JPH0862371A - Upper end plate type reactor vessel - Google Patents
Upper end plate type reactor vesselInfo
- Publication number
- JPH0862371A JPH0862371A JP6221135A JP22113594A JPH0862371A JP H0862371 A JPH0862371 A JP H0862371A JP 6221135 A JP6221135 A JP 6221135A JP 22113594 A JP22113594 A JP 22113594A JP H0862371 A JPH0862371 A JP H0862371A
- Authority
- JP
- Japan
- Prior art keywords
- reactor vessel
- reactor
- mirror lid
- lid
- opening
- 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
-
- 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
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、互いに分離した炉容器
本体と上鏡蓋型上部構造との組み合わせからなる原子炉
容器に関し、更に詳しく述べると、上鏡蓋型上部構造
が、アーチ型構造で中央に開口を備え該開口の内周にフ
ランジ部を有する上鏡蓋と、その下方に設けた熱遮蔽体
とからなり、引き抜き型炉心上部機構を前記上鏡蓋のフ
ランジ部で支持する上鏡蓋型原子炉容器に関するもので
ある。この原子炉容器は、例えば液体ナトリウム冷却高
速炉などに適用できる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reactor vessel comprising a combination of a reactor vessel body and an upper mirror lid type upper structure which are separated from each other. More specifically, the upper mirror lid type upper structure is an arch type structure. And an upper mirror lid having an opening in the center and a flange portion on the inner circumference of the opening, and a heat shield provided below the upper mirror lid to support the pull-out type core upper mechanism on the flange portion of the upper mirror lid. The present invention relates to a mirror lid type reactor vessel. This reactor vessel can be applied to, for example, a liquid sodium cooled fast reactor.
【０００２】[0002]
【従来の技術】現在の原子炉容器は、有底円筒状の炉容
器本体の上部に遮蔽プラグを設置する構成になってい
る。この遮蔽プラグは、固定プラグと回転プラグとの組
み合わせからなり、該回転プラグを炉心上部機構が貫通
している。炉容器本体内の冷却材液面と遮蔽プラグとの
間はカバーガス（通常、アルゴンガス）が充填されたカ
バーガス空間になっている。2. Description of the Related Art A current reactor vessel has a structure in which a shield plug is installed on an upper portion of a bottomed cylindrical reactor vessel body. The shield plug is composed of a combination of a fixed plug and a rotary plug, and an upper core mechanism penetrates the rotary plug. There is a cover gas space filled with a cover gas (usually argon gas) between the coolant liquid level and the shield plug in the furnace container body.
【０００３】ここで遮蔽プラグは、放射線遮蔽と断熱の
両方、及びカバーガスバウンダリの機能を果たす。その
ために、内部に重コンクリートを充填した放射線遮蔽層
を形成する他、下部には窒素ガス等による冷却を可能と
するようにガス流路を設けている。このような遮蔽プラ
グは、その総重量が数百トンから場合により千トンを超
えるので、剛性を高めるために多重の溶接箱型構造（マ
ルチボックス構造）となっている。即ち、複数の水平の
平板の間に多数の縦方向補強材を放射状、円周状に設
け、平板と補強材によって多数の箱型構造（セル構造）
を作っている。The shield plug here serves both as a radiation shield and a heat insulator and as a cover gas boundary. Therefore, in addition to forming a radiation shielding layer filled with heavy concrete, a gas flow path is provided in the lower part so that cooling with nitrogen gas or the like is possible. Since such a shielding plug has a total weight of several hundreds of tons to over 1,000 tons in some cases, it has a multiple welding box structure (multi-box structure) in order to enhance rigidity. That is, a large number of vertical reinforcing members are radially and circumferentially provided between a plurality of horizontal flat plates, and a large number of box-shaped structures (cell structure) are formed by the flat plates and the reinforcing members.
Is making.
【０００４】そのため溶接工数や物量が非常に多い。ま
た、遮蔽プラグ上面を低温にするため箱型構造内で熱遮
蔽、冷却が行われるが、上部流出入配管方式の場合、高
温主配管が通過する箱型構造セルは雰囲気温度が上昇
し、箱型構造セル間で温度むらが生じやすい。このた
め、遮蔽プラグと上部流出入配管の場合は、窒素ガスな
どによる強制冷却設備を用いて、配管貫通部近傍の箱型
セルが他の部分の箱型セルと大きな差異が生じないよう
に積極的で精緻な冷却を行い、均一温度を達成する必要
がある。Therefore, the number of welding steps and the amount of material are very large. Also, in order to keep the upper surface of the shielding plug at a low temperature, heat is shielded and cooled in the box structure, but in the case of the upper inflow and outflow piping system, the ambient temperature rises in the box structure cell through which the high temperature main piping passes, and Temperature unevenness easily occurs between mold structure cells. For this reason, in the case of the shielding plug and the upper inflow and outflow piping, use a forced cooling facility such as nitrogen gas and make sure that the box-shaped cell near the pipe penetration does not significantly differ from the box-shaped cells in other parts. It is necessary to perform uniform and precise cooling to achieve a uniform temperature.
【０００５】このような箱型遮蔽プラグのもつ問題を解
決できる技術として、上部鏡板方式高速炉が提案されて
いる（特開平６−２７２８０号公報）。これは、原子炉
容器の上部を上部鏡板で覆ってカバガスバウンダリを形
成し、原子炉容器内のカバーガス空間に断熱構造を含む
上部構造を設け、上部鏡板の外部上方に放射線遮蔽体を
配置し、該放射線遮蔽体と上部鏡板と上部構造を貫通し
て炉心上部機構を設置する構成である。An upper end plate type fast reactor has been proposed as a technique capable of solving the problem of such a box-shaped shielding plug (Japanese Patent Laid-Open No. 6-27280). This is to cover the upper part of the reactor vessel with an upper mirror plate to form a cover gas boundary, provide an upper structure including a heat insulating structure in the cover gas space inside the reactor container, and arrange a radiation shield above the upper mirror plate. Then, the core upper mechanism is installed by penetrating the radiation shield, the upper end plate and the upper structure.
【０００６】[0006]
【発明が解決しようとする課題】ここで提案されている
上部鏡板方式高速炉は、上部鏡板の周囲を原子炉容器に
フランジ接続するか、あるいは直接溶接する構造である
ので、原子炉容器の様々な様式には適合し難い。また引
き抜き型炉心上部機構を取り付ける場合、原子炉容器の
上方に位置する放射線遮蔽体で支持することになるが、
その支持部分は水平面度の高い寸法精度が要求されるた
め製作性が低く、且つ原子炉容器全体のコンパクト化に
は不十分となる。更に、冷却材の流入出管の配置につい
ては特に規定されておらず、原子炉容器の様々な様式に
対応できるようにするために、工夫・改善の余地があ
る。The upper end plate type fast reactor proposed here has a structure in which the periphery of the upper end plate is flange-connected to the reactor vessel or is welded directly to the reactor vessel. It is difficult to adapt to various styles. In addition, when attaching the pull-out type upper core mechanism, it will be supported by the radiation shield located above the reactor vessel,
Since the supporting part requires high dimensional accuracy with high horizontal flatness, the manufacturability is low, and it is insufficient for downsizing the entire reactor vessel. Further, the arrangement of the inflow and outflow pipes for the coolant is not specified in particular, and there is room for improvement and improvement so as to be compatible with various types of reactor vessels.
【０００７】本発明の目的は、原子炉容器をコンパクト
化する炉心上部機構引き抜き方式に適合し、また原子炉
容器の多様な様式に適合しやすくし、製作性、経済性、
並びに構造健全性の向上を図ることができ、設計が容易
となるような上鏡蓋型原子炉容器を提供することであ
る。An object of the present invention is to adapt to an upper core mechanism withdrawing method for compacting a reactor vessel, to facilitate adapting to various modes of the reactor vessel, manufacturability, economical efficiency,
Another object of the present invention is to provide a top-cover-type reactor vessel which can improve the structural soundness and can be easily designed.
【０００８】[0008]
【課題を解決するための手段】本発明は、高速炉用の炉
容器本体と、その上部を覆うように位置してカバーガス
バウンダリを形成し、前記炉容器本体とは分離して別々
に支持される上鏡蓋型上部構造との組み合わせからなる
上鏡蓋型原子炉容器である。ここで上鏡蓋上部構造は、
アーチ型構造で中央に開口を備え該開口の内周にフラン
ジ部を有する上鏡蓋と、該上鏡蓋の下方に設けた熱遮蔽
体とからなる。引き抜き型炉心上部機構は前記上鏡蓋の
フランジ部で支持する。SUMMARY OF THE INVENTION According to the present invention, a furnace container body for a fast reactor and a cover gas boundary formed so as to cover the upper portion thereof are formed and are separately supported from the furnace container body. An upper-view-cover-type nuclear reactor vessel is formed by combining the upper-view-cover-type upper structure described above. Here, the upper structure of the upper mirror lid is
The upper mirror cover has an arch-shaped structure and has an opening at the center and a flange portion on the inner periphery of the opening, and a heat shield provided below the upper mirror cover. The pull-out type upper core mechanism is supported by the flange portion of the upper mirror lid.
【０００９】上鏡蓋のフランジ部は、例えば上鏡蓋の中
央開口から下方に垂設した円筒部の下端内周側に設け
る。放射線遮蔽は、上鏡蓋の上方に位置し該上鏡蓋とほ
ぼ同径の開口を有する床コンクリートと、前記フランジ
部上から床コンクリート上面に達するように設けた外周
側固定式と内周側可動式の二重の追加遮蔽で行う。上部
流出入配管は、炉容器本体の上部開口を通ってからほぼ
直角に曲がり上鏡蓋を貫通して設けられ、該貫通部にベ
ローズを設けて配管熱膨張変位を吸収するように構成す
る。The flange portion of the upper mirror lid is provided, for example, on the inner peripheral side of the lower end of the cylindrical portion that extends downward from the central opening of the upper mirror lid. The radiation shield is a floor concrete located above the upper mirror lid and having an opening of substantially the same diameter as the upper mirror lid, and an outer peripheral side fixed type and an inner peripheral side provided so as to reach the upper surface of the floor concrete from above the flange portion. This is done with a movable double shield. The upper inflow / outflow pipe is provided at a substantially right angle after passing through the upper opening of the furnace vessel main body and penetrating the upper mirror lid, and a bellows is provided at the penetrating portion to absorb the thermal expansion displacement of the pipe.
【００１０】[0010]
【作用】炉容器本体と上鏡蓋型上部構造とを分離して設
置する形式は、原子炉容器の多様な様式に適合する。ア
ーチ型の上鏡蓋は載荷能力が高く、引き抜き型の上部炉
心構造の重量を受け止める。また上鏡蓋型上部構造で
は、下方の熱遮蔽体と上方での外側冷却とによる単純な
設計で温度の均一化が達成され、上部構造内で局所的な
高温配管が流出入する方式（上部流出入配管）に適合す
る。The type in which the reactor vessel main body and the upper mirror lid type upper structure are separately installed is suitable for various types of reactor vessels. The arch-shaped upper mirror lid has a high loading capacity and receives the weight of the pull-out type upper core structure. In addition, the upper mirror lid type upper structure achieves uniform temperature with a simple design by the lower heat shield and the outer cooling on the upper side. Inflow and outflow piping).
【００１１】[0011]
【実施例】図１は本発明に係る上鏡蓋型原子炉容器の一
実施例を示す全体構成図である。この原子炉容器は、液
体ナトリウム冷却高速炉用の炉容器本体１０と、その上
部を覆うように位置してカバーガスバウンダリを形成
し、前記炉容器本体１０とは分離して別々に支持される
上鏡蓋型上部構造３０との組み合わせからなる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram showing an embodiment of a top-cover-type reactor vessel according to the present invention. This reactor vessel is a reactor vessel body 10 for a liquid sodium cooled fast reactor, and a cover gas boundary is formed so as to cover the upper portion of the reactor vessel body 10 and is separately supported from the reactor vessel body 10. In combination with the upper mirror lid type upper structure 30.
【００１２】炉容器本体１０は、図２に明瞭に示されて
いるように、上部開放の有底円筒容器であり、原子炉建
屋側のペデスタル（支持用の台座）１２においてフラン
ジ部１４にて支持される。具体的には、該ペデスタル１
２上に水平面度を有する鋼製板（ソールプレート）を設
置し、その上に前記フランジ部１４の下面が接するよう
にして炉容器本体１０を据え付ける。炉容器本体１０の
外側はガードベッセル１６で覆われている。なおガード
ベッセル１６は、上部のフランジ部で原子炉建屋によっ
て支持されている。As clearly shown in FIG. 2, the reactor vessel body 10 is a bottomed cylindrical vessel having an open top, and a flange portion 14 at a pedestal (supporting pedestal) 12 on the reactor building side. Supported. Specifically, the pedestal 1
A steel plate (sole plate) having horizontal flatness is installed on the upper surface of the furnace 2, and the furnace vessel body 10 is installed so that the lower surface of the flange portion 14 is in contact therewith. The outside of the furnace container body 10 is covered with a guard vessel 16. The guard vessel 16 is supported by the reactor building at the upper flange portion.
【００１３】この炉容器本体１０の内部中央には炉心２
０が設置されており、該炉心２０で発生した熱はコール
ドレグ配管２２から流入する冷却材ナトリウムで除熱さ
れ、高温となった冷却材ナトリウムはホットレグ配管２
４から流出する。これらのナトリウム流出入配管は、炉
容器本体１０の側面を貫通するのではなく、上部開口を
通って外部に引き出される方式である。炉心２０の上方
には炉心上部機構２６が位置しており、この炉心上部機
構２６は引き抜き方式である。炉容器本体１０内のナト
リウム液面より上方の空間はカバーガス（通常、アルゴ
ンガス）空間２８となっている。A core 2 is provided at the center of the inside of the furnace container body 10.
No. 0 is installed, the heat generated in the core 20 is removed by the coolant sodium flowing in from the cold leg pipe 22, and the coolant sodium having a high temperature is hot leg pipe 2
It flows out from 4. These sodium inflow and outflow pipes do not penetrate the side surface of the furnace vessel body 10 but are drawn out through the upper opening to the outside. An upper core mechanism 26 is located above the core 20, and the upper core mechanism 26 is of a pull-out type. The space above the liquid surface of sodium in the furnace container body 10 is a cover gas (usually argon gas) space 28.
【００１４】さて、このような炉容器本体１０の上部を
覆う上鏡蓋型上部構造３０は、上鏡蓋３２と、その下方
に設けた熱遮蔽体３４とからなる。上鏡蓋３２は、図２
に明瞭に示されているように、全体がアーチ型構造で中
央に開口３６を備え、該開口３６から下方に垂設した円
筒部３８と、該円筒部３８の下端内周側に設けたフラン
ジ部４０を有する。また熱遮蔽体３４は、図３に示すよ
うに、多数のステンレス鋼板４２をスペーサ４４を介し
て一定間隔で積層し、支柱４６で保持した構成であっ
て、炉心で発生した熱が上鏡蓋３２を通して外部に放散
することを防止するために設けた断熱積層構造体であ
る。通常、上鏡蓋３２の上方からガス冷却するため、カ
バーガス空間２８は上部の温度が低く、下部の温度が高
くなるので、カバーガスが自然対流する恐れがある。図
３に示す積層構造の熱遮蔽体３４は、このような自然対
流を遮断する働きもしている。The upper mirror lid type upper structure 30 for covering the upper portion of the furnace container body 10 is composed of an upper mirror lid 32 and a heat shield 34 provided below the upper mirror lid 32. The upper mirror lid 32 is shown in FIG.
As clearly shown in FIG. 2, a cylindrical portion 38 is provided with an opening 36 in the center with an arcuate structure as a whole, and a cylindrical portion 38 hangs downward from the opening 36, and a flange provided on the inner peripheral side of the lower end of the cylindrical portion 38. It has a section 40. Further, as shown in FIG. 3, the heat shield 34 has a structure in which a large number of stainless steel plates 42 are stacked at regular intervals via spacers 44 and held by columns 46. The heat insulating laminated structure is provided to prevent the heat from being diffused to the outside through 32. Usually, since the gas is cooled from above the upper mirror lid 32, the cover gas space 28 has a lower temperature in the upper portion and a higher temperature in the lower portion, so that the cover gas may spontaneously convect. The laminated heat shield 34 shown in FIG. 3 also functions to block such natural convection.
【００１５】前記のように、上鏡蓋型上部構造３０は、
炉容器本体１０の上部を覆うように据え付ける。その詳
細を図４に示す。上鏡蓋３２の外周に形成されている据
付部４８を、原子炉建屋側のペデスタル１２上（前述の
ように、実際には水平面度を有する鋼板板上）に設置す
る。図面から明らかなように、この上鏡蓋３２は炉容器
本体１０とは完全に分離した状態であり、同じペデスタ
ル１２上ではあるが、上鏡蓋据付部４８が炉容器本体の
フランジ部１４の外周側に位置するような関係にある。
そして、両者の間にはＵシール５０を設けて、カバーガ
スバウンダリを形成している。As described above, the upper mirror lid type upper structure 30 is
It is installed so as to cover the upper part of the furnace container body 10. The details are shown in FIG. The installation portion 48 formed on the outer periphery of the upper mirror lid 32 is installed on the pedestal 12 on the reactor building side (actually, on a steel plate having horizontal flatness as described above). As is apparent from the drawing, the upper mirror lid 32 is completely separated from the furnace vessel body 10 and is on the same pedestal 12, but the upper mirror lid installation portion 48 is located on the flange portion 14 of the furnace vessel body. The relationship is such that it is located on the outer peripheral side.
A U seal 50 is provided between the two to form a cover gas boundary.
【００１６】本発明では、引き抜き型炉心上部機構２６
は、上鏡蓋３２の中央開口に設けられているフランジ部
４０上に搭載し、アーチ型の上鏡蓋３２によって支持す
る。その部分のシールは二重のＯリング５２により行
う。In the present invention, the pull-out type core upper mechanism 26
Is mounted on the flange portion 40 provided in the central opening of the upper mirror lid 32, and is supported by the arch-shaped upper mirror lid 32. A double O-ring 52 is used to seal that portion.
【００１７】上部ナトリウム流出入配管（ホットレグ配
管２２及びコールドレグ配管２４）は、炉容器本体１０
から真っ直ぐ上方に立ち上がり上部開口を通って、熱遮
蔽体３４の内部でほぼ直角方向に曲がるように設けら
れ、上鏡蓋３２を貫通する。そこで、貫通部５４にベロ
ーズ５６を設けてカバーガスバウンダリを形成すると共
に、該ベローズ５６によって配管の熱膨張変位を吸収す
る。The upper sodium inflow and outflow pipes (hot leg pipe 22 and cold leg pipe 24) are connected to the furnace container body 10.
It is provided so as to rise straight up from above through the upper opening so as to be bent at a substantially right angle inside the heat shield 34, and penetrates the upper mirror lid 32. Therefore, a bellows 56 is provided in the penetrating portion 54 to form a cover gas boundary, and the bellows 56 absorb the thermal expansion displacement of the pipe.
【００１８】この実施例では、遮蔽機能は、上鏡蓋３２
の上部に設けられている床コンクリート６０、及び上鏡
蓋３２の中央開口周りに配置した二重の追加遮蔽６２，
６４が行う。外周側の追加遮蔽６２は、固定遮蔽であ
り、鉛のキャン構造である。内周側の追加遮蔽６４は、
燃料交換時に取り外し可能な可動構造とし、材料は鋼材
からなる。これら二重の追加遮蔽６２，６４は、主とし
てナトリウム−２４のγ線を遮蔽し、炉心上部機構２６
の上面での線量当量率を所定の値まで下げる機能を果た
している。In this embodiment, the shielding function is the upper mirror lid 32.
Floor concrete 60 provided on the upper part of the, and double additional shields 62 arranged around the central opening of the upper mirror lid 32,
64 does. The additional shield 62 on the outer peripheral side is a fixed shield and has a lead can structure. The additional shield 64 on the inner peripheral side is
It has a movable structure that can be removed when refueling, and is made of steel. These double additional shields 62 and 64 mainly shield gamma rays of sodium-24, and
It has the function of lowering the dose equivalent rate on the upper surface of the to a predetermined value.
【００１９】なおリングガーダー６６は、内部にコンク
リートを有する鋼製枠からなる床コンクリート６０を支
持し、その荷重を建屋側に伝達するもので、リング形状
をしている鋼製構造材である。なおリングガーダー６６
の内部に充填されているコンクリートは放射線遮蔽の機
能も果たす。スナッバー６８は、地震振動に対して配管
を固定支持する防振器である。The ring girder 66 supports the floor concrete 60 made of a steel frame having concrete inside and transmits the load to the building side, and is a ring-shaped steel structural material. Ring girder 66
The concrete filled in the inside also functions as a radiation shield. The snubber 68 is a vibration isolator that fixedly supports the pipe against earthquake vibration.
【００２０】[0020]
【発明の効果】本発明は上記のような構成としたことに
より、次のような効果が生じる。 炉心上部機構の重量を、載荷能力が高い形状であるア
ーチ型の上鏡蓋で受けとめる構成なので、従来の箱型遮
蔽プラグに比べて物量を削減できるし、また溶接工数も
削減でき、製作性が向上する。更には原子炉全体のコン
パクト化を図ることができる。 本発明の上鏡蓋型上部構造は、炉容器本体と分離して
別々に設置する構成なので、原子炉容器の多様な様式に
対して適合し易い。 また上鏡蓋型上部構造の内部は、内側の熱遮蔽体と上
鏡蓋外側の冷却による単純な設計で均一温度が得られる
ので、局所的に高温配管が組み込まれる方式（上部流出
入配管）にも適合する。 従来の箱型遮蔽プラグに比べて温度均一化が達成され
易いため、熱変形が小さく、構造健全性の余裕度が向上
する。また炉上部箱型内での主配管破損想定に比べて対
策がとり易く安全性が向上する。 引き抜き型炉心上部機構を搭載・支持する部分は水平
面度の寸法精度が要求されるが、本発明の支持方式では
上鏡蓋での支持部分が限定されるので、製作性が高い。The present invention having the above-mentioned structure has the following effects. Since the weight of the upper core mechanism is received by the arch-shaped upper mirror lid, which has a shape with high loading capacity, the amount of material can be reduced compared with the conventional box-shaped shield plug, and the man-hours for welding can also be reduced, thus improving manufacturability. improves. Furthermore, the entire reactor can be made compact. Since the upper mirror lid type upper structure of the present invention is configured to be installed separately from the reactor vessel body, it is easy to adapt to various types of reactor vessels. In addition, the inside of the upper lid type upper structure can obtain a uniform temperature with a simple design by cooling the inner heat shield and the outside of the upper lid, so a system in which high temperature piping is incorporated locally (upper inflow and outflow piping) Also fits. Compared with the conventional box-shaped shield plug, temperature uniformity is easily achieved, so thermal deformation is small and the structural soundness margin is improved. In addition, compared to the assumption of main pipe damage inside the furnace upper box, it is easier to take measures and safety is improved. Although the dimensional accuracy of horizontal flatness is required for the part on which the pull-out type core upper part mechanism is mounted and supported, the support system of the present invention limits the part supported by the upper mirror lid, and is therefore highly manufacturable.
【図１】本発明に係る上鏡蓋型原子炉容器の一実施例を
示す全体構成図。FIG. 1 is an overall configuration diagram showing an embodiment of a top-cover-type reactor vessel according to the present invention.
【図２】炉容器本体と上鏡蓋との説明図。FIG. 2 is an explanatory view of a furnace container main body and an upper mirror lid.
【図３】熱遮蔽体の構造説明図。FIG. 3 is a structural explanatory view of a heat shield.
【図４】上鏡蓋型上部構造の据え付け状態を示す説明
図。FIG. 4 is an explanatory view showing an installed state of the upper mirror lid type upper structure.
１０ 炉容器本体 ２０ 炉心 ２２ コールドレグ配管 ２４ ホットレグ配管 ２６ 引き抜き型炉心上部機構 ３０ 上鏡蓋型上部構造 ３２ 上鏡蓋 ３４ 熱遮蔽体 ３６ 開口 ３８ 円筒部 ４０ フランジ部 ５４ 貫通部 ５６ ベローズ ６０ 床コンクリート ６２，６４ 追加遮蔽 10 Reactor Vessel Main Body 20 Core 22 Cold Leg Piping 24 Hot Leg Piping 26 Extraction Type Core Upper Mechanism 30 Upper Mirror Lid Upper Structure 32 Upper Mirror Lid 34 Heat Shield 36 Open 38 Cylinder 40 Flange 54 Penetration 56 Bellows 60 Floor Concrete 62 , 64 additional shielding
Claims (3)
うようにに位置してカバーガスバウンダリを形成し、前
記炉容器本体とは分離して別々に支持される上鏡蓋型上
部構造との組み合わせからなり、 該上鏡蓋上部構造は、アーチ型構造で中央に開口を備え
該開口の内周側にフランジ部を有する上鏡蓋と、該上鏡
蓋の下方に設けた熱遮蔽体とからなり、 引き抜き型炉心上部機構を前記上鏡蓋のフランジ部上で
支持するようにしたことを特徴とする上鏡蓋型原子炉容
器。1. A reactor vessel main body for a fast reactor, and an upper mirror lid-type upper portion that is positioned so as to cover the upper portion of the furnace vessel body and forms a cover gas boundary and is separately supported from the furnace vessel body. The upper structure of the upper mirror lid is an arch-shaped structure and has an opening in the center and a flange portion on the inner peripheral side of the opening, and a heat provided below the upper cover. An upper reactor lid type reactor vessel comprising a shield and a pull-out reactor upper core mechanism supported on the flange portion of the upper reactor lid.
設し、上鏡蓋のフランジ部は該円筒部下端内周側に設け
られていて、上鏡蓋の上方に該上鏡蓋とほぼ同径の開口
を有する床コンクリートが位置し、前記フランジ部上か
ら床コンクリート上面に達するように、外周側の固定式
と内周側の可動式の二重の追加遮蔽を設けた請求項１記
載の上鏡蓋型原子炉容器。2. A cylindrical portion is provided so as to extend downward from a central opening of the upper mirror lid, and a flange portion of the upper mirror lid is provided on an inner peripheral side of a lower end of the cylindrical portion, and the upper mirror is provided above the upper mirror lid. A floor concrete having an opening having substantially the same diameter as the lid is located, and a double type additional shield is provided on the outer peripheral side and on the inner peripheral side so as to reach the floor concrete upper surface from above the flange portion. Item 1. The upper mirror lid type reactor vessel according to Item 1.
口を通ってからほぼ直角に曲がり上鏡蓋を貫通して設け
られ、該貫通部にベローズを設けて配管熱膨張変位を吸
収する請求項１又は２記載の上鏡蓋型原子炉容器。3. An upper inflow / outflow pipe is provided at a substantially right angle after passing through an upper opening of a furnace vessel main body and penetrating an upper mirror lid, and a bellows is provided at the penetrating portion to absorb thermal expansion displacement of the pipe. The upper mirror lid type reactor vessel according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6221135A JP2986348B2 (en) | 1994-08-23 | 1994-08-23 | Upper head reactor vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6221135A JP2986348B2 (en) | 1994-08-23 | 1994-08-23 | Upper head reactor vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0862371A true JPH0862371A (en) | 1996-03-08 |
| JP2986348B2 JP2986348B2 (en) | 1999-12-06 |
Family
ID=16762012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6221135A Expired - Fee Related JP2986348B2 (en) | 1994-08-23 | 1994-08-23 | Upper head reactor vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2986348B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106601312A (en) * | 2017-01-19 | 2017-04-26 | 清华大学天津高端装备研究院 | ADS (accelerator driven sub-critical system) integrated reactor top structure and nuclear power generation equipment |
-
1994
- 1994-08-23 JP JP6221135A patent/JP2986348B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106601312A (en) * | 2017-01-19 | 2017-04-26 | 清华大学天津高端装备研究院 | ADS (accelerator driven sub-critical system) integrated reactor top structure and nuclear power generation equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2986348B2 (en) | 1999-12-06 |
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