JP4928907B2 - Rectifier plate slit block - Google Patents

Rectifier plate slit block Download PDF

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Publication number
JP4928907B2
JP4928907B2 JP2006292845A JP2006292845A JP4928907B2 JP 4928907 B2 JP4928907 B2 JP 4928907B2 JP 2006292845 A JP2006292845 A JP 2006292845A JP 2006292845 A JP2006292845 A JP 2006292845A JP 4928907 B2 JP4928907 B2 JP 4928907B2
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rectifying plate
conditioning duct
concrete
air conditioning
rectifying
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JP2008107061A (en
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秀男 平井
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Toshiba Corp
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Toshiba Corp
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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
    • 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

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Description

本発明は、整流板スリットブロックに関するものである。 The present invention relates to a current plate slit block .

一般の放射性物質の貯蔵建屋は、鉄筋コンクリート製の建屋内に燃料貯蔵室を有している
。燃料貯蔵室は、天井スラブと床スラブとの間に形成されている。多数の収納管が、天井
スラブに設置され燃料貯蔵室内に配置されている。燃料貯蔵室には、空気流入通路及び空
気排出通路がそれぞれ連絡されている。複数の整流板が燃料貯蔵室内の空気流入通路側に
配置され、また、複数の整流板が燃料貯蔵室内の空気排出通路側にも配置されている（公
知文献１参照）。 A general radioactive material storage building has a fuel storage room in a reinforced concrete building. The fuel storage chamber is formed between the ceiling slab and the floor slab. A large number of storage tubes are installed in the ceiling slab and arranged in the fuel storage chamber. An air inlet passage and an air outlet passage are communicated with the fuel storage chamber. A plurality of rectifying plates are arranged on the air inflow passage side in the fuel storage chamber, and a plurality of rectifying plates are also arranged on the air discharge passage side in the fuel storage chamber (see known document 1).

原子力発電所から放射性物質貯蔵建屋内に搬入された使用済燃料集合体は、収納管内に収
納され、この使用済燃料集合体は収納管内で一時的に貯蔵される。 The spent fuel assembly carried from the nuclear power plant into the radioactive material storage building is stored in a storage pipe, and this spent fuel assembly is temporarily stored in the storage pipe.

収納管内の使用済燃料集合体からは崩壊熱が発生することから、その崩壊熱を除去するた
め、崩壊熱で加熱された空気を換気する必要がある。 Since decay heat is generated from the spent fuel assembly in the storage tube, it is necessary to ventilate the air heated by the decay heat in order to remove the decay heat.

その換気システムとしては、外部の空気を貯蔵建屋の空気流入通路から取り込み、空気流
入通路である空調ダクトを通り、更に整流板間を通って燃料貯蔵室内の収納管相互間に導
かれる。この空気は、収納管相互間を流れる間に、収納管を冷却し、整流板間を通って空
気排出通路に達し、排出口から外部に排出される。 As the ventilation system, external air is taken from the air inflow passage of the storage building, passes through the air conditioning duct which is the air inflow passage, and is further guided between the storage pipes in the fuel storage chamber through the rectifying plates. The air cools the storage pipe while flowing between the storage pipes, passes between the rectifying plates, reaches the air discharge passage, and is discharged to the outside from the discharge port.

整流板は遮蔽機能の役割も果たしており、収納管内の使用済燃料集合体の冷却性能を低下
させることがないように、整流板配置により圧力損失が低下しない程度に隣接する整流板
相互の間隔を設定している。 The current plates also serve as a shielding function, and the distance between adjacent current plates is set so that the pressure loss is not reduced by the current plate arrangement so as not to reduce the cooling performance of the spent fuel assembly in the storage pipe. It is set.

整流板スリット部の構築は、鉄筋コンクリート構造（ＲＣ構造）では、整流板間の隙間部
分が30cm程度しかないので、現地で整流板躯体部の鉄筋を組み立て、コンクリートを打設
するために木製の型枠を立て込むのは不可能である。 In the construction of the rectifying plate slit part, in the reinforced concrete structure (RC structure), the gap between the rectifying plates is only about 30cm. It is impossible to set a frame.

また、両側の壁及び天井躯体部を現地で構築するには、木製の型枠を現地で立て込み、コ
ンクリートが固まった後に取り外すということは困難である。 In addition, in order to construct the walls and ceiling frame on both sides locally, it is difficult to stand the wooden formwork locally and remove it after the concrete has hardened.

従って、図４に示すように、整流板部分は既成品のコンクリート製品であるプレキャスト
コンクリート１６造で対応し、両側の壁及び天井の側面はプレキャストコンクリートの打
込型枠を使用することで従来は計画していた。
特開２０００−１８７１００号公報 Therefore, as shown in FIG. 4, the current plate part corresponds to 16 precast concrete structures which are ready-made concrete products, and the walls on both sides and the side surfaces of the ceiling use the precast concrete placement molds in the past. I was planning.
JP 2000-187100 A

しかしながら、１枚１枚のプレキャストコンクリート１６の整流板を採用しても、図４に
示すように、現地で一定の隙間（30cm程度）を確保しながら整流板を積み上げる作業が発
生する。さらに、両側の壁５及び天井６躯体部分を構築するためには、仮設の支保工17を
使用せざるを得なかった。この仮設の支保工17を使用することで、両側の壁５及び天井６
にコンクリート８を打設して固まった後に取り外すという作業が発生する。 However, even if one current piece of precast concrete 16 current plate is employed, as shown in FIG. 4, the work of stacking the current plates while securing a certain gap (about 30 cm) at the site occurs. Furthermore, in order to construct the wall 5 and the ceiling 6 housing part on both sides, a temporary supporter 17 has to be used. By using this temporary support 17, the walls 5 and ceiling 6 on both sides
The work of placing the concrete 8 on and removing it after it has hardened occurs.

このように、既製品のコンクリート製品であるプレキャストコンクリート１６を使用した
場合でも、現地で整流板１枚１枚を積み上げ、その整流板１枚を積み上げる毎に両側の壁
の打込型枠（プレキャストコンクリート製）を立て込むことになる。さらに、両側の壁及
び天井のコンクリートを打設した後で整流板の間に設置している支保工を取り外す必要が
あり、貯蔵建屋の空調ダクト整流板スリット部を構築に手間と長い工期を要することにな
っていた。 In this way, even when using precast concrete 16, which is a ready-made concrete product, each sheet of rectifying plates is piled up locally, and each time the rectifying plates are piled up, the formwork on the walls on both sides (precast (Made of concrete). In addition, it is necessary to remove the support installed between the rectifying plates after placing the concrete on the walls and ceiling on both sides, and it takes time and labor to build the air conditioning duct rectifying plate slit part of the storage building It was.

さらに、空調ダクトの水平方向の部分にこの整流板スリット部が配置されている場合は従
来の工法で施工可能であるが、整流板スリット部は空調ダクトが垂直方向の部分に配置さ
れる場合は施工不可能である。 Furthermore, when this rectifying plate slit part is arranged in the horizontal part of the air conditioning duct, it can be constructed by the conventional method, but the rectifying plate slit part is used when the air conditioning duct is arranged in the vertical part. Construction is impossible.

本発明は、上述した課題を解決するために、空調ダクト整流板現地工事の簡素化、工期短
縮を目的とする。 In order to solve the above-described problems, an object of the present invention is to simplify the on-site construction of an air conditioning duct rectifying plate and shorten the construction period.

本発明に係る整流板スリットブロックは、放射性物質建屋の床が構築された後に搭載され、空気流れに対してその左右両面及び上面をコンクリートによって打設された空調ダクトの流路に形成される整流板スリットブロックであって、前記空調ダクトの流路に対して棚状に複数段設けられた整流板と、前記空調ダクトの流路の内側における左右両面及び上面に設けられた第１の鋼板と、前記空調ダクトの流路の前記第１の鋼板の外側に設けられた補強材と、前記第１の鋼板、前記補強材及び前記コンクリートを定着するスタッドと、を有し、前記整流板、前記第１の鋼板、前記補強材及び前記スタッドが一体で構成されたブロックであり、かつ、放射性物質建屋の床が構築された後にそのブロックの外側に前記コンクリートを打設して前記空調ダクトの流路と合わせて形成されることを特徴とする。 The rectifying plate slit block according to the present invention is mounted after the building of the radioactive material building is constructed, and the rectification formed in the flow path of the air-conditioning duct in which the left and right surfaces and the upper surface are cast with concrete against the air flow. A plate slit block, a rectifying plate provided in a plurality of stages in a shelf shape with respect to the flow path of the air conditioning duct, and a first steel plate provided on both the left and right surfaces and the upper surface inside the flow path of the air conditioning duct; A stiffener provided outside the first steel plate in the flow path of the air conditioning duct, and a stud for fixing the first steel plate, the stiffener and the concrete, and the rectifying plate, A block in which the first steel plate, the reinforcing material, and the stud are integrally formed, and after the floor of the radioactive material building is constructed, the concrete is placed outside the block and the empty space is formed. Characterized in that it is formed together with the duct flow path.

本発明に係る整流板スリットブロックによれば、空調ダクト整流板の現地工事の簡素化、工程短縮を図ることができる。 According to the rectifying plate slit block according to the present invention, simplification of the local construction of the air conditioning duct rectifying plate and shortening of the process can be achieved .

本発明に係る整流板スリットブロックの実施形態について、図１、図２を参照して説明する。 An embodiment of a rectifying plate slit block according to the present invention will be described with reference to FIGS. 1 and 2.

図１は、本発明に係る放射性物質貯蔵建屋の実施の形態の断面図である。図２は、本発明
に係る空調ダクト整流板スリットの実施の形態の断面図である。 FIG. 1 is a cross-sectional view of an embodiment of a radioactive substance storage building according to the present invention. FIG. 2 is a cross-sectional view of an embodiment of an air conditioning duct rectifying plate slit according to the present invention.

貯蔵建屋１の空調ダクト２部分に整流板スリット部３が設置されている。整流板スリット
部３は、複数の整流板４で構成され、鋼製により工場製作される。両側の壁５の整流板４
側及び天井６の下面が鋼板７で覆われる。鋼板７は、壁５及び天井６の躯体を構築するた
めの型枠の役割も果たしている。整流板スリット部３、壁５の整流板４側及び天井６下面
を鋼製化することで、ブロック化が可能となる。 A rectifying plate slit portion 3 is installed in the air conditioning duct 2 portion of the storage building 1. The rectifying plate slit portion 3 is composed of a plurality of rectifying plates 4 and is manufactured by a factory made of steel. Rectifying plate 4 on both walls 5
The side and the lower surface of the ceiling 6 are covered with a steel plate 7. The steel plate 7 also plays a role of a formwork for constructing a casing of the wall 5 and the ceiling 6. By making the rectifying plate slit 3, the rectifying plate 4 side of the wall 5 and the lower surface of the ceiling 6 into steel, it is possible to make a block.

コンクリート８（天井６を含む）と鋼板７の定着を図るため、鋼板７には定ピッチでスタッド９を配置する。鋼板７には補強材１０を取り付ける。補強材１０は、ブロック化するために形状を保持する目的で取り付けられるものと、型枠の役目を果たす部分のコンクリート打設荷重を負担する目的のために取り付けられるものがある。 In order to fix the concrete 8 (including the ceiling 6) and the steel plate 7, studs 9 are arranged on the steel plate 7 at a constant pitch. A reinforcing material 10 is attached to the steel plate 7. The reinforcing material 10 may be attached for the purpose of retaining the shape for making a block, or may be attached for the purpose of bearing the concrete placing load of the portion serving as a formwork.

空調ダクトの整流板スリット部３を鋼製化し工場で製作してブロック化して整流板スリッ
トブロック１１とするにより、床１２が構築された後、整流板スリットブロック１１を搭
載し、両側の壁５及び天井６を構築するだけの手順となる。 The rectifying plate slit block 3 of the air conditioning duct is made of steel and manufactured at a factory and is blocked to form the rectifying plate slit block 11. After the floor 12 is constructed, the rectifying plate slit block 11 is mounted and the walls 5 on both sides are mounted. And the procedure is simply to construct the ceiling 6.

尚、整流板スリットブロック１１は、床１２が完成した後、両側の壁５を構築する際、現
地工事はコンクリート８を打設するだけとするために、壁５の整流板４側の鋼板７に対し
その反対側も鋼板とし、サンドイッチ状に製作し、さらに大きなブロックとしてもよい。 Note that the rectifying plate slit block 11 has a steel plate 7 on the rectifying plate 4 side of the wall 5 in order to construct concrete 8 only when constructing the walls 5 on both sides after the floor 12 is completed. On the other hand, the opposite side may be a steel plate, manufactured in a sandwich shape, and made into a larger block.

図３は、本発明に係る空調ダクト整流板スリットの実施の形態の形状を表す図である。 FIG. 3 is a diagram showing the shape of the embodiment of the air-conditioning duct rectifying plate slit according to the present invention.

整流板４は遮蔽性能を要求されることから、コンクリートなどの遮蔽材を充填する必要が
ある。これに対応するため、図３に示すように整流板スリットブロック１１の整流板４は
、たんすの引き出しのような棚状の形状とし、コンクリートを上から流し込む。この整流
板スリットブロック１１には、コンクリート打設荷重受けの補強材１０とコンクリート定
着のためのスタッド９を配置する。 Since the current plate 4 is required to have a shielding performance, it is necessary to fill a shielding material such as concrete. In order to cope with this, as shown in FIG. 3, the rectifying plate 4 of the rectifying plate slit block 11 has a shelf-like shape like a drawer of the chest, and the concrete is poured from above. In this rectifying plate slit block 11, a reinforcing material 10 for receiving a concrete casting load and a stud 9 for fixing concrete are arranged.

コンクリートを流し込むタイミングは、整流板スリットブロック11を現地に搭載した後コ
ンクリートを流すことも考えられるが、工期短縮を図るため、ヤードで整流板４に予めコ
ンクリートを流し込み、その後整流板スリットブロック11を現地に搭載してもよい。 The timing of pouring the concrete may be to flow the concrete after the current plate slit block 11 is installed on site, but in order to shorten the construction period, the concrete is previously poured into the current plate 4 at the yard, and then the current plate slit block 11 is installed. It may be installed locally.

整流板４間の間は狭いことから、整流板スリットブロック１１を構築した後は補修するこ
とが不可能である。従って、整流板スリットブロック部はメンテナンスフリーであること
が要求される。 Since the space between the current plates 4 is narrow, it is impossible to repair after the current plate slit block 11 is constructed. Therefore, the current plate slit block portion is required to be maintenance-free.

整流板スリット部を鋼製化した場合、一般的には塗装で腐食などに対処することが考えら
れるが、塗装は劣化しはげたりするので、40年程度の設備供用期間を対象とした場合、塗
装メンテナンスが必要となる。 When the rectifying plate slit is made of steel, it is generally considered to deal with corrosion etc. by painting, but the coating deteriorates, so if the equipment service period of about 40 years is targeted, Painting maintenance is required.

よって、整流板部分の材質を工夫する必要があるが、その工夫の一つとして、整流板４だ
け腐食に強いステンレス鋼を採用したり、アルミ製のものを採用したりすることがあげら
れる。 Therefore, it is necessary to devise the material of the rectifying plate portion. As one of the contrivances, for example, the rectifying plate 4 may be made of stainless steel that is resistant to corrosion or may be made of aluminum.

整流板４の構造にある程度の強度が要求される場合は、整流板４をクラッド鋼や亜鉛めっ
きなど腐食に強い表面処理を施すようにしてもよい。 When a certain level of strength is required for the structure of the rectifying plate 4, the rectifying plate 4 may be subjected to a surface treatment resistant to corrosion such as clad steel or galvanizing.

また、整流板４は空気の流路となるので、できるだけ摩擦抵抗は低減したいことから、摩
擦抵抗の少ない鋼材の採用または表面処理を施すようにしてもよい。 In addition, since the rectifying plate 4 serves as an air flow path, it is desired to reduce the frictional resistance as much as possible. Therefore, a steel material having a low frictional resistance or a surface treatment may be applied.

なお、従来のプレキャストコンクリート１６は、メンテナンスフリーと摩擦抵抗低減の表
面処理要求を満たすことから、整流板スリットブロック１１のうち整流板４の少なくとも
一部をプレキャストコンクリート１６としてもよい。 In addition, since the conventional precast concrete 16 satisfies the surface treatment requirement of maintenance-free and frictional resistance reduction, it is good also considering at least one part of the baffle plate 4 among the baffle plate slit blocks 11 as the precast concrete 16. FIG.

以上より、貯蔵建屋の空調ダクト整流板スリット部３に鋼板コンクリート構造の技術を活
かし、鋼製の整流板スリットブロック１１を採用することにより、その部分を工場で製作
し、ブロック工法で現地搭載してからコンクリートを打設する施工手順とすることが可能
となることから、従来施工で煩雑となっていた整流板の現地工事での詳細な現地調整が不
要となり、従来煩雑となっていた手順と工程を要していた整流板スリット部３の構築が単
純かつ迅速に実施することができる。 From the above, utilizing the technology of steel plate concrete structure in the air conditioning duct rectifying plate slit part 3 of the storage building and adopting the steel rectifying plate slit block 11, the part is manufactured in the factory and installed on site by the block method. Since it is possible to use a construction procedure for placing concrete afterwards, detailed on-site adjustment of the rectifying plate, which has been complicated by conventional construction, is no longer necessary. Construction of the rectifying plate slit portion 3 requiring a process can be performed simply and quickly.

また、整流板スリット部３のブロック化により、周辺躯体部構築との平行作業による工期
短縮が図られる。 In addition, due to the blocking of the rectifying plate slit portion 3, the work period can be shortened by parallel work with the peripheral housing construction.

さらに、ヤードでの整流板スリット部３の構築も可能であり、整流板４をヤードで構築す
ることで、作業スペースの確保による品質向上、作業安全性の確保が図れ、更なる現地工
事削減と工期短縮を図ることができる。 In addition, the rectifying plate slit part 3 can be constructed in the yard, and by constructing the rectifying plate 4 in the yard, quality can be improved and work safety can be ensured by securing the work space, and further on-site construction can be reduced. The construction period can be shortened.

さらには、整流板部分の材質を腐食に強いステンレス鋼や、アルミ製のものを採用するこ
とにより、メンテナンスフリーで品質の良い整流板スリット部３の構造とすることができ
る。 Furthermore, the structure of the rectifying plate slit portion 3 can be made maintenance-free and of good quality by adopting stainless steel or aluminum that is resistant to corrosion as the material of the rectifying plate portion.

本発明の実施形態に係る放射性物質貯蔵建屋の実施の形態の断面図。Sectional drawing of embodiment of the radioactive substance storage building which concerns on embodiment of this invention. 本発明の実施形態に係る空調ダクト整流板スリットの断面図。Sectional drawing of the air-conditioning duct baffle plate slit which concerns on embodiment of this invention. 本発明の実施形態に係る空調ダクト整流板スリットの形状を示す図。The figure which shows the shape of the air-conditioning duct baffle plate slit which concerns on embodiment of this invention. 従来の空調ダクト整流板スリットの断面図。Sectional drawing of the conventional air-conditioning duct baffle plate slit.

符号の説明Explanation of symbols

１ 貯蔵建屋
２ 空調ダクト
３ 整流板スリット部
４ 整流板
５ 壁
６ 天井
７ 鋼板
８ コンクリート
９ スタッド
１０ 補強材
１１ 整流板スリットブロック
１２ 床
１３ 空気取入れ口
１４ 排気口
１５ 収納管
１６ プレキャストコンクリート
１７ 支保工 DESCRIPTION OF SYMBOLS 1 Storage building 2 Air conditioning duct 3 Current plate slit part 4 Current plate 5 Wall 6 Ceiling 7 Steel plate 8 Concrete 9 Stud 10 Reinforcement material 11 Current plate slit block 12 Floor 13 Air intake 14 Exhaust 15 Storage pipe 16 Precast concrete 17 Support

Claims (4)

放射性物質建屋の床が構築された後に搭載され、空気流れに対してその左右両面及び上面をコンクリートによって打設された空調ダクトの流路に形成される整流板スリットブロックであって、A rectifying plate slit block which is mounted after the construction of the radioactive material building floor and is formed in the flow path of the air-conditioning duct which is placed with concrete on the left and right sides and the upper surface with respect to the air flow,
前記空調ダクトの流路に対して棚状に複数段設けられた整流板と、A rectifying plate provided in a plurality of stages in a shelf shape with respect to the flow path of the air conditioning duct;
前記空調ダクトの流路の内側における左右両面及び上面に設けられた第１の鋼板と、A first steel plate provided on both the left and right surfaces and the upper surface inside the flow path of the air conditioning duct;
前記空調ダクトの流路の前記第１の鋼板の外側に設けられた補強材と、A reinforcing member provided outside the first steel plate in the flow path of the air conditioning duct;
前記第１の鋼板、前記補強材及び前記コンクリートを定着するスタッドと、A stud for fixing the first steel plate, the reinforcing material and the concrete;
を有し、Have
前記整流板、前記第１の鋼板、前記補強材及び前記スタッドが一体で構成されたブロックであり、かつ、放射性物質建屋の床が構築された後にそのブロックの外側に前記コンクリートを打設して前記空調ダクトの流路と合わせて形成されることを特徴とする整流板スリットブロック。The rectifying plate, the first steel plate, the reinforcing material, and the stud are integrally formed blocks, and after the building of the radioactive material building is constructed, the concrete is placed outside the block. A rectifying plate slit block, which is formed together with a flow path of the air conditioning duct. 前記整流板の材質を腐食に強い材質としたことを特徴とする請求項１記載の空調ダクト整流板スリット。   The air conditioning duct rectifying plate slit according to claim 1, wherein the rectifying plate is made of a material resistant to corrosion. 前記整流板の表面に腐食に強い表面処理を施すことを特徴とする請求項１記載の空調ダクト整流板スリット。   The air conditioning duct rectifying plate slit according to claim 1, wherein a surface treatment resistant to corrosion is applied to a surface of the rectifying plate. 前記空調ダクトの流路の外側における左右両面に設けられた第２の鋼板を更に有し、前記整流板、前記第１の鋼板、前記補強材、前記スタッド及び前記第２の鋼板が一体で構成されたブロックであり、かつ、放射性物質建屋の床が構築された後に前記第１の鋼板と前記第２の鋼板との間に前記コンクリートを打設して前記空調ダクトの流路と合わせて形成されることを特徴とする請求項１記載の空調ダクト整流板スリット。 It further has 2nd steel plates provided in both the right and left sides outside the flow path of the air-conditioning duct, and the rectifying plate, the first steel plate, the reinforcing material, the stud, and the second steel plate are integrally formed. After the building of the radioactive material building is constructed, the concrete is placed between the first steel plate and the second steel plate, and is formed in accordance with the flow path of the air conditioning duct. The air conditioning duct rectifying plate slit according to claim 1, wherein
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