JPS588756B2 - How to install a nuclear reactor - Google Patents
How to install a nuclear reactorInfo
- Publication number
- JPS588756B2 JPS588756B2 JP54024181A JP2418179A JPS588756B2 JP S588756 B2 JPS588756 B2 JP S588756B2 JP 54024181 A JP54024181 A JP 54024181A JP 2418179 A JP2418179 A JP 2418179A JP S588756 B2 JPS588756 B2 JP S588756B2
- Authority
- JP
- Japan
- Prior art keywords
- wall
- reactor vessel
- frame
- inner frame
- nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Description
【発明の詳細な説明】 本発明は、原子炉の据付方法に関する。[Detailed description of the invention] The present invention relates to a method for installing a nuclear reactor.
第１図に原子炉容器と生体遮蔽体との据付構造を示す。Figure 1 shows the installation structure of the reactor vessel and biological shield.
図において、１が原子炉容器、２が生体遮蔽体、３は原
子炉容器ペデスタル、４は配管、５は生体遮蔽体配管貫
通部に配設したプラグである。In the figure, 1 is a reactor vessel, 2 is a biological shield, 3 is a reactor vessel pedestal, 4 is piping, and 5 is a plug disposed in a passage through the biological shield piping.
以上の構成において、従来、原子炉プラントの建設には
、まず原子炉容器１を据付け、次に生体遮蔽体２を据付
け、その後配管４を取付けるようにしているが、この従
来方法は、生体遮蔽体２の据付工程を完了した後でなけ
れば配管４の取付工程に移行できないいわゆるシリーズ
工程であるため、その各工程に要する作業期間の長さが
そのままプラント建設期間の長さに相当し、工事完了ま
でに多くの日数を必要としていた。Conventionally, in the construction of a nuclear reactor plant in the above configuration, the reactor vessel 1 is first installed, then the biological shield 2 is installed, and then the piping 4 is installed. Since this is a so-called series process in which the installation process for piping 4 cannot proceed until the installation process for body 2 is completed, the length of the work period required for each process directly corresponds to the length of the plant construction period, and the construction It required many days to complete.
しかし、最近では、原子炉容器１の据付以前に生体遮蔽
体２を据付け、原子炉容器１の据付工程の途中から配管
４の取付工程を並行しておこなうことにより、この種プ
ラント建設時における工期の短縮化がはかられるように
なった。However, recently, the biological shield 2 is installed before the installation of the reactor vessel 1, and the installation process of the piping 4 is carried out in parallel with the installation process of the reactor vessel 1, thereby reducing the construction time during the construction of this type of plant. began to be shortened.
この方法は、工期短縮化の点で有効であるが、原子炉容
器１の据付以前に生体遮蔽体２の据付と当該生体遮蔽体
２内へのモルタル６の打設を完了していることが必要条
件であるため、第２図に示す従来形原子炉の生体遮蔽体
配管貫通部の構造では、以下に示すような問題を生じる
ことがある。This method is effective in shortening the construction period, but it is important that the installation of the biological shield 2 and the pouring of the mortar 6 into the biological shield 2 are completed before the installation of the reactor vessel 1. Since this is a necessary condition, the structure of the bioshield piping penetration part of the conventional nuclear reactor shown in FIG. 2 may cause the following problems.
（１）原子炉容器１に形成されたノズル７と生体遮蔽体
２に配設された形枠８との取付位置に寸法的誤差があっ
てそのノズル中心と形枠中心とにズレを生じた場合、形
枠８に対するプラグ５の取付けを容易におこなうことが
できず、作業に非常な困難をきもなう。(1) There was a dimensional error in the mounting position between the nozzle 7 formed in the reactor vessel 1 and the form 8 disposed on the biological shield 2, resulting in a misalignment between the center of the nozzle and the center of the form. In this case, the plug 5 cannot be easily attached to the form 8, making the work extremely difficult.
（２）上記（１）で示した理由によってノズル中心と形
枠中心とにズレを生じた場合、配管４とプラグ５との間
のキャップＧ１さらにはプラグ５と形枠８との間のギャ
ップＧ２にそれぞれ寸法的バラツキを生じ、放射線遮蔽
上好ましくない。(2) If the center of the nozzle and the center of the form are misaligned due to the reason shown in (1) above, the gap between the cap G1 between the piping 4 and the plug 5 and the gap between the plug 5 and the form 8 This causes dimensional variations in G2, which is not preferable in terms of radiation shielding.
本発明の目的は、上記した従来技術の問題点を解消し、
原子炉容器のノズル中心と生体遮蔽体の形枠中心とを常
に一致させることにより、この種のプラント建設に要す
る作業の簡便化と炉の安全性向上化とを同時にはかり得
るようにしたものである。The purpose of the present invention is to solve the problems of the prior art described above,
By always aligning the nozzle center of the reactor vessel with the frame center of the biological shield, it is possible to simultaneously simplify the work required to construct this type of plant and improve the safety of the reactor. be.
本発明の要旨とするところは、内壁、外壁および内壁と
外壁に両端が取付けられる筒状の外側形枠とを有して前
記外側形枠の周囲で前記内壁と前記外壁との間にモルタ
ルを打設してなる生体遮蔽体を、原子炉容器支持体上に
据付け、その後、前記原子炉容器のノズル部が前記外側
形枠の方向に向くように前記原子炉容器を前記生体遮蔽
体内に挿入しかつ前記原子炉容器を前記原子炉容器支持
体上に据付け、前記ノズル部の軸心と軸心を一致させて
筒状の内側形枠を前記外側形枠内に配置し、前記内側形
枠と前記外側形枠の間にモルタルを注入し、前記内側形
枠内に配管を挿入して前記ノズル部に前記配管の一端を
取付け、前記内側形枠と前記配管との間にプラグを挿入
するようにした点にある。The gist of the present invention is to have an inner wall, an outer wall, a cylindrical outer frame whose both ends are attached to the inner wall and the outer wall, and to install mortar between the inner wall and the outer wall around the outer frame. A bioshield formed by pouring is installed on a reactor vessel support, and then the reactor vessel is inserted into the bioshield so that the nozzle portion of the reactor vessel faces in the direction of the outer form. and the reactor vessel is installed on the reactor vessel support, a cylindrical inner frame is arranged in the outer frame with the axis of the nozzle section aligned with the axis of the nozzle part, and the inner frame and the outer frame, inserting a pipe into the inner frame, attaching one end of the pipe to the nozzle part, and inserting a plug between the inner frame and the pipe. The point is that I did it like this.
以下、本発明を、第３図ないし第５図にもとづいて説明
する。Hereinafter, the present invention will be explained based on FIGS. 3 to 5.
なお、同図において、第１図および第２図と同一符号は
同一部分を示している。In addition, in this figure, the same reference numerals as in FIGS. 1 and 2 indicate the same parts.
原子炉容器１の据付以前に施工される生体遮蔽体２は、
あらかじめ工場で複数個の分割ブロックに製作され、現
地で原子炉容器ペデスタルに据付けられる。The biological shield 2 constructed before the installation of the reactor vessel 1 is
It is manufactured in advance into multiple divided blocks at a factory and installed on-site on the reactor vessel pedestal.
工場で製作される生体遮蔽体のブロックは、２種類ある
。There are two types of biological shield blocks manufactured at the factory.
１つは第３図に示すように配管貫通部に配置されるブロ
ックであり、他のものはそれ以外のところに配置される
ブロックである。One block is placed at the pipe penetration part as shown in FIG. 3, and the other blocks are placed at other locations.
前者のブロックは、第３図に示すように、金属製の内壁
１３および外壁１４を有し、配管貫通部を形成するため
の筒状の外側形枠１０の両端が内壁１３および外壁１４
に取付けられて構成される。The former block has an inner wall 13 and an outer wall 14 made of metal, as shown in FIG.
It is installed and configured.
開口部１１Ａおよび１１Ｂが、内壁１３および外壁１４
に形成される。The openings 11A and 11B are connected to the inner wall 13 and the outer wall 14.
is formed.
内壁１３と外壁１４の間には、図示されていない補強棒
が配置される。A reinforcing rod (not shown) is arranged between the inner wall 13 and the outer wall 14.
後者のブロックは、補強棒で連結される内壁１３および
外壁１４からなっている。The latter block consists of an inner wall 13 and an outer wall 14 connected by reinforcing rods.
多数のこれらのブロックをペデスタル３上に筒状になる
ように積重ね、隣接するブロックの内壁１３どうし、外
壁１４どうじを溶接にて接合する。A large number of these blocks are stacked on the pedestal 3 in a cylindrical shape, and the inner walls 13 and outer walls 14 of adjacent blocks are joined by welding.
本実施例においては、まず生体遮蔽体２の高さの下方１
／２まで多数のブロックをペデスタル５上に設置し、外
壁１３と内壁１４との間に上方よりモルタル６Ａを打設
する。In this embodiment, first, the lower part of the height of the biological shield 2 is
A large number of blocks up to /2 are placed on the pedestal 5, and mortar 6A is placed between the outer wall 13 and the inner wall 14 from above.
このとき、第４図に示す筒状の内側形枠９は、第３図に
示すように、生体遮蔽体２に取付けられておらず、外側
形枠１０のみが取付けられている。At this time, the cylindrical inner frame 9 shown in FIG. 4 is not attached to the living body shield 2, as shown in FIG. 3, and only the outer frame 10 is attached.
また、このとき、内壁１３および外壁１４の開口部１１
Ａおよび１１Ｂは、内側形枠９の外径寸法よりも小径に
穴明けされている。Also, at this time, the openings 11 of the inner wall 13 and the outer wall 14
A and 11B are bored to have a smaller diameter than the outer diameter of the inner frame 9.
次に、生体遮蔽体２の残り上方１／２部分のブ田ンクを
施工し、それらの内壁１３と外壁１４の間にモルタル６
Ａを打設する。Next, the remaining upper 1/2 part of the biological shield 2 is covered with a mortar 6 between the inner wall 13 and the outer wall 14.
Pour A.
以上のようにして、生体遮蔽体２のペデスタル５上への
据付けが完了したならば、次に原子炉容器１を据付ける
。After the installation of the biological shield 2 on the pedestal 5 is completed as described above, the reactor vessel 1 is installed next.
この状態を第３図に示す。This state is shown in FIG.
原子炉容器１が、筒状の生体遮蔽体２内に挿入され、ペ
デスタル５上に据付けられる。A reactor vessel 1 is inserted into a cylindrical biological shield 2 and installed on a pedestal 5.
当然のことながら原子炉容器１に設けられるノズル７は
外側形枠１０の方向、すなわち開口部１１Ａの方を向い
ている。Naturally, the nozzle 7 provided in the reactor vessel 1 faces in the direction of the outer form 10, ie towards the opening 11A.
原子炉容器１に形成されているノズル７の中心と内側形
枠９の中心とが一致するよう、内壁１３および外壁１４
の開口部１１Ａおよび１１Ｂを拡開切断してその拡開切
断開口部を貫通させて内側形枠９を取付ける。The inner wall 13 and the outer wall 14 are arranged so that the center of the nozzle 7 formed in the reactor vessel 1 and the center of the inner frame 9 coincide with each other.
The openings 11A and 11B are widened and cut, and the inner frame 9 is attached by passing through the widening cut openings.
次いで第４図および第５図に示すように、内側形枠９と
外側形枠１０との間の空隙にモルタル注入口１２からモ
ルタル６Ｂを注入する。Next, as shown in FIGS. 4 and 5, mortar 6B is injected into the gap between the inner frame 9 and the outer frame 10 from the mortar injection port 12.
モルタル６Ｂの注入が完了したならば、内側形枠９内を
通して配管４を配置し、配管４の一端をノズル７に溶接
する。When the injection of mortar 6B is completed, piping 4 is placed through inner frame 9, and one end of piping 4 is welded to nozzle 7.
その後、内側形枠９と配管４との間に形成される環状空
間にプラグ５を取付ける。Thereafter, the plug 5 is attached to the annular space formed between the inner frame 9 and the pipe 4.
第６図は第５図とは異った外側形枠１０の構造例を示す
第４図のＢ−Ｂ断面図で、第５図においては外側形枠１
０の断面形状を方形としたのに対し、第６図においては
、外側形枠１０の断面形状を円形とした場合を示してい
る。FIG. 6 is a cross-sectional view taken along line BB in FIG. 4 showing an example of the structure of the outer form 10 that is different from that shown in FIG.
While the cross-sectional shape of the outer frame 10 is square, FIG. 6 shows the case where the cross-sectional shape of the outer frame 10 is circular.
本発明は以上のように、生体遮蔽体２の配管貫通部に配
設する形枠を内外二重に取付け、原子炉容器１のノズル
中心と生体遮蔽体２の内側形枠中心とを常に一致させる
ようにしたから、たとえ原子炉容器１のノズル中心と生
体遮蔽体２の外側形枠中心とにズレがあっても、内側形
枠９の取付けに際してその両者間の寸法誤差を吸収する
ことができ、内側形枠９に対するプラグ５の取付けを容
易におこなうことができる。As described above, in the present invention, the form provided in the piping penetration part of the biological shield 2 is installed double, inside and outside, so that the center of the nozzle of the reactor vessel 1 and the center of the inner frame of the biological shield 2 are always aligned. Therefore, even if there is a misalignment between the center of the nozzle of the reactor vessel 1 and the center of the outer frame of the biological shield 2, it is possible to absorb the dimensional error between the two when installing the inner frame 9. Therefore, the plug 5 can be easily attached to the inner frame 9.
また、本発明によれば、配管４とプラグ５との間のギャ
ップさらにはプラグ５と内側形枠９との間のギャップに
寸法的バラツキを生じるものではないから、放射線の遮
蔽効果が損なわれることはない。Further, according to the present invention, there is no dimensional variation in the gap between the piping 4 and the plug 5, and also in the gap between the plug 5 and the inner frame 9, so that the radiation shielding effect is impaired. Never.
以上、詳述したように、本発明は、原子炉容器のノズル
中心と生体遮蔽体の内側形枠中心とを常に一致させるよ
うにしたことにより、この種プラント建設に要する作業
の簡便化と炉の安全性向上化とを同時にはかることがで
きるものであって、その効果は大きく、工業的実利性に
富んだ原子炉の据付方法を提供することができる。As described in detail above, the present invention simplifies the work required for constructing this type of plant by always aligning the center of the nozzle of the reactor vessel with the center of the inner frame of the bioshield. It is possible to improve the safety of nuclear reactors at the same time, and the effect is large, and it is possible to provide a method of installing a nuclear reactor that is highly industrially practical.
第１図は原子炉容器と生体遮蔽体との据付構造説明図、
第２図は従来形原子炉の生体遮蔽体配管貫通部構造を示
す第１図のＡ部拡大図、第３図は原子炉容器に対して配
管を取付ける以前における本発明の配管貫通部の状態を
示す説明図、第４図は本発明を実施して得られた第１図
のＡ部拡大図、第５図は第４図のＢ−Ｂ断面図、第６図
は第５図とは異った外側形枠の構造例を示す第４図のＢ
−Ｂ断面図である。
１…原子炉容器、２…生体遮蔽体、４…配管、５…プラ
グ、６Ａおよび６Ｂ…モルタル、７…ノズル、９…内側
形枠、１０…外側形枠、１１Ａ，１１Ｂ…開口部、１３
…内壁、１４…外壁。Figure 1 is an explanatory diagram of the installation structure of the reactor vessel and biological shield;
Figure 2 is an enlarged view of part A in Figure 1 showing the structure of the biological shield piping penetration part of a conventional nuclear reactor, and Figure 3 is the state of the piping penetration part of the present invention before the piping is attached to the reactor vessel. FIG. 4 is an enlarged view of part A in FIG. 1 obtained by implementing the present invention, FIG. 5 is a cross-sectional view taken along line B-B in FIG. 4, and FIG. Figure 4B shows examples of different outer frame constructions.
-B sectional view. DESCRIPTION OF SYMBOLS 1... Reactor vessel, 2... Biological shield, 4... Piping, 5... Plug, 6A and 6B... Mortar, 7... Nozzle, 9... Inner form, 10... Outer form, 11A, 11B... Opening, 13
...Inner wall, 14...Outer wall.
Claims (1)
筒状の外側形枠とを有して前記外側形枠の周囲で前記内
壁と前記外壁との間にモルタルを打設してなる生体遮蔽
体を、原子炉容器支持体上に据付け、その後、前記原子
炉容器のノズル部が前記外側形枠の方向に向くように前
記原子炉容器を前記生体遮蔽体に挿入しかつ前記原子炉
容器を前記原子炉容器支持体上に据付け、前記ノズル部
の軸心と軸心を一致させて筒状の内側形枠を前記外側形
枠内に配置し、前記内側形枠と前記外側形枠の間にモル
タルを注入し、前記内側形枠内に配管を挿入して前記ノ
ズル部に前記配管の一端を取付け、前記内側形枠と前記
配管との間にプラグを挿入する原子炉の据付方法。1. A biological shield comprising an inner wall, an outer wall, and a cylindrical outer frame with both ends attached to the inner wall and the outer wall, and mortar is cast between the inner wall and the outer wall around the outer frame. is installed on the reactor vessel support, after which the reactor vessel is inserted into the bioshield so that the nozzle part of the reactor vessel faces in the direction of the outer form, and the reactor vessel is placed on the reactor vessel support. installed on a reactor vessel support, a cylindrical inner frame is arranged within the outer frame with the axis of the nozzle section aligned with the axis of the nozzle part, and a cylindrical inner frame is arranged between the inner frame and the outer frame. A nuclear reactor installation method comprising injecting mortar, inserting a pipe into the inner frame, attaching one end of the pipe to the nozzle part, and inserting a plug between the inner frame and the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54024181A JPS588756B2 (en) | 1979-03-02 | 1979-03-02 | How to install a nuclear reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54024181A JPS588756B2 (en) | 1979-03-02 | 1979-03-02 | How to install a nuclear reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55116298A JPS55116298A (en) | 1980-09-06 |
| JPS588756B2 true JPS588756B2 (en) | 1983-02-17 |
Family
ID=12131162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54024181A Expired JPS588756B2 (en) | 1979-03-02 | 1979-03-02 | How to install a nuclear reactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS588756B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57586A (en) * | 1980-06-02 | 1982-01-05 | Tokyo Shibaura Electric Co | Method of carrying instrument into primary containment vessel and installing it |
-
1979
- 1979-03-02 JP JP54024181A patent/JPS588756B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55116298A (en) | 1980-09-06 |
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