JP5616236B2 - Boiling water reactor and its ring for steam separator - Google Patents

Boiling water reactor and its ring for steam separator Download PDF

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JP5616236B2
JP5616236B2 JP2011005465A JP2011005465A JP5616236B2 JP 5616236 B2 JP5616236 B2 JP 5616236B2 JP 2011005465 A JP2011005465 A JP 2011005465A JP 2011005465 A JP2011005465 A JP 2011005465A JP 5616236 B2 JP5616236 B2 JP 5616236B2
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steam
ring
separator
connecting plate
boiling water
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JP2012145521A (en
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栄樹 工藤
栄樹 工藤
幸治 石澤
幸治 石澤
篤志 千葉
篤志 千葉
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Hitachi GE Nuclear Energy Ltd
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    • 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
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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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    • Y02E30/30—Nuclear fission reactors

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Description

本発明は沸騰水型原子炉及びその気水分離器用リングに係り、特に、炉心で発生した蒸気と水を含む気水混合流が供給される複数の気水分離器の据付の仕方を改良した沸騰水型原子炉及びその気水分離器用リングに関するものである。   The present invention relates to a boiling water reactor and a ring for a steam / water separator, and more particularly, an improved method of installing a plurality of steam / water separators to which a steam / water mixed flow including steam and water generated in a reactor core is supplied. The present invention relates to a boiling water reactor and a ring for a steam separator.

一般に、沸騰水型原子炉は、原子炉圧力容器内に、複数の燃料集合体を装荷した炉心が配置されている。この炉心内の燃料集合体で発生した熱によって冷却材(軽水)を加熱し沸騰させることで、冷却材の一部が蒸気になり、発生した蒸気は、原子炉圧力容器から排出されてタービンへ送られ、タービンを回転させるものである。タービンには発電機が連結されていて、タービンで発電機を回転することで電力が発生する。   Generally, in a boiling water reactor, a core loaded with a plurality of fuel assemblies is disposed in a reactor pressure vessel. By heating and boiling the coolant (light water) with the heat generated in the fuel assemblies in the core, a part of the coolant becomes steam, and the generated steam is discharged from the reactor pressure vessel and sent to the turbine. Sent to rotate the turbine. A generator is connected to the turbine, and electric power is generated by rotating the generator with the turbine.

上記した炉心で発生した蒸気と水を含む気水混合流が供給される気水分離器は、その気水混合流に含まれる蒸気と水とを分離して、蒸気を蒸気乾燥器へ送る機能を有している。   The steam-water separator supplied with the steam-water mixed stream containing steam and water generated in the above-mentioned core separates steam and water contained in the steam-water mixed stream and sends the steam to the steam dryer. have.

この気水分離器は、気水分離器の下に取り付けてあるスタンドパイプを、シュラウドヘッドの鏡板に開けられている気水分離器接続用穴に挿入し、ここを溶接することで接合され鏡板に固定されている。通常、気水分離器は、鏡板の中心から距離が小さい順に取り付けられていく。   This steam / water separator is joined by inserting a stand pipe attached under the steam / water separator into a steam / water separator connection hole in the shroud head's mirror and welding it. It is fixed to. Usually, the steam separator is attached in ascending order of distance from the center of the end plate.

こうして、気水分離器が全て設置された後、最外周の位置までにある一列全ての気水分離器を、長尺で細長い角柱で形成されたタイバーを用いて繋ぎ、タイバーを全ての気水分離器の上部外側面に溶接して固定している。このタイバーは、１本の気水分離器に対して３方向に交差するよう気水分離器の取り付け位置を変えて溶接され、気水分離器を固定している。タイバーは、気水分離器の上部を一体化することにより、気水分離器全体の剛性を高める役割を担っている。   Thus, after all the air / water separators are installed, all the air / water separators in a row up to the outermost peripheral position are connected using tie bars formed of long and narrow prisms. It is fixed by welding to the upper outer surface of the separator. This tie bar is welded by changing the mounting position of the steam separator so as to intersect in one of three directions with respect to one steam separator, thereby fixing the steam separator. The tie bar plays a role of increasing the rigidity of the whole steam separator by integrating the upper part of the steam separator.

この気水分離器の上部支持構造については、隣接する気水分離器同士を、各気水分離器の上端面に放射状に配置した短冊状の連結板により連結するもの(特許文献１)や、気水分離器間の上部隙間に溶接で固定された連結板を設け、この連結板を介して隣り合う気水分離器同士を連結するもの(特許文献２)が、既に提案されている。   About the upper support structure of this steam-water separator, adjacent steam-water separators are connected by strip-shaped connecting plates arranged radially on the upper end surface of each steam-water separator (Patent Document 1), There has already been proposed (Patent Document 2) in which a connecting plate fixed by welding is provided in the upper gap between the steam-water separators, and the adjacent steam-water separators are connected via this connecting plate.

特開２００７−２４６７６号公報JP 2007-24676 A 特開２０００−１０５２９１号公報JP 2000-105291 A

しかしながら、上述した従来技術の長尺で細長い角柱で形成されたタイバーを用いた場合は、タイバーが通る鏡板上の気水分離器を、鏡板に対してできるだけ垂直に精度良く据付けるか、或いは気水分離器の配置状態に合わせてタイバーを修正加工して据付ける必要がある。   However, in the case of using the above-described conventional long and narrow tie bar, the steam separator on the end plate through which the tie bar passes is installed with high accuracy as perpendicular to the end plate as possible. It is necessary to modify and install the tie bar according to the arrangement of the water separator.

また、特許文献１のように隣り合う気水分離器を連結板で連結するタイバーの場合は、これら課題を解消することができるものの、上述した従来技術に比べ連結板が多くなり部品点数が多くなるため、タイバー単品の製作工数、タイバーを気水分離器に溶接する工数は従来と同程度となることが予想される。   Moreover, in the case of the tie bar which connects adjacent steam-water separators with a connecting plate as in Patent Document 1, these problems can be solved, but the connecting plate is increased and the number of parts is increased as compared with the above-described conventional technology. Therefore, it is expected that the number of man-hours for manufacturing a single tie bar and the number of man-hours for welding the tie bar to the steam / water separator will be about the same as the conventional one.

本発明は上述の点に鑑みなされたもので、その目的とするところは、簡単な構成で、部品点数及び溶接箇所を少なくすることが可能となり、工数低減が図れる沸騰水型原子炉及びその気水分離器用リングを提供することにある。   The present invention has been made in view of the above points, and the object of the present invention is a boiling water reactor capable of reducing the number of parts and welding locations with a simple configuration and reducing the number of man-hours and its gas. It is to provide a water separator ring.

本発明の沸騰水型原子炉の気水分離器用リングは、上記目的を達成するために、沸騰水型原子炉の炉内に設置されると共に、二重の円筒により構成される気水分離器の該二重の円筒の外側に位置する円筒の上端に取付けられ、隣接する気水分離器と１箇所で連結する少なくとも１つの連結板が一体となっていることを特徴とする。 In order to achieve the above object, a ring for a steam separator of a boiling water reactor according to the present invention is installed in a furnace of a boiling water reactor and is composed of a double cylinder . At least one connecting plate that is attached to the upper end of the cylinder located outside the double cylinder and is connected to the adjacent steam separator at one location is integrated.

また、本発明の沸騰水型原子炉は、上記目的を達成するために、原子炉圧力容器の炉心上方に、該炉心で発生した蒸気から炉内の湿分を分離する複数の気水分離器を備え、前記複数の気水分離器は、該気水分離器の上端に取付けられているリングが連結板を介して連結されている沸騰水型原子炉において、前記リングは、上記構成の沸騰水型原子炉の気水分離器用リングであることを特徴とする。   In order to achieve the above object, the boiling water reactor according to the present invention has a plurality of steam separators for separating moisture in the reactor from steam generated in the reactor above the core of the reactor pressure vessel. The plurality of steam-water separators is a boiling water reactor in which a ring attached to an upper end of the steam-water separator is connected via a connecting plate, and the ring is a boiling water heater having the above-described configuration. It is a water reactor water / water separator ring.

本発明によれば、簡単な構成で、部品点数及び溶接箇所を少なくすることが可能となり、工数低減が図れる効果がある。   According to the present invention, it is possible to reduce the number of parts and welding locations with a simple configuration, and there is an effect that man-hours can be reduced.

本発明の沸騰水型原子炉の一実施例を示し、相互に隣り合う気水分離器を連結した状態の平面図である。It is a top view of the state which showed one Example of the boiling water reactor of this invention, and connected the mutually adjacent steam-water separator. 図１の気水分離器が採用される改良型の沸騰水型原子炉を示す断面図である。It is sectional drawing which shows the improved boiling water reactor in which the steam-water separator of FIG. 1 is employ | adopted. 本発明の一実施例に採用される気水分離器及びスタンドパイプを示す断面図である。It is sectional drawing which shows the steam-water separator and stand pipe employ | adopted as one Example of this invention. 本発明の一実施例に採用される連結板同士を連結する一例を示す気水分離器上端のリング周辺部分を示す断面図である。It is sectional drawing which shows the ring peripheral part of the steam-water separator upper end which shows an example which connects the connection plates employ | adopted as one Example of this invention. 図４における連結板の連結部を拡大して側面方向から見た断面図である。It is sectional drawing which expanded the connection part of the connection board in FIG. 4, and was seen from the side surface direction. 本発明に一実施例に採用される連結板同士を連結する他の例を示す気水分離器上端のリング周辺部分の断面図である。It is sectional drawing of the ring periphery part of the steam-water separator upper end which shows the other example which connects the connection plates employ | adopted as one Example by this invention. 図６における連結板の連結部を拡大して示す平面図である。It is a top view which expands and shows the connection part of the connection board in FIG. 本発明に一実施例に採用される連結板同士を連結する更に他の例を示す気水分離器上端のリング周辺部分の断面図である。It is sectional drawing of the ring periphery part of the steam-water separator upper end which shows the further another example which connects the connection plates employ | adopted as one Example by this invention. 図８における連結板の連結部を拡大して側面方向から見た断面図である。It is sectional drawing which expanded the connection part of the connection board in FIG. 8, and was seen from the side surface direction. 本発明に一実施例に採用される連結板同士を連結する更に他の例を示す気水分離器上端のリング周辺部分の断面図である。It is sectional drawing of the ring periphery part of the steam-water separator upper end which shows the further another example which connects the connection plates employ | adopted as one Example by this invention. 図１０における連結板の連結部を拡大して側面方向から見た断面図である。It is sectional drawing which expanded the connection part of the connection board in FIG. 10, and was seen from the side surface direction.

以下、本発明の実施の形態について図面を参照して説明する。本実施例の気水分離器の上端に取り付く気水分離器用リングの詳細を説明する前に、この気水分離器用リングが適用される改良型の沸騰水型原子炉について、図２を用いて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. Before explaining the details of the ring for the steam separator attached to the upper end of the steam separator of the present embodiment, an improved boiling water reactor to which the steam separator ring is applied will be described with reference to FIG. explain.

図２に示すように、改良型の沸騰水型原子炉は、原子炉圧力容器１を備え、その内部には炉心２を備えている。炉心２には複数の燃料集合体が装荷されていて、炉心シュラウド９は、これらを取り囲むよう原子炉圧力容器１内に配置されている。   As shown in FIG. 2, the improved boiling water reactor includes a reactor pressure vessel 1 and a reactor core 2 inside thereof. The core 2 is loaded with a plurality of fuel assemblies, and the core shroud 9 is disposed in the reactor pressure vessel 1 so as to surround them.

シュラウドヘッド４は、炉心シュラウド９の上端部に設置されていて、複数の気水分離器３がシュラウドヘッド４に設置されている。また、蒸気乾燥器１０は、気水分離器３の上方で原子炉圧力容器１に設置されている。環状の流路であるダウンカマ１１が、原子炉圧力容器１と炉心シュラウド９の間に形成されている。また、複数のインターナルポンプ１２が原子炉圧力容器１の底部に設置され、インターナルポンプ１２のインペラ(図示せず)は、ダウンカマ１１内に配置されている。蒸気をタービンへ送るための主蒸気配管１３が、原子炉圧力容器１に接続されている。   The shroud head 4 is installed at the upper end of the core shroud 9, and a plurality of steam separators 3 are installed in the shroud head 4. The steam dryer 10 is installed in the reactor pressure vessel 1 above the steam separator 3. A downcomer 11, which is an annular flow path, is formed between the reactor pressure vessel 1 and the core shroud 9. A plurality of internal pumps 12 are installed at the bottom of the reactor pressure vessel 1, and an impeller (not shown) of the internal pump 12 is disposed in the downcomer 11. A main steam pipe 13 for sending steam to the turbine is connected to the reactor pressure vessel 1.

ダウンカマ１１部の冷却水(冷却材)は、インペラにより加圧され、ディフューザ(図示せず)で整流後、シュラウドサポートレグ(図示せず)の間を通って、下部プレナム１４に送られる過程を経て炉心２へ供給される。この冷却水は、炉心２を通過する際、炉心２内に配置された燃料集合体内の核燃料物質の核***で発生する熱によって加熱され、一部が蒸気になる。この蒸気を含む冷却水は、気水混合流の状態で炉心から気水分離器３内へ供給される。気水分離器３は、内部の固定翼により冷却水を除去し、蒸気を排出する。蒸気は、蒸気乾燥器１０によって含まれている液滴が、さらに除去されて乾燥度を増した上で、主蒸気配管１３に排出され、この主蒸気配管１３を通ってタービンに供給されてタービンを回転させ、タービンに連結された発電機が回転して電力を発生するものである。   The cooling water (coolant) of the downcomer 11 part is pressurized by an impeller, rectified by a diffuser (not shown), passed through a shroud support leg (not shown), and sent to the lower plenum 14. Then, it is supplied to the core 2. When the cooling water passes through the core 2, the cooling water is heated by heat generated by fission of nuclear fuel material in the fuel assembly disposed in the core 2, and a part thereof becomes steam. The cooling water containing the steam is supplied into the steam separator 3 from the core in a steam-water mixed state. The steam separator 3 removes the cooling water by the fixed blades inside and discharges the steam. The steam is further removed by the droplets contained by the steam dryer 10 to increase the dryness, and then is discharged to the main steam pipe 13 and supplied to the turbine through the main steam pipe 13 for the turbine. , And the generator connected to the turbine rotates to generate electric power.

一方、タービンから排出された蒸気は、復水器で凝縮されて水になる。この水は、給水として給水配管により原子炉圧力容器１内に供給される。   On the other hand, the steam discharged from the turbine is condensed into water by the condenser. This water is supplied into the reactor pressure vessel 1 through a water supply pipe as water supply.

また、気水分離器３で分離された冷却水は、ダウンカマ１１内に排出される。この冷却水は、給水配管によって供給される給水とダウンカマ１１内で混合され、インターナルポンプ１２内に流入する。このサイクルを繰り返すことで発電が行われる。   In addition, the cooling water separated by the steam separator 3 is discharged into the downcomer 11. This cooling water is mixed in the downcomer 11 with the water supplied through the water supply pipe and flows into the internal pump 12. Electricity is generated by repeating this cycle.

次に、上述した気水分離器３について、図３を用いて説明する。   Next, the steam / water separator 3 will be described with reference to FIG.

沸騰水型原子炉に用いられる気水分離器３は、図３に示すように、縦型軸流遠心式で、二重の円筒より構成されている。炉心２を出た気水混合体は、炉心上部プレナム１５（図２参照）からスタンドパイプ１６を通って気水分離器３の下端に入り、ここで入り口ベーン１７により回転運動が与えられ、円筒内を自由渦巻運動で上向きに移動していく間に、それに伴う遠心効果によって水と蒸気が分離される。   As shown in FIG. 3, the steam separator 3 used in the boiling water nuclear reactor is a vertical axial flow centrifugal type and is composed of a double cylinder. The steam-water mixture exiting the core 2 enters the lower end of the steam-water separator 3 through the stand pipe 16 from the core upper plenum 15 (see FIG. 2), where it is given rotational motion by the inlet vane 17 and is cylindrical. While moving upward in a free spiral motion, water and steam are separated by the centrifugal effect associated therewith.

リング８は、気水分離器３を構成する円筒内の最上部と中間部、及び下方部の３箇所に設置されており、分離された水は、リング８にて集合して外側の円筒側へ排出され降下し、その後、再び炉心２の領域へ戻る。一方、分離された蒸気部分は、そのまま軸方向に進んで、蒸気乾燥器１０に入る。   The ring 8 is installed in three places, the uppermost part, the middle part, and the lower part in the cylinder constituting the steam separator 3, and the separated water gathers in the ring 8 and is placed on the outer cylinder side. Is then discharged and then returned to the core 2 region again. On the other hand, the separated steam portion proceeds in the axial direction as it is and enters the steam dryer 10.

本実施例では、気水分離器３の最上部に取り付けられているリング８と連結板７を一体化し、気水分離器３自体に相互に隣り合う気水分離器３を連結するための機能を持たせた構造としているので、以下、これについて記述する。   In this embodiment, the ring 8 and the connecting plate 7 attached to the top of the steam / water separator 3 are integrated, and the function for connecting the steam / water separators 3 adjacent to each other to the steam / water separator 3 itself. This is described below.

まず、先端に溶接開先がある連結板７を一体化したリング８について説明する。先端に溶接開先がある連結板７を一体化したリング８は、図４に示すごとく、先端に溶接開先がある相互の連結板７の溶接開先を突き合わせ、その開先部分を１箇所溶接１８することで、連結板７を介して相互に隣り合う気水分離器３を連結するものである。この状態を図１に示す。   First, the ring 8 in which the connecting plate 7 having a weld groove at the tip is integrated will be described. As shown in FIG. 4, the ring 8 in which the connecting plate 7 having the weld groove at the tip is integrated is abutted with the weld groove of the connecting plate 7 having the weld groove at the tip, and the groove portion is located at one place. By welding 18, the steam-water separators 3 adjacent to each other are connected via the connecting plate 7. This state is shown in FIG.

図１に示す如く、気水分離器３の最上部に取り付けられているリング８は、円周方向に等間隔に、それぞれの先端に溶接開先が６個の連結板７と一体になって形成されている。リング８と連結板７との一体化は、例えば鋳造、機械加工で形成することが可能である。   As shown in FIG. 1, the ring 8 attached to the uppermost part of the steam / water separator 3 is integrated with the connecting plate 7 having six welding grooves at the respective ends at equal intervals in the circumferential direction. Is formed. The ring 8 and the connecting plate 7 can be integrated by, for example, casting or machining.

このように形成されたリング８と一体化された6個の各連結板７は、隣接する複数の各気水分離器３の最上部に取り付けられている同一構成のリング８の各連結板７と、その先端にある溶接開先同士を突き合わせて溶接１８することで、複数の隣接する気水分離器３同士を連結している。図５は、隣接する連結板７同士の溶接開先に溶接１８を実施した後を示すものである。気水分離器３の最上部に取り付けられているリング８と一体化された連結板７同士の溶接開先が溶接１８されていることが分かる。   Each of the six connecting plates 7 integrated with the ring 8 formed in this way is connected to the uppermost part of each of the plurality of adjacent steam separators 3. And the welding groove | channels in the front-end | tip are faced | matched and it welds 18, By this, several adjacent steam-water separators 3 are connected. FIG. 5 shows the state after welding 18 is performed on the welding groove between adjacent connecting plates 7. It can be seen that the weld groove of the connecting plates 7 integrated with the ring 8 attached to the top of the steam separator 3 is welded 18.

このように構成することにより、連結板７を溶接する箇所は６箇所であることから、先行技術に比べて部品点数、及び溶接箇所が少なくなるため工数低減が可能である。また、従来技術の課題であった気水分離器３の据付精度やタイバーの修正加工を考慮する必要は無くなることは勿論、先行技術に比べ、タイバー単品の製作が不要になることから部品点数を減らすこともできる。更に、隣り合う気水分離器３同士を連結するためには、少なくとも１箇所連結板７を設けてあるリング８が必要で、気水分離器３の上部に要求される剛性に応じて、林立する気水分離器３の位置毎に連結板７を増やすことにより、気水分離器３の上部を全体として連結することが可能になる。   By comprising in this way, since the location which welds the connection plate 7 is six places, since a number of parts and a welding location decrease compared with a prior art, a man-hour reduction is possible. In addition, it is not necessary to consider the installation accuracy of the steam separator 3 and the tie bar correction process, which were the problems of the prior art, and of course, it is not necessary to manufacture a single tie bar as compared to the prior art. It can also be reduced. Further, in order to connect the adjacent steam-water separators 3 to each other, a ring 8 provided with at least one connecting plate 7 is required. Depending on the rigidity required for the upper part of the steam-water separator 3, forest It becomes possible to connect the upper part of the steam-water separator 3 as a whole by increasing the connection plate 7 for every position of the steam-water separator 3 to perform.

次に、図６及び図７にリング８と一体に形成された連結板７同士を連結する他の例を示す。   Next, FIG. 6 and FIG. 7 show another example in which connecting plates 7 formed integrally with the ring 8 are connected to each other.

図６及び図７に示す例は、先端にはめ込み式連結部がある連結板７を一体化したリング８とする例である。この例は、連結板７の先端の一方側をはめ込み部のオス側７ａ、他方側をはめ込み部のメス側７ｂとし、これら連結板７のはめ込み部のオス側７ａとメス側７ｂを組み合わせることで、相互に隣り合う気水分離器３を連結することが可能な構造となっている。両者を組み合わせる際には、一方の気水分離器３を鏡板に取り付けた後、他方の気水分離器３を上方からはめ込むことで、両者を連結することができる。 The example shown in FIG.6 and FIG.7 is an example which makes the ring 8 which integrated the connection board 7 which has a fitting type connection part at the front-end | tip. In this example, one side of the tip of the connecting plate 7 is the male side 7a of the fitting portion, the other side is the female side 7b of the fitting portion, and the male side 7a and the female side 7b of the fitting portion of these connecting plates 7 are combined. In this structure, the steam-water separators 3 adjacent to each other can be connected. When combining the two is one of the steam-water separator 3 after mounting the mirror plate, by fitting the other steam-water separator 3 from above, can be coupled to each other.

このような本実施例の構成でも上述した実施例と同様、従来技術の課題は解消しており、先行技術よりも部品点数は少なくなるし、溶接箇所が少なくなるため工数低減が可能である。また、少なくとも１箇所連結板７を設けてあるリング８があれば、隣り合う気水分離器３同士を連結でき、林立する気水分離器３の位置毎に連結板７を増やすことにより剛性を上げることができる。   Even in the configuration of this embodiment, as in the above-described embodiment, the problems of the prior art are solved, and the number of parts is smaller than that of the prior art, and the number of welds is reduced, so that the number of man-hours can be reduced. Further, if there is a ring 8 provided with at least one connecting plate 7, adjacent steam-water separators 3 can be connected to each other, and rigidity is increased by increasing the connecting plate 7 for each position of the standing steam-water separator 3. Can be raised.

尚、本実施例の構成では、連結部に溶接が不要な構造となっているが、必要に応じて連結部に溶接を施しても良い。   In addition, in the structure of a present Example, although it becomes a structure where welding is unnecessary for a connection part, you may weld a connection part as needed.

次に、図８及び図９にリング８と一体に形成された連結板７同士を連結する更に他の例を示す。   Next, still another example in which connecting plates 7 formed integrally with the ring 8 are connected to each other is shown in FIGS.

図８及び図９に示す例は、先端に摺り合わせ式連結部がある連結板７を一体化したリング８とする例である。この例は、連結板７を、隣接する互いの連結板７の先端を直角に突出させてＬ字状に形成し、一方の連結板７のＬ字状の突出部分を他方のＬ宇状の突出部分と摺り合わせるように組み合わせることで、相互に隣り合う気水分離器３を連結することが可能な構造となっている。両者を組み合わせる際には、一方の気水分離器３を鏡板に取り付けた後、他方の気水分離器３を周方向に回転させて摺り合わせ部を回避する形で鏡板にある穴へ挿入した後、連結板７同士が摺り合わさるよう、所定の位置まで回転させて取り付けることで双方を連結することができる。 The example shown in FIGS. 8 and 9 is an example in which a connecting plate 7 having a sliding connecting portion at the tip is an integrated ring 8. In this example, the connecting plate 7 is formed in an L shape by projecting the tips of the adjacent connecting plates 7 at right angles, and the L-shaped protruding portion of one connecting plate 7 is formed in the other L-U shape. By combining them so as to slide on the projecting portions, it is possible to connect the steam-water separators 3 adjacent to each other. When combining the two is one of the steam-water separator 3 after mounting the mirror plate, the hole in the mirror plate in a manner to avoid lapping portion by rotating the other steam-water separator 3 in the circumferential direction After inserting, both can be connected by rotating to a predetermined position and attaching so that the connecting plates 7 slide against each other.

このような本実施例の構成でも上述した実施例と同様、従来技術の課題は解消しており、先行技術よりも部品点数は少なくなるし、溶接箇所が少なくなるため工数低減が可能である。また、少なくとも１箇所連結板７を設けてあるリング８があれば、隣り合う気水分離器３同士を連結でき、林立する気水分離器３の位置毎に連結板７を増やすことにより剛性を上げることができる。   Even in the configuration of this embodiment, as in the above-described embodiment, the problems of the prior art are solved, and the number of parts is smaller than that of the prior art, and the number of welds is reduced, so that the number of man-hours can be reduced. Further, if there is a ring 8 provided with at least one connecting plate 7, adjacent steam-water separators 3 can be connected to each other, and rigidity is increased by increasing the connecting plate 7 for each position of the standing steam-water separator 3. Can be raised.

尚、本実施例の構成では、連結部に溶接が不要な構造となっているが、必要に応じて連結部に溶接を施しても良い。   In addition, in the structure of a present Example, although it becomes a structure where welding is unnecessary for a connection part, you may weld a connection part as needed.

次に、図１０及び図１１にリング８と一体に形成された連結板７同士を連結する更に他の例を示す。   Next, still another example in which connecting plates 7 formed integrally with the ring 8 are connected to each other in FIGS. 10 and 11 is shown.

図１０及び図１１に示す例は、先端にピン接続式の連結部がある連結板７を一体化したリング８とする例である。この例は、先端に円筒穴７ｃを有する連結板７に、先端にピン７ｄを有する連結板７を重ね、ピン７ｄを円筒穴７ｃに挿入することで、相互に隣り合う気水分離器３を連結することが可能な構造となっている。両者を組み合わせる際には、ピン７ｄが下向きに連結板７に設けられている場合、円筒穴７ｃがある連結板７を有する気水分離器３を先に鏡板に取り付け、上からピン７ｄが円筒穴７ｃに挿入されるよう、もう一方の気水分離器３を鏡板に取り付けることで双方を連結することができる。ピン７ｄが上向きの場合には、上記と逆の取り付け手順となる。 The example shown in FIG.10 and FIG.11 is an example made into the ring 8 which integrated the connection board 7 which has a pin connection type connection part in the front-end | tip. In this example, the connecting plate 7 having the cylindrical hole 7c at the tip is overlapped with the connecting plate 7 having the pin 7d at the tip, and the pin 7d is inserted into the cylindrical hole 7c, so that the steam-water separators 3 adjacent to each other can be connected. It has a structure that can be connected. When combining both, if the pin 7d is provided in the connecting plate 7 down, attached to the mirror plate steam separator 3 having a connecting plate 7 there is a cylindrical bore 7c above, pins 7d from the top to be inserted into the cylindrical hole 7c, it can be connected both by attaching the other steam-water separator 3 to the mirror plate. When the pin 7d faces upward, the mounting procedure is the reverse of the above.

このような本実施例の構成でも上述した実施例と同様、従来技術の課題は解消しており、先行技術よりも部品点数は少なくなるし、溶接箇所が少なくなるため工数低減が可能である。また、少なくとも１箇所連結板７を設けてあるリング８があれば、隣り合う気水分離器３同士を連結でき、林立する気水分離器３の位置毎に連結板７を増やすことにより剛性を上げることができる。   Even in the configuration of this embodiment, as in the above-described embodiment, the problems of the prior art are solved, and the number of parts is smaller than that of the prior art, and the number of welds is reduced, so that the number of man-hours can be reduced. Further, if there is a ring 8 provided with at least one connecting plate 7, adjacent steam-water separators 3 can be connected to each other, and rigidity is increased by increasing the connecting plate 7 for each position of the standing steam-water separator 3. Can be raised.

尚、本実施例の構成では、連結部に溶接が不要な構造となっているが、必要に応じて連結部に溶接を施しても良い。   In addition, in the structure of a present Example, although it becomes a structure where welding is unnecessary for a connection part, you may weld a connection part as needed.

上述した各実施例では、リング８と一体化された連結板７が６箇所の例（隣接する気水分離器３の全方向に設けてある例）について説明したが、隣り合う気水分離器３同士を連結するためには、少なくとも１箇所連結板７を設けてあるリング８があれば（例えば、気水分離器３をリング８と一体の１箇所の連結板７でうず巻き状に固定することで可能）良く、設置場所の機器に要求される剛性に応じて、連結板７を３箇所或いは４箇所等適宜設定すれば良いことは勿論である。   In each of the above-described embodiments, the example in which the connecting plate 7 integrated with the ring 8 is provided at six places (example in which all the adjacent steam-water separators 3 are provided) has been described. In order to connect the three, if there is a ring 8 provided with at least one connecting plate 7 (for example, the steam-water separator 3 is fixed in a spiral shape with one connecting plate 7 integrated with the ring 8. Of course, the connecting plate 7 may be appropriately set at three or four locations according to the rigidity required for the equipment at the installation location.

１…原子炉圧力容器、２…炉心、３…気水分離器、４…シュラウドヘッド、６…タイバー、７…連結板、８…リング、９…炉心シュラウド、１０…蒸気乾燥器、１１…ダウンカマ、１２…インターナルポンプ、１３…主蒸気配管、１４…下部プレナム、１５…炉心上部プレナム、１６…スタンドパイプ、１７…入りロベーン、１８…溶接。 DESCRIPTION OF SYMBOLS 1 ... Reactor pressure vessel, 2 ... Core, 3 ... Steam separator, 4 ... Shroud head , 6 ... Tie bar, 7 ... Connecting plate, 8 ... Ring, 9 ... Core shroud, 10 ... Steam dryer, 11 ... Downcomer , 12 ... Internal pump, 13 ... Main steam pipe, 14 ... Lower plenum, 15 ... Core upper plenum, 16 ... Stand pipe, 17 ... Entered vane, 18 ... Welding.

Claims (7)

沸騰水型原子炉の炉内に設置されると共に、二重の円筒により構成される気水分離器の該二重の円筒の外側に位置する円筒の上端に取付けられ、隣接する気水分離器と１箇所で連結する少なくとも１つの連結板が一体となっていることを特徴とする沸騰水型原子炉の気水分離器用リング。 Installed in the boiling water reactor and attached to the upper end of a cylinder located outside the double cylinder of the double water cylinder constituted by a double cylinder , and adjacent to the water / water separator And a ring for a steam separator of a boiling water reactor, characterized in that at least one connecting plate connected in one place is integrated. 請求項１に記載の沸騰水型原子炉の気水分離器用リングおいて、
前記連結板の先端に開先が形成され、該連結板の開先を突き合わせ、該突き合わせ部を溶接することで、隣接する少なくとも１方向の前記気水分離器を連結することを特徴とする沸騰水型原子炉の気水分離器用リング。 In the ring for a steam separator of a boiling water reactor according to claim 1,
A groove is formed at a tip of the connecting plate, the groove of the connecting plate is abutted, and the abutting portion is welded to connect the adjacent steam separators in at least one direction. Ring for steam reactor of water reactor. 請求項１に記載の沸騰水型原子炉の気水分離器用リングおいて、
前記連結板の先端の一方側をはめ込み部のオス側、他方側をはめ込み部のメス側とし、該はめ込み部のオス側とメス側を組み合わせることで、隣接する少なくとも１方向の気水分離器を連結することを特徴とする沸騰水型原子炉の気水分離器用リング。 In the ring for a steam separator of a boiling water reactor according to claim 1,
By connecting one end of the connecting plate to the male side of the fitting portion and the other side to the female side of the fitting portion, and combining the male side and the female side of the fitting portion, the adjacent steam-water separators in at least one direction A ring for a steam separator of a boiling water reactor characterized by being connected. 請求項１に記載の沸騰水型原子炉の気水分離器用リングおいて、
前記連結板は、隣接する互いの連結板の先端を直角に突出させてL字状に形成され、一方の連結板のL字状の突出部分を他方のL字状の突出部分と摺り合わせるように組み合わせることで、隣接する少なくとも１方向の気水分離器を連結することを特徴とする沸騰水型原子炉の気水分離器用リング。 In the ring for a steam separator of a boiling water reactor according to claim 1,
The connecting plate is formed in an L shape by causing the tips of adjacent connecting plates to protrude at right angles, and the L-shaped protruding portion of one connecting plate is slid with the other L-shaped protruding portion. A ring for a steam separator of a boiling water reactor, wherein the steam separators in at least one direction adjacent to each other are connected to each other. 請求項１に記載の沸騰水型原子炉の気水分離器用リングおいて、
前記連結板の先端の一方側に円筒穴が、隣接する連結板の先端の他方側にピンがそれぞれ形成され、かつ、これら両者の連結板を重ね合わせ、前記ピンを円筒穴に挿入することで、隣接する少なくとも１方向の気水分離器を連結することを特徴とする沸騰水型原子炉の気水分離器用リング。 In the ring for a steam separator of a boiling water reactor according to claim 1,
A cylindrical hole is formed on one side of the front end of the connecting plate, and a pin is formed on the other side of the front end of the adjacent connecting plate. Both the connecting plates are overlapped, and the pin is inserted into the cylindrical hole. A ring for a steam separator of a boiling water reactor, wherein the steam separators in at least one direction adjacent to each other are connected. 請求項２乃至５のいずれかに記載の沸騰水型原子炉の気水分離器用リングおいて、
前記連結板は、隣接する前記気水分離器の全方向に対して設けてあることを特徴とする沸騰水型原子炉の気水分離器用リング。 In the ring for a steam separator of a boiling water reactor according to any one of claims 2 to 5,
The ring for a steam-water separator of a boiling water reactor, wherein the connecting plate is provided in all directions of the adjacent steam-water separators. 原子炉圧力容器の炉心上方に、該炉心で発生した蒸気から炉内の湿分を分離する複数の気水分離器を備え、前記複数の気水分離器は、該気水分離器の上端に取付けられているリングが連結板を介して連結されている沸騰水型原子炉において、
前記リングは、請求項１乃至６のいずれかに記載の気水分離器用リングであることを特徴とする沸騰水型原子炉。 A plurality of steam separators for separating moisture in the reactor from steam generated in the reactor pressure vessel are provided above the reactor pressure vessel core, and the plurality of steam separators are disposed at the upper end of the steam separator. In a boiling water reactor in which the attached ring is connected via a connecting plate,
The boiling water reactor according to any one of claims 1 to 6, wherein the ring is a steam-water separator ring according to any one of claims 1 to 6.
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