JP6004394B2 - Heavy equipment installation method - Google Patents

Heavy equipment installation method Download PDF

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JP6004394B2
JP6004394B2 JP2012129822A JP2012129822A JP6004394B2 JP 6004394 B2 JP6004394 B2 JP 6004394B2 JP 2012129822 A JP2012129822 A JP 2012129822A JP 2012129822 A JP2012129822 A JP 2012129822A JP 6004394 B2 JP6004394 B2 JP 6004394B2
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heat insulating
insulating material
metal heat
reactor vessel
heavy equipment
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JP2013253873A (en
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克人 井波
克人 井波
徹也 矢治
徹也 矢治
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Mitsubishi Heavy Industries Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • 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
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    • Y02E30/30—Nuclear fission reactors

Description

本発明は、原子力発電施設（プラント）の建設において、原子炉格納容器内に原子炉容器、炉内構造物、蒸気発生器等の一次冷却系設備の重量機器を据え付ける工法に関する。 The present invention, in the construction of nuclear power plants (plant), the reactor vessel to the reactor containment vessel, core internals, about the construction method of installing a heavy component of the primary cooling-system of the steam generator or the like.

この種重量機器の内、例えば炉内構造物を収納するための原子炉容器は、従来、図１４に示す方法で原子炉格納容器内に搬入・据付けられていた。即ち、原子炉容器１００は、プレストレスト・コンクリート造の原子炉格納容器１０１のシリンダ部１０１ａに開けられた仮開口１０２を通して、ユニットキャリア１０３及び立起し架台１０３ａ上に横倒しされた状態で、原子炉格納容器１０１内に搬入される。   Of these kinds of heavy equipment, for example, a reactor vessel for storing a reactor internal structure has been conventionally carried in and installed in the reactor containment vessel by the method shown in FIG. That is, the reactor vessel 100 is laid down on the unit carrier 103 and the stand 103a through the temporary opening 102 opened in the cylinder portion 101a of the prestressed concrete reactor containment vessel 101 in a state where the reactor vessel 100 is laid down. It is carried into the storage container 101.

そして、搬入された原子炉容器１００は、格納容器ポーラクレーン（旋回天井クレーン：以下単にポーラクレーンと称す）１０４で立起し架台１０３ａ上に起立された後、当該ポーラクレーン１０４により所定の据付位置へ搬送され、当該据付位置に予めセットされた図示しない原子炉容器支持構造物上に据え付けられていた。   The loaded nuclear reactor vessel 100 is erected by a containment vessel polar crane (swivel overhead crane: hereinafter simply referred to as a polar crane) 104 and erected on a gantry 103a, and then is installed at a predetermined installation position by the polar crane 104. And was installed on a reactor vessel support structure (not shown) that was previously set at the installation position.

特許第３６０８７９６号公報Japanese Patent No. 3608996

ところが、上述した従来の重量機器の据付工法にあっては、ポーラクレーン１０４により重量機器を据え付けるため、ポーラクレーン１０４の設計仕様を建設時の要求荷重に合せて設定する必要があった。即ち、通常運用時は２００トン程度の設計仕様で足りるのに対し建設時には４００トン程度の設計仕様が必要となり、二重定格となるのである。   However, in the conventional heavy equipment installation method described above, since the heavy equipment is installed by the polar crane 104, it is necessary to set the design specification of the polar crane 104 according to the required load at the time of construction. That is, a design specification of about 200 tons is sufficient for normal operation, whereas a design specification of about 400 tons is required for construction, resulting in a double rating.

そこで従来では、設備に対する無駄な経費、作業を無くすため、定格荷重の変更作業を行っていた。この際、トロリー１０５上に搭載された二つのドラム（巻上げ装置）１０６ａ，１０６ｂの内の一つを取り外して、そのメンテナンス費用の軽減や巻上げ、下げ速度のアップを図っていた。そのため、荷重試験が煩雑となると共に、ドラム取外しコストが発生するという問題点があった。   Therefore, in the past, in order to eliminate unnecessary expenses and work on the equipment, a change operation of the rated load has been performed. At this time, one of the two drums (winding devices) 106a and 106b mounted on the trolley 105 is removed to reduce the maintenance cost and increase the winding / lowering speed. Therefore, there are problems that the load test becomes complicated and the drum removal cost is generated.

また、原子炉格納容器１０１のシリンダ部１０１ａに重量機器後入れ用の仮開口１０２を設けるため、重量機器の据付後に仮開口１０２を復旧（閉塞）する作業が必要であり、これが工期全体の遅延の要因になるという問題点もあった。   Further, since provisional opening 102 for loading heavy equipment is provided in cylinder portion 101a of reactor containment vessel 101, it is necessary to restore (close) temporary opening 102 after installation of heavy equipment, which delays the entire construction period. There was also a problem of becoming a factor of.

ところで、近年では、特許文献１にも開示されているように、現地での製品の搬入及び据付の効率を向上する目的で、建屋内に搬入する以前に予め複数の製品を組み立てておき、これを屋外に設置した大型クレーンで一括搬入する大型ブロック・モジュール工法が盛んに取り入れられるようになっている。   By the way, in recent years, as disclosed in Patent Document 1, a plurality of products are assembled in advance before being brought into a building for the purpose of improving the efficiency of carrying in and installing the product on site. The large-scale block module construction method that carries in a lump with a large crane installed outdoors has been actively adopted.

そこで、本発明者等は、上述した大型ブロック・モジュール工法に暗示されて、原子炉格納容器１０１内に搬入・据付けられる前述した原子炉容器１００やこの原子炉容器１００内に収納される炉内構造物、及び蒸気発生器等の重量機器を屋外に設置した大型クレーンで搬入・据付することで、重量機器の搬入・据付にあたって、ポーラクレーン１０４を使用する必要が無くなると共に重量機器後入れ用の仮開口１０２を設けなくても済むことに思い至った。   Therefore, the present inventors implied in the large-scale block / module method described above, and carried in and installed in the reactor containment vessel 101, and the reactor vessel 100 housed in the reactor vessel 100. Carrying in and installing heavy equipment such as structures and steam generators outdoors with large cranes eliminates the need to use the polar crane 104 to carry in and install heavy equipment. It has been thought that the provisional opening 102 need not be provided.

しかしながら、図１５に示すように、屋外に設置した大型クレーン１１０で重量機器を搬入・据付するということは、原子炉格納容器１０１のシリンダ部１０１ａをドーム部１０１ｂで閉鎖する前、換言すれば、ポーラクレーン１０４の上架前に、上述した重量機器を先入れするということであり、この先入れが可能になれば、工期全体の短縮にも大きく寄与することになるが、その実現には種々の課題が残存する。   However, as shown in FIG. 15, carrying in and installing heavy equipment with a large crane 110 installed outdoors means that before closing the cylinder portion 101a of the reactor containment vessel 101 with the dome portion 101b, This means that the heavy equipment mentioned above is put in first before the polar crane 104 is overlaid, and if this can be put in, it will greatly contribute to the shortening of the entire construction period. Remains.

例えば、原子炉容器１００の先入れにあっては、原子炉容器１００据付位置への原子炉容器支持構造物据付時期の前倒しが必要であり、原子炉格納容器１０１内における従来の鉄筋コンクリート構造の一次遮蔽壁では、配筋→型枠→打コン→型バラシという複数の工程を経ることから、当該一次遮蔽壁の取合い部へ原子炉容器支持構造物を吊り込むまでに相当の工期が必要となり、その要求に十分に応えることができないのである。また、この前倒しが出来ないと、その後の原子炉容器支持構造物の水平度調整期間を十分に確保することも困難となって、原子炉容器１００の据付時期が遅延することから、工期全体の短縮に大きく寄与し得なくなるのである。   For example, in the first-in insertion of the reactor vessel 100, it is necessary to advance the installation timing of the reactor vessel support structure to the reactor vessel 100 installation position, and the primary primary structure of the conventional reinforced concrete structure in the reactor containment vessel 101 is required. In the shielding wall, since it goes through a plurality of steps of reinforcement arrangement → formwork → hammering → mold separation, a considerable work period is required to suspend the reactor vessel support structure to the joint part of the primary shielding wall. The demand cannot be fully met. Further, if this advancement is not possible, it will be difficult to ensure a sufficient leveling adjustment period for the subsequent reactor vessel support structure, and the installation time of the reactor vessel 100 will be delayed. It cannot contribute greatly to shortening.

また、原子炉容器１００には、図１６に示すように、その表面をパネル状の多数の金属保温材１０９で覆う必要があるが、この金属保温材１０９の取付け作業もポーラクレーン１０４の上架前であることから、大型クレーン１１０で荷振れ等を考慮し、屋外にて行わなければならない。しかしながら、金属保温材１０９は雨に弱く、天候リスクを考慮すると短期間で金属保温材１０９の取付作業を行う必要がある。つまり、従来のように、原子炉格納容器内でパネル状の多数の金属保温材１０９を１方向に１段ずつ取り付けるのでは、金属保温材１０９の取付作業期間の短縮を十分に図ることができないのである。   Further, as shown in FIG. 16, the surface of the reactor vessel 100 needs to be covered with a number of panel-shaped metal heat insulating materials 109, and this metal heat insulating material 109 is attached before the polar crane 104 is overlaid. Therefore, the large crane 110 must be performed outdoors in consideration of load swings and the like. However, the metal heat insulating material 109 is vulnerable to rain, and it is necessary to perform the work of attaching the metal heat insulating material 109 in a short period of time considering the weather risk. That is, as in the prior art, if a large number of panel-shaped metal heat insulating materials 109 are mounted one by one in one direction in the reactor containment vessel, the mounting work period of the metal heat insulating material 109 cannot be sufficiently shortened. It is.

また、原子炉容器１００内で発生した熱エネルギーを蒸気に変えてタービン系へ送る役目をもつ蒸気発生器１０７（図１５参照）の先入れにあたっては、大型クレーン１１０を長時間占有することができないので、支持脚におけるジャッキダウンとチェーンブロックによる水平移動により蒸気発生器１０７の据付を行う際は、何らかの手段により、蒸気発生器１０７の転倒防止を図る必要があるのである。   In addition, the large crane 110 cannot be occupied for a long time when the steam generator 107 (see FIG. 15), which serves to convert the heat energy generated in the reactor vessel 100 into steam and send it to the turbine system, is used. Therefore, when the steam generator 107 is installed by jacking down the support leg and moving horizontally by the chain block, it is necessary to prevent the steam generator 107 from falling by some means.

また、原子炉容器１００内にて燃料集合体の位置決め・支持や制御棒の案内・位置決めなどを行う炉内構造物１０８（図１５参照）の先入れにあたっては、清浄度の観点から、原子炉格納容器１０１のシリンダ部１０１ａをドーム部１０１ｂで閉鎖した後しか据付を行うことができない。そのため、先入れ時は据付位置とは別の場所に仮置きする必要があり、ドーム部１０１ｂの閉鎖まで長期間の仮置き状態となることから、仮置き期間中の炉内構造物１０８の静浄度を確保する必要があるのである。尚、炉内構造物１０８は上部炉心構造物１０８ａと下部炉心構造物１０８ｂとからなる（図１５参照）。   In addition, from the standpoint of cleanliness, the reactor structure 108 (see FIG. 15), which is used to position and support the fuel assemblies in the reactor vessel 100 and guide and position the control rods, is inserted in the reactor. Installation can be performed only after the cylinder 101a of the storage container 101 is closed by the dome 101b. For this reason, it is necessary to temporarily place it in a place different from the installation position at the time of first-in, and since it will be in a temporary placement state for a long time until the dome portion 101b is closed, the in-furnace structure 108 during the temporary placement period is static. It is necessary to ensure the purity. The in-core structure 108 includes an upper core structure 108a and a lower core structure 108b (see FIG. 15).

本発明は、このような実情に鑑み提案されたものであって、原子炉容器の胴部外周に金属保温材を大型クレーンを用いて屋外で短期間で取り付けられる重量機器の据付工法を提供することを目的とする。 The present invention, which was proposed in view of such circumstances, provide a mounting construction method heavy component to be attached in a short period of time outdoors using a large crane metal heat insulator to the barrel periphery of the reactor vessel The purpose is to do.

斯かる目的を達成するための本発明に係る重量機器の据付工法は、
原子炉格納容器内に金属保温材で覆われた原子炉容器を据え付ける重量機器の据付工法において、
屋外の金属保温材取付場に複数階からなる金属保温材取付用足場を敷設し、その各階層にパネル状の金属保温材を仮置きする第１の工程と、
前記金属保温材取付用足場に屋外の大型クレーンにて原子炉容器を吊り込む第２の工程と、
前記原子炉容器の胴部外周に前記金属保温材を上層から下層へ左右２方向，上，下段並行して取り付ける第３の工程と、
前記金属保温材で覆われた原子炉容器を前記大型クレーンにて前記原子炉格納容器内の据付位置に搬入し、据え付ける第４の工程と、
を備えたことを特徴とする。 In order to achieve such an object, the heavy equipment installation method according to the present invention includes:
In the installation method of heavy equipment that installs a reactor vessel covered with a metal heat insulating material in the reactor containment vessel,
A first step of laying a metal heat insulating material mounting scaffold consisting of a plurality of floors in an outdoor metal heat insulating material mounting site, and temporarily placing a panel-shaped metal heat insulating material on each level;
A second step of suspending a reactor vessel with a large outdoor crane on the metal heat insulating material mounting scaffold;
A third step of attaching the metal heat insulating material from the upper layer to the lower layer in the left and right directions, the upper and lower stages in parallel to the outer periphery of the trunk of the reactor vessel
A fourth step of carrying in and installing the reactor vessel covered with the metal heat insulating material to the installation position in the reactor containment vessel with the large crane;
It is provided with.

前記第１の工程において、前記金属保温材取付用足場を敷設した後、前記原子炉容器の吊り込み位置に下部サポートスチールを組み立てることを特徴とする。   In the first step, after the metal heat insulating material mounting scaffold is laid, a lower support steel is assembled at a position where the reactor vessel is suspended.

前記第２の工程に先立って、前記原子炉容器を前記大型クレーンにて前記原子炉格納容器内の据付位置に据付，仮固定して胴部サポートスチールを取り付けることを特徴とする。   Prior to the second step, the reactor vessel is installed and temporarily fixed at an installation position in the reactor containment vessel with the large crane, and a trunk support steel is attached.

前記第４の工程に先立って、前記金属保温材の下端部に下部サポートスチールを取り付けることを特徴とする。   Prior to the fourth step, a lower support steel is attached to the lower end of the metal heat insulating material.

前記金属保温材は、
前記原子炉容器の胴部をパネル状に形成された４種類のピースを用い多層に亘って覆うものであり、
連結用のオーバーラップ部を下側にのみ有し各層において最初に一個宛て取り付けられる第１金属保温材と、
連結用のオーバーラップ部を下側と片側に逆Ｌ字状に有し各層において前記第１金属保温材の片側一方に複数個に亘って順次取り付けられる第２金属保温材と、
連結用のオーバーラップ部を下側と片側にＬ字状に有し各層において前記第１金属保温材の片側他方に複数個に亘って順次取り付けられる第３金属保温材と、
連結用のオーバーラップ部を下側と両側に有し各層において前記第２金属保温材と第３金属保温材との間に位置して最後に一個宛て取り付けられる第４金属保温材と、
からなる
ことを特徴とする。 The metal heat insulating material is
Is intended to cover over the multi-layer using a four-piece formed with the body portion of the reactor vessel to the panel shape,
A first metal heat insulating material which has an overlapping part for connection only on the lower side and is attached to one first in each layer;
A second metal heat insulating material which has an overlapping L-shaped portion on the lower side and one side and is sequentially attached to one side of the first metal heat insulating material in each layer over a plurality of layers,
A third metal heat insulating material that has an L-shaped connecting overlap portion on the lower side and one side and is sequentially attached to the other side of the first metal heat insulating material in a plurality of layers in each layer;
A fourth metal heat insulating material which has a connecting overlap portion on the lower side and both sides, is located between the second metal heat insulating material and the third metal heat insulating material in each layer, and is finally attached to one;
It consists of.

本発明に係る重量機器の据付工法によれば、屋外の金属保温材取付場に複数階からなる金属保温材取付用足場を敷設し、この金属保温材取付用足場上から、パネル状の金属保温材を上層から下層へ左右２方向，上下段並行して取り付けるので、金属保温材の取付作業期間の短縮を十分に図ることができる。換言すれば、金属保温材の清浄度の確保が可能となり、原子炉容器の先入れを何ら支障なく円滑に実現することができる。   According to the heavy equipment installation method according to the present invention, a metal heat insulating material mounting scaffold consisting of a plurality of floors is laid on an outdoor metal heat insulating material mounting site, and a panel-shaped metal heat insulating material is mounted on the metal heat insulating material mounting platform. Since the material is attached from the upper layer to the lower layer in the left and right directions and in parallel with the upper and lower stages, it is possible to sufficiently shorten the work period for attaching the metal heat insulating material. In other words, it is possible to ensure the cleanliness of the metal heat insulating material, and it is possible to smoothly realize the first-in reactor vessel without any trouble.

これにより、重量機器据付用のポーラクレーンの使用と重量機器搬入用の仮開口の設置を必要とせずに原子炉容器の先入れが可能となり、ポーラクレーンにおける二重定格を解消して設備に対する無駄な経費を削減することができると共に先入れにより工期全体の短縮が図れる。   This makes it possible to pre-load the reactor vessel without using a polar crane for heavy equipment installation and installing a temporary opening for carrying heavy equipment, eliminating the double rating of the polar crane and wasting equipment. Cost can be reduced and the entire construction period can be shortened by first-in.

また、本発明に係る重量機器の据付工法によれば、第３の工程を円滑かつ迅速に実現することができる。 Further , according to the heavy equipment installation method of the present invention , the third step can be realized smoothly and quickly.

本発明の実施例１を示す原子炉格納容器の平断面図である。It is a plane sectional view of a nuclear reactor containment vessel showing Example 1 of the present invention. 原子炉容器支持構造物の平面図ある。It is a top view of a nuclear reactor vessel support structure. 原子炉容器支持構造物の側面図ある。It is a side view of a nuclear reactor vessel support structure. 原子炉容器支持構造物据付の工程図である。It is process drawing of a nuclear reactor vessel support structure installation. 原子炉容器支持構造物据付の工程図である。It is process drawing of a nuclear reactor vessel support structure installation. 原子炉容器支持構造物据付の工程図である。It is process drawing of a nuclear reactor vessel support structure installation. 原子炉容器支持構造物据付の工程図である。It is process drawing of a nuclear reactor vessel support structure installation. 原子炉容器支持構造物据付の工程図である。It is process drawing of a nuclear reactor vessel support structure installation. 本発明の実施例２を示す原子力発電プラントの平面図である。It is a top view of the nuclear power plant which shows Example 2 of this invention. 原子炉容器金属保温材取付の工程図である。It is process drawing of a reactor vessel metal heat insulating material attachment. 原子炉容器金属保温材取付の工程図である。It is process drawing of a reactor vessel metal heat insulating material attachment. 原子炉容器金属保温材取付の工程図である。It is process drawing of a reactor vessel metal heat insulating material attachment. 原子炉容器金属保温材取付の工程図である。It is process drawing of a reactor vessel metal heat insulating material attachment. 原子炉容器金属保温材の構造説明図である。It is structure explanatory drawing of a reactor vessel metal heat insulating material. 本発明の実施例３を示す蒸気発生器据付の工程図である。It is process drawing of the steam generator installation which shows Example 3 of this invention. 蒸気発生器据付の工程図である。It is process drawing of a steam generator installation. 原子炉格納容器内における蒸気発生器据付部の平面図である。It is a top view of the steam generator installation part in a nuclear reactor containment vessel. 図８のＩＸ矢視図である。It is IX arrow line view of FIG. 本発明の実施例４を示す炉内構造物吊込みの工程図である。It is process drawing of in-furnace structure suspending which shows Example 4 of this invention. 原子炉格納容器内における炉内構造物仮置部及び据付部の平面図である。It is a top view of the internal structure temporary storage part and installation part in a nuclear reactor containment vessel. 炉内構造物輸送容器の構造説明図である。It is structure explanatory drawing of a reactor internal structure transport container. 炉内構造物及び中性子反射体を収容した輸送容器の断面図である。It is sectional drawing of the transport container which accommodated the reactor internal structure and the neutron reflector. 従来の重量機器据付方法の説明図である。It is explanatory drawing of the conventional heavy equipment installation method. 屋外大型クレーンによる重量機器先入れの説明図である。It is explanatory drawing of heavy equipment first insertion by an outdoor large sized crane. 従来の原子炉容器金属保温材の構造説明図である。It is structure explanatory drawing of the conventional nuclear reactor container metal heat insulating material.

以下、本発明に係る重量機器の据付工法を実施例により図面を用いて詳細に説明する。 It will be described in detail with reference to the drawings by the installation construction method of weight device according to the present invention embodiment.

図１は本発明の実施例１を示す原子炉格納容器の平断面図、図２Ａは原子炉容器支持構造物の平面図、図２Ｂは原子炉容器支持構造物の側面図、図３Ａ乃至図３Ｅは原子炉容器支持構造物据付の工程図である。 1 is a plan sectional view of a reactor containment vessel showing Embodiment 1 of the present invention, FIG. 2A is a plan view of the reactor vessel support structure, FIG. 2B is a side view of the reactor vessel support structure, and FIGS. 3E is a process diagram of the reactor vessel support structure installation.

図１に示すように、本実施例は、本発明に係る重量機器の据付工法を原子力発電施設（プラント）におけるプレストレスト・コンクリート造の原子炉格納容器（以下、ＰＣＣＶと称す）１０内に原子炉容器支持構造物（以下、ＲＶサポートと称す）１１を介して原子炉容器（以下、ＲＶと称す）１２を据え付ける工事に用いる例である。   As shown in FIG. 1, in this embodiment, the heavy equipment installation method according to the present invention is installed in a prestressed concrete reactor containment vessel (hereinafter referred to as PCCV) 10 in a nuclear power generation facility (plant). In this example, a reactor vessel (hereinafter referred to as RV) 12 is installed through a vessel support structure (hereinafter referred to as RV support) 11.

ＲＶ１２は、その外周面に４基の一次冷却材ポンプ１３Ａ〜１３Ｄに対応する４個の入口管台１４ａ〜１４ｄと４基の蒸気発生器（以下、ＳＧと称す）１５Ａ〜１５Ｄに対応する４個の出口管台１６ａ〜１６ｄが付設され、これら八個の入口管台１４ａ〜１４ｄ及び出口管台１６ａ〜１６ｄがＲＶサポート１１にそれぞれ担持されることで、一次遮蔽壁１７上の所定の据付位置に据え付けられる。   The RV 12 has four inlet nozzles 14a to 14d corresponding to the four primary coolant pumps 13A to 13D and four steam generators (hereinafter referred to as SG) 15A to 15D on the outer peripheral surface thereof. A plurality of outlet nozzles 16a to 16d are provided, and the eight inlet nozzles 14a to 14d and the outlet nozzles 16a to 16d are respectively supported by the RV support 11, whereby predetermined installation on the primary shielding wall 17 is performed. Installed in position.

ＲＶサポート１１は、図２Ａ及び図２Ｂに示すように、リング状のベースプレート１１ａとこのベースプレート１１ａの外周に付設された外周プレート１１ｂとベースプレート１１ａ上面の内周縁に沿って付設された八角形状のサポート台１１ｃとを有し、サポート台１１ｃ上には八個のサポートシュー（原子炉容器受面）１１ｄが、前記八個の入口管台１４ａ〜１４ｄ及び出口管台１６ａ〜１６ｄに対応して周方向に等間隔で設置されている。尚、図中１１ｅはベースプレート１１ａの下面に垂設された連結用補強材である。   As shown in FIGS. 2A and 2B, the RV support 11 is an octagonal support attached along a ring-shaped base plate 11a, an outer peripheral plate 11b attached to the outer periphery of the base plate 11a, and an inner peripheral edge of the upper surface of the base plate 11a. The support table 11c has eight support shoes (reactor vessel receiving surfaces) 11d around the eight inlet nozzles 14a to 14d and the outlet nozzles 16a to 16d. It is installed at equal intervals in the direction. In the figure, reference numeral 11e denotes a connecting reinforcing member suspended from the lower surface of the base plate 11a.

そして、前記ＲＶサポート１１は、図３Ａ乃至図３Ｅに示す工程で据え付けられる。   The RV support 11 is installed in the steps shown in FIGS. 3A to 3E.

先ず、図３Ａに示すように、前記ＰＣＣＶ１０内の一次遮蔽壁１７（図１参照）を鋼板コンクリート構造（以下、ＳＣ構造と称す）とし、前記ＲＶサポート１１（図２Ａ及び図２Ｂ参照）と取り合う一次遮蔽壁部分１７ａ（図３Ｂ参照）の施工箇所に所定高さの鋼板１８を屋外に設置した大型クレーン１１０で吊り込んだ後、そのＲＶ１２（図１参照）の収容空間内に寄付き架台１９を設置する。   First, as shown in FIG. 3A, the primary shielding wall 17 (see FIG. 1) in the PCCV 10 has a steel plate concrete structure (hereinafter referred to as an SC structure), and engages with the RV support 11 (see FIGS. 2A and 2B). After hanging a steel plate 18 having a predetermined height on the construction site of the primary shielding wall portion 17a (see FIG. 3B) with a large crane 110 installed outdoors, the end stand 19 is placed in the accommodation space of the RV 12 (see FIG. 1). Install.

図示例では、前記鋼板１８は内側表面鋼板１８ａと中央鋼板１８ｂと外側表面鋼板１８ｃとこれらを連結するウェブプレート１８ｄとからなり、その高さにおいては、中央鋼板１８ｂ＜内側表面鋼板１８ａ＜外側表面鋼板１８ｃとなっている。また、ウェブプレート１８ｃの高さは中央鋼板１８ｂまでとなっている。尚、図３Ａ中２０は溶接用足場である。   In the illustrated example, the steel plate 18 comprises an inner surface steel plate 18a, a central steel plate 18b, an outer surface steel plate 18c, and a web plate 18d connecting them, and at the height, the central steel plate 18b <inner surface steel plate 18a <outer surface. It is a steel plate 18c. The height of the web plate 18c is up to the central steel plate 18b. In FIG. 3A, reference numeral 20 denotes a welding scaffold.

次に、図３Ｂに示すように、前記ＰＣＣＶ１０内底部のマスコンクリート部２１へのコンクリート打設後に、前記ＲＶサポート１１と取り合う一次遮蔽壁部分１７ａのコンクリート打設（ＲＶサポート１１据付高さまで）を他の部分よりも先行して行う。   Next, as shown in FIG. 3B, after the concrete is placed on the mass concrete portion 21 at the bottom of the PCCV 10, the concrete placement (up to the RV support 11 installation height) of the primary shielding wall portion 17 a that engages with the RV support 11 is performed. This is done ahead of the other parts.

次に、図３Ｃに示すように、前記ＲＶサポート１１と取り合う一次遮蔽壁部分１７ａ（厳密には中央鋼板１８ｂの上端部）の高さ調整及び開先加工を施した後、当該一次遮蔽壁部分１７ａのコンクリート上面に前記ＲＶサポート１１の連結用補強材１１ｅに対応する歪防止兼レベル調整用受材２２を立設する。   Next, as shown in FIG. 3C, after the height adjustment and groove processing of the primary shielding wall portion 17a (strictly, the upper end portion of the central steel plate 18b) that engages with the RV support 11, the primary shielding wall portion A strain-preventing / level-adjusting receiving material 22 corresponding to the connecting reinforcing material 11e of the RV support 11 is erected on the concrete upper surface of 17a.

次いで、前記ＲＶサポート１１を大型クレーン１１０で吊り込んで歪防止兼レベル調整用受材２２及び当該受材２２上に配設したジャッキ２３上に仮置きした後、大型クレーン１１０の切離しを行う。このＲＶサポート１１の仮置き状態では、ＲＶサポート１１のサポート台１１ｃを挟むような位置に当該ＲＶサポート１１の連結用補強材１１ｅと前記歪防止兼レベル調整用受材２２が配置される。   Next, the RV support 11 is suspended by the large crane 110 and temporarily placed on the receiving member 22 for strain prevention and level adjustment and the jack 23 disposed on the receiving member 22, and then the large crane 110 is separated. In the temporarily placed state of the RV support 11, the connecting reinforcing material 11 e of the RV support 11 and the distortion preventing and level adjusting receiving material 22 are disposed at a position sandwiching the support base 11 c of the RV support 11.

次に、図３Ｄに示すように、前記ジャッキ２３を用いてＲＶサポート１１のレベル調整を周方向の八箇所で行った後、ＲＶサポート１１の外周プレート１１ｂと当該ＲＶサポート１１と取り合う一次遮蔽壁部分１７ａの中央鋼板１８ｂとの間に歪防止治具２４を取り付ける。   Next, as shown in FIG. 3D, the level of the RV support 11 is adjusted at eight locations in the circumferential direction using the jack 23, and then the outer peripheral plate 11 b of the RV support 11 and the primary shielding wall that engages with the RV support 11. A distortion prevention jig 24 is attached between the central steel plate 18b of the portion 17a.

次いで、前記一次遮蔽壁部分１７ａの歪防止兼レベル調整用受材２２とＲＶサポート１１の連結用補強材１１ｅとを溶接した後、一次遮蔽壁部分１７ａの中央鋼板１８ｂとＲＶサポート１１の外周プレート１１ｂを溶接する。   Next, after welding the strain-preventing / level-adjusting receiving material 22 of the primary shielding wall portion 17a and the connecting reinforcing material 11e of the RV support 11, the central steel plate 18b of the primary shielding wall portion 17a and the outer peripheral plate of the RV support 11 are welded. 11b is welded.

この後、前記一次遮蔽壁部分１７ａの外側表面鋼板１８ｃとＲＶサポート１１の外周プレート１１ｂとの間に新設のウェブプレート１８ｅを大型クレーン１１０で吊り込んで外側表面鋼板１８ｃ及び外周プレート１１ｂとそれぞれ溶接すると共に、既設のウェブプレート１８ｄとスプライスプレート２５を介してボルト結合する。   Thereafter, a new web plate 18e is suspended by the large crane 110 between the outer surface steel plate 18c of the primary shielding wall portion 17a and the outer peripheral plate 11b of the RV support 11, and welded to the outer surface steel plate 18c and the outer peripheral plate 11b, respectively. At the same time, the existing web plate 18d and the splice plate 25 are bolted together.

次に、図３Ｅに示すように、前記ＲＶサポート１１と取り合う一次遮蔽壁部分１７ａと前記ＲＶサポート１１との内部空間Ｃ（図３Ｄの吹き出し参照）にコンクリートを打設する。   Next, as shown in FIG. 3E, concrete is placed in an internal space C (see the blowout in FIG. 3D) between the primary shielding wall portion 17 a that engages with the RV support 11 and the RV support 11.

次いで、前記ＲＶサポート１１におけるサポートシュー１１ｄの上面レベルを計測し、サポートシュー１１ｄの水平度が悪ければ、ＲＶ１２吊込みまでに水平度調整（手仕上げ）を行う。   Next, the upper surface level of the support shoe 11d in the RV support 11 is measured, and if the level of the support shoe 11d is poor, the level adjustment (hand finishing) is performed before the RV 12 is suspended.

そして、最後に、寄付き架台１９を撤去した後、前記ＲＶ１２を大型クレーン１１０で吊り込んでＲＶサポート１１上に据え付ける。   Finally, after removing the support base 19, the RV 12 is suspended by the large crane 110 and installed on the RV support 11.

このようにして、本実施例によれば、ＰＣＣＶ１０内の一次遮蔽壁１７をＳＣ構造とし、ＲＶサポート１１と取り合う一次遮蔽壁部分１７ａのコンクリート打設を他の部分よりも先行して行うので、ＲＶサポート１１据付時期の前倒しが可能となって、ＲＶサポート１１の水平度調整期間を十分に確保することが可能となる。即ち、このＲＶサポート１１の水平度調整期間を十分に確保することは、ＲＶ１２を安定して安全にかつ高精度に据付するには大変重要なことなのである。   Thus, according to the present embodiment, the primary shielding wall 17 in the PCCV 10 has an SC structure, and the concrete placement of the primary shielding wall portion 17a that engages with the RV support 11 is performed before the other portions. The installation time of the RV support 11 can be advanced, and the leveling adjustment period of the RV support 11 can be sufficiently secured. That is, it is very important to secure a sufficient leveling adjustment period of the RV support 11 in order to stably and safely install the RV 12 with high accuracy.

この結果、ＲＶサポート１１の水平度調整期間を十分に確保しつつＲＶ１２の据付時期の遅延が回避され、工期全体の短縮に大きく寄与することになる。また、一次遮蔽壁部分１７ａに設置した歪防止兼レベル調整用受材２２等により、ＲＶサポート１１の据付要求精度は十分確保されるので、その後のＲＶサポート１１の水平度調整作業が軽減される。   As a result, a delay in the installation time of the RV 12 is avoided while sufficiently ensuring the leveling adjustment period of the RV support 11, and this greatly contributes to shortening the entire construction period. Further, since the required accuracy of installation of the RV support 11 is sufficiently secured by the receiving member 22 for preventing distortion and level adjustment installed on the primary shielding wall portion 17a, the subsequent leveling adjustment work of the RV support 11 is reduced. .

また、ＲＶサポート１１やＲＶ１２等の各種機材の吊り込みを、ＰＣＣＶ１０におけるドーム部の閉鎖前に、屋外に設置した大型クレーン１１０にて行うことで、重量機器据付用のポーラクレーン１０４（図１４参照）の使用と重量機器搬入用の仮開口１０２（図１４参照）の設置を必要とせずに、ＲＶ１２の先入れを円滑に実現することができる。即ち、ＲＶ１２の据付要求精度を従前通り維持しつつポーラクレーン１０４における二重定格を解消して設備に対する無駄な経費を削減することができると共に先入れにより工期全体の短縮が図れるのである。尚、本実施例のＲＶサポートの据付工法は、屋外に設置した大型クレーン１１０にて重量機器を先入れしない据付工法に用いても好適である。   In addition, the various cranes such as the RV support 11 and the RV 12 are suspended by the large crane 110 installed outdoors before the dome portion of the PCCV 10 is closed, so that the polar crane 104 for heavy equipment installation (see FIG. 14). ) And the provision of the temporary opening 102 (see FIG. 14) for carrying in heavy equipment, the RV 12 can be pre-inserted smoothly. That is, while maintaining the required accuracy of installation of the RV 12 as before, the double rating in the polar crane 104 can be eliminated to reduce wasteful expenses for the equipment, and the entire construction period can be shortened by the first-in. It should be noted that the RV support installation method of the present embodiment is also suitable for use in an installation method in which heavy equipment is not put in first by the large crane 110 installed outdoors.

図４は本発明の実施例２を示す原子力発電プラントの平面図、図５Ａ乃至図５Ｄは原子炉容器金属保温材取付の工程図、図６は原子炉容器金属保温材の構造説明図である。   FIG. 4 is a plan view of a nuclear power plant showing Embodiment 2 of the present invention, FIGS. 5A to 5D are process diagrams for attaching a reactor vessel metal heat insulating material, and FIG. 6 is an explanatory diagram of the structure of the reactor vessel metal heat insulating material. .

図４に示すように、本実施例は、本発明に係る重量機器の据付工法を原子力発電施設（プラント）におけるＰＣＣＶ１０内にＲＶ１２を大型クレーン１１０にて先入れする工法に適用して、屋外の金属保温材取付場ＰにてＲＶ１２の胴部外周にパネル状の多数の金属保温材（ステンレススティールフォイル等を使用してなる）を取り付ける工事に用いる例である。   As shown in FIG. 4, in this embodiment, the heavy equipment installation method according to the present invention is applied to a construction method in which the RV 12 is pre-inserted into the PCCV 10 in the nuclear power generation facility (plant) by the large crane 110. It is an example used for construction for attaching a large number of panel-shaped metal heat insulating materials (made of stainless steel foil or the like) to the outer periphery of the body portion of the RV 12 at the metal heat insulating material mounting site P.

前記金属保温材は、図６に示すように、タッピンねじ等で結合するためのオーバーラップ部３０ａ〜３０ｄの有無や配置（形状）によって４種類のピースが選択使用される。図示例では、オーバーラップ両側無し（下側には有り）金属保温材（第１金属保温材）３０Ａと、オーバーラップ逆Ｌ字型金属保温材（第２金属保温材）３０Ｂと、オーバーラップＬ字型金属保温材（第３金属保温材）３０Ｃと、オーバーラップ両側有り（下側にも有り）金属保温材（第４金属保温材）３０Ｄが用いられる。   As shown in FIG. 6, four types of pieces of the metal heat insulating material are selectively used depending on the presence or absence and arrangement (shape) of the overlap portions 30 a to 30 d for joining with a tapping screw or the like. In the illustrated example, there is no overlap both sides (there is on the lower side) metal heat insulating material (first metal heat insulating material) 30A, overlap inverted L-shaped metal heat insulating material (second metal heat insulating material) 30B, and overlap L A character-shaped metal heat insulating material (third metal heat insulating material) 30C and an overlapping both sides (also present on the lower side) metal heat insulating material (fourth metal heat insulating material) 30D are used.

そして、金属保温材の取付けにあたっては、図６中の記号内数字による取付け順番に沿って、上層から下層へ左右２方向，上下段並行方式で実施される。尚、各種記号は保温材取付けグループ数（計６グループ）を示す。   Then, the metal heat insulating material is attached in the left-right two-direction, upper-lower stage parallel system from the upper layer to the lower layer in the order of attachment by the numbers in the symbols in FIG. Various symbols indicate the number of heat insulating material mounting groups (6 groups in total).

例えば、ＲＶ１２胴部の最上段に起点となるオーバーラップ両側無し金属保温材３０Ａを取り付けた後、左方向へはオーバーラップ逆Ｌ字型金属保温材３０Ｂを、また右方向へはオーバーラップＬ字型金属保温材３０Ｃを順次並行して取り付けていき、最後に終点となるオーバーラップ両側有り金属保温材３０Ｄを取り付けて最上層における取付作業は終了する。   For example, after attaching a metal heat insulating material 30A without overlap on both sides starting from the top of the RV12 body, an overlap inverted L-shaped metal heat insulating material 30B is applied in the left direction, and an overlap L shape in the right direction. The mold metal heat insulating material 30C is sequentially attached in parallel, and finally, the metal heat insulating material 30D with overlapping both sides which is the end point is attached, and the attachment work in the uppermost layer is completed.

この際、最上層にてオーバーラップ両側無し金属保温材３０Ａとオーバーラップ逆Ｌ字型金属保温材３０Ｂとが取り付けられた時点で上から２層目の取付作業を開始し、最上層と並行して取付作業が実施される。即ち、上から２層目に起点となるオーバーラップ両側無し金属保温材３０Ａを前記オーバーラップ両側無し金属保温材３０Ａとオーバーラップ逆Ｌ字型金属保温材３０Ｂとに跨って取り付けた後、左右２方向へ最上層の取付作業と並行して実施されるのである。   At this time, the attachment work of the second layer from the top is started at the time when the metal heat insulating material 30A without overlapping both sides and the overlap inverted L-shaped metal heat insulating material 30B are attached at the uppermost layer, and in parallel with the uppermost layer. Installation work is carried out. That is, after attaching the metal heat insulating material 30A without overlap both sides starting from the second layer from the top across the metal heat insulating material 30A without overlap both sides and the overlap inverted L-shaped metal heat insulating material 30B, the left and right 2 It is carried out in parallel with the installation work of the uppermost layer in the direction.

また、ＲＶ１２先入れに伴う金属保温材３０Ａ〜３０Ｄの取付作業は図５Ａ〜図５Ｄに示す工程で実施される。   Moreover, the attaching operation | work of the metal heat insulating materials 30A-30D accompanying RV12 first insertion is implemented at the process shown to FIG. 5A-FIG. 5D.

先ず、図５Ａに示すように、屋外の金属保温材取付場Ｐに複数階からなる金属保温材取付用足場３１を敷設すると共に嵩上げ架台３４上に下部サポートスチール３２を組み立てた後、金属保温材取付用足場３１の各階層にオーバーラップ両側無し金属保温材３０Ａとオーバーラップ逆Ｌ字型金属保温材３０ＢとオーバーラップＬ字型金属保温材３０Ｃとオーバーラップ両側有り金属保温材３０Ｄを仮置きする（以上、第１の工程）。   First, as shown in FIG. 5A, a metal heat insulating material attachment scaffold 31 composed of a plurality of floors is laid on an outdoor metal heat insulating material attachment site P, and a lower support steel 32 is assembled on a raised mount 34, and then a metal heat insulating material. A metal heat insulating material 30A without overlapping both sides, an overlap inverted L-shaped metal heat insulating material 30B, an overlap L-shaped metal heat insulating material 30C, and a metal heat insulating material 30D with both overlapping sides are temporarily placed on each level of the mounting scaffold 31. (The above is the first step).

次に、図５Ｂに示すように、ＲＶ１２を屋外に設置した大型クレーン１１０でＰＣＣＶ１０内の正規の位置へ搬入、仮固定した後、当該ＲＶ１２に胴部サポートスチール３３を取り付ける。   Next, as shown in FIG. 5B, the RV 12 is carried into a regular position in the PCCV 10 with a large crane 110 installed outdoors and temporarily fixed, and then the trunk support steel 33 is attached to the RV 12.

次いで、入口及び出口管台１４ａ〜１４ｄ，１６ａ〜１６ｄの周りに金属保温材を取り付けた後、当該ＲＶ１２を大型クレーン１１０で吊り上げて屋外の金属保温材取付場Ｐへ移動し、ＲＶ１２を金属保温材取付用足場３１の吊り込み位置に降ろす（以上、第２の工程）。   Next, after attaching a metal heat insulating material around the inlet and outlet nozzles 14a to 14d and 16a to 16d, the RV 12 is lifted by the large crane 110 and moved to the outdoor metal heat insulating material attachment site P, and the RV 12 is heated to the metal heat insulating material. The material attachment scaffold 31 is lowered to the suspended position (the second step).

次に、図５Ｃに示すように、ＲＶ１２の胴部外周にオーバーラップ両側無し金属保温材３０Ａとオーバーラップ逆Ｌ字型金属保温材３０ＢとオーバーラップＬ字型金属保温材３０Ｃとオーバーラップ両側有り金属保温材３０Ｄを前述した左右２方向，上下段並行方式で上層〜下層へと順次取り付けていく（以上、第３の工程）。   Next, as shown in FIG. 5C, on the outer periphery of the RV12, there is a metal heat insulating material 30A without overlap on both sides, an overlap inverted L-shaped metal heat insulating material 30B, an overlap L-shaped metal heat insulating material 30C, and both sides of the overlap. The metal heat insulating material 30D is sequentially attached from the upper layer to the lower layer in the above-described two left and right directions and the upper and lower stages in parallel (the third step).

次に、図５Ｄに示すように、オーバーラップ両側無し金属保温材３０Ａとオーバーラップ逆Ｌ字型金属保温材３０ＢとオーバーラップＬ字型金属保温材３０Ｃとオーバーラップ両側有り金属保温材３０Ｄの全ての取付けが終了したら、金属保温材３０Ａ〜３０Ｄの下端部に下部サポートスチール３２を取り付ける。   Next, as shown in FIG. 5D, all of the metal heat insulating material 30A without overlapping both sides, the overlap inverted L-shaped metal heat insulating material 30B, the overlap L-shaped metal heat insulating material 30C, and the metal heat insulating material 30D with both overlapping sides are provided. When the attachment is completed, the lower support steel 32 is attached to the lower ends of the metal heat insulating materials 30A to 30D.

そして、最後に、ＲＶ１２を大型クレーン１１０にて金属保温材取付用足場３１からＰＣＣＶ１０内へ搬入し、正規の位置に据え付ける（以上、第４の工程）。   Finally, the RV 12 is carried into the PCCV 10 from the metal heat insulating material attachment scaffold 31 by the large crane 110 and installed at a proper position (the fourth step).

このようにして、屋外の大型クレーン１１０にてＲＶ１２をＰＣＣＶ１０内へ先入れするにあたり、ＲＶ１２の胴部外周を覆う金属保温材３０Ａ〜３０Ｄの取付作業も、ポーラクレーン１０４（図１５参照）の上架前であることから、大型クレーン１１０にて実施することになる。   In this manner, when the RV 12 is put into the PCCV 10 by the large outdoor crane 110, the metal heat insulating materials 30A to 30D that cover the outer periphery of the body of the RV 12 are also mounted on the polar crane 104 (see FIG. 15). Since it is before, it will be carried out by the large crane 110.

この際、大型クレーン１１０で荷振れ等を考慮し、屋外にて行わなければならないが、金属保温材３０Ａ〜３０Ｄは雨に弱く、天候リスクを考慮すると短期間で金属保温材３０Ａ〜３０Ｄの取付作業を行う必要がある。   At this time, it is necessary to carry out the outdoor operation in consideration of the vibration of the large crane 110. However, the metal heat insulating materials 30A to 30D are vulnerable to rain, and considering the weather risk, the metal heat insulating materials 30A to 30D can be attached in a short period of time. Need to do work.

そこで、本実施例によれば、屋外の金属保温材取付場Ｐに複数階からなる金属保温材取付用足場３１を敷設し、この金属保温材取付用足場３１上から、オーバーラップ両側無し金属保温材３０Ａと、オーバーラップ逆Ｌ字型金属保温材３０Ｂと、オーバーラップＬ字型金属保温材３０Ｃと、オーバーラップ両側有り金属保温材３０Ｄを用いて、前述した左右２方向，上下段並行方式でその取付作業を実施するので、金属保温材３０Ａ〜３０Ｄの取付作業期間の短縮を十分に図ることができる。換言すれば、金属保温材３０Ａ〜３０Ｄの清浄度の確保が可能となり、ＲＶ１２の先入れを何ら支障なく円滑に実現することができるのである。   Therefore, according to the present embodiment, the metal heat insulating material attachment scaffold 31 composed of a plurality of floors is laid on the outdoor metal heat insulating material attachment site P, and the metal heat insulation without overlap on both sides from the metal heat insulating material attachment scaffold 31. By using the material 30A, the overlap inverted L-shaped metal heat insulating material 30B, the overlap L-shaped metal heat insulating material 30C, and the metal heat insulating material 30D with both sides of the overlap, the above-described left and right directions and the upper and lower stage parallel system Since the attachment work is performed, the attachment work period of the metal heat insulating materials 30A to 30D can be sufficiently shortened. In other words, the cleanliness of the metal heat insulating materials 30A to 30D can be ensured, and the first insertion of the RV 12 can be smoothly realized without any trouble.

これにより、重量機器据付用のポーラクレーン１０４の使用と重量機器搬入用の仮開口１０２（図１４参照）の設置を必要とせずにＲＶ１２の先入れが可能となり、ポーラクレーン１０４における二重定格を解消して設備に対する無駄な経費を削減することができると共に先入れにより工期全体の短縮が図れる。   As a result, the RV 12 can be pre-inserted without requiring the use of the polar crane 104 for heavy equipment installation and the provision of the temporary opening 102 (see FIG. 14) for carrying heavy equipment. This eliminates unnecessary costs for the equipment and shortens the entire construction period through first-in.

図７Ａ及び図７Ｂは本発明の実施例３を示す蒸気発生器据付の工程図、図８は原子炉格納容器内における蒸気発生器据付部の平面図、図９Ａは図８のＩＸＡ矢視図、図９Ｂは図８のＩＸＢ矢視図である。   7A and 7B are process diagrams of the steam generator installation showing Embodiment 3 of the present invention, FIG. 8 is a plan view of the steam generator installation part in the reactor containment vessel, and FIG. 9A is a view taken along arrow IXA in FIG. 9B is a view taken along arrow IXB in FIG.

図７Ａ及び図７Ｂに示すように、本実施例は、本発明に係る重量機器の据付工法を原子力発電施設（プラント）におけるＰＣＣＶ１０内にＳＧ１５を大型クレーン１１０にて先入れして据え付ける工事に用いる例である。   As shown in FIG. 7A and FIG. 7B, this embodiment uses the heavy equipment installation method according to the present invention for installation in which SG15 is installed in a large crane 110 in a PCCV 10 in a nuclear power generation facility (plant). It is an example.

即ち、図７Ａに示すように、先ず、ＰＣＣＶ１０内の据付位置に大型クレーン１１０にてＳＧ１５を吊り込んだ後、その底部に配した４本の支持脚４０を当該支持脚４０に組み込まれた図示しないジャッキのジャッキダウンにより高さ調整して固定する。即ち、ＳＧ１５の据付高さを調整するのである。   That is, as shown in FIG. 7A, the SG 15 is first suspended by the large crane 110 at the installation position in the PCCV 10, and then the four support legs 40 arranged at the bottom thereof are incorporated in the support leg 40. Adjust the height by jacking down the jack not to be fixed. That is, the installation height of SG15 is adjusted.

次いで、ＳＧ１５の上部胴と下部胴において、上部胴支持構造物４３と図示しない下部支持構造物に組み込まれた金矢（図示せず）と上，下部胴におけるチェーンブロック４１Ａ，４１Ｂで固定した後、大型クレーン１１０を切り離す。   Next, in the upper body and the lower body of SG15, after fixing with the upper body support structure 43 and a gold arrow (not shown) incorporated in the lower support structure (not shown) and the chain blocks 41A and 41B in the upper and lower bodies, Separate the large crane 110.

次に、図７Ｂに示すように、ＳＧ１５の上方に位置して、ＰＣＣＶ１０内に大型クレーン１１０にて設置されたＳＧ転倒防止用の仮設揚重設備４２で再びＳＧ１５を吊持した後、前述したチェーンブロック４１Ａ，４１ＢにてＳＧ１５の上部胴と下部胴を水平移動させてＳＧ１５を正規の位置に据え付ける。この際、ＳＧ１５の下部胴におけるチェーンブロック４１Ｂは適宜付け足される。   Next, as shown in FIG. 7B, the SG15 is suspended again by the temporary lifting equipment 42 for preventing the SG from falling, which is located above the SG15 and installed in the large crane 110 in the PCCV10. The SG 15 is installed at a normal position by horizontally moving the upper and lower shells of the SG 15 with the chain blocks 41A and 41B. At this time, the chain block 41B in the lower trunk of the SG 15 is added as appropriate.

そして、最後に、ＳＧ１５の上部胴と下部胴において、上部胴支持構造物４３と図示しない下部支持構造物に組み込まれた金矢でＳＧ１５を一次遮蔽壁１７に据付・固定した後、仮設揚重設備４２をポーラクレーン１０４にて取り外す。   Finally, SG15 is installed and fixed on the primary shielding wall 17 with an upper trunk support structure 43 and a lower support structure (not shown) in the upper trunk and lower trunk of SG15, and then temporarily lifted. 42 is removed by the polar crane 104.

前記仮設揚重設備４２は、図８及び図９に示すように、ＳＧ１５（１５Ｃ，１５Ｄ）の上方に位置して一次遮蔽壁１７上に設けられるホイップレストレイント支柱４４ａとホイップレストレイント梁４４ａからなる本設の構造体４４を利用して設置される。この構造体４４は配管支持用等に供される。   As shown in FIGS. 8 and 9, the temporary lifting equipment 42 is provided with whipped train struts 44 a and whipped train beams disposed on the primary shielding wall 17 and positioned above the SG 15 (15C, 15D). It is installed using a main structure 44 made of 44a. This structure 44 is used for pipe support and the like.

仮設揚重設備４２は、具体的には、ＳＧ１５（１５Ｃ，１５Ｄ）に対応して、対向する二本のホイップレストレイント梁４４ａ間に架設される仮設揚重用梁４２ａと、この仮設揚重用梁４２ａ上に設置されるストランド４２ｂ及びジャッキ４２ｃと、このストランド４２ｂ及びジャッキ４２ｃから吊架されたアンカーハウジング４２ｄと、このアンカーハウジング４２ｄとＳＧ１５（１５Ｃ，１５Ｄ）の胴上部に付設されたトラニオン４５との間に掛け回されたエンドレスワイヤー４２ｅとからなる。   Specifically, the temporary lifting equipment 42 corresponds to SG15 (15C, 15D), a temporary lifting beam 42a installed between two opposing whip-train train beams 44a, and the temporary lifting beam 42a. A strand 42b and a jack 42c installed on the beam 42a, an anchor housing 42d suspended from the strand 42b and the jack 42c, and a trunnion 45 attached to the upper portion of the trunk of the anchor housing 42d and SG15 (15C, 15D). And an endless wire 42e wound around.

このようにして、ＳＧ１５の先入れにあたっては、屋外の大型クレーン１１０を長時間占有することができないので、チェーンブロック４１Ａ，４１Ｂによる水平移動と支持脚４０のジャッキダウンによる高さ調整によりＳＧ１５の据付を行う際は、何らかの手段によりＳＧ１５の転倒防止を図る必要がある。   Thus, since SG15 cannot be occupied for a long time when SG15 is put in first, SG15 is installed by adjusting the height by horizontal movement by chain blocks 41A and 41B and jackdown of support legs 40. When performing the above, it is necessary to prevent the SG15 from falling by some means.

そこで、本実施例によれば、ＰＣＣＶ１０内のＳＧ１５上方に仮設揚重設備４２を設置し、この仮設揚重設備４２にてＳＧ据付作業時の転倒防止を図るので、大型クレーンを長時間占有することなく必要に応じて効果的に使用してＳＧ１５の先入れを安全に実現することができる。   Therefore, according to the present embodiment, the temporary lifting equipment 42 is installed above the SG 15 in the PCCV 10, and the temporary lifting equipment 42 prevents falling during the SG installation work, so that a large crane is occupied for a long time. It is possible to safely implement the SG15 first-in, effectively using it as needed.

これにより、重量機器据付用のポーラクレーン１０４（図１４参照）の使用と重量機器搬入用の仮開口１０２（図１４参照）の設置を必要とせずにＳＧ１５の先入れが可能となり、ポーラクレーン１０４における二重定格を解消して設備に対する無駄な経費を削減することができると共に先入れにより工期全体の短縮が図れる。   This makes it possible to pre-insert SG15 without requiring the use of a polar crane 104 for heavy equipment installation (see FIG. 14) and installation of a temporary opening 102 for carrying in heavy equipment (see FIG. 14). This eliminates the double rating of the equipment and reduces the wasteful cost of the equipment, and shortens the entire construction period through first-in.

図１０は本発明の実施例４を示す炉内構造物吊込みの工程図、図１１は原子炉格納容器内における炉内構造物仮置部及び据付部の平面図、図１２は炉内構造物輸送容器の構造説明図、図１３は炉内構造物及び中性子反射体を収容した輸送容器の断面図である。   FIG. 10 is a process diagram for suspending an in-reactor structure showing Embodiment 4 of the present invention, FIG. 11 is a plan view of the in-reactor structure temporary storage section and the installation section in the reactor containment vessel, and FIG. FIG. 13 is a cross-sectional view of the transport container containing the in-furnace structure and the neutron reflector.

図１０及び図１１に示すように、本実施例は、本発明に係る重量機器の据付工法を原子力発電施設（プラント）におけるＰＣＣＶ１０内に炉内構造物としての下部炉心構造物５０を大型クレーン１１０にて先入れする工事に用いる例である。   As shown in FIGS. 10 and 11, in this embodiment, the heavy-duty equipment installation method according to the present invention is used to install a lower core structure 50 as a reactor internal structure in a PCCV 10 in a nuclear power generation facility (plant). It is an example used for the construction which makes first-in.

即ち、図１０に示すように、屋外のユニットキャリア５１上に密閉型輸送容器５２内に立置きされて搭載された下部炉心構造物５０を、密閉型輸送容器５２毎大型クレーン１１０で吊り上げてＰＣＣＶ１０内に先入れされるのである。   That is, as shown in FIG. 10, the lower core structure 50, which is erected and mounted in the sealed transport container 52 on the outdoor unit carrier 51, is lifted by the large crane 110 for each sealed transport container 52, and the PCCV 10. It is put in.

この際、ＰＣＣＶ１０内には、未だ、ＲＶ１２に隣接して上部炉心構造物スタンド（据付位置）５３と下部炉心構造物スタンド（据付位置）５４が設置されていないので、前記密閉型輸送容器５２は下部炉心構造物５０の仮置位置５５に直置き（先入れ）される。即ち、下部炉心構造物５０は密閉型輸送容器５２内に収納されたまま仮置きされるのである。尚、前記上部炉心構造物スタンド（据付位置）５３と下部炉心構造物スタンド（据付位置）５４はＰＣＣＶ１０のシリンダ部がドーム部で閉鎖された後設置される。   At this time, since the upper core structure stand (installation position) 53 and the lower core structure stand (installation position) 54 are not yet installed in the PCCV 10 adjacent to the RV 12, the sealed transport container 52 is It is directly placed (first-in) at the temporary placement position 55 of the lower core structure 50. That is, the lower core structure 50 is temporarily placed while being housed in the sealed transport container 52. The upper core structure stand (installation position) 53 and the lower core structure stand (installation position) 54 are installed after the cylinder portion of the PCCV 10 is closed by the dome portion.

そして、ＰＣＣＶ１０のシリンダ部にポーラクレーン１０４（図１４参照）が上架されて当該シリンダ部がドーム部で閉鎖された後、密閉型輸送容器５２が開梱され、下部炉心構造物５０がポーラクレーン１０４にて仮置位置５５から下部炉心構造物スタンド５４に移され、当該下部炉心構造物スタンド５４に据え付けられる。   Then, after the polar crane 104 (see FIG. 14) is overlaid on the cylinder portion of the PCCV 10 and the cylinder portion is closed by the dome portion, the hermetic transport container 52 is unpacked, and the lower core structure 50 is connected to the polar crane 104. Is moved from the temporary placement position 55 to the lower core structure stand 54 and installed on the lower core structure stand 54.

前記密閉型輸送容器５２は、図１２及び図１３に示すように、ポーラクレーン１０４での揚重及び機器搬入口（図示せず）からの搬出性を考慮した分割構造となっている。図示例では、上下方向に四段に亘って水平分割され、各々フランジ接合されている。   As shown in FIGS. 12 and 13, the sealed transport container 52 has a divided structure in consideration of lifting by the polar crane 104 and carrying out from an equipment carry-in port (not shown). In the example of illustration, it is divided horizontally into four steps in the up-down direction, and each is flange-joined.

また、立置きされた下部炉心構造物５０の内部には、構造的に横倒しが出来ない中性子反射体５６が工場出荷時において予め組み込まれている。尚、図１２及び図１３中５７は内部点検用のマンホール、５８は密閉型輸送容器５２内で下部炉心構造物５０を固定する固定部材、５９は大型クレーン１１０のフックが係合する吊金具である。   In addition, a neutron reflector 56 that cannot be structurally laid down is built in the standing lower core structure 50 at the time of factory shipment. 12 and 13, 57 is a manhole for internal inspection, 58 is a fixing member for fixing the lower core structure 50 in the hermetic transport container 52, and 59 is a hanging metal fitting to which the hook of the large crane 110 is engaged. is there.

このようにして、ＲＶ１２内にて燃料集合体の位置決め・支持や制御棒の案内・位置決めなどを行う下部炉心構造物５０の先入れにあたっては、清浄度の観点から、ＰＣＣＶ１０のシリンダ部をドーム部で閉鎖した後しか据付を行うことができない。そのため、先入れ時は据付位置とは別の場所に仮置きする必要があり、ドーム部の閉鎖まで長期間の仮置き状態となることから、仮置き期間中における下部炉心構造物５０の静浄度を確保する必要がある。   In this way, in the first insertion of the lower core structure 50 for positioning / supporting the fuel assemblies and guiding / positioning the control rods in the RV 12, the cylinder portion of the PCCV 10 is replaced with the dome portion from the viewpoint of cleanliness. Installation can only be carried out after it is closed. Therefore, it is necessary to temporarily place it in a place different from the installation position at the time of first-in, and since it is in a temporary placement state for a long time until the dome portion is closed, the lower core structure 50 is cleaned during the temporary placement period. It is necessary to secure the degree.

そこで、本実施例では、下部炉心構造物５０を密閉型輸送容器５２に収納した状態で大型クレーン１１０にてＰＣＣＶ１０内に先入れし、その状態のまま当該ＰＣＣＶ１０内に設置した仮置位置５５に仮置きするので、仮置き期間中における下部炉心構造物５０の静浄度が十分に確保される。   Therefore, in this embodiment, the lower core structure 50 is placed in the PCCV 10 with the large crane 110 in a state where the lower core structure 50 is housed in the sealed transport container 52, and the temporary position 55 installed in the PCCV 10 is kept in that state. Since temporary placement is performed, the degree of cleanliness of the lower core structure 50 during the temporary placement period is sufficiently ensured.

また、ＰＣＣＶ１０のシリンダ部にポーラクレーン１０４（図１４参照）が上架されて当該シリンダ部がドーム部で閉鎖された後、密閉型輸送容器５２が開梱されるが、この際、密閉型輸送容器５２は分割構造となっているので、ポーラクレーン１０４での揚重が可能であると共に機器搬入口からの搬出も可能である。   In addition, after the polar crane 104 (see FIG. 14) is overlaid on the cylinder portion of the PCCV 10 and the cylinder portion is closed by the dome portion, the hermetic transport container 52 is unpacked. Since 52 has a divided structure, it can be lifted by the polar crane 104 and can be carried out from the equipment carry-in port.

また、大型クレーン１１０での先入れのため、密閉型輸送容器５２を横倒しする必要が無いので、構造的に横倒しが出来ない中性子反射体５６を、下部炉心構造物５０に工場にて組み込んだ状態での一体搬入が可能となる。これにより、現地での炉内構造物組立期間を短縮することが可能となる。   In addition, since it is not necessary to lay down the hermetic transport container 52 for first-in with the large crane 110, the neutron reflector 56 that cannot be structurally laid down is incorporated in the lower core structure 50 at the factory. It is possible to carry in with a single unit. As a result, it is possible to shorten the on-site furnace assembly period.

このようにして、下部炉心構造物５０の清浄度を損なうことなく、大型クレーン１１０にてＰＣＣＶ１０内の仮置位置５５に先入れし、仮置きすることができるので、ポーラクレーン１０４における二重定格を解消して設備に対する無駄な経費を削減することができると共に先入れにより工期全体の短縮が図れる。   In this way, the large crane 110 can be put in and temporarily placed in the temporary placement position 55 in the PCCV 10 without impairing the cleanliness of the lower core structure 50. This can eliminate unnecessary costs for equipment and shorten the entire construction period by first-in.

また、本発明は上記各実施例に限定されず、本発明の要旨を逸脱しない範囲で、各種変更が可能であることは言うまでもない。   Further, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

本発明に係る重量機器の据付工法は、原子力発電施設（プラント）における加圧水型原子炉（ＰＷＲ）の建設工事に用いて好適である。 The heavy equipment installation method according to the present invention is suitable for construction of a pressurized water reactor (PWR) in a nuclear power generation facility (plant).

１０ 原子炉格納容器（ＰＣＣＶ）
１１ 原子炉容器支持構造物（ＲＶサポート）
１１ａ ベースプレート
１１ｂ 外周プレート
１１ｃ サポート台
１１ｄ サポートシュー（原子炉容器受面）
１１ｅ 連結用補強材
１２ 原子炉容器（ＲＶ）
１３Ａ〜１３Ｄ 一次冷却材ポンプ
１４ａ〜１４ｄ 入口管台
１５ 蒸気発生器（ＳＧ）
１５Ａ〜１５Ｄ 蒸気発生器（ＳＧ）
１６ａ〜１６ｄ 出口管台
１７ 一次遮蔽壁
１７ａ 一次遮蔽壁部分
１８ 鋼板
１８ａ 内側表面鋼板
１８ｂ 中央鋼板
１８ｃ 外側表面鋼板
１８ｄ，１８ｅ ウェブプレート
１９ 寄付き架台
２０ 溶接用足場
２１ マスコンクリート部
２２ 歪防止兼レベル調整用受材
２３ ジャッキ
２４ 歪防止治具
２５ スプライスプレート
３０Ａ オーバーラップ両側無し金属保温材（第１金属保温材）
３０Ｂ オーバーラップ逆Ｌ字型金属保温材（第２金属保温材）
３０Ｃ オーバーラップＬ字型金属保温材（第３金属保温材）
３０Ｄ オーバーラップ両側有り金属保温材（第４金属保温材）
３０ａ〜３０ｄ オーバーラップ部
３１ 金属保温材取付用足場
３２ 下部サポートスチール
３３ 胴部サポートスチール
３４ 嵩上げ架台
４０ 支持脚
４１Ａ，４１Ｂ チェーンブロック
４２ ＳＧ転倒防止用の仮設揚重設備
４２ａ 仮設揚重用梁
４２ｂ ストランド
４２ｃ ジャッキ
４２ｄ アンカーハウジング
４２ｅ エンドレスワイヤー
４３ 上部胴支持構造物
４４ 本設の構造体
４４ａ ホイップレストレイント支柱
４４ｂ ホイップレストレイント梁
４５ トラニオン
５０ 下部炉心構造物（ＬＣI）
５１ ユニットキャリア
５２ 密閉型輸送容器
５３ 上部炉心構造物スタンド（据付位置）
５４ 下部炉心構造物スタンド（据付位置）
５５ 仮置位置
５６ 中性子反射体
５７ 内部点検用のマンホール
５８ 固定部材
５９ 吊金具
１１０ 屋外に設置した大型クレーン
Ｃ 一次遮蔽壁部分とＲＶサポートとの内部空間
Ｐ 金属保温材取付場 10 Reactor containment vessel (PCCV)
11 Reactor vessel support structure (RV support)
11a Base plate 11b Outer peripheral plate 11c Support base 11d Support shoe (reactor vessel receiving surface)
11e Reinforcing material for connection 12 Reactor vessel (RV)
13A-13D Primary coolant pump 14a-14d Inlet nozzle 15 Steam generator (SG)
15A-15D Steam generator (SG)
16a to 16d Outlet nozzle base 17 Primary shielding wall 17a Primary shielding wall portion 18 Steel plate 18a Inner surface steel plate 18b Central steel plate 18c Outer surface steel plate 18d, 18e Web plate 19 Supporting base 20 Welding scaffold 21 Mass concrete part 22 Strain prevention and level adjustment Receiving material 23 Jack 24 Strain prevention jig 25 Splice plate 30A Metal insulation material without overlap on both sides (first metal insulation material)
30B Overlap inverted L-shaped metal insulation (second metal insulation)
30C Overlap L-shaped metal insulation (third metal insulation)
30D Metal insulation with overlap on both sides (4th metal insulation)
30a to 30d Overlap part 31 Scaffold for attaching metal heat insulating material 32 Lower support steel 33 Trunk support steel 34 Raising frame 40 Support leg 41A, 41B Chain block 42 SG Temporary lifting equipment for preventing overturning 42a Temporary lifting beam 42b Strand 42c Jack 42d Anchor housing 42e Endless wire 43 Upper trunk support structure 44 Main structure 44a Whipless train post 44b Whipless train beam 45 Trunnion 50 Lower core structure (LCI)
51 Unit carrier 52 Sealed transport container 53 Upper core structure stand (installation position)
54 Lower core structure stand (installation position)
55 Temporary position 56 Neutron reflector 57 Manhole for internal inspection 58 Fixing member 59 Hanging bracket 110 Large crane installed outdoors C Internal space between primary shielding wall and RV support P Metal heat insulating material installation site

Claims (5)

原子炉格納容器内に金属保温材で覆われた原子炉容器を据え付ける重量機器の据付工法において、
屋外の金属保温材取付場に複数階からなる金属保温材取付用足場を敷設し、その各階層にパネル状の金属保温材を仮置きする第１の工程と、
前記金属保温材取付用足場に屋外の大型クレーンにて原子炉容器を吊り込む第２の工程と、
前記原子炉容器の胴部外周に前記金属保温材を上層から下層へ左右２方向，上，下段並行して取り付ける第３の工程と、
前記金属保温材で覆われた原子炉容器を前記大型クレーンにて前記原子炉格納容器内の据付位置に搬入し、据え付ける第４の工程と、
を備えたことを特徴とする重量機器の据付工法。 In the installation method of heavy equipment that installs a reactor vessel covered with a metal heat insulating material in the reactor containment vessel,
A first step of laying a metal heat insulating material mounting scaffold consisting of a plurality of floors in an outdoor metal heat insulating material mounting site, and temporarily placing a panel-shaped metal heat insulating material on each level;
A second step of suspending a reactor vessel with a large outdoor crane on the metal heat insulating material mounting scaffold;
A third step of attaching the metal heat insulating material from the upper layer to the lower layer in the left and right directions, the upper and lower stages in parallel to the outer periphery of the trunk of the reactor vessel
A fourth step of carrying in and installing the reactor vessel covered with the metal heat insulating material to the installation position in the reactor containment vessel with the large crane;
A heavy equipment installation method characterized by comprising: 前記第１の工程において、前記金属保温材取付用足場を敷設した後、前記原子炉容器の吊り込み位置に下部サポートスチールを組み立てることを特徴とする請求項１に記載の重量機器の据付工法。   2. The heavy equipment installation method according to claim 1, wherein, in the first step, a lower support steel is assembled at a hanging position of the reactor vessel after the metal heat insulating material mounting scaffold is laid. 3. 前記第２の工程に先立って、前記原子炉容器を前記大型クレーンにて前記原子炉格納容器内の据付位置に据付，仮固定して胴部サポートスチールを取り付けることを特徴とする請求項１又は２に記載の重量機器の据付工法。   Prior to the second step, the reactor vessel is installed and temporarily fixed to an installation position in the reactor containment vessel with the large crane, and a trunk support steel is attached. Installation method of heavy equipment as described in 2. 前記第４の工程に先立って、前記金属保温材の下端部に下部サポートスチールを取り付けることを特徴とする請求項１，２又は３に記載の重量機器の据付工法。   Prior to the fourth step, a lower support steel is attached to a lower end portion of the metal heat insulating material, and the heavy equipment installation method according to claim 1, 2, or 3. 前記金属保温材は、
前記原子炉容器の胴部をパネル状に形成された４種類のピースを用い多層に亘って覆うものであり、
連結用のオーバーラップ部を下側にのみ有し各層において最初に一個宛て取り付けられる第１金属保温材と、
連結用のオーバーラップ部を下側と片側に逆Ｌ字状に有し各層において前記第１金属保温材の片側一方に複数個に亘って順次取り付けられる第２金属保温材と、
連結用のオーバーラップ部を下側と片側にＬ字状に有し各層において前記第１金属保温材の片側他方に複数個に亘って順次取り付けられる第３金属保温材と、
連結用のオーバーラップ部を下側と両側に有し各層において前記第２金属保温材と第３金属保温材との間に位置して最後に一個宛て取り付けられる第４金属保温材と、
からなる
ことを特徴とする請求項１，２，３又は４に記載の重量機器の据付工法。 The metal heat insulating material is
Is intended to cover over the multi-layer using a four-piece formed with the body portion of the reactor vessel to the panel shape,
A first metal heat insulating material which has an overlapping part for connection only on the lower side and is attached to one first in each layer;
A second metal heat insulating material which has an overlapping L-shaped portion on the lower side and one side and is sequentially attached to one side of the first metal heat insulating material in each layer over a plurality of layers,
A third metal heat insulating material that has an L-shaped connecting overlap portion on the lower side and one side and is sequentially attached to the other side of the first metal heat insulating material in a plurality of layers in each layer;
A fourth metal heat insulating material which has a connecting overlap portion on the lower side and both sides, is located between the second metal heat insulating material and the third metal heat insulating material in each layer, and is finally attached to one;
The heavy equipment installation method according to claim 1, 2, 3, or 4, characterized by comprising :
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