JP6324258B2 - Lattice part restraining mechanism, lattice part restraining method, and fuel holder - Google Patents

Lattice part restraining mechanism, lattice part restraining method, and fuel holder Download PDF

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JP6324258B2
JP6324258B2 JP2014164988A JP2014164988A JP6324258B2 JP 6324258 B2 JP6324258 B2 JP 6324258B2 JP 2014164988 A JP2014164988 A JP 2014164988A JP 2014164988 A JP2014164988 A JP 2014164988A JP 6324258 B2 JP6324258 B2 JP 6324258B2
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tie plate
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upper tie
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lattice
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啓朗 早川
啓朗 早川
優二 岩本
優二 岩本
喜彦 田口
喜彦 田口
智章 樋ケ
智章 樋ケ
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株式会社グローバル・ニュークリア・フュエル・ジャパン
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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、格子部拘束機構、格子部拘束方法およびこれを用いた燃料ホルダに関する。   The present invention relates to a lattice part restraining mechanism, a lattice part restraining method, and a fuel holder using the same.

沸騰水型原子炉や加圧水型原子炉等に用いられる原子炉用の燃料、特に混合酸化物燃料の新燃料を燃料加工工場から原子力発電所に輸送する際は、組み立てられた燃料体を燃料ホルダ内に収納して燃料体を保護する。燃料体を収納した燃料ホルダは、燃料輸送容器に収納されて輸送される。このように燃料ホルダは、燃料体の輸送のために用いられる。   When transporting fuel for nuclear reactors used in boiling water reactors, pressurized water reactors, etc., especially new mixed oxide fuels from fuel processing plants to nuclear power plants, the assembled fuel assembly is used as a fuel holder. It is housed inside to protect the fuel body. The fuel holder storing the fuel body is stored in a fuel transport container and transported. Thus, the fuel holder is used for transportation of the fuel body.

図１４は、一般的な沸騰水型原子炉用の燃料体の側面図である。図１４に示すように、沸騰水型原子炉用の燃料体１０は、複数本の燃料棒１１が８×８、９×９などの正方格子状に配列されている。また、横断面の中央部には燃料棒１１に代わって１本のウォータロッド１２が設けられている。なお、ウォータロッド１２は複数本でもよい。燃料棒１１およびウォータロッド１２のそれぞれの上端部は上部タイプレート１３に、それぞれの下端部は下部タイプレート１５により支持されている。また、上部タイプレート１３と下部タイプレート１５の間の領域は、長手方向に適度な間隔をおいて配置される７個から８個程度の複数個の燃料スペーサ１４により支持されている。 FIG. 14 is a side view of a fuel body for a general boiling water reactor. As shown in FIG. 14, the fuel body 10 for a boiling water reactor has a plurality of fuel rods 11 arranged in a square lattice such as 8 × 8, 9 × 9. In addition, a single water rod 12 is provided in place of the fuel rod 11 at the center of the cross section. A plurality of water rods 12 may be used. The upper end portions of the fuel rod 11 and the water rod 12 are supported by the upper tie plate 13, and the lower end portions thereof are supported by the lower tie plate 15. In addition, the region between the upper tie plate 13 and the lower tie plate 15 is supported by a plurality of about 7 to 8 fuel spacers 14 arranged at appropriate intervals in the longitudinal direction .

図１５は、従来の燃料ホルダの例を示す縦断面図、図１６は、図１５のＸＶＩ−ＸＶＩ線矢視横断面図である。燃料ホルダ内には、第１の印加側平板部２１ａ、第２の印加側平板部２１ｂ、第１の受け側平板部２１ｃおよび第２の受け側平板部２１ｄの合計４つの壁面により正方形断面の筒状の燃料体１０の収納領域が形成されている。従来の燃料ホルダでは、下部タイプレート１５が円錐形のノズル形状になっている領域、すなわち、燃料体１０の下端部で、下部タイプレート押し付け部材５１および下部タイプレート受け側部材５３によって位置決めされている（特許文献１、特許文献２）。燃料体１０の上端部は、上部タイプレート押し付け部材３１、上部タイプレート受け側部材３３および上部タイプレート締め付け部材３２によって固定されている。また、燃料ホルダが水平よりも４５度傾斜した状態で燃料輸送容器に装荷され、輸送される方法が知られている（特許文献１）。   FIG. 15 is a longitudinal sectional view showing an example of a conventional fuel holder, and FIG. 16 is a transverse sectional view taken along line XVI-XVI in FIG. In the fuel holder, a total of four wall surfaces of the first application side flat plate portion 21a, the second application side flat plate portion 21b, the first reception side flat plate portion 21c, and the second reception side flat plate portion 21d have a square cross section. A storage area for the cylindrical fuel body 10 is formed. In the conventional fuel holder, the lower tie plate 15 is positioned by the lower tie plate pressing member 51 and the lower tie plate receiving side member 53 in the conical nozzle-shaped region, that is, the lower end portion of the fuel body 10. (Patent Document 1, Patent Document 2). The upper end portion of the fuel body 10 is fixed by an upper tie plate pressing member 31, an upper tie plate receiving side member 33, and an upper tie plate clamping member 32. In addition, a method is known in which a fuel holder is loaded and transported in a state where the fuel holder is inclined 45 degrees from the horizontal (Patent Document 1).

特許第３１４２４９３号公報Japanese Patent No. 3142493 特許第５５３０４６６号公報Japanese Patent No. 5530466

一般に、現在使用されている沸騰水型原子炉の燃料体１０には、例えば、燃料棒の配列が８×８、９×９、さらには１０×１０とされているものがある。燃料体１０の長手方向の全長は設計間で大きくは変わらないのが一般的であるが、燃料体１０を構成する下部タイプレート１５や上部タイプレート１３の長手方向の寸法が異なる場合がある。これらの燃料棒配列の異なる設計間では、燃料体１０の下端部を起点とした長手方向の位置に関し、上部タイプレート格子部１３ｂの位置が数十ｍｍ程度異なる場合がある。 In general, some of the fuel bodies 10 of boiling water reactors currently in use have, for example, fuel rod arrangements of 8 × 8, 9 × 9, and even 10 × 10. The overall length of the fuel body 10 in the longitudinal direction is generally not greatly changed between designs, but the lower tie plate 15 and the upper tie plate 13 constituting the fuel body 10 may have different longitudinal dimensions. Between the designs with different fuel rod arrangements, the position of the upper tie plate lattice portion 13b may differ by about several tens of millimeters with respect to the longitudinal position starting from the lower end of the fuel body 10.

上部タイプレート格子部１３ｂの側面を固縛する場合、ボルトなどの上部タイプレート締め付け部材３２を挿通するための穴の位置を上部タイプレート格子部１３ｂの位置に合わせるように、燃料ホルダ、上部タイプレート格子部拘束部３０を設計する必要がある。一方、燃料体１０の設計タイプの数に対応するように上部タイプレート締め付け部材３２を挿通するための穴を複数開けようとする場合を考える。この際、必要な押付け力や強度の観点で設定したねじの規格から、互いに隣接する穴どうしの間に十分な肉厚を確保できず、燃料ホルダの壁面に必要なねじ穴を近接して開けられない場合があった。このため、設計タイプごとに燃料ホルダの製造を行う必要があった。   When the side surface of the upper tie plate lattice portion 13b is secured, the fuel holder, the upper type, and the hole for inserting the upper tie plate fastening member 32 such as a bolt are aligned with the position of the upper tie plate lattice portion 13b. It is necessary to design the rate grid part restraining part 30. On the other hand, consider a case where a plurality of holes for inserting the upper tie plate fastening member 32 are to be formed so as to correspond to the number of design types of the fuel body 10. At this time, due to the screw specifications set in terms of the required pressing force and strength, a sufficient thickness cannot be secured between the adjacent holes, and the necessary screw holes are opened close to the wall surface of the fuel holder. There were cases where it was not possible. For this reason, it is necessary to manufacture a fuel holder for each design type.

本発明は、上記の技術的認識に基づいてなされたものであり、簡単な準備のみで、単一の燃料ホルダを用いて複数の設計タイプの燃料体を収納可能とすることを目的とする。   The present invention has been made on the basis of the above technical recognition, and an object thereof is to allow a plurality of design types of fuel bodies to be stored using a single fuel holder with only simple preparation.

上述の目的を達成するため、本実施形態は、正方格子状に配列された複数の燃料棒と、前記燃料棒のそれぞれの上端を固定して断面が正方形状の上部タイプレート格子部を有する上部タイプレートと、前記燃料棒のそれぞれの下端を固定して断面が正方形状の下部タイプレート側面平坦部を有する下部タイプレートと、上部タイプレートと下部タイプレートとの間で長手方向に互いに間隔をあけて設けられ前記燃料棒を前記長手方向に垂直な方向について拘束する複数の燃料スペーサとを具備する新燃料の燃料体を輸送するために該燃料体を収納する燃料ホルダであって、前記燃料体の長手方向に沿って延びて前記燃料体を囲むように印加側平板部と印加側平板部に対向する受け側平板部とを含む４つの平板部を有し前記長手方向に垂直な方向に開閉可能に形成され、横断面が長方形の筒状体と、前記燃料体の下部タイプレートに対して前記長手方向に垂直な方向から押し付け荷重を付加して前記下部タイプレートを長手方向および長手方向に垂直な方向について拘束可能に形成された下部タイプレート拘束部と、前記燃料体の上部タイプレート格子部に対して前記長手方向に垂直な方向から押し付け荷重を付加して前記上部タイプレート格子部を長手方向に垂直な方向について拘束可能に形成された格子部拘束機構と、を備えて、前記格子部拘束機構は、前記上部タイプレート格子部の第１の辺に密着しかつ前記長手方向に延びる上部タイプレート押し付け部材と、前記印加側平板部に形成された前記長手方向に延びた開口に着脱自在に取り付けられ、前記長手方向の中心位置から偏心している位置に厚み方向に貫通孔が形成された上部タイプレート保持部材と、前記貫通孔を通じて前記上部タイプレート押し付け部材を押し付け可能に形成された上部タイプレート締め付け部材と、前記上部タイプレート押し付け部材と前記燃料体を挟んで反対側に設けられて前記上部タイプレート格子部の前記第１の辺の反対側の第２の辺を支持して前記受け側平板部に支持されて付加された荷重を受ける上部タイプレート受け側部材と、を有することを特徴とする。 In order to achieve the above-described object, the present embodiment has an upper portion having a plurality of fuel rods arranged in a square lattice shape and an upper tie plate lattice portion having a square cross section by fixing the upper ends of the fuel rods. A tie plate, a lower tie plate having a flat side portion of a lower tie plate with a square cross section fixed to each of the lower ends of the fuel rods, and a longitudinal interval between the upper tie plate and the lower tie plate. A fuel holder for housing a fuel body for transporting a new fuel body comprising a plurality of fuel spacers which are provided open and constrain the fuel rods in a direction perpendicular to the longitudinal direction, One that extends along the longitudinal direction of the body and surrounds the fuel body and includes four flat plate portions including an application side flat plate portion and a receiving side flat plate portion that faces the application side flat plate portion, and is perpendicular to the longitudinal direction The openable formed, a cylindrical body cross-section rectangular, the longitudinal direction on the lower tie plate in the longitudinal direction and longitudinally by adding pressing load from a direction perpendicular to the lower tie plate of the fuel assembly a lower tie plate restraining section constrained capable formed in the direction perpendicular to the direction, the upper tie plate grid by adding pressing load from a direction perpendicular to the longitudinal direction relative to the upper tie plate grid of the fuel assembly A lattice portion restraining mechanism formed so that the portion can be restrained in a direction perpendicular to the longitudinal direction , the lattice portion restraining mechanism being in close contact with the first side of the upper tie plate lattice portion and the longitudinal direction And an upper tie plate pressing member extending in the longitudinal direction and an opening formed in the application side flat plate portion extending in the longitudinal direction. An upper tie plate holding member having a through hole formed in a thickness direction at an eccentric position, an upper tie plate clamping member formed so that the upper tie plate pressing member can be pressed through the through hole, and the upper tie plate pressing member Provided on the opposite side across the member and the fuel body, and supported by the receiving side flat plate portion, supporting the second side opposite to the first side of the upper tie plate lattice portion. And an upper tie plate receiving side member that receives a load.

また、本実施形態は、正方格子状に配列された複数の燃料棒と、前記燃料棒のそれぞれの上端を固定して断面が正方形状の上部タイプレート格子部を有する上部タイプレートと、前記燃料棒のそれぞれの下端を固定して断面が正方形状の下部タイプレート側面平坦部を有する下部タイプレートと、上部タイプレートと下部タイプレートとの間で長手方向に互いに間隔をあけて設けられ前記燃料棒を前記長手方向に垂直な方向について拘束する複数の燃料スペーサとを具備する新燃料の燃料体の輸送のために、前記燃料体の長手方向に沿って延びて前記燃料体を囲むように印加側平板部および印加側平板部に対向する受け側平板部を含む４つの平板部を有し前記長手方向に垂直な方向に開閉可能に形成され横断面が長方形の筒状体を有する燃料ホルダが収納する前記燃料体の上部タイプレート格子部を拘束する格子部拘束機構であって、前記上部タイプレート格子部の第１の辺に密着しかつ前記長手方向に延びる上部タイプレート押し付け部材と、前記印加側平板部に形成された前記長手方向に延びた開口に着脱自在に取り付けられ、前記長手方向の中心位置から偏心している位置に厚み方向に貫通孔が形成された上部タイプレート保持部材と、前記貫通孔を通じて前記上部タイプレート押し付け部材を押し付け可能に形成された上部タイプレート締め付け部材と、前記上部タイプレート押し付け部材と前記燃料体を挟んで反対側に設けられて前記上部タイプレート格子部の前記第１の辺の反対側の第２の辺を支持して前記受け側平板部に支持されて付加された荷重を受ける上部タイプレート受け側部材と、を有することを特徴とする。   Further, the present embodiment includes a plurality of fuel rods arranged in a square lattice shape, an upper tie plate having an upper tie plate lattice portion having a square cross section by fixing the upper ends of the fuel rods, and the fuel. A lower tie plate having a lower tie plate side flat portion with a square cross section fixed to the lower ends of the rods, and the fuel provided between the upper tie plate and the lower tie plate in the longitudinal direction and spaced apart from each other; For transporting a fuel body of a new fuel comprising a plurality of fuel spacers constraining the rod in a direction perpendicular to the longitudinal direction, the rod is applied so as to extend along the longitudinal direction of the fuel body and surround the fuel body A fuel having four flat plate portions including a receiving flat plate portion and a receiving flat plate portion that are opposed to the application flat plate portion and that can be opened and closed in a direction perpendicular to the longitudinal direction and has a rectangular cross section A lattice portion restraining mechanism for restraining an upper tie plate lattice portion of the fuel body accommodated by a rudder, wherein the upper tie plate pressing member is in close contact with a first side of the upper tie plate lattice portion and extends in the longitudinal direction; An upper tie plate holding member that is detachably attached to the opening extending in the longitudinal direction formed in the application side flat plate portion, and has a through-hole formed in a thickness direction at a position eccentric from the center position in the longitudinal direction. An upper tie plate pressing member formed so as to be able to press the upper tie plate pressing member through the through hole, and the upper tie plate grid provided on the opposite side across the upper tie plate pressing member and the fuel body. An upper tie that supports a second side of the portion opposite to the first side and receives an applied load supported by the receiving side flat plate portion And having a rate receiver member, the.

また、本実施形態は、正方格子状に配列された複数の燃料棒と、上部タイプレートと、下部タイプレートと、複数の燃料スペーサとを有する新燃料の燃料体を長さ方向を水平にして格子部拘束機構を有する燃料ホルダ内に拘束した状態で輸送するために、前記燃料体の長手方向に沿って延びて前記燃料体を囲むように印加側平板部および印加側平板部に対向する受け側平板部を含む４つの平板部を有し前記長手方向に垂直な方向に開閉可能に形成され横断面が長方形の筒状体を有する前記燃料ホルダで前記燃料体の上部タイプレート格子部を拘束する格子部拘束方法であって、前記格子部拘束機構は、前記上部タイプレート格子部の第１の辺に密着しかつ前記長手方向に延びる上部タイプレート押し付け部材と、前記印加側平板部に形成された前記長手方向に延びた開口に着脱自在に取り付けられ、前記長手方向の中心位置から偏心している位置に厚み方向に貫通孔が形成された上部タイプレート保持部材と、前記貫通孔を通じて前記上部タイプレート押し付け部材を押し付け可能に形成された上部タイプレート締め付け部材と、前記上部タイプレート押し付け部材と前記燃料体を挟んで反対側に設けられて前記上部タイプレート格子部の前記第１の辺の反対側の第２の辺を支持して前記受け側平板部に支持されて付加された荷重を受ける上部タイプレート受け側部材と、を有しており、当該格子部拘束方法は、燃料体の長さの確認結果に基づいて、前記上部タイプレート格子部に押し付け荷重を付加する前記格子部拘束機構の上部タイプレート締め付け部材の位置が前記上部タイプレート格子部の位置に合うように、前記格子部拘束機構の上部タイプレート保持部材の取り付け状態を調整するための取り付け状態調整ステップと、前記取り付け状態調整ステップの後に、前記燃料体を前記燃料ホルダ内に収納する収納ステップと、前記収納ステップの後に、前記燃料ホルダの前記格子部拘束機構によって前記燃料体を拘束する拘束ステップと、を有することを特徴とする。   Further, in the present embodiment, a fuel body of a new fuel having a plurality of fuel rods arranged in a square lattice, an upper tie plate, a lower tie plate, and a plurality of fuel spacers is set in a horizontal direction. In order to transport in a restrained state in a fuel holder having a lattice part restraining mechanism, it extends along the longitudinal direction of the fuel body and faces the application side flat plate portion and the application side flat plate portion so as to surround the fuel body. The upper tie plate lattice portion of the fuel body is constrained by the fuel holder having four flat plate portions including side flat plate portions and formed to be openable and closable in a direction perpendicular to the longitudinal direction and having a cylindrical body having a rectangular cross section. The lattice portion restraining mechanism is formed on the upper tie plate pressing member that is in close contact with the first side of the upper tie plate lattice portion and extends in the longitudinal direction, and the application side flat plate portion. Is An upper tie plate holding member that is detachably attached to the opening extending in the longitudinal direction and has a through hole formed in a thickness direction at a position deviated from the center position in the longitudinal direction, and the upper tie plate through the through hole. An upper tie plate clamping member formed to be able to press the pressing member; and an opposite side of the first side of the upper tie plate lattice portion provided on the opposite side across the upper tie plate pressing member and the fuel body An upper tie plate receiving side member that supports the second side of the receiving side and receives an applied load supported by the receiving side flat plate part. The position of the upper tie plate clamping member of the lattice portion restraining mechanism that applies a pressing load to the upper tie plate lattice portion is determined based on the confirmation result of the upper tie plate. An attachment state adjustment step for adjusting the attachment state of the upper tie plate holding member of the lattice portion restraining mechanism so as to match the position of the rate lattice portion; and after the attachment state adjustment step, the fuel body is attached to the fuel holder. And a restraining step of restraining the fuel body by the lattice restraining mechanism of the fuel holder after the stowing step.

本発明によれば、簡単な準備のみで、単一の燃料ホルダを用いて複数の設計タイプの燃料体を収納可能となる。   According to the present invention, it is possible to store a plurality of design types of fuel bodies using a single fuel holder with only simple preparation.

第１の実施形態に係る燃料ホルダに燃料体を収納した状態の構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows the structure of the state which accommodated the fuel body in the fuel holder which concerns on 1st Embodiment. 図１のＩＩ−ＩＩ線矢視横断面図である。FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1. 第１の実施形態に係る燃料ホルダの格子部拘束機構の拘束対象である上部タイプレートの構造の例を示す正面図である。It is a front view showing an example of the upper tie plate of the structure is a restraint target grid restraining mechanism of the fuel holder according to the first embodiment. 図３の平面図である。FIG. 4 is a plan view of FIG. 3. 第１の実施形態に係る燃料ホルダの格子部拘束機構の構成を示す格子部拘束機構の取り付け面を外面から見た図である。It is the figure which looked at the attachment surface of the lattice part restraint mechanism which shows the structure of the lattice part restraint mechanism of the fuel holder which concerns on 1st Embodiment from the outer surface. 図５のＶＩ−ＶＩ線矢視縦断面図である。FIG. 6 is a longitudinal sectional view taken along line VI-VI in FIG. 5. 第１の実施形態に係る燃料ホルダの格子部拘束機構の別タイプの燃料を拘束する場合の構成を示す格子部拘束機構の取り付け面を外面から見た図である。It is the figure which looked at the attachment surface of the lattice part restraint mechanism which shows the structure in the case of restraining another type of fuel of the lattice part restraint mechanism of the fuel holder which concerns on 1st Embodiment from the outer surface. 図７のＶＩＩＩ−ＶＩＩＩ線矢視縦断面図である。It is a VIII-VIII line arrow longitudinal cross-sectional view of FIG. 第１の実施形態に係る燃料ホルダの格子部拘束機構の上部タイプレート受け側部材の寸法を説明する縦断面図である。It is a longitudinal cross-sectional view explaining the dimension of the upper tie plate receiving side member of the lattice part restraint mechanism of the fuel holder which concerns on 1st Embodiment. 第１の実施形態に係る燃料ホルダの格子部拘束方法の手順を示すフロー図である。It is a flowchart which shows the procedure of the lattice part restraint method of the fuel holder which concerns on 1st Embodiment. 第２の実施形態に係る燃料ホルダの格子部拘束機構の構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows the structure of the lattice part restraint mechanism of the fuel holder which concerns on 2nd Embodiment. 第２の実施形態に係る燃料ホルダの格子部拘束機構の変形例の構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows the structure of the modification of the lattice part restraint mechanism of the fuel holder which concerns on 2nd Embodiment. 第３の実施形態に係る燃料ホルダの上部タイプレート格子部拘束機構の構成を示す横断面図である。It is a transverse sectional view showing a configuration of a third fuel holder according to the embodiment of the upper tie plate grid restraining mechanism. 一般的な沸騰水型原子炉用の燃料体の側面図である。It is a side view of the fuel body for common boiling water reactors. 従来の燃料ホルダに燃料体を収納した状態の構成の例を示す縦断面図である。It is a longitudinal cross-sectional view which shows the example of the structure of the state which accommodated the fuel body in the conventional fuel holder. 図１５のＸＶＩ−ＸＶＩ線矢視横断面図である。FIG. 16 is a cross-sectional view taken along line XVI-XVI in FIG. 15.

以下、図面を参照して、本発明に係る格子部拘束機構、格子部拘束方法および燃料ホルダについて説明する。ここで、互いに同一または類似の部分には、共通の符号を付して、重複説明は省略する。   Hereinafter, a lattice part restraining mechanism, a lattice part restraining method, and a fuel holder according to the present invention will be described with reference to the drawings. Here, the same or similar parts are denoted by common reference numerals, and redundant description is omitted.

［第１の実施形態］
図１は、第１の実施形態に係る燃料ホルダ２０に燃料体１０を収納した状態の構成を示す縦断面図である。また、図２は、図１のＩＩ−ＩＩ線矢視横断面図である。燃料体１０は、たとえば図１４に示すものであり、図示しない原子炉の炉心内では、図１の左方向を上側にして配される。また、後述するように燃料体１０を燃料ホルダ２０に収納する際にも、燃料体１０および燃料ホルダ２０は図１の左側を上側にして取り扱われる。また、燃料体１０を収納して拘束した状態の燃料ホルダ２０を図示しない燃料輸送容器に収納する際も同様である。 [First Embodiment]
FIG. 1 is a longitudinal sectional view showing a configuration in a state in which a fuel body 10 is housed in a fuel holder 20 according to the first embodiment. 2 is a cross-sectional view taken along line II-II in FIG. The fuel body 10 is, for example, as shown in FIG. 14, and is arranged with the left direction of FIG. As will be described later, when the fuel body 10 is stored in the fuel holder 20, the fuel body 10 and the fuel holder 20 are handled with the left side of FIG. The same applies to the case where the fuel holder 20 in a state where the fuel body 10 is stored and restrained is stored in a fuel transport container (not shown).

燃料ホルダ２０を燃料輸送容器に収納した後は、燃料輸送容器は横倒しにされ輸送される。輸送先の原子力発電所において燃料体１０が取り出される際は、以上の逆の流れとなる。したがって、図１および図２は、燃料輸送容器内に収納されて輸送されている際の姿勢を示している。なお、図１は、図２におけるＩ−Ｉ矢視の断面図である。   After the fuel holder 20 is stored in the fuel transport container, the fuel transport container is laid down and transported. When the fuel body 10 is taken out at the nuclear power plant at the transport destination, the reverse flow is performed. Therefore, FIG. 1 and FIG. 2 show the postures when being stored and transported in the fuel transport container. 1 is a cross-sectional view taken along arrows II in FIG.

燃料ホルダ２０は、外枠を構成する筒状体２１と上蓋２２および底板２３、上部タイプレート１３を拘束する格子部拘束機構１００、燃料スペーサ１４を拘束する燃料スペーサ拘束部４０、および下部タイプレート１５を拘束する下部タイプレート拘束部５０を有する。   The fuel holder 20 includes a cylindrical body 21 and an upper lid 22 and a bottom plate 23 that constitute an outer frame, a lattice portion restraining mechanism 100 that restrains the upper tie plate 13, a fuel spacer restraining portion 40 that restrains the fuel spacer 14, and a lower tie plate. The lower tie plate restraint part 50 restrains 15.

筒状体２１は、４つの平板部を有し、横断面が長方形であり、長手方向に延びている。ここで、長手あるいは長手方向とは、以下、収納する燃料体１０の燃料棒１１の長手あるいはその方向、すなわち燃料体１０が炉心に装荷された状態における鉛直方向に対応する方向をいうものとする。また、筒状体２１の断面形状の長方形は正方形を含む。たとえば、筒状体２１を図２のように４５度に傾けている場合は、断面形状は正方形が望ましい。   The cylindrical body 21 has four flat plate portions, has a rectangular cross section, and extends in the longitudinal direction. Here, the longitudinal direction or longitudinal direction means the longitudinal direction or the direction of the fuel rod 11 of the fuel body 10 to be accommodated, that is, the direction corresponding to the vertical direction when the fuel body 10 is loaded on the core. . Moreover, the rectangular shape of the cross-sectional shape of the cylindrical body 21 includes a square. For example, when the cylindrical body 21 is inclined at 45 degrees as shown in FIG. 2, the cross-sectional shape is preferably a square.

４つの平板部のうち、互いに隣接する第１の印加側平板部２１ａと第２の印加側平板部２１ｂが長手側の一辺で互いに垂直に結合し、印加側曲げ板２５を形成している。互いに隣接する第１の受け側平板部２１ｃと第２の受け側平板部２１ｄが長手側の一辺で互いに垂直に結合し、受け側曲げ板２６を形成している。また、第１の印加側平板部２１ａと第１の受け側平板部２１ｃとが互いに対向しており、第２の印加側平板部２１ｂと受け側平板部２１ｄとが互いに対向している。   Among the four flat plate portions, the first application side flat plate portion 21a and the second application side flat plate portion 21b adjacent to each other are vertically coupled to each other at one side of the longitudinal side to form the application side bent plate 25. The first receiving side flat plate portion 21c and the second receiving side flat plate portion 21d which are adjacent to each other are vertically coupled to each other on one side of the longitudinal side to form the receiving side bent plate 26. Further, the first application side flat plate portion 21a and the first receiving side flat plate portion 21c face each other, and the second application side flat plate portion 21b and the reception side flat plate portion 21d face each other.

このように筒状体２１を形成する印加側曲げ板２５と受け側曲げ板２６は、２つの稜線部で結合している。第１の印加側平板部２１ａと受け側平板部２１ｄが結合する稜線部である第１の結合部２１ｆにはヒンジ２１ｇが設けられ、第１の結合部２１ｆは回動可能に形成されている。また、第２の印加側平板部２１ｂと第１の受け側平板部２１ｃが結合する稜線部である第２の結合部２１ｈは接離可能に形成されている。上蓋２２は長方形の板状で、筒状体２１の上端で筒状体２１と着脱可能に結合されている。底板２３は長方形の板状で、筒状体２１の下端で筒状体と結合し、印加側曲げ板２５とは切り離し可能に形成されている。   Thus, the application side bending plate 25 and the receiving side bending plate 26 which form the cylindrical body 21 are coupled together at two ridge lines. A hinge 21g is provided in the first coupling portion 21f, which is a ridge line portion where the first application side flat plate portion 21a and the receiving side flat plate portion 21d are coupled, and the first coupling portion 21f is formed to be rotatable. . Moreover, the 2nd coupling | bond part 21h which is a ridgeline part which the 2nd application side flat plate part 21b and the 1st receiving side flat plate part 21c couple | bond is formed so that contact / separation is possible. The upper lid 22 has a rectangular plate shape and is detachably coupled to the cylindrical body 21 at the upper end of the cylindrical body 21. The bottom plate 23 has a rectangular plate shape and is coupled to the cylindrical body at the lower end of the cylindrical body 21 so as to be separable from the application side bending plate 25.

上部タイプレート１３を拘束する格子部拘束機構１００は、図３で詳細を説明する上部タイプレート格子部１３ｂを長手方向に垂直で外側からの押し付け力を加える部分と、第１の受け側平板部２１ｃおよび第２の受け側平板部２１ｄの内側に設けられ、押し付けられた上部タイプレート格子部１３ｂからの荷重を受ける上部タイプレート受け側部材１０４を有する。押し付け力を加える部分は第１の印加側平板部２１ａおよび第２の印加側平板部２１ｂ側に設けられている。また、上部タイプレート受け側部材１０４は、第１の受け側平板部２１ｃおよび第２の受け側平板部２１ｄの内側に設けられている。   The lattice portion restraining mechanism 100 that restrains the upper tie plate 13 includes a portion that applies a pressing force perpendicular to the longitudinal direction of the upper tie plate lattice portion 13b, which will be described in detail with reference to FIG. 3, and a first receiving side flat plate portion. 21c and an upper tie plate receiving side member 104 that is provided inside the second receiving side flat plate portion 21d and receives a load from the pressed upper tie plate lattice portion 13b. The portions to which the pressing force is applied are provided on the first application side flat plate portion 21a and the second application side flat plate portion 21b side. Further, the upper tie plate receiving side member 104 is provided inside the first receiving side flat plate portion 21c and the second receiving side flat plate portion 21d.

燃料スペーサ拘束部４０は、それぞれの燃料スペーサ１４に対して、長手方向に垂直な外側からの押し付け力を加える燃料スペーサ押し付け部材４１と、押し付け力を加えられた燃料スペーサ１４からの荷重を受ける燃料スペーサ受け側部材４２を有する。燃料スペーサ押し付け部材４１は第１の印加側平板部２１ａおよび第２の印加側平板部２１ｂの内側に設けられる。また、燃料スペーサ受け側部材４２は第１の受け側平板部２１ｃおよび第２の受け側平板部２１ｄの内側に設けられている。燃料スペーサ押し付け部材４１は、たとえば、板バネを有して印加側曲げ板２５と受け側曲げ板２６を閉じたときに板バネが圧縮されることにより圧縮荷重を燃料スペーサ１４に伝達する。   The fuel spacer restraint portion 40 is a fuel spacer pressing member 41 that applies a pressing force from the outside perpendicular to the longitudinal direction to each fuel spacer 14 and a fuel that receives a load from the fuel spacer 14 to which the pressing force is applied. A spacer receiving side member 42 is provided. The fuel spacer pressing member 41 is provided inside the first application side flat plate portion 21a and the second application side flat plate portion 21b. Further, the fuel spacer receiving side member 42 is provided inside the first receiving side flat plate portion 21c and the second receiving side flat plate portion 21d. The fuel spacer pressing member 41 has a leaf spring, for example, and transmits the compression load to the fuel spacer 14 by compressing the leaf spring when the application side bending plate 25 and the receiving side bending plate 26 are closed.

下部タイプレート拘束部５０は、下部タイプレート側面平坦部１５ａに対して、長手方向に垂直な外側からの押し付け力を加える下部タイプレート押し付け部材５１と、第１の印加側平板部２１ａおよび第２の印加側平板部２１ｂにそれぞれ支持されて下部タイプレート押し付け部材５１を下部タイプレート側面平坦部１５ａに押し付ける下部タイプレート締め付け部材５２と、押し付け力を加えられた下部タイプレート側面平坦部１５ａからの荷重を受け下部タイプレート受け側部材５３を有する。下部タイプレート押し付け部材５１は第１の印加側平板部２１ａおよび第２の印加側平板部２１ｂの内側に設けられる。また、下部タイプレート受け側部材５３は第１の受け側平板部２１ｃおよび第２の受け側平板部２１ｄの内側に設けられている。   The lower tie plate restraint portion 50 includes a lower tie plate pressing member 51 that applies a pressing force from the outside perpendicular to the longitudinal direction to the lower tie plate side surface flat portion 15a, the first application side flat plate portion 21a and the second tie plate pressing portion 51a. The lower tie plate pressing member 51 is supported by the application side flat plate portion 21b and presses the lower tie plate pressing member 51 against the lower tie plate side surface flat portion 15a, and the lower tie plate side surface flat portion 15a to which the pressing force is applied. It has a lower tie plate receiving side member 53 that receives a load. The lower tie plate pressing member 51 is provided inside the first application side flat plate portion 21a and the second application side flat plate portion 21b. Further, the lower tie plate receiving side member 53 is provided inside the first receiving side flat plate portion 21c and the second receiving side flat plate portion 21d.

燃料ホルダ２０は、図２に示すように、長手方向を水平にして、第１の印加側平板部２１ａ、第２の印加側平板部２１ｂ、第１の受け側平板部２１ｃおよび第２の受け側平板部２１ｄが平面に対して４５度傾斜するように、かつ印加側曲げ板２５を上、受け側曲げ板２６を下にした状態で、燃料輸送容器に収納される。こうすることによって、燃料体１０の自重が、格子部拘束機構１００、燃料スペーサ拘束部４０、および下部タイプレート拘束部５０による燃料体１０への押し付け荷重の伝達を阻害する方向に働かず、有効に拘束ができる。なお、４５度傾斜した場合を例にとって示しているが、これには限定されない。たとえば、傾斜なしで１辺を底面とするような姿勢でもよい。いずれにしても、燃料体１０の自重が燃料体１０への押し付け荷重の伝達を阻害する方向に働かない方向であればよい。   As shown in FIG. 2, the fuel holder 20 has a first application-side flat plate portion 21a, a second application-side flat plate portion 21b, a first receiving-side flat plate portion 21c, and a second receiving plate, with the longitudinal direction being horizontal. The side flat plate portion 21d is accommodated in the fuel transport container with the application side bending plate 25 on the upper side and the receiving side bending plate 26 on the lower side so that the side flat plate portion 21d is inclined 45 degrees with respect to the plane. By doing so, the dead weight of the fuel body 10 does not act in a direction that impedes transmission of the pressing load to the fuel body 10 by the lattice portion restraining mechanism 100, the fuel spacer restraining portion 40, and the lower tie plate restraining portion 50, and is effective. Can be restrained. In addition, although the case where it inclines 45 degree is shown as an example, it is not limited to this. For example, the posture may be such that one side is the bottom without any inclination. In any case, it is sufficient that the weight of the fuel body 10 does not work in a direction that impedes transmission of the pressing load to the fuel body 10.

また、押し付け力を加える部分が第１の印加側平板部２１ａおよび第２の印加側平板部２１ｂ側に、また、上部タイプレート受け側部材１０４は、第１の受け側平板部２１ｃおよび第２の受け側平板部２１ｄの内側に設けられている場合を示しているが、これには限定されない。すなわち、拘束力が確保されていれば、押し付け力を加える部分が第１の印加側平板部２１ａあるいは第２の印加側平板部２１ｂのいずれか側に設けられ、これに対向する位置、すなわち第１の受け側平板部２１ｃおよび第２の受け側平板部２１ｄのいずれかの面の内側に上部タイプレート受け側部材１０４が設けられている場合でもよい。   Further, the portion to which the pressing force is applied is on the first application side flat plate portion 21a and the second application side flat plate portion 21b side, and the upper tie plate receiving side member 104 is the first receiving side flat plate portion 21c and the second application side flat plate portion 21c. Although the case where it is provided inside the receiving side flat plate portion 21d is shown, it is not limited to this. That is, if a restraining force is secured, a portion to which a pressing force is applied is provided on either side of the first application side flat plate portion 21a or the second application side flat plate portion 21b, and a position facing this, that is, the first The upper tie plate receiving side member 104 may be provided on the inner side of any one of the first receiving side flat plate portion 21c and the second receiving side flat plate portion 21d.

図３は、本実施形態に係る燃料ホルダの格子部拘束機構の拘束対象である上部タイプレートの構造の例を示す正面図である。また、図４は、図３の平面図である。上部タイプレート１３は、燃料体１０の取り扱い時の揚重機のフック等と取り合うハンドル部１３ａと、燃料棒１１（図１４）の上端部を拘束する上部タイプレート格子部１３ｂを有する。図４に示すように、上部タイプレート格子部１３ｂの断面は、正方形に包絡される形状である。また、上部タイプレート格子部１３ｂの側面は、完全な平面ではなく、１つの辺あたり２か所に凸部を有する形状である。 Figure 3 is a front view showing an example of the upper tie plate of the structure is a restraint target grid restraining mechanism of the fuel holder according to the present embodiment. FIG. 4 is a plan view of FIG. The upper tie plate 13 has a handle portion 13a that engages with a hoist or the like of a lifting machine when handling the fuel body 10, and an upper tie plate lattice portion 13b that restrains the upper end portion of the fuel rod 11 (FIG. 14). As shown in FIG. 4, the cross section of the upper tie plate lattice portion 13b has a shape enveloped by a square. Further, the side surface of the upper tie plate lattice portion 13b is not a complete plane, but has a shape having convex portions at two locations per side.

したがって、上部タイプレート格子部１３ｂの側面に上部タイプレート押し付け部材１０１を密着させると上部タイプレート格子部１３ｂとは２か所で接触する。この状態で、中央部に押し付け荷重Ｆを印加すれば、荷重は、均等に上部タイプレート格子部１３ｂに伝達される。また、上部タイプレート格子部１３ｂから上部タイプレート受け側部材１０４へも接触するする２か所を介して荷重が伝達され、伝達された荷重は、上部タイプレート受け側部材１０４から第１の受け側平板部２１ｃへ接触面で分散して伝達される。   Therefore, when the upper tie plate pressing member 101 is brought into close contact with the side surface of the upper tie plate lattice portion 13b, it comes into contact with the upper tie plate lattice portion 13b at two places. In this state, if a pressing load F is applied to the central portion, the load is evenly transmitted to the upper tie plate lattice portion 13b. In addition, a load is transmitted from the upper tie plate receiving portion 104 to the upper tie plate receiving side member 104 through two places that come into contact with the upper tie plate receiving side member 104. It is distributed and transmitted to the side flat plate portion 21c at the contact surface.

図５は、第１の実施形態に係る燃料ホルダの格子部拘束機構の構成を示す格子部拘束機構の取り付け面を外面から見た図である。また、図６は、図５のＶＩ−ＶＩ線矢視縦断面図である。なお、上部タイプレート受け側部材１０４は図９で説明するものとし図６では図示を省略しており、上部タイプレート格子部１３ｂに押し付け力を印加する機構の部分を示している。   FIG. 5 is a view of the attachment surface of the lattice portion restraining mechanism showing the configuration of the lattice portion restraining mechanism of the fuel holder according to the first embodiment, as viewed from the outside. 6 is a longitudinal sectional view taken along the line VI-VI in FIG. The upper tie plate receiving side member 104 is described with reference to FIG. 9 and is not shown in FIG. 6, and shows a portion of a mechanism that applies a pressing force to the upper tie plate lattice portion 13b.

格子部拘束機構１００は、上部タイプレート押し付け部材１０１、上部タイプレート保持部材１０２、上部タイプレート締め付け部材１０３、および上部タイプレート受け側部材１０４（図９）を有する。上部タイプレート押し付け部材１０１は、上部タイプレート格子部１３ｂの側部に接触し、上部タイプレート格子部１３ｂに長手方向に垂直な押し付け荷重を印加する。   The lattice portion restraining mechanism 100 includes an upper tie plate pressing member 101, an upper tie plate holding member 102, an upper tie plate clamping member 103, and an upper tie plate receiving side member 104 (FIG. 9). The upper tie plate pressing member 101 is in contact with the side portion of the upper tie plate lattice portion 13b and applies a pressing load perpendicular to the longitudinal direction to the upper tie plate lattice portion 13b.

上部タイプレート保持部材１０２は、広がり部１０２ａおよび嵌合部１０２ｂを有する。嵌合部１０２ｂは、第１の印加側平板部２１ａおよび第２の印加側平板部２１ｂのそれぞれに厚み方向に貫通するように形成されたトラック形状あるいは長円形の開口部に嵌合する部分であり、第１の印加側平板部２１ａおよび第２の印加側平板部２１ｂとほぼ同等ないしわずかに薄い厚みを有する。広がり部１０２ａは嵌合部１０２ｂの内側の部分であり、かつ嵌合部１０２ｂより平面方向に広がっており、段差部を形成している。この広がっている部分は、第１の印加側平板部２１ａおよび第２の印加側平板部２１ｂの内側の面に接している。   The upper tie plate holding member 102 has a spread part 102a and a fitting part 102b. The fitting portion 102b is a portion that fits into a track-shaped or oval opening formed so as to penetrate each of the first application-side flat plate portion 21a and the second application-side flat plate portion 21b in the thickness direction. The first application side flat plate portion 21a and the second application side flat plate portion 21b have substantially the same or slightly thinner thickness. The spreading part 102a is an inner part of the fitting part 102b and spreads in the plane direction from the fitting part 102b to form a step part. The spreading portion is in contact with the inner surfaces of the first application side flat plate portion 21a and the second application side flat plate portion 21b.

上部タイプレート保持部材１０２には、厚み方向に貫通するねじ孔が形成されている。なお、以下、ねじ孔として説明するが、ねじ孔に限定されない。すなわち、外部から上部タイプレート押し付け部材１０１を押し付ける作用をするジャッキを第１の印加側平板部２１ａなどに取り付けて、押し付け部分が貫通する際の貫通孔であってもよい。   The upper tie plate holding member 102 is formed with a screw hole penetrating in the thickness direction. In addition, although demonstrated as a screw hole hereafter, it is not limited to a screw hole. That is, a through hole may be used when a jack that acts to press the upper tie plate pressing member 101 from the outside is attached to the first application side flat plate portion 21a and the pressing portion passes therethrough.

今、複数の型式の燃料体１０の中で、下部タイプレート拘束部５０によって長手方向が拘束された場合に、下部タイプレート拘束部５０による拘束位置から上部タイプレート格子部１３ｂが最も遠いものの長手方向の上部タイプレート格子部１３ｂと、最も近いものの長手方向の上部タイプレート格子部１３ｂとの位置の差をΔＹとする。 When the longitudinal direction is constrained by the lower tie plate restraint portion 50 among the plurality of types of fuel bodies 10, the longitudinal length of the upper tie plate lattice portion 13 b farthest from the restraining position by the lower tie plate restraint portion 50. The difference in position between the upper tie plate lattice portion 13b in the direction and the upper tie plate lattice portion 13b in the longitudinal direction which is the closest is ΔY.

図５に示すように、上部タイプレート保持部材１０２に形成された実線で示すねじ孔の中心と、上部タイプレート保持部材１０２の向きを長手方向に入れ替えたときの２点鎖線で示すねじ孔の中心との間の距離をΔＹとしている。すなわち、ねじ孔の中心位置は、嵌合部１０２ｂの中心点Ｃから長手方向の長さの差ΔＹの半分すなわちΔＹ／２だけ偏心した位置である。図５、図６は、上部タイプレート格子部１３ｂが下部タイプレート拘束部５０による拘束位置から最も遠い型式の燃料体の場合を示している。   As shown in FIG. 5, the center of the screw hole shown by the solid line formed in the upper tie plate holding member 102 and the screw hole shown by the two-dot chain line when the direction of the upper tie plate holding member 102 is changed in the longitudinal direction. The distance from the center is ΔY. That is, the center position of the screw hole is a position eccentric from the center point C of the fitting portion 102b by half of the longitudinal difference ΔY, that is, ΔY / 2. 5 and 6 show a case where the upper tie plate lattice portion 13b is a type of fuel body farthest from the restraining position by the lower tie plate restraining portion 50. FIG.

ここで、ねじ孔の縁から嵌合部１０２ｂの長手方向の端部までの間隔をΔＺ、段差部における嵌合部１０２ｂの長手方向の端部から広がり部１０２ａの長手方向の端部までの間隔をΔＸ、上部タイプレート格子部１３ｂの厚さをＴとすると、上部タイプレート押し付け部材１０１の長手方向の長さＨ１は、Ｈ１≧Ｔ＋ΔＹ＋２ΔＺの条件を満たすように形成される。なお、縁部を設けない場合は、Ｈ１≧Ｔ＋ΔＹ＋２ΔＸの条件を満たすように形成すればよい。これにより、上部タイプレート押し付け部材１０１の長手方向の長さＨ１は、上部タイプレート格子部１３ｂを包絡する。   Here, the distance from the edge of the screw hole to the end in the longitudinal direction of the fitting portion 102b is ΔZ, and the distance from the end in the longitudinal direction of the fitting portion 102b to the end in the longitudinal direction of the spreading portion 102a in the stepped portion Is ΔX, and the thickness of the upper tie plate lattice portion 13b is T, the length H1 of the upper tie plate pressing member 101 in the longitudinal direction is formed so as to satisfy the condition of H1 ≧ T + ΔY + 2ΔZ. In the case where no edge is provided, it may be formed so as to satisfy the condition of H1 ≧ T + ΔY + 2ΔX. Thereby, the length H1 of the upper tie plate pressing member 101 in the longitudinal direction envelopes the upper tie plate lattice portion 13b.

上部タイプレート締め付け部材１０３は、ねじ孔のめねじに対応したおねじが形成されているたとえばボルトである。上部タイプレート締め付け部材１０３の外側頂部にはたとえば六角穴が形成され、挿入状態で回転による締め付けが可能である。   The upper tie plate fastening member 103 is, for example, a bolt in which a male screw corresponding to the female screw of the screw hole is formed. For example, a hexagonal hole is formed on the outer top portion of the upper tie plate fastening member 103 and can be fastened by rotation in the inserted state.

上部タイプレート締め付け部材１０３の内側頂部は上部タイプレート押し付け部材１０１に接しており、上部タイプレート締め付け部材１０３を回転させることにより上部タイプレート締め付け部材１０３が上部タイプレート押し付け部材１０１側に移動する。これに押されて上部タイプレート押し付け部材１０１が上部タイプレート格子部１３ｂに接した状態で上部タイプレート格子部１３ｂ側に移動する。この結果、上部タイプレート格子部１３ｂに対する押し込み荷重が増大する。   The inner top portion of the upper tie plate clamping member 103 is in contact with the upper tie plate pressing member 101. By rotating the upper tie plate clamping member 103, the upper tie plate clamping member 103 moves to the upper tie plate pressing member 101 side. When pressed by this, the upper tie plate pressing member 101 moves to the upper tie plate lattice portion 13b side in a state of being in contact with the upper tie plate lattice portion 13b. As a result, the pushing load with respect to the upper tie plate lattice portion 13b increases.

図７は、別タイプの燃料を拘束する場合の構成を示す格子部拘束機構の取り付け面を外面から見た図である。また、図８は、図７のＶＩＩＩ−ＶＩＩＩ線矢視縦断面図である。この場合、上部タイプレート保持部材１０２の向きが、長手方向に反対側になっている。すなわち、開口部の中心点Ｃを通る開口面に垂直な軸の周りに１８０度回転した関係となっている。したがって、この場合も、ねじ孔の中心は中心点ＣからΔＹ／２だけ偏心している。また、図７、図８は、上部タイプレート格子部１３ｂが下部タイプレート拘束部５０による拘束位置から最も近い型式の燃料体の場合を示している。   FIG. 7 is a view of the attachment surface of the lattice portion restraining mechanism showing the configuration in the case of restraining another type of fuel, as viewed from the outside. FIG. 8 is a longitudinal sectional view taken along line VIII-VIII in FIG. In this case, the direction of the upper tie plate holding member 102 is opposite to the longitudinal direction. That is, the relationship is rotated by 180 degrees around an axis perpendicular to the opening surface passing through the center point C of the opening. Therefore, also in this case, the center of the screw hole is eccentric from the center point C by ΔY / 2. 7 and 8 show the case where the upper tie plate lattice portion 13b is the closest type of fuel body from the restraint position by the lower tie plate restraint portion 50. FIG.

ここで、燃料ホルダ２０が、２つの型式の燃料体１０を取り扱う場合を示したが、上部タイプレート格子部１３ｂがこれら２種類の型式の燃料体の中間的な位置にある場合には、上部タイプレート保持部材１０２を交換するだけで対応できる。また、４つの型式を取り扱う場合も、同様に、２種類ずつ取り扱う上部タイプレート保持部材１０２を２種類準備すれば対応可能である。すなわち、燃料ホルダ２０が、複数の型式の燃料体１０を取り扱う場合の格子部拘束機構１００の取り付け状態の調整としては、上部タイプレート保持部材１０２の取り付け方向の調整、上部タイプレート保持部材１０２の交換あるいはこれらの組合せなどがある。   Here, the case where the fuel holder 20 handles two types of fuel bodies 10 has been shown. However, when the upper tie plate lattice portion 13b is located at an intermediate position between these two types of fuel bodies, This can be done simply by replacing the tie plate holding member 102. Similarly, when four types are handled, two types of upper tie plate holding members 102 that handle two types each are prepared. That is, the adjustment of the attachment state of the lattice portion restraining mechanism 100 when the fuel holder 20 handles a plurality of types of fuel bodies 10 includes adjustment of the attachment direction of the upper tie plate holding member 102, There are exchanges or combinations thereof.

図９は、上部タイプレート受け側部材１０４の寸法を説明する縦断面図である。上部タイプレート受け側部材１０４の長手方向の長さＨ２は、上部タイプレート格子部１３ｂの厚みＴと、上部タイプレート格子部１３ｂの位置の差ΔＹとの合計値よりも大きい値に設定されている。この結果、上部タイプレート受け側部材１０４は、すべての型式の燃料体１０の上部タイプレート格子部１３ｂからの荷重を受けることができる。   FIG. 9 is a longitudinal sectional view for explaining the dimensions of the upper tie plate receiving side member 104. The length H2 in the longitudinal direction of the upper tie plate receiving side member 104 is set to a value larger than the total value of the thickness T of the upper tie plate lattice portion 13b and the difference ΔY in the position of the upper tie plate lattice portion 13b. Yes. As a result, the upper tie plate receiving side member 104 can receive a load from the upper tie plate lattice portion 13b of the fuel bodies 10 of all types.

図１０は、本実施形態に係る燃料ホルダの格子部拘束方法の手順を示すフロー図である。まず、燃料体１０の長さを確認する（ステップＳ０１）。具体的には、８×８燃料か、９×９燃料かなど、燃料の型式による上部タイプレート格子部１３ｂの位置を確認する。   FIG. 10 is a flowchart showing the procedure of the method for restraining the lattice portion of the fuel holder according to the present embodiment. First, the length of the fuel body 10 is confirmed (step S01). Specifically, the position of the upper tie plate lattice portion 13b according to the type of fuel, such as 8 × 8 fuel or 9 × 9 fuel, is confirmed.

また、燃料ホルダ２０の上蓋２２を取り外し、筒状体２１を開放する（ステップＳ０２）。ここで、筒状体２１の開放は、筒状体２１を形成する印加側曲げ板２５と受け側曲げ板２６を、第１の結合部２１ｆのヒンジ２１ｇを中心に、第２の結合部２１ｈを開放する。このような状態で、燃料ホルダ２０を直立状態に置く。ここで、燃料ホルダ２０は、ステップＳ０２の最初に直立状態としてもよい。あるいは、ステップＳ０２の途中、あるいは最後に直立状態としてもよい。   Further, the upper cover 22 of the fuel holder 20 is removed, and the cylindrical body 21 is opened (step S02). Here, the cylindrical body 21 is opened by applying the application side bending plate 25 and the receiving side bending plate 26 forming the cylindrical body 21 to the second coupling portion 21h with the hinge 21g of the first coupling portion 21f as the center. Is released. In such a state, the fuel holder 20 is placed in an upright state. Here, the fuel holder 20 may be in an upright state at the beginning of step S02. Alternatively, it may be in an upright state during or at the end of step S02.

次に、ステップＳ０１の燃料体１０の長さの確認結果に基づいて、格子部拘束機構１００の取り付け状態の調整を行う（ステップＳ０３）。すなわち、上部タイプレート締め付け部材１０３の位置が上部タイプレート格子部１３ｂの位置に合うように、格子部拘束機構１００の取り付け状態を調整する。具体的には、上部タイプレート保持部材１０２の方向を設定、あるいは上部タイプレート保持部材１０２の交換、あるいはこれらの両者の実施等を行う。 Next, based on the confirmation result of the length of the fuel body 10 in step S01, the attachment state of the lattice portion restraining mechanism 100 is adjusted (step S03). That is, the attachment state of the lattice portion restraining mechanism 100 is adjusted so that the position of the upper tie plate fastening member 103 matches the position of the upper tie plate lattice portion 13b. Specifically, the direction of the upper tie plate holding member 102 is set, the upper tie plate holding member 102 is exchanged, or both of them are performed.

次に、燃料体１０と燃料ホルダ２０を近接させて、燃料体１０を燃料ホルダ２０内に収納する（ステップＳ０４）。燃料体１０は、上部タイプレート１３のハンドル部１３ａで鉛直方向に吊り下げられた状態で燃料ホルダ内に収納される。この際、燃料体１０を移動させても、燃料ホルダ２０を移動させても、あるいは両者を同時に移動させ、互いに近接させてもよい。   Next, the fuel body 10 and the fuel holder 20 are brought close to each other, and the fuel body 10 is stored in the fuel holder 20 (step S04). The fuel body 10 is accommodated in the fuel holder while being suspended in the vertical direction by the handle portion 13a of the upper tie plate 13. At this time, the fuel body 10 may be moved, the fuel holder 20 may be moved, or both may be moved at the same time and brought close to each other.

次に、筒状体２１を閉じて、上蓋２２を取り付ける（ステップＳ０５）。その後に、格子部拘束機構１００により燃料ホルダ２０内に燃料体１０を拘束する（ステップＳ０６）。すなわち、燃料ホルダ２０の格子部拘束機構１００、燃料スペーサ拘束部４０および下部タイプレート拘束部５０のそれぞれにおいて燃料体１０を拘束状態とする。   Next, the cylindrical body 21 is closed and the upper lid 22 is attached (step S05). Thereafter, the fuel body 10 is restrained in the fuel holder 20 by the lattice part restraining mechanism 100 (step S06). That is, the fuel body 10 is brought into a restrained state in each of the lattice portion restraining mechanism 100, the fuel spacer restraining portion 40, and the lower tie plate restraining portion 50 of the fuel holder 20.

すなわち、格子部拘束機構１００においては、上部タイプレート締め付け部材１０３を押し込むことによって上部タイプレート押し付け部材１０１を上部タイプレート格子部１３ｂに押し付ける。   In other words, in the lattice portion restraining mechanism 100, the upper tie plate pressing member 101 is pressed against the upper tie plate lattice portion 13b by pushing in the upper tie plate tightening member 103.

燃料スペーサ拘束部４０においては、筒状体２１を閉じることによってたとえば板バネを有する燃料スペーサ押し付け部材４１により燃料スペーサ１４に押し付け力が印加される。下部タイプレート拘束部５０については、下部タイプレート締め付け部材５２を押し込むことによって下部タイプレート押し付け部材５１を下部タイプレート１５に押し付ける。   In the fuel spacer restraining portion 40, a pressing force is applied to the fuel spacer 14 by closing the cylindrical body 21 by a fuel spacer pressing member 41 having, for example, a leaf spring. With respect to the lower tie plate restraining portion 50, the lower tie plate pressing member 51 is pressed against the lower tie plate 15 by pressing the lower tie plate fastening member 52.

次に、上部タイプレート締め付け部材１０３および下部タイプレート締め付け部材５２の異常の有無を確認する（ステップＳ０７）。たとえば、上部タイプレート締め付け部材１０３の位置が上部タイプレート格子部１３ｂの側部から外れている場合は、上部タイプレート締め付け部材１０３の正常な押し込み代よりさらに押し込まれている可能性がある。同様に、下部タイプレート締め付け部材５２の位置が下部タイプレート１５の側部から外れている場合は、下部タイプレート締め付け部材５２の正常な押し込み代よりさらに押し込まれている可能性がある。したがって、それぞれの押し込み状態をあらかじめ確認した正常な押し込み代と比較することによって異常の有無を確認することができる。   Next, whether or not there is an abnormality in the upper tie plate fastening member 103 and the lower tie plate fastening member 52 is confirmed (step S07). For example, when the position of the upper tie plate fastening member 103 is off the side of the upper tie plate lattice portion 13b, there is a possibility that the upper tie plate fastening member 103 is pushed further than the normal pushing allowance. Similarly, when the position of the lower tie plate fastening member 52 is deviated from the side portion of the lower tie plate 15, there is a possibility that the lower tie plate fastening member 52 is pushed further than the normal pushing allowance. Therefore, the presence or absence of an abnormality can be confirmed by comparing each pushing state with a normal pushing allowance confirmed in advance.

次に、燃料ホルダ２０を燃料輸送容器内に収納する（ステップＳ０８）。その後に、燃料輸送容器を横倒しにして、輸送する（ステップＳ０９）。   Next, the fuel holder 20 is stored in the fuel transport container (step S08). Thereafter, the fuel transport container is laid down and transported (step S09).

以上のように、本実施形態によれば、簡単な準備のみで、単一の燃料ホルダを用いて複数の設計タイプの燃料体を収納することができる。   As described above, according to the present embodiment, it is possible to store a plurality of design types of fuel bodies using a single fuel holder with a simple preparation.

［第２の実施形態］
図１１は、第２の実施形態に係る燃料ホルダの格子部拘束機構の構成を示す縦断面図である。本実施形態は、第１の実施形態の変形であり、複数のロッド状の調整ガイド１１１をさらに有する。調整ガイド１１１は、第１の印加側平板部２１ａの面に垂直に内側に向けて第１の印加側平板部２１ａに埋め込まれている。調整ガイド１１１は、長手方法に垂直な方向については、複数個が互いに間隔をあけて長手方向に同一位置に複数設けられていてもよい。 [Second Embodiment]
FIG. 11 is a longitudinal sectional view showing a configuration of a lattice portion restraining mechanism of the fuel holder according to the second embodiment. This embodiment is a modification of the first embodiment, and further includes a plurality of rod-shaped adjustment guides 111. The adjustment guide 111 is embedded in the first application side flat plate portion 21a so as to face inwardly perpendicular to the surface of the first application side flat plate portion 21a. A plurality of adjustment guides 111 may be provided at the same position in the longitudinal direction at intervals with respect to the direction perpendicular to the longitudinal method.

上部タイプレート押し付け部材１０１の長手方向の両端部近傍にはガイド穴が形成されている。調整ガイド１１１はそれぞれのガイド穴に対応する位置に設けられており、ガイド穴に挿入されている。上部タイプレート押し付け部材１０１は、複数の調整ガイド１１１それぞれについて、各ガイド穴とそれに対応する調整ガイド１１１との相対変位が均一となるように、図示しないばね機構等を介して第１の印加側平板部２１ａに取り付けられている。   Guide holes are formed in the vicinity of both ends in the longitudinal direction of the upper tie plate pressing member 101. The adjustment guide 111 is provided at a position corresponding to each guide hole, and is inserted into the guide hole. The upper tie plate pressing member 101 has a first application side via a spring mechanism (not shown) so that the relative displacement between each guide hole and the corresponding adjustment guide 111 is uniform for each of the plurality of adjustment guides 111. It is attached to the flat plate portion 21a.

図１２は、格子部拘束機構の変形例の構成を示す縦断面図である。上述の上部タイプレート押し付け部材１０１の変位を均一にする方法として、図１２に示すように、上部タイプレート押し付け部材１０１の軸方向の両端に張り出し部１０１ａを設け、それらに対応して、張り出し部１０１ａを支えるようにＬ字の断面形状を有するフック状の調整ガイド１１２を第１の印加側平板部２１ａに設けてもよい。   FIG. 12 is a longitudinal sectional view showing a configuration of a modified example of the lattice portion restraining mechanism. As a method for making the displacement of the upper tie plate pressing member 101 uniform, as shown in FIG. 12, overhang portions 101a are provided at both ends in the axial direction of the upper tie plate pressing member 101, and the overhang portions corresponding to them. A hook-shaped adjustment guide 112 having an L-shaped cross section so as to support 101a may be provided on the first application side flat plate portion 21a.

また、ロッド状の調整ガイド１１１を用いる本第２の実施形態、あるいは、フック状の調整ガイド１１２を用いる変形例の場合のいずれにおいても、上部タイプレート押し付け部材１０１の上部タイプレート格子部１３ｂ側への均等な変位をさらに確実にするために、板バネあるいはコイルばねを用いた機構等をさらに使用してもよい。   Further, in either the second embodiment using the rod-shaped adjustment guide 111 or the modification using the hook-shaped adjustment guide 112, the upper tie plate pressing member 101 on the upper tie plate lattice portion 13b side. In order to further ensure an even displacement, a mechanism using a leaf spring or a coil spring may be further used.

以上、第１の印加側平板部２１ａに取り付けられる格子部拘束機構１００について説明したが、第２の印加側平板部２１ｂに取り付けられる格子部拘束機構１００についても同様である。   The lattice portion restraining mechanism 100 attached to the first application side flat plate portion 21a has been described above, but the same applies to the lattice portion restraining mechanism 100 attached to the second application side flat plate portion 21b.

以上のように構成された本第２の実施形態、あるいはその変形例においては、上部タイプレート締め付け部材１０３によって上部タイプレート押し付け部材１０１を押し込んだ場合に、上部タイプレート押し付け部材１０１は上部タイプレート格子部１３ｂ側に均等に変位する。このため、締め付け時に上部タイプレート押し付け部材１０１が傾くことなく正常に上部タイプレート格子部１３ｂを拘束することができる。   In the second embodiment configured as described above, or a modification thereof, when the upper tie plate pressing member 101 is pushed in by the upper tie plate clamping member 103, the upper tie plate pressing member 101 becomes the upper tie plate. It is displaced evenly toward the lattice part 13b. Therefore, the upper tie plate pressing member 101 can be normally restrained without being tilted when tightening.

［第３の実施形態］
図１３は、第２の実施形態に係る燃料ホルダの上部タイプレート格子部拘束機構の構成を示す縦断面図である。本第３の実施形態は、第１の実施形態の変形である。本実施形態における上部タイプレート押し付け部材１０１ｂおよび上部タイプレート受け側部材１０４ａは、上部タイプレート格子部１３ｂに対向する面に凹部が形成されている。 [Third Embodiment]
FIG. 13 is a longitudinal sectional view showing the configuration of the upper tie plate lattice restraint mechanism of the fuel holder according to the second embodiment. The third embodiment is a modification of the first embodiment. The upper tie plate pressing member 101b and the upper tie plate receiving side member 104a in the present embodiment have recesses formed on the surface facing the upper tie plate lattice portion 13b.

上部タイプレート格子部１３ｂの側面は、平面的な部分に２か所の凸部が形成されている。第１の実施形態における上部タイプレート押し付け部材１０１および上部タイプレート受け側部材１０４は上部タイプレート格子部１３ｂに対向する面は平板状であるためそれぞれ上部タイプレート格子部１３ｂの２か所の凸部で上部タイプレート格子部１３ｂに接触する。本第３の実施形態では、この第１の実施形態では接触する部分に凹部が形成されており、この結果、上部タイプレート押し付け部材１０１ｂおよび上部タイプレート受け側部材１０４ａはそれぞれ、上部タイプレート格子部１３ｂの平面的なたとえば図のように３か所の部分に接触する。なお、図１３には、上部タイプレート押し付け部材１０１ｂおよび上部タイプレート受け側部材１０４ａが、上部タイプレート格子部１３ｂの平面部に接触する場合を図示したが、これらのうちの一部で接触するようにしてもよい。   On the side surface of the upper tie plate lattice portion 13b, two convex portions are formed in a planar portion. Since the upper tie plate pressing member 101 and the upper tie plate receiving side member 104 in the first embodiment have a flat plate-like surface facing the upper tie plate lattice portion 13b, two convex portions of the upper tie plate lattice portion 13b are respectively provided. Contact the upper tie plate lattice portion 13b. In the third embodiment, a concave portion is formed in the contact portion in the first embodiment, and as a result, the upper tie plate pressing member 101b and the upper tie plate receiving side member 104a are respectively provided in the upper tie plate lattice. For example, three portions of the portion 13b are brought into contact with each other as shown in the drawing. Although FIG. 13 illustrates the case where the upper tie plate pressing member 101b and the upper tie plate receiving side member 104a are in contact with the flat portion of the upper tie plate lattice portion 13b, they are in contact with some of them. You may do it.

また、上部タイプレート押し付け部材１０１ｂおよび上部タイプレート受け側部材１０４ａが、上部タイプレート格子部１３ｂの平面部のみならず２か所の凸部にも接触するように、凹部の深さを調整してもよい。   Further, the depth of the concave portion is adjusted so that the upper tie plate pressing member 101b and the upper tie plate receiving side member 104a contact not only the flat portion of the upper tie plate lattice portion 13b but also the two convex portions. May be.

以上のように構成された本実施形態では、上部タイプレート押し付け部材１０１ｂおよび上部タイプレート受け側部材１０４ａがそれぞれ、上部タイプレート格子部１３ｂに接触する部分が増えるため、上部タイプレート格子部１３ｂへの押し付け荷重が分散して伝達される。   In the present embodiment configured as described above, the upper tie plate pressing member 101b and the upper tie plate receiving side member 104a each have more portions in contact with the upper tie plate lattice portion 13b. The pressing load is distributed and transmitted.

［その他の実施形態］
以上、本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。たとえば、各実施形態では、８×８燃料と９×９燃料ではスペーサの位置がほとんど変わらないことから、格子部拘束機構を上部タイプレートの格子部のみに適用した場合を示したが、これに限定されない。 [Other Embodiments]
As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. For example, in each embodiment, since the position of the spacer hardly changes between 8 × 8 fuel and 9 × 9 fuel, the case where the lattice portion restraining mechanism is applied only to the lattice portion of the upper tie plate is shown. It is not limited.

たとえば、１０×１０燃料では燃料スペーサ１４の長手方向の位置が、８×８燃料と９×９燃料などのスペーサの長手方向の位置が異なる。したがって、このような場合は、さらに燃料スペーサ１４にも本発明による格子部拘束機構を適用してもよい。すなわち、燃料スペーサ拘束機構として、燃料スペーサ押し付け部材と、燃料スペーサ保持部材と、燃料スペーサ締め付け部材と、燃料スペーサ受け側部材とを有する構成であってもよい。   For example, in the case of 10 × 10 fuel, the position in the longitudinal direction of the fuel spacer 14 is different from the position in the longitudinal direction of spacers such as 8 × 8 fuel and 9 × 9 fuel. Therefore, in such a case, the lattice restraint mechanism according to the present invention may be applied to the fuel spacer 14. That is, the fuel spacer restraining mechanism may include a fuel spacer pressing member, a fuel spacer holding member, a fuel spacer clamping member, and a fuel spacer receiving side member.

また、各実施形態の特徴を組み合わせてもよい。たとえば、第２の実施形態の特徴である調整ガイド１１１あるいは調整ガイド１１２を設ける形態と、第３の実施形態の特徴である上部タイプレート押し付け部材１０１ｂと上部タイプレート受け側部材１０４ａを有する形態を組み合わせてもよい。   Moreover, you may combine the characteristic of each embodiment. For example, a form in which the adjustment guide 111 or the adjustment guide 112 that is a feature of the second embodiment is provided, and a form that has the upper tie plate pressing member 101b and the upper tie plate receiving side member 104a that are the features of the third embodiment. You may combine.

これらの実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。   These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

１０…燃料体、１１…燃料棒、１２…ウォータロッド、１３…上部タイプレート、１３ａ…ハンドル部、１３ｂ…上部タイプレート格子部、１４…燃料スペーサ、１５…下部タイプレート、１５ａ…下部タイプレート側面平坦部、２０…燃料ホルダ、２１…筒状体、２１ａ…第１の印加側平板部、２１ｂ…第２の印加側平板部、２１ｃ…第１の受け側平板部、２１ｄ…第２の受け側平板部、２１ｆ…第１の結合部、２１ｇ…ヒンジ、２１ｈ…第２の結合部、２２…上蓋、２３…底板、２５…印加側曲げ板、２６…受け側曲げ板、３０…上部タイプレート格子部拘束部、３１…上部タイプレート押し付け部材、３２…上部タイプレート締め付け部材、３３…上部タイプレート受け側部材、４０…燃料スペーサ拘束部、４１…燃料スペーサ押し付け部材、４２…燃料スペーサ受け側部材、５０…下部タイプレート拘束部、５１…下部タイプレート押し付け部材、５２…下部タイプレート締め付け部材、５３…下部タイプレート受け側部材、１００…格子部拘束機構、１０１…上部タイプレート押し付け部材、１０１ａ…張り出し部、１０１ｂ…上部タイプレート押し付け部材、１０２…上部タイプレート保持部材、１０２ａ…広がり部、１０２ｂ…嵌合部、１０３…上部タイプレート締め付け部材、１０４、１０４ａ…上部タイプレート受け側部材、１１１、１１２…調整ガイド   DESCRIPTION OF SYMBOLS 10 ... Fuel body, 11 ... Fuel rod, 12 ... Water rod, 13 ... Upper tie plate, 13a ... Handle part, 13b ... Upper tie plate lattice part, 14 ... Fuel spacer, 15 ... Lower tie plate, 15a ... Lower tie plate Side flat part, 20 ... fuel holder, 21 ... cylindrical body, 21a ... first application side flat plate part, 21b ... second application side flat plate part, 21c ... first receiving side flat plate part, 21d ... second Receiving side flat plate portion, 21f ... first coupling portion, 21g ... hinge, 21h ... second coupling portion, 22 ... top cover, 23 ... bottom plate, 25 ... application side bending plate, 26 ... receiving side bending plate, 30 ... upper portion Tie plate lattice restraint portion, 31 ... Upper tie plate pressing member, 32 ... Upper tie plate clamping member, 33 ... Upper tie plate receiving side member, 40 ... Fuel spacer restraint portion, 41 ... Fuel spacer pressing Members, 42 ... fuel spacer receiving side member, 50 ... lower tie plate restraining part, 51 ... lower tie plate pressing member, 52 ... lower tie plate clamping member, 53 ... lower tie plate receiving side member, 100 ... lattice part restraining mechanism, DESCRIPTION OF SYMBOLS 101 ... Upper tie plate pressing member, 101a ... Overhang | projection part, 101b ... Upper tie plate pressing member, 102 ... Upper tie plate holding member, 102a ... Spreading part, 102b ... Fitting part, 103 ... Upper tie plate clamping member, 104, 104a ... Upper tie plate receiving member, 111, 112 ... Adjustment guide

Claims (8)

正方格子状に配列された複数の燃料棒と、前記燃料棒のそれぞれの上端を固定して断面が正方形状の上部タイプレート格子部を有する上部タイプレートと、前記燃料棒のそれぞれの下端を固定して断面が正方形状の下部タイプレート側面平坦部を有する下部タイプレートと、上部タイプレートと下部タイプレートとの間で長手方向に互いに間隔をあけて設けられ前記燃料棒を前記長手方向に垂直な方向について拘束する複数の燃料スペーサとを具備する新燃料の燃料体を輸送するために該燃料体を収納する燃料ホルダであって、
前記燃料体の長手方向に沿って延びて前記燃料体を囲むように印加側平板部と印加側平板部に対向する受け側平板部とを含む４つの平板部を有し前記長手方向に垂直な方向に開閉可能に形成され、横断面が長方形の筒状体と、
前記燃料体の下部タイプレートに対して前記長手方向に垂直な方向から押し付け荷重を付加して前記下部タイプレートを長手方向および長手方向に垂直な方向について拘束可能に形成された下部タイプレート拘束部と、
前記燃料体の上部タイプレート格子部に対して前記長手方向に垂直な方向から押し付け荷重を付加して前記上部タイプレート格子部を長手方向に垂直な方向について拘束可能に形成された格子部拘束機構と、
を備えて、
前記格子部拘束機構は、
前記上部タイプレート格子部の第１の辺に密着しかつ前記長手方向に延びる上部タイプレート押し付け部材と、
前記印加側平板部に形成された前記長手方向に延びた開口に着脱自在に取り付けられ、前記長手方向の中心位置から偏心している位置に厚み方向に貫通孔が形成された上部タイプレート保持部材と、
前記貫通孔を通じて前記上部タイプレート押し付け部材を押し付け可能に形成された上部タイプレート締め付け部材と、
前記上部タイプレート押し付け部材と前記燃料体を挟んで反対側に設けられて前記上部タイプレート格子部の前記第１の辺の反対側の第２の辺を支持して前記受け側平板部に支持されて付加された荷重を受ける上部タイプレート受け側部材と、
を有することを特徴とする燃料ホルダ。 A plurality of fuel rods arranged in a square lattice shape, an upper tie plate having an upper tie plate lattice portion having a square cross section by fixing the upper ends of the fuel rods, and fixing the lower ends of the fuel rods A lower tie plate having a flat side portion of the lower tie plate having a square cross section, and a space between the upper tie plate and the lower tie plate that are spaced apart from each other in the longitudinal direction, and the fuel rods are perpendicular to the longitudinal direction. A fuel holder for storing a fuel body for transporting a new fuel body comprising a plurality of fuel spacers that are constrained in any direction,
It has four flat plate portions including an application side flat plate portion and a receiving side flat plate portion facing the application side flat plate portion so as to extend along the longitudinal direction of the fuel body and surround the fuel body, and is perpendicular to the longitudinal direction. A cylindrical body having a rectangular cross section formed to be openable and closable in the direction;
A lower tie plate restraining portion formed so as to be able to restrain the lower tie plate in the longitudinal direction and the direction perpendicular to the longitudinal direction by applying a pressing load from a direction perpendicular to the longitudinal direction to the lower tie plate of the fuel body. When,
A lattice portion restraining mechanism formed so as to be able to restrain the upper tie plate lattice portion in a direction perpendicular to the longitudinal direction by applying a pressing load to the upper tie plate lattice portion of the fuel body from a direction perpendicular to the longitudinal direction. When,
With
The lattice portion restraining mechanism is
An upper tie plate pressing member that is in close contact with the first side of the upper tie plate lattice portion and extends in the longitudinal direction;
An upper tie plate holding member that is detachably attached to the longitudinally extending opening formed in the application-side flat plate portion, and has a through-hole formed in a thickness direction at a position deviated from a central position in the longitudinal direction; ,
An upper tie plate clamping member formed to be able to press the upper tie plate pressing member through the through hole;
Provided on the opposite side of the upper tie plate pressing member and the fuel body, and supports the second side opposite to the first side of the upper tie plate lattice portion and is supported on the receiving side flat plate portion. An upper tie plate receiving side member that receives the applied load,
A fuel holder comprising: 前記上部タイプレート保持部材が
前記印加側平板部に形成された前記長手方向に延びた開口に、前記開口の開口面に垂直な軸周りに互いに１８０度回転した関係の２つの状態に着脱自在に取り付けられ、前記長手方向の中心位置から偏心している位置に厚み方向に貫通孔が形成されていることを特徴とする請求項１に記載の燃料ホルダ。 The upper tie plate holding member is detachably attachable to the longitudinally formed opening formed in the application-side flat plate portion in two states rotated 180 degrees around an axis perpendicular to the opening surface of the opening. 2. The fuel holder according to claim 1, wherein a through-hole is formed in a thickness direction at a position attached and decentered from a center position in the longitudinal direction. 前記上部タイプレート押し付け部材の前記長手方向の長さまたは上部タイプレート受け側部材の前記長手方向の長さの少なくとも一方は、前記上部タイプレート格子部の厚みと、前記燃料体の種類による前記長手方向の格子部位置の差異との合計値よりも大きい値に設定されることを特徴とする請求項１に記載の燃料ホルダ。 It said upper tie plate pressing said at least one of the longitudinal length of the longitudinal length or the upper tie plate receiving member of the member, the thickness of the upper tie plate grid portion, said longitudinal due to the type of the fuel assembly 2. The fuel holder according to claim 1, wherein the fuel holder is set to a value larger than a total value with a difference in a lattice portion position in the direction . 前記上部タイプレート保持部材の前記貫通孔の内面にはめねじが形成され、前記上部タイプレート締め付け部材の外面には前記めねじに対応するおねじが形成されていることを特徴とする請求項１ないし請求項３のいずれか一項に記載の燃料ホルダ。   The internal thread of the said through-hole of the said upper tie plate holding member is formed with the internal thread, The external thread of the said upper tie plate clamping member is formed with the external thread corresponding to the said internal thread. The fuel holder as described in any one of thru | or 3 thru | or 3. 前記上部タイプレート保持部材は、前記開口に嵌合する嵌合部と、前記印加側平板部より内側にあって前記開口より広がりの大きな広がり部とを有することを特徴とする請求項１ないし請求項４のいずれか一項に記載の燃料ホルダ。   The said upper tie plate holding member has a fitting part fitted to the said opening, and the expansion part which exists inside the said application side flat plate part and is larger than the said opening. Item 5. The fuel holder according to any one of Items 4. 前記燃料スペーサを前記長手方向に垂直な方向について拘束する燃料スペーサ拘束機構をさらに備え、
前記燃料スペーサ拘束機構は、
前記燃料スペーサの第１の辺に密着しかつ前記長手方向に延びる燃料スペーサ押し付け部材と、
前記印加側平板部に形成された前記長手方向に延びた開口に着脱自在に取り付けられ、前記長手方向の中心位置から偏心している位置に厚み方向に貫通孔が形成された燃料スペーサ保持部材と、
前記貫通孔を通じて前記燃料スペーサ押し付け部材を押し付け可能に形成された燃料スペーサ締め付け部材と、
前記燃料スペーサ押し付け部材と前記燃料体を挟んで反対側に設けられて前記燃料スペーサの前記第１の辺の反対側の第２の辺を支持して前記受け側平板部に支持されて付加された荷重を受ける燃料スペーサ受け側部材と、
を有することを特徴とする請求項１ないし請求項５のいずれか一項に記載の燃料ホルダ。 A fuel spacer restraining mechanism for restraining the fuel spacer in a direction perpendicular to the longitudinal direction;
The fuel spacer restraining mechanism is
A fuel spacer pressing member in close contact with the first side of the fuel spacer and extending in the longitudinal direction;
A fuel spacer holding member which is detachably attached to the opening extending in the longitudinal direction formed in the application side flat plate portion, and has a through hole formed in a thickness direction at a position eccentric from the center position in the longitudinal direction;
A fuel spacer clamping member formed so as to be able to press the fuel spacer pressing member through the through hole;
Provided on the opposite side of the fuel spacer pressing member and the fuel body and supporting the second side opposite to the first side of the fuel spacer and supported by the receiving side flat plate portion. A fuel spacer receiving side member that receives a load,
The fuel holder according to any one of claims 1 to 5, wherein the fuel holder is provided. 正方格子状に配列された複数の燃料棒と、前記燃料棒のそれぞれの上端を固定して断面が正方形状の上部タイプレート格子部を有する上部タイプレートと、前記燃料棒のそれぞれの下端を固定して断面が正方形状の下部タイプレート側面平坦部を有する下部タイプレートと、上部タイプレートと下部タイプレートとの間で長手方向に互いに間隔をあけて設けられ前記燃料棒を前記長手方向に垂直な方向について拘束する複数の燃料スペーサとを具備する新燃料の燃料体の輸送のために、前記燃料体の長手方向に沿って延びて前記燃料体を囲むように印加側平板部および印加側平板部に対向する受け側平板部を含む４つの平板部を有し前記長手方向に垂直な方向に開閉可能に形成され横断面が長方形の筒状体を有する燃料ホルダが収納する前記燃料体の上部タイプレート格子部を拘束する格子部拘束機構であって、
前記上部タイプレート格子部の第１の辺に密着しかつ前記長手方向に延びる上部タイプレート押し付け部材と、
前記印加側平板部に形成された前記長手方向に延びた開口に着脱自在に取り付けられ、前記長手方向の中心位置から偏心している位置に厚み方向に貫通孔が形成された上部タイプレート保持部材と、
前記貫通孔を通じて前記上部タイプレート押し付け部材を押し付け可能に形成された上部タイプレート締め付け部材と、
前記上部タイプレート押し付け部材と前記燃料体を挟んで反対側に設けられて前記上部タイプレート格子部の前記第１の辺の反対側の第２の辺を支持して前記受け側平板部に支持されて付加された荷重を受ける上部タイプレート受け側部材と、
を有することを特徴とする格子部拘束機構。 A plurality of fuel rods arranged in a square lattice shape, an upper tie plate having an upper tie plate lattice portion having a square cross section by fixing the upper ends of the fuel rods, and fixing the lower ends of the fuel rods A lower tie plate having a flat side portion of the lower tie plate having a square cross section, and a space between the upper tie plate and the lower tie plate that are spaced apart from each other in the longitudinal direction, and the fuel rods are perpendicular to the longitudinal direction. An application-side flat plate portion and an application-side flat plate so as to extend along the longitudinal direction of the fuel body and surround the fuel body for transporting the fuel body of a new fuel comprising a plurality of fuel spacers constrained in various directions The fuel holder which has four flat plate portions including a receiving side flat plate portion facing the portion and is formed so as to be openable and closable in a direction perpendicular to the longitudinal direction and having a cylindrical body having a rectangular cross section is housed. A grating restraining mechanism for restraining the upper tie plate grid of the postal body,
An upper tie plate pressing member that is in close contact with the first side of the upper tie plate lattice portion and extends in the longitudinal direction;
An upper tie plate holding member that is detachably attached to the longitudinally extending opening formed in the application-side flat plate portion, and has a through-hole formed in a thickness direction at a position deviated from a central position in the longitudinal direction; ,
An upper tie plate clamping member formed to be able to press the upper tie plate pressing member through the through hole;
Provided on the opposite side of the upper tie plate pressing member and the fuel body, and supports the second side opposite to the first side of the upper tie plate lattice portion and is supported on the receiving side flat plate portion. An upper tie plate receiving side member that receives the applied load,
A lattice portion restraining mechanism characterized by comprising: 正方格子状に配列された複数の燃料棒と、上部タイプレートと、下部タイプレートと、複数の燃料スペーサとを有する新燃料の燃料体を長さ方向を水平にして格子部拘束機構を有する燃料ホルダ内に拘束した状態で輸送するために、前記燃料体の長手方向に沿って延びて前記燃料体を囲むように印加側平板部および印加側平板部に対向する受け側平板部を含む４つの平板部を有し前記長手方向に垂直な方向に開閉可能に形成され横断面が長方形の筒状体を有する前記燃料ホルダで前記燃料体の上部タイプレート格子部を拘束する格子部拘束方法であって、
前記格子部拘束機構は、
前記上部タイプレート格子部の第１の辺に密着しかつ前記長手方向に延びる上部タイプレート押し付け部材と、
前記印加側平板部に形成された前記長手方向に延びた開口に着脱自在に取り付けられ、前記長手方向の中心位置から偏心している位置に厚み方向に貫通孔が形成された上部タイプレート保持部材と、
前記貫通孔を通じて前記上部タイプレート押し付け部材を押し付け可能に形成された上部タイプレート締め付け部材と、
前記上部タイプレート押し付け部材と前記燃料体を挟んで反対側に設けられて前記上部タイプレート格子部の前記第１の辺の反対側の第２の辺を支持して前記受け側平板部に支持されて付加された荷重を受ける上部タイプレート受け側部材と、
を有しており、
当該格子部拘束方法は、
燃料体の長さの確認結果に基づいて、前記上部タイプレート格子部に押し付け荷重を付加する前記格子部拘束機構の上部タイプレート締め付け部材の位置が前記上部タイプレート格子部の位置に合うように、前記格子部拘束機構の上部タイプレート保持部材の取り付け状態を調整するための取り付け状態調整ステップと、
前記取り付け状態調整ステップの後に、前記燃料体を前記燃料ホルダ内に収納する収納ステップと、
前記収納ステップの後に、前記燃料ホルダの前記格子部拘束機構によって前記燃料体を拘束する拘束ステップと、
を有することを特徴とする格子部拘束方法。 A fuel having a lattice restraining mechanism with a fuel body of a new fuel having a plurality of fuel rods arranged in a square lattice, an upper tie plate, a lower tie plate, and a plurality of fuel spacers in a horizontal direction. In order to transport in a state of being constrained in the holder, there are four including an application side flat plate portion and a receiving side flat plate portion facing the application side flat plate portion so as to extend along the longitudinal direction of the fuel body and surround the fuel body. A lattice portion restraining method for restraining an upper tie plate lattice portion of the fuel body with the fuel holder having a flat plate portion that can be opened and closed in a direction perpendicular to the longitudinal direction and having a rectangular cross section. And
The lattice portion restraining mechanism is
An upper tie plate pressing member that is in close contact with the first side of the upper tie plate lattice portion and extends in the longitudinal direction;
An upper tie plate holding member that is detachably attached to the longitudinally extending opening formed in the application-side flat plate portion, and has a through-hole formed in a thickness direction at a position deviated from a central position in the longitudinal direction; ,
An upper tie plate clamping member formed to be able to press the upper tie plate pressing member through the through hole;
Provided on the opposite side of the upper tie plate pressing member and the fuel body, and supports the second side opposite to the first side of the upper tie plate lattice portion and is supported on the receiving side flat plate portion. An upper tie plate receiving side member that receives the applied load,
Have
The lattice part restraining method is:
Based on the result of checking the length of the fuel body, the position of the upper tie plate clamping member of the lattice portion restraining mechanism that applies a pressing load to the upper tie plate lattice portion matches the position of the upper tie plate lattice portion. , An attachment state adjustment step for adjusting the attachment state of the upper tie plate holding member of the lattice portion restraining mechanism;
A storage step of storing the fuel body in the fuel holder after the attachment state adjustment step;
After the storing step, a restraining step of restraining the fuel body by the lattice portion restraining mechanism of the fuel holder;
A lattice portion restraining method characterized by comprising:
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