JPH03235095A - Internal pump type nuclear reactor - Google Patents

Internal pump type nuclear reactor

Info

Publication number
JPH03235095A
JPH03235095A JP2029587A JP2958790A JPH03235095A JP H03235095 A JPH03235095 A JP H03235095A JP 2029587 A JP2029587 A JP 2029587A JP 2958790 A JP2958790 A JP 2958790A JP H03235095 A JPH03235095 A JP H03235095A
Authority
JP
Japan
Prior art keywords
pump
pumps
flow
discharge side
suction side
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
Application number
JP2029587A
Other languages
Japanese (ja)
Inventor
Masato Koshiishi
正人 越石
Kanehiro Ochiai
落合　兼寛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2029587A priority Critical patent/JPH03235095A/en
Publication of JPH03235095A publication Critical patent/JPH03235095A/en
Pending legal-status Critical Current

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

  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE:To prevent uneven flow by mutual interfere and to intend improvement of operational conditions of a pump and flowing conditions by providing a partition plate between adjacent pumps of a suction side and a discharge side of an internal pump. CONSTITUTION:Partition plates 3 and 7 are placed at each the center position among adjacent pumps 4 at a suction side and a discharge side flow paths which are at an upstream side of a pump deck 8, in a way that the plates may contact to the deck 8, a shroud wall 2 and a vessel wall 1. such partition plates 3 and 7 are placed all the such positions among the adjacent pumps 4. Upper ends of the partition plates 3 and 7 occupy positions of which distance from the deck 8 is three times of a diffuser diameter, and, when one of the pumps stops its operation, the position is at an upper-stream side than a position where a reverse flow from the discharge side to a suction side of the stopped pump, reaches, and therefore a normal flow of operating pumps and the reverse flow from the stopped pump do not interfere mutually even when the pumps trip partially. Accordingly, generation of cavitation and the like are well prevented, flowing conditions are improved and also reliability of the pumps is much improved.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、インターナルポンプ型原子炉に係り、特に、
インターナルポンプの吸込側、及び、吐出側の流動状態
を整流化する装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an internal pump type nuclear reactor, and in particular,
The present invention relates to a device for rectifying the flow state on the suction side and the discharge side of an internal pump.

〔従来の技術〕[Conventional technology]

インターナルポンプ型原子炉の炉内流動整流装置に関す
る従来の発明は、特開昭６０−１０７５９６号公報に記
載の様に、インターナルポンプ吸込側流路に、仕切り板
を設けるものであった。第４図に、その構成を示す。隣
接するポンプ間の、吸込側流路に、シュラウド壁とベッ
セル壁を閉止する形で仕切り板が設けられている。ポン
プ吸込側の流れは、前述の仕切り板に沿って、ポンプに
流入することとなり、隣接するポンプからの流れの干渉
を受けない様になっている。従って、吸込側の流れが整
流されたものとなるため、吸込渦等の流れの乱れ、キャ
ビテーションの発生等を防止することができ、ポンプの
信頼性向上を図ることができる。A conventional invention relating to an in-core flow straightening device for an internal pump type nuclear reactor, as described in Japanese Patent Application Laid-open No. 107596/1983, has provided a partition plate in the internal pump suction side flow path. FIG. 4 shows its configuration. A partition plate is provided in the suction side flow path between adjacent pumps so as to close off the shroud wall and the vessel wall. The flow on the pump suction side flows into the pump along the above-mentioned partition plate, so that there is no flow interference from adjacent pumps. Therefore, since the flow on the suction side is rectified, disturbances in the flow such as suction vortices, occurrence of cavitation, etc. can be prevented, and the reliability of the pump can be improved.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上記従来技術は、ポンプ吸込側流路における整流方法に
ついて検討したものであり、吐出側流路の整流について
は、考慮されていなかった。吐出側流路は、ポンプより
旋回成分を持った流れが吐出され、隣接ポンプ間で流れ
が干渉し、不均一流れを生じる可能性がある。また、ポ
ンプ吐出側には、シュラウド壁をサポートするレグが設
けられているため、吐出流の抵抗となっていた。The above-mentioned conventional technology examines the method of rectifying the flow in the pump suction side flow path, but does not consider the rectification of the discharge side flow path. In the discharge side flow path, a flow having a swirling component is discharged from the pump, and there is a possibility that the flows may interfere with each other between adjacent pumps, resulting in non-uniform flow. Furthermore, a leg that supports the shroud wall is provided on the pump discharge side, which acts as a resistance to the discharge flow.

本発明の目的は、インターナルポンプの吸込側及び吐出
側の両流路において、ポンプ間の相互干渉による不均一
流れの発生を防止し、ポンプの運転条件の向上を図り、
ポンプ吐出流の抵抗となる炉内構造物を必要としない原
子炉構造を提供することにある。The purpose of the present invention is to prevent the occurrence of uneven flow due to mutual interference between pumps in both the suction side and discharge side flow paths of an internal pump, and to improve the operating conditions of the pump.
An object of the present invention is to provide a nuclear reactor structure that does not require reactor internals that act as resistance to pump discharge flow.

〔課題を解決するための手段〕[Means to solve the problem]

上記目的を達成するために、本発明では、インターナル
ポンプの吸込側流路及び吐出側流路の、隣接するポンプ
の間に、ベッセル壁とシュラウド壁の間を閉止するよう
、仕切り板を設け、炉内の流れを整流できる様にしたも
のである。In order to achieve the above object, in the present invention, a partition plate is provided between adjacent pumps in the suction side flow path and the discharge side flow path of the internal pump so as to close the space between the vessel wall and the shroud wall. , the flow inside the furnace can be rectified.

また、本発明により、整流のための仕切り板を用いて、
シュラウド壁を支持する構造とすることができ、従来の
シュラウドサポートレグを不要とする効果がある。Further, according to the present invention, using a partition plate for rectifying the flow,
This structure can support the shroud wall, and has the effect of eliminating the need for conventional shroud support legs.

〔作用〕[Effect]

吸込側の仕切り板は、隣接するポンプの間を仕切る形で
設けられており、各々のポンプに対する流れが、この整
流板にさえぎられて、干渉しない様になっている。一部
のポンプが停止した場合には、停止ポンプの吐出側から
吸込側へ逆流が生じるが、逆流が到達する距離までは、
仕切り板が設けられているため、運転ポンプに対する順
流と干渉し合うことはない。The partition plate on the suction side is provided to partition adjacent pumps, and the flow to each pump is blocked by this rectifier plate to prevent interference. When some pumps stop, backflow occurs from the discharge side of the stopped pump to the suction side, but up to the distance that the backflow reaches,
Since a partition plate is provided, there is no interference with the forward flow to the operating pump.

吐出側の仕切り板も、吸込側と同様に、隣接するポンプ
の間を仕切る形で設けられており、各ポンプから吐出さ
れた旋回成分をもつ流れは、この仕切り板にさえぎられ
るため、互いに衝突、干渉することはない。従って、吐
出側流路におけるポンプ間の干渉を防止し、シュラウド
内側への流れを均一なものとすることが可能である。Similar to the suction side, the partition plate on the discharge side is also provided to partition adjacent pumps, and the flow with a swirling component discharged from each pump is blocked by this partition plate, so it does not collide with each other. , will not interfere. Therefore, it is possible to prevent interference between the pumps in the discharge side flow path and to make the flow inside the shroud uniform.

また、吸込側及び吐出側に設置された仕切り板によりシ
ュラウド壁を支持する構造となっているため、仕切り板
の設置による炉内構造の複雑化を防ぎ、ポンプ吐出流の
抵抗となる構造物の設置を不要としている。In addition, the shroud wall is supported by partition plates installed on the suction and discharge sides, which prevents the structure inside the furnace from becoming complicated due to the installation of partition plates, and prevents structures that act as resistance to the pump discharge flow. No installation required.

〔実施例〕〔Example〕

以下、本発明の一実施例を第１図ないし第３図により説
明する。An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

第１図は、インターナルポンプ吸込側及び吐出側の隣接
するポンプ間に仕切り板を設けた炉内流動整流装置の構
成を示す。ポンプデツキ８より上流側の吸込側及び吐出
側流路には、隣接するポンプ４の相互間の中央に、ポン
プデツキ８．シュラウド壁２．ベッセル壁１に接するよ
う、仕切り板３．７が設置されている。仕切り板３，７
は、隣接するポンプの間には、すべて設けられている。FIG. 1 shows the configuration of an in-furnace flow rectifier in which a partition plate is provided between adjacent pumps on the suction side and the discharge side of the internal pump. In the suction side and discharge side flow paths upstream from the pump deck 8, a pump deck 8. Shroud wall 2. A partition plate 3.7 is installed so as to be in contact with the vessel wall 1. Partition plates 3, 7
are all located between adjacent pumps.

仕切り板の上端は、ポンプデツキ力）ら、デイフユーザ
径の二倍の位置であり、これは、ポンプ−台停止時に、
吐出側から停止ポンプの吸込側への逆流が到達する位置
よりも上流側となっている。The upper end of the partition plate is at a position twice the diameter of the diffuser (pump deck force), which means that when the pump is stopped,
It is located upstream of the position where the reverse flow from the discharge side to the suction side of the stop pump reaches.

従って、部分ポンプトリップ時にも、運転中ポンプへの
順流と停止ポンプからの逆流が干渉し合うことはない。Therefore, even during a partial pump trip, the forward flow to the operating pump and the reverse flow from the stopped pump do not interfere with each other.

また、シュラウド壁は仕切り板３゜７により支持されて
おり、従来のサポートレグは不要となっている。Furthermore, the shroud wall is supported by the partition plate 3.7, eliminating the need for conventional support legs.

第２図は、インターナルポンプ吐出側の、隣接するポン
プに仕切り板を設けた炉内流動整流装置の構成を示す。FIG. 2 shows the configuration of an in-furnace flow rectifier in which partition plates are provided between adjacent pumps on the discharge side of the internal pump.

仕切り板７は、隣接するポンプ４の間すべてに、ポンプ
デツキ８．シュラウド壁２゜ベッセル壁１に接する形で
設けられている。シュラウド壁の荷重は、この仕切り板
により支持されるため、従来のシュラウドサポートレグ
は不要となっている。The partition plate 7 is provided between all the adjacent pumps 4 and between the pump decks 8. The shroud wall 2° is provided in contact with the vessel wall 1. The load on the shroud wall is supported by this partition plate, eliminating the need for conventional shroud support legs.

第３図は、インターナルポンプの吸込側及び吐出側に、
仕切り板を設置した炉内流動整流装置の構成を示す。隣
接するポンプ４間のすべてに、仕切り板３，７が設けら
れている。シュラウド壁２はサポートレグ５により支持
されている。Figure 3 shows the suction and discharge sides of the internal pump.
This figure shows the configuration of an in-furnace flow rectifier equipped with partition plates. Partition plates 3 and 7 are provided between all adjacent pumps 4. The shroud wall 2 is supported by support legs 5.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、インターナルポンプ型の原子炉のポン
プの吸込側及び吐出側において相互干渉により不均一流
れが生じることを防止することが可能で、吸込側の流れ
が整流されることによるポンプの運転条件の向上、吐出
側の流れが整流されることによる炉内構造物に対する流
動状態の改善を図ることができる。すなわち、吸込側で
は、ポンプ性能に影響を与える旋回流等の不均一流れを
抑制することにより、工場試験により検証したポンプ性
能を、実機で確実に達成することができる。According to the present invention, it is possible to prevent uneven flow from occurring due to mutual interference on the suction side and discharge side of the pump of an internal pump type nuclear reactor, and the flow on the suction side is rectified. It is possible to improve the operating conditions of the reactor, and to improve the flow condition for the reactor internals by rectifying the flow on the discharge side. That is, on the suction side, by suppressing non-uniform flow such as swirling flow that affects pump performance, the pump performance verified by factory tests can be reliably achieved in the actual machine.

吐出側では、旋回成分を持ったポンプ吐出流同士の衝突
を回避し、局所的な静圧上昇、非−横流れの発生等を防
ぐことができ、炉内構造物に対し、過度の流体力がかか
ることを低減できる。On the discharge side, it is possible to avoid collisions between pump discharge flows with swirling components, prevent local increases in static pressure and the occurrence of non-lateral flows, and prevent excessive fluid force from acting on the reactor internal structures. This can be reduced.

また、ポンプ間の相互干渉を防止する仕切り板は、シュ
ラウド壁を支持する構造となっているため、ポンプ吐出
流の抵抗となる構造物がなく、炉内圧損の低減を図るこ
とができる。Further, since the partition plate that prevents mutual interference between the pumps has a structure that supports the shroud wall, there is no structure that acts as a resistance to the pump discharge flow, and it is possible to reduce the pressure loss in the furnace.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は、本発明の一実施例のインターナルポンプ型原
子炉のポンプ吸込側に整流板を設けた場合の断面図（ａ
）および斜視図（ｂ）、第２図は、吐出側に整流板を設
けた場合の本発明の断面図（ａ）および斜視図（ｂ）、
第３図は、吸込側及び吐出側の両方に整流板を設けた場
合の本発明の断面図（ａ）および斜視図（ｂ）、第４図
は従来の原子炉圧力容器下部の部分斜視図である。 １・・・ベッセル壁、２・・・シュラウド壁、３・・・
仕切り板、４・・・インターナルポンプ、５・・・シュ
ラウドサ第 ２ 画 （幻 第 刀 ＜ａ） （ＱFIG. 1 is a cross-sectional view (a
) and a perspective view (b), FIG. 2 is a sectional view (a) and a perspective view (b) of the present invention when a current plate is provided on the discharge side,
FIG. 3 is a cross-sectional view (a) and a perspective view (b) of the present invention when a current plate is provided on both the suction side and the discharge side, and FIG. 4 is a partial perspective view of the lower part of the conventional reactor pressure vessel. It is. 1...vessel wall, 2...shroud wall, 3...
Partition plate, 4... Internal pump, 5... Shroud sa 2nd picture (phantom sword <a) (Q

Claims (1)

【特許請求の範囲】 １、原子炉圧力容器内に冷却材再循環ポンプを内蔵した
インターナルポンプ型原子炉において、ポンプの吸込側
流路及び吐出側流路の、隣接する前記ポンプ間に、前記
ポンプ同士の流れの干渉を抑制するように仕切り板を設
けたことを特徴とするインターナルポンプ型原子炉。 ２、原子炉圧力容器内に冷却材再循環ポンプを内蔵した
インターナルポンプ型原子炉において、ポンプの吸込側
流路及び吐出側流路の隣接する前記ポンプ間に設けた仕
切り板により、シユラウド壁を支持する構造としたこと
を特徴とするインターナルポンプ型原子炉。３、原子炉
圧力容器内に冷却材再循環ポンプを内蔵したインターナ
ルポンプ型原子炉において、ポンプの吐出側流路の、隣
接する前記ポンプの間に設けた仕切り板により、シユラ
ウド壁を支持する構造としたことを特徴とするインター
ナルポンプ型原子炉。[Claims] 1. In an internal pump type nuclear reactor having a coolant recirculation pump built into the reactor pressure vessel, between the adjacent pumps in the suction side flow path and the discharge side flow path of the pump, An internal pump type nuclear reactor, characterized in that a partition plate is provided to suppress flow interference between the pumps. 2. In an internal pump reactor with a coolant recirculation pump built into the reactor pressure vessel, the shroud wall is An internal pump type nuclear reactor characterized by having a structure that supports. 3. In an internal pump reactor with a coolant recirculation pump built into the reactor pressure vessel, the shroud wall is supported by a partition plate provided between adjacent pumps in the discharge side flow path of the pump. An internal pump type nuclear reactor characterized by its structure.
JP2029587A 1990-02-13 1990-02-13 Internal pump type nuclear reactor Pending JPH03235095A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2029587A JPH03235095A (en) 1990-02-13 1990-02-13 Internal pump type nuclear reactor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2029587A JPH03235095A (en) 1990-02-13 1990-02-13 Internal pump type nuclear reactor

Publications (1)

Publication Number Publication Date
JPH03235095A true JPH03235095A (en) 1991-10-21

Family

ID=12280209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2029587A Pending JPH03235095A (en) 1990-02-13 1990-02-13 Internal pump type nuclear reactor

Country Status (1)

Country Link
JP (1) JPH03235095A (en)

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