴１の上端に形成したフランジ２をタンク型高速増殖
炉の主容器３に支持することによって中間熱交換器全体
がタンク型高速増殖炉の主容器３内に吊り下げられてい
る。FIG. 3 shows an example of such an intermediate heat exchanger.
This intermediate heat exchanger has a long and hollow outer shell 1, and a flange 2 formed at the upper end of this outer shell 1 is supported by a main vessel 3 of a tank-type fast breeder reactor, so that the entire intermediate heat exchanger is is suspended in the main vessel 3 of the tank-type fast breeder reactor.
この外胴１の下端はテーパ状に縮径され、出口ノズル４
として主容器３内の−次系ナトリウム５中に開口してい
る。The lower end of this outer body 1 is tapered in diameter and has an outlet nozzle 4.
It opens into the -order system sodium 5 in the main container 3.
外胴１の上部には入口プレナム６となる空間が゛形成さ
れ、その下部には下部管板７と下部管板８の間に貫通支
持され、途中を適当間隔毎に伝熱管支持板９によって支
持された多数の伝熱管１０が収容されている。A space serving as an inlet plenum 6 is formed in the upper part of the outer shell 1, and the lower part of the outer shell 1 is penetrated and supported between a lower tube plate 7 and a lower tube plate 8. A large number of supported heat exchanger tubes 10 are accommodated.
外胴１には、上部管板３の上方において少数の導入口１
１が開けられており、その外側には、導入口１１から外
胴１内へ流入する一次系ナトリウム５を整流させるスカ
ート１２が形成されている。The outer shell 1 has a small number of inlets 1 above the upper tube plate 3.
1 is opened, and a skirt 12 is formed on the outside thereof to rectify the primary sodium 5 flowing into the outer shell 1 from the inlet 11.
また、中間熱交換器の中心部には入口１３より二次系ナ
トリウムを上部管板７と下部管板８の間の空間１４に送
給する内側管１５と、−次系ナトリウム５との熱交換に
よって加温された二次系ナトリウムを出口１６より導出
する外側管１７が設けられている。In addition, in the center of the intermediate heat exchanger, there is an inner pipe 15 that feeds secondary sodium from an inlet 13 to a space 14 between the upper tube sheet 7 and the lower tube sheet 8, and An outer pipe 17 is provided to lead out the secondary sodium heated by the exchange from the outlet 16.
なお、外胴１の上端部には、−次系ナトリウムからの輻
射熱防止のための熱遮蔽体１８が設けられている。A heat shield 18 is provided at the upper end of the outer shell 1 to prevent radiation heat from the -order sodium.
このように構成された中間熱交換器では、高温の一次系
ナトリウム５は外胴１とスカート１２との間を通り、導
入口１１から外胴１内へ流入する。In the intermediate heat exchanger configured in this manner, the high temperature primary sodium 5 passes between the outer shell 1 and the skirt 12 and flows into the outer shell 1 from the inlet 11.
一方、二次系ナトリウムは入口１３より内側管１５を流
下し、上部管板７と下部管板８の間の空間１４内に流入
し、伝熱管１０内を流下する一次系ナトリウムとの間で
熱交換される。この熱交換によって低温となった一次系
ナトリウムは、出口ノズル４より流出し、一方、高温状
態になった二次系ナトリウムは外側管１７内を下界して
出口１６より蒸気発生器（図示せず）へ送給される。On the other hand, the secondary sodium flows down the inner tube 15 from the inlet 13, flows into the space 14 between the upper tube sheet 7 and the lower tube sheet 8, and is separated from the primary sodium flowing down inside the heat transfer tube 10. Heat exchanged. The primary sodium, which has become low temperature through this heat exchange, flows out from the outlet nozzle 4, while the secondary sodium, which has become high temperature, flows downward in the outer pipe 17 and passes through the outlet 16 to the steam generator (not shown). ).
（発明が解決しようとする問題点）
上述のように構成した中間熱交換器において、−次系ナ
トリウムはスカート１２内を高速で上昇するため、第４
図に示すように、導入口１１より外胴１内に流入しても
大ぎな上昇成分を持ら、プレナム６内の液面１９を乱し
て渦を発生させ、カバーガス２０を微細な気泡としてナ
トリウム液面１９から主流に巻込む恐れがある。(Problems to be Solved by the Invention) In the intermediate heat exchanger configured as described above, the -order system sodium rises inside the skirt 12 at high speed, so the fourth
As shown in the figure, even if it flows into the outer shell 1 from the inlet 11, it has a large rising component, disturbs the liquid level 19 in the plenum 6, generates a vortex, and transforms the cover gas 20 into fine bubbles. As a result, there is a risk that sodium may be drawn into the mainstream from the sodium liquid level 19.
もし、−次系ナトリウム主流にガバーガス２０が巻込ま
れた場合には、循環ポンプ（図示せず）に導かれて炉心
（図示せず）へ送り込まれる。炉心へ送りこまれたカバ
ーガス２０はそこで加熱され、体積を増すことにより炉
心と一次系ナトリウムとの接触を妨げることになる。If the governor gas 20 is entrained in the primary sodium system, it is guided by a circulation pump (not shown) and sent into the reactor core (not shown). The cover gas 20 sent into the reactor core is heated there and increases in volume, thereby preventing contact between the reactor core and the primary sodium system.
この場合、アルゴンガス等からなるカバーガス２０はナ
トリウムに比較して熱伝達率が１／１０００以下と非常
に低いため、カバーガス２０が通過する部分において炉
心は十分に冷却されずに過熱状態となり、炉心が溶融し
て重大事故を起こす恐れがある。In this case, the cover gas 20 made of argon gas or the like has a very low heat transfer coefficient of 1/1000 or less compared to sodium, so the core is not sufficiently cooled in the area where the cover gas 20 passes and becomes overheated. , there is a risk that the reactor core will melt and cause a serious accident.
また、伝熱管１０上部の入口プレナム６内では一次系ナ
トリウムの液面１９の乱れや渦流により流動状態が不均
一となるため伝熱管１０内へ流れ込む一次系ナトリウム
の流配が不均一となり、熱交換効率が低下する上、伝熱
管１０相互の膨張差により伝熱管１０が損傷する恐れが
ある。In addition, in the inlet plenum 6 above the heat exchanger tube 10, the flow state becomes non-uniform due to turbulence and vortices in the liquid level 19 of the primary sodium, so the flow distribution of the primary sodium flowing into the heat transfer tube 10 becomes non-uniform, and the heat In addition to reducing the exchange efficiency, there is a risk that the heat exchanger tubes 10 may be damaged due to the difference in expansion between the heat exchanger tubes 10.
［発明の構成］
（問題点を解決するための手段）
本発明の中間熱交換器は背與技術にあける上述のごとき
欠点を除去すべくなされたもので、タンク型高速増殖炉
の主容器内に吊り下げられ、内側の下部に熱交換部を収
容し、上部に空間部を形成された外用と、この外胴の前
記空間部に形成され、一次冷却材を導入する導入口と、
前記外胴の前記空間部の外側に同心状に形成され下端か
ら前記一次冷却材を導入するスカートとを有する中間熱
交換器において、前記一次冷却材の導入口の外側に一次
冷却材の流れを周方向内側に変更きせる流路偏向板を設
けたことを特徴とするものである。[Structure of the Invention] (Means for Solving the Problems) The intermediate heat exchanger of the present invention has been made in order to eliminate the above-mentioned drawbacks in the background technology, and is designed to eliminate the above-mentioned drawbacks in the backing technology. an external body which is suspended from the body, houses a heat exchange part in the inner lower part, and has a space formed in the upper part; an inlet which is formed in the space of the outer body and introduces the primary coolant;
In an intermediate heat exchanger having a skirt formed concentrically outside the space of the outer shell and introducing the primary coolant from a lower end, the flow of the primary coolant is directed outside the inlet for the primary coolant. It is characterized by providing a flow path deflection plate that can be changed on the inside in the circumferential direction.
（作 用）
上述のように構成した本発明の中間熱交換器においては
、導入口の外側に流路偏向板が設けられているので、ス
カートから外用の入口プレナムへ流入する一次系冷却材
の上昇力は水平方向成分に変換され、入口プレナム内に
おける液面の波立ちやカバーガスの巻込みは防止される
。(Function) In the intermediate heat exchanger of the present invention configured as described above, the flow path deflecting plate is provided outside the inlet, so that the primary coolant flowing from the skirt to the external inlet plenum is The upward force is converted into a horizontal component, preventing ripples in the liquid level and entrainment of cover gas in the inlet plenum.
（実施例）
以下、第１図ないし第２図を参照して本発明の詳細な説
明する。なお、これらの図中、第３図または第４図にあ
けると同一部分には同じ符号を付し、重複を避けるため
、説明は省賂する。(Example) The present invention will be described in detail below with reference to FIGS. 1 and 2. In these figures, parts that are the same as those in FIG. 3 or 4 are given the same reference numerals, and explanations will be omitted to avoid duplication.
第１図および第２図は本発明の中間熱交換器の実施例の
要部を示すもので、この実施例では上部管板７の上方に
おいて導入口１′１の外側に周方向に渦巻片状に湾曲す
る複数の流路回向仮２１を設けである。この偏向板の湾
曲面は、円弧状または放物線状とされている。1 and 2 show the main parts of an embodiment of the intermediate heat exchanger of the present invention. In this embodiment, a spiral strip is formed in the circumferential direction on the outside of the inlet 1'1 above the upper tube plate 7. A plurality of flow path diversion sections 21 are provided which are curved in a shape. The curved surface of this deflection plate is arcuate or parabolic.
上述のように構成された本発明の中間熱交換器において
、スカート１２の下端から流入した一次系ナトリウムは
流路偏向板２１によって周方向内側へ偏向され、外胴１
の周囲を旋回しながら上昇する。In the intermediate heat exchanger of the present invention configured as described above, the primary sodium flowing from the lower end of the skirt 12 is deflected inward in the circumferential direction by the channel deflection plate 21, and
It ascends while circling around.
この旋回流によって導入口１１には流れによる動圧が直
接加わらないため静圧差によって導入口２１より周方向
に均一に径方向に流れ込む。従って、直接液面１９へ向
かう流れは抑制され、渦流の発生も防止でき、ナトリウ
ム液面１９からのカバーガス２０の巻込みを防止する。Due to this swirling flow, dynamic pressure due to the flow is not directly applied to the inlet 11, so that the fluid flows uniformly in the circumferential direction from the inlet 21 in the radial direction due to the static pressure difference. Therefore, the flow directly toward the liquid level 19 is suppressed, the generation of vortices can also be prevented, and the entrainment of the cover gas 20 from the sodium liquid level 19 is prevented.
また、−次系ナトリウムは導入口１１よりプレナム１６
内へ周方向に均一に流入するので伝熱管１０内への流麗
も均一化される。In addition, - order sodium is supplied to the plenum 16 from the inlet 11.
Since it flows uniformly into the heat exchanger tube 10 in the circumferential direction, the flow into the heat exchanger tube 10 is also made uniform.
［発明の効果］
以上説明したように本発明の中間熱交換器ではスカート
下端部近傍に少数の偏向板を設けたので、プレナム内の
液面を乱すことなく、渦流の発生も抑制でき、中間熱交
換器へのガス巻込みを防止し、炉心の溶融事故を未然に
防止できて炉心の健全性を確保でき、さらに伝熱管への
流麗も均一化されるので伝熱管相互の膨張差も緩和でき
伝熱管の健全性を確保できる。[Effects of the Invention] As explained above, in the intermediate heat exchanger of the present invention, since a small number of deflection plates are provided near the lower end of the skirt, generation of vortices can be suppressed without disturbing the liquid level in the plenum. It prevents gas from being entrained in the heat exchanger, prevents core meltdown accidents, and ensures the integrity of the core.Furthermore, the flow to the heat transfer tubes is evened out, which alleviates the difference in expansion between the heat transfer tubes. The integrity of the heat exchanger tubes can be ensured.
第１図は本発明の中間熱交換器の実施例の要部を示す断
面図、第２図は第１図の■−■線に沿う横断面図、第３
図は従来の中間熱交換器を示す縦断面図、第４図は従来
の中間熱交換器の一部を拡大して示す縦断面図である。
１・・・・・・・・・外 胴
２・・・・・・・・・フランジ
３・・・・・・・・・主容器
４・・・・・・・・・出口ノズル・
５・・・・・・・・・−次系ナトリウム６・・・・・・
・・・入口プレナム
７・・・・・・・・・上部管板
８・・・・・・・・・下部管板
９・・・・・・・・・伝熱管支持板
１０・・・・・・・・・伝熱管
１１・・・・・・・・・導入口
１２・・・・・・・・・スカート
１３・・・・・・・・・入 口
１４・・・・・・・・・空 間
１５・・・・・・・・・内側管
１６・・・・・・・・・出 口
１７・・・・・・・・・外側管
１８・・・・・・・・・熱遮蔽体
１９・・・・・・・・・ナトリウム液面２０・・・・・
・・・・カバーガス
２１・・・・・・・・・流路鍋向仮
代理人 弁理士 則 近 憲 １も
同 三俣弘文
第１図
第２図
第３図
箪４図FIG. 1 is a cross-sectional view showing the main parts of an embodiment of the intermediate heat exchanger of the present invention, FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG.
The figure is a vertical cross-sectional view showing a conventional intermediate heat exchanger, and FIG. 4 is a vertical cross-sectional view showing a part of the conventional intermediate heat exchanger in an enlarged manner. 1...Outer body 2...Flange 3...Main container 4...Exit nozzle 5.・・・・・・・・・−Sodium 6・・・・・・
... Inlet plenum 7 ... ... Upper tube sheet 8 ... ... Lower tube sheet 9 ... Heat exchanger tube support plate 10 ... ...Heat transfer tube 11...Inlet 12...Skirt 13...Inlet 14... ...Space 15...Inner pipe 16...Outlet 17...Outer pipe 18... Heat shield 19... Sodium liquid level 20...
・・・Cover Gas 21・・・・・・Provisional Agent for Flow Path Nabe Patent Attorney Noriyoshi Chika 1 is also the same Hirofumi Mitsumata Figure 1 Figure 2 Figure 3 Figure 4
Claims (2)
内側の下部に熱交換部を収容し、上部に空間部を形成さ
れた外胴と、この外胴の前記空間部に形成されて一次冷
却材を導入する導入口と、前記空間部の外側に同心状に
形成され、下端から前記一次冷却材を導入するスカート
とを有する中間熱交換器において、前記スカートと外胴
との間隙部に一次冷却材の流れを前記間隙部において周
方向内側に偏向させる流路偏向板を設けたことを特徴と
する中間熱交換器。(1) Suspended within the main vessel of a tank-type fast breeder reactor,
an outer shell that accommodates a heat exchanger in the lower part of the inner side and has a space formed in the upper part; an inlet formed in the space of the outer shell to introduce a primary coolant; and an inlet outside the space. In an intermediate heat exchanger having a skirt that is formed concentrically and introduces the primary coolant from the lower end, the flow of the primary coolant is deflected inward in the circumferential direction in the gap between the skirt and the outer shell. An intermediate heat exchanger characterized in that it is provided with a flow path deflection plate.
および半径方向に沿って円弧状または放物線状に湾曲し
、かつ外胴下端部近傍の外側に複数個固着されているこ
とを特徴とする特許請求の範囲第１項記載の中間熱交換
器。(2) A plurality of flow path deflection plates are curved in an arc or parabolic shape along the circumference and radial direction of the gap between the skirt and the outer shell, and are fixed to the outside near the lower end of the outer shell. An intermediate heat exchanger according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61163704A JPS6319595A (en) | 1986-07-14 | 1986-07-14 | Intermediate heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61163704A JPS6319595A (en) | 1986-07-14 | 1986-07-14 | Intermediate heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6319595A true JPS6319595A (en) | 1988-01-27 |
Family
ID=15779037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61163704A Pending JPS6319595A (en) | 1986-07-14 | 1986-07-14 | Intermediate heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6319595A (en) |
-
1986
- 1986-07-14 JP JP61163704A patent/JPS6319595A/en active Pending
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